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基于对风景区内环境保护和避免不良地质施做高边坡工程处理方式的原则,在隧道洞口区段采用浅埋暗挖法施工。本文介绍了某浅埋3车道隧道下穿群墓区洞穴施做扣拱的施工方法及相应的支护措施。大量的工程实践表明,对于下穿洞穴的浅埋大跨度软岩隧道施工,采用一般的导坑法开挖法,可以解决洞内掘进,但遇到洞顶埋深浅且有较大较为密集的洞穴,则应采取必要的辅助措施,保证施工期间安全生产。
Based on the principle of protecting the environment within the scenic area and avoiding the treatment of unfavorable geology, the project shall be constructed by the method of shallow burying and undercutting in the tunnel entrance section. This article describes the construction method and corresponding support measures of buckling arch in the cave of a shallow buried 3-lane tunnel passing through the group grave area. A large number of engineering practice shows that for the construction of shallow-buried long-span soft rock tunnels with under-penetrating caverns, the general excavation method of pilot excavation can solve the tunneling in tunnels, but it encounters the shallow buried depth and relatively dense Caves, you should take the necessary support measures to ensure safe production during construction.