簡介
百龍(long)灘水(shui)電(dian)(dian)(dian)站廠房(fang)安裝(zhuang)單機(ji)(ji)容(rong)量3.2萬(wan)(wan)kW的燈泡貫流式水(shui)輪(lun)發電(dian)(dian)(dian)機(ji)(ji)6臺(tai),總(zong)裝(zhuang)機(ji)(ji)容(rong)量19.2萬(wan)(wan)kW,設計(ji)水(shui)頭9.7m,最大水(shui)頭18m,單機(ji)(ji)額定流量377.5立(li)方(fang)米(mi)/秒(miao)。近(jin)期保證(zheng)出(chu)力878萬(wan)(wan)kW,多年(nian)(nian)平均(jun)發電(dian)(dian)(dian)量9.85億(yi)(yi)kW·h;天生(sheng)橋水(shui)電(dian)(dian)(dian)站運行后(hou)保證(zheng)出(chu)力12.15萬(wan)(wan)kW,多年(nian)(nian)平均(jun)發電(dian)(dian)(dian)量11.48億(yi)(yi)kW·h;龍(long)灘、天生(sheng)橋水(shui)電(dian)(dian)(dian)站運行后(hou)保證(zheng)出(chu)力15.25萬(wan)(wan)kW,多年(nian)(nian)平均(jun)發電(dian)(dian)(dian)量13.35億(yi)(yi)kW·h;11月至翌年(nian)(nian)4月枯水(shui)期發電(dian)(dian)(dian)量分別(bie)占年(nian)(nian)發電(dian)(dian)(dian)量的49.3%、52.6%、52.9%,發電(dian)(dian)(dian)效(xiao)益十分顯著。船閘近(jin)期可(ke)通(tong)航250t船隊,過壩(ba)年(nian)(nian)貨運量180萬(wan)(wan)t。
壩址控制流(liu)(liu)域面積112500平(ping)方公里。多(duo)(duo)年(nian)(nian)(nian)平(ping)均氣(qi)溫21.3℃。多(duo)(duo)年(nian)(nian)(nian)平(ping)均含沙(sha)量(liang)0.815kg/立(li)方米(mi),實測(ce)最大含沙(sha)量(liang)14.6kg/立(li)方米(mi),年(nian)(nian)(nian)輸沙(sha)量(liang)5350萬t。多(duo)(duo)年(nian)(nian)(nian)平(ping)均降雨量(liang)1720mm。多(duo)(duo)年(nian)(nian)(nian)平(ping)均流(liu)(liu)量(liang)2020立(li)方米(mi)/秒(miao),實測(ce)最大流(liu)(liu)量(liang)18700立(li)方米(mi)/秒(miao),經巖灘、大化水(shui)(shui)電(dian)站調(diao)(diao)節P=95%時的流(liu)(liu)量(liang)為521立(li)方米(mi)/秒(miao),天(tian)生(sheng)橋(qiao)、龍(long)灘水(shui)(shui)電(dian)站建成運行(xing)后P=95%時的調(diao)(diao)節流(liu)(liu)量(liang)為1202立(li)方米(mi)/秒(miao)。水(shui)(shui)庫(ku)總庫(ku)容(rong)3.4億立(li)方米(mi),正(zheng)常蓄水(shui)(shui)位126m,相(xiang)(xiang)應(ying)庫(ku)容(rong)0.695億立(li)方米(mi);死水(shui)(shui)位125m,相(xiang)(xiang)應(ying)庫(ku)容(rong)0.648億立(li)方米(mi)。百龍(long)灘是一座低(di)水(shui)(shui)頭河床式徑流(liu)(liu)水(shui)(shui)電(dian)站,需(xu)對大化水(shui)(shui)電(dian)站日調(diao)(diao)節流(liu)(liu)量(liang)進行(xing)適當的反(fan)調(diao)(diao)節。
