既有地铁荷载对北京地下直径线开挖地表沉降影响  

INFLUENCE OF EXISTING SUBWAY LOAD ON GROUND SETTLEMENT INDUCED BY UNDERGROUND EXCAVATION OF BEIJING SUBWAY DIAMETER LINE

作　　者：黄昌富[1,2] 高永涛 

机构地区：[1]京科技大学土木与环境学院,北京100083 [2]中铁十六局集团有限公司,北京100018

出　　处：《岩石力学与工程学报》2009年第A01期3221-3225,共5页Chinese Journal of Rock Mechanics and Engineering

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.

关 键 词：隧道工程 地铁隧道 既有荷载 开挖 地表沉降 

分 类 号：U45[建筑科学—桥梁与隧道工程]