About the author:

Guangzhou Metro Design & Research Institute Co., Ltd., Guangzhou, Guangdong 510420, China

Abstract:

With the increasing frequency of extreme climate events, urban rail transit system facesgrowing risks of floodwater intrusion. This paper systematically analyzes the applicability and limitationsof existing flood control measures targeting the vulnerable points of urban rail transit system （ stationentrance and exit,wind pavilion, and tunnel portal sections）。 The research shows that station entranceand exit commonly relies on passive flood barriers （for example, sandbags, manual plates），which sufferfrom slow response times, high labor dependency, and poor aesthetics. In contrast, the fully automaticbuoyancy-activated flood control plates for entrance and exit utilize physical buoyancy to achieveautomatic water blocking. It offers advantages in modularization, power-free operation, and rapidinstallation,with its effectiveness validated through practical application in multiple locations. Whileprotective airtight doors are effective for extreme scenarios, their deployment requires significantconversion time. Traditional manually assembled flood control plates for wind pavilion are inefficient. Thefully automatic buoyancy-activated flood control plates for station wind pavilion significantly enhancesresponse speed by relying on water buoyancy. Temporary sealing equipment designed for large windpavilion enables rapid sealing and secure storage through precision positioning and latching system. Fortunnel portal sections, sliding barriers or vertical rotation floodgates are employed. The latter integrateshydraulic drive, intelligent monitoring, and multi-stage locking system, enabling remote control andadaptability to complex conditions, though they require embedded structures and specializedmaintenance. Future flood control design must evolve towards automation, modularization, andintelligence. Tailored combined solutions, aligned with the characteristics of urban rail transit system,are essential to balance timeliness, reliability, and cost-effectiveness. This approach will provide crucialtechnical support for upgrading the flood control system of urban rail transit infrastructure.