摘要
新建沪昆客专湖南段磨把公隧道出口段近800 m为连续浅埋全风化花岗岩,施工采用常规的短台阶工法,超浅埋和强富水地段采用袖阀管注浆和井点降水预加固,加强开挖支护参数等措施,有效控制了变形沉降和坍塌事故发生。在此基础上,研究总结了全风化花岗岩变形规律,提出了预防与控制措施,可为同类工程施工提供参考。
There is about 800m of continuous shallow buried fully weathered granite at the exit of The Mobagong Tunnel in Hunan section of Shanghai-Kunming Passenger Dedicated Line, for which short benching tunneling method of construction is adopted. In the super shallow buried and water rich section, sleeve valve pipe grouting, well-points dewatering are used to strengthen the excavation support parameters. These methods enable the effective control of the deformation and collapse accident. On this basis, this paper makes study on deformation law of the fully weathered granite, and put forward preven-tion and control measures, which can provide a reference for similar engineering construction.
出处
《铁道建筑技术》
2014年第3期1-4,12,共5页
Railway Construction Technology
关键词
全风化花岗岩
富水地段
浅埋隧道
短台阶法
the fully weathered granite
water rich section
shallow buried tunnel
short step method
