Dissertations / Theses on the topic '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/.
Full textThe 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.
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.
Full textLi, Aiguo, and 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.
Full textMomand, Farid A. "Monitoring Slope Stability Problems Utilizing Electrical and Optical TDR." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1289317906.
Full textSmith, Alister. "Quantification of slope deformation behaviour using acoustic emission monitoring." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/18593.
Full textMologni, Omar. "Cable tensile force monitoring in steep slope forest operations." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3426820.
Full textForward, 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.
Full textForward, 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.
Full textResults 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.
Logan, Kenneth Scott. "Analysis of Wireless Tiltmeters for Ground Stability Monitoring." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/32009.
Full textMaster of Science
Chandarana, Upasna Piyush, and Upasna Piyush Chandarana. "Optimizing Geotechnical Risk Management Analysis." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/625550.
Full textBell, Andrew D. F. "Spatial analysis approaches for the characterisation and monitoring of slope instability and deformation." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.676269.
Full textHu, Hui [Verfasser]. "Deformation monitoring and modeling based on LiDAR data for slope stability assessment / Hui Hu." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2013. http://d-nb.info/103710689X/34.
Full textDuan, Hongmei. "Monitoring and characterization of toxic cyanobacterial blooms." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66915.
Full textUn suivi de la dynamique des populations de Microcystis qui ont la capacité de produire des toxines a été effectué à la baie Missisquoi (partie canadienne du lac Champlain) à l'aide d'outils moléculaires. Deux types de membranes ont été utilisés : un filtre standard (GF/C) pour quantifier les microcystines, et un filtre pour capturer les bactéries. Cette étude a démontré que le filtre standard (GF/C) est approprié pour déterminer les concentrations de microcystines, mais qu'il n'est pas adéquat pour caractériser avec des techniques moléculaires, les populations de bactéries et de cyanobactéries. Une bonne corrélation a été obtenue en 2006, entre les concentrations de microcystines déterminées par les méthodes ELISA et HPLC et le nombre de copies du gène mcyD (impliqué dans la biosynthèse des microcystines). Les résultats ont donc démontré le potentiel de cette méthode de PCR en temps réel, ciblant le gène mcyD, pour la détection et le suivi des proliférations de cyanobactéries qui produisent des toxines. La présence du pathogène fécal Escherichia coli a été évaluée afin de déterminer la relation entre l'application de lisier et de fumier et l'augmentation dans l'eau du lac, des nutriments qui causent les proliférations. Une bonne corrélation a été obtenue entre l'application du lisier et du fumier et les précipitations ainsi qu'entre les concentrations élevées d'azote dans le lac, suggérant qu'une meilleure gestion des matières fertilisantes est nécessaire pour réduire les apports de nutriments dans la baie Missisquoi.
Codeglia, Daniela. "Development of an acoustic emission waveguide-based system for monitoring of rock slope deformation mechanisms." Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/33500.
Full textEbel, Brian A. "Process-based characterization of near-surface hydrologic response and hydrologically driven slope instability /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
Full textNelson, Craig V. "Sedimentological and Foraminiferal Characterization of a Holocene Island Slope (130-240m), North Jamaica." DigitalCommons@USU, 1986. https://digitalcommons.usu.edu/etd/6687.
Full textPeck, Jonathan Philip. "Application of drill monitoring to rock mass characterization." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65440.
Full textUreel, Scott Daniel. "Concepts Used to Analyze and Determine Rock Slope Stability for Mining & Civil Engineering Applications." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/325211.
Full textHayati, Noorlaila [Verfasser], Wolfgang [Akademischer Betreuer] Niemeier, and Uwe [Akademischer Betreuer] Sörgel. "Slope Movement Monitoring of The Ciloto Landslides Area Using InSAR Techniques / Noorlaila Hayati ; Wolfgang Niemeier, Uwe Sörgel." Braunschweig : Technische Universität Braunschweig, 2020. http://d-nb.info/1205461973/34.
