回灌工程与降水工程结合是兼顾工程安全建设和地下水资源保护的有效措施。中心城区受到回灌场地和输水管线布设的限制，回灌区与降水区相距较近，回灌影响范围和降水影响范围有重叠，此时回灌和降水难免产生相互影响。以北京某地铁工程区间风井砂卵石潜水层降水回灌工程为例，结合现场试验、理论推导及数值分析，得出临近同层回灌使降水工程的基坑涌水量增加约40%，该研究对砂卵石等渗透性强潜水层回灌工程有一定工程指导意义。

The combination of recharge project and precipitation project is an effective measure that takes into account the safety of the project and the protection of groundwater resources. The central urban area is restricted by the layout of recharge sites and water pipelines. The recharge area is close to the precipitation area, and the scope of recharge and precipitation affect overlap. At this time, recharge and precipitation will inevitably have mutual effects. Taking the precipitation recharge project of a wind well sand and pebble diving layer in a subway project in Beijing as an example, combined with field tests, theoretical derivation, and numerical analysis, it is concluded that the recharge near the same layer will increase the flooding of the foundation pit by about 40%. The research has certain engineering guiding significance for the recharge project of sandy pebbles and other highly permeable submerged aquifers.

TU413