摘要
在病险水库除险加固工程中,对于承受内水压力为主的圆形水工隧洞的加固问题,最简单的处理方法是在原衬砌隧洞内增加钢衬,就可使隧洞达到结构安全和防渗要求。但在实际设计及施工过程中,对这种加固技术还存在适用条件认识不足,灌浆工艺及工序不到位,钢衬起始部位止水结构设计不当等问题。由此造成钢衬抗外压失稳、受水流冲击而翘曲等安全事故。针对圆形水工隧洞钢衬加固存在的问题,分析和讨论了钢衬加固的特点及其适应性,并总结了圆形水工隧洞钢衬加固的设计及施工要点。对今后隧洞钢衬加固的设计及施工具有一定的指导意义。
In the reinforcement of a dangerous reservoir,for circular-type hydraulic tunnel mainly affected by internal water pressure,the simplest treatment method is adding steel lining on the original lining tunnel,thus the tunnel safety and seepage prevention requirements can be met.But in practical design and construction,some problems,such as insufficient understanding on applicable condition,inadequate construction technology and construction procedure and improper design of water sealing structure at head location of steel lining etc.,often cause instability under external pressure of steel lining and warping by the impact of the flow.In view of the existed problems in steel lining reinforcement of hydraulic tunnel,we analyze and discuss the advantages and applicability of steel lining reinforcement,and summarize the key design and construction points of steel lining reinforcement for a circular-type hydraulic tunnel.
出处
《人民长江》
北大核心
2011年第12期56-59,共4页
Yangtze River
基金
国家"十一五"科技支撑计划"病险水库除险加固关键技术研究"(2006BAC14B04)
国家大坝安全工程技术研究中心资助项目(2009FU115×17)
关键词
钢衬
加固
灌浆
水工隧洞
steel lining
reinforcement
grouting
hydraulic tunnel
