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为研究渗流对重叠盾构隧道的影响,以杭州地铁1号线武-文区间工程为背景,采用FLAC3D软件的渗流模拟方法对交叉重叠盾构隧道的地表沉降、衬砌位移与内力等进行了分析,如何有效预测隧道施工引起的地表沉降或衬砌内力就显得尤为关键。采用数值模拟分析方法显然是一种行之有效的方法,但其前提是保证模型参数和分析方法必须尽可能与实际保持一致。然而现有隧道的数值分析结果却大多没有考虑地下水的渗流影响,导致数值模拟结果与实际存在较大误差。因此,文章基于杭州地铁1号线武文-区间工程,采用FLAC3D的渗流模拟分析方法,研究渗流作用下重叠盾构隧道的地表沉降、围岩塑性区、衬砌内力等,以为实际工程以及今后类似工程提供借鉴或参考。
In order to study the influence of seepage on overlapping shield tunnels, the seepage simulation method of FLAC3D software is used to analyze the surface settlement, lining displacement and internal force of the cross-overlapped shield tunnel with the background of Wu-Wen interval project of Hangzhou Metro Line 1. How to effectively predict the surface subsidence caused by tunnel construction or lining internal force is particularly crucial. The numerical simulation method is obviously an effective method, but the premise is to ensure that the model parameters and analytical methods must be consistent with the actual. However, the results of numerical analysis of existing tunnels mostly do not consider the seepage effects of groundwater, leading to large errors between the numerical simulation results and the actual ones. Therefore, based on the Wu-wen-interval project of Hangzhou Metro Line 1, the FLAC3D seepage simulation method is used to study the settlement, the plastic zone of surrounding rock and the lining internal force of the shield tunnel under the seepage action. Considering that the actual engineering and similar projects in the future Provide reference or reference.