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Showing 1 to 13 of 13 for “"preconsolidation pressure"”.
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Evolution of Preconsolidation Pressure of Normally Consolidated Clays Over Full Temperature Range
… been established that temperature can change the preconsolidation pressure of clays, the current understanding is limited to specific ranges of temperatures, with temperatures above freezing being studied entirely independently of temperatures below freezing. However, as temperature is a …
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The effects of sample disturbance on preconsolidation pressure for normally consolidated and overconsolidated clays
… review of the methods available to estimate preconsolidation pressure and sample quality. It focuses on multiple disturbance-simulation triaxial tests on resedimented San Francisco Bay Mud (RSFBM) specimens. The effect of different ISA disturbance amplitudes (Baligh et al. 1987) on the …
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Determinação dos parâmetros de resistência, "Creep" e de Relaxação de Tensões de uma argila mole do Rio de Janeiro
… and these of "Santos" and the effect of the preconsolidation pressure is analysed. The stress-strain curves of the triaxial tests are represented by the hyperbolic formula. The strength and stress-strain parametersare determined and compared with those of other clays. The results of triaxial …
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The meaning and practical significance of the cohesion intercept in soil mechanics
… fraction of 2-93% and, activity of 0.1-9.6. The preconsolidation pressure ranges from a low of 44 kPa to a high of 14000 kPa. The values of c$\sp\prime$ have been correlated to both the stress history and plasticity index of the soil.
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A theory for the time dependent yielding and creep of clay
… and the "aging" effect, or increase in preconsolidation pressure with time under sustained load. The theory appears to be consistent with many aspects of the consolidation behavior of real clays, including: (1) secondary compression, (2) aging, (3) different values of Cv determined by …
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A comparison of the behavior of intact and Resedimented Boston Blue Clay (BBC)
… of consolidation, lateral stress ratio, preconsolidation pressure and peak friction angle of RBBC were within ranges for intact BBC. Ranges for secant friction angle, swell ratio and undrained strength for intact BBC overlapped and were lower than ranges reported for RBBC. Both intact and …
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Shear and consolidation behavior of slurry-deposited, desiccated tailings and compacted filtered tailings
… tests yielded a trend of increasing preconsolidation pressure with decreasing initial void ratio for both the desiccated and filtered tailings. There were slightly higher average compression and recompression indexes computed for the desiccated tailings relative to the filtered …
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Stiffness characterization of mechanically-compressed cohesive soils using wave propagation
… data based on the concept of apparent preconsolidation pressure. Finally, the dynamically-obtained stiffness parameters are compared to statically-obtained constrained modulus values from static compression. By using Gassmann's fluid substitution and a corrective X factor, a new …
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Geotechnical performance using alkaline activated fly ash for soil mixtures with and without polypropylene fibers
… Finally, the compression index and the preconsolidation pressure exhibited a substantial decrease and increase at 0.043, 0.076, 0.047, 0.104 and 900 kPa, 400 kPa, 500 kPa, 240 kPa for S1F40, S1FR0.75, S2F40 and S2FR0.75 respectively. It is to conclude, that the proposed new technique has …
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The application of critical state soil mechanics to predict ground deformations below an embankment constructed on soft alluvium
… of up to O.1Sm were measured. The excess pore pressures generated during construction were found to dissipate rapidly. Soil samples recovered from the site have been tested at city University. The alluvial clay is shown to have extremely variable compression characteristics and it is not …
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Engineering properties and behavior of silty soils
… developed modified energy method for determining preconsolidation pressure (sigma′p) with sigma′p/sigma′v0 in the range of 1 to 3, allowing consistent assessment of yield behavior from incremental loading tests even in the absence of a clear breakpoint between recompression and compression range. …
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A Regional Study on Champlain Sea Clay: Empirical Prediction of Consolidation Parameters and Statistical Characterization of Undrained Shear Strength Based on Historical Geotechnical Data
… Cone Penetration Testing (CPT) and CPT with pore pressure measurements (CPTu) for estimating and interpreting the behavior of CSCs. However, these methods are time-consuming and expensive for extending them in low budget geotechnical projects. During the last two decades there has been rapid urban …
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Ground improvement using vacuum preloading together with prefabricated vertical drains
… have been reported in the literature. The vacuum pressure, which is applied to the soft soil through the vertical drains, results in an isotropic increase in effective stress within the soil mass, and therefore, can be applied with full intensity in a single stage. On the other hand an equivalent …