Full textHayati, Noorlaila Verfasser], Wolfgang [Akademischer Betreuer] [Niemeier, and Uwe [Akademischer Betreuer] Sörgel. "Slope Movement Monitoring of The Ciloto Landslides Area Using InSAR Techniques / Noorlaila Hayati ; Wolfgang Niemeier, Uwe Sörgel." Braunschweig : Technische Universität Braunschweig, 2020. http://d-nb.info/1205461973/34.
Full textSun, Zandong. "Seismic methods for heavy oil reservoir monitoring and characterization." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0033/NQ38510.pdf.
Full textMandadi, Bharath Kumar Reddy. "Advanced Object Characterization and Monitoring Techniques Using Polarimetric Imaging." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1243780947.
Full textSchettler, Megan Elizabeth. "Characterization of water movement in a reconstructed slope in Keokuk, Iowa, using advanced geophysical techniques." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/2624.
Full textHölck, Teuber Carlos Javier. "Open pit geomechanics and mine planning integration: design & economic assessment of a subsurface slope deformation monitoring campaign." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/141034.
Full textLa geomecánica y planificación minera son áreas de la minería a cielo abierto íntimamente relacionadas, ya que las restricciones geomecánicas limitan al diseño minero y, así, los planes mineros factibles. El diseño y los planes mineros han de empujar los límites de lo que la geomecánica permite, para asegurar operaciones mineras competitivas y mantener un nivel de riesgo al personal y operaciones aceptable. Luego, se requiere del monitoreo geotécnico para adquirir datos de calidad que permitan un diseño minero de alto nivel. Sin embargo, la relación entre geomecánica y planificación minera no se extiende al diseño e implementación de programas de monitoreo. En general, los programas de monitoreo de deformaciones superficiales son diseñados con posterioridad al inicio de la operación del rajo y cuando se han identificado signos de inestabilidad en la superficie de los taludes. El monitoreo de deformaciones del subsuelo permite alertar sobre fallas en desarrollo semanas antes de que estas se hagan notar en superficie. Luego, se debería diseñar campañas de monitoreo de deformaciones del subsuelo durante el proceso de planificación minera, considerando el diseño minero en la instalación de instrumentos geotécnicos previo a la construcción de la mina. Lo que permitiría registrar el proceso de relajación del macizo a medida que la construcción progresa y adquirir datos más exhaustivos del comportamiento del macizo rocoso (antes que con monitoreo superficial), con el fin de optimizar el diseño de taludes futuros y adoptar medidas correctivas para evitar fallas. En esta tesis, fueron diseñadas una serie de campañas de monitoreo de deformaciones del subsuelo usando In-Place Inclinometers, ShapeAccelArrays y Networked Smart Markers (NSMs) como equipos de monitoreo. Las opciones fueron aplicadas a una mina teórica desarrollada como parte de la tesis y comparadas en términos de costos, cantidad y calidad de los datos recopilados. Los resultados indican a la opción de NSMs cada 2[m] como la más eficiente en cuanto a costos ya que: (1) presenta el menor costo por unidad de datos adquiridos (US$57.21) y (2) 5 veces mayor vida útil, lo que permitiría obtener el doble de datos que la siguiente mejor opción, (3) se financia con un aumento de 2° en el ángulo de talud y (4) aumenta el VAN del proyecto en 3.2%.
Open pit geomechanics and mine planning are two closely related areas in the development of an open pit mine since geotechnical constrains limit the possible mine designs and, thus, the feasible mine plans. Mine designs and plans have to push the limits of what rock mass geomechanics allow to assure competitive mine operations, while maintaining acceptable levels of risk to operations and personnel. Therefore, geotechnical monitoring programs are required to acquire good quality data to be used as input for mine design. However, the relation between geomechanics and mine planning does not extend to monitoring programs design and implementation. Generally, surface deformation monitoring programs are designed after the project is in operation and signs of slope instability have been identified on the surface. Subsurface deformation monitoring can alert about developing failures weeks before any sign of instability is noted on the surface. Therefore, subsurface deformation monitoring campaigns should be designed along the mine planning process and considering the mine s design to install geotechnical instrumentation prior to the construction of the slopes. This methodology would allow to register the rock mass relaxation process as construction progresses and to acquire more comprehensive data about rock mass behaviour, in advanced of surface monitoring, towards future slope design optimization and adoption of remedial measurements to avoid failure. In this thesis, a series of subsurface deformation monitoring campaign were designed using In-Place Inclinometers, ShapeAccelArrays and Networked Smart Markers as monitoring devices. All options were applied to a theoretical open pit developed as part of this work. The campaigns were compared in terms of cost, quantity and quality of gathered data. The results showed that the campaign using NSMs installed every 2 meters was the most cost-efficient option as it represented: (1) the lowest cost per unit of gathered data (US$57.21), (2) five times longer lifespan, which allowed to gather twofold the amount of data compared with the next best option, (3) be financing of the campaign through steepening of the slopes by 2° and (4) increase in project s original NPV by 3.2%.
