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某地铁区间左侧暗挖隧道已施工完成,待施工右侧单线隧道距其仅5.45m,且长距离下穿住宅等建筑物。为确保临近隧道和建筑物安全,保证工程的正常进行,本文采用数值分析软件建立计算模型,对矿山法和盾构法施工方法下的临近构筑物的力学行为进行数值计算。对比两种施工方法下初支结构受力及振动速度、建筑物沉降及振动速度变化,结果表明采用矿山法施工极易造成既有构筑物破坏,采用盾构法施工则可将不利影响降至最低,该研究成果可为类似工程提供借鉴。
A tunnel on the left side of the metro area has been completed and is under construction until the single-lane tunnel on the right side of the subway line is only 5.45m away from it. In order to ensure the safety of adjacent tunnels and buildings and ensure the normal operation of the project, numerical calculation software was used to establish the calculation model to calculate the mechanical behaviors of adjacent structures under the mining and shield methods. Comparing the stress and vibration velocity, the settlement and the vibration velocity of the primary structure under the two construction methods, the results show that the construction of the mine method can easily destroy the existing structures and the shield construction can minimize the adverse effects , The research results can provide reference for similar projects.