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在地铁施工中受地形条件限制有时会遇到两条单线隧道近距离施工情况,有的间距超出了规范的要求。以深圳市轨道交通二期 1 号线续建工程为例,应用 ABAQUS 程序对实际情况进行了数值模拟分析,揭示了在开挖右线工程的时对左线既有隧道产生的影响,包括地表沉降、应力分布和衬砌变形及对地面建筑的影响,得出一些有益的结论,为今后近距离地铁施工提供可靠的依据。
In the metro construction by the terrain conditions sometimes encountered two single-track tunnels close construction conditions, some of the spacing is beyond the specification requirements. Taking the continued construction of Shenzhen Metro Line 1 as an example, the ABAQUS program is used to simulate the actual situation and reveal the influence on the left-hand existing tunnel when excavating the right-line project, including the surface Settlement, stress distribution and lining deformation and the impact on the ground construction, come to some useful conclusions, and provide a reliable basis for the construction of the near distance subway in the future.