Evaluation Of The Impact Of Mountain Road Construction On The Safety Of Existing Rail Transit Facilities

With the continuous improvement of the level of urbanization and rapid economic development in China,the number of urban population has increased year by year,and traffic has become more and more congested.Rail transit has played an active role in alleviating urban congestion.With the formation of urban rail transit network,the phenomenon that new municipal engineering will pass through underground structures will be more and more frequent.The construction of municipal road is bound to disturb the surrounding rock and soil,which results in the internal force and deformation of the rail traffic structure.In order to ensure the safety of rail transit,it is necessary to evaluate the safety of the rail section and its entrances and exits,so as to guide the design and construction of the new municipal roads.Based on the road engineering of the southern section of Zong-Er road in Chongqing,the safety effects of the new municipal road on the existing urban rail transit are studied by the finite element simulation analysis and the load-structure method.Through the plane and three-dimensional finite element simulation method,the paper calculates and analyzes the typical working conditions of the typical section of the Jialing River Bridge at the north end of the Jialing River,to the Cao Jia Wan Station,Cao Jia Wan Station,Cao Jia Hu station to the Cai Jia station;Through the load-structure method,two entrance and the piston air shaft of the caojiawan station was calculated by analysis.The conclusions are as follows: the influence of the new track on the existing rail transit facilities in the southern section of the Zong-Er road is in the safe range.Finally,the engineering analogy method is used to support the correctness and reliability of the project.In conclusion,through the study of this paper,it is found that the finite element numerical analysis and the load structure method are effective means in the study of the safety evaluation of the existing municipal road to the existing rail transit facilities.This method can be generalized and applied when similar safety impact assessment projects are encountered.