|Table of Contents|

Residual Shear Strength Characteristics of Landslide Soil in Loess Landslide of Jingyang Southern Highland, Shaanxi(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2012年第04期
Page:
95-101
Research Field:
工程地质
Publishing date:

Info

Title:
Residual Shear Strength Characteristics of Landslide Soil in Loess Landslide of Jingyang Southern Highland, Shaanxi
Author(s):
LI Wen1;  LONG Jian-hui2;  LI Tong-lu3;  LI Ping3;  ZHANG Chang-liang3
1. China Coal Xi'an Design Engineering Co., Ltd., Xi'an 710054, Shaanxi, China; 2. School of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; 3. School of Geological Engineering and Surveying, Chang'an University, Xi'an 710054, Shaanxi, China
Keywords:
loess;  paleosoil;  landslide soil;  undisturbed soil;  remolded soil;  residual shear strength
PACS:
P642.13
DOI:
-
Abstract:
In order to find the reactivation mechanism of high-speed long-distance loess landslide in Jingyang southern highland of Shaanxi, the undisturbed loess and paleosoil samples were collected from sliding zones of large loess landslides, and the remolded soils were prepared from part undisturbed soils; repeated shear tests under different volumetric moisture contents were designed, and the relationships between indexes of residual shear strength and volumetric moisture content, and cosmid content were discussed. The results showed that the shear stress-displacement curves of undisturbed soil and remolded soil were both hardening type; the difference of residual shear strengths between undisturbed soil and remolded soil was significant under different vertical pressures; when shear strength reached to peak strength, the residual shear strengths of undisturbed soil and remolded soil lost a little with the continues increase of shear displacement, and the loss was different because of the different vertical pressures; for the same kind of soils, the cohesions and internal friction angles from repeated shear tests decreased with the increase of volumetric moisture content; correlation analysis indicated that cosmid content was low in landslide soil and had little effect on internal friction angle of residual shear strength, and especially when natural volumetric moisture content was lower, the impact of the change of volumetric moisture content on residual shear strength was significantly more than the impact of cosmid content.

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Last Update: 2012-12-20