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Dissertations / Theses on the topic 'Soft Soil'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Rafalko, Susan Dennise. "Rapid Soil Stabilization of Soft Clay Soils for Contingency Airfields." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/35985.

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Since World War II, the military has sought methods for rapid stabilization of weak soils for support of its missions worldwide. Over the past 60 years, cement and lime have consistently been found to be among the most effective stabilizers for road and airfield applications, although recent developments show promise using nontraditional stabilizers. The purpose of this research is to determine the most effective stabilizers and dosage rates of stabilizers to increase the strength of soft clay soils (initial CBR = 2) within 72 hours for contingency airfields to support C-17 and C-130 aircraf

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2

Rouhanifar, Salman. "Mechanics of soft-rgid soil mixtures." Thesis, University of Bristol, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.730886.

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3

Nuno, Cristelo. "Deep soft soil improvement by alkaline activation." Thesis, University of Newcastle Upon Tyne, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506707.

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4

Rothhämel, Mirja. "Near-surface soil stabilisation to reduce the frost susceptibility of soft soils." Licentiate thesis, Luleå tekniska universitet, Geoteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-71219.

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5

Low, Han Eng. "Performance of penetrometers in deepwater soft soil characterisation." University of Western Australia. School of Civil and Resource Engineering, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0008.

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Offshore developments for hydrocarbon resources have now progressed to water depths approaching 2500 m. Due to the difficulties and high cost in recovering high quality samples from deepwater site, there is increasing reliance on in situ tests such as piezocone and full-flow (i.e. T-bar and ball) penetration tests for determining the geotechnical design parameters. This research was undertaken in collaboration with the Norwegian Geotechnical Institute (NGI), as part of a joint industry project, to improve the reliability of in situ tests in determining design parameters and to improve offshore

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6

Wilson, Daniel W. "Soil-pile-superstructure interaction in liquefying sand and soft clay /." Davis, Calif. : Center for Geotechnical Modeling, Dept. of Civil and Environmental Engineering, University of California, Davis, 1998. http://cgm.engr.ucdavis.edu/download/html.

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7

Schaefer, Vernon Ray. "Analysis of reinforced embankments and foundations overlying soft soils." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/49886.

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The use of tensile reinforcement to increase the tensile strength and shear strength of soils has lead to many new applications of reinforced soil. The use of such reinforcing in embankments and foundations over weak soils is one of the most recent applications of this technology. The studies conducted were concerned with the development of and application of analytical techniques to reinforced soil foundations and embankments over weak soils. A finite element computer program was modified for application to reinforced soil structures, including consolidation behavior of the foundation soil.

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8

Zhang, Rongan Engineering &amp Information Technology Australian Defence Force Academy UNSW. "Finite element study of geosynthetic encased stone columns in sensitive soft clay." Awarded by:University of New South Wales - Australian Defence Force Academy. Engineering & Information Technology, 2009. http://handle.unsw.edu.au/1959.4/44263.

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Some normally consolidated soft soils manifest strength sensitivity, ie these soil manifest strain softening when shear in an undrained mode. These soils, referred to as sensitive soft soils, have the typical features of strain hardening in drained shearing and strain softening in undrained shearing. The consolidation lines of these soils are also curved (concave upwards) in the semi-log space. However, under high consolidation stress or upon large shearing, these soils re-gain the features of re-constituted soil. Ground improvement methods like stone columns were reported as not effective whe

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9

Bame, Abda Berisso. "New Method of Sinking Caisson Tunnel in Soft Soil." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23298.

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Sinking a caisson tunnel in soft soil is new idea and this new concept could be an alternative method of tunneling in soft soil. The aim of this study is to evaluate geotechnical feasibility of sinking the caisson tunnel to the desired depth at the selected soil profile along tunnel alignment. This caisson tunneling method is proposed to reduce the use of temporary works such as propping of sheet pile walls and increase the ease and speed of construction. Besides, it reduces the disturbance on the nearby structures due to vibration.

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10

Alkhorshid, Nima Rostami. "Analysis of geosynthetic encased columns in very soft soil." reponame:Repositório Institucional da UnB, 2017. http://repositorio.unb.br/handle/10482/32033.

