Bibliographies thématiques / Slope characterization and monitoring

Littérature scientifique sur le sujet « Slope characterization and monitoring »

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Publié le 10 mars 2023

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Articles de revues sur le sujet "Slope characterization and monitoring"

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Chen, Jian, Zhong Qi Yue et Si Jing Liu. « An Innovative Approach of Drilling Process Monitoring for Slope Characterization in Mountainous Regions ». Applied Mechanics and Materials 226-228 (novembre 2012) : 2088–92. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.2088.

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In Hong Kong, there are so many drill works for landslide prevention, such as drilling holes for soil nailing. To recognize the geotechnical condition of slope in detail based on these drillholes, we have developed and invented the drilling process monitoring (DPM) technique to accurately and quickly quantify and characterize the mechanical strength distribution beneath the slope surface. This technique is associated with the conventional air-driven rotary-percussive drilling machines with down-the-hole hammer. This drilling machine is manually portable to quickly form holes of upto 100 m deep in sloping ground. Such ground can comprise any kinds of geomaterials from soft or loose geomaterials such as caverns, clay or sand to extremely hard or strong geomaterials such concrete or granite. Therefore, we have proposed an innovative approach by using DPM method to accurately and quickly quantify the ground conditions in slopes in mountainous regions. It is trusted that the proposed approach will be able to upgrade our current slope engineering practice in mountainous regions.
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Donati, Davide, Doug Stead et Lisa Borgatti. « The Importance of Rock Mass Damage in the Kinematics of Landslides ». Geosciences 13, no 2 (9 février 2023) : 52. http://dx.doi.org/10.3390/geosciences13020052.

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The stability and kinematics of rock slopes are widely considered to be functions of lithological, structural, and environmental features. Conversely, slope damage features are often overlooked and considered as byproducts of slope deformation. This paper analyzes and discusses the potential role of slope damage, its time-dependent nature, and its control on both the stability of rock slopes and their kinematics. The analysis of several major landslides and unstable slopes, combined with a literature survey, shows that slope damage can play an important role in controlling short- and long-term slope stability. Seasonal and continuously active events cause permanent deformation within the slope due to the accumulation of slope damage features, including rock mass dilation and intact rock fracturing. Rock mass quality, lithology, and scale control the characteristics and complexity of slope damage, as well as the failure mechanism. The authors propose that the role of slope damage in slope kinematics should always be considered in slope stability analysis, and that an integrated characterization–monitoring–numerical modelling approach can enhance our understanding of slope damage, its evolution, and the controlling factors. Finally, it is emphasized that there is currently a lack of guidelines or frameworks for the quantitative assessment and classification of slope damage, which requires a multidisciplinary approach combining rock mechanics, geomorphology, engineering geology, remote sensing, and geophysics.
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Moradi, Shirin, Thomas Heinze, Jasmin Budler, Thanushika Gunatilake, Andreas Kemna et Johan Alexander Huisman. « Combining Site Characterization, Monitoring and Hydromechanical Modeling for Assessing Slope Stability ». Land 10, no 4 (15 avril 2021) : 423. http://dx.doi.org/10.3390/land10040423.

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Rainfall-induced landslides are a disastrous natural hazard causing loss of life and significant damage to infrastructure, farmland and housing. Hydromechanical models are one way to assess the slope stability and to predict critical combinations of groundwater levels, soil water content and precipitation. However, hydromechanical models for slope stability evaluation require knowledge about mechanical and hydraulic parameters of the soils, lithostratigraphy and morphology. In this work, we present a multi-method approach of site characterization and investigation in combination with a hydromechanical model for a landslide-prone hillslope near Bonn, Germany. The field investigation was used to construct a three-dimensional slope model with major geological units derived from drilling and refraction seismic surveys. Mechanical and hydraulic soil parameters were obtained from previously published values for the study site based on laboratory analysis. Water dynamics were monitored through geoelectrical monitoring, a soil water content sensor network and groundwater stations. Historical data were used for calibration and validation of the hydromechanical model. The well-constrained model was then used to calculate potentially hazardous precipitation events to derive critical thresholds for monitored variables, such as soil water content and precipitation. This work introduces a potential workflow to improve numerical slope stability analysis through multiple data sources from field investigations and outlines the usage of such a system with respect to a site-specific early-warning system.
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Alves, H. M. R., M. M. L. Volpato, T. G. C. Vieira, D. A. Maciel, T. G. Gonçalves et M. F. Dantas. « CHARACTERIZATION AND SPECTRAL MONITORING OF COFFEE LANDS IN BRAZIL ». ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B8 (23 juin 2016) : 801–3. http://dx.doi.org/10.5194/isprs-archives-xli-b8-801-2016.

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In Brazil, coffee production has great economic and social importance. Despite this fact, there is still a shortage of information regarding its spatial distribution, crop management and environment. The aim of this study was to carry out spectral monitoring of coffee lands and to characterize their environments using geotechnologies. Coffee fields with contiguous areas over 0.01 km2 within a 488.5&thinsp;km<sup>2</sup> region in the south of Minas Gerais state were selected for the study. Spectral data from the sensors OLI/Landsat 8 and the Shuttle Radar Topography Mission from 2014 to 2015 were obtained, as well as information on production areas, surface temperature, vegetation indexes, altitude and slope, were gathered and analyzed. The results indicate that there is great variation in the NDVI and NDWI values, with means ranging from 0.21 to 0.91 (NDVI) and 0.108 to 0.543 (NDWI). The altitude ranged from 803 to 1150&thinsp;m, and the surface temperature from 20.9°C to 27.6°C. The altitude and the surface temperature distribution patterns were correlated with the vegetation indexes. The slope classes were very homogeneous, predominantly with declivities between 8 to 20&thinsp;%, characterized as wavy relief. This study made possible the characterization and monitoring of coffee lands and its results may be instrumental in decision-making processes related to coffee management.
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Alves, H. M. R., M. M. L. Volpato, T. G. C. Vieira, D. A. Maciel, T. G. Gonçalves et M. F. Dantas. « CHARACTERIZATION AND SPECTRAL MONITORING OF COFFEE LANDS IN BRAZIL ». ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B8 (23 juin 2016) : 801–3. http://dx.doi.org/10.5194/isprsarchives-xli-b8-801-2016.

