The Membrane Effect in Triaxial Testing of Granular Soils

Etris, SF; Lieb, KC; Sisca, VK; Moore, IC; Batik, AL; Frydman, Sam; Zeitlen, JG; Alpan, I.

doi:10.1520/jte11599j

Cited by 79 publications

(2 citation statements)

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“…The copper rod method has been subsequently improved by many scholars [24][25][26]. Various empirical calculations for determining the embedded volume have also been proposed [27,28]; (iv) Analytical derivation method: Martin et al [29] proposed a theoretical and computational method based on the generation and development of pore pressure. The analytical expression of the embedded volume has been derived by the elasto-mechanical method used in calibration and applied to correct the measured data.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Shear Strength of Unsaturated Loess Samples from Conventional Triaxial Shear Tests Applying Rubber Membrane Correction

He,

Zhou,

Vanapalli

et al. 2024

Sustainability

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The shear strength parameters of loess samples are determined from conventional triaxial shear test results and used in the rational design of sustainable geotechnical infrastructures. However, the rubber membrane that is used in the triaxial shear apparatus for applying the all-around pressure to the test specimen has a significant influence on the measured shear strength parameters. In this paper, remolded and undisturbed unsaturated loess samples from northwest China are used in a comprehensive testing program to determine the shear strength from triaxial tests and understand the influence of a rubber membrane. The results show that the measured undrained cohesion from unconsolidated undrained triaxial tests on unsaturated soil specimens with and without a rubber membrane are significantly different. In this study, differences in the shear strength with and without a rubber membrane are assessed from shear strength index values that can be determined from undrained cohesion and the internal friction angle derived from conventional triaxial tests. Experimental results suggest that predominant changes arise mainly in the undrained cohesion values. The change rate of shear strength indices values of undisturbed loess shows a strong correlation with its water content; however, it is weak for remolded loess. The correlation coefficient between error and measured values of all shear strength indices is more than 0.8. Empirical correction relationships for triaxial shear tests with a rubber membrane for three different types of loess were established from the investigations. The simple approach used in this study can be used as a reference to apply corrections to the measured undrained cohesion values of unsaturated loess samples from northwest China.

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Section: Introductionmentioning

confidence: 99%

Determination of the Shear Strength of Unsaturated Loess Samples from Conventional Triaxial Shear Tests Applying Rubber Membrane Correction

He,

Zhou,

Vanapalli

et al. 2024

Sustainability

View full text Add to dashboard Cite

show abstract

“…Due to the influence of the MP, the experimental evaluation of the CRR needs to be critically revised. In this context, the MP has numerous literature Ansal and Erken [1996], Frydman et al [1973], Haeri and Shakeri [2010], Kiekbusch and Schuppener [1977], Newland and Alley [1957], Raju and Sadasivian [1974], Raju and Venkatramana [1980], Ramana and Raju [1982], Roscoe et al [1963], Seed et al [1989], Tokimatsu and Nakamura [1986], Vaid and Negussey [1984], Wichtmann [2005], Wichtmann et al [2019]. Unfortunately, most authors deal with empirical formulas for the MP.…”

Section: Introductionmentioning

confidence: 99%