北京地铁5号线下穿既有区间结构的安全评估

Security Evaluation for Beijing Metro Line No.5 to Under-traverse Line No.2

建设北京地铁5号线崇文门站需下穿既有地铁2号线崇文门-北京站区间隧道,为保证既有地下铁道正常运营和地下结构的安全,需严格控制车站施工所引起的地层位移。根据崇文门站的暗挖施工的监测资料和既有区间结构的实际情况,计算和分析下穿情况下2号线区间结构的受力安全状态。

To construct Chongwenmen Station of Beijing metro line No. 5, it should under - traverse the existing transit tunnel between Beijing Station and Chongwenmen Station of metro line No. 2. To maintain the normal operation of line No. 2 and the security of the existing tunnel structure, it is necessary to strictly control the displacements of the ground caused by the construction of Chongwenmen Station. The security of the existing tunnel structure is calculated and analyzed in this paper according to the monitoring data of the station during construction and the conditions of the existing transit tunnel structure.