徐家梁子隧道进出口施工方法  

Construction techniques of the entrance and exit portal sections of Xujialiangzi tunnel

作　　者：张广洋[1] 游泳[1] 姚振武[1] 

机构地区：[1]四川攀西高速公路开发股份有限公司,成都610041

出　　处：《现代隧道技术》2005年第3期70-75,共6页Modern Tunnelling Technology

摘　　要：徐家梁子隧道右线进口端位于Ⅱ超浅(2)类软弱围岩中,采用掏槽扩帮法施工;出口端于Ⅱ超偏(1)、Ⅱ超浅(2)、Ⅱ超(2)类软弱围岩中,采用嵌拱修边法施工。两种施工方法在不同地质条件下均获得较好的开挖效果。On the entrance section of the right line of Xujialiangzi tunnel super-shallowly embedded in surrounding rock grade II, a center cut and side enlargement method is used for construction. On the exit portal section of the tunnel embedded in surrounding rock grade II with super unsymmetrical pressure and shallow depth, a Belgium method is used for construction. Good results of excavation are acquired by using these two methods.

关 键 词：公路隧道 掏槽扩邦法 嵌拱修边法 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]