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In Brazil, coffee production has great economic and social importance. Despite this fact, there is still a shortage of information regarding its spatial distribution, crop management and environment. The aim of this study was to carry out spectral monitoring of coffee lands and to characterize their environments using geotechnologies. Coffee fields with contiguous areas over 0.01 km2 within a 488.5&thinsp;km&lt;sup&gt;2&lt;/sup&gt; region in the south of Minas Gerais state were selected for the study. Spectral data from the sensors OLI/Landsat 8 and the Shuttle Radar Topography Mission from 2014 to 2015 were obtained, as well as information on production areas, surface temperature, vegetation indexes, altitude and slope, were gathered and analyzed. The results indicate that there is great variation in the NDVI and NDWI values, with means ranging from 0.21 to 0.91 (NDVI) and 0.108 to 0.543 (NDWI). The altitude ranged from 803 to 1150&thinsp;m, and the surface temperature from 20.9°C to 27.6°C. The altitude and the surface temperature distribution patterns were correlated with the vegetation indexes. The slope classes were very homogeneous, predominantly with declivities between 8 to 20&thinsp;%, characterized as wavy relief. This study made possible the characterization and monitoring of coffee lands and its results may be instrumental in decision-making processes related to coffee management.
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Burjánek, Jan, Valentin Gischig, Jeffrey R. Moore et Donat Fäh. « Ambient vibration characterization and monitoring of a rock slope close to collapse ». Geophysical Journal International 212, no 1 (3 octobre 2017) : 297–310. http://dx.doi.org/10.1093/gji/ggx424.

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Guo, Yongxing, Jianjun Fu, Longqi Li et Li Xiong. « Fiber Bragg grating sensor-based monitoring strategy for slope deformation in centrifugal model test ». Sensor Review 39, no 1 (21 janvier 2019) : 71–77. http://dx.doi.org/10.1108/sr-10-2017-0218.

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Purpose Centrifugal model tests can accelerate the characterization of landslides and demonstrate the form of slope failure, which is an important measure to research its instability mechanisms. Simply observing the slope landslide before and after a centrifugal model test cannot reveal the processes involved in real-time deformation. Electromagnetic sensors have severed as an existing method for real-time measurement, however, this approach has significant challenges, including poor signal quality, interference, and complex implementation and wiring schemes. This paper aims to overcome the shortcomings of the existing measurement methods. Design/methodology/approach This work uses the advantages of fiber Bragg grating (FBG) sensors with their small form-factor and potential for series multiplexing in a single fiber to demonstrate a monitoring strategy for model centrifugal tests. A slope surface deformation displacement sensor, FBG anchor sensor and FBG anti-slide piling sensor have been designed. These sensors are installed in the slope models, while centrifugal acceleration tests under 100 g are carried out. Findings FBG sensors obtain three types of deformation information, demonstrating the feasibility and validity of this measurement strategy. Originality/value The experimental results provide important details about instability mechanisms of a slope, which has great significance in research on slope model monitoring techniques and slope stability.
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Provenzano, Giuseppe, Antonis Zervos, Mark E. Vardy et Timothy J. Henstock. « Characterization of shallow overpressure in consolidating submarine slopes via seismic full waveform inversion ». Quarterly Journal of Engineering Geology and Hydrogeology 53, no 3 (20 janvier 2020) : 366–77. http://dx.doi.org/10.1144/qjegh2019-019.

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Pore pressures higher than hydrostatic correspond to localized reductions of the level of shear stress required to induce lateral mass movement in a slope, and therefore play a key role in preconditioning submarine landsliding. In this paper, we investigate whether multi-channel seismic reflection data can be used to infer potentially destabilizing pore-pressure levels at a resolution and sensitivity useful for in-situ slope stability characterization. We simulate the continuous deposition of sediment on consolidating slopes in two scenarios, with combinations of sedimentation rate and permeability distribution leading to disequilibrium compaction. Ultra-high-frequency (UHF; 0.2–2.5 kHz) seismic reflection data are computed for each model and a stochastic full waveform inversion (FWI) method is used to retrieve the sub-seabed properties from the computed seismograms. These are then interpreted as time–depth variations in the effective stress (σʹ) regime, and therefore local overpressure ratio and factor of safety, using a combination of p-wave velocity to σʹ transforms. The results demonstrate that multi-channel UHF seismic data can provide valuable constraints on the distribution of physical properties in the top 50 m below seabed at a sub-metric scale, and with a sensitivity useful to infer destabilizing excess pore pressure levels.Thematic collection: This article is part of the Measurement and monitoring collection available at: https://www.lyellcollection.org/cc/measurement-and-monitoring
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Li, Feng, Wen Tao Zhang, Fang Li et Yan Liang Du. « Fiber Optic Inclinometer for Landslide Monitoring ». Applied Mechanics and Materials 166-169 (mai 2012) : 2623–26. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.2623.

