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大跨扁平单洞4车道公路隧道开挖工法的选择和优化

Nan ZHAO,Jianhua WANG,Jianxin ZHANG

Technology of Highway and Transport（2018）

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Abstract
为了解决施工中双侧壁导坑法、环形开挖预留核心土法的开挖工序繁琐、施工进度慢的问题,以新疆境内小草湖至乌鲁木齐段改扩建工程项目中的单洞4车道隧道为背景,采用工程类比、监控量测技术手段,结合现场地质条件将开挖工法优化为CD法、上台阶半步CD法、上下台阶法,在确保施工安全前提下达到了简化开挖工序、提高施工效率的目的,总结了类似地质情况下大断面隧道开挖工法及注意事项.
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