筐家Ⅰ号隧道洞口偏压段处理技术

Treatment Technology for Biased Pressure Section at Kuangjia 1# Tunnel Portal

摘要:

筐家Ⅰ号隧道是六安至岳西(黄尾)高速公路霍山县境内的一座左、右分离式单向行车隧道，从设计、施工方面对隧道洞口段Ⅴ级围岩偏压复合式衬砌、明洞暗进、半明半暗等方案的应用进行了探讨，重点讨论了隧道明洞暗进、半明半暗方案穿越洞口浅埋偏压段的工程经验，为类似隧道的建设提供技术参考。

Abstract:

Kuangjia 1# tunnel is a separation type of one-way driving tunnel. The paper discussed the design and construction of biased pressure compound lining for V-grade surrounding rock at the tunnel portal, open tunnel subsurface excavation, half light and half dark and so on; and put emphasis on discussing the engineering experience of crossing shallow embedded under biased pressure section at tunnel portal with construction scheme of open tunnel subsurface excavation and half light and half dark.