Research On Prevention And Control Technology Of Shuanglongyan Landslide In Shiyan City

Landslide As the most common geological disaster,has brought great impact on people's life and production.The stability analysis and prevention program research is a topic related to people's livelihood and is of great significance.This paper takes the Shuanglongyan landslide in Shiyan City as the research object.Through the field investigation and the geological survey data,the stability of the natural and saturated landslides is analyzed by the unbalanced reasoning method and the FLAC3 D numerical simulation method.The results of comprehensive analysis are used to design and optimize the control plan.The main contents and research results of the thesis are as follows:(1)Through the investigation of the geological environment and basic characteristics of the landslide,the formation mechanism and influencing factors of the landslide are determined,and the stability of the landslide is qualitatively analyzed.The analysis shows that the landslide is in a basic stable state under natural conditions,and there is small-scale deformation and sliding.However,it has the possibility of overall sliding under heavy rainfall conditions.(2)The unbalanced thrust method is used to analyze and evaluate the stability of Shuanglongyan landslide.The analysis results show that the landslide is in a basically stable state under natural conditions;in the saturated state,the landslide is in an unstable state(3)Using the FLAC3 D software-based self-compression strength reduction method to numerically simulate the landslide.Comparing the cloud maps under natural and saturated conditions,the maximum shear strain increment value,displacement value and principal stress value under saturated conditions are natural.Working conditions have increased.From the maximum shear strain increment cloud map,the potential slip surface is the interface of rock and soil.The comprehensive analysis of the upper part of the 2-2? section,the foot of the 3-3? section and the upper edge are relatively more unstable.The stability coefficient obtained by the FLAC3 D self-composed strength reduction method is slightly smaller than that of the unbalanced reasoning method,but the stability evaluation results of the two working conditions are consistent.(4)In order to ensure the safety of people's lives and property and the future construction of the project,it is necessary to control the landslide.Two prevention and control schemes were proposed and designed: scheme 1: anti-slide pile + surface drainage + monitoring,scheme 2: anti-slide pile + anchor cable grid + retaining wall + surface drainage + monitoring.(5)The two prevention and control schemes are compared and optimized from three aspects: technical scheme,construction technology and investment estimation.The scheme 1 is obtained: anti-slide pile + surface drainage + monitoring is the optimal scheme.