Mechanism Analysis And Treatment Of Tunnel Diseases Caused By Landslide

In this paper,Nanping Dazhun railway tunnel as the engineering background,in view of the left tunnel operation process of slope landslide caused by local tunnel cracks,dislocation and other damage to the outage engineering problems of rectification,do the stability analysis of tunnel slope stability and puts forward effective measures.There are several aspects of scientific research:(1)By consulting the domestic and international literature on the slope stability analysis of the literature,analysis the causes of tunnel landslide hazards,understanding of domestic and foreign landslide stability analysis methods and the latest research status of landslide control measures.(2)According to the geological exploration data and field survey,the scale and form,geological and meteorological and hydrological survey of Nanping tunnel are introduced in detail,and briefly introduces the development situation of slope sliding caused by tunnel diseases.(3)Doing a detailed investigation on the situation of supporting structure and outside slope disease disease branch tunnel,grasp the location and distribution of the disease,the number of disease development.(4)According to the survey data and combining with the practical project,by using GEO-SLOPE software of slope stability,slope stability analysis of two-dimensional tunnel,the calculated cross section location of sliding surface and safety coefficient,and the calculated each section's sliding surface position and the actual drilling location of slip surface for comparative analysis.(5)By using the large finite element software ANSYS to establish three-dimensional finite element model of slope tunnel,simulating the landslide by using strength reduction method,analyzing the impact of landslide on the existing tunnel and the cause of the disease and to guide the tunnel disease control(6)According to the field survey of tunnel disease data and numericalsimulation results,the actual tunnel cracks,the seepage,dislocation,swelling and other issues put forward the corresponding measures for the landslide,and provides reference for analysis and repair of tunnel disease.