簡介
百龍灘(tan)水(shui)電(dian)(dian)站(zhan)廠房安裝(zhuang)單機(ji)容量(liang)3.2萬(wan)(wan)kW的(de)燈泡貫流(liu)式水(shui)輪發(fa)(fa)電(dian)(dian)機(ji)6臺(tai),總裝(zhuang)機(ji)容量(liang)19.2萬(wan)(wan)kW,設計水(shui)頭9.7m,最大水(shui)頭18m,單機(ji)額定流(liu)量(liang)377.5立方米(mi)/秒。近(jin)期保(bao)證(zheng)出力(li)878萬(wan)(wan)kW,多(duo)年平(ping)均(jun)發(fa)(fa)電(dian)(dian)量(liang)9.85億kW·h;天生橋水(shui)電(dian)(dian)站(zhan)運(yun)行后(hou)保(bao)證(zheng)出力(li)12.15萬(wan)(wan)kW,多(duo)年平(ping)均(jun)發(fa)(fa)電(dian)(dian)量(liang)11.48億kW·h;龍灘(tan)、天生橋水(shui)電(dian)(dian)站(zhan)運(yun)行后(hou)保(bao)證(zheng)出力(li)15.25萬(wan)(wan)kW,多(duo)年平(ping)均(jun)發(fa)(fa)電(dian)(dian)量(liang)13.35億kW·h;11月(yue)至翌年4月(yue)枯水(shui)期發(fa)(fa)電(dian)(dian)量(liang)分(fen)別占年發(fa)(fa)電(dian)(dian)量(liang)的(de)49.3%、52.6%、52.9%,發(fa)(fa)電(dian)(dian)效益十(shi)分(fen)顯著。船(chuan)閘近(jin)期可(ke)通(tong)航(hang)250t船(chuan)隊,過壩年貨運(yun)量(liang)180萬(wan)(wan)t。
壩址控制流(liu)(liu)(liu)域(yu)面積(ji)112500平方(fang)(fang)(fang)公里。多年(nian)(nian)平均氣溫21.3℃。多年(nian)(nian)平均含(han)沙量(liang)0.815kg/立(li)方(fang)(fang)(fang)米(mi)(mi),實(shi)測最大(da)含(han)沙量(liang)14.6kg/立(li)方(fang)(fang)(fang)米(mi)(mi),年(nian)(nian)輸沙量(liang)5350萬t。多年(nian)(nian)平均降雨量(liang)1720mm。多年(nian)(nian)平均流(liu)(liu)(liu)量(liang)2020立(li)方(fang)(fang)(fang)米(mi)(mi)/秒(miao),實(shi)測最大(da)流(liu)(liu)(liu)量(liang)18700立(li)方(fang)(fang)(fang)米(mi)(mi)/秒(miao),經巖(yan)灘、大(da)化水(shui)(shui)(shui)(shui)電(dian)站調(diao)節P=95%時的(de)流(liu)(liu)(liu)量(liang)為521立(li)方(fang)(fang)(fang)米(mi)(mi)/秒(miao),天生橋、龍灘水(shui)(shui)(shui)(shui)電(dian)站建成運行后P=95%時的(de)調(diao)節流(liu)(liu)(liu)量(liang)為1202立(li)方(fang)(fang)(fang)米(mi)(mi)/秒(miao)。水(shui)(shui)(shui)(shui)庫(ku)總庫(ku)容(rong)3.4億(yi)立(li)方(fang)(fang)(fang)米(mi)(mi),正常蓄(xu)水(shui)(shui)(shui)(shui)位(wei)126m,相(xiang)應(ying)庫(ku)容(rong)0.695億(yi)立(li)方(fang)(fang)(fang)米(mi)(mi);死水(shui)(shui)(shui)(shui)位(wei)125m,相(xiang)應(ying)庫(ku)容(rong)0.648億(yi)立(li)方(fang)(fang)(fang)米(mi)(mi)。百龍灘是一座低水(shui)(shui)(shui)(shui)頭河床式(shi)徑流(liu)(liu)(liu)水(shui)(shui)(shui)(shui)電(dian)站,需對大(da)化水(shui)(shui)(shui)(shui)電(dian)站日調(diao)節流(liu)(liu)(liu)量(liang)進行適當的(de)反調(diao)節。
水庫淹沒耕地(di)1000畝(mu),淹遷(qian)84人(ren)。
地形
