隧道燕尾段施工方案探讨

Probe into the Construction Scheme for Tunnel's Dovetail Section

随着铁路建设的不断发展,隧道断面已不仅仅是单一的单线或双线隧道,隧道由单洞双线隧道分叉变为双单洞单线隧道或由双单线隧道汇合成双线单洞双线隧道等结构形式不断出现,该类隧道燕尾段施工方案的选定决定施工的安全。以西属巴隧道为例对燕尾段施工方案进行了探讨。

Along with the continuous development of railway construction, tunnel＇ s cross section is not only a single or double line tunnel, the structural form of tunnel has been changed from single-hole double-line tunnel Single hole double line tunnel fureation into double （ single ）-hole single-line tunnel or double-line single-hole tunnel and double-line tunnel jointed by double （single）-line tunnel, and the selection of the construction scheme for such tunnels＇ dovetail section determines the safety of the construction. Taking Xishuba Tunnel as an example, this paper probes into the construction scheme for the dovetail section.