概況
大洪河(he)水電站位(wei)于(yu)重慶市長壽區境內大洪河(he)支流東(dong)河(he)上,壩址以(yi)上河(he)段長89Km。距長壽區城區約45km。壩址以(yi)上控(kong)制流域(yu)面積(ji)1317km2,多(duo)年平均徑(jing)流量約6.81億m3,多(duo)年平均流量21.6m3/s。壩址基(ji)巖為砂(sha)質粘(zhan)土巖和砂(sha)巖互(hu)(hu)層(ceng),壩基(ji)地層(ceng)為砂(sha)質粘(zhan)土巖,兩岸壩肩為砂(sha)質粘(zhan)土巖和砂(sha)巖互(hu)(hu)層(ceng)。地震基(ji)本烈度為6度,不設防。
本工程(cheng)以發電為(wei)(wei)主,兼(jian)有(you)防洪(hong)(hong)(hong)、灌溉、養殖等(deng)綜合效益。水(shui)(shui)庫(ku)(ku)總庫(ku)(ku)容(rong)3.43億(yi)m3,屬不完全(quan)年(nian)(nian)(nian)調節水(shui)(shui)庫(ku)(ku)。水(shui)(shui)庫(ku)(ku)正常蓄水(shui)(shui)位294.00m,死水(shui)(shui)位285.00m,設(she)計洪(hong)(hong)(hong)水(shui)(shui)位295.42m, 校核水(shui)(shui)位297.83m,前汛(xun)限水(shui)(shui)位290.00m。電站(zhan)裝(zhuang)機5臺,總裝(zhuang)機容(rong)量(liang)45MW(4×8.75+10),多年(nian)(nian)(nian)平均(jun)發電量(liang)1.123億(yi)KW·h。水(shui)(shui)電站(zhan)樞紐由攔(lan)河壩(ba)、6座(zuo)副壩(ba)、左(zuo)(zuo)、右溢(yi)洪(hong)(hong)(hong)道(dao)、放(fang)空洞、引水(shui)(shui)系(xi)統及(ji)發電廠房等(deng)組成(cheng)。攔(lan)河壩(ba)為(wei)(wei)多種土質壩(ba),壩(ba)頂高(gao)(gao)程(cheng)298.65m,最(zui)大(da)壩(ba)高(gao)(gao)36.50m,壩(ba)頂長189.10m。泄洪(hong)(hong)(hong)建(jian)筑(zhu)(zhu)物(wu)主要參數,最(zui)大(da)下(xia)泄流量(liang)(右岸(an),正常溢(yi)洪(hong)(hong)(hong)道(dao))1400m3/s ;(左(zuo)(zuo)岸(an),非(fei)常溢(yi)洪(hong)(hong)(hong)道(dao))916m3/s,閘門(men)型式(shi)、尺寸:右岸(an),18×8.5m(寬(kuan)×高(gao)(gao)),弧(hu)形鋼(gang)(gang)閘門(men)1扇;左(zuo)(zuo)岸(an),12×7.0m(寬(kuan)×高(gao)(gao)),弧(hu)形鋼(gang)(gang)閘門(men)2扇。本工程(cheng)為(wei)(wei)二等(deng)(大(da)(2)型)工程(cheng),大(da)壩(ba)等(deng)主要建(jian)筑(zhu)(zhu)物(wu)為(wei)(wei)2級建(jian)筑(zhu)(zhu)物(wu),設(she)計洪(hong)(hong)(hong)水(shui)(shui)重(zhong)現(xian)(xian)期(qi)(qi)100年(nian)(nian)(nian)、校核洪(hong)(hong)(hong)水(shui)(shui)重(zhong)現(xian)(xian)期(qi)(qi)為(wei)(wei)2000年(nian)(nian)(nian)。電站(zhan)廠房為(wei)(wei)地面式(shi),為(wei)(wei)3級建(jian)筑(zhu)(zhu)物(wu),設(she)計洪(hong)(hong)(hong)水(shui)(shui)重(zhong)現(xian)(xian)期(qi)(qi)為(wei)(wei)100年(nian)(nian)(nian),校核洪(hong)(hong)(hong)水(shui)(shui)重(zhong)現(xian)(xian)期(qi)(qi)為(wei)(wei)200年(nian)(nian)(nian)。
本工程由成都勘測設(she)計(ji)院設(she)計(ji),大洪河水力發(fa)電(dian)(dian)工程處施(shi)工,于1958年(nian)8月開工,1959年(nian)11月下閘蓄(xu)水,1960年(nian)7月首臺(tai)機組并網發(fa)電(dian)(dian),1964年(nian)10月四(si)臺(tai)機組全部投產,2000年(nian)擴機一臺(tai)(五號(hao)機)。大洪河大壩(ba)運行單(dan)位重慶中電(dian)(dian)獅子(zi)灘(tan)發(fa)電(dian)(dian)有(you)限(xian)公司,主(zhu)管單(dan)位重慶九(jiu)龍電(dian)(dian)力股份有(you)限(xian)公司。