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Tese (doutorado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Civil e Ambiental, 2017.<br>Submitted by Raquel Almeida (raquel.df13@gmail.com) on 2017-10-25T15:24:11Z No. of bitstreams: 1 2017_NimaRostamiAlkhorshid.pdf: 7386972 bytes, checksum: 238f441115959a3c09f983f6db0ef8d7 (MD5)<br>Approved for entry into archive by Patrícia Nunes da Silva (patricia@bce.unb.br) on 2018-06-04T14:03:43Z (GMT) No. of bitstreams: 1 2017_NimaRostamiAlkhorshid.pdf: 7386972 bytes, checksum: 238f441115959a3c09f983f6db0ef8d7 (MD5)<br>Made available in DSpace on 2018-06-04T14:03:43Z (

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11

Bamunawita, Chamari. "Soft clay foundation improvement via prefabricated vertical drains and vacuum preloading." Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20041013.160202/index.html.

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12

Walker, Rohan. "Analytical solutions for modeling soft soil consolidation by vertical drains." Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20060725.102120/index.html.

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13

Zou, Yong, University of Western Sydney, of Science Technology and Environment College, and School of Engineering and Industrial Design. "Behavior of the expanded polystyrene(EPS)geofoam on soft soil." THESIS_CSTE_EID_Zou_Y.xml, 2001. http://handle.uws.edu.au:8081/1959.7/792.

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Excessive settlement and foundation instability are some of the main problems commonly encountered in fills and embankment structures built on a soft soil of low bearing capacity.The Expanded Polystyrene(EPS)replacement method, by partially or fully replacing the conventional fill material with extremely lightweight EPS geofoam, may solve these problems. In this thesis, experimental and theoretical work have been carried out to investigate the behaviour of EPS under various loading conditions in geotechnical applications and the effectiveness of EPS replacement technique has been studied using

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14

Widodo, Slamet. "Analysis of dynamic loading behaviour for pavement on soft soil." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2014. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-129531.

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The increasing need for regional development has led engineers to find safe ways to construct the infrastructure of transportation on soft soils. Soft soil is not able to sustain external loads without having large deformations. The geotechnical properties of soft soil which is known for its low bearing capacity, high water content, high compressibility and long term settlement as well. In pavement engineering, either highway or runway as an infrastructure, a pavement encompasses three important parts namely traffic load, pavement and subgrade. Traffic load generated from tire pressure of vehi

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15

Elder, Donald McGillivray. "Stress strain and strength behaviour of very soft soil sediment." Thesis, University of Oxford, 1985. http://ora.ox.ac.uk/objects/uuid:48050e2f-832d-47f4-9e3b-b922176f451b.

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Introduction: When fine grained natural sediments or artificially produced waste materials are transported and deposited through water, several different phases of behaviour are observed. These have been described variously as suspension, free settling, compression settling, intermediate and consolidating soil phases. Transitions between each are not always distinct in terms of material properties or behaviour and time spent in the early phases before a conventional soil state is attained can be a significant proportion of the total period of engineering interest. The eventual state attained f

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16

Pinto, Eduardo Jose. "A Three Dimensional Discretized Tire Model For Soft Soil Applications." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/41335.

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A significant number of studies address various aspects related to tire modeling; most are dedicated to the development of tire models for on-road conditions. Such models cover a wide range of resolutions and approaches, as required for specific applications. At one end of the spectrum are the very simple tire models, such as those employed in real-time vehicle dynamic simulations. At the other end of the spectrum are the very complex finite element models, such as those used in tire design. In between these extremes, various other models have been developed, at different levels of compromise

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17

Zou, Yong. "Behavior of the expanded polystyrene(EPS)geofoam on soft soil." Thesis, View thesis View thesis View thesis, 2001. http://handle.uws.edu.au:8081/1959.7/792.

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Excessive settlement and foundation instability are some of the main problems commonly encountered in fills and embankment structures built on a soft soil of low bearing capacity.The Expanded Polystyrene(EPS)replacement method, by partially or fully replacing the conventional fill material with extremely lightweight EPS geofoam, may solve these problems. In this thesis, experimental and theoretical work have been carried out to investigate the behaviour of EPS under various loading conditions in geotechnical applications and the effectiveness of EPS replacement technique has been studied using

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18

Zou, Yong. "Behavior of the expanded polystyrene (EPS) geofoam on soft soil /." View thesis View thesis View thesis, 2001. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030428.112945/index.html.

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Thesis (Ph.D.) -- University of Western Sydney, Nepean, 2001.<br>A thesis submitted for the degree of Doctor of Philosophy, School of Civic Engineering and Environment, University of Western Sydney, Nepean, January, 2001. Bibliography : p. 215-225.

