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(一)施工条件武都枢纽是嘉陵江主要支流涪江上的一个梯级,位于武都镇下游5公里,交通尚称方便,宝成铁路通过下游左岸,坝址区域气候温和,年平均温度16.2℃,一年中低于零度者甚少,多年平均雨日约123天,实测最大瞬时流量为3,270秒公方,历年最大日平均流量为2,130秒公方,根据17年统计资料推算5%频率流量达2,850秒公方,最小流量50秒公方,洪水期多在7—9月。洪峯历时一般为5天左右,来水多里陡涨陡落的多峯形状。坝址约在七里坡背斜的东南翼,构造简单,无较大的折曲断裂现象,大坝基础属上侏罗纪广元统的砂页岩互层,岩层倾向下游产状平缓,砂岩的抗压
(A) Construction Conditions Wudu Junction is a cascade on the Fujiang River, a major tributary of the Jialing River. It is located 5 kilometers downstream of Wudu Town. Traffic is still convenient. Baocheng Railway passes the left bank of the downstream and the climate in the dam site is mild. The annual average temperature is 16.2 ℃, The average annual rainfall is 123 days. The maximum observed instantaneous flow rate is 3,270 seconds. The maximum daily average flow rate in past years is 2,130 seconds. Based on 17 years of statistical data, 5% of the frequency flow rate is reached 2,850 seconds to the public, the minimum flow of 50 seconds to the public, the flood period mostly in July-September. Flood peak lasted generally about 5 days, to plunge up steep fall multi-peak shape. The dam site is located in the southeast wing of the Qilipo anticline with simple structure and no large bending and fracture phenomena. The dam foundation is interbedded with the Guangsha system of sandstone in the Jurassic. The downstream of the slope tends to be gentle. The sandstone Compression