论文部分内容阅读
软土地区盾构近距离穿越已建隧道的工程近年来不断增加,尤其是运营中的地铁隧道其结构安全保护要求很高。在地铁不停运过程中,相邻穿越施工中稍有不慎都可能引发巨大的安全事故。穿越施工对地层及相邻隧道结构扰动的因素众多,机理复杂。本文归纳了国内目前类似施工的控制指标,对该类工程的研究现状、变形机理及影响因素进行了探讨。
In recent years, the project of shield tunneling across soft-shelved tunnels in soft soil areas has been increasing continuously. In particular, subway tunnels under operation have high requirements on structural safety protection. During the non-stop operation of the MTRC, a slight accidental crossing of the adjacent construction may cause a huge safety accident. There are many factors that disturb the structure of the strata and the adjacent tunnels through construction, and the mechanism is complex. This paper summarizes the current domestic similar construction control indicators, the status quo of such projects, deformation mechanism and influencing factors are discussed.