水庫(ku)淹沒耕地1000畝(mu),淹遷84人。
地形
壩址為低山丘陵地(di)(di)形,河谷(gu)寬闊,河床中(zhong)有3座小(xiao)山,漫灘基巖(yan)裸(luo)露(lu),河床覆蓋層(ceng)(ceng)(ceng)(ceng)0~2.38m,地(di)(di)層(ceng)(ceng)(ceng)(ceng)巖(yan)性為中(zhong)薄(bo)層(ceng)(ceng)(ceng)(ceng)含粉沙、鈣質(zhi)泥巖(yan)夾灰巖(yan),白(bai)云(yun)質(zhi)灰巖(yan)和白(bai)云(yun)質(zhi)泥灰巖(yan)互(hu)層(ceng)(ceng)(ceng)(ceng),層(ceng)(ceng)(ceng)(ceng)面走向與河流(liu)夾角(jiao)70°~80°,傾向上游30°~45°,斷層(ceng)(ceng)(ceng)(ceng)計有23條,破碎帶寬度0.03~1.0m,較大(da)斷層(ceng)(ceng)(ceng)(ceng)有F9、F10、F12。緩傾角(jiao)斷裂不發(fa)育。地(di)(di)震基本烈度為6度,設(she)計建筑物地(di)(di)震不設(she)防。
建筑
樞紐(niu)按三等工程設計,永久建(jian)筑(zhu)物為3級建(jian)筑(zhu)物,按50年(nian)一(yi)遇設計洪(hong)水(shui)(shui)流(liu)量23400立方米/秒(miao),上(shang)游(you)(you)水(shui)(shui)位(wei)153.9m,下游(you)(you)水(shui)(shui)位(wei)153.4m;500年(nian)一(yi)遇校核(he)洪(hong)水(shui)(shui)29600立方米/秒(miao),上(shang)游(you)(you)水(shui)(shui)位(wei)159.2m,下游(you)(you)水(shui)(shui)位(wei)158.7m。樞紐(niu)由(you)混凝(ning)土(tu)重力式溢流(liu)壩(ba)、河床式廠(chang)房、開關(guan)站、船閘(zha)、沖沙閘(zha)、接頭壩(ba)組(zu)成。
碾(nian)壓(ya)混凝(ning)土(tu)溢流壩(ba)布(bu)置于(yu)左(zuo)岸主河道上,為開敞(chang)式(shi)自(zi)由泄(xie)流,總(zong)長274m,最(zui)大(da)壩(ba)高(gao)(gao)28m。堰頂高(gao)(gao)程126m、130m,長度(du)都為100m;碾(nian)壓(ya)混凝(ning)土(tu)接頭(tou)壩(ba)頂高(gao)(gao)程135m,長74m。右岸土(tu)壩(ba)接頭(tou)頂高(gao)(gao)程160.1m,長210m。
發電廠(chang)(chang)房布置于(yu)右岸(an)灘(tan)地上,其尺寸為112m×69.5m×72.1(長×寬×高(gao)),廠(chang)(chang)頂及橋面高(gao)程160.1m,安(an)裝場及發電機層高(gao)程為120m,安(an)裝高(gao)程101.9m,底板(ban)開挖高(gao)程88m。廠(chang)(chang)房兩側(ce)各(ge)設4m×8m(寬×高(gao))沖沙孔1個,進水(shui)口高(gao)程93m。開關站布置于(yu)右岸(an)壩軸線下(xia)游,220kV出線3回(hui),110kV出線1回(hui)。
單(dan)級集(ji)中(zhong)式輸(shu)水(shui)船(chuan)閘(zha)布(bu)置(zhi)在右(you)岸灘(tan)地岸邊,總長(chang)1099.8m,通(tong)航流(liu)量3500立方米/秒。上游引航道、閘(zha)首(shou)、閘(zha)室(shi)按2×500t駁船(chuan)隊遠(yuan)景(jing)通(tong)航尺寸要(yao)求設計(ji),下(xia)游引航道按2×250t駁船(chuan)隊尺寸要(yao)求設計(ji),閘(zha)室(shi)有效尺寸為120m×12m×2.5m(長(chang)×寬×吃水(shui)深)。