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As a main parameter reflecting the security status of slope, internal displacement monitoring has been an important issue to geotechnical engineering. An optical inclinometer is demonstrated, which utilizes FBG sensors attached to the casing of a conventional inclinometer. Three arrays of sensors at an interval of 90 degrees are glued to the outside of inclinometer. The authors carried out model experiment, in which characterization of the sensor revealed good agreement with theory and conventional displacement measurements. Meanwhile, angle monitoring result was rewarding, monitoring value of 44.3 and 29.5 degrees corresponding to the actual value of 45 and 30 degrees respectively.
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Vanneschi, Claudio, Matthew Eyre, Mirko Francioni et John Coggan. « The Use of Remote Sensing Techniques for Monitoring and Characterization of Slope Instability ». Procedia Engineering 191 (2017) : 150–57. http://dx.doi.org/10.1016/j.proeng.2017.05.166.

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Thèses sur le sujet "Slope characterization and monitoring"

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Fernandes, Mariana Alher. « Estudo dos mecanismos de instabilização em um talude de solo arenoso não saturado localizado na região Centro-Oeste Paulista ». Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-28112016-093540/.

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A presença de encostas com solos na condição não saturada é muito comum na região Sudeste brasileira devida às características climáticas e hidrogeológicas regional. Neste caso, o mecanismo de instabilização pode ser basicamente descrito pela redução da coesão aparente provocada pela infiltração da água da chuva, causada pela diminuição ou até mesmo a anulação dos efeitos da sucção matricial, tornando o talude instável. O presente trabalho apresenta um estudo dos mecanismos instabilizadores em um talude de corte composto por solo residual arenoso localizado na Rodovia Luis Augusto de Oliveira (SP-215) no km 179+300 LE, próximo ao município de Ribeirão Bonito, Brasil. Neste trabalho foi realizado um levantamento dos dados e das propriedades do solo (física, mecânica e hidráulica) da área piloto utilizando métodos de investigação geológico-geotécnica de superfície (levantamento topográfico de detalhe, caminhamentos) e de subsuperfície (sondagem a trado e poços com coleta de amostras); ensaios de laboratório e de campo (índices físicos do solo, resistência ao cisalhamento, permeabilidade); instrumentação e monitoramento (piezômetro, pluviômetro e tensiômetro) e modelagem numérica (análises da infiltração da água da chuva e de estabilidade de talude). Na área investigada ocorrem solos residuais dos arenitos eólicos da Formação Botucatu (Grupo São Bento, Bacia Sedimentar do Paraná) de idade jurássico-cretácea. As modelagens numéricas realizadas no programa GeoStudio versão 2012 (Seep/W e Slope/W) confirmaram que é possível ocorrer deslizamentos rasos de solo somente pela redução da sucção e perda de coesão aparente. As modelagens do fluxo da água infiltrada no talude apresentaram resultados divergentes das leituras registradas pelos tensiômetros instalados no talude monitorado e os fatores de segurança mostraram serem bem superiores ao unitário, mesmo ocorrendo chuvas de alta intensidade pluviométrica. Estas modelagens numéricas também permitiram estabelecer a configuração geométrica crítica (altura e inclinação) para os taludes de corte em solo residual arenoso da Formação Botucatu.
The presence of slopes with soil in the unsaturated condition is very common in Brazil\'s Southeast region due to climate and regional hydrogeological characteristics. In this case, the instability mechanism can be basically described by the apparent cohesion loss caused by the rainfall infiltration that induced by the reduction or even annulling the effect of matric suction, making the slope conditionally unstable. This paper presents a study of instabilizing mechanisms in a cut slope composed of sandy residual soil located on Highway Luis Augusto de Oliveira (SP-215) at km 179 + 300 LE, near Ribeirão Bonito, Brazil. This work was carried out a survey of the data and soil properties (physical, mechanical and hydraulic) of pilot area using geological and geotechnical research techniques of surface (topographic survey) and subsurface (soil sampling and hand auger drilling); laboratory and field tests (physical indices soil, shear strength, permeability); instrumentation and monitoring (piezometer, rain gauge and tensiometer) and numerical modelling (analysis of rainfall infiltration and slope stability). In the investigated area occur residual soils of aeolian sandstones of Botucatu Formation (São Bento Group, Paraná Sedimentary Basin) Jurassic- Cretaceous age. The numerical modelling performed in GeoStudio version 2012 (Seep/W and Slope/W) confirmed that it is possible to have shallow soil slips just reducing the suction loss and apparent cohesion. The modelling of the infiltrated water flow on the slope showed conflicting results of the readings recorded by tensiometers installed on the monitored slope and the safety factors shown to be well above the unit, even occurring high intensity rainfall. These numerical models also allowed to establish the geometric critical configuration (height and slope angle) for cut slopes in a sandy residual soil of Botucatu Formation.
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Wei, Yukun. « Slope stability assessment through field monitoring ». Thesis, KTH, Jord- och bergmekanik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-239955.

