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Showing 1 to 20 of 24 for “"soft clays"”.
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Bearing Capacity of Friction Piles in Deep Soft Clays
Made available in DSpace on 2014-12-05T17:36:47Z (GMT). No. of bitstreams: 1 0005966.pdf: 6943134 bytes, checksum: 2b7587cb3b93b8e5eda97d5c1ddc70dd (MD5) Previous issue date: 1953
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Seismic Response of Pile Foundations in Soft Clays and Layered Soils
… have concluded that pile foundations in soft clays and layered soils with significant stiffness contrast have also undergone severe damage during earthquakes. In this research, three different series of centrifuge experiments were performed to investigate the dynamic behaviour of soft …
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Simulation of sampling disturbance in soft clays using triaxial element tests
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1994.
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The mechanical behaviour of soft clays under vibration loading from vehicle traffic
… advanced studies on the mechanical behavior of soft clays. One of the most important aspects of soft clay behaviour is the time dependent deformation characteristics. The behavioral characteristics of soft clays suggest that an overstress type soil model is suitable for the analysis of such …
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Compressibility and permeability of natural soft clays and surcharging to reduce settlements
Soft clays, often with high compressibility and low permeability, are frequently encountered in important engineering projects. This investigation has been concerned with consolidation characteristics of natural soft clays.
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Full-Scale Lateral-Load Tests of a 3x5 Pile Group in Soft Clays and Silts
… profile consisted of cohesive layers of soft to medium consistency underlain by interbedded layers of sands and fine-grained soils. The piles were instrumented to measure pile-head deflection, rotation, and load, as well as strain versus pile depth.</p>
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Cyclic response of Gulf of Mexico clay from the Walker Ridge
… nearshore and onshore structures are founded on soft clays. Both the structure and the foundation soft clay generally must withstand a combination of non-standard cyclic environmental loads, gravity loads and seismic loads. The importance of these structures, be it from a safety, economic or …
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Soil improvement by vertical drains
Vertical drains are used in soft clays and silts to accelerate primary consolidation. In this study a practical method for predicting the magnitude and rate of settlement and pore water pressure dissipation of soft clays under embankment type of loading is described. A computer procedure, ILLICON, …
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Ground source heat storage and thermo-physical response of soft clay
… fluctuations and possibly deformation of soft clays. This thesis evaluates the thermo-mechanical response of soft clays to seasonal heat storage and associated temperature fluctuations. A literature review reveals that, in normally consolidated to lightly overconsolidated clays, increases …
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Reliability Analysis of Braced Excavations
… was applied to braced excavations in medium to soft clays (mainly in Japan), and a range of reliability in current practice was examined. The strut-buckling mode of current design appears to have reliability comparable to permanent structures, whereas two orders of magnitude lower reliability …
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The meaning and practical significance of the cohesion intercept in soil mechanics
… throughout the world. The soils which include soft clays to shales and residual soils, have a range of water content of 7-330%, liquid limit of 15-420%, plasticity index of 3-285%, liquidity index of $-$5.5 to 3.5, sensitivity up to 500, clay fraction of 2-93% and, activity of 0.1-9.6. The …
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Performance of Improved Ground and Reinforced Soil Structures during Earthquakes – Case Studies and Numerical Analyses
… of poorest soil conditions, typically containing soft clays and silts and/or loose, liquefiable sands. Because the affected region is heavily developed with infrastructure and there is a preponderance of poor soils, a wide range of soil improvement measures had been used to mitigate anticipated …
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Modelling effects of structure in soft natural clays
Geological processes give natural clays a different structure to that of clays that are reconstituted in the laboratory. In soft clays, this structure often breaks down under loading; this is called destructuration. This project aimed to develop a model to predict destructuration in soft natural …
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Characterization of Soft Clay and Clay-tire Interaction for the Prediction of Ground Mobility
Predicting tire performance on soft, fine-grained soils is required for many off-road explorations in the military, mining, agricultural, and earth-moving sectors. However, the mobility in deformable material is extremely challenging, especially in the presence of water. Although there is a …
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Basal Stability of Braced Circular Excavations in Isotropic and Anisotropic Clays
… in braced circular excavations in undrained soft clays. This analysis was conducted using the finite element method, focusing on both isotropic and anisotropic strength conditions. The initial study utilized the classic Mohr-Coulomb elastic-perfectly plastic constitutive model for isotropic, …
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Application of numerical limit analyses for undrained stability problems in clay
… substantial modifications of the pre-existing software: l) inclusion of structural beam and joint elements, that enable the program to model failure in combined bending, shear and axial loading; 2) implementation of functions to represent the undrained strength anisotropy of soft clays; and 3) …
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The effects of sample disturbance on preconsolidation pressure for normally consolidated and overconsolidated clays
… history and undrained shear strength of soft clays are well stated in the literature over the past decades. However, in practice, few qualitative methods are used even in the most complex engineering projects. Furthermore, there is not a widely accepted, quantitative method in order to …
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A new elasto-viscoplastic model for rate-dependent behavior of clays
… associated with constructed fills on marine clays, or rate-dependent cyclic response of offshore foundations under wave loading. Although there are many observations on rate-dependent characteristics of clays in laboratory tests, none of the existing soil models has attained consistent …
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Finite element study of geosynthetic encased stone columns in sensitive soft clay
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 …
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