Experimental Research On Landslide Mechanism And Control Of Weathered Rock Slope Under Heavy Rain Conditions

In recent years, the massive infrastructure and open-pit mining has brought many problems on stability of side slope. People have already paid much attention to the forecast of Landslide Geology in Disasters. Seen from the massive research results, we can know that the landslide production has a close relation to rainfall. The percolating water and slope water produced by rainfall can reduce the mechanical properties of side slope soil, and it is a important reason that trigger the rainfall landslide.This article uses the room cast experiment and method of theoretical analysis to explore transfusion and the landslide mechanism of mantle rock side slope under the condition of rainfall. The main work includes:(1) According to the orthogonal experiment principle, it takes dry weight density of the side slope soil, the initial moisture content and the rainfall intensity for three influence factors, designing experiment under rainfall to know the change of Seepage field and landslide characteristics from Completely weathered granite slope. Analysis show the latter stable Slope hydrocephalus, the much maximum water and the latter Stable penetration. The time of Slope hydrocephalus is identical to the time of stable seepage, and the time of maximum water can be seen as the harbinger of landslide.(2) The model tests reveal the landslide characteristics of weathered rock slope is shallow landslide with large area.(3) To obtain the drift net chart by using the drift net law, in this foundation to count the stability of ground seepage destruction though hydraulic gradient law, and finally,to put forward a theoretical formula of platform erosion destruction.(4) Using the critical gradient formula of streaming soil in platform, we calculate the safety factor of the test slope calculation, and predict the form and position of landslide. Have a compare between the predicted results and experimental slope phenomenon,the results show that the platform flow of soil destruction formula groove more accurately predict of the form and location of landslide. We conclude that the formula can be used as the foundation of rainfall-landslide.(5) Form the point of slope control by drainage, we have a slope rainfall experiment under the condition of sewer draining., and show that the sewer is effectiveness to slope control. By a comparisons with the sewer, we fond the blind ditch have a better governance to landslide. This formula can be used not only the slope seepage field, but also the sewer blind ditch project essay.