Research On Stability Analysis And Treatment Techniques Of A Talus Slide In216Provincial Highway, Muli County

This paper aims to study stability analysis of landslide and treatment design of anti-slide pile. Relationship between the causes of landslide and geologic environment, earthquake, human factors is introduced. Stability analysis of landslide, calculation method of thrust, design procedure and computation theory of anti-slide pile are expounded in detail. There are taken an example research on stability analysis of landslide and design of anti-slide pile for the prevention and treatment engineering of a talus slide of216provincial highway in Liangshan Muli County. Based on the understanding of landslide engineering geological condition, deformation behavior and causes of talus slide are analysed. Imbalance thrust force method in limit equilibrium analysis method and qualitative evaluation method are used to calculating safety factor of slope stability and landslide thrust under different working conditions. During the calculation of internal force of anti-slide pile with cantilever pile calculating method, anti-slide pile is separated into load-bearing section and anchoring section. Longitudinal main reinforcement and stirrup of anti-slide pile are reinforced. For project monitoring of construction safety, control efficiency and long process of landslide deformation, monitoring scheme of landslide treatment is formulated in detail.After a series of analyse on the talus slide, main conclusions as follow are gained.1. Although there are many factors that influence the stability of landslide, formation lithology and geological structure of landslide, structure of rock mass, groundwater and surface water, earthquakes and human activities are mainly controlling factors. Identifying and grasping these controlling factors, understanding the relationship between these factors and causes of landslide are very necessary for studying stability of landslide and designing preventive measures.2. The front part of the example landslide is free and slide seriously. There are many cracks in the back and the side part of this landslide. Development signs of the landslide cracks are obvious in rainy season. The qualitative analysis and quantitative calculation of landslide stability show that landslide is in a creep deformation state under natural condition, the whole slope is understable; under wet season or earthquake conditions, the landslide will further deform until it is instability.3. According to the engineering geological conditions of the landslide area, a treatment scheme about unloading slope at the inside highway and setting anti-slide pile at the outside highway in landslide area is presented. Cantilever pile calculating method is taken to calculate of internal force of anti-slide pile. Meanwhile, the foundation strength and the longitudinal reinforcement, stirrups, structural reinforcement, erect steel in a anti-slide pile meet the demand of pile stress and related standards.4. For understanding the stable state of landslide and existing buildings at all time, guiding the construction, fedding back design, testing treatment effect, this dissertation offers a monitoring scheme of the landslide treatment. Through post-construction monitoring, the monitoring value of displacement of anti-slide pile cap and gradient can be compared with theoretical value. Then error causes between them and treatment effect are analyzed.