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地铁工程是一项建设规模大、工期长、投资多、社会效益倍受关注的工程。沈阳地铁工程穿过的地层主要为砂性地层,沿线地上穿越多个商业繁华区,地下管线密集,安全要求高,施工引起的环境岩土工程问题是地铁建设风险的重要组成部分。本文立足于沈阳地铁一号线工程,结合明挖法、盾构法、施工降水等主要施工工法和手段,分析了砂性地层中与地铁施工相关的支护结构变形、位移,流沙、管涌,因土体变形和沉降引起的地面、管线和相邻建筑物的沉降和破坏,以及与施工降水相关的土体固结和地下水环境的变化等环境岩土工程问题。
Subway project is a large-scale construction, long duration, more investment, social benefits have drawn much attention to the project. The stratum through which the Shenyang Metro project passes is mainly sandy strata. The ground passes through several commercial downtown along the route with dense underground pipeline and high safety requirements. The environmental geotechnical problems caused by the construction are an important part of the subway construction risk. Based on the project of Shenyang Metro Line 1, combined with the main construction methods and methods such as excavation method, shield method and construction precipitation, the paper analyzes the deformation, displacement, quicksand, Environmental geotechnical problems such as the settlement and destruction of ground, pipelines and adjacent buildings caused by soil deformation and settlement, as well as the consolidation of soil and the change of groundwater environment related to construction precipitation.