基坑支护结构变形对邻近地铁隧道的影响研究  

Study on Influence of Foundation Pit Supporting Structure Deformation on Adjacent Metro Tunnel

作　　者：温忠义[1] 张丽娟[1] 陈松[2] 张雅宁[3] 

机构地区：[1]广东工业大学土木与交通工程学院,广州510006 [2]江西省交通职业技术学院,南昌330013 [3]广东省建筑科学研究院,广州510500

出　　处：《路基工程》2014年第5期144-148,共5页Subgrade Engineering

摘　　要：对广州某深基坑开挖支护结构变形对邻近地铁隧道的影响进行了有限元模拟,并将模拟结果和实测结果进行了对比分析。结果表明:基坑支护结构的侧向位移,不仅对邻近地铁隧道产生侧向位移,也产生一定的竖向位移,而位移增量以竖向变形为主。运营地铁隧道的变形增量,随着新建基坑支护结构的变形增大而增大,隧道顶部的位移变化量比底部处的大,靠近基坑支护结构一侧的变形比远离基坑支护结构一侧的大。建议采取有效措施来控制深基坑支护结构的侧向变形,以防止引起既有地铁隧道竖向变形过大,确保地铁运营的安全。How the supporting structure deformation in excavation of a deep foundation pit in Guangzhou affects the adjacent metro tunnel was simulated by FEM,and then the simulated and measured results were compared and analyzed.The result shows that the lateral displacement of the supporting structure for the foundation pit causes not only lateral displacement against the adjacent metro tunnel,but also certain vertical displacement,and the displacement increment is mainly contributed by the vertical deformation.The deformation increment of metro tunnel in operation increases with the supporting structure deformation of the foundation pit newly constructed,wherein the displacement variation on the tunnel top is greater than that on the bottom,and the deformation of the side close to the supporting structure is greater than that of another side far away from the supporting structure.It is suggested that effective measures should be taken to control the lateral deformation of the supporting structure so as to prevent from too large vertical deformation of the existing metro tunnel and ensure the absolute safety of the metro operation.

关 键 词：基坑工程 支护结构变形 地铁隧道 数值模拟 

分 类 号：U417.1[交通运输工程—道路与铁道工程]