Reinforcement And Excavation Of Bedding Rock Slope Stability Analysis

Deformation and instability of bedding rock slope is a common engineering geological disaster,which has the characteristics of sudden and strong destructiveness,and is widely involved in railway,house construction,hydropower and other engineering industries.In recent years,with the further development of water conservancy in the west of China,the deformation and instability of the bedding rock slope in the reservoir bank has attracted great attention from scholars at home and abroad.Especially in mountainous areas with complicated geological conditions,it is more likely to cause slope deformation and instability when constructing large-scale water conservancy projects,which is directly related to the life and property safety of people in the downstream areas of the reservoir area.Engineering practice shows that most slope deformation and instability in the reservoir area occur on the bedding rock slope with weak interlayer structure,so it is of great significance to the stability analysis of the bedding rock slope reinforcement and excavation.In this paper,based on the"stability analysis of dagou left bank slope in panjiayan foot of a water conservancy project in guizhou province",the reinforcement and excavation stability of the dagou left bank slope is analyzed by taking the dagou left bank slope as an example of the bedding rock slope.Based on the field investigation and the geotechnical test data of the indoor rock and soil mass,the engineering geological conditions are expounded,and the characteristics of the slope body such as landform and geomorphology,stratigraphic lithology,geological structure,hydrogeology and interlayer weak interlayer are analyzed,and the deformation and instability mode of the slope is considered as"slip-crack".The main causes of slope deformation and instability are artificial excavation,soft interlayer and downslope.On this basis,the reinforcement design theory of bedding rock slope is summarized,and the relevant calculation theory is deduced.Finally,the stability of slope reinforcement and excavation is simulated by using FLAC^3D software,and the displacement,plastic zone and stress characteristics of slope after graded excavation are analyzed,and the stability of slope after reinforcement is evaluated.The measured values of surface displacement,deep displacement,anti-slide pile and anchor cable stress of slope body monitored on site have proved the effectiveness of this reinforcement scheme in bedding rock slope.The research results obtained by the method of field monitoring and numerical analysis can provide a theoretical basis for the design and construction of the left bank slope of daguan.At the same time,it also provides reference for similar engineering case analysis.