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随着轨道交通和城市建设的迅速发展,紧邻运营线路的基坑(包括隧道两侧及上部)项目屡见不鲜,许多大型深基坑距离地铁仅有3m,开挖深度>20m。深基坑开挖必然引起围护结构向基坑内的侧向位移和坑内土体隆起,加之工程降水等因素影响使得坑外地层沉降,隧道结构随之变形。施工过程中的不慎、不当很可能导致地铁结构的变形超标,从而引发
With the rapid development of rail transit and urban construction, there are many projects of foundation pit (including both sides and upper part of the tunnel) immediately adjacent to the operation route. Many large deep foundation pit are only 3m away from the subway and the excavation depth is> 20m. Excavation of deep foundation pit inevitably leads to the lateral displacement of the retaining structure to the foundation pit and the soil uplift in the pit. Combined with the influence of engineering precipitation and other factors, the settlement of the outer layer of the pit causes the deformation of the tunnel structure. Inadvertent and improper construction process may lead to excessive deformation of the subway structure, thus triggering