摘要
某运营高铁隧道穿过第四系黏土、砂土层,地下水发育,最大覆土厚度仅10.5 m;原设计为V形纵坡,采用全包防水,机械抽水.运营不到5年,不间断地发生了道床板底座翻水、施工缝渗水等病害.正确分析原设计方案的合理性及施工措施的可行性,准确找出渗水原因,采用洞外止水帷幕、洞内缝隙引排或封堵的综合整治措施,成功止水.洞外止水帷幕方案,科学合理、适用有效,为浅埋隧道水害整治提供了新的思路.
A running high-speed railway tunnel goes through Quaternary clay, sandy soil layer, the groundwater is developed and its maximum overlying soil thickness is merely 10.5 meters. The original design was a V-shaped slope which adopted full package waterproof and mechanical pumping. After operating in less than 5 years, water flowed out over the foundation of the track slab and penetrated from the construction joints frequently. After a proper analysis of the original design and the construction measures, we found out the cause of seepage. The problem has been solved successfully by adopting integrated measures which include waterproof curtain outside the tunnel and draining or sealing the joints inside the tunnel. Waterproof curtain is scientific, applicable and effective, and it is a new way of controlling water damage in shallow buried tunnel.
作者
张国权
Zhang Guoquan(Survey and Design Institute,China Railway 11th Bureau Group Co.Ltd.,Wuhan Hubei 430074,China)
出处
《铁道建筑技术》
2018年第A02期184-188,共5页
Railway Construction Technology
关键词
浅埋隧道
V形纵坡
水害
原因分析
止水帷幕
shallow buried tunnel
V-shaped slope
water damage
cause analysis
waterproof curtain
作者简介
张国权(1979一),男,工程师,主要从事隧道与地下工程的勘察设计工作。