Abancó, i. Martínez de Arenzana Clàudia. "Monitoring and geomorphologic characterization of debris flows at catchment scale." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/128677.
Full textPhilipps, Joseph Caleb. "Sensor characterization for long-term remote monitoring of bridge piers." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4907.
Full textThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 2, 2008) Includes bibliographical references.
Woodruff, Olivia P. "TEMPORAL AND SPATIAL CHARACTERIZATION OF MACONDO 252 SIGNATURES IN GULF OF MEXICO SHELF AND SLOPE SEDIMENTS." UKnowledge, 2014. http://uknowledge.uky.edu/ees_etds/17.
Full textGonzalez, Ignacio. "Application of monitoring to dynamic characterization and damage detection in bridges." Doctoral thesis, KTH, Bro- och stålbyggnad, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-150804.
Full textQC 20140910
Su, Hao-Wei. "Electrical characterization of leukocyte activation for monitoring sepsis progression using dielectrophoresis." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/103742.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 113-118).
This thesis describes the development of a rapid dielectrophoretic characterization tool for monitoring leukocyte activation, and its application for monitoring sepsis progression. Sepsis is an uncontrolled activation of the immune system that causes an excessive inflammatory response or an impaired immunity. The unpredictable immune status makes the immunotherapy treatment difficult. One crucial aspect of sepsis is leukocyte activation, which plays an important role in the attacking the pathogens, stimulating the tissues, and resulting in organ function failures. Monitoring leukocyte activation in sepsis may provide real-time indicators for diagnosis, prognosis, and guiding therapy. To measure leukocyte activation, we used Iso-dielectric Separation (IDS) and dielectrohporetic spring (DEP spring) method which can rapid characterize of thousands of cells to provide statistically meaningful results. To adapt to measuring septic blood with clumpy and sticky leukocytes, the double-sided electrodes was developed and characterized for higher throughput and anti-fouling measurement. The human neutrophils were successfully isolated and activated with chemicals and their electrical properties were measured across many conditions and compared to the non-activated ones. We found repeatable and consistent electrical changes using both IDS and DEP spring method: an increase in effective conductivity of activated neutrophils at higher frequencies (above 5MHz). We then developed an electrical model and an experiment pipeline of inhibiting neutrophil functions to hypothesize the underlying mechanism. Using the blood samples from a cecal-ligation and puncture (CLP) model of sepsis in mice, we estimated the number of activated leukocytes by looking into the difference in electrical properties at 10 MHz. We found that the activated leukocyte percentage correlated with the neutrophil activation percentage obtained from flow cytometry, indicating potential use for monitoring sepsis progression. We designed a multi-parametric time series experiment to understand the prognostic value of leukocyte activation and the role of leukocyte activation in sepsis at a system level. We found that the neutrophil activation percentage of non-survivors were significantly larger than survivors at 24 hours after the CLP procedure. We also found the neutrophil activation percentage positively correlates with inflammatory cytokine interleukin-6 and interleukin-10. Finally, we initiated a pilot study of monitoring neutrophil activation in critically-ill human patients with suspected sepsis. We found, with a limited dataset, the effective conductivity of neutrophils in critically-ill human patients is higher than the healthy control. To show the feasibility of becoming an point-of-care bedside device, the sample preparation of red blood cell removal was integrated in for rapid test that can profile >1,000 leukocytes within 15 minutes from sample to result, providing a simple assay to monitor leukocyte activation in sepsis progression.
by Hao-Wei Su.
