Analysis On Stability And Governance Of Landslide In The N8Section Of The Highway From Shanzhou To Manchuanguan

In recent years, slope slump caused by natural disasters and human engineering activities occurred frequently, landslide caused by the disaster lead to the incalculable casualties and property losses around the world. Therefore, studying the landslide stability and developing the governance program has been our concern and major issue in the field of engineering.As a graduate, the author took part in the job four years ago. He as a technician joined the construction of the highway landslide in N8section from Shangzhou to Manchuanguan, which was constructed by China Railway12th Bureau Group3rd Limited Corporation. Moreover, he also demonstrated the anchor cable frame beams that were designed by Chang’an University Highway Research Institute. After more than one year’s geological survey, investigation, stability analysis and the construction of anchor cable frame beam and made the author have love feeling toward the landslide governance. Therefore, the author decides to make numerical simulation to the landslide and further demonstrates its governance program with the gradual understanding of the ANSYS finite element software in the post-graduate period.First of all, made the decline force calculation to the three typical sections of the landslide and analyze its stability by using the limit equilibrium method. The result showed that it is difficult to form balance by landslide itself and so it is necessary to conduct the engineering measures governance. Then, re-examine the design of the anchor cable frame beam and the construction management process of the landslide. Last, stimulate the landslide by using ANSYS finite element software and analyze the landslide displacement and stress changes under the three conditions:the landslide before excavation; the landslide after the excavation that was not governed; the landslide after excavation that was governed. The conclusions are as follows:①The maximum displacement was in the slope angle before excavation. The maximum stress occurred at the top of the accumulation body and the anchor reinforcement formation. Therefore, the governance of the landslide must brush the slope first and it needs brushing from the upper part.②The maximum displacement respectively occurred on the landslide top and at its base after excavation and before the governance. The maximum stress occurred at its base So, the landslide top and its base area should be given prevention when it was constructed and governed, for example, lengthening and encrypting the anchor cable.③The maximum displacement respectively occurred on the landslide top and at its base after governance. The maximum stress occurred at the intersection of the landslide base anchor cable reinforcement strata and class Ⅱ surrounding rock. So the landslide top area should be set the passive prevention net in order to prevent the gravel slide.④The reinforcement landslide should be monitored after putting it into use. Grasp the slope developments and judge the quality and effectiveness of the governance measures by monitoring the data.The thesis is based on the actual landslide engineering geological survey, analysis, research and stability calculation, provides a set of working methods for the later landslide engineering analysis and also provides a theoretical basis and practical guidance for future similar projects.