The Stability Analysis Of The Rainfall Slope Of Tunnel Slag Dump Based On Geo-studio

In order to study the effect of rainfall infiltration on tunnel abandon slag field,improving the safety of sediment disposal slope,this article through the theoretical analysis and field investigation,indoor and outdoor test and numerical simulation analysis method combined with the research methods,the general situation of slope engineering of a railway tunnel spoil dump in rainy area of central south China is found out,physical and mechanical parameters of get thrown away.consequently body,check the drainage capacity of abandon slag drainage system,and using GeoStudio numerical simulation and limit equilibrium method to establish the tunnel slope rainfall infiltration abandon slag field numerical model,the result was the abandon slag field slope stability quantitative results in heavy rain conditions.The experimental results show that the slag body is gravel soil and the physical and mechanical parameters of the soil are determined.The main content of this paper are as follows: first of all,through the classification of abandon slag field slope and the influencing factors to conduct a comprehensive study,based on the general slope stability influence factors induce tunnel abandon slag field are the main factors causing the landslide deformation,and combining the seepage calculation principle and the theory of stability analysis,determine the using Geo-studio tunnel abandon slag field with numerical simulation software process of rainfall infiltration and slope stability calculation.The engineering geological and hydrological and meteorological conditions of the tunnel spoil site were analyzed through the field investigation and investigation of the project.The results of qualitative analysis and quantitative test show that the slag body is in good condition,the drainage measures are perfect,and the slope of the slag field is stable.Based on the calculation and analysis of the rainfall conditions and sink displacement of the tunnel dump site,it is concluded that the top drain of the tunnel dump site can basically meet its drainage needs,but the redundant drainage capacity is insufficient.In this paper,the comprehensive evaluation of the drainage scheme of the tunnel dump site is also given,and the corresponding solutions are proposed.At the end of the paper through the Geo-SLOPE/W module of studio software and SEEP/W module,to abandon slag field in the tunnel seepage and SLOPE stability when heavy rainfall condition simulated calculation,first of all,grade of SLOPE and calculation conditions are studied to determine,through the analysis of seepage field simulation two calculated under the condition of 3 h rainstorm and 0 ~ 96 h seepage variation law in the process of rainfall infiltration,finally through software comes with four kinds of limit equilibrium method to calculate the SLOPE stability of the abandon slag field,the results show that whether the whole or partial,The safety coefficient under normal and rainfall conditions is higher than the allowable safety coefficient required by the specification,and the stability of the tunnel waste residue field is better during 3h heavy rain and subsequent infiltration.