大(da)河(he)口水電站位于重(zhong)慶市酉陽縣(xian)境內(nei)(nei)阿(a)蓬江大(da)灘(tan)河(he)段,是阿(a)蓬江梯(ti)級(ji)開發(fa)的(de)第八個梯(ti)級(ji)水利樞紐工(gong)程(cheng),是流域內(nei)(nei)九(jiu)個梯(ti)級(ji)開發(fa)最 大(da)的(de)一個。壩址控制(zhi)流域面(mian)積4619km2,總庫容1.15億(yi)m3,總裝機7.5萬KW, 年發(fa)電量3.75億(yi)KW·h。是一座以發(fa)電為主,兼有(you)防(fang)洪、灌溉、養殖、旅游開發(fa)等綜合效益的(de)水電工(gong)程(cheng)。
電(dian)站樞紐工程由(you)攔河壩(ba)(ba)(ba)(ba)、發電(dian)廠房、戶內(nei)式開關站等組成(cheng)。攔河壩(ba)(ba)(ba)(ba)為(wei)混凝土(tu)空(kong)腹(fu)重(zhong)力(li)(li)壩(ba)(ba)(ba)(ba),壩(ba)(ba)(ba)(ba)頂(ding)泄洪,壩(ba)(ba)(ba)(ba)高84.5m,壩(ba)(ba)(ba)(ba)頂(ding)長(chang)393.3m。左右岸(an)非溢(yi)(yi)流(liu)重(zhong)力(li)(li)壩(ba)(ba)(ba)(ba)長(chang)分(fen)別為(wei)35.5m、15.5m,空(kong)腹(fu)溢(yi)(yi)流(liu)重(zhong)力(li)(li)壩(ba)(ba)(ba)(ba)長(chang)86m,溢(yi)(yi)流(liu)前緣總長(chang)55m,設(she)有開 敞(chang)式溢(yi)(yi)流(liu)壩(ba)(ba)(ba)(ba)5孔,每孔寬(kuan)(kuan)11m,堰頂(ding)設(she)弧(hu)形工作門(men)和平(ping)板檢(jian)修門(men),分(fen)別由(you)懸吊式液壓 啟閉機和壩(ba)(ba)(ba)(ba)頂(ding)雙向門(men)機控制。主(zhu)廠房為(wei)壩(ba)(ba)(ba)(ba)內(nei)式廠房,位于空(kong)腹(fu)溢(yi)(yi)流(liu)壩(ba)(ba)(ba)(ba)內(nei),長(chang)80m,寬(kuan)(kuan) 22m,高32.59m,安裝3臺單機容(rong)量為(wei)2.5萬(wan)KW的水(shui)輪發電(dian)機組。
電站(zhan)(zhan)工(gong)(gong)程于(yu)1993年(nian)(nian)4月經國家計委批準立項(xiang),由(you)(you)(you)香港中貫集團和(he)(he)黔江(jiang)(jiang)區烏江(jiang)(jiang)電力集團合(he)資建(jian)設。工(gong)(gong)程建(jian)設管理實行業主(zhu)負責制,由(you)(you)(you)大(da)河(he)口(kou)水(shui)電工(gong)(gong)程指 揮部(bu)負責工(gong)(gong)程建(jian)設管理。1992年(nian)(nian)通過議(yi)(yi)標(biao)方式,由(you)(you)(you)八局(ju)承擔施(shi)工(gong)(gong)導(dao)流洞開挖和(he)(he)人工(gong)(gong)砂石系統 工(gong)(gong)程。1993年(nian)(nian)7月主(zhu)體工(gong)(gong)程及(ji)安裝(zhuang)工(gong)(gong)程,經評標(biao)推(tui)薦,并經決標(biao)領導(dao)小(xiao)組批準確定,亦由(you)(you)(you)八局(ju)承建(jian),并與大(da)河(he)口(kou)水(shui)電工(gong)(gong)程指揮部(bu)簽定《四川(chuan)省黔江(jiang)(jiang)地區大(da)河(he)口(kou)水(shui)電站(zhan)(zhan) 第三標(biao)主(zhu)體工(gong)(gong)程土建(jian)及(ji)安裝(zhuang)工(gong)(gong)程合(he)同(tong)協議(yi)(yi)書》,由(you)(you)(you)大(da)河(he)口(kou)施(shi)工(gong)(gong)局(ju)負責施(shi)工(gong)(gong)。?
該(gai)工程(cheng)實物工程(cheng)總量:土石方開挖(wa)53萬m3、土石方回填(tian)7萬m3、混凝土35.23萬m3、 漿砌石2.4萬m3、帷幕灌漿43658m、固結(jie)灌漿2256m、金屬結(jie)構制作安裝1147.5t。199 3年(nian)11月(yue)開工,1994年(nian)1月(yue)河床截流(liu),導流(liu)洞通(tong)水,1996年(nian)12月(yue)首(shou)臺機組發電,1998年(nian)竣工。