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Showing 1 to 19 of 19 for “"undrained strength"”.
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Undrained strength anisotropy of an overconsolidated thixotropic clay
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1987.
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Effective and total stress strength interpretation for silts
… to investigate the factors that control the strength parameters of silts. Effective and total stress strength interpretation were done on the test results. The effective stress friction angle were evaluated using the CU triaxial test results. Undrained strength parameters were determined from …
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Application of numerical limit analyses for undrained stability problems in clay
… of numerical limit analyses for planar, undrained stability problems in geotechnical engineering. The proposed analyses formulate upper and lower bound theorems for perfectly plastic, cohesivefrictional soils as linear programming problems, with spatial variations of the unknown …
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Rapid Drawdown Analysis using the Finite Element Method
… of practice for RDD analysis is a multi-stage undrained strength method based on limit equilibrium. The primary objective of this research was to develop a new method for rapid drawdown based on the finite element method. The new method estimates undrained strengths based on effective …
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Analysis of a Lateral Spreading Case History from the 2007 Pisco, Peru Earthquake
… an ideal case-study for the determination of the undrained strength of the liquefied soils; hence, the main objective of this research is to use the extensive data from the Canchamana Slide to estimate the shear strength of the liquefied soils. In engineering practice, the undrained strength of …
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The undrained behavior of saturated, dilatant silts
… soil pore water are the cause of the erratic undrained behavior often observed in triaxial tests on saturated, dilatant silts. The literature indicates that ground water contains various amounts of dissolved gases and that gases dissolved in soil pore water will have sufficient time to exit …
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The significance of specimen end restraint in high pressure triaxial testing of cohesive soil
… on the interpretation of triaxial test results. Undrained triaxial shear tests have been performed on specimens K0 consolidated to stresses ranging from 0.6 to 10 MPa. Behaviour is examined at three well-defined OCRs of 1, 2 and 4 in compression mode of shear. The tests were performed on …
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Ensaios de palheta de campo em argilas moles da Baixada Fluminense
… Test Apparatus", to determine the in situ shear strength of three deposits of a very soft plastic clay in Rio de Janeiro, Brazil. The author comments the performance of the equipment used and suggests some modifications. A bibliographic review on this subject is presented, and the variation with …
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A comparison of the behavior of intact and Resedimented Boston Blue Clay (BBC)
… for secant friction angle, swell ratio and undrained strength for intact BBC overlapped and were lower than ranges reported for RBBC. Both intact and RBBC CRS data plotted to the right of the sedimentation compression line (SCL) in the Burland (1990) framework, showing significant structure …
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Re-analysis of deep excavation collapse using a generalized effective stress soil model
… have relied on simplified soil models with undrained strength parameters based on empirical correlations and piezocone penetration data. In contrast, the current research simulates the engineering properties of the key Upper and Lower Marine Clay units using a generalized effective stress …
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An experimental investigation into the stress-dependent mechanical behavior of cohesive soil with application to wellbore instability
… Blue Clay (RBBC) as an analog test material. Undrained triaxial shear tests have been performed on specimens that were K0-consolidated to stress levels ranging from 0.15 to 10.0 MPa in both compression and extension shear modes. Compression tests were also performed on overconsolidated …
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The mechanical behavior of heavily overconsolidated resedimented Boston Blue Clay
… the effect of overconsolidation. A series of undrained triaxial compression shear tests have been performed on specimens that were Ko-consolidated and swelled to overconsolidation ratios (OCR) ranging from 5 to 62 on RBBC, as well as on Intact Presumpscot Maine Clay. Specimens were …
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Statnamic Lateral Load Testing and Analysis of a Drilled Shaft in Liquefied Sand
… increased pile diameter. P-y curves based on the undrained strength approach and the p-multiplier approach with values of 0.1 to 0.3 did not match the measured load-deflection curve over the full range of deflections. These approaches typically overestimated resistance at small deflections and …
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Engineering properties of Resedimented Ugnu Clay from the Alaskan North Slope
… tests were performed to ascertain the Ko and undrained shear properties as a function of consolidation stress. Consolidation stress for these specimens ranged from 190 kPa to 9,800 kPa. The range of Ko at maximum stress ranged from 0.47 to 0.65 where increasing consolidation stress resulted in …
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Liquefaction and ring shear device
… that needs more study is how the 'residual strength' remaining in the liquefied material evolves at the high strain levels imposed as the slide progresses. Strength of liquefied granular soils is usually studied in the lab by means of the triaxial test, since the strains required to trigger …
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The influence of salinity on the mechanical behavior of high plasticity soils
… Rate of Strain (CRS) and K₀ consolidated undrained shear in compression triaxial testing (CK₀UC) was undertaken. Specimens tested in the modified CRS device reached axial effective stresses between 30 and 40 MPa. Triaxial testing was performed over a very wide range of effective stresses …
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Characterization of a reconstituted low plasticity silt
… (CKoDSS), and Isotropic and Ko-consolidated undrained triaxial compression (CIUC and CKoUC) tests to define the engineering properties of the material. The experimental investigation finds that undercompaction is the best reconstitution technique for this material and it is almost impossible …
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The consolidation and strength behavior of mechanically compressed fine-grained sediments
… thesis investigates the consolidation and shear strength behavior of saturated fine-grained sediments over the effective stress range of 0.1 to 100 MPa. The research makes use of samples which are resedimented in the laboratory from natural soils. In addition to practical benefits, …
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The Residual Strength of Liquefied Soil
… To determine flow slide potential, the residual strength of liquefied soil is needed. However, this is an extremely difficult parameter to estimate for soil deposits due to spatial variability of soil properties, potential for the formation of water films, the intermixing of soils, and the …