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Deterministic methods have been used in geotechnical engineering for a long period, such as slope stability calculations. However, only applying deterministic methods is subjective and imperfect. There is a demand to develop a systematic methodology to link the assessed slope stability and field measurement data, which is also known as inverse analysis and forward calculation. Based on the Nya Slussen project, this thesis includes the development of a methodology, deterministic calculation for 4 cross sections using finite element program Plaxis 2D and probabilistic calculation for one section. Deterministic analyses showed satisfying results for all the studied cross sections since their factors of safety exceeded the minimum requirement. In probabilistic design, three parameters were found to have the most uncertainties through sensitivity analysis (undrained shear strength of clay, Young’s modulus of clay and friction angle of fill). Inverse analysis was done by testing different values of them in Plaxis and to try to match the displacement components provided by field measurement. After finding the best optimization for all the parameters, forward calculation gave a final factor of safety. It is suggested that both of the methods should be utilized together for better assessment.
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Li, Aiguo, et 李愛國. « Field monitoring of a saprolite cut slope ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B29901765.

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Momand, Farid A. « Monitoring Slope Stability Problems Utilizing Electrical and Optical TDR ». Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1289317906.

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Smith, Alister. « Quantification of slope deformation behaviour using acoustic emission monitoring ». Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/18593.

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Early warning of slope instability will enable evacuation of vulnerable people and timely repair and maintenance of critical infrastructure. However, currently available warning systems are too expensive for wide-scale use or have technical limitations. The acoustic emission (AE) monitoring approach using active waveguides (i.e. a steel tube with granular backfill surround installed in a borehole through a slope), in conjunction with the Slope ALARMS AE measurement system, has the potential to be an affordable early warning system for slope instability. However, the challenge has been to develop strategies to interpret and quantify deformation behaviour from measured AE. The development of an approach to quantify slope deformation behaviour from measured AE will enable the AE monitoring system to provide early warning of slope instability through detecting, quantifying and communicating accelerations in slope movement. Field monitoring and full-scale physical modelling have been conducted to characterise the AE response from the system to both reactivated slope movements and first-time slope failure. Definitive field evidence has been obtained showing AE monitoring can measure slope movements and generated AE rates are proportional to slope displacement rates, which was confirmed through comparisons with both conventional inclinometer and continuous ShapeAccelArray deformation measurements. A field monitoring case study demonstrated that the AE approach can detect very slow slope movements of 0.075 mm/day. In addition, the concept of retrofitting inclinometer casings with active waveguides to convert the manually read instrument to a real-time monitoring system has been demonstrated using a field trial. Dynamic strain-controlled shear tests on active waveguide physical models demonstrated that AE monitoring can be used to quantify slope displacement rates, continuously and in real-time, with accuracy to within an order of magnitude. Large-scale first-time slope failure experiments allowed the AE response to slope failure to be characterised. AE was detected after shear deformations of less than a millimetre in previously un-sheared material, and AE rates increased proportionally with displacement rates as failure occurred. The AE rate-displacement rate relationship can be approximated as linear up to 100 mm/hour and shear surface deformations less than 10-20 mm. At greater velocities and larger deformations the gradient of the relationship progressively increases and is best represented using a polynomial. This is because complex pressure distributions develop along the active waveguide analogous to a laterally loaded pile, and the confining pressures increase. Variables that influence the AE rate-displacement rate relationship have been quantified using physical model experiments and empirical relationships. A framework has been developed to allow AE rate-displacement rate calibration relationships to be determined for any AE system installation. This provides a universal method that can be used by practitioners when installing AE systems, to calibrate them to deliver alarm statuses/warning levels that are related to slope displacement rates. Use of this framework has been demonstrated using a case study example, and decision making protocols have been suggested that use trends in alarms with time to trigger decisions, which could be to send an engineer to inspect the slope, manage traffic, or evacuate people.
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Mologni, Omar. « Cable tensile force monitoring in steep slope forest operations ». Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3426820.

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The interest in active sustainable management of mountain forests is increasing around the world. Great effort, in particular, is focusing on the identification of efficient, safe, and sustainable steep slope harvesting solutions adapted to different environmental conditions. The main attention is moving toward winch-assist harvesting systems on trafficable terrain and European designed standing skyline mobile tower yarders on non-trafficable terrain. These cable-supported harvesting solutions have similar safety issues related to the use of tensioned wire ropes and the use of natural anchors. This research focused on the analysis of cable tensile force while operating with these harvesting solutions in ordinary harvesting sites and operational conditions. First, a state-of-the-art about the steep slope cable-supported harvesting solutions and their main safety issues was completed. A particular focus was dedicated to the significant works on cable tensile force monitoring. Following, field studies were successfully carried out to monitor the cable tensile forces on ordinary logging operations. The survey interested eleven mobile tower yarders, observed on twelve different cable lines in the Italian Alps, and three large integrated-winch forwarders, observed on eight trails in the interior of British Columbia (Canada). A similar approach, based on the integration of tensile force monitoring, video recording of the operations, ground profile analysis, and load measurement/estimation, was applied to both the cable-supported systems. The case studies, the methodological approach used for the data collection and analysis, and the results of the monitoring are presented and reported in detail.
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Forward, Troy Andrew. « Quasi-Continuous GPS Steep Slope Monitoring : A Multi-Antenna Array Approach ». Thesis, Curtin University, 2002. http://hdl.handle.net/20.500.11937/409.

