某超小净距隧道施工过程分析及研究

Analysis and Study on Construction Process of a Neighborhood Tunnel

该文通过模拟某超小净距隧道在V级围岩条件下的施工过程,针对主洞拱顶处、中夹岩处围岩变形值及支护内力值对拉锚杆内力值随开挖过程的变化趋势,提出了小净距隧道初期支护、中夹岩的设计思路及施工中的监测重点。此外,利用承载拱理论推导出小净距隧道中夹岩及二次衬砌的受力模型。共成果可为今后类似研究提供一定的借鉴。

The article puts forward the design idea of the primary support,and sandwich rock and the monitoring emphasis of construction for the neighborhood by simulating the construction process of a neighborhood tunnel under the condition of V-class wall rock and aiming at the variation tendency of wall rock deformation values and support inner force value at the main tunnel vault and sandwich rock on the anchor inner force value with the excavation process.Moreover,the use of bearing arch theory can deduce the stress model of sandwich rock and secondary lining in the neighborhood tunnel.Its result can be referred for the similar studies.