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阿勒泰黄泥滩供水工程隧洞对于城门洞断面的钻爆法施工段,采用一次喷锚支护与二次钢筋混凝土衬砌相结合的复合式衬砌方式。一次喷锚支护作为永久衬砌结构的一部分,根据地质情况的不同,在洞周一定范围内打系统锚杆并挂网、喷混凝土,使洞体围岩成为一个承载结构,这样可以减少作用在二次支护结构上的荷载,充分发挥围岩的承载能力。
Altay Huangniatan Water Supply Project Tunnel For the blasting section construction section of Shing Mun-dong section, a composite liner with a combination of shotcrete and anchor support and secondary reinforced concrete lining is adopted. As a part of the permanent lining structure, according to different geological conditions, a shotcrete and anchor support shall be used to hit the system anchor rod and coat the net and spray the concrete within a certain range of the hole circumference so that the surrounding rock of the cave body becomes a bearing structure, so as to reduce the effect of Secondary support structure of the load, give full play to the carrying capacity of rock.