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This thesis investigates the design, implementation and validation of a multi-antenna GPS system to monitor the displacement of deforming slopes. The system utilises a switched antenna array design allowing data from multiple antennas to be sampled sequentially by one GPS receiver. The system provides quasi-continuous GPS observations that can produce a precise and reliable coordinate time-series of the movement of the slope under consideration. GPS observations and particularly those concerned with the monitoring of steep slopes, are subject to systematic errors that can significantly degrade the quality of the processed position solutions. As such, this research characterises the data in terms of multipath effects, the spectrum of the coordinate time-series, and the carrier to noise power density ratio of the raw GPS observations. Various GPS processing parameters are then investigated to determine optimal processing parameters to improve the precision of the resulting coordinate time-series. Results from data stacking techniques that rely on the daily correlation of the repeating multipath signature find that the GPS data actually decorrelates somewhat from day to day. This can reduce the effectiveness of stacking techniques for the high precision monitoring of steep slopes. Finally, advanced stochastic models such as elevation angle and carrier-to-noise weighting are investigated to optimise the precision of the coordinate time-series data. A new in-line stochastic model is developed based on weighting GPS observations with respect to the level of systematic error present within the data. By using these advanced types of stochastic models, reductions to the noise level of the coordinate time-series of approximately 20 and 25 percent are possible in the horizontal and height components respectively.Results from an extensive field trial of this system on a deforming high-wall of an open-pit mine indicate that approximately 135mm of displacement occurred over the 16-week field trial. The precision of the coordinate time-series for surface stations approaches ±4.Omm and ±5.4mm in the horizontal and height components respectively. For sub-surface stations next to the mine wall, coordinate precision has been determined as ±4.9mm.component and ±7.6mm in the height component respectively.
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Forward, Troy Andrew. « Quasi-Continuous GPS Steep Slope Monitoring : A Multi-Antenna Array Approach ». Curtin University of Technology, Department of Spatial Sciences, 2002. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=11914.

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This thesis investigates the design, implementation and validation of a multi-antenna GPS system to monitor the displacement of deforming slopes. The system utilises a switched antenna array design allowing data from multiple antennas to be sampled sequentially by one GPS receiver. The system provides quasi-continuous GPS observations that can produce a precise and reliable coordinate time-series of the movement of the slope under consideration. GPS observations and particularly those concerned with the monitoring of steep slopes, are subject to systematic errors that can significantly degrade the quality of the processed position solutions. As such, this research characterises the data in terms of multipath effects, the spectrum of the coordinate time-series, and the carrier to noise power density ratio of the raw GPS observations. Various GPS processing parameters are then investigated to determine optimal processing parameters to improve the precision of the resulting coordinate time-series. Results from data stacking techniques that rely on the daily correlation of the repeating multipath signature find that the GPS data actually decorrelates somewhat from day to day. This can reduce the effectiveness of stacking techniques for the high precision monitoring of steep slopes. Finally, advanced stochastic models such as elevation angle and carrier-to-noise weighting are investigated to optimise the precision of the coordinate time-series data. A new in-line stochastic model is developed based on weighting GPS observations with respect to the level of systematic error present within the data. By using these advanced types of stochastic models, reductions to the noise level of the coordinate time-series of approximately 20 and 25 percent are possible in the horizontal and height components respectively.
Results from an extensive field trial of this system on a deforming high-wall of an open-pit mine indicate that approximately 135mm of displacement occurred over the 16-week field trial. The precision of the coordinate time-series for surface stations approaches ±4.Omm and ±5.4mm in the horizontal and height components respectively. For sub-surface stations next to the mine wall, coordinate precision has been determined as ±4.9mm.component and ±7.6mm in the height component respectively.
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Logan, Kenneth Scott. « Analysis of Wireless Tiltmeters for Ground Stability Monitoring ». Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/32009.

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Tiltmeters can be used in the mining environment to monitor slope stability by making use of gravitational force to measure angles of inclination relative to horizontal. Tiltmeters typically use accelerometers, which output a voltage measurement that can be related to angle of tilt. Though wireless tiltmeters already exist today, they lack certain ruggedness and sensitivity preventing use in mines. The purpose of this project was to investigate the feasibility of using already existing wireless tiltmeters in the mining setting. Additionally, a new wireless tiltmeter was designed which could be specially tailored for the needs of monitoring hazardous rock bodies in both surface and underground mines. By recording angles of any slope, either in a surface mine or underground, over extended periods of time, changes in readings can infer instabilities in the rock mass underlying the slope being measured. By placing many tiltmeters in a mesh on a surface slope or underground roof, rib, or other face, the entire surface can be monitored. Compared to the measurements of a single point using one instrument, a dense network can be extremely useful in detecting rock movement. Many monitoring techniques are in use already in mines. Traditional methods of monitoring, though undeniably useful, are often time consuming. By utilizing wireless devices that transmit data back to a single location, data acquisition and analysis time can be minimized, saving the mine employee hours as well as down time. As surface mines continue to deepen, and underground mines continue to progress further from the surface, the extent of necessary monitoring continues to increase: this widening range will require greater time for proper monitoring, unless an automated system is implemented. With proper wireless equipment, real time monitoring of an entire mine is possible.
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Chandarana, Upasna Piyush, et Upasna Piyush Chandarana. « Optimizing Geotechnical Risk Management Analysis ». Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/625550.

