Research And Risk Assessment Of Highway Abandon Stability

For a long time,many highway construction projects in China,especially the construction of mountainous highway,and most of the highway construction process,the highway soil field also arises;Because there is no systematic soil field risk assessment program,there is little research on the safety distance of highway waste cube,the design and location of the dump site is arbitrary,resulting in an endless disaster of soil field landslide,great loss and potential threat to people's life and property.After the event landslide in Shenzhen,it is more attention,it is urgent to solve the soil field safety problem.In this paper,three-dimensional discrete element method is used to study some key mechanical characteristics of earth-rock mixture,to provide theoretical parameters for the study of the stability of dump.Taking the soil field landslide of Guizhou river highway as the research object,using the discrete element method to simulate the unstable sliding process of the clay court field;On this basis,by changing some important parameters affecting the sliding distance,the relationship between the range of soil field landslide and these parameters is obtained,which provides a reference for the evaluation of the risk of soil field landslide.The risk assessment of other forms of abandon landslide also has reference,the main results are as follows:1.because the highway waste cube is earth-rock mixture,according to the different stone content,this paper uses the discrete element method to simulate the indoor large shear experiment,and obtains the relationship between the mechanical characteristics parameters(internal friction angle,cohesion)and stone content,which provides important theoretical mechanical parameters for the study of the general highway.And to abandon other forms of qifangti also has a certain reference.2.this paper uses the discrete element method,using the particle discrete element method to simulate the process of landslide in the clay court,basically restore the process of soil field landslide,determine the parameters of soil field landslide,and provide theoretical basis for the feasibility of follow-up study.3.by changing the mechanical parameters of the soil field,physical conditions,etc.,the relationship between the sliding distance of soil field landslide and the friction coefficient,qifangliang and groove slope of the abandon is obtained.For the prediction and evaluation of the influence range of soil field landslide plays a certain reference role,for the soil field site selection from many aspects.