簡介
百龍(long)灘水(shui)電(dian)站(zhan)廠房安裝單機(ji)容(rong)量(liang)(liang)(liang)(liang)(liang)3.2萬kW的燈泡貫流式水(shui)輪發(fa)(fa)電(dian)機(ji)6臺,總裝機(ji)容(rong)量(liang)(liang)(liang)(liang)(liang)19.2萬kW,設計水(shui)頭9.7m,最大水(shui)頭18m,單機(ji)額(e)定流量(liang)(liang)(liang)(liang)(liang)377.5立方米/秒。近(jin)(jin)期(qi)保(bao)(bao)證出(chu)力(li)878萬kW,多(duo)(duo)年(nian)平(ping)(ping)均(jun)發(fa)(fa)電(dian)量(liang)(liang)(liang)(liang)(liang)9.85億kW·h;天生(sheng)橋水(shui)電(dian)站(zhan)運行后保(bao)(bao)證出(chu)力(li)12.15萬kW,多(duo)(duo)年(nian)平(ping)(ping)均(jun)發(fa)(fa)電(dian)量(liang)(liang)(liang)(liang)(liang)11.48億kW·h;龍(long)灘、天生(sheng)橋水(shui)電(dian)站(zhan)運行后保(bao)(bao)證出(chu)力(li)15.25萬kW,多(duo)(duo)年(nian)平(ping)(ping)均(jun)發(fa)(fa)電(dian)量(liang)(liang)(liang)(liang)(liang)13.35億kW·h;11月至翌年(nian)4月枯水(shui)期(qi)發(fa)(fa)電(dian)量(liang)(liang)(liang)(liang)(liang)分別占年(nian)發(fa)(fa)電(dian)量(liang)(liang)(liang)(liang)(liang)的49.3%、52.6%、52.9%,發(fa)(fa)電(dian)效(xiao)益十分顯(xian)著(zhu)。船(chuan)閘(zha)近(jin)(jin)期(qi)可(ke)通航250t船(chuan)隊,過壩年(nian)貨(huo)運量(liang)(liang)(liang)(liang)(liang)180萬t。
壩址控制流(liu)域面積112500平方(fang)(fang)(fang)(fang)公(gong)里(li)。多(duo)(duo)年平均(jun)(jun)氣溫21.3℃。多(duo)(duo)年平均(jun)(jun)含沙量(liang)(liang)0.815kg/立方(fang)(fang)(fang)(fang)米(mi),實測(ce)最大含沙量(liang)(liang)14.6kg/立方(fang)(fang)(fang)(fang)米(mi),年輸(shu)沙量(liang)(liang)5350萬t。多(duo)(duo)年平均(jun)(jun)降雨量(liang)(liang)1720mm。多(duo)(duo)年平均(jun)(jun)流(liu)量(liang)(liang)2020立方(fang)(fang)(fang)(fang)米(mi)/秒(miao),實測(ce)最大流(liu)量(liang)(liang)18700立方(fang)(fang)(fang)(fang)米(mi)/秒(miao),經巖(yan)灘(tan)、大化(hua)水(shui)(shui)電站調(diao)節(jie)P=95%時的流(liu)量(liang)(liang)為521立方(fang)(fang)(fang)(fang)米(mi)/秒(miao),天生橋(qiao)、龍灘(tan)水(shui)(shui)電站建成運(yun)行(xing)后(hou)P=95%時的調(diao)節(jie)流(liu)量(liang)(liang)為1202立方(fang)(fang)(fang)(fang)米(mi)/秒(miao)。水(shui)(shui)庫總庫容(rong)3.4億立方(fang)(fang)(fang)(fang)米(mi),正常蓄水(shui)(shui)位126m,相應庫容(rong)0.695億立方(fang)(fang)(fang)(fang)米(mi);死(si)水(shui)(shui)位125m,相應庫容(rong)0.648億立方(fang)(fang)(fang)(fang)米(mi)。百龍灘(tan)是一座低水(shui)(shui)頭(tou)河床式徑流(liu)水(shui)(shui)電站,需對大化(hua)水(shui)(shui)電站日調(diao)節(jie)流(liu)量(liang)(liang)進行(xing)適當的反調(diao)節(jie)。
