介紹
水庫(ku)位于區域構(gou)造相對穩定的地區,區內出露的地層主要有(you)下(xia)元古(gu)界(jie)的混合花(hua)崗(gang)巖(yan)(yan)(yan)、混合巖(yan)(yan)(yan)及角(jiao)閃(shan)斜長片麻(ma)巖(yan)(yan)(yan)等(deng)(deng),侵(qin)入巖(yan)(yan)(yan)主要有(you)元古(gu)界(jie)的混合花(hua)崗(gang)巖(yan)(yan)(yan)、花(hua)崗(gang)閃(shan)長巖(yan)(yan)(yan)等(deng)(deng)。區內構(gou)造斷裂(lie)以南(nan)北(bei)(bei)向斷裂(lie)為主,規模較大,其(qi)次為北(bei)(bei)東向、東西(xi)向及北(bei)(bei)西(xi)向斷裂(lie)。區域性的牡丹(dan)江(jiang)斷裂(lie)通過(guo)壩址(zhi)左岸埡口,向南(nan)伸入庫(ku)區,向北(bei)(bei)延至下(xia)游,但(dan)無現(xian)代活動跡象。經遼寧省(sheng)地震局鑒定,基本地震烈度為6度。
庫(ku)(ku)(ku)區兩岸山勢高(gao)峻(jun),無(wu)相鄰河(he)谷及單薄分(fen)水(shui)嶺(ling)。構(gou)成(cheng)庫(ku)(ku)(ku)區的巖石(shi)主(zhu)要為(wei)弱透水(shui)的花崗巖或混合(he)花崗巖,且地下水(shui)位較高(gao),無(wu)永久性滲漏問題。壩區河(he)谷為(wei)一(yi)不(bu)對稱的U型谷,平水(shui)期江水(shui)面寬約155m。右(you)岸為(wei)凹岸,因受河(he)流(liu)強烈沖(chong)刷,沿江形(xing)成(cheng)基(ji)巖裸露的陡壁,比高(gao)達90~180m。左岸為(wei)凸岸,分(fen)布有漫灘和Ⅰ、Ⅱ級階(jie)地,壩頭處(chu)為(wei)一(yi)近東西向的條形(xing)山脊。壩頭后(hou)部山脊由(you)于(yu)F1大斷層(ceng)通過(guo),巖石(shi)風(feng)化(hua)破碎,構(gou)成(cheng)一(yi)低矮的埡(wu)口,埡(wu)口左側(ce)山體逐漸(jian)升高(gao)加厚(hou)。水(shui)庫(ku)(ku)(ku)正常蓄水(shui)位218m,水(shui)庫(ku)(ku)(ku)回水(shui)長度(du)99.9km,淹(yan)沒范圍涉及2個縣2個鄉,總計(ji)淹(yan)沒耕地10.94萬畝,需遷移人口40725人。
電(dian)站屬一(yi)等(deng)工程,樞紐由攔河壩(ba)(ba)(包括大(da)壩(ba)(ba)和二壩(ba)(ba))、溢洪道和引水發電(dian)系統等(deng)組(zu)成。大(da)壩(ba)(ba)為(wei)鋼(gang)筋混凝土面板堆石壩(ba)(ba),下(xia)游在(zai)高程200m設一(yi)寬3m的(de)馬道,在(zai)高程173m有一(yi)寬10m的(de)進(jin)廠公路(lu)。
堆石(shi)(shi)壩(ba)體從上游(you)到下(xia)游(you)分(fen)為(wei)墊(dian)層區(qu)(qu)(qu)、細堆石(shi)(shi)過渡區(qu)(qu)(qu)、主堆石(shi)(shi)區(qu)(qu)(qu)及下(xia)游(you)堆石(shi)(shi)區(qu)(qu)(qu),在(zai)周邊(bian)縫(feng)下(xia)設(she)填筑(zhu)小區(qu)(qu)(qu),另外在(zai)面板上游(you)側下(xia)部設(she)粘土(tu)鋪蓋及保護(hu)區(qu)(qu)(qu)。趾(zhi)板最(zui)大寬度6m,厚0.6m,趾(zhi)板和面板之間(jian)設(she)置周邊(bian)縫(feng)。通過趾(zhi)板進行灌漿。帷(wei)幕(mu)灌漿為(wei)一排(pai)孔(kong)(kong)布置,最(zui)大深(shen)度約25m,固結灌漿于(yu)帷(wei)幕(mu)孔(kong)(kong)上下(xia)游(you)各(ge)一排(pai),孔(kong)(kong)深(shen)一般為(wei)6m。壩(ba)址(zhi)地(di)處寒冷山區(qu)(qu)(qu),多年平均氣(qi)溫3.2℃,極(ji)(ji)端(duan)最(zui)低氣(qi)溫是—45.2℃,極(ji)(ji)端(duan)最(zui)高氣(qi)溫37.5℃。
