摘要
隧道洞口段处在偏压较严重地带时 ,施工难度相当大 ,渝怀铁路桓垭坝隧道采用地表加固 ,重新配载进洞。超前小导管预支护和钢格栅网喷联合支护 ,确保了隧道安全进洞 。
To overcome eccentric compression at tunnel portal, many technologies were adopted such as ground surface strengthening to redistribute the load, advance support combining small guide tube and wire mesh shotcreting, etc.
出处
《铁道标准设计》
2003年第4期13-14,共2页
Railway Standard Design
