Study On Stability Of Multi-stage Reinforced Earth Retaining Wall Of Dechang Station On Newly Built Kunming Railway

Nowadays,reinforced earth retaining walls have been widely used in various civil engineering projects such as railways,highways and water conservancy.However,the reinforcement mechanism and theoretical research still lag behind the actual engineering.Therefore,in the field of civil engineering applications,soil filling is suppressed.The local deformation of the retaining wall,reducing the horizontal displacement of the retaining wall,and improving the overall stability of the reinforced soil retaining wall are still a very important and significant issue in geotechnical engineering.The soil retaining wall is taken as an example.The theoretical calculation of the reinforced soil retaining wall is performed.The stability of the reinforced soil retaining wall under different loads(self-weight,static train load,and railway cyclic load)is calculated using the three-dimensional numerical simulation software Flac3 D.The simulation is carried out,and the stability of the reinforced soil retaining wall under different seismic accelerations is analyzed and discussed.The following aspects are mainly studied:(1)Combined with the current research situation at home and abroad,the in-depth theoretical analysis of the reinforcement mechanism and the interaction between the reinforced earth retaining wall was carried out,and the concentrated failure forms of the reinforced earth retaining wall were classified and summarized.(2)Through theoretical analysis,the internal and external stability calculations were carried out under natural conditions and seismic conditions(0.2g,0.3g,0.4g,0.6g,0.8g,1.0g)of the reinforced earth retaining wall at Dechang West Station.The natural and earthquake conditions(at an earthquake acceleration of 0.2g and 0.3g)both have stability coefficients that meet the design requirements.As the earthquake acceleration continues to increase,the safety stability factor of the reinforced earth retaining wall continues to decrease.(3)Based on the construction site of the reinforced earth retaining wall at the newly built Dechangxi Station of the Kunming Railway,the influence of different loads on the stability of the reinforced earth retaining wall of the railway was studied,and the finite element software Flac3 D was used to reinforce the natural working conditions The simulation results of the retaining wall were sorted out and analyzed,and the vertical settlement of the retaining wall under different loads,the displacement of the wall surface and the strain of the rib strain were obtained,and the location of the potential fracture surface of the reinforced soil retaining wall.(4)Analyze and discuss the impact on the stability of railway reinforced earth retaining wall under earthquake conditions(0.2g,0.3g,0.4g,0.6g,0.8g,1.0g),and obtain the horizontal displacement and reinforcement of the wall The deformation law of strain and the changelaw of the fracture surface of reinforced earth retaining wall with the increase of seismic acceleration.