二壩為(wei)粘土心(xin)(xin)墻(qiang)砂礫石(shi)壩,布置在(zai)(zai)左岸(an)低矮埡口處,心(xin)(xin)墻(qiang)建(jian)基于呈塊狀的(de)全(quan)風化巖(yan)下部,通(tong)過心(xin)(xin)墻(qiang)底(di)板進行灌(guan)漿,向右(you)與大(da)壩帷幕相接,向左壩肩(jian)延長約120m,另外在(zai)(zai)F1大(da)斷層(ceng)破碎帶加強(qiang)灌(guan)漿。溢(yi)洪(hong)道位于右(you)岸(an)低分水嶺處,為(wei)開敞式岸(an)坡溢(yi)洪(hong)道,由引水渠、溢(yi)流堰(yan)體、泄槽、挑流鼻(bi)坎及出水渠組成。
該工程采用一次斷流(liu)、隧(sui)洞導(dao)(dao)流(liu)方案,導(dao)(dao)流(liu)洞進、出(chu)口及廠房(fang)圍(wei)堰(yan)為(wei)(wei)粘土(tu)心墻土(tu)石圍(wei)堰(yan),大壩上游圍(wei)堰(yan)為(wei)(wei)粘土(tu)斜(xie)墻土(tu)石圍(wei)堰(yan),按10年(nian)(nian)一遇洪水(shui)設計,2條導(dao)(dao)流(liu)洞為(wei)(wei)直徑13.7m的(de)(de)圓形斷面。第一年(nian)(nian)先填(tian)筑導(dao)(dao)流(liu)隧(sui)洞進、出(chu)口及廠房(fang)圍(wei)堰(yan),江水(shui)從束窄的(de)(de)河(he)床(chuang)過(guo)流(liu),第三年(nian)(nian)汛(xun)末主(zhu)河(he)床(chuang)截(jie)流(liu),江水(shui)由兩條導(dao)(dao)流(liu)隧(sui)洞宣泄,第五年(nian)(nian)下閘蓄水(shui),工程總工期67個月。
蓮(lian)花水(shui)電站是中國目前在寒冷地(di)區修建的(de)一座混(hun)凝(ning)土面板堆石壩,每年施(shi)工(gong)期不(bu)(bu)足7個月(yue)。冬季石料開采(cai)或制(zhi)備不(bu)(bu)停工(gong),需解(jie)決(jue)負溫下不(bu)(bu)灑水(shui)的(de)壩體填筑質量控制(zhi)問題。
總工(gong)程量為土石(shi)方開(kai)挖(wa)624.48萬(wan)m3,土石(shi)方填筑(zhu)590萬(wan)m3,混(hun)凝土澆筑(zhu)49.69萬(wan)m3。工(gong)程總投(tou)資19.5億。淹(yan)沒(mei)耕地1295.5hm2,遷移人口40725人。
工程設計
大(da)(da)壩(ba)(ba)(ba)(ba)位(wei)于(yu)(yu)主河床,壩(ba)(ba)(ba)(ba)型為混(hun)(hun)凝土(tu)面板堆(dui)石壩(ba)(ba)(ba)(ba),最(zui)大(da)(da)壩(ba)(ba)(ba)(ba)高(gao)71sm,壩(ba)(ba)(ba)(ba)頂(ding)長(chang)度(du)(du)902om,壩(ba)(ba)(ba)(ba)頂(ding)寬度(du)(du)8om,面板總(zong)面積75400 mZ,大(da)(da)壩(ba)(ba)(ba)(ba)上下游(you)邊坡1:1.4。壩(ba)(ba)(ba)(ba)基(ji)礎鋪有2om厚的(de)排水層.壩(ba)(ba)(ba)(ba)體填筑(zhu)(zhu)390萬(wan)m3。筑(zhu)(zhu)壩(ba)(ba)(ba)(ba) 堆(dui)石料為混(hun)(hun)合花崗巖,其強風(feng)化下部(bu)至徽新巖體的(de)濕 抗壓(ya)強度(du)(du)為51.0-150 MPa。