CHARACTERISTICS AND DEFORMATION MECHANISM OF SHUIWAN SEISMIC LOESS LANDSLIDE IN MAIJI, TIANSHUI

LI Hao; YANG Wei-min; HUANG Xiao; LIU Ting; TIAN You; CHENG Xiao-jie

Volume 22 Issue 1

Mar. 2016

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Article Navigation > Journal of Geomechanics > 2016 > 22(1): 12-24

LI Hao, YANG Wei-min, HUANG Xiao, et al., 2016. CHARACTERISTICS AND DEFORMATION MECHANISM OF SHUIWAN SEISMIC LOESS LANDSLIDE IN MAIJI, TIANSHUI. Journal of Geomechanics, 22 (1): 12-24.

Citation:

LI Hao, YANG Wei-min, HUANG Xiao, et al., 2016. CHARACTERISTICS AND DEFORMATION MECHANISM OF SHUIWAN SEISMIC LOESS LANDSLIDE IN MAIJI, TIANSHUI. Journal of Geomechanics, 22 (1): 12-24.

Citation:

LI Hao, YANG Wei-min, HUANG Xiao, et al., 2016. CHARACTERISTICS AND DEFORMATION MECHANISM OF SHUIWAN SEISMIC LOESS LANDSLIDE IN MAIJI, TIANSHUI. Journal of Geomechanics, 22 (1): 12-24.

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CHARACTERISTICS AND DEFORMATION MECHANISM OF SHUIWAN SEISMIC LOESS LANDSLIDE IN MAIJI, TIANSHUI

LI Hao^{1, 2
,},
YANG Wei-min^{1
,
,},
HUANG Xiao³,
LIU Ting^{1, 2},
TIAN You^{1, 2},
CHENG Xiao-jie¹

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
School of Geosciences and Resources, China University of Geosciences, Beijing 100083, China
3.
Huihua College of Hebei Normal University, Shijiazhuang 050091, China

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Abstract

Abstract

Many historical earthquakes happened in Tianshui and its adjacent region, which resulted in seismic loess landslides developing extremely. According to field survey and indoor synthetic analysis, Shuiwan landslide and landslide groups of Liugou belong to typical seismic loess landslides, which are usually performance for large-scale, the sliding surface cutting deeply, thickness greatly, small slope, distributed along zones, appeared in groups and decline in high position and other characteristics. The characteristics above can be used as important symbols of field identification of seismic loess landslides. The slopes involved in Shuiwan landslide and the right bank Liugou landslides are characterized by loess/mudstone slope double layers structure. Under the condition of internal power, it is easy to slip along the loess/mudstone contact surfaces. Under the dynamic circulative loading, shear strength of the landslide rock mass is decreased on one hand. On the other hand it also changes the mechanical status of landslide, and the balance of the slope body is destroyed, which induce landslide happened. So, Shuiwan landslide is still in understable state. In case of an earthquake or heavy rainfall, it is likely to reoccur again. There is a necessary for further research of the disaster model of seismic loess landslide. It will provide a scientific basis for prevention and mitigation disaster of potential meizoseismal area.
- Shuiwan-Maiji,
- seismic loess landslide,
- seismic force,
- deformation and failure,
- deformation mechanism

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References

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