大河口水電站(zhan)位于重(zhong)慶市酉(you)陽縣境內阿蓬(peng)(peng)江(jiang)大灘(tan)河段,是阿蓬(peng)(peng)江(jiang)梯(ti)級(ji)開發(fa)的(de)第八個(ge)梯(ti)級(ji)水利樞(shu)紐(niu)工程,是流域內九個(ge)梯(ti)級(ji)開發(fa)最 大的(de)一個(ge)。壩址(zhi)控制流域面積4619km2,總(zong)庫(ku)容1.15億m3,總(zong)裝機7.5萬KW, 年發(fa)電量3.75億KW·h。是一座以發(fa)電為主,兼有防(fang)洪、灌溉、養殖、旅游開發(fa)等綜(zong)合效益的(de)水電工程。
電(dian)站樞紐工(gong)程由攔河壩(ba)(ba)、發(fa)電(dian)廠(chang)房、戶內式開關站等組(zu)(zu)成(cheng)。攔河壩(ba)(ba)為(wei)混凝(ning)土空(kong)腹重(zhong)力壩(ba)(ba),壩(ba)(ba)頂(ding)(ding)(ding)泄(xie)洪,壩(ba)(ba)高84.5m,壩(ba)(ba)頂(ding)(ding)(ding)長393.3m。左(zuo)右岸(an)非溢流重(zhong)力壩(ba)(ba)長分別(bie)(bie)為(wei)35.5m、15.5m,空(kong)腹溢流重(zhong)力壩(ba)(ba)長86m,溢流前緣(yuan)總長55m,設(she)有開 敞式溢流壩(ba)(ba)5孔(kong),每孔(kong)寬(kuan)11m,堰(yan)頂(ding)(ding)(ding)設(she)弧形工(gong)作門和(he)平板檢(jian)修(xiu)門,分別(bie)(bie)由懸吊(diao)式液壓 啟閉機(ji)(ji)(ji)和(he)壩(ba)(ba)頂(ding)(ding)(ding)雙向(xiang)門機(ji)(ji)(ji)控(kong)制(zhi)。主(zhu)廠(chang)房為(wei)壩(ba)(ba)內式廠(chang)房,位于空(kong)腹溢流壩(ba)(ba)內,長80m,寬(kuan) 22m,高32.59m,安(an)裝3臺單機(ji)(ji)(ji)容量為(wei)2.5萬KW的水輪發(fa)電(dian)機(ji)(ji)(ji)組(zu)(zu)。
電站(zhan)工(gong)程(cheng)于1993年(nian)(nian)4月經(jing)(jing)國家計(ji)委批準立項(xiang),由(you)(you)香港(gang)中貫集團和黔江區烏江電力集團合資建(jian)(jian)設。工(gong)程(cheng)建(jian)(jian)設管(guan)理實行業主(zhu)負責制,由(you)(you)大河(he)口水(shui)(shui)電工(gong)程(cheng)指 揮(hui)部負責工(gong)程(cheng)建(jian)(jian)設管(guan)理。1992年(nian)(nian)通過議標方式(shi),由(you)(you)八(ba)局(ju)承(cheng)擔施(shi)工(gong)導(dao)流洞開(kai)挖和人工(gong)砂(sha)石(shi)系統(tong) 工(gong)程(cheng)。1993年(nian)(nian)7月主(zhu)體工(gong)程(cheng)及安裝(zhuang)工(gong)程(cheng),經(jing)(jing)評(ping)標推薦(jian),并經(jing)(jing)決標領導(dao)小(xiao)組批準確定,亦由(you)(you)八(ba)局(ju)承(cheng)建(jian)(jian),并與大河(he)口水(shui)(shui)電工(gong)程(cheng)指揮(hui)部簽定《四川省(sheng)黔江地區大河(he)口水(shui)(shui)電站(zhan) 第(di)三標主(zhu)體工(gong)程(cheng)土建(jian)(jian)及安裝(zhuang)工(gong)程(cheng)合同協(xie)議書(shu)》,由(you)(you)大河(he)口施(shi)工(gong)局(ju)負責施(shi)工(gong)。?
該工程實物工程總量:土石方開(kai)挖(wa)53萬(wan)(wan)m3、土石方回填7萬(wan)(wan)m3、混凝土35.23萬(wan)(wan)m3、 漿(jiang)砌石2.4萬(wan)(wan)m3、帷(wei)幕灌漿(jiang)43658m、固結灌漿(jiang)2256m、金(jin)屬結構制作(zuo)安裝1147.5t。199 3年(nian)11月開(kai)工,1994年(nian)1月河床截流(liu)(liu),導流(liu)(liu)洞通水,1996年(nian)12月首臺機組發(fa)電,1998年(nian)竣工。