周(zhou)邊縫設3道(dao)(dao)止水,勃土(tu)心墻堆(dui)石壩(ba)(ba)(ba)(ba)最(zui)大(da)(da)壩(ba)(ba)(ba)(ba)高(gao)47Zm,壩(ba)(ba)(ba)(ba)頂(ding)長(chang)度(du)(du)332m,壩(ba)(ba)(ba)(ba)頂(ding)寬 8om,上下游(you)壩(ba)(ba)(ba)(ba)坡均為l,2.0、1:2.25,薪(xin)土(tu)心墻頂(ding)寬4Om,上下游(you)坡比1:0.2,貓(mao)土(tu)心墻的(de)土(tu)料為左(zuo)岸(an)的(de)貓(mao)土(tu)和(he)粉(fen)質貓(mao)土(tu),滲透(tou)系數1.7xlo’scm/S、設計(ji)干密度(du)(du)1.62kg/cm。壩(ba)(ba)(ba)(ba)殼(ke)料為溢(yi)洪(hong)道(dao)(dao)開挖強風(feng)化 混(hun)(hun)合花崗巖和(he)部(bu)分砂(sha)礫(li)石料。開敞式溢(yi)洪(hong)道(dao)(dao)位(wei)于(yu)(yu)右岸(an)的(de)山體婭口處,溢(yi)流前沿 總(zong)長(chang)度(du)(du)130m,溢(yi)洪(hong)道(dao)(dao)由溢(yi)流堰、泄(xie)槽(cao)和(he)挑流棄(qi)坎(kan)組 成,全長(chang)990m。溢(yi)洪(hong)道(dao)(dao)最(zui)大(da)(da)泄(xie)量18570 m3/s,共7孔設有16 mX13.4m弧形工作門和(he)平(ping)板檢(jian)修門。
引(yin)水(shui)發電(dian)系統(tong)位于右(you)岸(an)(an),采用引(yin)水(shui)隧(sui)洞(dong)(dong)接地面(mian)廠(chang)房布置型式(shi)。引(yin)水(shui)隧(sui)洞(dong)(dong)進(jin)口位于右(you)岸(an)(an)大(da)壩上(shang)游200m的陡崖處。兩條引(yin)水(shui)隧(sui)洞(dong)(dong)均采用岸(an)(an)塔式(shi)進(jin)水(shui)口,進(jin)水(shui)塔高62sm,進(jin)水(shui)口前沿設(she)有(you)4扇(shan)6mx33m活動攔污柵,每個進(jin)水(shui)口設(she)計(ji)流(liu)量662 m3/s,設(she)有(you)兩扇(shan)6m沐14 m平(ping)板檢修門及(ji)固定式(shi)卷揚(yang)啟(qi)閉機。兩條引(yin)水(shui)隧(sui)洞(dong)(dong)均為圓型鋼筋混凝土(tu)襯砌斷(duan)面(mian),隧(sui)洞(dong)(dong)埋(mai)深70一160m,內徑13.7m,1號和2號引(yin)水(shui)隧(sui)洞(dong)(dong)分別長620.54m和493.98m。
引水隧洞末(mo)端均設有一座(zuo)阻抗式調(diao)壓(ya)井。調(diao)壓(ya)井高(gao)94.02m,橫(heng)斷面(mian)為(wei)復(fu)式雙圓弧型(xing)。4條壓(ya)力(li)管(guan)(guan)道從井后接出(chu),壓(ya)力(li)管(guan)(guan)道直徑為(wei)8.4m,每條長140m,壓(ya)力(li)管(guan)(guan)道埋(mai)深(shen)一般為(wei)50-80m,采 用鋼板襯砌(qi)。
岸(an)邊地面廠(chang)房由主廠(chang)房、副廠(chang)房、變(bian)電(dian)站和(he)開關站組成(cheng)。主廠(chang)房尺寸為162.5 rnx29m只55.98m(長火(huo) 寬x高)。安裝(zhuang)4臺137.5 MW的水輪發(fa)電(dian)機(ji)組。發(fa)電(dian)機(ji)層與地面齊平。4臺主變(bian)壓(ya)器布置(zhi)在(zai)廠(chang)后(hou)平臺。開關站布置(zhi)在(zai)廠(chang)房左側,中控室布置(zhi)在(zai)再廠(chang)左側安裝(zhuang)間和(he)開關站之(zhi)間。
