Disturbed State Concept Model for Studying on Mechanical Characteristics of Saturated Cohesive Soils

doi:10.16183/j.cnki.jsjtu.2004.06.023

Abstract

Abstract:

Based on the disturbed state concept (DSC) theory, a new constitutive model of saturated soft cohesive soil was presented through defining relative intact state, fully adjusted state and disturbed function for the saturated cohesive soil. Analyzing the mechanical characteristics of the typical saturated cohesive soil of Shanghai by consolidated-undrained triaxial shear tests, the relationship among axial stress, axial train and pore water pressure of the soil was obtained under different confining pressure. The constitutive model of cohesive soil based on the DSC theory was verified by the test results. The research shows that the theoretical analysis is in good agreement with the results of tests.

Key words: cohesive soil, soil mechanical properties disturbed state concept (DSC), constitutive model, triaxial shear test

CLC Number:

TU447

CHEN Jin-jian, WU Gang, WANG Jian-hua, HAO Jia. Disturbed State Concept Model for Studying on Mechanical Characteristics of Saturated Cohesive Soils[J]. Journal of Shanghai Jiao Tong University, 2004, 38(06): 952-955.

Figures/Tables 8

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Tab. 1

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Tab. 2

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References 6

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层号	名称	含水量/%	孔隙比	d/(g·m^-3)	比重	液限/%	塑限/%	土样埋深/m
④	淤泥质粘土	52.43	1.73	1.41	2.74	44.04	23.27	13.5～15.0
⑤	粘土	39.51	1.79	1.13	2.73	39.46	22.27	19.0～21.0

e₃/kPa	淤泥质粘土				粘土
e₃/kPa	Eⁱ/MPa	TEⁱ/MPa	T	R²	Eⁱ/MPa	TEⁱ/MPa	T	R²
50	2.595	4.328	1.668	0.967	—	—	—	—
100	8.773	14.488	1.651	0.964	5.216	9.579	1.836	0.916
200	16.623	25.190	1.515	0.953	13.385	22.472	1.679	0.951
300	19.170	26.559	1.385	0.992	10.763	15.353	1.426	0.908
400	25.634	40.717	1.588	0.936	15.214	23.529	1.547	0.949

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