概況
大洪河水電站位于重慶市長(chang)壽(shou)區境內(nei)大洪河支流東河上,壩(ba)(ba)址(zhi)以上河段長(chang)89Km。距(ju)長(chang)壽(shou)區城區約45km。壩(ba)(ba)址(zhi)以上控制(zhi)流域(yu)面積1317km2,多(duo)年平(ping)(ping)均(jun)徑流量(liang)(liang)約6.81億(yi)m3,多(duo)年平(ping)(ping)均(jun)流量(liang)(liang)21.6m3/s。壩(ba)(ba)址(zhi)基(ji)(ji)巖為(wei)砂(sha)質(zhi)粘(zhan)(zhan)土(tu)巖和砂(sha)巖互(hu)層(ceng)(ceng),壩(ba)(ba)基(ji)(ji)地層(ceng)(ceng)為(wei)砂(sha)質(zhi)粘(zhan)(zhan)土(tu)巖,兩(liang)岸壩(ba)(ba)肩為(wei)砂(sha)質(zhi)粘(zhan)(zhan)土(tu)巖和砂(sha)巖互(hu)層(ceng)(ceng)。地震基(ji)(ji)本烈度(du)為(wei)6度(du),不設(she)防。
本工(gong)(gong)程(cheng)(cheng)以發電(dian)為主(zhu),兼(jian)有防洪(hong)、灌溉、養殖等綜合效益。水(shui)(shui)(shui)(shui)庫(ku)總庫(ku)容(rong)(rong)3.43億m3,屬不完全年(nian)調節水(shui)(shui)(shui)(shui)庫(ku)。水(shui)(shui)(shui)(shui)庫(ku)正常蓄(xu)水(shui)(shui)(shui)(shui)位294.00m,死水(shui)(shui)(shui)(shui)位285.00m,設(she)計洪(hong)水(shui)(shui)(shui)(shui)位295.42m, 校核水(shui)(shui)(shui)(shui)位297.83m,前汛(xun)限水(shui)(shui)(shui)(shui)位290.00m。電(dian)站裝機5臺,總裝機容(rong)(rong)量45MW(4×8.75+10),多(duo)年(nian)平均發電(dian)量1.123億KW·h。水(shui)(shui)(shui)(shui)電(dian)站樞紐由攔河壩(ba)(ba)、6座副壩(ba)(ba)、左、右溢洪(hong)道、放空(kong)洞、引水(shui)(shui)(shui)(shui)系統及(ji)發電(dian)廠房等組成。攔河壩(ba)(ba)為多(duo)種土(tu)質壩(ba)(ba),壩(ba)(ba)頂(ding)高(gao)程(cheng)(cheng)298.65m,最(zui)大壩(ba)(ba)高(gao)36.50m,壩(ba)(ba)頂(ding)長(chang)189.10m。泄(xie)洪(hong)建(jian)筑(zhu)物(wu)主(zhu)要參數,最(zui)大下泄(xie)流量(右岸,正常溢洪(hong)道)1400m3/s ;(左岸,非常溢洪(hong)道)916m3/s,閘門型式、尺寸(cun):右岸,18×8.5m(寬×高(gao)),弧形鋼閘門1扇;左岸,12×7.0m(寬×高(gao)),弧形鋼閘門2扇。本工(gong)(gong)程(cheng)(cheng)為二等(大(2)型)工(gong)(gong)程(cheng)(cheng),大壩(ba)(ba)等主(zhu)要建(jian)筑(zhu)物(wu)為2級建(jian)筑(zhu)物(wu),設(she)計洪(hong)水(shui)(shui)(shui)(shui)重(zhong)(zhong)現(xian)期100年(nian)、校核洪(hong)水(shui)(shui)(shui)(shui)重(zhong)(zhong)現(xian)期為2000年(nian)。電(dian)站廠房為地面式,為3級建(jian)筑(zhu)物(wu),設(she)計洪(hong)水(shui)(shui)(shui)(shui)重(zhong)(zhong)現(xian)期為100年(nian),校核洪(hong)水(shui)(shui)(shui)(shui)重(zhong)(zhong)現(xian)期為200年(nian)。
本工程(cheng)由成(cheng)都勘測設(she)計院設(she)計,大(da)洪(hong)河(he)水(shui)力發電(dian)(dian)工程(cheng)處施工,于(yu)1958年8月開工,1959年11月下(xia)閘蓄水(shui),1960年7月首臺(tai)(tai)機(ji)(ji)組并網發電(dian)(dian),1964年10月四臺(tai)(tai)機(ji)(ji)組全部(bu)投產,2000年擴機(ji)(ji)一臺(tai)(tai)(五號機(ji)(ji))。大(da)洪(hong)河(he)大(da)壩(ba)運(yun)行單位重(zhong)(zhong)慶(qing)中電(dian)(dian)獅子灘發電(dian)(dian)有限公(gong)司(si),主管(guan)單位重(zhong)(zhong)慶(qing)九龍(long)電(dian)(dian)力股份有限公(gong)司(si)。
大洪河簡介