施工技術
壩(ba)體(ti)填筑施(shi)工技(ji)術
壩體填(tian)筑(zhu)前采(cai)(cai)(cai)用15.5 t振(zhen)(zhen)(zhen)動(dong)(dong)碾將砂(sha)礫石(shi)(shi)(shi)(shi)基礎碾壓6遍(bian)。小區料(liao)(liao)(liao)(liao)由(you)鍔式破碎(sui)(sui)(sui)機(ji)(ji)一次(ci)破碎(sui)(sui)(sui)后(hou),再摻(chan)入15%~20%的(de)(de)天然河(he)砂(sha);冬季(ji)施(shi)工因碾壓時不(bu)能(neng)灑(sa)水(shui)(shui),摻(chan)25%~30%的(de)(de)人(ren)工破碎(sui)(sui)(sui)石(shi)(shi)(shi)(shi)粉(fen),填(tian)筑(zhu)時由(you)人(ren)工攤(tan)鋪(pu),層(ceng)厚(hou)(hou)0.15 m,15.5 t振(zhen)(zhen)(zhen)動(dong)(dong)碾靜碾16遍(bian)。墊(dian)層(ceng)料(liao)(liao)(liao)(liao)由(you)鍔式破碎(sui)(sui)(sui)機(ji)(ji)破碎(sui)(sui)(sui)石(shi)(shi)(shi)(shi)料(liao)(liao)(liao)(liao),破碎(sui)(sui)(sui)機(ji)(ji)規(gui)格200×400、400×600、600×900共6臺,最大(da)生產能(neng)力每班為702 m3。為滿足細顆料(liao)(liao)(liao)(liao)含量要求(qiu),常溫季(ji)節摻(chan)入15%~20%天然河(he)砂(sha)。超(chao)(chao)徑(jing)石(shi)(shi)(shi)(shi)不(bu)超(chao)(chao)過3%。含泥量不(bu)超(chao)(chao)過3%。人(ren)工攤(tan)鋪(pu)鋪(pu)層(ceng)厚(hou)(hou)0.4 m,并向上游側超(chao)(chao)填(tian)不(bu)大(da)于(yu)15 cm,常溫下灑(sa)水(shui)(shui)20%,15.5 t振(zhen)(zhen)(zhen)動(dong)(dong)碾壓10遍(bian)。采(cai)(cai)(cai)用反擊式碎(sui)(sui)(sui)石(shi)(shi)(shi)(shi)機(ji)(ji)生產最大(da)粒(li)徑(jing)為2cm的(de)(de)細石(shi)(shi)(shi)(shi)料(liao)(liao)(liao)(liao),含水(shui)(shui)率(lv)1.7%~2.3%,含泥量極少(不(bu)超(chao)(chao)過0.5%),受凍后(hou)不(bu)易結塊,是良好的(de)(de)細料(liao)(liao)(liao)(liao)來源。摻(chan)配比例為粗(cu)碎(sui)(sui)(sui)石(shi)(shi)(shi)(shi)∶細碎(sui)(sui)(sui)石(shi)(shi)(shi)(shi)(含石(shi)(shi)(shi)(shi)粉(fen))∶水(shui)(shui)洗砂(sha)=4∶1∶1,滿足了設計要求(qiu),解決(jue)了大(da)壩墊(dian)層(ceng)料(liao)(liao)(liao)(liao)冬季(ji)填(tian)筑(zhu)施(shi)工的(de)(de)難題。