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Showing 1 to 18 of 18 for “"Loose Sand"”.
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Numerical Analysis of FFP Impact on Saturated Loose Sand
… to numerically analyze FFP testing of saturated loose sands using the particle-based Material Point Method (MPM). The numerical analysis was conducted by simulating calibration chamber FFP tests on saturated loose quartz sand. The numerical results using quasi-static properties resulted in a …
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Contributions to the analysis and mitigation of liquefaction in loose sand slopes
This research analyzes the vulnerability of loose granular waterfront fills to liquefaction in seismic events and considers the effectiveness of Pre-fabricated Vertical (PV) drain systems in mitigating potential damage. The analyses are based on non-linear finite element simulations of coupled flow …
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The Development of Shaft Friction and End Bearing for Piles in Homogeneous and Layered Soils
… segmental tubular steel pile jacked into loose sand, and loose sand overlying clay. The soil was placed under controlled conditions in a 3.0 m diameter by 3.0 m deep concrete tank.<br/><br/>The variation in local unit shaft friction and radial effective stress was monitored along the pile …
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Soil-Structure Interaction for low damage Seismic Rocking Systems
… in a centrifuge. The models were placed on a dry sand bed and subjected to a sequence of earthquake motions. Dense and then medium dense (loose) sand were used. The range of rocking amplitude that is required for base isolation was quantified. Overall, it is shown that the relative density of sand …
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Investigation of Parameters Influencing Reverse Fault Rupture Propagation to the Ground Surface
… of the 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, …
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Bridge approach slab analysis and design incorporating elastic soil support
… 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, the …
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Piles in Sand and in Sand Overlying Clay
… tubular steel piles driven and placed into loose sand and loose sand overlying clay. The soil was placed and instrumented under controlled conditions in a 3.0m diameter by 3.0m deep concrete tank. The 60mm pile was dynamically driven using a pneumatically controlled driving rig, whilst the …
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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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Investigating the performance of continuous helical displacement piles
… predictions, particularly when installed in sand. Model CHD piles were created in pluviated test beds at a range of different densities and compared to model displacement and non-displacement piles. The load tests show that the CHD piles have a similar ultimate capacity to displacement piles. …
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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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Estimating the effectiveness of stone columns in mitigating post-liquefaction settlement using Plaxis 2D
… during an earthquake dissipates in saturated loose sand, it causes post-liquefaction reconsolidation that can potentially yield substantial damage to the structure. To build resilient infrastructure, it is paramount to estimate these settlements as well as introduce soil reinforcement …
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Wave induced response of sea floor deposits : a simple model for sands and nonlinear analysis by FEM
… The simple 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 …
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Dynamic Soil-Structure Interaction In Buildings With Oil Dampers
… embedment of raft foundations into dry dense and loose sand beds. Aspect ratios and foundation bearing pressures of the model structures were also varied to trigger different levels of SSI. Miniature accelerometers were used during the centrifuge tests to measure soil and structural accelerations, …
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Use of the mini-cone penetrometer for evaluating the liquefaction potential of sands associated with Charleston, S.C. seismic events
… found evidence for the repeated liquefaction of sandy soils in the Charleston area due to recurring large seismic events. In the course of this investigation 24 mini-cone penetration tests were performed at seven sites in or near the meizoseismal zone of the 1886 earthquake to determine the …
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Passive Site Remediation for Mitigation of Liquefaction Risk
… controllable gel times of up to about 100 days. Loose Monterey No. 0/30 sand samples (Dr = 22%) treated with colloidal silica grout were tested under cyclic triaxial loading to investigate the influence of colloidal silica grout on the deformation properties. Distinctly different deformation …
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Pore-water pressure accumulation under dynamic loadings
… and cyclic direct simple shear tests on loose sandy tailings were used to calibrate the soil constitutive model under low applied vertical stress conditions. The seismically induced pore-water pressures calculated from the numerical analysis are compared with previous analytical methods …
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Physical modeling of pile load tests in sand using the similitude and compressibility concepts
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Manufacturing bio-bricks using microbial induced calcium carbonate precipitation and human urine
… carbonate was then used as a bio-cement to glue loose sand particles together in the shape of a brick. The cementation media was made by adding calcium chloride and nutrient broth to the stabilised urine, and lowering its pH to 11.2. The purpose of adding calcium chloride was to improve the …