Ph. D.
Hensley, Sarah (Sarah L. ). "Characterization of monitoring alarms in a community hospital intensive care unit." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119844.
Full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 71-73).
Because the vast majority of monitoring alarms in the adult intensive care unit (ICU) do not require intervention, care providers are slow to respond to all alarms, endangering patients. We collect, characterize, and analyze alarms, alarm annotations provided by clinical staff while responding to alarms, and physiological data from a community hospital ICU. In order to suggest opportunities for suppressing irrelevant alarms, we examine monitoring device coverage across patients and analyze the alarms observed by device, priority, and type. On average, we observe 196.3 alarms per patient-day, for a total of 23,057 alarms. From these, the electrocardiogram and pulse plethysmogram produce 86.1% of all alarms. The lowest priority alarms represent 81.1% of all alarms, while the highest priority alarms compose just 5.5% of the total. While the rate of annotations is low, also just 5.5% of possible alarms, it is comparable to the rate of care provider interactions with alarms, as measured by alarm silencing, at 9.6%. Using these annotations, we find -- surprisingly -- that the annotated nuisance threshold-violation alarms tend to have higher excursions than actionable and advisory alarms, offering a statistic for separation. When focusing on threshold-crossing alarms, we find that 22.5% of Heart Rate Low alarms may actually indicate device error. Among ST segment alarms, 44.4% occur simultaneously with at least one other ST segment alarm, producing redundant alarms. Addressing these issues represent strategies for reducing excessive alarms in this community hospital cohort of ICU patients.
by Sarah Hensley.
M. Eng.
Sergienko, Ekaterina. "Adapted reservoir characterization for monitoring and uncertainty analysis of CO2 storage." Toulouse 3, 2012. http://thesesups.ups-tlse.fr/2019/.
Full textRisk analysis of CO2 geological storage involves the simulation of the dynamics of the storage process and the evaluation of the probability of the possible leakage events. The approach followed here focuses on Gaussian Process response surface modelling in order to reduce the number of calls to the expensive reservoir simulator. Three major problems related to uncertainty analysis of CO2 storage are addressed: 1. Injection well placement 2. Reliability estimation 3. Reliability sensitivity analysis To tackle the first problem we provide a response surface method to handle discrete parameters (well positions) and discrete functional outputs to treat responses varying trough time (reservoir pressure evolutions). In addition, we introduce a new method for modelling functional outputs based on curves characterization and involving shape invariant model. To address the reliability problem, we introduce a subset simulation algorithm linked with the Gaussian Process model. It involves adaptive experimental design refinement and the model updating. To solve the last problem we suggest a new method for reliability sensitivity analysis. It is based on a perturbation of a probability distribution of input variables in order to evaluate which one contributes the most in the variability of the failure probability. All the proposed methods have been numerically tested on analytical and CO2 storage examples
Jones, Barbara Wadsworth. "BEHAVIORAL GAIT CHANGE CHARACTERIZATION AND DETECTION USING PRECISION DAIRY MONITORING TECHNOLOGIES." UKnowledge, 2017. http://uknowledge.uky.edu/animalsci_etds/75.
Full textRuso, Simona. "Stratigraphic Architecture and Characterization of a Neoproterozoic Continental Slope System, Windermere Supergroup, East-Central British Columbia, Canada." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42660.
Full textDimmerling, Paul James. "Characterization of wound monitoring systems used to quantify and locate plutonium contamination." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2524.
Full textAbu-Khader, Ahmad. "Monitoring and characterization of T-lymphocyte reconstitution after allogeneic stem cell transplantation." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980393892.
Full textLo, Yuan Chang, and 羅元彰. "The Study of Slope Monitoring System." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/95667183538369720568.
Full text聖約翰科技大學
電子工程系碩士班
101
This literature described a new system to detect soil erosion by using a Micro Control Unit (MCU) combined with accelerated G-sensor and electronic compass sensor as the detection point where the sensors were placed at the edge of the slope. The sensors detect changes in the angle bearings and azimuths of the slope. Data collected at the detection point will then be calculated by MCU via RS485 and Zigbee. Results obtained by the receiver will get integrated and stored into the Embedded system. Through the Internet, these data will be incorporated into the website to be analyzed instantly. The receiver software utilized Visual C# to establish automated detection system. If something out of the norm happened, the system will then signal the rest of the sensors to transmit the data collected at the respective detection point at once. This helps to improve pre-warning efficiency, which in turn decreases human casualties and property losses caused by soil erosion.
