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一、概述紧水滩水电站工程施工期采用隧洞导流方式。导流标准为枯水期5%频率,相应设计流量为2024m~3/S。导流洞的断面为城门洞型,全长476m,纵坡为0.236%,开挖断面洞高16.4～19.7m、宽10.6～14.0m(见图1)。衬砌后的断面尺寸为高15.7m、宽10m(见图2)。
I. Overview Jishuitan Hydropower Station project construction period using the tunnel diversion. The diversion standard is 5% of the dry season, and the corresponding design flow is 2024m ~ 3 / S. The section of the diversion tunnel is of the type of gate with a total length of 476m and a longitudinal slope of 0.236%. The hole height of the excavation section is 16.4-19.7m and the width is 10.6-14.0m (see Figure 1). After lining the section size is 15.7m high and 10m wide (see Figure 2).