Дисертації з теми "Subgrade soils"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Subgrade soils".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Sekulovic, Dejan. "Identification of modulus of subgrade reaction of soils at pile/soil interface." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0015/MQ52659.pdf.
Повний текст джерелаOrman, Marc Elliot 1958. "A study of bedding intrustion into low strength subgrade." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/558102.
Повний текст джерелаHan, Zhong. "Modelling Stiffness and Shear Strength of Compacted Subgrade Soils." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35059.
Повний текст джерелаMao, Baimin. "Predicting resilient modulus of highway subgrade soils in Ohio." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1179257407.
Повний текст джерелаParker, John Wesley. "Evaluation of Laboratory Durability Tests for Stabilized Subgrade Soils." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2393.pdf.
Повний текст джерелаLee, Jangguen. "The Behavior of Pore Water Pressure in Cohesive Subgrade Soils." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1364216774.
Повний текст джерелаOuf, Mohamed El-Sadek Abdel Rahman. "Stabilisation of clay subgrade soils using ground granulated blastfurnace slag." Thesis, University of Leeds, 2001. http://etheses.whiterose.ac.uk/327/.
Повний текст джерелаRasul, Jabar. "Investigating the use of stabilized subgrade soils for road pavements in Kurdistan." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6819/.
Повний текст джерелаKim, Dong-Gyou. "Engineering properties affecting the resilient modulus of fine-grained soils as subgrade." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1298905282.
Повний текст джерелаIka, Putra Agus. "Stabilisation of expansive subgrade soils with slag and cement for road construction." Thesis, Curtin University, 2014. http://hdl.handle.net/20.500.11937/374.
Повний текст джерелаDavies, Beresford O. A. "A model for the prediction of subgrade soil resilient modulus for flexible-pavement design : influence of moisture content and climate change /." See Full Text at OhioLINK ETD Center (Requires Adobe Acrobat Reader for viewing), 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=toledo1102690606.
Повний текст джерелаTypescript. "A thesis [submitted] as partial fulfillment of the requirements of the Master of Science degree in Civil Engineering." Bibliography: leaves 80-83.
Kim, Dong-Gyou. "Development of a constitutive model for resilient modulus of cohesive soils." The Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1078246971.
Повний текст джерелаGu, Huanda. "Environmental Geotechnical Approach on the Application of Ferrum-Series Lime Stabilized Soils to Road Base and Subgrade." Kyoto University, 1998. http://hdl.handle.net/2433/182351.
Повний текст джерелаVizcarra, S., S. Vizcarra, I. Lujan, M. Soto, and G. Durán. "Experimental analysis of the addition of rice husk ash to the clayey subgrade of a road stabilized with lime." Institute of Physics Publishing, 2020. http://hdl.handle.net/10757/651791.
Повний текст джерелаSaarenketo, T. (Timo). "Electrical properties of road materials and subgrade soils and the use of Ground Penetrating Radar in traffic infrastructure surveys." Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:9514282221.
Повний текст джерелаCekinmez, Zeynep. "Effect Of Foundation Rigidity On Contact Stress Distribution In Soils With Variable Strength / Deformation Properties." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12611478/index.pdf.
Повний текст джерелаDong, K., D. P. Connolly, O. Laghrouche, P. K. Woodward, and Costa P. Alves. "The stiffening of soft soils on railway lines." Elsevier, 2018. https://publish.fid-move.qucosa.de/id/qucosa%3A73234.
Повний текст джерелаFerreira, Carla de Castro. "Aspectos do coeficiente de recalque de solos da formação Guabirotuba." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-02032016-141913/.
Повний текст джерелаThe present work employs a data base of plate load tests (performed according the ABNT-NBR-6489 and ASTM-D-1196 procedures) in soils of the Guabirotuba Formation, important geological unit of Curitiba metropolitan region. The purpose of the work is the improving of the knowledge of these soils related to their behavior as subgrade for rigid industrial pavements. It is provided a revision about pavements foundation models, geological and geotechnical aspects of the Guabirotuba Formation and methods of the determination of the modulus of subgrade reaction. The analysis is based on the modulus of subgrade reaction \"k\" from 32 plate loading tests and uses a practical classification of the soils, according to their weathering level: intact gray clays, lateritic red clays and weathered variagate clays that showed a derease of the modulus in this order. Some correlations were found to predict fair values of \"k\", such as those based on SPT and on DCP. It was also noticed that the values of the modulus of subgrade reaction obtained are higher than the usual recommendations of the literature. The variability and the influence of the subgrade in the final performance of the pavaments make evident the importance of the plate load tests for obtaining reliable design parameters.
