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作为深基坑地下水控制中的一项环境保护补充措施,目前软土地区深基坑地下水抽灌一体化设计在工程降水领域的应用仍属于探索阶段。根据回灌目的含水层的性质、回灌目的、地下水控制类型、止水帷幕性质、回灌井布设方式等,深基坑地下水回灌分为若干类型。通过对深基坑地下水回灌的探讨,分析了不同类型回灌设计的特殊性,提出了深基坑工程抽灌一体化运行控制设计流程和方法,包括深基坑地下水控制预分析、专项水文地质试验、基坑围护-降水一体化初步设计、回灌井井数初步设计、回灌井平剖面概念设计、基于三维地下水渗流分析的抽灌一体化设计和回灌井运行控制系统设计。
As a supplement to environmental protection in groundwater control of deep foundation pit, the integrated design of groundwater pumping in deep foundation pit in soft soil area is still in the exploratory stage in the field of engineering precipitation. According to the nature of the aquifer for recharge purposes, the purpose of recharge, the type of groundwater control, the nature of the water stop curtain and the layout of the recharge well, groundwater recharge of deep foundation pit is divided into several types. Based on the discussion of groundwater recharge in deep foundation pit, this paper analyzes the particularity of different types of recharge design, and puts forward the design flow and method of integrated control of pumping and filling of deep foundation pit project, including pre-analysis of groundwater control of deep foundation pit, special hydrology Geological experiment, preliminary design of foundation pit enclosure - precipitation integration, preliminary design of well number of injection well, conceptual design of injection well profile, design of integrated pumping and irrigation and operation control system of injection well based on 3D groundwater seepage analysis.