過渡(du)層(ceng)料(liao)(liao)(liao)(liao)有(you)采(cai)(cai)(cai)石(shi)(shi)(shi)(shi)場(chang)爆(bao)破開(kai)采(cai)(cai)(cai),剔除(chu)大(da)于(yu)30 cm的(de)(de)超(chao)(chao)徑(jing)料(liao)(liao)(liao)(liao),用4 m3電鏟及(ji)3 m3裝(zhuang)(zhuang)載機(ji)(ji)裝(zhuang)(zhuang)、15 t~20 t自(zi)卸汽車進(jin)行運輸。填(tian)筑(zhu)采(cai)(cai)(cai)用后(hou)退法(fa)卸料(liao)(liao)(liao)(liao),用180 hp推土(tu)機(ji)(ji)攤(tan)平,人(ren)工配合,鋪(pu)層(ceng)厚(hou)(hou)0.4m。主(zhu)、次(ci)堆石(shi)(shi)(shi)(shi)料(liao)(liao)(liao)(liao)分別來自(zi)溢(yi)洪道(dao)和采(cai)(cai)(cai)石(shi)(shi)(shi)(shi)場(chang)及(ji)洞挖料(liao)(liao)(liao)(liao),由(you)4 m3電鏟及(ji)4 m3~6m3裝(zhuang)(zhuang)載機(ji)(ji)裝(zhuang)(zhuang)、15 t~42 t自(zi)卸汽車進(jin)行運輸,進(jin)占法(fa)卸料(liao)(liao)(liao)(liao),推土(tu)機(ji)(ji)攤(tan)平,鋪(pu)層(ceng)厚(hou)(hou)主(zhu)堆為60 cm、80cm、次(ci)堆為100cm、120cm,15.5t振(zhen)(zhen)(zhen)動(dong)(dong)碾碾壓。在實際填(tian)筑(zhu)過程中,最大(da)日(ri)填(tian)筑(zhu)強度:墊(dian)層(ceng)料(liao)(liao)(liao)(liao)達1240m3/d,過渡(du)層(ceng)料(liao)(liao)(liao)(liao)達1500m3/d,堆石(shi)(shi)(shi)(shi)料(liao)(liao)(liao)(liao)達14000m3/d。
面(mian)板混凝土施工技術
無軌(gui)滑(hua)(hua)模(mo)(mo)模(mo)(mo)具設(she)計(ji)制(zhi)(zhi)作(zuo) 自行設(she)計(ji)制(zhi)(zhi)作(zuo)無軌(gui)滑(hua)(hua)模(mo)(mo)設(she)施(shi),據砼(tong)面(mian)(mian)(mian)板(ban)(ban)寬度(du)考慮兩種規格.滑(hua)(hua)模(mo)(mo)設(she)施(shi)主要(yao)由滑(hua)(hua)動(dong)模(mo)(mo)板(ban)(ban)、側模(mo)(mo)板(ban)(ban)、各種專用(yong)運輸臺(tai)車(che)、混(hun)凝土拌合(he)運輸機(ji)具和提升運輸機(ji)具等(deng)構(gou)成.滑(hua)(hua)動(dong)模(mo)(mo)板(ban)(ban)骨架(jia)采(cai)用(yong)桁(heng)(heng)架(jia)式,由63.5mm×5mm鋼管焊制(zhi)(zhi),每榀桁(heng)(heng)架(jia)高0.61m,長15m(用(yong)于14 m寬面(mian)(mian)(mian)板(ban)(ban)),桁(heng)(heng)架(jia)中心(xin)距0.4m,共4榀,各榀桁(heng)(heng)架(jia)間采(cai)用(yong)系桿連接(jie)。由于面(mian)(mian)(mian)板(ban)(ban)施(shi)工(gong)面(mian)(mian)(mian)積(ji)較大,考慮其抗磨耐久性,滑(hua)(hua)模(mo)(mo)面(mian)(mian)(mian)板(ban)(ban)采(cai)用(yong)10mm厚鋼板(ban)(ban)。滑(hua)(hua)動(dong)模(mo)(mo)板(ban)(ban)尺寸(cun)(14 cm板(ban)(ban)寬)為(wei)1.6 m×15m.滑(hua)(hua)動(dong)模(mo)(mo)板(ban)(ban)重(zhong)量為(wei)4.032t,滑(hua)(hua)升時根據上(shang)浮情況加鋼筋作(zuo)配重(zhong)。