PBA法扩挖大直径盾构隧道修建地铁车站地表沉降控制  

Control standard for ground surface settlement in enlarging shield tunnel by PBA method to build metro station

作　　者：王芳[1] 贺少辉[1] 汪挺 刘军[3] 曹瑞琅[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京市政建设集团有限责任公司,北京100045 [3]北京建筑工程学院土木与交通工程学院,北京100044

出　　处：《北京交通大学学报》2013年第1期34-39,共6页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：北京城建设计研究总院有限责任公司技术创新资助项目(2010-07)

摘　　要：北京地铁14号线试验段采用土压平衡盾构修建,并结合PBA(Pile-Beam-Arch)法小规模暗挖拓展区间隧道形成地铁车站.这种工法可以有效地解决地铁车站和盾构隧道施工之间的矛盾,但没有经验可以借鉴.综合运用预测地表沉降的经验公式、相关统计资料和规范及数值模拟方法,对PBA法扩挖大直径盾构隧道修建地铁车站的过程进行地表沉降分析.结合北京地铁车站地表沉降控制基准值和现有地铁车站地表沉降统计数据,提出地表沉降控制标准,并按照三级控制的管理方法,分级分步进行地表沉降控制,研究结果对工程施工有一定的参考价值.The experiment section of Beijing metro line 14 is constructed by earth pressure balance shield machine,and the shield tunnel will be enlarged by Pile-Beam-Arch method（PBA method） to form the metro station.This method can effectively and safely solve the contradiction between the construction of metro station and shield tunnel,but there is not similar engineer.The empirical formulas of predicting the ground surface settlement,the related statistics data and specifications,and numerical simulation methods are used to predict the ground surface settlement caused by the large diameter shield tunnel enlarged by PBA method in construction process.Combined with the ground surface settlement control reference values of Beijing metro station and the statistic data of existing metro station statistics,the ground settlement control standard is put forward.In accordance with the three class control management methods,the ground surface settlement is controlled step by step.The research results have some reference value to guide the engineering construction.

关 键 词：大直径盾构隧道 PBA法扩挖 地铁车站 地表沉降 控制标准 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]