Research On Disaster Mechanism And Prevention Measures Of Large Tractive Soil Landslide

Landslides is a common geological disaster in China.Today,with the rapid economic development of our country,human engineering activities are gradually intensifying.Under natural factors,landslides have become the most frequent and most harmful disaster,and it is increasing year by year.Among them,large-scale traction soil landslides are widespread types of landslides.The catastrophic mechanism of this landslide is not clear,and the impact of disasters is extensive,often causing substantial economic losses,and even causing devastating damage.This paper takes Lianghekou landslide in Shizi Town,Yanjin County,Zhaotong City,Yunnan Province as an example.Based on a large number of research related literature reviews and field survey data,the landslide stability evaluation and control engineering design are carried out based on the analysis of the basic geological characteristics and genetic mechanism of the landslide..The research findings are as follows:(1)Lianghekou landslides are classified into H1 landslides,H2 landslides and BW potential unstable slopes according to different sliding periods,sliding directions and stability.The formation and evolution of landslides is the result of the joint effect of the formation of slope materials,uninterrupted rainstorms,groundwater infiltration,and the development of engineering activities.(2)Analyze and evaluate the stability of Lianghekou landslide using a combination of qualitative and quantitative methods.Quantitative analysis uses limit equilibrium method and numerical simulation method to calculate the landslide stability,and draws the conclusion: natural and seismic conditions The landslide is generally stable;under heavy rain conditions,H1 landslide is in an under-stable state under heavy rain conditions,and H2 landslide is in an under-stable?unstable state;BW potential unstable slopes are basically stable under heavy rain conditions.? Stable state,and also confirmed that the Lianghekou landslide is a large-scale traction soil landslide.(3)Fully consider the development characteristics and stability of the landslide,and formulate "anti-slide pile support + anchor pile support + pile-slab retaining wall + cut-off drainage project" and "anti-slide support + slope cutting and load reduction + pile-slab type" The prevention and treatment plan of retaining wall + interception and drainage project,through comprehensive comparison and selection of economy,technology,construction,etc.,finally determined the “anti-slide pile support + anchor pile support +pile-slab retaining wall + interception and drainage” Engineering and integrated treatment plan with engineering monitoring.On this basis,the landslide prevention and control sub-project design calculation is carried out to make the landslide stability meet the design standards.The related results of this paper basically clarified the geological environmental conditions for the development of large-scale towed soil slopes,ascertained the development characteristics and formation mechanism of landslides,and gave the best treatment measures through the necessary selection and optimized design of the project.The survey and design provide theoretical schemes that can be referred to,and have certain scientific significance.