水庫(ku)淹沒耕地(di)1000畝,淹遷84人。
地形
壩址(zhi)為(wei)低山丘陵地(di)形(xing),河(he)(he)谷(gu)寬(kuan)(kuan)闊,河(he)(he)床中(zhong)有(you)3座小山,漫灘基巖(yan)(yan)裸露,河(he)(he)床覆蓋層0~2.38m,地(di)層巖(yan)(yan)性為(wei)中(zhong)薄層含粉沙、鈣質(zhi)泥巖(yan)(yan)夾灰巖(yan)(yan),白(bai)云(yun)質(zhi)灰巖(yan)(yan)和白(bai)云(yun)質(zhi)泥灰巖(yan)(yan)互層,層面走向與河(he)(he)流(liu)夾角(jiao)70°~80°,傾(qing)向上游30°~45°,斷層計(ji)有(you)23條,破碎帶(dai)寬(kuan)(kuan)度(du)0.03~1.0m,較大斷層有(you)F9、F10、F12。緩傾(qing)角(jiao)斷裂不發育(yu)。地(di)震基本烈度(du)為(wei)6度(du),設計(ji)建(jian)筑物(wu)地(di)震不設防。
建筑
樞紐按三等工程設計(ji),永久建(jian)筑物(wu)為3級建(jian)筑物(wu),按50年(nian)一遇(yu)設計(ji)洪水(shui)流(liu)(liu)量23400立(li)方(fang)米(mi)/秒,上(shang)游(you)(you)(you)水(shui)位(wei)153.9m,下游(you)(you)(you)水(shui)位(wei)153.4m;500年(nian)一遇(yu)校(xiao)核洪水(shui)29600立(li)方(fang)米(mi)/秒,上(shang)游(you)(you)(you)水(shui)位(wei)159.2m,下游(you)(you)(you)水(shui)位(wei)158.7m。樞紐由混(hun)凝土重力(li)式溢流(liu)(liu)壩、河床式廠房、開關站、船閘(zha)(zha)、沖(chong)沙閘(zha)(zha)、接頭壩組成。
碾壓混凝土(tu)(tu)溢流(liu)壩(ba)布置于左岸(an)主河(he)道上,為開敞式自由泄流(liu),總(zong)長274m,最大(da)壩(ba)高(gao)(gao)28m。堰頂高(gao)(gao)程(cheng)126m、130m,長度都為100m;碾壓混凝土(tu)(tu)接頭壩(ba)頂高(gao)(gao)程(cheng)135m,長74m。右岸(an)土(tu)(tu)壩(ba)接頭頂高(gao)(gao)程(cheng)160.1m,長210m。
發電廠(chang)房(fang)布置于(yu)右岸灘地上,其尺寸為112m×69.5m×72.1(長×寬×高(gao)),廠(chang)頂及(ji)橋面高(gao)程(cheng)160.1m,安(an)裝(zhuang)場及(ji)發電機層高(gao)程(cheng)為120m,安(an)裝(zhuang)高(gao)程(cheng)101.9m,底板開(kai)挖(wa)高(gao)程(cheng)88m。廠(chang)房(fang)兩側各設(she)4m×8m(寬×高(gao))沖沙孔1個,進水口高(gao)程(cheng)93m。開(kai)關站(zhan)布置于(yu)右岸壩軸(zhou)線下游,220kV出(chu)(chu)線3回(hui)(hui),110kV出(chu)(chu)線1回(hui)(hui)。
單級(ji)集(ji)中式輸水船閘(zha)布置在右岸(an)灘地(di)岸(an)邊,總長(chang)(chang)1099.8m,通(tong)航(hang)(hang)流量3500立方米(mi)/秒。上游(you)引(yin)航(hang)(hang)道(dao)(dao)、閘(zha)首(shou)(shou)、閘(zha)室(shi)(shi)按(an)2×500t駁船隊(dui)(dui)遠景(jing)通(tong)航(hang)(hang)尺(chi)(chi)寸要(yao)求設(she)(she)計,下(xia)游(you)引(yin)航(hang)(hang)道(dao)(dao)按(an)2×250t駁船隊(dui)(dui)尺(chi)(chi)寸要(yao)求設(she)(she)計,閘(zha)室(shi)(shi)有效尺(chi)(chi)寸為120m×12m×2.5m(長(chang)(chang)×寬×吃水深(shen))。上游(you)引(yin)航(hang)(hang)道(dao)(dao)長(chang)(chang)454.4m,底(di)(di)(di)寬37m,底(di)(di)(di)高(gao)程(cheng)(cheng)(cheng)122.5m。