Research On The Influence Scope And Main Parameters Of The New Underground Works Through The Elevated Urban Rail Transit Line

As elevated urban rail transit line is a component of urban traffic,the safety of its operations is extremely important. Therefore,analyzing the influence scope and its main parameters of the new underground works through the elevated urban rail transit line, and making more rational division,is essential to provide reasonable recommendations for the design and construction of such projects, and to ensure the smooth lines and maintain the safety of train operation.The research method is mainly numerical simulation, and the major tasks of this paper are as following:1. Based on the widespread collection of the technical information of the influence scope of the new underground works through the elevated urban rail transit line, the status of related research was summarized.2. The water tunnel project across the Qinghe elevated bridge of Beijing Metro Line 13 was introduced firstly. Then the three-dimensional finite element model of the project was set up with the finite element software, and the numerical simulation was conducted. Finally, the results were compared with the monitoring data to verify whether the model is reasonable.3. The related factors in the influences to the deformation of the existing structure is analyzed, such as the vertical distance between the lower edge of the new underground works and the ground, the horizontal distance between the new underground works and piling, the width of the new underground structure, a comprehensive internal friction angle of soil. With orthogonal tests, the significance of factors was evaluated.4. According to the relevant codes,by analysing multiple sets of simulation data, the influence scope of the new underground works through the elevated urban rail transit line were more reasonably divided.