大跨隧道穿越浅埋偏压段处理方案探讨

Discussion on treatment scheme of large-span tunnel crossing shallow buried biased section

滁淮高速琅琊山隧道为大跨隧道,定远端洞口穿越浅埋偏压段,结合现场地形、地质条件,提出了暗挖方案、路基方案、明洞方案三种处理方案,通过对各方案进行论证分析,经综合比选研究后,推荐采用暗挖方案穿越隧道浅埋偏压段。

The Langyashan Tunnel of Chuhuai Expressway is a large-span tunnel,The tunnel entrance of Dingyuan cross shallow buried biased section.Combining topographic and geological conditions on site,The paper proposes three treatment schemes,which are underground excavation scheme,foundation scheme,and open excavation scheme.Through demonstration and analysis of various schemes,after comprehensive comparative study,it is recommended to adopt the underground excavation scheme to cross the shallow buried biased section.