大(da)(da)(da)(da)洪(hong)河(he)為(wei)(wei)長(chang)江(jiang)北(bei)岸(an)(an)的一(yi)(yi)條小支(zhi)流(liu),位于重慶(qing)東(dong)部(bu)丘(qiu)(qiu)陵區(qu),于發源(yuan)華鎣(ying)山(shan)(shan)南(nan)(nan)麓,源(yuan)頭分(fen)東(dong)西(xi)兩支(zhi),以白龍(long)洞山(shan)(shan)為(wei)(wei)分(fen)水嶺,西(xi)支(zhi)名為(wei)(wei)御臨(lin)河(he)(或西(xi)河(he)),東(dong)支(zhi)名為(wei)(wei)大(da)(da)(da)(da)洪(hong)河(he),原名東(dong)河(he),兩河(he)并行向西(xi)南(nan)(nan)流(liu)至渝(yu)北(bei)區(qu)江(jiang)口匯合后亦稱(cheng)御臨(lin)河(he)。大(da)(da)(da)(da)洪(hong)河(he)發源(yuan)于四川省大(da)(da)(da)(da)竹(zhu)縣(xian)雙溪鄉,流(liu)經大(da)(da)(da)(da)竹(zhu)、鄰水、長(chang)壽、渝(yu)北(bei)區(qu)境,在渝(yu)北(bei)區(qu)江(jiang)口注入御臨(lin)河(he),該河(he)長(chang)175公里(li),流(liu)域(yu)面(mian)積1356.4平(ping)方(fang)公里(li)。大(da)(da)(da)(da)洪(hong)河(he)流(liu)域(yu)形(xing)狀近(jin)似長(chang)方(fang)形(xing),地(di)屬深(shen)丘(qiu)(qiu)和淺(qian)丘(qiu)(qiu)區(qu),河(he)源(yuan)及兩岸(an)(an)山(shan)(shan)坡(po)多(duo)為(wei)(wei)森(sen)林和雜草(cao)灌木叢,植被(bei)良好。流(liu)域(yu)地(di)勢東(dong)北(bei)高西(xi)南(nan)(nan)低,東(dong)部(bu)與(yu)(yu)龍(long)溪河(he)相接,西(xi)部(bu)與(yu)(yu)嘉陵江(jiang)支(zhi)流(liu)渠江(jiang)相鄰,平(ping)均海拔高程為(wei)(wei)530米。龍(long)門(men)灘以上河(he)谷開闊(kuo)、落差較小;龍(long)門(men)灘以下河(he)谷狹深(shen),多(duo)險(xian)灘瀑布,其中龍(long)門(men)灘至青煙洞河(he)段長(chang)約5公里(li),集(ji)中落差達70米,且(qie)為(wei)(wei)一(yi)(yi)河(he)曲(qu),大(da)(da)(da)(da)洪(hong)河(he)水電站即(ji)利用這(zhe)一(yi)(yi)集(ji)中落差修建而成。
工程概況
壩址以(yi)上河(he)長約89公(gong)里(li),控(kong)制(zhi)流(liu)(liu)(liu)域面積1317平(ping)方(fang)公(gong)里(li),占東河(he)流(liu)(liu)(liu)域面積95.4%。水(shui)(shui)庫(ku)正常蓄水(shui)(shui)位(wei)294.00米(mi)(農業限(xian)制(zhi)水(shui)(shui)位(wei)292.00米(mi)),死水(shui)(shui)位(wei)285.00米(mi),防洪(hong)(hong)(hong)限(xian)制(zhi)水(shui)(shui)位(wei)290.80米(mi)(前汛期(qi))和292.00米(mi)(后汛期(qi)),校核洪(hong)(hong)(hong)水(shui)(shui)位(wei)297.80米(mi)(p=0.05%),設計洪(hong)(hong)(hong)水(shui)(shui)位(wei)295.40米(mi)(p=1%),水(shui)(shui)庫(ku)總庫(ku)容3.43億立方(fang)米(mi),為(wei)大(da)二(er)型水(shui)(shui)庫(ku),具有年(nian)調節性能。大(da)洪(hong)(hong)(hong)河(he)流(liu)(liu)(liu)域河(he)川徑(jing)流(liu)(liu)(liu)均(jun)主要(yao)由降(jiang)雨形成(cheng),壩址以(yi)上多年(nian)平(ping)均(jun)年(nian)降(jiang)水(shui)(shui)量分(fen)別為(wei)為(wei)1171.4毫米(mi)。大(da)洪(hong)(hong)(hong)河(he)水(shui)(shui)庫(ku)壩址多年(nian)平(ping)均(jun)流(liu)(liu)(liu)量為(wei)21.9立方(fang)米(mi)/秒(miao),折(zhe)合年(nian)徑(jing)流(liu)(liu)(liu)量6.91億立方(fang)米(mi),徑(jing)流(liu)(liu)(liu)深524.8毫米(mi),年(nian)平(ping)均(jun)徑(jing)流(liu)(liu)(liu)模數0.45。