地铁隧道下穿既有建筑物锚杆基础影响分析

Analysis on Influence Caused by Subway Tunnel Undercrossing Anchor Foundation of Existing Building

地铁隧道下穿大量建筑物,评估隧道施工引起的影响是控制工程风险的关键课题。结合厦门市轨道交通1号线一期工程,中山路西站—中山路站区间隧道下穿既有建筑物抗浮锚杆基础,采用三维数值模拟的研究方法,分析区间隧道开挖对既有建筑物抗浮锚杆的影响,对工程可实施性进行研究,提出相应工程辅助措施。实践结果表明:区间隧道开挖引起的变形满足控制要求。

Subway tunnel passes beneath a large number of buildings. Assessment of influence caused by such tunnel construction is a key subject in relation to control of engineering risk. As regards the subway tunnel, which locates between West Zhongsban Road-Zhongshan Road Station of Rail Transit Line 1 in Xiamen, under-crossing the anti-floating anchor foundation of the existing building, how the excavation thereof affects the anti-floating anchor is studied by use of 3 D numerical simulation, analyzing the engineering feasibility and proposing corresponded auxiliary measures. The practical result shows that the deformation caused by excavation of the interval tunnel meets the control requirement, and can be referred to by design and construction of interval structure.