古(gu)洞口(Ⅰ級)水利(li)水電工(gong)程位于湖北省(sheng)興山縣境內,壩(ba)址在(zai)長江(jiang)支流(liu)(liu)香溪(xi)河上游古(gu)夫河段的古(gu)洞口峽谷出口處,下距興山縣新(xin)縣城(cheng)古(gu)夫鎮(zhen)2.5公(gong)里,距縣城(cheng)高陽鎮(zhen)18.5公(gong)里,為古(gu)夫河流(liu)(liu)域水電開發的近期骨干(gan)工(gong)程。
古洞口(kou)工程泄洪兼(jian)放空洞位于大(da)壩左岸(an),圓塔式進水口(kou)的(de)(de)進口(kou)檢修閘室底(di)板(ban)高(gao)程270.0米,弧形閘門位于隧洞中部(bu),隧洞全長421米,均采用鋼(gang)筋砼(tong)襯(chen)砌(qi),上游有壓段(duan)長183米,襯(chen)厚0.6米,由兩段(duan)方圓漸變段(duan)與檢修塔和工作閘室相接。下游無(wu)壓段(duan)長175米,出口(kou)采用斜切坎挑流消(xiao)能。要(yao)求泄洪洞鋼(gang)筋砼(tong)施(shi)工必須保證質(zhi)量,滿足抗沖(chong)、抗滲功(gong)能的(de)(de)要(yao)求,做到澆筑密實、表面(mian)平(ping)整(zheng)光滑。
古洞口工(gong)程為Ⅱ等大(2)型工(gong)程,主(zhu)要(yao)由攔河(he)壩、泄洪建筑(zhu)物、引水(shui)系統(tong)、廠房及開關(guan)站組成。壩址處河(he)道峽(xia)(xia)窄,兩(liang)岸(an)巖坡陡竣,河(he)床覆蓋層較深。且(qie)河(he)道自峽(xia)(xia)谷出(chu)口處急轉(zhuan)向右,右岸(an)下(xia)游地(di)勢開闊,交通方便。根據壩址地(di)形、地(di)質特點、及樞紐布置要(yao)求(qiu),泄洪建筑(zhu)物(即溢洪道和泄洪兼放空隧洞)布置在左岸(an),引水(shui)系統(tong)及電站廠房布置在右岸(an)。
1、泄洪兼放空隧洞
泄(xie)洪(hong)兼放空(kong)隧洞位于大壩左岸,由(you)進水(shui)(shui)口、有壓段(duan)、工作閘室、無壓段(duan)及末(mo)端挑(tiao)流(liu)鼻(bi)坎組成(cheng),全長421米(mi),進水(shui)(shui)口底板(ban)高程為270米(mi),校核洪(hong)水(shui)(shui)位時最大泄(xie)量1250立方米(mi)/秒(miao)。
1987年(nian)興(xing)山(shan)縣水(shui)(shui)(shui)(shui)(shui)(shui)電(dian)局委托中南(nan)勘測設(she)(she)(she)計(ji)(ji)(ji)(ji)研究(jiu)院(yuan)宜昌分院(yuan),按照國(guo)家基本建(jian)設(she)(she)(she)程(cheng)(cheng)(cheng)序進行(xing)(xing)(xing)古(gu)夫河流(liu)域查(cha)勘及(ji)其水(shui)(shui)(shui)(shui)(shui)(shui)電(dian)開(kai)發規(gui)(gui)劃(hua)(hua),1988年(nian)上半年(nian)完(wan)成《古(gu)洞(dong)(dong)口(kou)(Ⅰ、Ⅱ級)水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)水(shui)(shui)(shui)(shui)(shui)(shui)電(dian)樞(shu)(shu)紐(niu)工(gong)(gong)程(cheng)(cheng)(cheng)可行(xing)(xing)(xing)性研究(jiu)報(bao)告(gao)(gao)(gao)》,同(tong)(tong)年(nian)12月(yue)(yue)通過湖(hu)北省(sheng)水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)廳(ting)(ting)會(hui)同(tong)(tong)省(sheng)計(ji)(ji)(ji)(ji)委工(gong)(gong)程(cheng)(cheng)(cheng)咨詢公(gong)司對(dui)(dui)(dui)"可研報(bao)告(gao)(gao)(gao)"進行(xing)(xing)(xing)了審(shen)(shen)(shen)查(cha)和評估。1989年(nian)8月(yue)(yue)9日,湖(hu)北省(sheng)計(ji)(ji)(ji)(ji)劃(hua)(hua)委員(yuan)會(hui)下(xia)達(da)了《關于興(xing)山(shan)縣古(gu)洞(dong)(dong)口(kou)水(shui)(shui)(shui)(shui)(shui)(shui)電(dian)站(zhan)項目建(jian)議書(shu)的(de)(de)批(pi)復(fu)》。