公路2车道隧道施工组织设计.doc

两隧道均为上、下行分离的双洞单向行驶2车道隧道。元墩1号隧道上行隧道里程为K0+875~K1+175，长300m，为3.685%上坡；下行隧道里程K0+853~K1+160，长307m，为3.800%上坡。元墩2号隧道上行隧道里程为K1+267~K1+730，长463m，为3.681%下坡；下行隧道里程为K1+240~K1+593，长353m，为2.689%下坡。
两隧道设计净宽9.75m，净高5.0m。Ⅱ类围岩最大开挖宽度12.44m，最大开挖高度9.88m。隧道采用锚喷砼做初期支护，复合式衬砌。
Two tunnels are on the two-hole one-way downlink traffic separated 2-lane tunnel. Yuen Tun uplink Tunnel 1 Tunnel mileage K0 +875 ~ K1 +175, length 300m, uphill to 3.685%; downstream tunnel length K0 +853 ~ K1 +160, length 307m, uphill to 3.800 percent. Yuen Tun tunnel 2 miles up the tunnel for the K1 +267 ~ K1 +730, length 463m, was 3.681% downhill; down the tunnel mileage K1 +240 ~ K1 +593, length 353m, to 2.689 percent downhill.
Net width two tunnel design 9.75m, net height of 5.0m. Maximum width of rock excavation Class Ⅱ 12.44m, maximum digging height 9.88m. Tunnel shotcrete initial support to do concrete, composite lining.