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渔子溪二级水电站引水隧洞支护,计有钢筋混凝土、浇注混凝土、喷射混凝土、锚喷和不衬砌等五种类型。 引水隧洞总长为7723m(包括汛期引水隧洞112m)。断面为圆形和马蹄形,开挖断面36～42m~2,隧洞纵坡3.536‰～6.639‰。喷锚衬砌段总长5455m,为隧洞全长的70.8％。喷射混凝土量为25100m~3,锚杆10530根,喷敷混凝土面积96281m~2。 隧洞最大埋深830m。岩体为花岗闪长岩、石英岩、变质岩等,较完整,坚固系数f=2～7之间,属13～14级岩类。岩石单位弹抗系数K_0=150～900kg/cm~3,湿抗压强
Yizhixi Hydropower Station diversion tunnel support, there are reinforced concrete, concrete pouring, shotcrete, anchor spray and do not lining and other five types. The total length of diversion tunnel is 7723m (including flood diversion tunnel 112m). The cross section is round and horseshoe, the excavation section is 36 ~ 42m ~ 2, and the tunnel longitudinal slope is 3.536 ‰ ~ 6.639 ‰. The total length of shotcrete lining segment is 5455m, which is 70.8% of the total length of the tunnel. The amount of shotcrete 25100m ~ 3, anchor 10530, spraying concrete area 96281m ~ 2. The maximum depth of the tunnel 830m. The rock mass is granodiorite, quartzite and metamorphic rock. The rock mass is relatively complete with strong coefficient f = 2 ~ 7, belonging to 13 ~ 14 rock class. Rock unit elastic coefficient K_0 = 150 ~ 900kg / cm ~ 3, wet compressive strength