Study On The Effect Of Rainfall To Anbushan Landslide

Long Wan in Zhejiang Province is one of the three major cities ofWenzhou where the local average annual rainfall is about1800mm. It is thewetter areas of China, but also the frequency of landslide prone areas. Basedon the mechanism of rainfall-induced landslide disaster prevention technologyis a topic of concern in geotechnical engineering practice. In view of theuniversality and the recent rainfall rainfall-induced the frequency oflandslides, it is great significant for similar landslide hazard control theory andtechnology research.Based on previous research results to study the An Bu Shan landslide, usingplaxis finite element analysis software, divided into different rainfall, rainfallintensity, rainfall duration to be considered under seepage slope deformationin-depth analysis shows that when the An Bu Shan landslide permeabilitycoefficient is large relative to the rainfall intensity, the greater rainfall andthe longer lasted, the more infiltration of rain water into the landslide bodyand the formation of seepage force has greater impact on the landslide; Underthe same rainfall intensity, The greater rainfall and longer lasted, the greaterdeformation landslide generated, and deformation of the larger sites areconcentrated in the foot of the slope; This article first use of strengthreduction to evaluate the stability of the landslide, and then discuss theimpact of rainfall on landslide stability, but also by the shear stress incrementfigure can be inferred the potential landslide slip surface in all-highlyweathered near the contact surface, This is consistent with the results of fieldsurvey.On this basis, through the engineering geological conditions of An BuShan landslide and landslide failure mechanism of the deformation analysis, itis easy to design a comprehensive management programs. Finally, FLAC3Dsoftware used to simulate the effect of reinforcement.The results show that: sliding wall can effectively prevent the continueddeformation of Landslide and the anchors can inhibit the proliferation of the slope stress and reduce distortion and improve slope stability. Therefore, itproved control measures can play a good treatment effect, provide a referencefor similar projects.This research results in numerical analysis landslide has done a usefulattempt. By careful design of numerical model and in-depth and detailedanalysis.it is not only make me a better understanding of the sliding wall andanchor′s working mechanism and laws, but also provide useful reference data,with some Theory of meaning and value in use for the numerical simulation oflandslide.