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Mines have an inherent risk of geotechnical failure in both rock excavations and tailings storage facilities. Geotechnical failure occurs when there is a combination of exceptionally large forces acting on a structure and/or low material strength resulting in the structure not withstanding a designed service load. The excavation of rocks can cause unintended rock mass movements. If the movement is monitored promptly, accidents, loss of ore reserves and equipment, loss of lives, and closure of the mine can be prevented. Mining companies routinely use deformation monitoring to manage the geotechnical risk associated with the mining process. The aim of this dissertation is to review the geotechnical risk management process to optimize the geotechnical risk management analysis. In order to perform a proper analysis of slope instability, understanding the importance as well as the limitations of any monitoring system is crucial. Due to the potential threat associated with slope stability, it has become the top priority in all risk management programs to predict the time of slope failure. Datasets from monitoring systems are used to perform slope failure analysis. Innovations in slope monitoring equipment in the recent years have made it possible to scan a broad rock face in a short period with sub-millimetric accuracy. Instruments like Slope Stability Radars (SSR) provide the quantitative data that is commonly used to perform risk management analysis. However, it is challenging to find a method that can provide an accurate time of failure predictions. Many studies in the recent past have attempted to predict the time of slope failure using the Inverse Velocity (IV) method, and to analyze the probability of a failure with the fuzzy neural networks. Various method investigated in this dissertation include: Minimum Inverse Velocity (MIV), Maximum Velocity (MV), Log Velocity (LV), Log Inverse Velocity (LIV), Spline Regression (SR) and Machine Learning (ML). Based on the results of these studies, the ML method has the highest rate of success in predicting the time of slope failures. The predictions provided by the ML showed ~86% improvement in the results in comparison to the traditional IV method and ~72% improvement when compared with the MIV method. The MIV method also performed well with ~75% improvement in the results in comparison to the traditional IV method. Overall, both the new proposed methods, ML and MIV, outperformed the traditional inverse velocity technique used for predicting slope failure.
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Livres sur le sujet "Slope characterization and monitoring"

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Cunha, M. da Conceição. Groundwater characterization, management and monitoring. Southampton : WIT Press, 2011.

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Board, Iowa Highway Research. Innovative solutions for slope stability reinforcement and characterization. Ames, Iowa : Center for Transportation Research and Education, Iowa State University, 2005.

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1929-, Wilson L. G., Everett Lorne G et Cullen Stephen J, dir. Handbook of vadose zone characterization & monitoring. Boca Raton : Lewis Publishers, 1995.

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Schenderlein, William. Ground water quality monitoring program : Colorado western slope. [Denver, Colo.?] : Colorado Division of Water Resources, Office of the State Engineer, 1993.

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Austin, Bradford. Ground water monitoring activities, west slope of Colorado. [Denver, Colo.?] : Agricultural Chemicals Program, Water Quality Control Division, Colorado Dept. of Public Health and Environment, 1998.

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Chopra, Satinder. Heavy oils : Reservoir characterization and production monitoring. Tulsa, OK : Society of Exploration Geophysicists, 2010.

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Chopra, Satinder. Heavy oils : Reservoir characterization and production monitoring. Tulsa, OK : Society of Exploration Geophysicists, 2010.

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U.S. Dept. of Energy. Characterization, monitoring, and sensor technology crosscutting program. [Washington, D.C.?] : U.S. Dept. of Energy, 1995.

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Cao, Zijun, Yu Wang et Dianqing Li. Probabilistic Approaches for Geotechnical Site Characterization and Slope Stability Analysis. Berlin, Heidelberg : Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-52914-0.

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Kline, Thomas C. North Slope amphidromy assessment : Final report. [Fairbanks : University of Alaska, Coastal Marine Institute, 1999.

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Chapitres de livres sur le sujet "Slope characterization and monitoring"

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Zhang, Zhiyong. « Characterization and Monitoring of an Unstable Rock Face by Microseismic Methods ». Dans Civil and Environmental Engineering for the Sustainable Development Goals, 97–108. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99593-5_8.

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AbstractUnstable rock slopes are likely to cause rockfalls, threatening human lives and properties, industrial activities, and transportation infrastructures in mountain areas. There is an increasing demand to forecast and mitigate the potential damage of rockfalls by developing a reliable early warning system. In this thesis, an unstable mountain slope in northern Italy was selected as the research target. A microseismic monitoring network has been operating since 2013 as a field research laboratory to study the microseismic monitoring technique in the perspective of developing rockfall early warning systems. Locating microseismic events is a basic step of this technique to obtain the location of developing cracks as possible precursors of rockfalls. However, it is still a challenging task due to the heterogeneity of fractured rock slopes. The main purpose of this thesis is to address the issues related to event localization for microseismic monitoring strategy applied to the unstable rock face. Graphical Abstract
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Wyllie, Duncan C. « Movement monitoring ». Dans Rock Slope Engineering, 443–62. Fifth edition. | Boca Raton : Taylor & Francis, CRC Press, 2017. : CRC Press, 2017. http://dx.doi.org/10.4324/9781315154039-15.

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Wyllie, Duncan C. « Movement monitoring ». Dans Rock Slope Engineering, 443–62. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742 : CRC Press, 2017. http://dx.doi.org/10.1201/9781315154039-16.

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Changwei, Yang, Zhang Jingyu, Lian Jing, Yu Wenying et Zhang Jianjing. « Seismic Array Monitoring Results Analysis ». Dans Slope Earthquake Stability, 19–30. Singapore : Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2380-4_2.

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Pumjan, S., et D. S. Young. « Localized probabilistic site characterization in geotechnical engineering ». Dans Slope Stability Engineering, 1079–84. London : Routledge, 2021. http://dx.doi.org/10.1201/9780203739600-77.

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Brigante, Domenico. « Characterization and Monitoring ». Dans New Composite Materials, 127–36. Cham : Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-01637-5_8.

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Corominas, J., J. Moya, A. Ledesma, J. Rius, J. A. Gili et A. Lloret. « Monitoring of the Vallcebre landslide, Eastern Pyrenees, Spain ». Dans Slope Stability Engineering, 1239–44. London : Routledge, 2021. http://dx.doi.org/10.1201/9780203739600-107.

