工程簡介
太平(ping)哨大壩(ba)位于渾江下游,遼寧(ning)省寬甸縣(xian)境內,工(gong)程于1976年(nian)開工(gong)建(jian)設,1979年(nian)1月下閘蓄水,1980年(nian)4臺機(ji)組(zu)全部投入運行,是(shi)一(yi)座以發電(dian)(dian)為主的中型水電(dian)(dian)站,裝機(ji)容量為161.0MW(4×40.25MW),多年(nian)平(ping)均發電(dian)(dian)量4.3億(yi)kW·h。電(dian)(dian)站主要(yao)建(jian)筑物由(you)攔(lan)河壩(ba)、引水隧洞、地(di)面(mian)發電(dian)(dian)廠房、地(di)面(mian)開關站和副壩(ba)(備(bei)用溢洪道(dao))等組(zu)成。
大壩(ba)(ba)(ba)為(wei)(wei)混凝土重力(li)壩(ba)(ba)(ba),最大壩(ba)(ba)(ba)高44m,壩(ba)(ba)(ba)頂(ding)長555.6m,共36個壩(ba)(ba)(ba)段(duan)(duan),其中4至24壩(ba)(ba)(ba)段(duan)(duan)為(wei)(wei)溢流壩(ba)(ba)(ba)段(duan)(duan),每個壩(ba)(ba)(ba)段(duan)(duan)寬(kuan)12m,壩(ba)(ba)(ba)段(duan)(duan)橫縫設于孔口中間,堰頂(ding)高程181.5m,其它(ta)為(wei)(wei)擋水壩(ba)(ba)(ba)段(duan)(duan)。大壩(ba)(ba)(ba)按二級建(jian)筑物設計(ji)(ji),壩(ba)(ba)(ba)頂(ding)高程196.0m,壩(ba)(ba)(ba)頂(ding)寬(kuan)5m,在(zai)壩(ba)(ba)(ba)內176 m 高程設有一條縱(zong)向觀(guan)測廊道。太平哨水庫為(wei)(wei)日(ri)調節水庫,正常蓄水位(wei)及設計(ji)(ji)洪水位(wei)均為(wei)(wei)191.5m,校核洪水位(wei)為(wei)(wei)192.5m,水庫水位(wei)的變幅很小。
太平(ping)(ping)哨水(shui)庫(ku)是(shi)一座山(shan)谷型水(shui)庫(ku),是(shi)繼渾江(jiang)流(liu)域上桓(huan)仁及回龍山(shan)水(shui)電(dian)站(zhan)(zhan)之(zhi)后專供第三個梯級(ji)水(shui)電(dian)站(zhan)(zhan)(裝機容量4×4.025萬千瓦)發電(dian)的水(shui)庫(ku)。設計水(shui)頭36.2m,水(shui)庫(ku)總庫(ku)容為2億立方米。正常蓄水(shui)位(wei)是(shi)191.5米,水(shui)庫(ku)面積13.2平(ping)(ping)方公(gong)里(19800畝),水(shui)面最寬處達(da)1000米,最狹(xia)處100米。水(shui)庫(ku)干流(liu)蜿蜒曲折(zhe)長達(da)35公(gong)里,似一條銀蛇飛(fei)舞于群山(shan)之(zhi)間(jian),兩岸翠(cui)疊百尋,一灣平(ping)(ping)湖千公(gong)頃。
流域概況
太(tai)平(ping)哨水(shui)(shui)(shui)電(dian)站位于鴨綠江(jiang)支流渾江(jiang)下游(you),電(dian)站壩(ba)址在遼寧省寬甸縣境內,壩(ba)址以上集水(shui)(shui)(shui)面(mian)積(ji)12961平(ping)方公(gong)(gong)里(li),其上游(you)約86公(gong)(gong)里(li)和36.5公(gong)(gong)里(li)處有桓仁、回(hui)龍(long)山電(dian)站,壩(ba)址集水(shui)(shui)(shui)面(mian)積(ji)以上分別為10364平(ping)方公(gong)(gong)里(li)和12433平(ping)方公(gong)(gong)里(li),桓~回(hui)區間集水(shui)(shui)(shui)面(mian)積(ji)Z069平(ping)方公(gong)(gong)里(li)有支流大二河(he)(he)、大雅河(he)(he)匯入。回(hui)~太(tai)區間集水(shui)(shui)(shui)面(mian)積(ji)528平(ping)方公(gong)(gong)里(li),有支流小雅河(he)(he)匯入。
渾(hun)江(jiang)發源于(yu)長白山(shan)(shan)系龍崗(gang)山(shan)(shan)脈老嶺南(nan)麓。河(he)(he)流(liu)(liu)全長435公里,集水(shui)面積15414平(ping)方公里,其(qi)相鄰流(liu)(liu)域北為第二松花(hua)江(jiang)、東南(nan)為鴨綠江(jiang)、西接遼河(he)(he)支(zhi)流(liu)(liu)渾(hun)河(he)(he)、太子(zi)河(he)(he)。本(ben)流(liu)(liu)域是山(shan)(shan)區(qu)性(xing)河(he)(he)流(liu)(liu),自河(he)(he)流(liu)(liu)以(yi)下(xia),沿程匯入的支(zhi)流(liu)(liu)共有(you)11條,兩岸山(shan)(shan)勢(shi)陡(dou)峭、僅於(wu)各支(zhi)流(liu)(liu)匯入處(chu)地勢(shi)較(jiao)開闊(kuo)。河(he)(he)道中多急灘,水(shui)面比(bi)(bi)降(jiang)較(jiao)大,通化(hua)以(yi)上(shang)為上(shang)游(you),平(ping)均(jun)比(bi)(bi)降(jiang)1.55‰,通化(hua)至桓(huan)仁(ren)為中游(you)、桓(huan)仁(ren)以(yi)下(xia)為下(xia)游(you),中下(xia)游(you)平(ping)均(jun)比(bi)(bi)降(jiang)0.85‰,河(he)(he)床主(zhu)要由卵(luan)石(shi)組成。