不良地质公路隧道进洞关键施工技术研究

Research on the Key Construction Technology of the Tunnel in Bad Geology

近年来,我国高速公路建设发展迅速,通车总里程突破60000km。当前高速公路规划逐渐走向山区,隧道建设逐年增加,隧道进洞成为公路隧道建设施工中的难点之一。本文结合黄千高速隧道工程,在洞口地质条件差的前提下,确定了“套拱+管棚+明洞”的进洞方案,并详细介绍了相关施工工艺,从而既保证山体稳定、顺利进洞,又保证工程顺利开展。

In recent years,China's highway construction has developed rapidly,with a total mileage of 60,000km.At present,highway planning is gradually moving towards mountainous areas,and tunnel construction is increasing year by year.Tunnel entry has become one of the difficulties in highway tunnel construction.This paper combined with the Huangqian high-speed tunnel project,on the premise of poor geological conditions at the entrance,determined the"jacket+pipe shed+open hole"entry plan,and introduced in detail the relevant construction technology,so as to ensure the stable and smooth entry of the mountain Hole,and ensure the smooth progress of the project.