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以武汉地铁2号线洪山广场—中南路区间,双洞隧道近距离穿越高层建筑物群为例,采用Plaxis 3D有限元计算软件,模拟地铁双洞隧道矿山法开挖过程。分析隧道穿越建筑物前、侧穿过程以及离开后3个阶段建筑物的沉降、土层应力变化规律。并将不同施工方案引起的邻近高层建筑物结构沉降、应力重分布、塑性区分布以及倾斜情况进行对比分析。模拟结果表明,受隧道与建筑物的交互影响作用,先施工远离建筑物的隧洞施工的方案对邻近建筑影响最小,以此对隧道穿越高层建筑物的施工方案进行优化。
Take the Hongshang Square - Zhongnan Road section of Wuhan Metro Line 2 and double tunnels through high - rise buildings at short distance as an example, the Plaxis 3D finite element software is used to simulate the mining method of double tunnel tunnel. Analysis of the tunnel before crossing the building, side through the process and leave the building after three stages of settlement, soil stress changes. The structure settlement, stress redistribution, distribution of plastic zone and inclination of adjacent high-rise buildings caused by different construction schemes were compared and analyzed. The simulation results show that, due to the interaction between tunnels and buildings, the construction scheme of the first tunnel away from the building has the least impact on the adjacent buildings, so as to optimize the construction scheme of tunnels crossing high-rise buildings.