超大断面隧道浅埋段半明半暗施工技术研究
|
摘要
京沪高速济南连接线工程浆水泉隧道穿越黄金谷风景区,该区段属浅埋、超浅埋及局部浅埋等突变地形,施工难度大,环保要求高。通过对该区段的地质情况进行分析和总结,特别针对局部浅埋区段采用先明挖先行导坑上部覆盖土,再暗挖剩余岩层,先行导坑初支封闭后回填,最后开挖剩余导坑的技术,减少了对山体的扰动,小机械开挖的同时降低了对风景区的环保破坏,施工速度快,通过数值模拟分析,表明该方法的安全性满足要求,研究结论可供类似工程参考。
The Beijing-Shanghai high-speed Jinan connecting line engineering slurry water spring tunnel passes through the Golden Valley Scenic Area. The section of the area is a sudden terrain such as shallow burial,ultra-shallow burial,and partial shallow burial. The construction is dif?cult and the Environmental Protection requirements are high. This paper analyzes and summarizes the geological conditions of this section,especially for the partially shallow buried section,the upper cover of the first excavation of the upper part of the guide pit is used to excavate the remaining rock formations,and the initial support of the guide pit is closed and back?lled,and the technique of excavating the remaining guide pit is ?nally used. It reduces the disturbance to the mountain,the small mechanical excavation reduces the Environmental Protection damage to the scenic spot,and the construction speed is fast. The numerical simulation shows that the safety of this method meets the requirements.The research conclusions in this paper can be used for similar engineering reference.
The Beijing-Shanghai high-speed Jinan connecting line engineering slurry water spring tunnel passes through the Golden Valley Scenic Area. The section of the area is a sudden terrain such as shallow burial,ultra-shallow burial,and partial shallow burial. The construction is dif?cult and the Environmental Protection requirements are high. This paper analyzes and summarizes the geological conditions of this section,especially for the partially shallow buried section,the upper cover of the first excavation of the upper part of the guide pit is used to excavate the remaining rock formations,and the initial support of the guide pit is closed and back?lled,and the technique of excavating the remaining guide pit is ?nally used. It reduces the disturbance to the mountain,the small mechanical excavation reduces the Environmental Protection damage to the scenic spot,and the construction speed is fast. The numerical simulation shows that the safety of this method meets the requirements.The research conclusions in this paper can be used for similar engineering reference.
引文
[1]周长学.浅埋偏压隧道施工技术[J].交通世界,2012(15):216-217.
[2]房志群,林明星.关于浅埋、偏压及软弱围岩隧道施工技术的探讨[J].中国新技术新产品,2008(10).
[3]王书刚,李术才,王刚,等.浅埋偏压隧道洞口施工技术及稳定性分析研究[J].岩土力学,2006(27):364-368.
[4]杨小礼,眭志荣.浅埋小净距偏压隧道施工工序的数值分析[J].中南大学学报,2007,38(4):764-770.
[5]公路隧道施工技术规范:TG F60-2009[S].
[6]公路隧道施工技术细则:JTG/T F60-2009[S].
[7]赵飞,张建.半明半暗结构在浅埋偏压黄土隧道进洞施工中的应用[J].交通世界(上旬刊),2017(2):112-113.
[8]杨涛.三道岭隧道浅埋段施工综合治理技术[J].国防交通工程与技术,2016,14(1):78-80,18.
[2]房志群,林明星.关于浅埋、偏压及软弱围岩隧道施工技术的探讨[J].中国新技术新产品,2008(10).
[3]王书刚,李术才,王刚,等.浅埋偏压隧道洞口施工技术及稳定性分析研究[J].岩土力学,2006(27):364-368.
[4]杨小礼,眭志荣.浅埋小净距偏压隧道施工工序的数值分析[J].中南大学学报,2007,38(4):764-770.
[5]公路隧道施工技术规范:TG F60-2009[S].
[6]公路隧道施工技术细则:JTG/T F60-2009[S].
[7]赵飞,张建.半明半暗结构在浅埋偏压黄土隧道进洞施工中的应用[J].交通世界(上旬刊),2017(2):112-113.
[8]杨涛.三道岭隧道浅埋段施工综合治理技术[J].国防交通工程与技术,2016,14(1):78-80,18.