地铁盾构隧道下穿覆土中雨污管线穿越角度影响分析

With the rapid development of urban rail transit network，a large number of subway shield tunnel near or even close to the municipal pipeline construction. The shield tunneling excavation causing the unloading of neighborhood soil, inevitable role in the municipal pipeline. In this paper, the numerical simulation method has been applied, a detailed analysis on the disaster mechanism of large diameter pipelines effect by the shield tunnel with multi-angle construction, relying on the Beijing Metro Line 7 through rain water and sewage pipeline project. The calculation results show that regardless the pipe section or the pipeline tongue-and-groove located in directly above of the shield tunnel, the maximum radial stress and axial stress appears on the intersection of the shield tunnel and pipeline. Crossing the shield tunnel with small angle, the amount of change in stress and corner would be small，and less impact on the pipeline. The results of this paper has certain reference significance for the design and construction of the relevant engineering.