城市轨道交通盾构隧道下穿人行通道施工影响规律分析

Analysis on construction influences of the urban rail transit shield tunnel crossing the pedestrian passage

城市轨道交通建设快速发展,往往对既有的城市市政设施带来了不同程度的影响,针对城市轨道交通盾构隧道下穿人行通道影响进行研究。基于盾构隧道下穿既有的人行通道案例,结合盾构机施工情况、监测数据、检测数据、数值模拟结果,研究盾构隧道穿越过程中人行通道的施工影响规律。研究结果表明:人行通道受盾构隧道下穿的影响规律主要分为三个阶段,即前期沉降、中期隆起、后期沉降,其中前期沉降变形相对较小,中期隆起和后期沉降变形较大,对人行通道结构变形影响显著,施工过程应重点关注这两阶段的施工影响。

With the rapid development of urban rail transit construction,the existing urban municipal facilities are often affected.In this paper,construction influences of the urban rail transit shield tunnel crossing the pedestrian passage are disscused.Based on the case of shield tunnel passing through the existing pedestrian passage,this paper studies on the construction impact law of pedestrian passage in the process of shield tunnel crossing,combined with the construction situation of shield tunnel,monitoring data,detection data and numerical simulation results.The deformation law of the pedestrian passage under the shield tunnel is mainly divided into three stages:the early settlement,the middle uplift and the later settlement.The early settlement deformation is very small,the middle uplift and the later settlement deformation are large,which has a significant impact on the structural deformation of the pedestrian passage.The construction impact of these two stages should be focused on during the construction process.