1990年(nian)5月(yue)(yue)原(yuan)(yuan)能源部(bu)(bu)(bu)、水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)部(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)水(shui)(shui)(shui)(shui)(shui)(shui)電(dian)規(gui)(gui)劃(hua)(hua)設(she)(she)(she)計(ji)(ji)(ji)(ji)總(zong)(zong)(zong)院(yuan)又對(dui)(dui)(dui)該報(bao)告(gao)(gao)(gao)進行(xing)(xing)(xing)了復(fu)審(shen)(shen)(shen),同(tong)(tong)意該報(bao)告(gao)(gao)(gao)中提(ti)(ti)出(chu)(chu)的(de)(de)主要結論以(yi)工(gong)(gong)程(cheng)(cheng)(cheng)設(she)(she)(she)計(ji)(ji)(ji)(ji)方案及(ji)省(sheng)計(ji)(ji)(ji)(ji)委、水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)廳(ting)(ting)評估與審(shen)(shen)(shen)查(cha)意見。中南(nan)院(yuan)宜昌分院(yuan)于1990年(nian)10月(yue)(yue)開(kai)始進行(xing)(xing)(xing)該工(gong)(gong)程(cheng)(cheng)(cheng)的(de)(de)初(chu)步(bu)(bu)設(she)(she)(she)計(ji)(ji)(ji)(ji)工(gong)(gong)作,1991年(nian)10月(yue)(yue)提(ti)(ti)交了初(chu)步(bu)(bu)設(she)(she)(she)計(ji)(ji)(ji)(ji)報(bao)告(gao)(gao)(gao)。1991年(nian)12月(yue)(yue)12日,水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)部(bu)(bu)(bu)下(xia)達(da)了《關于湖(hu)北省(sheng)興(xing)山(shan)縣古(gu)洞(dong)(dong)口(kou)水(shui)(shui)(shui)(shui)(shui)(shui)電(dian)站(zhan)(Ⅰ級)設(she)(she)(she)計(ji)(ji)(ji)(ji)任務書(shu)的(de)(de)批(pi)復(fu)》。1992年(nian)3月(yue)(yue)通過了由原(yuan)(yuan)能源部(bu)(bu)(bu)、水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)部(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)水(shui)(shui)(shui)(shui)(shui)(shui)電(dian)規(gui)(gui)劃(hua)(hua)設(she)(she)(she)計(ji)(ji)(ji)(ji)總(zong)(zong)(zong)院(yuan)和湖(hu)北省(sheng)水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)廳(ting)(ting)聯合主持(chi)的(de)(de)審(shen)(shen)(shen)查(cha),審(shen)(shen)(shen)查(cha)同(tong)(tong)意初(chu)步(bu)(bu)設(she)(she)(she)計(ji)(ji)(ji)(ji)報(bao)告(gao)(gao)(gao)提(ti)(ti)出(chu)(chu)的(de)(de)樞(shu)(shu)紐(niu)總(zong)(zong)(zong)體布置方案。同(tong)(tong)年(nian)7月(yue)(yue)水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)部(bu)(bu)(bu)以(yi)(1992)43號(hao)文(即《關于湖(hu)北興(xing)山(shan)古(gu)洞(dong)(dong)口(kou)(Ⅰ級)水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)水(shui)(shui)(shui)(shui)(shui)(shui)電(dian)工(gong)(gong)程(cheng)(cheng)(cheng)初(chu)步(bu)(bu)設(she)(she)(she)計(ji)(ji)(ji)(ji)報(bao)告(gao)(gao)(gao)的(de)(de)批(pi)復(fu)》)批(pi)準了該工(gong)(gong)程(cheng)(cheng)(cheng)初(chu)步(bu)(bu)設(she)(she)(she)計(ji)(ji)(ji)(ji)報(bao)告(gao)(gao)(gao)。