Khasawneh, Mohammad Ali. "LABORATORY CHARACTERIZATION OF COHESIVE SUBGRADE MATERIALS." University of Akron / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=akron1124387175.
Повний текст джерелаGomes, Adriana Cristina. "Monitoramento de uma estrutura de contenção em estacas espaçadas considerando perfil de sucção." Universidade Federal de Goiás, 2015. http://repositorio.bc.ufg.br/tede/handle/tede/5404.
Повний текст джерелаApproved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-04-04T11:48:47Z (GMT) No. of bitstreams: 2 Dissertação - Adriana Cristina Gomes - 2015.pdf: 14045273 bytes, checksum: 9bf9ee1429dd1afc11c6d19ff58a65c7 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)
Made available in DSpace on 2016-04-04T11:48:47Z (GMT). No. of bitstreams: 2 Dissertação - Adriana Cristina Gomes - 2015.pdf: 14045273 bytes, checksum: 9bf9ee1429dd1afc11c6d19ff58a65c7 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2015-08-14
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
This study presents the results of an extensive field monitoring program in which the lateral displacements of a nail reinforced sheet pile wall in Goiânia, Brazil were measured during the excavation process. The instrumentation methods adopted were multiple point borehole extensometers (MPBX) and optical surveying. The MPBX showed good results that could be appropriately interpreted as the excavation progressed. However, the measurements of optical surveying were not reliable due the low precision of total station and for being highly affected by user’s errors. In order to determine the geotechnical profile, laboratory test were undertaken to obtain strength and deformation parameters for unsaturated and saturated soil conditions. The large variability of the soil, observed in terms of void ratio, presented an important obstacle, making the determination of representative shear strength parameters a challenge. As a way to bridge the analysis of field monitoring results, soil properties and the numerical back analyses of the retaining walls, the water content profile and the soil-water characteristic curve were measured. Such data was used to obtain the suction profile and evaluated its influence in the monitored field data. Finally, the numerical code Sheeting Check (Geo5), which uses the beam on elastic foundation method, was employed to obtain the soil subgrade reaction modulus (ks) and determine the retaining wall deformation profile and earth pressures in saturated and unsaturated soil condition. The maximum lateral displacements values found in the numerical back analyses were compatible with the monitoring results. Besides, the influence of unsaturated soil conditions and soil suction in the reduction of the retaining wall deformations and the active earth pressures were observed.
Este estudo apresenta resultados de um extenso monitoramento de deslocamentos horizontais de uma estrutura de contenção em estacas espaçadas com tirantes passivos na cidade de Goiânia, Brasil que foram medidas durante o processo de escavação. Os métodos de instrumentação adotados foram de extensômetros de hastes horizontais múltiplas (EHHM) e medições topográficas. O EHHM apresentou bons resultados que permitiu interpretar corretamente o progresso da escavação. Todavia, as medições topográficas não foram confiáveis devido à baixa precisão da Estação Total e sendo bastante afetados por erros do usuário. Para determinar o perfil geotécnico do solo, ensaios em laboratório foram realizados para obter parâmetros de resistência e deformabilidade para o solo na condição natural e saturada. A grande variabilidade do solo, observada em termos de índice de vazios, se apresenta como importante obstáculo, tornando a determinação representativa dos parâmetros de resistência ao cisalhamento um desafio. Buscando acoplar as análises dos resultados de monitoramento em campo, propriedades do solo e retro análises da estrutura de contenção, o perfil de umidade e a curva característica solo-água foram medidos. Esses dados foram utilizados para obter o perfil de sucção do solo e avaliar sua influência nos dados monitorados em campo. Por fim, a ferramenta numérica Shetting Check (Geo5), que aplica o método de viga apoiada sobre base elástica, foi utilizada para obter o módulo de reação do solo (ks) e avaliar o comportamento do perfil de deformação da parede de contenção e do empuxo de terra para o solo na condição saturada e não saturado. Os valores de deslocamentos horizontais máximos obtidos a partir da retro análise apresentam-se compatíveis com valores da literatura. Além disso, a influência da sucção na redução da deformação da parede de contenção e dos empuxos ativos foi observada.