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19

Lee, Nang Lap. "Analytical, centrifuge and numerical modelling of underwater vacuum consolidation of soft clay /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202007%20LEEN.

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20

Zhao, Lin Shuang. "Modelling column-supported and geosynthetic-reinforced embankment on soft soil foundation." Thesis, University of Macau, 2018. http://umaclib3.umac.mo/record=b3951591.

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21

Sivasithamparam, Nallathamby. "Development and implementation of advanced soft soil models in finite elements." Thesis, University of Strathclyde, 2012. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25980.

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22

Söderlund, Olov. "Stabilization of Soft Soil with Lime and PetritT-An Experimental Study." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70912.

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23

Mohd, Yusof Khairul Nizar B. "Composite foundations on Malaysian soft clay soil : applications of innovative techniques." Thesis, University of Leeds, 2012. http://etheses.whiterose.ac.uk/11310/.

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An innovative technique of electro osmosis coupled with vertical surcharge loading to accelerate the consolidation and stiffen Kaolin (China Clay Grade E) was investigated in this study. The geotechnical properties of this China Clay Kaolin Grade E and the design of electro osmotic consolidation chamber are discussed together with an explanation of the procedural concept of the electro osmotic consolidation chamber (i.e., the preparation of the apparatus and the clay sample, assembling of the electro osmotic consolidation chamber; and the experimental work). The plastic limit, liquid limit and

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24

Khansari, Hossein. "An investigation of one-dimensional compression and consolidation of intact and reconstituted Bothkennar soft soil." Thesis, University of the West of England, Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337381.

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25

Revathi, Palaniappan Natchammai. "Forest Machine Track-Soil Interaction." Thesis, KTH, Maskinkonstruktion (Inst.), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-142428.

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I många västeuropeiska länder har metoden för skogsavverkning ändrats från användning av motorsåg till ett mekaniserat skogsavverkningssystem känt som kortvirkesmetoden. Denna metod är baserad på en tvåmaskinslösning – en skördare som fäller, grenar och sågar träden enlig fördefinierade längder, och en skotare som transporterar stockarna till en lastplats för vidare transport till en bearbetningsanläggning. För att utveckla skogsmaskiner som är skonsammare för marken behövs en djupare förståelse av interaktionen mellan terrängen och dragfordonet. Huvudfokus i detta projekt ligger på bandgående

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26

Pham, Van Hung. "3D modelling of Soft soil Improvement by Rigid Inclusions - Complex and Cyclic loading." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAI057/document.

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Le but de cette étude est d'étudier le renforcement des sols par inclusions rigides sous chargement complexe et cyclique. L'effet de certains paramètres liés à la définition d’un chargement complexe et cyclique sur le comportement du système est mis en évidence.Du point de vue des chargements statiques complexes, des semelles de fondation posées sur un sol compressible renforcé par inclusions rigides sans matelas soumis à des charges centrées, excentrées verticales et horizontales et à quelques cycles de charge ont été étudiées. Des approches numériques et expérimentales sont présentées. Les r

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27

Crosariol, Victor A. "Scale Model Shake Table Testing of Underground Structures in Soft Clay." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/322.

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Underground structures perform an important role in transportation systems in many seismically active regions around the world, but empirical data regarding the seismic behavior of these structures is limited. This research works towards filling that empirical gap through the use of scale model shake table testing. Underground seismic soil-structure interaction (USSSI) effects were investigated for a stiff rectangular tunnel cross-section embedded within soft clay. San Francisco Young Bay Mud was used as a prototype soil for developing a scale model soil mixture consisting of kaolinite, be

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28

Bolton, Mark William. "Soil Improvement Using Optimised Cementitous Materilas Design." Thesis, Griffith University, 2014. http://hdl.handle.net/10072/365243.

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This thesis provides a detailed study on optimisation of cementitous treated soft clay soils in the South East Queensland region. A comparative study has been performed comparing the behaviour of cement and lime treated compressible clays from both Bangkok and South East Queensland. The purpose of the comparative study was to evaluate change in strength properties of treated soft clay soil as well as providing parameters for case studies using different analysis methods. This thesis compares the behaviour of soft clay treated with cementitous materials in South East Queensland and Bangkok. Ove

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29

Khosravi, Mohammad. "Seismic Response of Structures on Shallow Foundations over Soft Clay Reinforced by Soil-Cement Grids." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/72978.

