Failure Mechanism And Stability Appraisal Theory Study On Layered Rock Slope In Karst Region

The bedded rock mass and Karst Environment are unique engineering geology environmental condition in large-scale engineering construction of Guizhou. From China's western development campaign, Along with Guizhou economy development, many large-scale engineering constructions develops one after another in Guizhou. The high side slope destruction also more and more becomes the question which in the Guizhou engineering construction meets frequently. Therefore, Carried on the system research to the karst area bedded rocks nature side slope and the destruction mechanism and the stable computation theory,already become the work which needed to develop urgently in the Guizhou engineering construction.This article base on the massive actual inspection in the road side slope and the predecessor in the side slope aspect research results analysis research,has carried on the comprehensive type division to the Karst area bedded rocks nature side slope, and analysis summarized each kind of bedded rocks nature side slope main distortion mechanism and the destruction pattern, then establishes the corresponding distinction basis, in the end, discussed the bedded rocks nature side slope stable computation theory and the protection design method.Base on the theory integrate with the predecessor research results, this article specifically has mainly done following several aspects work:First,side slope structural parameter(angle between Side slope trend and rock bed trend,side slope inclination angle,the rock bedded inclination angle and tendency relations)as the basis, considered the distortion destruction pattern differently, carries on the comprehensive type division to the bedded rocks nature side slope.Second, analysis and summarized each kind of bedded rocks nature side slope distortion mechanism and the destruction pattern, and through numerical simulation software FLAC to verify its distortion destruction pattern theorizes.Third, establishes each kind of destruction pattern the criterion formula.Fourth, analysis and discussion the bedded rocks nature side slope stable computation theory, not only discussed the plane sliding surface and the circular arc sliding surface two kind of common sliding surface destruction form, but also discussed the stability computational method which the overturn destruction and the block body destroyed. Fifth, summarized the bedded rocks nature side slope protection principle and the protective measure.This article for the first time combine the karst environment to the bedded rocks nature side slope from the destroy mechanism to the supports and protections design conduct the system comprehensive research, had the significant guiding sense to the Guizhou area engineering construction.