Veisi, Maryam. "Accelerated mix design of stabilized subgrades." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2008. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.
Повний текст джерелаGlatz, Thomas. "The electro-osmotic acceleration of infiltration into the subgrade of pavements." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16326.
Повний текст джерелаENGLISH ABSTRACT: The moisture content of road foundations plays an important role in the durability of the pavement and the driving comfort of the road. After a pavement has been completed, gradual moisture changes occur in the foundations until equilibrium conditions can be reached, and this can have negative results if expansive clays, for example, are present in the foundation. Pre-wetting of the foundation material is seen as a method to minimilize moisture changes after construction, but if the pavement was already completed, it would be very difficult to change or alter the moisture content in the foundation, because water could then only be applied to the shoulder areas of the road and horizontal infiltration in the soil is exceptionally slow. The research which is reported in this account was undertaken to determine whether the process of electro-osmosis could be applied to accelerate water infiltration underneath covered areas, as in, for example, road foundation layers. Electro-osmosis, if found to be successful, has various advantages, of which the most important is that it can be applied without stopping the normal operations of the road. This research was carried out on a mixture of G5 material (TRH14 classification) and fine material in the form of clay with a low plasticity. Firstly, tests were performed to determine the percentage of fines required. It was found that, if too little fines were present infiltration did not occur, because moisture could flow freely through the openings between the rough aggregate. Electro-osmosis also had no effect on the rate of flow. The allocated amount of fines required to fill sufficient openings was about 30% (TRH14 classification of mixture is G10). Free flow was stopped and true infiltration occurred. Simultaneously, the rate of infiltration could be accelerated with electro-osmosis. Furthermore, a two-dimensional model of a road was constructed with electrodes placed on both sides, with the aim to determine the infiltration pattern controlled by electro-osmosis and what the effect of the initial moisture content would be on the process. Water was introduced to the one side of the model road and the wetting of the foundation was investigated. If the electric current for electro-osmosis was switched off, the infiltration was mainly vertical, as expected, but with the current switched on, there was an obvious acceleration of infiltration in the horizontal direction. As in the case of the initial tests, it was found that electro-osmosis was not very successful to accelerate horizontal infiltration at low percentages of fines. Furthermore, it was obvious that electroosmosis was also more effective if the initial moisture content of the soil was low. Low amounts of fines and high initial moisture contents had rather the electroosmotic flow of water passing underneath the road as a result instead of infiltration acceleration, with the result that the moisture content did not change much. The research thus showed that electro-osmosis is a possible manner in which moisture could be conducted into the foundation layers of roads to increase the moisture content if the appropriate amount of fines and moisture content were present in the foundation material. Further research could still be carried out and the materials in each case should be practically evaluated before this method could be continued with.
AFRIKAANSE OPSOMMING: Die voginhoud van padfondamente speel ’n belangrike rol in die duursaamheid van die plaveisel en die rygerief van die pad. Nadat ’n plaveisel voltooi is, vind daar geleidelike vogverandering in die fondamente plaas totdat ewewigstoestande bereik is, en dit kan nadelige gevolge inhou indien uitsettende kleie byvoorbeeld in die fundament teenwoordig is. Voorafbenatting van die fondamentmateriaal word gereken as ’n metode om vogveranderinge na konstruksie te minimeer, maar indien die plaveisel reeds voltooi is, is dit baie moeilik om die voginhoud in die fondament te verander of beheer omdat water dan slegs buite die skouerareas van die pad toegedien kan word en horisontale infiltrasie in grond uiters stadig is. Die navorsing waaroor hierin verslag gedoen word, is onderneem om te bepaal of die proses