Bounding Surface Model and Parameters Study on Describing the Behavior of Cement-treated Clay with Cementation Degradation

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Bounding Surface Model and Parameters Study on Describing the Behavior of Cement-treated Clay with Cementation Degradation

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[1]YAN Fuyou,CUI Hao,LI Junchao,et al.Bounding Surface Model and Parameters Study on Describing the Behavior of Cement-treated Clay with Cementation Degradation[J].Journal of Zhengzhou University (Engineering Science),2021,42(01):63-69.[doi:10.13705/j.issn.1671-6833.2021.01.010]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 42卷 Number of periods: 2021 01 Page number: 63-69 Column: Public date: 2021-03-14

Title:: Bounding Surface Model and Parameters Study on Describing the Behavior of Cement-treated Clay with Cementation Degradation

Author(s):: YAN Fuyou1; CUI Hao2; LI Junchao1; GAO Xinjun1; 1.School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China; 2.School of Civil Engineering, Chongqing University, Chongqing 400044, China

Keywords:: cement-treated clay; cementation degradation; bounding surface model; parametric estimation

CLC:: TU43

DOI:: 10.13705/j.issn.1671-6833.2021.01.010

Abstract:: Based on the concept of modified mean effective stress, the effect of cementitious bonding and the loss of bonding during loading for cement-treated clay were described, in which most of the parameters could be got automatically by program calculation except for a few parameters estimated by other software. And then, the bounding surface model with two surfaces was developed in order to describe the behaviour of cementation and cementation degradation of cement-treated clay, and the basic model parameters were selected in the deviator strain and deviator stress plane from undrained shear tests. The reliability and correctness of the proposed constitutive model and their parametric estimation methods were shown by comparing the simulation and test results of the undrained shear tests from the literature under different confining pressure for different kinds and different cement contents cement-treated clay. Finally, to further illustrate the advantages of the proposed model, a numerical example was conducted on triaxial undrained shear test under cyclic loading condition for cement-treated clay, and the results showed that it could reveal the main stress-strain characteristics of cement-treated clay such as stress, excess pore water pressure and stress path and so on under cyclic loading condition.

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Last Update: 2021-03-15