摘要
乐西高速大凉山1号隧道地质条件复杂、气候条件恶劣,受自然保护区限制选线困难。文章提出最大限度降低越岭高程的设计思路,以保障运营安全。通过设置贯通平导、选择隧道掘进机法与钻爆法组合的施工工法、优化隧道通风方案,解决超特长隧道施工工期、防灾救援等难题,降低了施工风险,提高了防灾救援效率,项目总体功能和施工运营安全性达到较优。通过项目实施及研究表明,超特长隧道采用主线隧道+贯通平导的建设方案是可行的,对于西部山区超特长高速公路隧道的建设具有一定的借鉴意义。
The geological conditions of the Daliangshan No.1 Tunnel on the Leshan-Xichang Expressway are com⁃plex,and the climate conditions are harsh,making it difficult to select the road alignment due to restrictions from the nature reserves.This paper proposes a design concept to minimize the elevation of the ridge crossing section to ensure operational safety.By setting up a fulllength parallel heading,selecting a combination of tunnel boring ma⁃chine(TBM)method and drilling and blasting method for construction,and optimizing the tunnel ventilation scheme,the challenges regarding construction period and disaster prevention and rescue of the ultra-long tunnel are addressed,reducing construction risks and improving disaster rescue efficiency.The overall function,the construc⁃tion and operation safety of the Project are optimized.The relevant research and implementation of the Project show that the construction scheme of the main tunnel+full-length parallel heading for ultra-long tunnels is feasible and has certain reference significance for the construction of ultra-long expressway tunnels in western mountainous areas.
作者
李玉文
蔚艳庆
LI Yuwen;WEI Yanqing(Sichuan Highway Planning,Survey,Design and Research Institute Co.,Ltd.,Chengdu 610041)
出处
《现代隧道技术》
CSCD
北大核心
2024年第2期232-240,共9页
Modern Tunnelling Technology
关键词
总体设计
特长隧道
贯通平导
敞开式掘进机
设备改造
Overall design
Extra-long tunnel
Full-length parallel heading
Open TBM
Equipment modification