van elektro-osmose aangewend kan word om waterinfiltrasie onder bedekte areas, soos byvoorbeeld padfondamentlae, te versnel. Elektro-osmose, indien dit suksesvol blyk te wees, hou verskeie voordele in, waarvan die belangrikste dat dit aangewend kan word sonder om die normale bedryf van die pad te staak. Die ondersoek is uitgevoer op ’n mengsel van G5 materiaal (TRH14 klassifikasie) en fynstof in die vorm van klei met ’n lae plastisiteit. Eerstens is toetse uitgevoer om die persentasie fynstof wat nodig is, te bepaal. Daar is bevind dat, indien te min fynstof teenwoordig is, infiltrasie nie plaasvind nie aangesien water vryelik deur die openinge tussen die growwe aggregaat kan vloei. Elektro-osmose het ook geen effek op die vloeitempo gehad nie. Die aangewese hoeveelheid fynstof om genoegsame openinge te vul was ongeveer 30% (TRH14 klassifikasie van mengsel is G10). Vrye vloei is dan gestuit en ware infiltrasie het plaasgevind. Terselfdertyd kon die tempo van infiltrasie versnel word met elektro-osmose. Voorts is ’n twee-dimensionele model van ’n pad gebou, met elektrodes aan weerskante geplaas, met die doel om te bepaal of die infiltrasiepatroon deur elektro-osmose beheer kon word en wat die effek van beginvoginhoud op die proses sal wees. Water is aan een kant van die modelpad ingevoer en die benatting van die fondament bestudeer. Indien die elektriese stroom vir elektroosmose afgeskakel was, was die infiltrasie hoofsaaklik vertikaal, soos verwag, maar met die stroom aangeskakel was daar duidelike versnelling van infiltrasie in die horisontale rigting. Net soos in die geval van die aanvanklike toetse is bevind dat elektro-osmose nie baie suksesvol was om horisontale infiltrasie te versnel by lae persentasies fynstof nie. Dit het verder geblyk dat elektro-osmose ook meer effektief was indien die aanvanklike voginhoud van die grond laag was. Lae hoeveelhede fynstof en hoë aanvanklike voginhoude het eerder elektroosmotiese deurvloei van water onderdeur die pad tot gevolg gehad as infiltrasieversnelling, met die gevolg dat die voginhoud nie veel verander het nie. Die navorsing het dus getoon dat elektro-osmose ’n moontlike wyse is waarop water in die fondamentlae van paaie ingevoer kan word om die voginhoud te verhoog indien die geskikte hoeveelheid fynstof en voginhoud in die fondamentmateriaal teenwoordig is. Verdere navorsing kan nog uitgevoer word en die materiale van elke geval sal prakties evalueer moet word voordat met die metode voortgegaan kan word.
Freese, Kevin M. "Assessment of Sulfate in Ohio Transportation Subgrades." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1404393723.
Повний текст джерелаLoh, Beng Heng. "Behaviour of railway track subgrade under cyclic loading." Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/2100.
Повний текст джерелаGeiman, Christopher Matthew. "Stabilization of Soft Clay Subgrades in Virginia Phase I Laboratory Study." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/32499.
Повний текст джерелаMaster of Science
Yassin, Hendro. "The behaviour of beams and slabs with soffit projections supported by uniform subgrades." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278708.
Повний текст джерелаHidalgo, F., F. Hidalgo, J. Saavedra, C. Fernandez, and G. Duran. "Stabilization of clayey soil for subgrade using rice husk ash (RHA) and sugarcane bagasse ash (SCBA)." Institute of Physics Publishing, 2020. http://hdl.handle.net/10757/651798.
Повний текст джерелаŠvarcová, Monika. "Dvoufázový systém stabilizace podloží vozovek." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392147.
Повний текст джерелаAl-Jhayyish, Anwer K. "Incorporating Chemical Stabilization of the Subgrade in Pavement Design andConstruction Practices." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1405480246.
Повний текст джерелаLorenc, Daniel. "Namrzavost upravených zemin v podloží vozovky." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372244.
Повний текст джерелаMohn, Douglas M. "Impact of Gypsum Bearing Water On Soil Subgrades Stabilized With Lime or Portland Cement." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1430836216.
Повний текст джерелаDAVIES, BERESFORD OBAFEMI ARNOLD. "A MODEL FOR THE PREDICTION OF SUBGRADE SOIL RESILIENT MODULUS FOR FLEXIBLE-PAVEMENT DESIGN: INFLUENCE OF MOISTURE CONTENT AND CLIMATE CHANGE." University of Toledo / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1102690606.
Повний текст джерелаKennedy, Kalub S. "Evaluation of Chemically Stabilized Subgrades with High Sulfate Concentrations." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1554807825765069.