DOTTA, GIULIA. "Semi-automatic analysis of landslide spatio-temporal evolution." Doctoral thesis, 2017. http://hdl.handle.net/2158/1076767.
Full textOsasan, Kayode Stephen. "Open-cast mine slope deformation and failure mechanisms interpreted from slope radar monitoring." Thesis, 2013. http://hdl.handle.net/10539/12867.
Full textGONG, GUAN-YU, and 龔冠宇. "The Study of Monitoring Real-Time of Slope Displacement by Photographic Monitoring." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/5d9jzz.
Full text國立高雄應用科技大學
土木工程與防災科技研究所
105
The slope areas in Taiwan often cause disasters due to nature factors. Through the real-time monitoring could prevent and reduce the damage. The disaster usually happened in a sudden, therefore, how to obtain the actual scene has been an important issue. Among the methods of slope monitoring, photogrammetry has higher flexibility and lower cost. Photogrammetry normally function by cameras capturing high-resolution images and providing high-precision terrain data. However, regular shooting by using cameras couldn’t achieve long-term slopes monitoring. A single camera only presents two-dimensional images, even though the image could be immediately viewing. To allow the camera obtaining the information and status, here in the experiment we will discuss how to set up multiple cameras and establish the best three-dimensional point cloud. This study has developed a set of monitor system to solve the problem above. The study showed the practicality of this system in indoor simulation testing area. Plus, the system would be transferred to the testing area, and completed the pre-operation requirements of cameras. From terms of monitoring experiment, the study select the data of 4th Jun,2017 to analyze the rainfall changing of soil surface in the testing area. By using the point cloud modeling, the study calculated the changing of displacement and slope profile in the testing area.
Mphathiwa, Naani. "Design principles for a survey slope monitoring system." Thesis, 2012. http://hdl.handle.net/10539/11712.
Full textMendes, Filipe Peixoto. "Cost-effective robot for steep slope crops monitoring." Master's thesis, 2019. https://hdl.handle.net/10216/122398.
Full textMen-YingWang and 王曼穎. "The Monitoring and Analysis of Unsaturated Soil Slope." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/45736962207710265088.
Full text國立成功大學
土木工程學系碩博士班
100
In this study, two shallow slope sites had been chosen at Tai-20, to install the monitoring equipment. The soil tensiometer, soil moisture sensor, rain gauge, and inclinometer were installed in these sites. The monitoring data was collected, and the sensors were checked monthly. The relationship of matric suction and volumetric water content can be fit the soil water characteristic curve by the numerical software, MATLAB, in this study. The finite element analysis program, ABAQUS, is used for seepage and stability analysis of the unsaturated slope using the soil water characteristic curve. The fitting result of the relationship between the matric suction and volumetric water content is well agreement with four difference soil water characteristic curve models. Both the numerical analysis and monitoring results show that the volumetric water content of the shallow slopes increased, and the matric suction of shallow slope decreased significantly after rainfalls. The matric suction gradually recovered after cessation of rainfalls. Sliding of the shallow slope begins to occur when the matric suction is decreasing. The monitoring system and the numerical analysis are able to interpret the behavior of the shallow slope after rainfalls.
Doo, Gee-chau, and 杜居巢. "A Study on Monitoring and Interpretation of Slope Movements." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/93247749037940574714.