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Timpanaro, Juan Pablo, Isabelle Chrisment et Olivier Festor. « I2P’s Usage Characterization ». Dans Traffic Monitoring and Analysis, 48–51. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28534-9_5.

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Petro, L., E. Polaščinová et P. Wagner. « Evaluation of stream-like landslide activity based on the monitoring results ». Dans Slope Stability Engineering, 1217–22. London : Routledge, 2021. http://dx.doi.org/10.1201/9780203739600-103.

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Vladut, T. I. « Microseismic slope monitoring in surface mines ». Dans Geotechnical Stability in Surface Mining, 385–94. London : CRC Press, 2022. http://dx.doi.org/10.1201/9781003079286-59.

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Actes de conférences sur le sujet "Slope characterization and monitoring"

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Vasconcellos, C. R. A., H. R. Oliveira et J. C. Freitas. « A Historical Case in the Bolivia-Brazil Natural Gas Pipeline : Slope on the Curriola River ». Dans 2004 International Pipeline Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ipc2004-0400.

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The Bolivia-Brazil Natural Gas Pipeline has 2.600 kilometers since Rio Grande City in Bolivia until Canoas City, in south Brazil. The pipeline crosses a lot of types of geological field and difficult topography. The south spread of the pipeline is the most interesting because of its hard topography combined with the variety of geological materials, such as, colluvium deposits and debris flow areas. Curriola River is located at kilometer 408, north part of Parana State. In this area, the pipeline crosses slopes of 40 degrees of inclination. The mounting was only possible making high cuts to assure the appropriated bendings to the pipe. The high cuts generated high volumes of soil that had no place to be deposited. The construction staff decided to put all the material above the right-of-way, in down part of the slope, near Curriola River. The construction created an artificial colluvium. As well as the most colluvium mass around the world, the Curriola material is a non-resistance material, composed with clay and little rock blocks, with a high porosity. Every year, during the raining seasons, the mass movements generate tension cracks. A superficial drainage system was built in order to prevent these movements but it’s not sufficient because the embankment is more than 5 meters high. Studies have been carried out since the start of the pipeline operation. The most difficult part of the work is the access to the area that makes the whole activity a battle. The first field investigation was conclude in January 2003, composed by SPT tests, piezometer installation and investigation wells. The second part of the story will be composed by inclinometer and strain gauges installation and monitoring, together with laboratory tests with samples of the field. The aim of this paper is to present the site characterization of the Curriola River Slope, together with all the investigation made, including state of stress field, and residual stresses assessment, in order to supply the studies with condensed information for the slope stabilization and gas pipeline integrity.
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Saunders, Peter, Joseph Mukendi Kabuya, A. Torres et Richard Simon. « Post-blast slope stability monitoring with slope stability radar ». Dans 2020 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering. Australian Centre for Geomechanics, Perth, 2020. http://dx.doi.org/10.36487/acg_repo/2025_30.

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Elmouttie, Marc, Xun Luo, Peter Dean, J. Duan et J. Malos. « Slope monitoring using sensor fusion ». Dans SSIM 2021 : Second International Slope Stability in Mining Conference. Australian Centre for Geomechanics, Perth, 2021. http://dx.doi.org/10.36487/acg_repo/2135_11.

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Armstrong, Jorge, Robert Sharon, Chad Williams et Bradley Ross. « Risk-based slope monitoring framework ». Dans 2020 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering. Australian Centre for Geomechanics, Perth, 2020. http://dx.doi.org/10.36487/acg_repo/2025_01.

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Yi, Wen, Yonghe Wang, Bing Yi et Peng Yin. « A Case Study of Slope Monitoring for Highway Cut Slope ». Dans GeoHunan International Conference 2011. Reston, VA : American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/47627(406)16.

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Zhang, Yucheng, Guanghua Yang et Haiying Hu. « Research on deformation characteristics of slope based on slope monitoring ». Dans 2011 Second International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2011. http://dx.doi.org/10.1109/mace.2011.5987708.

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Carnicero, Martin. « A Rating Method for Assessment Risk at River Crossings ». Dans ASME 2013 International Pipeline Geotechnical Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ipg2013-1923.

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Detailed studies performed to design works at river crossings provide all the information needed to asses hydro technical hazards. TGN performed such studies for critical rivers as part of its Integrity Management Program. By monitoring performance of remediation works, experience was built throughout 10 years comprising different hydrological years. This was the base for the development of a simpler methodology aimed at assessing risk using information that can be readily available in regions such as Latin America where the existence of gaging stations and historic records at most rivers are not common. The method is based in river geomorphology, summarized with two parameters: area of drainage basin area and river slope at the crossing. They characterized the type of problems that can be expected and they can be estimated from topographic maps or digital terrain models available from the internet. The rating method follows a basic structure consisting in the product of two factors: causes and consequences. Causes include: bank erosion, river bed scour, meanders and river diversion along the right of way. Then, increasing factors are applied accounting for deforestation, land use and the occurrence of debris flows; decreasing factors consider proper remediation works, design and construction aspects implemented during construction. Finally, consequences are focused at loss of human life, impact on the environment, and interruption of fluid transport. This method is aimed to be performed by a pipeline operator that can have a good feeling of problems related to rivers, without having the technical knowledge of a specialized consultant. While rating, subjective judgment still plays an important role. However, this methodology provides a systematic approach that includes all aspects affecting river crossings, allows for prioritizing works based on rates and, as new rivers are included from new watersheds, it can be improved as prediction and characterization tool.
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Xiao, Yong, Vineet R. Kamat et SangHyun Lee. « Monitoring Excavation Slope Stability Using Drones ». Dans Construction Research Congress 2018. Reston, VA : American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481264.017.