Повний текст джерелаCastro, M., M. Castro, J. Navarro, G. Aybar, and G. Duran. "Analysis of high plasticity clayey soil improvement at subgrade level through Portland cement added to decrease volumetric change." Institute of Physics Publishing, 2020. http://hdl.handle.net/10757/651763.
Повний текст джерелаBarnes, Glen James. "An experimental investigation on the properties and performance of geogrid and geocomposite as subgrade reinforcement in granular pavements." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/129219/2/Glen%20Barnes%20Thesis.pdf.
Повний текст джерелаKhoueiry, Nicole. "Study of granular platforms behaviour over soft subgrade reinforced by geosynthetics : Experimental and numerical approaches." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI027.
Повний текст джерелаGeosynthetics were used since 1970 in the base course reinforcement supported by soft subgrade in unpaved road application. The various factors and parameters influencing the dominant mechanism and its relative contribution on the platform improvement explain the need of more investigations in this topic. In this research work, large-scale laboratory test was developed to study the reinforcement contribution in the unpaved road improvement. Therefore, an unpaved platform was built of 600 mm of artificial subgrade supporting a base course layer. A detailed experimental Protocol was established regarding the soil preparation, the installation and the soils compaction procedure to reproduce the site conditions and insure the platform repeatability for each test. Three geosynthetics were tested first under a cyclic plate load test. Cyclic load was performed on the prepared platform, with a maximum load of 40 kN resulting in a maximum applied pressure of 560 kPa. The platform was subjected to 10,000 cycles with a frequency of 0.77 Hz. An advanced and complete soil instrumentation was provided in order to collect the maximum data needed for thorough analysis. Quality control tests were performed before each test to verify the soil layers homogeneity and properties. Two base course thicknesses were tested under this test condition, 350 and 220 mm. Once the developed protocol was confirmed under the circular plate load tests, further tests using the Simulator Accelerator of Traffic (SAT) were performed. Indeed, the laboratory prepared platform was placed in a larger box of 1.8 m in large, 5 m in length and 1.1 m in height. The prepared platform was subjected to two solicitations: a particular plate and traffic load. The Simulator Accelerator of Traffic was developed specially for this application. A machine that simulates the traffic load under an effective length of 2 m and a velocity of 4 km/h. The two areas were instrumented: the area under the circulation load, and the area under the plat load, located aside. In addition, a numerical model based on the differential element method using FLAC 3D was developed. The model simulated the circular plate load test with the same platform configuration under monotonic load. The results were compared to the first monotonic load applied on the rigid plate experimentally
Roshani, Atena. "Road infrastructure vulnerability to groundwater table variation due to sea level rise." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/74509/1/Atena_Roshani_Thesis.pdf.
Повний текст джерелаBerti, Carolina. "Avaliação da capacidade de suporte de solos "in situ" em obras viarias atraves do Cone de Penetração Dinamica : estudo experimental." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258212.
Повний текст джерелаDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
Made available in DSpace on 2018-08-06T16:48:11Z (GMT). No. of bitstreams: 1 Berti_Carolina_M.pdf: 4127695 bytes, checksum: f8e52fd73231b7c47f0a12b5c7e759cc (MD5) Previous issue date: 2005
Resumo: Esta pesquisa procurou estabelecer uma correlação entre os valores de capacidade de suporte resultantes dos ensaios CBR (Califórnia Bearing Ratio) versus DCP (Dynamic Cone Penetrometer), realizados com o solo proveniente de vias não-pavimentadas dentro do Campus da UNICAMP, situado em Campinas, São Paulo. O Cone de Penetração Dinâmica (DCP) é caracterizado como um equipamento simples, portátil e de baixo custo, cujo ensaio revela ser praticamente não-destrutivo. Com ele é possível determinar o perfil de resistência de camadas de solo compactadas ou em seu estado natural, controlar a execução de obras viárias e avaliar estruturas de pavimentos. Uma investigação do solo através de ensaios DCP e CBR conduziu ao desenvolvimento de modelos de regressão, correlacionando a capacidade de suporte obtida através de ensaios ¿in situ¿ com o auxílio do DCP, e ensaios de laboratório utilizando o ensaio de CBR e DCP. Através das informações contidas na literatura técnica, dos procedimentos experimentais efetuados e das análises de regressão realizadas, ficou evidenciado o relacionamento entre o DCP e o CBR, validando as correlações estabelecidas e propondo modelos próprios, aumentando a confiabilidade dos resultados dos ensaios DCP para avaliação da capacidade de suporte de solos
