During construction dewatering, artificial recharge with wells might be required to discharge the pumped groundwater. On the one hand, artificial recharge wells must be placed as close as possible to the construction site to limit the above-ground space for the dewatering infrastructure and the transport costs, while on the other hand, the distance from the dewatering site must be considerably large to reduce the hydraulic impact and minimize overall pumping costs. Commonly, artificial recharge wells are completed with filter screens that penetrate large portions of the aquifer. The present study investigates the efficiency and potential of artificial recharge with partially penetrating wells (PPWs; filter length of 1 m) in heterogeneous aquifers. This was done by conducting scenario modeling of simple dewatering schemes with one abstraction well and one artificial recharge well, as well as with experimental field tests. In these field tests, artificial recharge on a fully penetrating well (FPW), as well as on a PPW screened at a layer of relatively high permeability (300 m/day), is explored. The present study shows that the use of recharge PPWs screened at depth in high-permeability layers of the aquifer minimize the hydraulic impact at the dewatering site. Scenario modeling shows that recharge PPWs can be installed much closer to the dewatering site than FPWs. Assessment of the optimal screen depth of the PPW, as well as the mutual distance between the wells, requires a proper consideration of the vertical variability in the hydraulic conductivity of the aquifer.

在施工脱水过程中，可能需要对井进行人工补给，以排出泵送的地下水。一方面，人工补给井必须放置在尽可能靠近施工现场的位置，以限制地面上用于脱水基础设施的空间和运输成本，而另一方面，距脱水现场的距离必须相当大大以减少液压冲击并最大程度地降低整体泵送成本。通常情况下，人工补给井是用能穿透大部分含水层的滤网完成的。本研究调查了非均质含水层中部分穿透井（PPW；过滤器长度为1 m）的人工补给的效率和潜力。这是通过使用一口采油井和一口人工补给油井进行简单脱水方案的情景建模以及实验现场测试来完成的。在这些现场测试中，研究了在完全渗透井（FPW）以及在相对较高渗透率（300 m / day）层筛选的PPW上的人工补给。本研究表明，在含水层高渗透率层中进行深度筛选的补给PPW的使用可最大程度地降低脱水现场的水力影响。方案建模显示，补给PPW可以比FPW安装得更靠近脱水地点。评估PPW的最佳筛网深度以及井之间的相互距离，需要适当考虑含水层水力传导率的垂直变化。