1992年(nian)12月(yue)(yue)29日湖(hu)北省(sheng)計(ji)(ji)(ji)(ji)劃(hua)(hua)委員(yuan)會(hui)下(xia)達(da)了《關于轉發省(sheng)政府(fu)批(pi)準興(xing)山(shan)縣古(gu)洞(dong)(dong)口(kou)水(shui)(shui)(shui)(shui)(shui)(shui)電(dian)站(zhan)工(gong)(gong)程(cheng)(cheng)(cheng)一(yi)九(jiu)九(jiu)二年(nian)新(xin)開(kai)工(gong)(gong)的(de)(de)建(jian)設(she)(she)(she)通知》。1994年(nian)7月(yue)(yue)根(gen)據興(xing)山(shan)工(gong)(gong)農業生產對(dui)(dui)(dui)電(dian)力的(de)(de)需(xu)要,特(te)別是縣電(dian)網對(dui)(dui)(dui)調峰容(rong)(rong)量的(de)(de)需(xu)要,提(ti)(ti)出(chu)(chu)《古(gu)洞(dong)(dong)口(kou)(Ⅰ級)水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)水(shui)(shui)(shui)(shui)(shui)(shui)電(dian)工(gong)(gong)程(cheng)(cheng)(cheng)電(dian)站(zhan)增容(rong)(rong)論證報(bao)告(gao)(gao)(gao)》。1996年(nian)11月(yue)(yue)由水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)部(bu)(bu)(bu)、水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)水(shui)(shui)(shui)(shui)(shui)(shui)電(dian)規(gui)(gui)劃(hua)(hua)設(she)(she)(she)計(ji)(ji)(ji)(ji)總(zong)(zong)(zong)院(yuan)的(de)(de)工(gong)(gong)程(cheng)(cheng)(cheng)設(she)(she)(she)計(ji)(ji)(ji)(ji)進行(xing)(xing)(xing)了復(fu)審(shen)(shen)(shen),同(tong)(tong)意電(dian)站(zhan)裝機容(rong)(rong)量36兆(zhao)瓦(wa),增至(zhi)45兆(zhao)瓦(wa),水(shui)(shui)(shui)(shui)(shui)(shui)庫(ku)大(da)壩(ba)由2000年(nian)一(yi)遇(yu)洪(hong)水(shui)(shui)(shui)(shui)(shui)(shui)校核提(ti)(ti)高到5000年(nian)一(yi)遇(yu)洪(hong)水(shui)(shui)(shui)(shui)(shui)(shui)校核。1997年(nian)3月(yue)(yue)水(shui)(shui)(shui)(shui)(shui)(shui)利(li)(li)(li)部(bu)(bu)(bu)以(yi)水(shui)(shui)(shui)(shui)(shui)(shui)規(gui)(gui)設(she)(she)(she)(1997)4號(hao)文對(dui)(dui)(dui)審(shen)(shen)(shen)核意見予(yu)以(yi)了批(pi)復(fu),并提(ti)(ti)出(chu)(chu)了明確的(de)(de)審(shen)(shen)(shen)核意見。
古洞口工(gong)程于1993年3月(yue)1日正式開工(gong),1999年9月(yue)9日首臺機組(zu)(zu)投(tou)產(chan)發電(dian)。2000年9月(yue)8日第二臺機組(zu)(zu)投(tou)產(chan)發電(dian),其中泄洪兼放空隧(sui)洞施(shi)工(gong)情況如(ru)下(xia):
泄洪洞開(kai)(kai)挖工(gong)程于(yu)1997年(nian)(nian)2月(yue)(yue)(yue)(yue)(yue)10日(ri)開(kai)(kai)工(gong),1997年(nian)(nian)6月(yue)(yue)(yue)(yue)(yue)16日(ri)全洞貫(guan)通。檢修(xiu)塔、有壓段、工(gong)作閘室段砼于(yu)1998年(nian)(nian)5月(yue)(yue)(yue)(yue)(yue)3日(ri)開(kai)(kai)工(gong),于(yu)1999年(nian)(nian)5月(yue)(yue)(yue)(yue)(yue)11日(ri)澆筑結(jie)束(shu)(shu)(shu)。