Abstract: This research establishes a correlation among the strength or supporting values of the tests: CBR (California Bearing Ratio) versus DCP (Dynamic Cone Penetrometer), accomplished with the soil originating from no-paved roads inside of the Campus of UNICAMP. The Cone of Dynamic Penetration (DCP) it is characterized as an equipment simple, portable and of low cost, whose tests reveals to be practically no-destructive. DCP test determines the profile of resistance of soil layers compacted or in your natural state, to control the execution of road buildings and to evaluate structures of pavements. An investigation of the soil through DCP and CBR tests led to the development of regression models, correlating the strength measures obtained through in-situ tests with the aid of DCP and laboratory tests using the CBR and DCP. Through the information contained in the technical literature, of the made experimental procedures and of the regression analyses accomplished, the relationship was evidenced between DCP and CBR, validating the established correlations and proposing own models, increasing the reliability of the results of the DCP tests for determining strength values of soils
Mestrado
Transportes
Mestre em Engenharia Civil
Mokeddem, Abdelhammid. "Modélisation géomécanique et probabiliste des rideaux de palplanches : prise en compte de l’interaction sol-structure et de la variabilité spatiale du sol." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0057/document.
Повний текст джерелаThe geomechanical behaviour of geotechnical structures such as sheet pile walls is subjected to epistemic uncertainties due to geomechanical models’ assumptions and also the aleatory uncertainties which could be related to the soil spatial variability. The main objective of this thesis is to gain more insight into the effect of these uncertainties on the sheet pile behaviour. To this end, this thesis focuses on four main issues: The first one is related on the one hand to the analysis of the used geomechanical hypotheses for modelling of retaining walls. On the other hand, to extend the one-dimensional subgrade reaction method which is based on a beam relying on elastoplastic supports to a two-dimensional system that call to an orthotropic plate relying on the same supports (MISS-CR-PLQ). The second issue concerns the soil spatial variability modelling. After a key comparison between two random field generation methods, we selected the Circulating Embedding method for its efficiency. Several parametric studies have been conducted to analyse the effects of different assumptions of random field generation. The third issue is related to the implementation of the proposed mechanical-reliability approach taking into account the soil spatial variability. The last issue is devoted to the application of the developed approach to a case study through probabilistic and reliability analyses. The influence of statistical parameters (e.g. correlation lengths, cross-correlation,...), mechanical and geometrical has been examined
Umlauf, Jiří. "Návrh zajištění stavební jámy hloubeného úseku tunelu na vysokorychlostní trati Brno-Přerov." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409753.
Повний текст джерелаSalour, Farhad. "Moisture Influence on Structural Behaviour of Pavements : Field and Laboratory Investigations." Doctoral thesis, KTH, Väg- och banteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-162076.
Повний текст джерелаQC 20150324
Sokolová, Veronika. "Namrzavost zemin a druhotných materiálů v podloží vozovek." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227447.
Повний текст джерелаMašek, Jakub. "Namrzavost zemin a materiálů v podloží vozovek." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226039.
Повний текст джерелаImanzadeh, Saber. "Effets des incertitudes et de la variabilité spatiale des propriétés des sols et des structures sur le dimensionnement des semelles filantes et des conduites enterrées." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00803563.
Повний текст джерелаLin, Jian-Liang, and 林建良. "Resilient Modulus of Unsaturated Cohesive Subgrade Soils." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/64692912006177736861.
Повний текст джерела國立臺灣科技大學
營建工程系
93
Subgrade often lies above the groundwater level and appear in unsaturated conditions. Its function is to bear the weight transfered down from the pavement. The subgrade can be affected by the seasonal rainfall or the detrimental road drainage system. As a result, water content of the subgrade may increase and the matric suction of the soils may decrease at the same time .The resilient modulus will be reduced because the increase of the water content. The axis-translation technique is used to control the soil suction and the water content state after road serving in order to investigate the relation between suction and the resilient modulus. This research used the MTS cyclic triaxial test system to carry out the resilient modulus tests on subgrade soils. The test results show that the main factor influencing the matric suction of subgrade, except the water content increase induced by the seasonal rainfall, is the deviator stress. The deviator stress loaded repeatedly may result in pore water pressure rises and then matric suction decreases. Test results also show that when the matric suction is relatively close to Equilibrium Moisture Content (EMC), the resilient modulus will increase with the increased matric suction.
