Analysis Of High And Steep Slope Stability And Beidou Signal Monitoring Under Heavy Rainfall

With the rapid development of highway construction in China,problems related to high and steep slopes are often encountered in the construction of related projects in the southern mountainous and hilly areas.In complex engineering practice,slope stability is easily affected by rainfall,seepage and other factors.Therefore,it is of great engineering significance to study the slope stability under heavy rainfall and to build a real-time and remote slope deformation monitoring system.Based on a slope project in Jiangxi Province,this paper mainly focuses on the structural deformation and stability of high and steep slope under heavy rainfall.Through ABAQUS software,the results of pore pressure distribution and vertical settlement can be used as reference and basis for engineering construction.Firstly,the large-scale finite element software ABAQUS is used to simulate the deformation and stability analysis of Expressway Slope under heavy rainfall.The soil pore pressure and vertical settlement can be used as the main deformation indexes.Secondly,based on the numerical results of pore water pressure calculation and Mohr Coulomb constitutive model,the stability analysis is carried out in the visualization post-processing module.According to the color map,the potential position of the arc-shaped sliding surface inside the slope is determined,and the distribution of pore water pressure with the slope height is obtained by software simulation.The slope stability is analyzed by changing the slope of the model.Finally,the theoretical research results are applied to specific engineering projects,and Beidou all-weather barrier free communication technology is adopted to realize the real-time and remote monitoring of slope stress and displacement by monitoring terminal.Based on the background and data of the project,the rainfall intensity and rainfall duration are considered as the main influencing factors.Finally,with reference to the numerical simulation results of the software,the reference and basis are provided for similar projects,the results are as follows:1)Under the action of heavy rainfall,the higher the slope height,the larger the sliding displacement and extrusion displacement of soil in the horizontal direction.The increase of slope height makes the gravity center of the slope move up.Practical engineering experience tells us that the higher the gravity center of the structure,the easier it is to lose stability.Once it is unstable,the greater the displacement in the horizontal direction.2)Under the action of heavy rainfall,the higher the slope height is,the more obvious the settlement of soil in the vertical direction is.The main reason for this phenomenon is that the increase of slope height increases the self weight of the slope.Under the effect of the self weight of the slope,the heavier the soil is,the greater the settlement is.With the increase of slope height,the maximum settlement area gradually transits from the inside of the slope to the surface of the slope.