Influence of Matric Suction and Counterface Roughness on Shearing Behavior of Completely Decomposed Granitic Soil and Steel Interface

被引：17

作者：

Borana L. ^{[1
]}

Yin J.-H. ^{[1
,2
]}

Singh D.N. ^{[3
]}

Shukla S.K. ^{[4
]}

机构：

[1] Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon

[2] PolyU Shenzhen Research Institute, Shenzhen

[3] Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai

[4] Department of Civil Engineering, Edith Cowan University, Joondalup, Perth

来源：

Indian Geotechnical Journal | 2017年 / 47卷 / 02期

关键词：

Completely decomposed granite; Counterface; Direct shear test; Interface; Matric suction; Soil dilatancy; Unsaturated soil;

D O I：

10.1007/s40098-016-0205-7

中图分类号：

学科分类号：

摘要：

The interface can be defined as the zone in which the transfer of stresses occurs between soil and structure. The behavior interface is significantly influenced by stress state variables. In this paper, the influence of matric suction and counterface roughness on the interface shearing behavior was examined by conducting a series of suction controlled direct shear test on the interface formed between completely decomposed granite soil and steel specimens. Experimental tests were performed on two different types of soil–steel interfaces under different stress state variables. Test results show that matric suction has a significant influence on the interface shear behavior. The counterface roughness influences the dilative-contractive behavior of the interface. The critical interface shear strength at specific counterface roughness and net normal stress is controlled by the matric suction. The experimental results are compared with an analytical model that considers the influence of suction and dilation on apparent interface friction angle. The analytical model works reasonably well for predicting the unsaturated soil–steel interface shear strength under different stress state variables. © 2016, Indian Geotechnical Society.

引用

页码：150 / 160

页数：10

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