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This study uses dynamic centrifuge tests and three-dimensional (3D), nonlinear finite-difference analyses to: (1) evaluate the effect of soil-cement grid reinforcement on the seismic response of a deep soft soil profile, and (2) to examine the dynamic response of structures supported by shallow foundations on soft clay reinforced by soil-cement grids. The soil profile consisted of a 23-m-thick layer of lightly over-consolidated clay, underlain and overlain by thin layers of dense sand. Centrifuge models had two separate zones for a total of four different configurations: a zone without reinfor

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30

Al, Quraishi Murtdha Hashim Hassoon. "Reduction in psuedospectral acceleration at soft clay sites with the installation of deep soil mixed soil-cement panels." Thesis, California State University, Fullerton, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10244537.

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<p> Improving the engineering properties of soil through soil modification has been implemented in practice for a number of years. However, construction over soft soil sites has remained a major challenge for projects all over the world because the ground shaking amplifies as it travels through soft soils and will result in an increase in the pseudospectral acceleration. Design of infrastructure depends on the seismic shaking levels from an earthquake. If the amplification of the ground motions can be reduced, the design of the infrastructure can be more economical. For this research, a lamina

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31

Jeyakanthan, Velautham Engineering &amp Information Technology Australian Defence Force Academy UNSW. "Electro-osmotic stabilisation of soft soils : a numerical approach." Awarded by:University of New South Wales - Australian Defence Force Academy. Engineering & Information Technology, 2009. http://handle.unsw.edu.au/1959.4/44101.

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A numerical formulation for two-dimensional electro-osmotic consolidation in soft clays was derived from the basic equations of fluid flow, current flow and virtual work law. And, a well known elasto-plastic soil model, Modified Cam Clay was embedded into the formulation and implemented into the finite element program AFENA. The formulation was evaluated by comparing the predicted settlement and pore water pressure response with the values obtained from laboratory tests. The tests were conducted in an electro-osmotic triaxial apparatus, which was modified from a standard triaxial apparatus to

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32

Geiman, Christopher Matthew. "Stabilization of Soft Clay Subgrades in Virginia Phase I Laboratory Study." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/32499.

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Many pavement subgrades in Virginia consist of wet, highly plastic clay or other troublesome soils. Such soils can be treated with traditional lime and cement stabilization methods. Alternatives, including lignosulfonates and polymers, are available, but their performance record is mixed and solid engineering data is lacking, which prevents reliable design. The goal of this research was to screen a suite of traditional and non-traditional stabilizers against three Virginia soils that have caused problems during construction or resulted in poor performance in service. The selected stabilize

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33

Haji, Ashrafi Mohammad Ali. "Implementation of a Critical State Soft Soil Creep Model with Shear Stiffness." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25667.

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The existing creep constitutive models do not include directly shear stiffness of the soil that can be easily obtained by standard geotechnical tests. These models do not account for high shear stiffness of the soil at small mobilisation degree. In this respect, they do not distinguish between soil elements that undergo lower mobilisation in the far field and the ones that undergo higher mobilisation close to the embankment. This may result in overprediction of horizontal displacements under the field and the result of the finite element analysis is sensitive to the extension of the model boun

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34

He, Rui. "Systematic Tire Testing and Model Parameterization for Tire Traction on Soft Soil." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/104386.

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Tire performance over soft soil influences the performance of off-road vehicles on soft soil, as the tire is the only force transmitting element between the off-road vehicles and soil during the vehicle operation. One aspect of the tire performance over soft soil is the tire tractive performance on soft soil, and it attracts the attention of vehicle and geotechnical engineers. The vehicle engineer is interested in the tire tractive performance on soft soil because it is related to vehicle mobility and energy efficiency; the geotechnical engineer is concerned about the soil compaction, brought

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35

Siribumrungwong, Boonlert. "Elasto-viscoplastic numerical analysis of soil-foundation interaction in soft clay ground." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/138510.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第12297号<br>工博第2626号<br>新制||工||1370(附属図書館)<br>24133<br>UT51-2006-J289<br>京都大学大学院工学研究科社会基盤工学専攻<br>(主査)教授岡二三生, 教授田村武, 教授大津宏康<br>学位規則第4条第1項該当

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36

Dong, 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.

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Railway tracks experience elevated rail deflections when the supporting soil is soft and/or the train speed is greater than approximately 50% of the wave propagation velocity in the track-soil system (i.e. the critical velocity). Such vibrations are undesirable, so soil replacement or soil improvement of the natural soil (or alternatively mini-piles or lime-cement treatment) is often used to increase track-ground stiffness prior to line construction. Although areas of existing soft subgrade might be easily identified on a potential new rail route, it is challenging to determine the type and de

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37

Al-Zubaidi, Ibrahim. "Numerisk simulering av sättningar och portryck för en provbank på sulfidjord." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-61966.

