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Showing 1 to 20 of 20 for “"marine clay"”.
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Constitutive behaviour of cement treated marine clay
… used to improve engineering performance of clayey soils in various applications. This thesis investigates the microstructure and macroscopic behaviour of laboratory prepared cement treated clay specimens that were cured under atmospheric, undrained and drained conditions. After a 7-day …
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Experimental investigation and constitutive modeling of marine clay
… developed based on experimental observations of marine clay from the Gulf of Mexico. Standard triaxial and torsional simple shear tests performed on the aforementioned clay demonstrate that the soil exhibits a cross-anisotropic behavior with lower compressibility in the direction of the …
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Three-Dimensional Reconstruction of Marine Clay Nano- and Microstructure By Transmission Electron Microscopy: Analysis of Fabric and Pore Network
<p>Three-dimensional reconstructions of marine fine-grained sediment open a new dimension for studying nano- and microscale organo-clay fabric important to improving and advancing organic matter (OM) sequestration and fluid flow dynamics modeling. I created 3-D reconstructions of clay fabric and …
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Interpretation of cone penetration test data for underconsolidated clay
… test data for a saturated and underconsolidated marine clay. It is shown that cone penetration test data not corrected for pore pressures underestimates undrained shear strength. Additionally, small increases in the degree of consolidation of the underconsolidated clay increases the undrained …
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Re-analysis of deep excavation collapse using a generalized effective stress soil model
… a 30m deep braced excavation underconsolidated marine clay. Prior analyses of the collapse of the Nicoll Highway have relied on simplified soil models with undrained strength parameters based on empirical correlations and piezocone penetration data. In contrast, the current research simulates …
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An evaluation of the utility of four in-situ test methods for transmission line foundation design
… tests were undertaken in residual, alluvial and marine clay soil conditions. The testing program was conducted with five areas of concern: (1) comparison of the penetration/ stiffness data from the four tests, (2) comparison of values of undrained shear strength and angle of internal friction …
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Effect of deep excavation on an adjacent pile foundation
… located close to a 30m deep braced excavation in Marine Clay corresponding to site conditions of the Kallang formation in Singapore. Parametric analyses were carried out, using non linear three-dimensional finite element methods (with Plaxis Foundation 3-D), comparing different pile lengths (17m, …
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A remedial approach to stabilize a deep excavation in Singapore
… soil profile in the site mainly consists of deep marine soft clay dated for the most part in the Holocene period, principally characterized by a normally to very low overconsolidation ratio, in some location even underconsolidated. The parametric analysis aims to evaluate short-term effects of the …
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A study of interaction effects due to bored tunnels in clay
… effects of tunneling twin tunnels in Singapore marine clay are outlined, analyzed and discussed. Three different configurations are taken into account, side-by-side tunnels, piggyback tunnels and angular-offset tunnels, located at a typical depth for Singapore. Empirical correlations, derived …
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Application of rate dependent soil model, MIT-SR, for evaluation of long-term ground movements due to consolidation and creep
Saturated clays exhibit rate-dependent behavior (i.e. their stress-strain-strength properties are significantly affected by the applied loading rate). This is of great significance for geotechnical projects, particularly when long-term predictions of settlements of compressible soil strata are …
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Cone Penetration Testing and Hydrogeological Monitoring of a Retrogressive Landslide in Champlain Sea Clay
Champlain Sea Clay (also known as Leda Clay) is a sensitive marine clay that was deposited within the limits of the Champlain Sea transgression during the final retreat of the Laurentide ice sheet. Upon isostatic rebound, the watersheds incised deep river valleys throughout the Ottawa region. These …
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Development of instrumented oedometer incorporated with bender element and electrical conductivity
… (EC) characteristics of solidified dredged marine clay and refined kaolin. Ordinary Portland cement was used at 5 %, 10 % and 15 % by dry weight of soil as a solidification agent. All specimens were mixed at twice the liquid limit. Prior to testing, all solidified specimens were cured for 7 …
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Pattern formation in geochemical systems.
… as well as in the colored rythmites found in the marine clay sediments of the Ottawa Valley. Several caveats in interpreting the results of such analyses are outlined.
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Geotechnical performance using alkaline activated fly ash for soil mixtures with and without polypropylene fibers
… fibers to stabilize and reinforce Kaolin clay (S1) and marine clay (S2) respectively. The fly ash solid ratio was considered to be 10%, 20%, 30%, 40%, while polypropylene fiber proportions adapted for the study were 0.5%, 0.75%, 1% 1.25%. Compressive-, flexural- and indirect tensile tests …
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ANALYSIS AND DESIGN OF EXCAVATION SUPPORT SYSTEM IN SOFT CLAY
… design procedures for deep excavations in soft clay in Singapore are not always adequate. Consequently, difficulties such as large strut loads and excessive ground movements are often encountered. Therefore, a method was proposed for the design of excavation support system in soft clay. The …
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Testing and constitutive modelling of saturated interfaces in dynamic soil-structure interaction.
… experiments are conducted on remolded clay-steel interfaces under undrained conditions and a constant normal stress. Also, a constitutive model for the stress-strain-pore-pressure behavior of cohesive soil interfaces under dynamic loading is developed using the new unified disturbed …
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Analysis of large deformation offshore geotechnical problems in soft clay
… two large deformation problems in soft clay and proposes a methodology for performing coupled flow and deformation analyses with advanced effective stress models. The first part of the research focuses on realistic 3-D finite element analyses (using AbaqusTM Standard) of a conductor …
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EFFECTIVE STRESS RANDOM FINITE ELEMENT ANALYSIS OF CEMENT-TREATED CLAY GROUND
This study dealt with the random behavior of cement-admixed soil. In this thesis, an advanced constitutive model for cement-admixed soil was firstly incorporated in finite element program. Then the numerical model was recalibrated and validated using cell test results. Parametric studies were …
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Settlement of the Kansai International Airport Islands
Restriction data tranferred 2014-07-01T11:35:23-05:00 Original Data Group with Access UIUC Users [automated] Release Date: 2015-08-22 11:49:27 UTC Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system