Acosta, Hector A. "Stabilization of soft subgrade soils using fly ash." 2002. http://catalog.hathitrust.org/api/volumes/oclc/50873191.html.
Повний текст джерелаTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 120-125).
Yang, Shu-Rong, and 楊樹榮. "Behavior of unsaturated subgrade soils under repeated loading." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/13284393083991916139.
Повний текст джерела國立中央大學
土木工程研究所
93
Construction specifications generally require that subgrade soils be compacted in the field at or near optimum moisture content (OMC). As such, subgrade soils should be treated as unsaturated soils. Soil suction is a fundamental physical property of unsaturated soils, since soil suction dictates the state of stress in unsaturated soils. It was known resilient modulus model is a function of stress state. Hence, this study developed a resilient model based on deviator stress and matric suction. This study was undertaken to evaluate the variations of soil suction with the moisture content for two soils. In particular, the effects of compaction energy on soil suction were investigated. The matric suctions were determined by the filter paper method on soil specimens after the resilient modulus test. Findings from these tests indicated that soil suction of compacted soil is influenced by the compaction energy and water content. Soil suction increases with decreasing water content. However, high compaction energy does not necessarily lead to high soil suction. Test results demonstrated that resilient modulus correlates better with the matric suction than with total suction. Matirc suction was found to be a key parameter when predicting the resilient modulus of cohesive subgrade soils. Also, a prediction model incorporating deviator stress and matric suction for subgrade soil resilient modulus, called the deviator stress-matric suction model was established. Based on the response of subgrade soil under repeated loading tests, a critical stress level can be defined. At stress levels higher than the critical level, the plastic strain of subgrade soil accumulates rapidly and an unstable condition occurs, and soil tends to soften after a specific number of load applications. Using the plastic strain data obtained at stress states below the critical level, a multiple regression plastic model for cohesive subgrade soils was developed. Taking both the deviator and confining stresses into account, the model can be used to predict the permanent deformation in the subgrade of flexible pavements under repeated loading in a reasonable way.
Liao, Chih-ying, and 廖志穎. "The Wetting Effect and Shear Modulus of Unsaturated Cohesive Subgrade Soils." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/9m6gx8.
Повний текст джерела國立臺灣科技大學
營建工程系
95
The subgrade soil often lies above the groundwater level and appears in unsaturated conditions. Since the subgrade soil is affected by the seasonal rainfall or the groundwater changes, the long-term water content of subgrade soil would increases to Equilibrium Moisture Content. This result often causes the matric suction and parameter in soils to change. In order to understand this variational process, this research used wetting simulation test by the equipment and process developed by ourselves. It could discuss the relationship between the matric suction and parameter changed. The test result showed a big influence between matric suction and parameter in soil at the beginning of the wetting process. While the water content was very close to equilibrium moisture content, this influence tended to steady. In pavement engineering, the maximum shear modulus could assess the stiffness of pavement. Therefore, this research discussed the relation between the maximum shear modulus and the other parameters for understand their relationship. This research also developed a axis-translation technique of unsaturated soil triaxial apparatus which could control different matric suction. So we could understand the influence of matric suction changed for the soil parameters directly. The test results showed: the dry of optimum sample had the highest maximum shear modulus at beginning of wetting process, but the maximum shear modulus of it decreased quickly after wetting process .So the maximum shear modulus of optimum sample became the highest. And the matric suction had high relationship with the maximum shear modulus.
Hariharan, Narain. "Effect of Ionic Stabilization on Vertical Movement in Expansive Subgrade Soils in Texas." Thesis, 2013. http://hdl.handle.net/1969.1/151141.
Повний текст джерелаSoliman, Haithem. "Modelling of the resilient and permanent deformation behaviour of subgrade soils and unbound granular materials." 2015. http://hdl.handle.net/1993/30865.
Повний текст джерелаFebruary 2016