Study On Temperature Field And Stability Of The Seasonal Coarse Grained Frozen Soil Slope In The Sichuan Tibet Railway

At present,for the construction of the Sichuan-Tibet railway,due to geographical conditions of Tibet area restrictions,in the process of building the inevitable need to Xinduqiao through vast areas as the representative of the high altitude cold water on slope foot,this slope remains to be further developed.Based on the background of alpine region of Sichuan-Tibet Railway in seasonal frozen soil engineering properties and slope stability research,numerical simulation and field monitoring from the perspective of Xinduqiao area seasonal coarse permafrost slope of the temperature field and the stability of a series of studies.In the seasonal frozen soil area,the temperature field on the slope stability plays a decisive effect,to establish the finite element model of coarse grained soil slope in seasonal temperature,according to the engineering properties of coarse grained soil areas Xinduqiao method,empirical formula and field measurement are discussed and analyzed the temperature field related parameters of finite element model and the boundary conditions,so as to establish the analysis model of temperature field,and comparing with the field measured results of the analysis of rationality,verify the correctness of the model and related parameters.On the basis of research on temperature distribution of coarse particles of seasonal permafrost slope,the slope obtained maximum thawing depth,freeze-thaw interface changes,different positions of the temperature field and temperature difference of groundwater on slope effect,at the same time,summed up the slope calculation formula of temperature field obtained Xinduqiao area.Based on the study of temperature field,establish the analysis model of seasonal frozen soil slope stability and coarse particles,through the simulation analysis of field conditions,comparing the failure characteristics of seasonal freezing and thawing permafrost slope of coarse particles.In addition,the study also analysis on the slope material composition,slope height,slope ratio and the influence factors of slope stability,puts forward some suggestions and opinions related to the design of slope.Based on the previous scholars on the research,further analysis of the temperature field distribution and the slope stability of the seasonal frozen soil slope of coarse particles,which can provide a reference for prevention and treatment of slope in the process of construction of the Sichuan-Tibet railway.