中寨子隧道浅埋偏压段设计方案比选

摘要

In vation method and combination of engineering practice, comparison and selection of schemes between cover - exca- open - cut method is conducted and design points and construction technology of cover - excava- tion are introduced. Research shows that cover - excavation method can heavy excavation at tunnel portal section at the same time so as to protect ensure the stability of massif and avoid ecological environment.%结合工程实例,对盖挖法和明挖法进行了方案比选,介绍了盖挖法的设计要点和施工工序。研究表明,盖挖法可保证山体稳定,同时避免洞口段大开挖,保护生态环境。