事(shi)故(gu)檢修(xiu)門于(yu)1998年(nian)(nian)11月(yue)(yue)(yue)(yue)(yue)開(kai)(kai)工(gong),2000年(nian)(nian)7月(yue)(yue)(yue)(yue)(yue)安(an)裝結(jie)束(shu)(shu)(shu)。工(gong)作弧(hu)門于(yu)1998年(nian)(nian)11月(yue)(yue)(yue)(yue)(yue)30日(ri)開(kai)(kai)工(gong),1999年(nian)(nian)5月(yue)(yue)(yue)(yue)(yue)20日(ri)安(an)裝結(jie)束(shu)(shu)(shu)。無壓段砼于(yu)2003年(nian)(nian)12月(yue)(yue)(yue)(yue)(yue)1日(ri)開(kai)(kai)工(gong),2004年(nian)(nian)5月(yue)(yue)(yue)(yue)(yue)4日(ri)施(shi)(shi)工(gong)結(jie)束(shu)(shu)(shu)。挑流鼻(bi)坎段砼于(yu)2000年(nian)(nian)4月(yue)(yue)(yue)(yue)(yue)5日(ri)開(kai)(kai)倉(cang)澆筑至2000年(nian)(nian)6月(yue)(yue)(yue)(yue)(yue)3日(ri)竣工(gong)。回填、固(gu)結(jie)灌漿施(shi)(shi)工(gong)于(yu)1999年(nian)(nian)元月(yue)(yue)(yue)(yue)(yue)15日(ri)施(shi)(shi)工(gong),1999年(nian)(nian)5月(yue)(yue)(yue)(yue)(yue)12日(ri)結(jie)束(shu)(shu)(shu)。
根據(ju)中華(hua)人(ren)民共和國《防洪(hong)標準》GB50201-94規(gui)定,古(gu)洞口(kou)(Ⅰ級)水利水電工程永(yong)久(jiu)建筑物洪(hong)水標準為(wei):
混凝(ning)土(tu)面板堆石壩設計洪(hong)水(shui)重現期為100年(nian),校核洪(hong)水(shui)重現期為5000年(nian)。
廠房洪(hong)水重(zhong)現期為100年,校核洪(hong)水重(zhong)現期為200年。
混凝土(tu)面板(ban)堆石壩按1級建(jian)筑(zhu)物(wu)設計(ji),洪水標準按2級建(jian)筑(zhu)物(wu)設計(ji);
泄水(shui)建筑(zhu)物(wu)按2級建筑(zhu)物(wu)設計;
引水建筑(zhu)物(wu)及發電廠房按(an)3級建筑(zhu)物(wu)設計。
古(gu)洞(dong)口電(dian)站下距(ju)新縣城所在地(di)僅2.5公(gong)里,為(wei)了(le)(le)(le)保證(zheng)下游(you)人(ren)(ren)員(yuan)、財產的安(an)全(quan),同時也為(wei)自身建筑(zhu)物的防洪(hong)(hong)需(xu)要,歷(li)(li)年來設計(ji)單(dan)位中南勘(kan)測設計(ji)院(yuan)以文件報(bao)送了(le)(le)(le)《湖北香溪河古(gu)洞(dong)口(Ⅰ級)水利水電(dian)工(gong)(gong)程渡(du)汛(xun)意見》。按照要求,電(dian)業(ye)公(gong)司(si)每年均認真組(zu)織編織了(le)(le)(le)《古(gu)洞(dong)口水庫(ku)渡(du)汛(xun)方案的報(bao)告》,并上報(bao)各(ge)(ge)(ge)級防洪(hong)(hong)抗旱指揮(hui)部門。在接到報(bao)告批復后,按照批復文件要求認真落(luo)實人(ren)(ren)員(yuan)、機(ji)械和物資,并成立(li)了(le)(le)(le)以業(ye)主、監理(li)、各(ge)(ge)(ge)施工(gong)(gong)單(dan)位責任人(ren)(ren)和相關人(ren)(ren)員(yuan)組(zu)成的"古(gu)洞(dong)口工(gong)(gong)程防汛(xun)指揮(hui)部"。電(dian)業(ye)公(gong)司(si)成立(li)了(le)(le)(le)"防洪(hong)(hong)搶險突擊(ji)隊",各(ge)(ge)(ge)施工(gong)(gong)單(dan)位也成立(li)了(le)(le)(le)相應機(ji)構,落(luo)實了(le)(le)(le)各(ge)(ge)(ge)種措施。由于(yu)工(gong)(gong)程按渡(du)汛(xun)要求完成了(le)(le)(le)工(gong)(gong)程項目施工(gong)(gong),各(ge)(ge)(ge)方面配(pei)合緊(jin)密,歷(li)(li)年來沒有發(fa)生工(gong)(gong)程防洪(hong)(hong)渡(du)汛(xun)損失(shi)。
該(gai)工程(cheng)由省、市兩級質量監(jian)督(du)機(ji)構行使政(zheng)府監(jian)督(du)職能(neng)。