摘要
目前洞桩法是浅埋暗挖地铁车站的主要施工方法,但是由于洞桩法设置的导洞多、导洞间距小,所以导洞的开挖一直是设计者和施工者探索的重要课题。以北京地铁7号线双井站八导洞开挖为工程背景,利用有限元软件Ansys建立模型,并结合现场实际监测数据对两种方案进行对比分析,得到了两种不同导洞施工方案的地表沉降变化规律,对类似工程的施工具有参考价值。
Current PBA method is the main construction meth- od of subway station. Due to redandent pilot tunnels and small pilot tunnel spacing in PBA method, the pilot tunnel excavation has been the main issue for designers and constructors. Based on the excavation engineering of eight pilot tunnelsat Shuangjing Station on Beijing metro Line 7, the finite element software Ansys is used to establish a model, which is compared with the actual monitoring data of the site, then the surface subsidence changes of two different pilot tunnel construction plans are an- alyzed, some references are put forward for similar projects.
出处
《城市轨道交通研究》
北大核心
2014年第11期103-106,112,共5页
Urban Mass Transit
关键词
洞桩法
有限元
地表沉降
pile-beam-arch （PBA）
finite element
surfacesubsidence
