Groundwater-related aspects during the development of deep excavations below the water table: A short review
Groundwater-related aspects during the development of deep excavations below the water table: A short review
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DOI：
10.1016/j.undsp.2019.10.002
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发表时间：
2019-10
影响因子：
6.4
通讯作者：
E. Pujades;A. Jurado
中科院分区：
文献类型：
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作者：
E. Pujades;A. Jurado
城市地区的预期增长要求建设地下基础设施，特别是为了改善交通和流动性。这些新的基础设施通常建在地下水位以下，因为它们必须比以前的地下结构更深。此外，许多城市地区位于地表水体（即海洋、河流和/或湖泊）附近，导致地下水位较浅。在这种条件下，地下基础设施建设常用的施工方法是“挖盖”法和打水井法。该程序的主要关注点与开挖底部的稳定性，挡土墙的行为和/或脱水作用引起的影响有关。必须对这些问题进行评估，并提出新的解决方案以改进其弱点。本文对地下水位以下和城市地区地下基础设施采用挖盖与抽水相结合的方法进行建设的主要文献进行了整理。本文综述表明，尽管已发表的研究很多，但仍需要更多的研究来解决一些相关问题，如：(1)通过人工补给来减轻降水影响，(2)适应非均质条件下使用的挡土墙特征方法，(3)改进抽水产生的地表沉降预测，以及(4)在降水系统设计中考虑非达西流。
The expected growth of urban areas requires the construction of underground infrastructures, especially for improving transportation and mobility. These new infrastructures are commonly constructed below the water table because they must be deeper than previous underground structures. In addition, many urban areas are located near surface water bodies (i.e., seas, rivers and/or lakes) that induce a shallow water table. The “cut and cover” method combined with dewatering wells is a frequently used procedure under these conditions for the construction of underground infrastructures. The main concerns of this procedure are related to the stability of the excavation bottom, the behavior of the retaining walls and/or the impacts induced by the dewatering actions. These issues must be evaluated, and new solutions must be proposed to improve its weak points. This paper compiles the main publications focused on the construction of underground infrastructures below the water table and in urban areas by using the cut and cover method combined with pumping. This review reveals that, despite many published studies, more research is needed to address some relevant issues such as: (1) the mitigation of dewatering impacts by using artificial recharge, (2) the adaptation of methods for characterizing retaining walls to be used under heterogeneous conditions, (3) the improvement of the prediction of surface settlements produced by pumping, and (4) the consideration of non-Darcy flows in the design of dewatering systems.