Creep behavior of unsaturated reticulate red clay under matric suction

2017 ◽  
Vol 22 (2) ◽  
pp. 582-587 ◽  
Author(s):  
Jianzhong Li ◽  
Yuanli Yang
Keyword(s):  
Creep Behavior ◽  
Matric Suction ◽  
Red Clay ◽  
Reticulate Red Clay

scholarly journals Experimental Study on Viscoplastic Property of Unsaturated Reticulate Red Clay Used as an Engineered Barrier

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Chuang Zhang ◽  
Jian-Zhong Li ◽  
Yong He
Keyword(s):  
Axial Strain ◽  
Confining Pressure ◽  
Matric Suction ◽  
Triaxial Tests ◽  
Red Clay ◽  
Reticulate Red Clay ◽  
Confining Pressures ◽  
Loading Tests ◽  
Engineered Barrier ◽  
The Relationship

In this study, to explore the feasibility of a compacted red clay as an engineered barrier in landfills, the viscoplastic property of remodeled unsaturated reticulate red clay was studied through a series of triaxial tests. According to the deviatoric stress–axial strain curves obtained through loading tests with varying strain rates and under different conditions, the viscoplastic parameter β of remodeled reticulate red clay was obtained. The effects of different matric suctions and net confining pressures on the viscoplasticity of unsaturated reticulate clay were analyzed. The test results showed that remodeled reticulate red clays with different degrees of saturation have similar viscoplastic properties, and their stress–strain curves are all isotach. The stiffness of unsaturated reticulate red clay increased with increasing confining pressure and matric suction. The relationship between β and the net confining pressure can be described using a linear equation. The β value of the specimens increased with increasing matric suction under a constant net confining pressure. A similar linear relationship was observed between β and the matric suction. These relationships are explained considering the loading rate effect mechanism.

scholarly journals Creep Behavior of Red-Clay Under Triaxial Compression Condition

2020 ◽  
Vol 7 ◽  
Author(s):  
Kaixi Xue ◽  
Shengfu Wang ◽  
Yanxiang Hu ◽  
Mingdong Li
Keyword(s):  
Creep Behavior ◽  
Triaxial Compression ◽  
Red Clay ◽  
Compression Condition

Creep Property of Reticulate Red Clay under Stepped-Load Creep Tests

2012 ◽  
Vol 446-449 ◽  
pp. 1412-1416
Author(s):  
Jian Zhong Li ◽  
Yan Fu Cao ◽  
Ya Jun Qing
Keyword(s):  
Creep Property ◽  
Creep Tests ◽  
Red Clay ◽  
Reticulate Red Clay

Behavior of Cemented Reticulate Red Clay

2012 ◽  
Vol 446-449 ◽  
pp. 1666-1669 ◽  
Author(s):  
Jian Zhong Li ◽  
Li Chun Zhuo ◽  
Xi Ni
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Cement Content ◽  
Axial Strain ◽  
Test Results ◽  
Compression Tests ◽  
Red Clay ◽  
Reticulate Red Clay ◽  
Strain Deviator ◽  
Relationship Of

Mechanical properties of cemented reticulate red clay were studied in present research. Test results show that: (1) shear strength of cemented reticulate red clay increase exponentially as the increasing of cement content; (2) shear strength of cemented reticulate red clay decrease polynomially as the increasing of water content; (3) mechanical properties of cemented reticulate red clay affected significantly by curing time and curing confined pressure. In order to study viscous properties of cemented reticulate red clay, cemented reticulate red clay specimens were compressed in triaxial chamber at different shear rate. Results of the compression tests show that it is obvious that the axial strain-deviator stress relationship of cemented reticulate red clay affects by the strain rate.

Grain-size evidence for multiple origins of the reticulate red clay in southern China

2005 ◽  
Vol 50 (9) ◽  
pp. 910-918 ◽  
Author(s):  
Hu Xuefeng ◽  
Zhu Yu ◽  
Shen Mingneng
Keyword(s):  
Grain Size ◽  
Southern China ◽  
Red Clay ◽  
Multiple Origins ◽  
Reticulate Red Clay

Research on suction equilibrium time of unsaturated reticulate red clay

2017 ◽  
Vol 22 (2) ◽  
pp. 565-571 ◽  
Author(s):  
Jianzhong Li ◽  
Kangning Hao ◽  
Peng Feng
Keyword(s):  
Red Clay ◽  
Equilibrium Time ◽  
Reticulate Red Clay ◽  
Suction Equilibrium

Triaxial Test of Unsaturated Clay and the Engineering Application at the Naji Reservoir in Guangxi Province

2012 ◽  
Vol 594-597 ◽  
pp. 327-334
Author(s):  
Dian Guang Ma ◽  
Zhi Kai Zhang ◽  
Yuan Zhan Wang
Keyword(s):  
Triaxial Test ◽  
Matric Suction ◽  
Water Infiltration ◽  
Numerical Verification ◽  
Guangxi Province ◽  
Red Clay ◽  
Stress Strain ◽  
Finite Element Software ◽  
Coulomb Model ◽  
Chang Model

Torrential or atomized rain is one of the key factors that lead to slope deformation and failure. With rain water infiltration, the pore pressure increases and the matric suction decreases even lose, which lead to the soil shear strength sharply reduced and the slope destabilized. This paper selects the in-situ red clay of the Naji reservoir in Guangxi province as research object and investigates the stress-strain characteristics of undisturbed unsaturated red clay under different matric suction conditions by the triaxial test. The numerical verification of test results is conducted by finite element software ABAQUS, using Duncan-Chang model and Mohr-Coulomb model respectively. Comparing with the Duncan-Chang model, Mohr-Coulomb model can reflect the stress-strain behavior of red clay better. And the slope stability of the project in rainfall condition is analyzed by numerical model, which would offer references for the implementation of the revetment engineering.

Simulation on Triaxial Compression Creep Deformation of Reticulate Red Clay

2011 ◽  
Vol 261-263 ◽  
pp. 1414-1418 ◽  
Author(s):  
Jian Zhong Li ◽  
Xi Qing Tang ◽  
Lu Chao Yan
Keyword(s):  
Creep Deformation ◽  
Triaxial Compression ◽  
Lake Area ◽  
Compression Tests ◽  
Creep Tests ◽  
Red Clay ◽  
Creep Stress ◽  
Compression Creep ◽  
Reticulate Red Clay ◽  
Laboratory Test Results

Triaxial compression creep tests were performed on the undisturbed specimens of reticulate red clay from Dongting Lake area (China) under different confined stress. By analyzing the laboratory test results, following conclusions were drawn: (1) creep deformation occurred in all compression tests; (2) creep deformation increases as the increasing of the creep stress (compress stress) slightly; (3) the creep deformation occurred in the triaxial compression creep tests can be well simulated with Singh-Mitchell model.

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