Study On Stability Analysis And Evaluation Of Pingqiaogou Spoil Disposal Yard On Wenma Express Way

"To get rich,build roads first" has been ingrained in our minds.Especially in recent years,in order to develop the economy,highways are built on a large scale everywhere,and highways account for a large proportion in the construction of infrastructure.In the process of highway construction,the excavation along the highway will produce a large number of abandoned squares.The abandoned squares piled up randomly together with the special geographical environment in some areas will cause geological disasters such as landslide and collapse once handled improperly.It causes hidden danger to the safe operation of mountain expressway and the safety of surrounding environment and personnel.Based on this,this paper combined with Pingqiaogou slag dumping site example,carried out some research on the stability of the slope of Pingqiaogou slag dumping site,the main research contents of this paper are as follows :(1)Through the investigation site related geological survey work and combined with the existing investigation data,identify the surrounding environment and related geological conditions;Combined with the environmental and geological conditions of the field,the failure types and causes of the slope in the slag dump are comprehensively analyzed.(2)Firstly,the safety factors of the slag dam under natural and seismic conditions are obtained by numerical calculation using the rationing software recommended by the code,and the safety factors are compared with those under guaranteed safety conditions.Based on this,the stability of the slag dam is analyzed.(3)Secondly,combined with FLAC3 D numerical simulation software,the empty element model and Mohr-Coulomb model were used to analyze and evaluate the overall stability of the slag dam after slag surpiling in the slag zone and downstream.Stability analysis is mainly based on the results of numerical simulation under different working conditions and then the distribution of the plastic zone,the distribution of the first stress and the third stress,as well as the displacement isolineand displacement vector distribution of these characterization parameters are analyzed.At the same time,the strength reduction method is used to calculate the stability coefficient of slag field and the prescribed safety coefficient to ensure the accuracy.(4)Finally,using Geo Studio software,according to the collected rainfall data,the SEEP module was firstly used to calculate and analyze the slope seepage field under different working conditions in the field area;Finally,the seepage result is coupled with SLOPE module to obtain the safety factor of slope under different working conditions.