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1 工程概况溢洪道工程位于左岸,包括引渠段、闸室段和退水渠段及溢洪道至大坝的交通道路。开挖轴线长330余米,开挖后底宽55.3m,两岸渠坡开挖高度60～65m,最大坡高70m。溢洪道上部为∈_2豹皮灰岩、鲕状灰岩;下部约25m 为∈_1~(16)、∈_1~(17)灰页岩。引渠段有F_(12)、F_(13)陡倾角正断层与中心线相交,退水渠段有 F_(14)、F_(123)陡倾角正断层与中心线相交,其中 F_(14)破碎带宽达3m,其余断层破碎带宽度不足1m,两岸坡下部灰、页岩互层,须采用控制爆破,减少振动影响。
1 Project Overview Spillway works are located on the left bank, including the drainage channels, gate chamber and backwater channels and the spillway to dam traffic roads. Excavation axis 330 meters long, bottom width after excavation 55.3m, both sides of the slope excavation height of 60 ~ 65m, the maximum slope height of 70m. The upper part of the spillway is é_2 leopard limestone and oolitic limestone; the lower part of 25m is ∈_1 ~ (16), ∈_1 ~ (17) shale. The normal fault with F_ (12) and F_ (13) steep dip at the main drainage channel intersects with the centerline, and the normal fault with F_ (14) and F_ (123) steep dip intersects with the centerline in the drainage channel, where F_ (14) Bandwidth of 3m, the rest of the fault broken width less than 1m, both sides of the slope of the lower ash, shale interphase, to be controlled blasting to reduce the impact of vibration.