JIXiaoyu.Application of the Intensive Underground Initial Rainwater Storage Tank at the Bottom of Lake[J].China Water & Wastewater,2026,42(2):83-89.
地下集约式湖底初雨调蓄池的工程实践
- Title:
- Application of the Intensive Underground Initial Rainwater Storage Tank at the Bottom of Lake
- Keywords:
- initial rainwater; storage tank; fully underground; intensive
- 摘要:
- 作为武汉市汤逊湖综合整治项目的重要组成部分，赵家池明渠初雨调蓄池采用地下集约化开发模式，在湖底构建有效容积9 000 m3、服务汇水面积约160 hm2的智能初雨调蓄系统。该系统包括分流井及进水箱涵、格栅间及消能井、调蓄池、冲洗系统、通风除臭系统和排空系统6个部分，集成智能分流、协同冲洗、微负压除臭等技术。设置导波管和拦污网，为超声波液位计联动速闭闸门实现精准截流提供保障；采用门式+喷射器协同冲洗系统，形成动态水力条件控制底泥淤积；应用静压植入（PC）工法钢管桩支护+双层Ⅳ型拉森钢板桩辅以湖底淤泥进行止水的体系，破解三侧邻水的施工困局，大大节约了成本。自2023年12月开始试运行至今，削减入湖污染物COD约137.87 t，总氮（TN）约2.81 t，总磷（TP）约1.12 t，具有良好的社会和经济效益。
- Abstract:
- As a crucial component of the Tangxun Lake comprehensive renovation project in Wuhan, the Zhaojiachi open channel initial rainwater storage tank adopted an intensive underground development model. Constructed at the bottom of lake, it formed an intelligent initial rainwater storage system with an effective volume of 9 000 m3 and a service catchment area of approximately 160 hm2. The system integrated six main components: a diversion well and inlet box culvert, a screen room and energy dissipation well, a storage tank, a flushing system, a ventilation and deodorization system, and an exhaust system. It incorporated advanced technologies such as intelligent flow diversion, coordinated flushing, and micro-negative pressure deodorization. To ensure precise flow control, guide wave pipes and trash racks were installed, linking the ultrasonic level meter with the rapid-closure gate. A coordinated gantry and sprayer flushing system created dynamic hydraulic conditions to control sediment deposition. The construction employed a press-in cell (PC) construction method steel pipe pile support system combined with double?layer Ⅳ-type Larsen steel sheet piles, supplemented by lake sediment for waterproofing. This approach successfully resolved the construction dilemma of three sides facing water and significantly reduced costs. Since its trial operation commenced in December 2023, the system has reduced the influx of key pollutants into the lake by approximately 137.87 t of COD, 2.81 t of TN, and 1.12 t of TP, demonstrating substantial social and economic value.
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