地铁车站中洞法施工地表沉降变形规律研究  

On Surface Settlement during Subway Station Construction Using the Center Drift Excavation Method

作　　者：李文聪[1] LI Wencong(Beijing Urban Construction Exploration ＆ Surveying Design Research Institute Co. Ltd., Beijing 100101)

机构地区：[1]北京城建勘测设计研究院有限责任公司,北京100101

出　　处：《现代隧道技术》2018年第2期189-193,共5页Modern Tunnelling Technology

摘　　要：文章以北京地铁14号线陶然桥站中部暗挖主体工程为研究对象,通过几何水准测量监测方法,对中洞法施工各施工工序引起的地表沉降变形规律进行了分析和总结。结果表明,沉降变形主要经历5个阶段,即柱洞初期支护施工沉降阶段、中洞初期支护施工沉降阶段、中洞二次衬砌底板与扣拱施工沉降阶段、侧洞初期支护施工沉降阶段及二次衬砌结构施工沉降阶段。其中第Ⅰ阶段与第Ⅳ阶段沉降值占最终沉降值比重最大,最终沉降横断面曲线呈轴对称,以中洞中线为对称轴线。Based on the mined construction of Taoranqiao station of Beijing metro line 14, the law of surface settlement induced by construction procedures of the center drift excavation method is analyzed and the experience is summarized by means of geometrical leveling. The results show the settlement mainly undergoes five stages, i.e., 1） settlement stage Ⅰ in primary support construction of the pillar pilot tunnel, 2） settlement stage Ⅱ in secondary lining construction of the central pilot tunnel, 3） settlement stage Ⅲ in construction of the floor and buckling arch of the central pilot tunnel, 4） settlement stage IV in construction of the primary support at the side pilot tunnel, and 5） settlement stage V in secondary lining construction. The settlements of phase Ⅰ and phase Ⅳ account for the largest proportion of the final settlement; the curve of final settlement is axisymmetric, with the central line of the central pilot tunnel to be the axis of asymmetry.

关 键 词：中洞法 沉降监测 变形规律 地铁车站 

分 类 号：U231.4[交通运输工程—道路与铁道工程]