上游引航道長(chang)454.4m,底寬37m,底高(gao)程(cheng)122.5m。上閘(zha)首(shou)28m×26m×53.1m(寬×長(chang)×高(gao)),工(gong)作(zuo)門底坎122.5m,一期(qi)工(gong)程(cheng)施工(gong)至(zhi)109m高(gao)程(cheng),作(zuo)為部分二期(qi)導流(liu)、初(chu)期(qi)電站降(jiang)低水(shui)位運行的流(liu)道。閘(zha)室(shi)長(chang)128m,底板(ban)高(gao)程(cheng)110.8m。下(xia)閘(zha)首(shou)30m×29m×54.1m(寬×長(chang)×高(gao))。下(xia)游引航道長(chang)462.4m,底寬32m,底高(gao)程(cheng)110.8m。船(chuan)閘(zha)右(you)側設凈寬10m沖沙閘(zha)1個,底高(gao)程(cheng)113.5m。船(chuan)閘(zha)上閘(zha)首(shou)以下(xia),除(chu)部分開挖(wa)外(wai)均在二期(qi)工(gong)程(cheng)施工(gong)。
主體工程量
主體工(gong)程(cheng)量(包括導流工(gong)程(cheng)):土方開挖(wa)62.89萬(wan)(wan)立方米(mi)(mi),石方開挖(wa)241.36萬(wan)(wan)立方米(mi)(mi)(其(qi)(qi)中(zhong)一期工(gong)程(cheng)為202.65萬(wan)(wan)立方米(mi)(mi)),混凝土68.32萬(wan)(wan)立方米(mi)(mi)(其(qi)(qi)中(zhong)一期工(gong)程(cheng)為60.29萬(wan)(wan)立方米(mi)(mi)),土石方填筑135.19萬(wan)(wan)立方米(mi)(mi)(其(qi)(qi)中(zhong)一期工(gong)程(cheng)為125.37萬(wan)(wan)立方米(mi)(mi)),鋼筋(jin)18897t(其(qi)(qi)中(zhong)一期為17667t),鋼材8577t(其(qi)(qi)中(zhong)一期為7548t),帷(wei)幕灌(guan)漿4753m。施工(gong)對外交通為公路運輸。砂(sha)石料(liao)為灰巖機制人工(gong)砂(sha)石料(liao)。
總投資
該工(gong)(gong)程(cheng)(cheng)審定(ding)修正總投(tou)資(zi)(按1992年價格水平)為16.44億元(yuan)(一期(qi)(qi)工(gong)(gong)程(cheng)(cheng)為14.18億元(yuan)),其中靜(jing)態投(tou)資(zi)10.43億元(yuan)(一期(qi)(qi)工(gong)(gong)程(cheng)(cheng)為9.72億元(yuan))。送出工(gong)(gong)程(cheng)(cheng)靜(jing)態投(tou)資(zi)1497萬元(yuan)。工(gong)(gong)程(cheng)(cheng)由(you)廣(guang)西(xi)桂冠(guan)電力(li)股份有(you)限公司集資(zi)建設(she)(she)。勘測(ce)、設(she)(she)計(ji)(ji)(ji)及監理工(gong)(gong)作由(you)廣(guang)西(xi)電力(li)工(gong)(gong)業勘察設(she)(she)計(ji)(ji)(ji)院承(cheng)擔。工(gong)(gong)程(cheng)(cheng)施(shi)工(gong)(gong)由(you)廣(guang)西(xi)水電工(gong)(gong)程(cheng)(cheng)局承(cheng)包。工(gong)(gong)程(cheng)(cheng)施(shi)工(gong)(gong)于1993年2月18日進場(chang),設(she)(she)計(ji)(ji)(ji)計(ji)(ji)(ji)劃總工(gong)(gong)期(qi)(qi)4年8個月(包括準備工(gong)(gong)期(qi)(qi)),第一臺機組發電工(gong)(gong)期(qi)(qi)3年。