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Den finkorniga sulfidjorden som finns längs Norrlandskusten är känd för sin stora sättningsbenägenhet och utgör en potentiell miljörisk genom försurning och urlakning av metaller om den inte hanteras rätt. För att förebygga miljörisker och utveckla jordförstärknings- och grundläggningsmetoder måste en ökad kunskap om sulfidjordar tas fram. I ett pågående forskningsprojekt vid Statens Geotekniska Institut studeras sulfidjords kompressionsegenskaper och rekommendationer ska tas fram avseende underlag för sättningsberäkningar. I projektet omfattas ett antal provbankar där ett av dessa områden, La

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38

Alves, Ricardo Manuel Monteiro. "Estudo de modelação da consolidação acelerada por drenos verticais tomando em consideração a fluência do terreno." Master's thesis, Faculdade de Ciências e Tecnologia, 2011. http://hdl.handle.net/10362/5890.

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Dissertação elaborada no Laboratório Nacional de Engenharia Civil para obtenção do grau de mestre em Engenharia Civil no Perfil de Geotecnia pela Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa no âmbito do convénio de cooperação entre a UNL e o LNEC<br>O assentamento de aterros em solos moles é frequentemente acelerado pelo uso de um sistema de drenos verticais. A utilização de sobrecargas associadas a este sistema reduz as deformações a longo prazo. Existem, porém, dúvidas no que se refere ao tempo que estas cargas devem ser mantidas para reduzir as deformações por fluênc

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39

TEIXEIRA, CHRISTIANO FARIA. "SETTLEMENT ANALYSIS OF AN EMBANKMENT ON VERY SOFT SOIL IN BARRA DA TIJUCA." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2012. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=21333@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>um depósito de solos muito moles da Barra da Tijuca (Baixada de Jacarepaguá), que pertence a uma planície costeira do Rio de Janeiro (RJ). O perfil de solos muito moles de fundação possuía até 17 m de espessura, caracterizados pelo Nspt igual a 0. O aterro foi construído em etapas e os recalques foram acelerados com a instalação de drenos verticais pré-fabricados na fundação. A

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40

Yfantis, Georgios. "Kinematics of soft soil landslides based on the analysis of microseismic monitoring data." Thesis, University of Strathclyde, 2015. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25953.

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Landslide failures are a worldwide problem claiming human lives and causing catastrophic damages to infrastructure, with their impact able to reach that of war conflicts. For these reasons this thesis is going to investigate on the use of microseismic monitoring to study the kinematic behaviour of landslides and help towards the design of an optimised early or real time warning system. All findings are based in field experiments, using 1D and 3D short period seismometers, designed to understand the capabilities and limitations of microseismic monitoring in order to enhance the first and minimi

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41

Ellis, Edward Alan. "Soil-structure interaction for full-height piled bridge abutments constructed on soft clay." Thesis, University of Cambridge, 1998. https://www.repository.cam.ac.uk/handle/1810/283725.

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42

Navin, Michael Patrick. "Stability of Embankments Founded on Soft Soil Improved with Deep-Mixing-Method Columns." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/28654.

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Foundations constructed by the deep mixing method have been used to successfully support embankments, structures, and excavations in Japan, Scandinavia, the U.S., and other countries. The current state of practice is that design is based on deterministic analyses of settlement and stability, even though deep mixed materials are highly variable. Conservative deterministic design procedures have evolved to limit failures. Disadvantages of this approach include (1) designs with an unknown degree of conservatism and (2) contract administration problems resulting from unrealistic specifications

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43

Baethgen, Walter E. "Optimizing soil and fertilizer nitrogen use by intensively managed soft red winter wheat." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/74745.

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Field experiments were conducted in the Coastal Plain and Ridge and Valley regions of Virginia during the 1981-82 through 1985-86 winter wheat growing seasons. The treatments in all experiments consisted of varying amounts of N fertilizer rates applied at Zadoks' growth stages 25 (GS 25) and 30 (GS 30). The research was divided into three studies. The first study was conducted to assess the effect of N fertilizer rates and climatic conditions on the amounts and patterns of the crop N uptake. Dry matter production and total N concentration were measured in total above ground plant material at d

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Manivannan, Ganeshalingam Aerospace Civil &amp Mechanical Engineering Australian Defence Force Academy UNSW. "Viscoplastic modelling of embankments on soft soils." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Aerospace, Civil and Mechanical Engineering, 2005. http://handle.unsw.edu.au/1959.4/38743.

