复杂条件下城市大型地下泵站设计关键问题研究

Research on key issues in the design of large urban underground pumping stations under complex conditions

摘要

公明水库—清林径水库连通工程是珠江三角洲水资源配置工程在深圳境内配套项目之一，是深圳市骨干水网重要组成部分。坂雪岗-苗坑水厂加压泵站采用地下泵站型式，采用2个泵组，坂雪岗泵组为坂雪岗水厂供水(2用1备),苗坑泵组为苗坑水厂供水(2用1备),共装6台卧式离心泵(4用2备),并为苗坑水厂布置1条连通管道，供清林径水库向苗坑水厂自流供水时使用。主泵房开挖尺寸为118.3×17.0×29.85 m(长×宽×高)。结合深圳市城市空间地面用地紧张、周边环境要求高的特点，详细介绍了坂苗泵站的整体设计思路，介绍了泵站总体布置方案、厂内布置设计、开挖稳定控制、地下排水方案及安全监测设计等关键技术问题。

Abstract

The Gongming Reservoir-Qinglinjing Reservoir Connection Project is one of the supporting projects of the Pearl River Delta Water Resources Allocation Project within Shenzhen city, serving as a crucial component of Shenzhen's backbone water network. The Banxuegang-Miaokeng Pump Station adopts an underground pumping station design, comprising two pump units: the Banxuegang unit supplies water to Banxuegang Waterworks(2 operational + 1 standby), while the Miaokeng unit serves Miaokeng Waterworks(2 operational + 1 standby). The station is equipped with six horizontal centrifugal pumps in total(4 operational + 2 standby), and includes a dedicated connecting pipeline for Miaokeng Waterworks to enable gravity-fed water supply from Qinglinjing Reservoir. The main pump chamber features excavation dimensions of 118.3×17.0×29.85 m(L×W×H). Considering Shenzhen's urban spatial constraints and stringent environmental requirements, this paper elaborates on the comprehensive design philosophy of the Banmiao Pump Station, detailing key technical aspects including: overall station layout planning, arrangement design, excavation stability control, underground drainage solutions and safety monitoring system design.

关键词

城市空间 / 大型地下泵站 / 总体布置 / 围岩稳定 / 支护设计

Key words

urban space / large underground pumping station / overall layout / stability of surrounding rock / supporting design

Author summay

孟 刚(1981—), 男, 高级工程师, 硕士, 主要从事水利水电建筑物设计研究工作。E-mail: [e-mail]