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Marr, W. Allen. « Instrumentation and Monitoring of Slope Stability ». Dans Geo-Congress 2013. Reston, VA : American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784412787.222.

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Mrlina, J. « Monitoring Hazardous Open Pit Mine Slope ». Dans 74th EAGE Conference and Exhibition incorporating EUROPEC 2012. Netherlands : EAGE Publications BV, 2012. http://dx.doi.org/10.3997/2214-4609.20148183.

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Rapports d'organisations sur le sujet "Slope characterization and monitoring"

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Habib, Ayman, Darcy M. Bullock, Yi-Chun Lin et Raja Manish. Road Ditch Line Mapping with Mobile LiDAR. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317354.

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Maintenance of roadside ditches is important to avoid localized flooding and premature failure of pavements. Scheduling effective preventative maintenance requires mapping of the ditch profile to identify areas requiring excavation of long-term sediment accumulation. High-resolution, high-quality point clouds collected by mobile LiDAR mapping systems (MLMS) provide an opportunity for effective monitoring of roadside ditches and performing hydrological analyses. This study evaluated the applicability of mobile LiDAR for mapping roadside ditches for slope and drainage analyses. The performance of alternative MLMS units was performed. These MLMS included an unmanned ground vehicle, an unmanned aerial vehicle, a portable backpack system along with its vehicle-mounted version, a medium-grade wheel-based system, and a high-grade wheel-based system. Point cloud from all the MLMS units were in agreement in the vertical direction within the ±3 cm range for solid surfaces, such as paved roads, and ±7 cm range for surfaces with vegetation. The portable backpack system that could be carried by a surveyor or mounted on a vehicle and was the most flexible MLMS. The report concludes that due to flexibility and cost effectiveness of the portable backpack system, it is the preferred platform for mapping roadside ditches, followed by the medium-grade wheel-based system. Furthermore, a framework for ditch line characterization is proposed and tested using datasets acquired by the medium-grade wheel-based and vehicle-mounted portable systems over a state highway. An existing ground filtering approach is modified to handle variations in point density of mobile LiDAR data. Hydrological analyses, including flow direction and flow accumulation, are applied to extract the drainage network from the digital terrain model (DTM). Cross-sectional/longitudinal profiles of the ditch are automatically extracted from LiDAR data and visualized in 3D point clouds and 2D images. The slope derived from the LiDAR data was found to be very close to highway cross slope design standards of 2% on driving lanes, 4% on shoulders, as well as 6-by-1 slope for ditch lines. Potential flooded regions are identified by detecting areas with no LiDAR return and a recall score of 54% and 92% was achieved by the medium-grade wheel-based and vehicle-mounted portable systems, respectively. Furthermore, a framework for ditch line characterization is proposed and tested using datasets acquired by the medium-grade wheel-based and vehicle-mounted portable systems over a state highway. An existing ground filtering approach is modified to handle variations in point density of mobile LiDAR data. Hydrological analyses, including flow direction and flow accumulation, are applied to extract the drainage network from the digital terrain model (DTM). Cross-sectional/longitudinal profiles of the ditch are automatically extracted from LiDAR data, and visualized in 3D point clouds and 2D images. The slope derived from the LiDAR data was found to be very close to highway cross slope design standards of 2% on driving lanes, 4% on shoulder, as well as 6-by-1 slope for ditch lines. Potential flooded regions are identified by detecting areas with no LiDAR return and a recall score of 54% and 92% was achieved by the medium-grade wheel-based and vehicle-mounted portable systems, respectively.
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Couture, R., et W. Sladen. Slope movement monitoring. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2013. http://dx.doi.org/10.4095/293170.

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Stuart, N. J., et T. Vladut. Microseismic data processing associated with monitoring of mine slope instabilities. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/304938.

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Matalucci, R. V., C. Esparza-Baca et R. D. Jimenez. Characterization, monitoring, and sensor technology catalogue. Office of Scientific and Technical Information (OSTI), décembre 1995. http://dx.doi.org/10.2172/197816.

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Morang, Andrew. Cohesive Environment Site Characterization and Monitoring. Fort Belvoir, VA : Defense Technical Information Center, juin 1997. http://dx.doi.org/10.21236/ada591272.

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Schneider, T. C. Gas characterization monitoring system functional design criteria. Office of Scientific and Technical Information (OSTI), juin 1997. http://dx.doi.org/10.2172/325281.

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M A Ebadian, Ph D. REVIEW OF CURRENT PRACTICE IN CHARACTERIZATION AND MONITORING. Office of Scientific and Technical Information (OSTI), janvier 2001. http://dx.doi.org/10.2172/790966.

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Hovorka, Susan. SECARB Cranfield Site Characterization, Modeling and Monitoring Plan. Office of Scientific and Technical Information (OSTI), janvier 2008. http://dx.doi.org/10.2172/1819912.

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Kress, M. R. Long-Term Monitoring Program, Fort Benning, GA : Ecosystem Characterization and Monitoring Initiative, Version 2.1. Fort Belvoir, VA : Defense Technical Information Center, août 2001. http://dx.doi.org/10.21236/ada396328.

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Gee, Glendon W., Anderson L. Ward, James B. Sisson, Joel M. Hubbell, David A. Myers et Harold A. Sydnor. Hydrologic Characterization Using Vadose Zone Monitoring Tools : Status Report. Office of Scientific and Technical Information (OSTI), février 2003. http://dx.doi.org/10.2172/15010103.

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