摘要
利用FLAC3D商业有限差分数值模拟软件,对北京站—北京西站地下直径线开挖可能引起的地表沉降进行研究。根据地质勘探资料,选取洞桩法施工段的典型断面,建立计算模型,计算条件考虑已有地铁荷载对该段开挖的影响,按照施工组织情况,设计相应的计算工况。根据计算结果,对既有环线地铁荷载影响下的隧道施工引起的地表变形进行分析,研究隧道、既有地铁、地表沉降变形三者之间的关系和变化规律,同时也验证直径线工法的可行性,为其后续施工及具体工法改进提供了数据支持和参考。
Using commercial finite difference numerical simulation software FLAC^3D, the ground settlement induced by underground excavation of subway diameter line between Beijing Station and Beijing West Station is studied. According to the geological exploration data, a typical section of pile-in-hole method is selected to build computing model. And the effect of existing subway load and specific construction management are considered in the calculating conditions. Moreover, computing schemes and steps are designed based on these. According to the calculating results, the ground settlement induced by the existing subway load and the underground excavation is analyzed, and the relations and variation rules among settlements of tunnel, existing subway and ground are studied at the same time. Simultaneously, feasibility of diameter line construction is validated, which provides data supporting and references to specific technology improvement for subsequent construction.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2009年第A01期3221-3225,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
隧道工程
地铁隧道
既有荷载
开挖
地表沉降
tunnelling engineering
subway tunnel
existing load
excavation
ground settlement