側模(mo)(mo)結(jie)構(gou)采(cai)用(yong)50×5角鋼焊制(zhi)(zhi)成框架(jia),人工(gong)安拆側模(mo)(mo)每節長2m。每套側模(mo)(mo)可(ke)周(zhou)轉(zhuan)使用(yong),由布設(she)在(zai)壩頂(ding)的(de)2臺(tai)5t卷(juan)揚(yang)機(ji)牽(qian)引,卷(juan)揚(yang)機(ji)由埋(mai)入(ru)堆石(shi)內的(de)簡易地錨固定。
面板砼澆筑
⑴混凝土配合(he)比(bi):
根(gen)據面板滑模砼(tong)(tong)的(de)施工要求,大壩水(shui)(shui)泥的(de)mgo含量偏高使砼(tong)(tong)具有微膨脹性(xing),可以抵消砼(tong)(tong)的(de)大部分收縮變(bian)形(xing), sk引氣(qi)減水(shui)(shui)劑(ji)對提(ti)高砼(tong)(tong)抗凍性(xing)能效果顯(xian)著,有不透水(shui)(shui)性(xing)和(he)抗裂性(xing),增加砼(tong)(tong)與鋼(gang)筋的(de)握(wo)裹強(qiang)度(du)的(de)特性(xing)。
⑵周邊縫(feng)瀝青砂墊層施工
瀝(li)青(qing)砂(sha)墊層(ceng)施(shi)(shi)(shi)工(gong)分(fen)兩種(zhong):一種(zhong)是預(yu)先制(zhi)成(cheng)塊,每塊長(chang)約30 cm,運至現場作業面(mian)(mian)安(an)裝,各塊間隙用(yong)熱瀝(li)青(qing)灌注;變形(xing)模(mo)量80~100mpa,瀝(li)青(qing)砂(sha)在(zai)5~37.5℃的(de)氣(qi)溫下進(jin)(jin)行澆(jiao)注不堆坡,并形(xing)成(cheng)1∶1.4邊坡,進(jin)(jin)行了(le)試驗.試驗初,曾采用(yong)粉煤(mei)灰、石棉和砂(sha)摻(chan)合(he)(he)料(liao),把摻(chan)合(he)(he)料(liao)改為(wei)(wei)水泥和河砂(sha)。一期(qi)(qi)面(mian)(mian)板(ban)(ban)(ban)砼施(shi)(shi)(shi)工(gong)(即高程197.5 m以下,板(ban)(ban)(ban)塊最大(da)(da)斜長(chang)81.3m),完成(cheng)砼量18348 m3,面(mian)(mian)板(ban)(ban)(ban)面(mian)(mian)積為(wei)(wei)42008 m2,最大(da)(da)滑(hua)升(sheng)速(su)度(du)(du)為(wei)(wei)4.6 m/h;二(er)期(qi)(qi)面(mian)(mian)板(ban)(ban)(ban)砼施(shi)(shi)(shi)工(gong)(即高程197.5m~208.0m),完成(cheng)砼量2339m3,面(mian)(mian)板(ban)(ban)(ban)面(mian)(mian)積為(wei)(wei)11492m2,最大(da)(da)滑(hua)升(sheng)速(su)度(du)(du)為(wei)(wei)5.19 m/h。為(wei)(wei)滿足施(shi)(shi)(shi)工(gong)進(jin)(jin)度(du)(du)要求(qiu),共制(zhi)做5套(tao)滑(hua)模(mo)模(mo)具,其(qi)中14m板(ban)(ban)(ban)寬的(de)4套(tao),7m板(ban)(ban)(ban)寬的(de)1套(tao)。
進(jin)水(shui)口(kou)攔污(wu)柵(zha)墩砼滑模(mo)施工技(ji)術