壩址為低山(shan)丘陵地(di)形(xing),河(he)谷(gu)寬闊,河(he)床中(zhong)有3座(zuo)小山(shan),漫(man)灘基巖裸露,河(he)床覆(fu)蓋(gai)層(ceng)(ceng)(ceng)(ceng)0~2.38m,地(di)層(ceng)(ceng)(ceng)(ceng)巖性為中(zhong)薄(bo)層(ceng)(ceng)(ceng)(ceng)含粉(fen)沙、鈣質(zhi)泥巖夾灰巖,白云質(zhi)灰巖和(he)白云質(zhi)泥灰巖互層(ceng)(ceng)(ceng)(ceng),層(ceng)(ceng)(ceng)(ceng)面(mian)走(zou)向(xiang)與河(he)流夾角70°~80°,傾向(xiang)上游30°~45°,斷層(ceng)(ceng)(ceng)(ceng)計(ji)有23條,破碎(sui)帶(dai)寬度(du)0.03~1.0m,較(jiao)大斷層(ceng)(ceng)(ceng)(ceng)有F9、F10、F12。緩傾角斷裂不發育(yu)。地(di)震基本(ben)烈度(du)為6度(du),設(she)計(ji)建筑物地(di)震不設(she)防。
建筑
樞紐(niu)按(an)三等工程(cheng)設計(ji)(ji),永久建筑物(wu)(wu)為3級(ji)建筑物(wu)(wu),按(an)50年一(yi)遇(yu)設計(ji)(ji)洪水(shui)流量23400立(li)(li)方米(mi)/秒(miao),上游(you)水(shui)位(wei)(wei)(wei)153.9m,下游(you)水(shui)位(wei)(wei)(wei)153.4m;500年一(yi)遇(yu)校(xiao)核洪水(shui)29600立(li)(li)方米(mi)/秒(miao),上游(you)水(shui)位(wei)(wei)(wei)159.2m,下游(you)水(shui)位(wei)(wei)(wei)158.7m。樞紐(niu)由(you)混(hun)凝土重力式溢流壩、河床式廠房、開關站、船閘、沖沙閘、接頭壩組成(cheng)。
碾(nian)壓混凝(ning)土(tu)溢流壩布(bu)置于左岸(an)主河道(dao)上(shang),為開敞式自由(you)泄(xie)流,總長274m,最大壩高(gao)28m。堰頂高(gao)程126m、130m,長度都為100m;碾(nian)壓混凝(ning)土(tu)接頭壩頂高(gao)程135m,長74m。右岸(an)土(tu)壩接頭頂高(gao)程160.1m,長210m。
發電廠(chang)房布置(zhi)于(yu)右(you)岸灘地上,其尺寸為112m×69.5m×72.1(長×寬×高(gao)(gao)),廠(chang)頂及橋面(mian)高(gao)(gao)程(cheng)160.1m,安裝場(chang)及發電機(ji)層高(gao)(gao)程(cheng)為120m,安裝高(gao)(gao)程(cheng)101.9m,底板(ban)開(kai)(kai)挖高(gao)(gao)程(cheng)88m。廠(chang)房兩側各設4m×8m(寬×高(gao)(gao))沖(chong)沙孔(kong)1個,進水口高(gao)(gao)程(cheng)93m。開(kai)(kai)關站布置(zhi)于(yu)右(you)岸壩(ba)軸(zhou)線下游,220kV出(chu)線3回(hui)(hui),110kV出(chu)線1回(hui)(hui)。
單級集中式輸水(shui)船閘(zha)(zha)(zha)(zha)布置在(zai)右(you)岸灘地(di)岸邊,總長(chang)(chang)1099.8m,通(tong)航流(liu)(liu)量3500立方米/秒。上游引(yin)航道、閘(zha)(zha)(zha)(zha)首(shou)、閘(zha)(zha)(zha)(zha)室(shi)按2×500t駁船隊(dui)遠景通(tong)航尺寸(cun)要求設(she)計(ji),下游引(yin)航道按2×250t駁船隊(dui)尺寸(cun)要求設(she)計(ji),閘(zha)(zha)(zha)(zha)室(shi)有效尺寸(cun)為(wei)120m×12m×2.5m(長(chang)(chang)×寬(kuan)(kuan)×吃水(shui)深(shen))。上游引(yin)航道長(chang)(chang)454.4m,底寬(kuan)(kuan)37m,底高(gao)(gao)程(cheng)(cheng)122.5m。上閘(zha)(zha)(zha)(zha)首(shou)28m×26m×53.1m(寬(kuan)(kuan)×長(chang)(chang)×高(gao)(gao)),工(gong)作(zuo)門底坎(kan)122.5m,一期(qi)工(gong)程(cheng)(cheng)施工(gong)至109m高(gao)(gao)程(cheng)(cheng),作(zuo)為(wei)部(bu)分二(er)期(qi)導流(liu)(liu)、初期(qi)電站(zhan)降低(di)水(shui)位運(yun)行(xing)的流(liu)(liu)道。