大(da)河(he)口(kou)水電(dian)站位于重慶市酉陽縣境(jing)內(nei)阿蓬江大(da)灘河(he)段,是阿蓬江梯級開(kai)發的(de)第(di)八個梯級水利樞(shu)紐工(gong)程,是流域內(nei)九個梯級開(kai)發最 大(da)的(de)一個。壩(ba)址控制(zhi)流域面(mian)積4619km2,總(zong)(zong)庫容(rong)1.15億m3,總(zong)(zong)裝(zhuang)機7.5萬KW, 年發電(dian)量3.75億KW·h。是一座以(yi)發電(dian)為主,兼有防洪、灌溉、養殖(zhi)、旅游開(kai)發等綜合(he)效益(yi)的(de)水電(dian)工(gong)程。
電站(zhan)樞紐工(gong)程由(you)攔河壩(ba)(ba)(ba)、發電廠房、戶(hu)內式(shi)(shi)開關站(zhan)等組成。攔河壩(ba)(ba)(ba)為混凝(ning)土空(kong)腹重力壩(ba)(ba)(ba),壩(ba)(ba)(ba)頂(ding)泄洪,壩(ba)(ba)(ba)高(gao)84.5m,壩(ba)(ba)(ba)頂(ding)長393.3m。左(zuo)右(you)岸(an)非溢流(liu)(liu)重力壩(ba)(ba)(ba)長分別(bie)為35.5m、15.5m,空(kong)腹溢流(liu)(liu)重力壩(ba)(ba)(ba)長86m,溢流(liu)(liu)前緣總長55m,設有開 敞(chang)式(shi)(shi)溢流(liu)(liu)壩(ba)(ba)(ba)5孔,每孔寬11m,堰頂(ding)設弧形(xing)工(gong)作(zuo)門和(he)平(ping)板檢修門,分別(bie)由(you)懸(xuan)吊式(shi)(shi)液壓 啟閉機和(he)壩(ba)(ba)(ba)頂(ding)雙(shuang)向門機控制。主(zhu)廠房為壩(ba)(ba)(ba)內式(shi)(shi)廠房,位于(yu)空(kong)腹溢流(liu)(liu)壩(ba)(ba)(ba)內,長80m,寬 22m,高(gao)32.59m,安裝3臺單機容(rong)量為2.5萬KW的(de)水(shui)輪發電機組。
電(dian)站工(gong)程(cheng)(cheng)于1993年(nian)4月經(jing)(jing)國家計委(wei)批準立項,由(you)香港中貫(guan)集(ji)團(tuan)(tuan)和(he)黔江區(qu)烏江電(dian)力集(ji)團(tuan)(tuan)合資建(jian)設(she)(she)。工(gong)程(cheng)(cheng)建(jian)設(she)(she)管理(li)實(shi)行業主(zhu)負(fu)責制,由(you)大(da)(da)河口水電(dian)工(gong)程(cheng)(cheng)指 揮(hui)(hui)部負(fu)責工(gong)程(cheng)(cheng)建(jian)設(she)(she)管理(li)。1992年(nian)通過議標方式,由(you)八(ba)局(ju)承擔(dan)施工(gong)導(dao)流洞開挖和(he)人(ren)工(gong)砂石系(xi)統(tong) 工(gong)程(cheng)(cheng)。1993年(nian)7月主(zhu)體(ti)(ti)工(gong)程(cheng)(cheng)及(ji)安裝工(gong)程(cheng)(cheng),經(jing)(jing)評標推薦(jian),并(bing)經(jing)(jing)決標領導(dao)小(xiao)組批準確定,亦由(you)八(ba)局(ju)承建(jian),并(bing)與(yu)大(da)(da)河口水電(dian)工(gong)程(cheng)(cheng)指揮(hui)(hui)部簽定《四川省黔江地(di)區(qu)大(da)(da)河口水電(dian)站 第(di)三標主(zhu)體(ti)(ti)工(gong)程(cheng)(cheng)土建(jian)及(ji)安裝工(gong)程(cheng)(cheng)合同(tong)協議書》,由(you)大(da)(da)河口施工(gong)局(ju)負(fu)責施工(gong)。?
該工(gong)(gong)程實物工(gong)(gong)程總量:土石(shi)方開(kai)挖53萬(wan)m3、土石(shi)方回填(tian)7萬(wan)m3、混(hun)凝土35.23萬(wan)m3、 漿(jiang)砌石(shi)2.4萬(wan)m3、帷幕灌漿(jiang)43658m、固(gu)結灌漿(jiang)2256m、金屬結構制作安裝(zhuang)1147.5t。199 3年(nian)11月開(kai)工(gong)(gong),1994年(nian)1月河床截流(liu),導(dao)流(liu)洞(dong)通(tong)水,1996年(nian)12月首(shou)臺機組發電(dian),1998年(nian)竣工(gong)(gong)。