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Showing 1 to 20 of 21 for “"dense sand"”.
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The Effect of Container Boundaries on The Free-Field Behavior of Dense Sand When Subjected to Shock Loading
Made available in DSpace on 2014-12-08T23:56:49Z (GMT). No. of bitstreams: 1 6706762.pdf: 4276002 bytes, checksum: e2f7a9bf3ea198f336f9598924eac922 (MD5) Previous issue date: 1966
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Constitutive Modelling of Shear Localisation in Saturated Dilative Sand
Undrained deformation of dilative sand generates negative excess pore pressure. It enhances the strength which is called dilative hardening. This increased suction is not permanent. The heterogeneity at the grain scale triggers localisations causing local volume changes and associated drainage. The …
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Behaviour of locked sand during cavity expansion
The oil sand deposits in Alberta, western Canada, are a peculiar material in relation to the conventional understanding of the stress-dilatancy and drainage properties of sands. These deposits have a dense locked sand structure with high viscosity bitumen occupying a large portion of their void …
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Seismic Response of Structures on Shallow Foundations over Soft Clay Reinforced by Soil-Cement Grids
… 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 reinforcement, a zone with a "embedded" soil-cement grid which penetrated the lower dense sand layer and had a unit cell area …
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Modelling the impact of total stress changes on groundwater flow
… consisting of plastic clays, stiff till and dense sand layers commonly found in Saskatchewan potash mining regions. The model was run for two distinctive pile loading patterns. Model results indicated that the loading pattern has a significant influence on pore pressure generation beneath the …
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Bridge approach slab analysis and design incorporating elastic soil support
… of values of soil elastic modulus ranging from dense sand to very loose sand. Results from systematic studies assuming wash out of soil support are also presented using a customized uniaxial finite-difference model. The influences of wash-out length and location have been discussed. Moreover, …
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Experimental and numerical study of the rod shear test for determining steel-sand interface behavior
… axially loaded. In some cases rod shear tests in sands have produced anomalously high interface friction angles (δ) which may be, at least in part, due to differences in how the normal stress on the model pile has been interpreted. Therefore, the usefulness of the rod shear test as a means to …
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Numerical simulations of site response and seismic settlements at Kashiwazaki-Kariwa Nuclear Power Plant, Japan
… seismic settlements were observed in dry sand deposits at both the free-field site and around the power plant structure components. These total and differential settlements were reported to be the main reasons for water and oil leakage, which eventually led to flooding and fire. This study …
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Two-Dimensional Analysis of Water-Filled Geomembrane Tubes Used as Temporary Flood-Fighting Devices
… considers a single tube resting on clay and sand foundations. A finite difference program, FLAC, is used in the numerical analyses. The tube is assumed to be infinitely long, and it is modeled two-dimensionally. Beam elements are used to model the tube. The tube is inflated with water. The …
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Wave induced response of sea floor deposits : a simple model for sands and nonlinear analysis by FEM
… model is capable of simulating both loose and dense sand behavior under monotonic and cyclic loading, drained and undrained conditions. A nonlinear finite element analysis procedure is presented. A fictitious freedom technique is used to treat the different nodal degrees of freedom due to the …
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Long-term Cyclic Lateral Response and Optimisation of Shallow Foundations
… lateral response of shallow foundations in sand, and (iii) proposing alternative designs aimed at more efficient and cost-effective geometries. A comprehensive centrifuge modelling programme was conducted on a representative foundation for a 2 MW onshore wind turbine subjected to …
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Experiments in tunnel-soil-structure interaction
… the soil and building response to tunnelling in dense sand was investigated. Results illustrate that the presence of surface structures considerably altered the tunnelling-induced soil response. The building-to-tunnel position notably influences the magnitude of soil displacements and causes …
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The cyclic behaviour of sand, from the Prevost model to offshore geotechnics
… is the studying of the cyclic behaviour of dense sand. Its centre of gravity is the implementation of a convenient constitutive law in the finite element code LAGAMINE. The first step consists in summarising the salient features of the cyclic behaviour of sand observed in laboratory tests. …
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Investigation of Parameters Influencing Reverse Fault Rupture Propagation to the Ground Surface
… apparatus. Experiments were conducted on loose sand, dense sand, stiff clay, and soft clay. The same sand was used for both the dense and loose sand experiments and is identified as Monterey #2/16. The clay was a scale model mixture of San Francisco Bay Mud and consisted of kaolinite, bentonite, …
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Numerical modeling of a bridge system & its application for performance-based earthquake engineering
… foundations embedded in competent soil (dry dense sand) and subjected to shaking in the transverse direction. The other represented a typical five-span highway bridge system supported by pile group foundations embedded in liquefiable soils and subjected to shaking in the longitudinal …
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The axial behaviour of piled foundations in liquefiable soil
… installed such that its tips were embedded in a dense sand layer which was overlain by liquefiable soil. The tests examine the effects arising from the hydraulic conductivity in the bearing layer, the influence of axial pile cap support and finally whether there are any differences in the …
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Seismic Response of Pile Foundations in Soft Clays and Layered Soils
… induced effects on pile foundations embedded in sands. However, post-reconnaissance reports of several earthquakes 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 …
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Calculated versus measured static capacity for two pile types
… at Route WW consists of interbedded layers of sand, silt and clay with a thick layer of dense sand (SPN-values of 30 to 60) beginning at about a depth of 55 feet on the west end of the bridge and increases to over 70 feet on the east end below ground surface. The subsurface profile at Route U …
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Evaluation of cyclic behavior of dense sands under multidirectional loading using centrifuge tests
… response. NPPs founded on a thick deposit of dense coarse-grained soil may experience nontrivial settlements due to small, but accumulated volumetric strains during an earthquake. Studies that have investigated the seismic response of granular are primarily limited to unidirectional loading. …
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Element-level behavior of dense coarse grained soils under multidirectional dynamic loading
Made available in DSpace on 2019-02-08T18:39:52Z (GMT). No. of bitstreams: 3 BHAUMIK-DISSERTATION-2018.pdf: 437760645 bytes, checksum: 0176119bc23a25a034b1fa67ff5d4d16 (MD5) LICENSE.txt: 4214 bytes, checksum: 4cc9bbf36a898e87ebae93ef6275412a (MD5) PROQUEST_LICENSE.txt: 4560 bytes, checksum: …
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