武汉卓刀泉立交与地铁隧道施工的相互影响分析

Analysis of interaction between construction of subway tunnel and Zhuodaoquan Interchange

武汉地铁2号线广虎区间下穿正在施工的卓刀泉立交桥,为了避免两工程在建设中的相互干扰,对地铁隧道与立交施工的相互影响进行数值模拟分析。计算结果表明,隧道开挖对立交桥桩的影响不大,但需要采取针对性工程措施以保障两个工程的安全。提出在施工中加长靠近地铁一侧的桩身,加强桩周土体回填注浆,加强监测和进行桥墩结构复核等措施以提高桩周土体稳定性,并把隧道开挖的影响降到最低。完工后的监测数据显示,施工中采取的各项措施既有效保证了工程安全,又将相互影响降到最低。

The section of Wuhan NO. 2 subway line from Guangbutun to Huquan goes through Zhuodaoquan Interchange underground. The numerical simulation of interaction between the two projects was conducted in order to avoid the interaction of two projects. The results show that the influence of metro tunnel excavation on the interchange was little, and engineering measures should be taken accordingly during the construction to ensure the safety of the two projects, including lengthening the pile body near the metro, strengthening the backfill grouting of the soil body around the pile, strengthening the monitoring and checking on the structure of piers, so as to improve the stability of soil body around the pile body and reduce the influence of tunnel excavation to the smallest. The monitoring data after the construction showed that the measures ensured the safety of the projects effectively.