大洪河簡介
大(da)(da)(da)洪河(he)(he)(he)為(wei)長江北(bei)岸的一條小支(zhi)(zhi)流(liu)(liu),位于重(zhong)慶(qing)東(dong)部丘(qiu)陵區,于發源(yuan)華鎣山南麓,源(yuan)頭(tou)分(fen)東(dong)西(xi)(xi)(xi)兩支(zhi)(zhi),以(yi)(yi)白龍(long)(long)洞(dong)山為(wei)分(fen)水嶺,西(xi)(xi)(xi)支(zhi)(zhi)名(ming)為(wei)御臨(lin)(lin)河(he)(he)(he)(或西(xi)(xi)(xi)河(he)(he)(he)),東(dong)支(zhi)(zhi)名(ming)為(wei)大(da)(da)(da)洪河(he)(he)(he),原名(ming)東(dong)河(he)(he)(he),兩河(he)(he)(he)并(bing)行向(xiang)西(xi)(xi)(xi)南流(liu)(liu)至(zhi)渝北(bei)區江口匯合后亦稱御臨(lin)(lin)河(he)(he)(he)。大(da)(da)(da)洪河(he)(he)(he)發源(yuan)于四川(chuan)省大(da)(da)(da)竹(zhu)縣雙溪鄉(xiang),流(liu)(liu)經大(da)(da)(da)竹(zhu)、鄰(lin)水、長壽(shou)、渝北(bei)區境(jing),在渝北(bei)區江口注(zhu)入御臨(lin)(lin)河(he)(he)(he),該河(he)(he)(he)長175公里,流(liu)(liu)域(yu)面(mian)積1356.4平(ping)方公里。大(da)(da)(da)洪河(he)(he)(he)流(liu)(liu)域(yu)形(xing)狀近似長方形(xing),地屬(shu)深(shen)丘(qiu)和(he)(he)淺丘(qiu)區,河(he)(he)(he)源(yuan)及兩岸山坡多(duo)(duo)為(wei)森林(lin)和(he)(he)雜草灌木叢(cong),植被良好。流(liu)(liu)域(yu)地勢東(dong)北(bei)高西(xi)(xi)(xi)南低,東(dong)部與龍(long)(long)溪河(he)(he)(he)相接(jie),西(xi)(xi)(xi)部與嘉陵江支(zhi)(zhi)流(liu)(liu)渠江相鄰(lin),平(ping)均(jun)海拔高程為(wei)530米。龍(long)(long)門(men)灘以(yi)(yi)上河(he)(he)(he)谷開闊、落差較小;龍(long)(long)門(men)灘以(yi)(yi)下(xia)河(he)(he)(he)谷狹(xia)深(shen),多(duo)(duo)險灘瀑(pu)布,其中(zhong)龍(long)(long)門(men)灘至(zhi)青煙洞(dong)河(he)(he)(he)段(duan)長約(yue)5公里,集中(zhong)落差達70米,且為(wei)一河(he)(he)(he)曲,大(da)(da)(da)洪河(he)(he)(he)水電站即利(li)用這一集中(zhong)落差修建而成。
工程概況
壩址以上河長約89公里(li)(li),控制(zhi)流(liu)域(yu)面積(ji)1317平(ping)(ping)方公里(li)(li),占(zhan)東河流(liu)域(yu)面積(ji)95.4%。水庫(ku)(ku)正常蓄水位(wei)(wei)294.00米(mi)(mi)(農(nong)業限(xian)(xian)制(zhi)水位(wei)(wei)292.00米(mi)(mi)),死水位(wei)(wei)285.00米(mi)(mi),防洪限(xian)(xian)制(zhi)水位(wei)(wei)290.80米(mi)(mi)(前汛期(qi))和292.00米(mi)(mi)(后汛期(qi)),校(xiao)核洪水位(wei)(wei)297.80米(mi)(mi)(p=0.05%),設計洪水位(wei)(wei)295.40米(mi)(mi)(p=1%),水庫(ku)(ku)總庫(ku)(ku)容3.43億立方米(mi)(mi),為大二型水庫(ku)(ku),具(ju)有年(nian)(nian)(nian)(nian)調節性能(neng)。大洪河流(liu)域(yu)河川徑流(liu)均(jun)(jun)主要由降雨形成,壩址以上多年(nian)(nian)(nian)(nian)平(ping)(ping)均(jun)(jun)年(nian)(nian)(nian)(nian)降水量(liang)分(fen)別為為1171.4毫米(mi)(mi)。大洪河水庫(ku)(ku)壩址多年(nian)(nian)(nian)(nian)平(ping)(ping)均(jun)(jun)流(liu)量(liang)為21.9立方米(mi)(mi)/秒,折合(he)年(nian)(nian)(nian)(nian)徑流(liu)量(liang)6.91億立方米(mi)(mi),徑流(liu)深524.8毫米(mi)(mi),年(nian)(nian)(nian)(nian)平(ping)(ping)均(jun)(jun)徑流(liu)模數(shu)0.45。