每(mei)個(ge)進水口由5個(ge)攔污(wu)柵(zha)(zha)(zha)墩(dun)(dun)(dun)組成(cheng)(cheng)四孔,墩(dun)(dun)(dun)間凈距6 m,邊墩(dun)(dun)(dun)和中(zhong)(zhong)墩(dun)(dun)(dun)斷面(mian)均為(wei)2 m×10 m,次中(zhong)(zhong)墩(dun)(dun)(dun)斷面(mian)均為(wei)1.4 m×10 m。為(wei)滿(man)足截(jie)流對進水口施工形(xing)象面(mian)貌要求,每(mei)個(ge)進水口5個(ge)攔污(wu)柵(zha)(zha)(zha)墩(dun)(dun)(dun)需(xu)采(cai)用(yong)整(zheng)體同步滑(hua)模(mo),制(zhi)作一套模(mo)具可(ke)滿(man)足兩個(ge)進水口周轉(zhuan)使用(yong)要求。根(gen)據以(yi)往滑(hua)模(mo)施工經驗,取消攔污(wu)柵(zha)(zha)(zha)槽(cao)二(er)期砼(tong),即柵(zha)(zha)(zha)槽(cao)埋(mai)件隨滑(hua)模(mo)施工逐(zhu)節安裝(zhuang)。滑(hua)模(mo)起滑(hua)在(zai)底板形(xing)成(cheng)(cheng)后進行,砼(tong)水平運(yun)輸(shu)(shu)(shu)采(cai)用(yong)6m3砼(tong)攪拌運(yun)輸(shu)(shu)(shu)車.砼(tong)垂直運(yun)輸(shu)(shu)(shu)前期主要采(cai)用(yong)布置在(zai)地(di)面(mian)上的30/10園筒型高(gao)(gao)架門機吊罐(guan)入(ru)倉,后期利用(yong)布置在(zai)上部(bu)高(gao)(gao)程(cheng)(cheng)239m路和攔污(wu)柵(zha)(zha)(zha)下游高(gao)(gao)程(cheng)(cheng)218.5m撐墻上的門機吊罐(guan)入(ru)倉,塔吊吊小罐(guan)輔助作業(ye)。
調(diao)壓井井筒砼初砌滑模施工技(ji)術
每(mei)個(ge)調壓(ya)井(jing)斷面(mian)(mian)輪(lun)廓由(you)園弧、直線和折線組成(cheng),砼(tong)(tong)襯(chen)砌后(hou)斷面(mian)(mian)短跨×長跨約為17 m×20m。自底(di)(di)板(ban)高(gao)程(cheng)(cheng)(cheng)155.08m至頂(ding)部高(gao)程(cheng)(cheng)(cheng)250m,井(jing)筒(tong)高(gao)95m。根據1996年底(di)(di)首機發電對2#調壓(ya)井(jing)工(gong)期要(yao)求(qiu),決定井(jing)筒(tong)砼(tong)(tong)襯(chen)砌采用(yong)(yong)滑(hua)(hua)(hua)(hua)模施工(gong)方(fang)案。考(kao)慮1#調壓(ya)井(jing)亦(yi)用(yong)(yong)此方(fang)案施工(gong),需要(yao)設計制作一套安拆(chai)方(fang)便的液(ye)壓(ya)滑(hua)(hua)(hua)(hua)模模具(ju)。滑(hua)(hua)(hua)(hua)模設施主要(yao)由(you)操(cao)作平(ping)臺、提(ti)(ti)升(sheng)機架、圍(wei)圈、模板(ban)、砼(tong)(tong)和材(cai)料工(gong)器具(ju)運(yun)輸(shu)(shu)系統(tong)、人員上(shang)(shang)下交通系統(tong)組成(cheng).操(cao)作平(ping)臺承(cheng)重結構采用(yong)(yong)網狀鋼(gang)(gang)桁(heng)架式結構,以減輕(qing)平(ping)臺本身自重。采用(yong)(yong)l75×5和l100×10角鋼(gang)(gang)焊制,提(ti)(ti)升(sheng)架安裝兩臺千斤頂(ding)。提(ti)(ti)升(sheng)架共82個(ge),千斤頂(ding)140個(ge)滑(hua)(hua)(hua)(hua)模。模體總(zong)重為43t。