Analysis Of Gaoqiao Landslide In Pihe River Main Canal And Study On Its Control Measures

Since ancient times,landslide has been paid more and more attention because of its wide range of influence,large number of victims and great economic losses.Most of the landslides are produced under the joint action of the internal conditions of formation lithology and geological structure and the external conditions such as rainfall and earthquake.Based on the continuing construction and water-saving reconstruction project of Pishihang Irrigation District in Anhui Province,this paper takes the landslide of Gaoqiao cutting ridge section in Pishihang Irrigation District as the research object,analyzes and grasps the characteristics of Gaoqiao landslide through the cause of formation analysis,rationality demonstration of design scheme and monitoring after the completion of the project,so as to provide technology for later project management Support..Firstly,based on the data induction and field investigation,this paper analyzes the characteristics and causes of Gaoqiao landslide from the aspects of soil properties,slope shape conditions and hydrogeological conditions.Then,using Geo-Studio software combined with the actual operation conditions of Gaoqiao landslide,the slope stability analysis of the typical section of Gaoqiao landslide was carried out.Considering the actual formation of the landslide,rainfall was taken as the direct inducement of the landslide,and Geo-studio was used Slope/W and Seep/W modules in the software analyze Gaoqiao landslide,focusing on the slope stability of four landslides under different rainfall types,and explore the impact of different rainfall conditions on the stability of each landslide.This paper analyzes and optimizes the original scheme based on the previous design scheme of Gaoqiao landslide project.In order to master the specific effect of the project,the soil pressure at the retaining side of the anti slide pile,the front and rear of the anti slide pile and the position between the piles were monitored.According to the data obtained during the monitoring period,the deformation and stress changes of the slope after the treatment are analyzed.The results show that the deformation of the slope is very small and the whole slope is stable in a period of time after the construction.The later long-term monitoring will provide technical support for the later project management.