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Showing 1 to 20 of 65 for “"Pore Water Pressure"”.
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Pore-water pressure accumulation under dynamic loadings
… analyses were conducted and the level of excess pore-water pressure accumulated during closely spaced earthquakes was investigated. Results of laboratory triaxial compression tests, drained, undrained, and cyclic direct simple shear tests on loose sandy tailings were used to calibrate the soil …
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The Behavior of Pore Water Pressure in Cohesive Subgrade Soils
This research focuses on the behavior of pore water pressure in subgrade cohesive soils under Falling Weight Deflectometer (FWD) tests. The deflection of a pavement structure largely depends on the deformation of subgrade soils, which is in turn dependent upon soil stiffness. Soil stiffness can be …
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Influence of Pore Water Pressure on the Engineering Properties of Intact Rock
Made available in DSpace on 2014-12-10T22:22:11Z (GMT). No. of bitstreams: 1 7500249.pdf: 8035732 bytes, checksum: 1bd7ff304a177792c508cd8d3bf25542 (MD5) Previous issue date: 1974
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The Effects of Vibration on the Penetration Resistance and Pore Water Pressure in Sands
… The tip resistance, sleeve friction and pore water pressure were also measured during the test by load cells and transducers in the cone itself. The vibration and cone data were compiled and compared to evaluate the effect of the vibration on the penetration resistance and pore water …
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Effect of Heating Rate on Thermally Induced Pore Water Pressure and Crack Evolution in Clay and Shales
… temperature distribution and the evolution of pore pressure under elevated temperatures. Clay shales, characterized by their extensive geological presence and low hydraulic conductivity, carry immense importance across a wide array of applications, including their pivotal role as caprock in oil …
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The relationship between slope stability and pore-water pressure in highly plastic clay in the Carrot River Basin
… tests showed Φᵣ' ranged from 6.0 to 9.1 °. Pore-water pressure distributions were characterized with models of steady state groundwater flow, drawdown following flooding, and of induced pore-water pressure caused by construction. The flood hydrograph was represented as a total head versus …
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Numerical modeling of constant rate of strain consolidation tests
… relationship of soil and includes the pore pressure compressibility of base measuring system. Parametric studies are preformed on Resedimented Boston Blue Clay normally consolidated behavior to investigate the effects of apparatus compressibility and strain rate. Finally, the predicted …
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Dynamic soil modeling in site response and soil-large pile interaction analysis
… using the displacement, acceleration, and pore water pressure time histories recorded in a free-field lateral spreading centrifuge test. The calibration process highlights the important role of small strain damping and the need for pressure-dependent dilation parameters to simultaneously …
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Response of Flooded Asphalt Pavement using PANDA
… damage caused by flooding. While the effects of pore water pressure in pavement have been studied using finite element modeling, few of the models consider a realistic moving tire and the viscoelastic behavior of the asphalt layer. Consequently, a three-dimensional finite element simulation based …
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Modeling of pore pressure propagation and dissipation in compressible porous media
… phenomena associated with the propagation of pore water pressure in high plasticity clays. Specifically, it addresses the pore pressure response in areas subjected to sudden increases in pore water pressure at their top boundary. The main applications of this research would be the study of …
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A Numerical Investigation of the Seismic Response of the Aggregate Pier Foundation System
… by soil stratification, soil properties, pore pressure dissipation, and earthquake time history. Comprehensive numerical modeling using FLAC were performed. The focus of the study in this research was divided into three parts: the studies of the ground acceleration, the excess pore water …
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Stability of tunnels in water saturated shale under cyclic stresses: investigation on the coupling between mechanical and seepage characteristics
Under the coupled effect of water and cyclic stress, the mechanical properties of mine surrounding rock deteriorate, and its permeability changes, posing challenges to tunnel excavation support and mine stability control. The interaction between water infiltration into the rock mass and externally …
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Modelling including associated testing of cohesive soil using disturbed state concept
… predicting the undrained stress-deformation and pore water pressure response of saturated cohesive soils subjected to cyclic loading is developed using the Disturbed State Concept (DSC) is presented in this dissertation. The model takes into account inelastic non-virgin behavior. Factors such as …
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Drumlins in North Dakota
… sand and gravel has been developed. Internal pore-water pressure, effective stress (intergranular stress on the sediment), load pressure of the overlying ice, and permeability of the sediment are taken into consideration. Shear strength of the sediment is a function of effective stress. High …
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Soil improvement by vertical drains
… 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, was developed within the framework of the traditional concepts of soil mechanics for consolidation analysis of soft clays …
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Landslide susceptibility mapping through enhanced dynamic slope stability analysis using earth observing satellite measurements
… moisture plays a critical role because increased pore water pressure reduces the soil strength and increases stress. The combined effect of soil moisture in unsaturated soil layers and pore water pressure in saturated soil layers is critical to accurately predict landslides. However, dynamic …
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Piles in Sand and in Sand Overlying Clay
… of axial load within the pile.<br/><br/>The pore water pressure was continuously monitored at selected points in the clay from the placement of the overburden to the final stages of the experiment. The density of the sand was carefully controlled during placement and was subsequently measured …
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Uma análise do comportamento das células de carga e dos piezômetros pneumáticos fabricados pela COPPE para utilização no metrô do Rio de Janeiro
… Piezometers were utilized measurement of the pore-water pressure behind the walls and at the bottom excavation. This work contains for each one of above instruments, a litterature review of similar equipments, and the description of the COPPE developed instruments, including considerations …
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Adensamento radial de argilas: programação automática e estudo experimental
… how to extend the program in order to determine pore-water pressure (and degree of consolidation) for any point and time. Describs the experimental study per-formed at the Soil Mechanics Laboratory of COPPE-UFRJ by the Author. It was intended only to illustrate the application of the computer …
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Settling and sedimentation behavior of fine-grained materials
… eight measuring points, which are connected to pressure transducers for measuring pore pressure changes during settling. Throughout the study, channel formation was observed and related to the experimental conditions affecting it. The excess pore pressure changes were measured during the large …
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