【摘要】 介绍了青山隧道的Ⅱ、Ⅲ类围岩地段采用超短台阶法施工,Ⅳ类围岩地段采用全断面法施工以及超前长管棚施工、超前小导管施工、超前锚杆施工的工艺。更多还原

【Abstract】 This paper introduces the construction techniques of Qingshan tunnel,for example,extra - short bench construction for class II and Ⅲ adjacent rock sections,full face construction and tunneling with ad - vanced long pilot pipes,small pilot pipes and rock bolting for class Ⅳ adjacent rock sections.更多还原