Rate effect of residual strength of slip soils and its impact on deformation process of landslides

被引：1

作者：

Wang L. ^{[1
]}

Yan E. ^{[1
]}

Song K. ^{[2
]}

Yang G. ^{[1
]}

Wang J. ^{[1
]}

机构：

[1] Faculty of Engineering, China University of Geosciences, Wuhan

[2] Collaborative Innovation Center for Geo-hazards and Eco-environment in Three Gorges Area, China Three Gorges University, Yichang

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2017年 / 48卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Deformation process; Rate effect; Residual strength; Slip soils;

D O I：

10.11817/j.issn.1672-7207.2017.12.028

中图分类号：

学科分类号：

摘要：

Using ring-shear testing on reconstituted soil samples from the Sanjiaotan landslide over a wide shearing rate, the impact of shearing rates on the residual strength of slip soils and the influence of moisture content on the rate effect were studied. The relationship between the rate effect and the deformation process of landslide is explored by the numerical simulation technology. The results show that the residual strength of samples is positively dependent on the shearing rates. The equation which quantitatively assesses three types of rate effects is presented: φr=Aln(v)+B, in which A is the rate effect coefficient. The residual strength of slip soils can display different types and violent degree of rate effects, accompanying A. Due to the viscosity of soils and the alignment of clay particles, the value of A increases firstly, and then decreases with the increment of moisture content in the positive rate effect. Affected by the positive rate effect, the residual strength of slip soils presents a dynamic change. It determines the process from active stage to stable stage of landslides. In summary, the rate effect on residual strength of slip soils plays a decisive role in the deformation process. © 2017, Central South University Press. All right reserved.

引用

页码：3350 / 3358

页数：8

共 29 条

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