高寒地区特长隧道膨胀围岩初期支护设计施工

On the supporting design and construction in primary period of the expansive surrounding rock along the extra-long tunnel in highly cool areas

根据高寒地区乌鞘岭特长隧道的地质特点,介绍了高寒地区膨胀性围岩初期支护的设计与施工,以有效抑制围岩应力和变形,使上半断面施工、下半断面施工和仰拱施工形成有序的平行作业,确保隧道结构和施工安全。

According to the geographical characteristics of the extra-long turmel of Wuqiaoling in highly cool areas, the paper introduces the supporting design and construction of the expansive surrounding rocks in highly cool areas, so as to effectively restrain the stress and deformation of the surrounding rocks, to form the ordering parallel works by the upper broken section construction, the lower broken section construction and the repression construction, in order to ensure the tunnel structure and the construction safety.