碎石土滑坡综合治理及评价决策方法

Comprehensive Treatment and Evaluation Decision Method of Gravel Soil Landslide

碎石土滑坡是一类由降雨激发失稳而产生滑动破坏的滑坡类型,要实现对其综合治理和评价决策,滑坡治理稳定性分析及效果评价就不容忽视。基于官家滑坡实际地质条件和变形破坏情况进行变形破坏机制研究和稳定性影响因素分析,在此基础上实施滑坡工程治理规划处置和治理稳定性分析,然后再参照降雨及滑坡变形情况构建加卸载响应比模型来实现滑坡稳定状态反馈和工程治理效果评价。研究表明:降雨作用及地下水变化是碎石土滑坡变形破坏最主要的动力因素,滑坡工程治理依据排水及抗滑原则确定综合处置措施,经治理稳定性分析,其稳定系数可大幅提高,完全满足不低于1.25的规范要求;并且基于加卸载响应比模型分析滑坡经综合治理后处于安全稳定状态,工程治理措施实施科学合理,工程治理效果显著,综合作用下滑坡稳定性好、安全可靠。

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.