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首页> 外文期刊>Bulletin of engineering geology and the environment >Numerical analysis of steady-state groundwater inflow into Tabriz line 2 metro tunnel, northwestern Iran, with special consideration of model dimensions
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Numerical analysis of steady-state groundwater inflow into Tabriz line 2 metro tunnel, northwestern Iran, with special consideration of model dimensions

机译：伊朗西北部大不里士2号线地铁隧道稳态地下水入流的数值分析，并特别考虑了模型尺寸

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摘要

In order to prevent problems like casualties, delays in tunneling procedure, and increasing tunneling costs, predicting groundwater inflow into tunnels and designing an efficient drainage system are necessary. Several analytical solutions exist in the literature, but they cannot accurately estimate groundwater inflow due to simplifying assumptions. Numerical methods, however, are increasingly used to predict groundwater inflow with higher accuracy. This study is aimed at predicting the steady state groundwater ingress into Tabriz line 2 metro tunnel (TML2: a shallow urban tunnel) by considering model dimensions as critical factors in the numerical analysis process. A 2-D numerical finite element analysis of steady state groundwater inflow was performed along the tunnel based on geological and geotechnical investigations. Water inflow into TML2 was then estimated based on optimum model dimensions. The total amount of groundwater inflow into TML2 was estimated to be 7013.6 l/min. The maximum cumulative water inflow into the tunnel was also predicted to occur between 15.55 and 16.25 km in the tunnel with a 4754 l/min inflow rate, which demands an effective drainage program. Finally, for validation of the methodology groundwater inflow values obtained through 2D finite element analysis were compared to those calculated with a well-known inflow evaluation method (Raymer solution).
机译：为了防止人员伤亡，隧道施工过程中的延误和增加隧道成本等问题，预测地下水流入隧道和设计有效的排水系统是必要的。文献中存在几种分析解决方案，但由于简化了假设，因此无法准确估算地下水流入量。但是，越来越多地使用数值方法来预测地下水流入的准确性。这项研究旨在通过将模型尺寸作为数值分析过程中的关键因素，预测大不里士2号线地铁隧道（TML2：城市浅埋隧道）的稳态地下水进入量。基于地质和岩土调查，对沿隧道稳态地下水入流进行了二维数值有限元分析。然后根据最佳模型尺寸估算流入TML2的水量。流入TML2的地下水总量估计为7013.6 l / min。隧道中的最大累计水流入量预计在15.55至16.25 km之间，入水流量为4754 l / min，这需要有效的排水程序。最后，为了验证方法学，将通过2D有限元分析获得的地下水入流值与通过众所周知的入流评估方法（Raymer解决方案）计算出的地下水入流值进行比较。

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