浅埋大断面黄土隧道安全快速施工方案探讨

浅埋大断面黄土隧道施工易塌方,设计考虑采用侧壁导坑法,在现场施工期间,出现了施工进度慢,施做不到位引起的开裂变形甚至塌方等问题。基于浅埋大断面黄土隧道的变形特性,结合传统矿山法、新意法、预切槽法等施工方法的技术特点,提出了浅埋、大断面黄土隧道不同工况下安全、快速的施工方案。

Discussion on Safe and Swift Construction of Shallow-buried Large Section Loess Tunnel

A shallow and large section loess tunnel is prone to large deformation and abrupt collapse.But the design with side drift method causes problems of slow progress,poor quality of construction,large deformation even collapse during the construction.Based on the deformation characteristics of the shallow buried loess tunnel with large cross section,combined with characteristics about the construction technique such as the traditional mining method,ADECO-RS,pre-lining supporting method,etc.,the paper presents the safe and quick construction of loess tunnels under different conditions with shallow buried depth and large section.