摘要
Abstract
Concrete grouting is an important part of the secondary lining construction of tunnel arch walls.The construction difficulty of the secondary lining of super large section water rich loess tunnel arch walls is relatively high.Therefore,the secondary lining concrete pouring construction is completed through advanced support,waterproof concrete mix design and preparation,and concrete spraying.The example analysis results show that the tensile strength and strength safety factor of concrete are both greater than the minimum limit,which meets the requirements of relevant specifications.The design technology can ensure construction quality and provide reference for similar projects.关键词
高速铁路/超大断面/富水黄土隧道/二次衬砌/混凝土灌注/超前支护Key words
High-speed railway/Super-large section/Water-rich loess tunnel/Secondary lining/Concrete pouring/Advanced support分类
交通工程