Full text國立雲林科技大學
營建工程系碩士班
91
In-situ ground monitoring technique has been used frequently as a direct means for examining the stability of slopes. Ground monitoring activities usually collect a large volume of data of various kinds, which may require special cares in the interpretation of the results. The study herein discusses an example of the interpretation from a long-term ground-monitoring program. The monitoring program has been carried out since March of 2000, in an area located between mileages 28K+900 and 31K+500 along the Province Road 18 (or called Mt. Ali Road). The study discusses the results of inclinometer data based on individual displacements in A and B directions, overall displacements and their azimuths, as well as the possible distortions of the inclinometer tubes. With careful examinations on local variations in the direction and magnitude of the recorded ground deformations, the results appeared to provide a better interpretation on the stratification of material layers and the location of slip surfaces. By comparing with the results of on-site reconnaissance, the study found the source erosion of the south tributary of Doo-zuo Creek along the slope toe has a significantly detrimental effect on the stability of slopes in the study area. Based on on-site situations, the study has set up a device to simulate the deformation of inclinometer tubing within soil strata. The indoor simulation testing was used to examine the magnitude and direction of lateral displacement of soil strata, as well as the distortion of inclinometer tubing. The results of the simulation verified the patterns of measurement on-site, and would provide a basis for interpretation of slope movements from inclinometer data.
Yeh, Chih-Hsiang, and 葉致翔. "An Automatic Information System for Slope Monitoring Using TDR." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/21364067610678374090.
Full text國立交通大學
土木工程系
91
Recently the role which Geotechnical Monitoring System play becomes important gradually in construction business and the capability of slope monitoring sensors are developed and improved with the progression of science and technology. The available traditional instruments are mostly based on electronic sensors and generate digital signals which are certainly capable for automatic motoring. But the automation of tradition instruments is seldom applied due to its high cost and unstable. By using TDR technology, the goals in this reach are to improve the disadvantages and promote the application of automatic monitoring system. TDR (Time Domain Reflectometry) monitoring technology can not only solve the problems of current slope monitoring system, but also reduce the cost greatly. TDR device is an electronic machine which can generate one dimension electromagnetic wave. The principles of discontinuous isolating medium and discontinuous geometric interface are applied on slope monitoring engineering. The research is divided by three parts, Data acquisition, Data process, and Networking service respectively. First part of this research, Campbell’s product named “CR10X” is used for collecting TDR raw data and a modem is adopted as remote connection. Second part, a Java program is established for data process and it is the core in this monitoring system. The primary task of this part is to parse monitoring data to database and backup raw data simultaneously. The third part, according to the characteristics of networking, the connection between the main server and client terminals on the internet is desired to be constructed. The main mission of the connection is to access the monitoring system for purposes anytime and anywhere. Conclusively, this study hopes to improve current slope monitoring technology and to reach the state of complete automation.
Po-YaoHuang and 黃柏堯. "The Installation of Landslide Monitoring of Unsaturated Soil Slope." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/98376737170657186157.
Full textHsiao, Cheng-Hsi, and 蕭承熙. "Development of Wireless Alarm Modules to Railway Slope Monitoring." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/tjpe48.
Full text國立臺灣大學
土木工程學研究所
106
Rock fall is a common geo-disaster that threatens people’s properties and lives in Taiwan. For the sake of train safety, a rock fall protection fence, named ultra-light fence, was built along a slope where a railway track is passing by. Sensors with on-board gyroscope and accelerometer were installed and placed on the posts of the fence to record the tilt angle of the rock fall protection fence. The data were analyzed and uploaded to Internet in real time, and applied in websites and Apps. When the data reaches the threshold, alarm signals will be sent out in terms of light, sound, and text message, etc.
Chen, Jie-Wen, and 陳玠文. "A Study on Mechanism of Slide through Slope Monitoring System." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/13178142926508617895.
