The Deformation Influence Of Connection Tunnel Construction On The Subway Station Structure And Construction Optimization Analysis

With the rapid development of our city in the process of city, rapid population expansion, traffic congestion problem in large city is getting more and more obvious, and city rail traffic as a safe, efficient, environmentally friendly large transportation system will be rapid development. At the same time, causing nearly project existing subway structure deformation, stress concentration on the subway operation safety has caused more and more serious impact. Therefore, to study and analyze the project nearly around city track traffic, it has important practical significance to find out the security impact on the city rail transportation structure. Therefore, this paper selects a typical case, a complete analysis of both the deformation of subway station structure connecting channels and sewage pipeline project construction process.According to the metro station design drawings and engineering geological data, establishes the structure of existing station,3D finite element model of connection channel structure and formation by use of ABAQUS finite element software. Nearly the construction process is divided into10conditions, to simulate the construction process of engineering construction and excavation, backfill soil. After the numerical simulation method using the statistical data, the deformation law of development both in horizontal, vertical, vertical on the station structure, sums up the situation of each structure deformation.Project monitoring data collected from the actual, the deformation of each monitoring point values were compared with the numerical simulation theory, draw the curve of each point in each direction cumulative maximum deformation, numerical simulation is verified the correctness of computation.Combined with the adjacent construction of both the mechanism of the effect of the station structure, puts forward change connection channel enclosure pile continuous wall, increase protection pile, in the entrance on the south side of the block excavation structure connecting channel excavation three optimization measures of construction. Calculated by numerical simulation method, comparison between the calculated value and the actual value before the monitor, verify the feasibility of the optimization measures.