Study On Stability Analysis And Supporting Measures Of Mazhao Expressway High Slope

Most of the southwestern regions of China are mountainous and hilly,with mountains and mountains,and complicated geological and environmental conditions.Due to various factors such as geology,topography,climate,and so on,highway high slopes are often in an unstable state during construction,and unstable slopes need to be supported during road construction.Based on the previous research results,this paper comprehensively analyzes the geological data of the high slope of the Mazhao Expressway based on the high slope of the Mazhao Expressway.Through the geological survey report,on-site investigation,on-site and indoor test The engineering geological conditions of the slope are given,and the mechanical calculation parameters of the rock and soil are given.The numerical model of the stability of the high slope is combined with the finite element method and the mechanical principle.According to the numerical simulation results,the high slope support treatment measures are proposed.The main contents of this paper are:(1)Explain the basic principle of the basic finite element method of theoretical calculation used in this paper,and focus on the classical Mohr-Coulomb model of the soil constitutive model widely used in engineering.The main functions of the numerical analysis software Geo Studio based on the finite element method are further introduced,which lays a foundation for the numerical calculation and analysis of this paper.(2)Based on a detailed study of the topographical features,stratigraphic lithology,geological structure,hydrogeology and other geological conditions and factors of the high slope of the Mazhao Expressway,the slope is determined to be a binary slope of anti-dip earth and stone.The slope stability is mainly controlled by the thickness of the deposit,the thickness of the weathered layer,the height of the excavation slope,and the combined shape of the structural plane.The failure mode of the slope is mainly the sliding of the weathered layer along the joint surface,the collapse of the deposit,and the cutting of the structural plane.The body collapses,the slope is unstable,and support is required.(3)The finite element analysis software Geo Studio was used to establish a high slope point stability analysis model,and the safety factor,stress and strain state of the slope without reinforcement were analyzed.Qualitative and quantitative analysis of the nature,scale and hazard of the disease that may occur after excavation of high slope,and comprehensive lithological composition,weathering degree,rock and soil strength,main structural plane and slope free surface The spatial relationship,groundwater and other geological features are analyzed for preliminary stability,and the main controlling factors of slope stability are proposed.The failure form and failure strength of the slope are predicted.(4)Slope reinforcement is carried out for the slope failure mechanism.The slope reinforcement design is designed as a reinforcement scheme based on the anchor frame and the girders,and the vegetative belt is used for grass greening.