Force Mining Method In Combination With The Construction Of Metro Shield Tunnel Segments And Distortion

In recent years, the economy and the rapid development of China’s modernization, the pace of development of urban rail transit has been quickened, and the importance of urban rail transit in many cities are under construction, and in urban planning and construction. With the construction of urban rail transit construction pace continues to accelerate tunnel, address conditions faced by construction more complex, so the construction of two construction workers often need to use a combination method, in order to better solve encountered in construction difficulties, for example, the amount of shield can solve difficult driving hard rocks, while the risk for soft rock section of construction is greatly reduced. Removing the shield machine, hanging out and re-origination work need not be provided in hard rocks, which greatly reduces the limitations of the construction site, which greatly facilitates the construction organization. But the combination of the two labor law will also be some problems, such as insufficient segment longitudinal compressive force, water leakage, dislocation segments; segment will produce float after backfilling, lower shield machine attitude control during the performance and other issues.To solve the shield by construction problems caused by mining method, this paper from the Wuhan Metro Line wangjiawan range segment were related to the background by ANSYS finite element calculation software, on the tube sheet Shield empty push mine after the formation of the tunnel simulation analysis, variation analysis tube sheet and tube sheet longitudinal vertical stress of the forces. And combined with theoretical calculations, the use of mathematical and mechanical knowledge to analyze and dislocation segment floating rule.By theoretical calculation and finite element software simulation analysis, the tube sheet shield tunnel through a longitudinal stress and variation according to the distance of the mine shield tail, while the vertical force drawn tube sheet and tube and float relations According to the relationship between the distance pieces floating shield tail and dislocation. The result of the comparison with the theoretical results obtained by finite element software, mutual authentication to improve the reliability of the results. The conclusion of this article has certain guiding significance for the shield tunneling through the Mine Act.