摘要
本文基于新建宝鸡至兰州客运专线范家窝隧道为例,介绍了位于黄土浅埋偏压地段,土体含水量大,有垮塌及地表开裂现象的隧道施工,通过对超前支护、掌子面预加固、初期支护及临时支护等关键施工工艺技术的论述,对三台阶七步开挖法施工过程中的拱顶沉降量、洞内收敛和地表沉降等变形规律归纳总结,为以后类似工程施工提供了相关的实践经验。
Based on the new Fanjiawo tunnel on the Baoji-Lanzhou Passenger Dedicated Line as an example,this article introduces the construction of a tunnel in a shallow-buried and unsymmetrical loess section with large soil water content,collapse and surface cracking.Through the discussion of key construction techniques such as advanced support,pre-reinforcement of the tunnel face,initial support and temporary support,the settlement of the vault,convergence in the cave and surface settlement and other deformation laws during the construction of the three-step seven-step excavation method are discussed,which provides relevant practical experience for the construction of similar projects in the future.
作者
于龙
YU Long(The No.3 Engineering Co.,Ltd.of China Railway 14th Bureau Group Corporation,Ji'nan 250300,China)
出处
《价值工程》
2021年第12期119-121,共3页
Value Engineering
关键词
浅埋
地表开裂
黄土隧道
三台阶七步开挖
施工技术
shallow buried
surface cracking
loess tunnel
three-step seven-step excavation
construction technology
