Citation: | ZHU Zhi-ming, ZHOU Kai-rui, TAN Chun-hong, BIAN Jing-sheng, WEI Yuan, ZOU Zu-yin. STUDY ON TECHNOLOGY OF SLOPE/LANDSLIDE STABILITY ANALYSIS AND EARLY WARNING UNDER HEAVY RAINFALL[J]. Journal of Geomechanics, 2013, 19(4): 423-430. |
Erman mountain landslide of Han Yuan County as the example, according to the exploration of landslide site conditions and indoor test of soil parameters; Choosing a built-in VBA for development tool to develop the side (slip) slope stability analysis plug-in based on ArcGIS, which makes the study regional risk zoning assessment diagram. Results show that the special topographical condition, geological structure after the earthquake, continuous heavy rains filled water load, slope unsaturated seepage flow, increasing the pore water pressure and rapidly reducing the soil matrix suction, leads to the shear strength decreased of the slope slip plane in the soil and finally landslides. Risk zoning evaluation chart of research area based on ArcGIS and the actual situation of slide have goodness of fit. Research result provides a new way for further analyzing the effect on side slope (slip) and warning under heavy rainfall condition.
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Relationship between τf and σ different moisture content test
Moisture content on the influence of the friction Angle
Effects of moisture content of cohesive force
Structural plane
The development of interface
Main Operating interface
Single factor analysis
Coupled superposition analysis
Safety coefficient changing with time curve
Picture of risk assessment
Before the actual landslide
Actual landslide process diagram