Rock Slope Rainfall Disaster And Support Optimization Research

Due to China’s extremely complex topography and geological conditions, geological disasters occurred frequently. Slope instability destruction phenomenon also can be seen everywhere. Slope type exception is numerous, bedding rock slope is one of the main types of slope along the slope, there are many factors affecting the stability of slope, and in the western region, especially in southwest China,rain is the common factor of the slope unstability. it is also very important factors to the normal construction and operation of high-speed railway constitutes a great threat. According to statistics, more than 90% of landslide and rainfall is extremely close. And the rock slope problems encountered in engineering more and more, not enough research on mechanism of rock slope sliding and improper supporting research can have serious consequences, that produces an estimate of the casualties and property losses. In recent years "geotechnical anchoring technology" in the governance of rock slope is dominant. Principle of geotechnical anchoring technique by embedding strata and structures on the formation of bolt together. The tensile stress in the structure will be able to effectively to the rock mass, so that can ensure to maintain long-term stability in geotechnical engineering. Geotechnical anchoring technique become solve the problem of geotechnical engineering, and it is the most effective and economic method.In this paper, based on gui-guang railway, along the railway worksite, selecting typical worksite K307, using The numerical simulation method and using midas-gts. the more rainfall infiltration were studied under the action of seepage law of bedding rock slope and the changing rule of the mechanical behavior of slope, and explore the instability mechanism of slope. Detailed analysis of anchor bolt support and the system supporting the role of rock slope under rainfall effecting and comparative analysis. In this paper, the main achievements are as follows:Seepage properties of weathered rock mass slope and weak interlayer and mechanical properties are analyzed, and discussed the rock slope stability under rainfall analysis theory and the stability coefficient algorithm, using this algorithm to solve some engineering examples. Rock slope was analyzed for calculating anchorage force of bolt support can offer.According to the actual worksite of slope, using midas-gts sumulate two groups of rock slope under rainfall,we will discuss the Pore pressure change rule,and the slope seepage velocity changes of all kinds, and analyse the slope displacement after the rain and the safety factor.About 25°,30°,35° three kinds of rock quality slope using bolt support, changing the Angle of bolt support (15°,22.5°,30° and 45°) and spacing (2 m,3 m),we will discuss all kinds of the optimum tilt Angle of the slope anchor, bolt supporting. and the change of the Angle and spacing of supporting effect influence degree of the slope, the sensitive degree of different. And each slope anchor, the change of the internal force are discussed.