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一、工程概况××坑道位于长江北岸,是我市平战结合的骨干工程之一,始建干1975年,面积26500米~2,其主干道全长1715米,地质条件较差,系灰色页岩、石英砂岩互层,岩层破碎,断层较多,岩层走向基本与坑道轴线平行,施工难度较大;初始支护,采用100～150毫米厚喷锚网,直墙拱顶型式;二次支护,采用450～550毫米厚模注钢筋混凝土被复,净幅员6.0×4.5米;截至1986年6月止,主干道已完成165O米,面积16933.55米~2预计年底即可投入使用;规划用途:战时为人防专业队的车库,平时为地下停车场和仓库。
First, the project profile × × Tunnel is located in the north bank of the Yangtze River, is the city of one of the backbone of the combination of peacetime war, was built in 1975, an area of 26,500 m ~ 2, the main road length of 1715 m, poor geological conditions, gray Shale and quartz sandstone are interbedded. The rock layers are broken and there are many faults. The strike of the rock strata is basically parallel to the axis of the tunnel, which makes it difficult to construct. For the initial support, the bolting net with the thickness of 100-150 mm is used, Support, using 450 ~ 550 mm thick reinforced concrete injection molding is complex, the net size of 6.0 × 4.5 meters; as of June 1986, the main road has been completed 165O meters, an area of 16933.55 m ~ 2 is expected to be put into use by the end of planning; Uses: wartime civil air defense professional team garage, usually for underground parking and warehouses.