价值工程导向的地铁风井排水系统集约化设计与综合效益研究

Research on Intensive Design and Comprehensive Benefits of Metro Ventilation Shaft Drainage System Oriented by Value Engineering

摘要:

为解决传统地铁风井“一井一坑”排水模式导致的项目建设期投资增加、施工风险高及运维成本大等问题，运用价值工程理论，提出了集约化设计优化新方案。以某地铁8号线工程为例，构建了“新风井独立、排/活塞风井共用集水坑”的“1+1”双核模型。通过暴雨强度流量计算与环控工况分析，验证了该系统排水能力与火灾工况下的安全性。全生命周期成本分析表明，减少了72%的集水坑数量，降低初期投资584.70万元，全周期成本节约19.2%，实现了安全性、经济性与环境适应性三者的统一，为城市轨道交通附属结构的精细化设计提供了新的理论依据与实践参考。

Abstract:

To address the issues such as increased investment during the project construction period, high construction risks and high operation and maintenance costs caused by the traditional “one well, one pit” drainage mode of metro ventilation shafts, the value engineering theory is used to propose an optimized integrated design scheme. Taking a Metro Line 8 Project as an example, a “1+1” dual-core model is constructed, featuring an independent fresh air shaft and a shared sump for exhaust and piston air shafts. Through the calculation of rainstorm intensity and flow rate and the analysis of environmental control conditions, the drainage capacity of the system and its safety under fire conditions are verified. The analysis on life-cycle cost shows that the number of sump pits is reduced by 72%, the initial investment is lowered by 5.847 million yuan, and the full-cycle cost is saved by 19.2%, which achieves the unity of safety, economy and environmental adaptability, providing a new theoretical foundation and practical reference for precision design of urban rail transit ancillary structures.