Full text國立雲林科技大學
營建工程系碩士班
89
A Study on Mechanism of Slide through Slope Monitoring System Taiwan is located in the conjunction area between Eurasia Plate and Philippine Sea Plate. As a result, the geology condition of the island is complex and the earthquake activity is frequent. In addition, Taiwan is subjected to a great amount of rainfalls each year; most of them are concentrated in the summer season. Due to the inherited reasons as well as other human factors, the hill slopes in the island are vulnerable and landslide incidents occurred occasionally. Despite the causes may be complicated, it is worthwhile to study the mechanism and the inter-related factors of any potential landslides by the installation of proper monitoring measures. Once the mechanism can be fully understood, a simple and practical warning system can be set up and unnecessary losses can be mitigated. Typhoon Herbert swept the entire island and brought abundance of rainfalls at the end of July 1996. During that time, significant landslides occurred in a hilly area (50 ha), called “Woo-Wan-Tzai” of Chiai County, which had caused lots of subsidence and cracks of a local main traffic artery, Province Road No.18, between the mileage 28K+900 and 31K+500. The study has initiated since the beginning of 2000 by installing several slope monitoring equipment and providing persistent monitoring of ground movements, groundwater conditions and rainfalls. With the aid of theoretical analysis and laboratory testing, the study found the relation between the slope movements and the rainfall, as well as the groundwater conditions are intimated. The monitoring results showed the natural creep of the hill slopes can be up to 0.015-0.400 mm/day, with no obvious rainfall being recorded. If slope movement increases noticeably, the required accumulated rainfall should be at least about 100-270mm. The study concluded the mechanism of slide for the mid and southern slopes was attributed to the infiltration of rainfall, which tended to increase the driving force and soften the shear resistance of the sliding mass due to soaking. In addition, the increase of groundwater level further decreased the effective stress and hence the shearing resistance along the sliding surface. However, rainfall had less effects on the fluctuation of groundwater lever in the northern slopes. The movements of these slopes were mainly due to the increase of driving weight and the softening of shear resistance of sliding mass as the results of rain water infiltration.
Thomas, Huw Gareth. "Slope stability prism monitoring: a guide for practising mine surveyors." Thesis, 2011. http://hdl.handle.net/10539/10456.
Full textLi, Chia-Ming, and 李嘉銘. "The Study on Slope Slip Monitoring by Continual Close-Range Image." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/31318061684675166037.
Full text逢甲大學
環境資訊科技碩士學位學程
97
This road in Taiwan mountainous area, slope slip can directly affect the driving security. In this research, we use establish the CCD camera to do continuously photograph make mountainous area road slope monitoring in the road slope high place position, mainly selects the method which the single camera continuously photographs to do fast continuously obtains the image material. Retrieve the different time two images bigger differences quantity in the image which the single camera continuously photographs, uses the "time-base-line-parallax" to get the difference quantity in the different time, and automatically detects the image difference eigenvalue. Considered that the camera possibly has the inclined situation, is distinguishes the camera incline situation by the space resection. And discusses between its different because of the control point the geometry relations, calculates tendency of the side slope glide. In this research, designs the image slope slip monitoring system, we hoped can achieve approaches request which near realtime cognoscible, provides using of the mountainous area slope slip monitoring.
Yu, Tzu-Ming, and 余子鳴. "Monitoring Technology Automation and Permeability Measurement of Unsaturated Colluvium Soil Slope." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/19062632237243579074.
Full text國立臺灣科技大學
營建工程系
98
In Taiwan, the reservoir watersheds are often located in a high rainfall intensity region where the colluvium soil slope is weak and unstable. Landslide takes place frequently in such geology conditions. Therefore, preventing the landslide is worthy of further study. Using an automatic monitoring system is an essential method to assess the slope condition and provide early warning. The colluvium soil is usually unsaturated and locates above the groundwater table. This study adopts the Guelph permeameter to measure the permeability of colluvium soils that located on a slope nearby the Shihmen reservoir. In addition, the rainfall intensity in this region is monitored to study the relationship between the rainfall data and soil hydraulic conductivity. Further, the matric suction of unsaturated soil is evaluated by a monitoring system. A series of tests were conducted to evaluate the operational characteristics of the system. The advantages and shortcomings of each monitor device are then discussed. The results indicate that the hydraulic conductivity of the unsaturated colluvium soil varies at various rainfall intensities. In addition, this conductivity and the field water content are closely related. Systematic measurement indicates that the length of the transmission line also affects the noise of electronic signals. Moreover, the tensiometer and water mark used for measuring the matric suction of the soil exhibit different behavior at different soil water contents. At low water content or for dry soil, the porous ceramic probe of tensiometer becomes unsaturated and then malfunctioned. The water mark system does not encounter this problem. On the other hand, at high soil water content the water mark cannot correctly measure the matric suction. The tensiometer, in contrast, can clearly indicate its variations.