閘(zha)(zha)(zha)(zha)室(shi)長(chang)(chang)128m,底板高(gao)(gao)程(cheng)(cheng)110.8m。下閘(zha)(zha)(zha)(zha)首(shou)30m×29m×54.1m(寬(kuan)(kuan)×長(chang)(chang)×高(gao)(gao))。下游引(yin)航道長(chang)(chang)462.4m,底寬(kuan)(kuan)32m,底高(gao)(gao)程(cheng)(cheng)110.8m。船閘(zha)(zha)(zha)(zha)右(you)側設(she)凈寬(kuan)(kuan)10m沖沙閘(zha)(zha)(zha)(zha)1個(ge),底高(gao)(gao)程(cheng)(cheng)113.5m。船閘(zha)(zha)(zha)(zha)上閘(zha)(zha)(zha)(zha)首(shou)以下,除(chu)部(bu)分開挖(wa)外均(jun)在(zai)二(er)期(qi)工(gong)程(cheng)(cheng)施工(gong)。
主體工程量
主體(ti)工(gong)(gong)程(cheng)(cheng)量(包括(kuo)導流(liu)工(gong)(gong)程(cheng)(cheng)):土方(fang)(fang)(fang)開(kai)挖62.89萬(wan)立(li)(li)(li)方(fang)(fang)(fang)米(mi)(mi),石(shi)方(fang)(fang)(fang)開(kai)挖241.36萬(wan)立(li)(li)(li)方(fang)(fang)(fang)米(mi)(mi)(其中(zhong)(zhong)(zhong)一(yi)期(qi)(qi)工(gong)(gong)程(cheng)(cheng)為(wei)(wei)202.65萬(wan)立(li)(li)(li)方(fang)(fang)(fang)米(mi)(mi)),混凝土68.32萬(wan)立(li)(li)(li)方(fang)(fang)(fang)米(mi)(mi)(其中(zhong)(zhong)(zhong)一(yi)期(qi)(qi)工(gong)(gong)程(cheng)(cheng)為(wei)(wei)60.29萬(wan)立(li)(li)(li)方(fang)(fang)(fang)米(mi)(mi)),土石(shi)方(fang)(fang)(fang)填筑135.19萬(wan)立(li)(li)(li)方(fang)(fang)(fang)米(mi)(mi)(其中(zhong)(zhong)(zhong)一(yi)期(qi)(qi)工(gong)(gong)程(cheng)(cheng)為(wei)(wei)125.37萬(wan)立(li)(li)(li)方(fang)(fang)(fang)米(mi)(mi)),鋼(gang)筋18897t(其中(zhong)(zhong)(zhong)一(yi)期(qi)(qi)為(wei)(wei)17667t),鋼(gang)材(cai)8577t(其中(zhong)(zhong)(zhong)一(yi)期(qi)(qi)為(wei)(wei)7548t),帷幕灌漿4753m。施工(gong)(gong)對外交通為(wei)(wei)公(gong)路(lu)運輸。砂石(shi)料(liao)為(wei)(wei)灰巖機制人工(gong)(gong)砂石(shi)料(liao)。
總投資
該工(gong)(gong)程審(shen)定修正總投資(zi)(按1992年(nian)價格水平(ping))為(wei)(wei)16.44億(yi)元(yuan)(一期工(gong)(gong)程為(wei)(wei)14.18億(yi)元(yuan)),其(qi)中(zhong)靜態(tai)(tai)投資(zi)10.43億(yi)元(yuan)(一期工(gong)(gong)程為(wei)(wei)9.72億(yi)元(yuan))。送出(chu)工(gong)(gong)程靜態(tai)(tai)投資(zi)1497萬元(yuan)。工(gong)(gong)程由廣西桂(gui)冠電力(li)股份有限(xian)公司集資(zi)建設。勘(kan)測(ce)、設計及(ji)監理工(gong)(gong)作由廣西電力(li)工(gong)(gong)業勘(kan)察設計院(yuan)承擔(dan)。工(gong)(gong)程施(shi)(shi)工(gong)(gong)由廣西水電工(gong)(gong)程局承包。工(gong)(gong)程施(shi)(shi)工(gong)(gong)于1993年(nian)2月(yue)(yue)18日進場(chang),設計計劃(hua)總工(gong)(gong)期4年(nian)8個月(yue)(yue)(包括準(zhun)備工(gong)(gong)期),第一臺機組發電工(gong)(gong)期3年(nian)。