Abstract:

Gravel soil landslide is a type of landslide which initiates sliding failure under rainfall action. In order to realize comprehensive treatment and evaluation decision of landslide, it is an unnegligible research subject that how to proceed treatment stability analysis and effect evaluation of gravel soil landslide. Based on the actual geological condition and the situation of deformation failure of Guanjia landslide, the deformation failure mechanism is studied and the influence factors of landslide stability are analyzed. Based on these, programming and disposition of engineering treatment and stability analysis of landslide are implemented. Then, with reference to rainfall and landslide deformation, the load-unload response ratio model is constructed to feedback the stable state of landslide and evaluate the effect of engineering treatment. The research results show as follows: Rainfall action or groundwater variation is the main dynamic factor of deformation failure of gravel soil landslide. According to the principle of drainage and antislide, the comprehensive disposal measures of landslide treatment are determined. Through stability analysis, the safty coefficients of landslide improve obviously, which also can completely satisfy the standard requirement which demands the coefficients are no less than 1.25. Moreover, based on the load-unload response ratio model analysis, the landslide is in a safe and stable state nowadays by comprehensive treatment. The treatment measures are implemented scientifically and rationally, and the effect of engineering treatment is significant. Through the comprehensive action, the landslide has well stability, and is safe and reliable.

Key words: gravel soil landslide, deformation failure, engineering treatment, stability analysis, state feedback, effect evaluation