上閘(zha)首(shou)(shou)28m×26m×53.1m(寬×長(chang)(chang)×高(gao)),工(gong)作(zuo)門底(di)(di)(di)坎122.5m,一期工(gong)程(cheng)(cheng)(cheng)施(shi)工(gong)至109m高(gao)程(cheng)(cheng)(cheng),作(zuo)為部分二期導(dao)流、初期電站降低水位(wei)運行的流道(dao)(dao)。閘(zha)室(shi)(shi)長(chang)(chang)128m,底(di)(di)(di)板高(gao)程(cheng)(cheng)(cheng)110.8m。下(xia)閘(zha)首(shou)(shou)30m×29m×54.1m(寬×長(chang)(chang)×高(gao))。下(xia)游(you)引(yin)航(hang)(hang)道(dao)(dao)長(chang)(chang)462.4m,底(di)(di)(di)寬32m,底(di)(di)(di)高(gao)程(cheng)(cheng)(cheng)110.8m。船閘(zha)右側設(she)(she)凈寬10m沖(chong)沙閘(zha)1個,底(di)(di)(di)高(gao)程(cheng)(cheng)(cheng)113.5m。船閘(zha)上閘(zha)首(shou)(shou)以(yi)下(xia),除部分開挖外均(jun)在二期工(gong)程(cheng)(cheng)(cheng)施(shi)工(gong)。
主體工程量
主體(ti)工(gong)程(cheng)(cheng)量(包括導流(liu)工(gong)程(cheng)(cheng)):土(tu)方開挖62.89萬(wan)(wan)(wan)立(li)方米(mi)(mi),石(shi)(shi)方開挖241.36萬(wan)(wan)(wan)立(li)方米(mi)(mi)(其(qi)中(zhong)(zhong)一期(qi)工(gong)程(cheng)(cheng)為(wei)(wei)202.65萬(wan)(wan)(wan)立(li)方米(mi)(mi)),混凝土(tu)68.32萬(wan)(wan)(wan)立(li)方米(mi)(mi)(其(qi)中(zhong)(zhong)一期(qi)工(gong)程(cheng)(cheng)為(wei)(wei)60.29萬(wan)(wan)(wan)立(li)方米(mi)(mi)),土(tu)石(shi)(shi)方填(tian)筑135.19萬(wan)(wan)(wan)立(li)方米(mi)(mi)(其(qi)中(zhong)(zhong)一期(qi)工(gong)程(cheng)(cheng)為(wei)(wei)125.37萬(wan)(wan)(wan)立(li)方米(mi)(mi)),鋼(gang)筋18897t(其(qi)中(zhong)(zhong)一期(qi)為(wei)(wei)17667t),鋼(gang)材8577t(其(qi)中(zhong)(zhong)一期(qi)為(wei)(wei)7548t),帷幕灌漿4753m。施(shi)工(gong)對外交通為(wei)(wei)公路運輸。砂(sha)石(shi)(shi)料為(wei)(wei)灰巖機制人工(gong)砂(sha)石(shi)(shi)料。
總投資
該工(gong)程(cheng)(cheng)審(shen)定修正總投資(zi)(按(an)1992年價格水(shui)平)為16.44億(yi)元(yuan)(一(yi)期工(gong)程(cheng)(cheng)為14.18億(yi)元(yuan)),其中(zhong)靜態(tai)投資(zi)10.43億(yi)元(yuan)(一(yi)期工(gong)程(cheng)(cheng)為9.72億(yi)元(yuan))。送出工(gong)程(cheng)(cheng)靜態(tai)投資(zi)1497萬元(yuan)。工(gong)程(cheng)(cheng)由廣西(xi)桂冠電力(li)股份有限公司集(ji)資(zi)建(jian)設(she)(she)。勘(kan)(kan)測、設(she)(she)計(ji)及監(jian)理工(gong)作由廣西(xi)電力(li)工(gong)業勘(kan)(kan)察設(she)(she)計(ji)院(yuan)承擔。工(gong)程(cheng)(cheng)施工(gong)由廣西(xi)水(shui)電工(gong)程(cheng)(cheng)局承包。工(gong)程(cheng)(cheng)施工(gong)于1993年2月18日進場,設(she)(she)計(ji)計(ji)劃總工(gong)期4年8個月(包括準備工(gong)期),第一(yi)臺機(ji)組發電工(gong)期3年。