公路隧道富水段可排水止水带应用浅析

Application of Drainage Waterstop in Rich Water Section of Highway Tunnel

针对隧道细部结构渗漏水问题,依托广州市南昆山隧道工程,对止水带结构进行优化设计和验算,对现场原设计止水带与优化后止水带进行了对比试验。结果表明:优化后的止水带满足安全使用的要求;试验段二衬混凝土表面干燥无渗水发生,外管无水流出,防水效果良好。优化后的止水带提高了细部结构的防排水能力,工程实践中保证了防水效果,具有较好的工程实践价值。

For the water leakage problem of the tunnel detail structure,optimal design and check are done for the waterstop in this paper based on the Nankunshan Tunnel project in Guangzhou.A contrast test is done between the original waterstop and the optimized one.The results show that the optimized waterstop satisfy the requirements of safe operation.The surface of the second lining concrete in the test section is dry,without water seepage,and the outer pipe has no water outflow,so the waterproof effect is good.The optimized waterstop improves the waterproof and drainage capacity of the detail structure,and ensures the waterproof effect in engineering practice,which has good engineering practice value.