Research On Comprehensive Protection Of Weathered Granite Slope

The granite is extremely easy to be weathered. The crusts of weathered soil body are more coarse-grained content, and they are loose structure. The crevasse is growing. The mechanical properties significantly affected by water. As the ampliative scale of infrastructure construction in recent years, engineering problems caused by weathering of granite have manifested itself. Granite geotechnical engineering characteristics and project disasters are lack of research, and there exists project application insufficiency theoretically.Connecting with Baolong and Baoteng freeway in Yunnan Province, aiming at comprehensive anti-erosion protections of the weathered granite slope, especially weak weathering layers, the, this paper launches research about granite slope of protection investigations along Baoshan-Longling freeway in Yunnan Province around 3 times for the backing.This paper summarized the basis of the predecessors'research results, and explored the causes for poor resistance to erosion of all-weathered layers from the weathered granite mineral composition, weathering mechanism and micro-structure, etc. to analyze the damaged modes of granite slope. Through the screen analysis and the weathered soil organic matter, and contents of Nitrogen, Phosphorus and Potassium test,we analyze its vegetation, site conditions; and study the feasibility of vegetation protection. Through the mechanism of water erosion, we analyze effect factors about the amount of slope runoff erosion,and establish a wider adaptive BP neural network prediction model about erosion quantity to strengthen the slope erosion resistance mechanism of the synthesis protection system. Separately from the safety of slope protection, durability, water and soil conservation,aesthetics, ecological restoration and suitability etc. we analyze granite slope protective effects along Baolong freeway, and make quantitative analysis in the rationality and practicality of comprehensive protection measures by using the fuzzy analytic hierarchy process.