摘要
某地铁盾构开挖时,隧道工作面在推进过程中会产生上覆土体沉降,并对邻近建筑物产生拉伸变形和收缩变形,尤其是在富水软土地区情况更明显,基于MIDAS GTS软件建立三维盾构隧道开挖有限元模型,对盾构施工引起的地表沉降、土体塑性区、邻近建筑物影响及盾构管片受力情况进行数值模拟分析,并对比现场实测数据。结果表明,盾构施工造成的地表沉降可能破坏邻近建筑物,需要针对性地提出控制措施。
During the shield excavation of a subway,the soil settlement on the working face of the tunnel will bring tensile and shrinkage deformation of the adjacent buildings,especially in the water-rich soft soil area.To solve this problem,a three-dimensional finite element model of shield tunnel excavation is established based on MIDAS GTS software.Then the surface settlement,soil plastic zone,the influence of adjacent buildings and the force of shield segment caused by shield construction are numerically simulated and analyzed,and then compare the result with measured data on site.It is found that the ground settlement caused by shield construction may destroy adjacent buildings,so targeted control measures are needed.
作者
刘德斌
LIU Debin(BCEG No.4 Construction Engineering Co.,Ltd.,Beijing 100075,China)
出处
《施工技术（中英文）》
CAS
2022年第11期127-130,共4页
Construction Technology
关键词
隧道
盾构
开挖
有限元分析
地表沉降
tunnels
shields
excavation
finite element analysis
ground settlement
