隧道浅埋、露顶地段反压回填暗挖施工技术  

Construction Technology of Back Pressure Backfilling and Underground Excavation in Shallow-Buried and Top-Exposed Section of Tunnel

作　　者：李晋峰[1] 夏龙[1] 

机构地区：[1]中铁一局集团第五工程有限公司,宝鸡721006

出　　处：《北方交通》2012年第8期92-95,共4页Northern Communications

摘　　要：凤凰山隧道在距进口210～250m处与沟壑平交,导致洞身21m浅埋17m拱顶外露,通过对三种施工方法的比选确定采用10%水泥稳定碎石反压回填,在地表注浆固化形成壳体后实施暗挖。施工实践证明该方法合理有效,故对其施工技术和工艺要求进行总结,为类似工程提供参考或借鉴。The Phoenix Hill Tunnel crosses with gully parallelly from 210 -250m of the entrance, which leads to 21m of the cave body shallow buried,and 17m of arch top exposed. Through the comparison and selection among three construction methods, 10% cement stabilized macadam back pressure backfilling method is adopted, and underground excavation is implemented after shell forming through grouting and curing of the earth surface. The con- struction practice shows that this method is reasonable and effective, so its construction technology and technological requirement are summarized, thus providing references for similar projects.

关 键 词：浅埋 露顶 反压回填 地表注浆 暗挖 明洞暗作 

分 类 号：U455[建筑科学—桥梁与隧道工程]