The Study On The Stability And Remedical Measures Of Meigu South Landslide

Landslide is a major multiple geographical hazard, which spreads all over the world and does a great damage. It not only damages human's life but also does destructiveness to people's property,environment and resources. Landslide happens a lot in our country and will augment in a long time. So it is emergency to enhance the study of landslide hazard and work of prevention and cure.The county of Sichuan Migu is located in a gigantic ancient accumulation. As for part of the south county deformed and glided, it threats the safety of nearby inhabitants and blocks the way. The essay is based on the detailed geographical mapping and proving locus in quo,deformation monitoring numerical data and pre-research result and analysed the character of Meigu County ancient landslide accumulation,cause and mechanism in detail.It begins with the geographical environment-poietic and deformation character . We divided the slope into superficial layer,middle layer,deep layer and discussed the inner factors of slope formation. Meanwhile , the essay used the method of limit equilibrium assay and 3D numerical value simulation analogy procedure to do profound research to the stability of deformation and slide of the south part. We predict the development tendency of the south slide and obtain the following major research result:(1) Through the analysis of the geographical exploration data and locus in quo investigation result, we know that Meigu south slide is part of the rejuvenation of Meigu ancient slide accumulation which creep and deform under the effect of the rainfall, and the slip plane is not completely holing-through, accompanying several creep and deformation belt(plane); Now the landslide mass is under the process of rejuvenation and creep, which will creep fast, form holing-through slide belt(plane) and bring about slide fast, leading to large-scale ancient landslide accumulation slide when meet strong rainfall or long term rainfall.(2) To utilize the FLAC^3D program to perform numerical simulation, it indicates that now the entirety of Meigu County south landslide is in the creep and slide state in natural condition, part of the sliding mass show destabilizing. The deformation is mainly located in superficial sliding mass while there is no deformation in latent deep layer slip plane. While calculate the result to compare the on the spot investigation with geographical analyses we know that the analysis result is primarily concordant, which indicates that the calculation model and parameter setting of Meigu County south landslide is reasonable.(3) Through the scheme comparison and selection of prevent and cure method of Meigu County south landslide, the essay aim directly at the feature of the landslide and introduced effective measure of "Setup drainage system+pare the mass and relief weight+install anti-slide pile" to cure the landslide. The enforcement of the scheme dramatically raises the stability of the superficial layer sliding mass ,does benefits to the entire stability of landslide and cure landslide in a certain degree.(4) To take comparison between the landslide monitoring data analysis result and numerical simulation analysis result, it indicates that the analysis result is primarily concordant, also the location of slip surface is completely concordant with the location that is reflected in the geographical data analysis chapter, which proves that numerical simulation analysis and geographical analysis is feasible and is basically fit for engineering practice.