降水导洞及正线隧道下穿砌体建筑物的施工影响

Construction Influence of Dewatering Pilot and Running Tunnel Crossing Underneath Masonry Structure Building

以北京地铁8号线三期工程王府井北站-王府井站区间隧道近距离下穿懋隆黄金砌体结构建筑物为背景,通过对建筑物现状调查、检测和评估,确定了建筑物变形控制标准。以砌体结构房屋局部倾斜和最大沉降量为指标,分析了降水导洞和区间隧道施工对临近懋隆黄金的影响。研究结果表明:采用数值模拟方法,分析其在自重作用下发生的变形情况,作为建筑物建成后的累计变形,可以为建筑物变形控制指标的确定提供参考依据;降水导洞下穿砌体结构建筑物的施工过程中,采用的超前加固措施,可以有效减少施工对地表建筑物的影响,确保降水导洞和区间隧道施工过程中地表建筑物的结构安全。

Maolong gold masonry structure building was crossed underneath with a short-distance by the running tunnel between Wangfujing North Station and Wangfujing Station of Phase III of Beijing Metro Line 8.The deformation control criteria were determined by investigation,testing and evaluation of the building present situation.Local inclination and maximum settlement of masonry structure building were taken as indexes,the impact of dewatering pilot and running tunnel construction on adjacent Maolong gold building was analyzed.The results show that based on the numerical simulation method,the deformation resulted from self-weight of building was analyzed and taken as cumulative deformation after the construction,this could be the reference to determine deformation control index.During construction process of dewatering pilot crossing underneath masonry structure building,the pre-reinforcement measurement can effectively reduce the impact of construction.The structural safety of building can be ensured during construction of dewatering pilot and running tunnel.