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A major instrumented geosynthetic reinforced approach embankment was constructed to 5.5 m elevation above ground, with prefabricated vertical drains, over a soft compressible clay deposit at Leneghan, Newcastle, Australia in May 1995. The field monitoring of settlements for over six years shows that the embankment manifests significant creep. The instrumentation, field performance and the finite element analyses for predicting the long-term performance of this embankment are described in this thesis. The maximum settlement of 1.1 m was observed one year after the completion of construction. H

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Toma, Tahsin Munir. "A model study of negative skin friction on a fixed base pile in soft clay." Thesis, Heriot-Watt University, 1989. http://hdl.handle.net/10399/919.

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In this research programme, a small-scale laboratory test was carried out to investigate the phenomenon of negative skin friction through studying the interaction between a pile and the surrounding soil and to obtain, by means of an instrumented 50mm diameter model pile, an expression for the magnitude and distribution of negative skin friction for an end-bearing pile in soft clay. The programme included measurements of pore water pressures using miniature piezometers, both vertically along the pile shaft and laterally from it, as the pattern of dissipation of this pressure controls the distri

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Ozdemir, Murat Aziz. "Improvement Of Bearing Capacity Of A Soft Soil By The Addition Of Fly Ash." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613254/index.pdf.

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ABSTRACT IMPROVEMENT OF BEARING CAPACITY OF A SOFT SOIL BY THE ADDITION OF FLY ASH &Ouml<br>ZDEMIR, Murat Aziz M.Sc., Department of Civil Engineering Supervisor : Prof. Dr. Erdal &Ccedil<br>OK&Ccedil<br>A Co-Supervisor : Assoc. Prof. Dr. Murat G&Uuml<br>LER May 2011, 119 pages Soft soils are not suitable for use in runway and highway construction due to their undesirable characteristics such as poor grading, low strength, excessive plasticity, tendency to shrink or swell. By stabilizing such soils with appropriate agents, their engineering properties can be improved. One of the stabilizing age

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Jafer, H. M. "Soft soil stabilisation using a novel blended cementitious binder produced from waste fly ashes." Thesis, Liverpool John Moores University, 2017. http://researchonline.ljmu.ac.uk/7541/.

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Soil stabilisation is one of the most common techniques used to mitigate the undesirable properties of soft soils such as low compressive strength and high compressibility. Cement is the most commonly used binder for soil improvement applications in the UK and worldwide due to its high strength performance. However, its manufacture is energy intensive and expensive, contributing approximately 7% of global carbon dioxide (CO2) emissions. Therefore, the search for alternative raw materials, such as waste and by-products, is becoming critical in order to develop cost effective and more environmen

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Ferreira, José Nuno Varandas da Silva. "Long-term behaviour of railway transitions under dynamic loading application to soft soil sites." Doctoral thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/10145.

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Dissertação para obtenção do Grau de Doutor em Engenharia Civil<br>Transition zones in railway tracks are built to mitigate damage and wear to tracks and trains, and discomfort to passengers, caused by structural and foundation discontinuities, such as those introduced by bridge approaches or culverts. However, additional strains are still generated that cause changes of track geometry, that lead to more frequent maintenance operations and sometimes speed restrictions, that raise costs, and need to be minimized. This thesis addresses those questions and describes research undertaken to mod

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Mori, Yasushi. "SOFT X-RAY VISUALIZATION AND ANALYSIS ON HYDRAULIC AND GEOMETRICAL PROPERTIES OF SOIL MACROPORE." Kyoto University, 1999. http://hdl.handle.net/2433/182434.

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Carlton, Brian. "An Improved Description of the Seismic Response of Sites with High Plasticity Soils, Organic Clays, and Deep Soft Soil Deposits." Thesis, University of California, Berkeley, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3640374.

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<p> Near surface soils can greatly influence the amplitude, duration, and frequency content of ground motions. The amount of their influence depends on many factors, such as the geometry and engineering properties of the soils and underlying bedrock, as well as the earthquake source mechanism and travel path. Building codes such as the 2012 International Building Code (IBC) define six site categories for seismic design of structures, which are based on the sites defined by the National Earthquake Hazards Reduction Program (NEHRP). Site categories A, B, C, D, and E are defined by the time avera

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