砼(tong)(tong)水平(ping)運(yun)輸(shu)(shu)采用(yong)(yong)6m3砼(tong)(tong)攪(jiao)拌(ban)運(yun)輸(shu)(shu)車,砼(tong)(tong)垂直運(yun)輸(shu)(shu),由(you)于(yu)調壓(ya)井(jing)滑(hua)(hua)(hua)(hua)模從(cong)底(di)(di)板(ban)上(shang)(shang)開(kai)始滑(hua)(hua)(hua)(hua)升(sheng),低部位阻抗板(ban)以下采用(yong)(yong)砼(tong)(tong)泵自底(di)(di)洞輸(shu)(shu)送砼(tong)(tong)入倉,溜(liu)管(guan)(guan)為φ219鋼(gang)(gang)管(guan)(guan),溜(liu)管(guan)(guan)每(mei)節(jie)長2.0m,節(jie)間由(you)法蘭連接,每(mei)節(jie)均(jun)與鋼(gang)(gang)絲繩(sheng)連接牢固(gu),每(mei)節(jie)溜(liu)管(guan)(guan)承(cheng)受(shou)荷(he)載均(jun)傳到(dao)鋼(gang)(gang)絲繩(sheng)上(shang)(shang),鋼(gang)(gang)絲繩(sheng)錨固(gu)在(zai)井(jing)頂(ding)部平(ping)臺的地錨上(shang)(shang)。2#調壓(ya)井(jing)井(jing)筒(tong)砼(tong)(tong)滑(hua)(hua)(hua)(hua)模每(mei)升(sheng)高(gao)1m需安裝鋼(gang)(gang)筋(jin)(jin)10t,鋼(gang)(gang)筋(jin)(jin)安裝量大且(qie)內層(ceng)水平(ping)環向(xiang)鋼(gang)(gang)筋(jin)(jin)綁(bang)扎困難(nan),而且(qie)在(zai)高(gao)程(cheng)(cheng)(cheng)228.5m又進行了改模,對滑(hua)(hua)(hua)(hua)升(sheng)進度(du)有一定影響。正常滑(hua)(hua)(hua)(hua)升(sheng)速(su)度(du)為
蓮(lian)花水電站引水隧洞(dong)砼襯砌施(shi)工技術
2.5 m/d。
引水隧洞砼襯砌施工技術
1)邊頂拱(gong)鋼模(mo)臺車(che)
臺(tai)車模(mo)(mo)板(ban)由7節(jie)(jie)模(mo)(mo)板(ban)拼裝組(zu)(zu)成,支(zhi)立總長10.5m,每(mei)(mei)節(jie)(jie)模(mo)(mo)板(ban)沿環向分(fen)為(wei)5段(duan)(duan)。頂(ding)拱段(duan)(duan)為(wei)一(yi)整體(ti)鋼(gang)模(mo)(mo),兩側邊(bian)拱段(duan)(duan)均由大、小兩塊鋼(gang)模(mo)(mo)組(zu)(zu)成。邊(bian)頂(ding)拱砼(tong)襯砌斷(duan)面的中心角為(wei)288.54°。在(zai)邊(bian)拱鋼(gang)模(mo)(mo)上設(she)置砼(tong)下料操作窗口若干個,模(mo)(mo)板(ban)收(shou)分(fen)采(cai)用機械收(shou)分(fen)系(xi)統,利用設(she)置在(zai)頂(ding)拱模(mo)(mo)板(ban)和兩側邊(bian)拱模(mo)(mo)板(ban)上的液(ye)壓千斤頂(ding)和絲杠進(jin)行收(shou)分(fen)。臺(tai)車底腳裝有可沿彎曲軌(gui)道行走的輪子8個,每(mei)(mei)臺(tai)鋼(gang)模(mo)(mo)臺(tai)車重160 t。
2)底拱鋼模臺(tai)車
臺車(che)模(mo)板(ban)由6節(jie)鋼(gang)(gang)模(mo)板(ban)拼裝組(zu)成,支立(li)總長10.5m,每節(jie)鋼(gang)(gang)模(mo)為一整塊模(mo)板(ban),底拱(gong)鋼(gang)(gang)模(mo)上設置(zhi)下料(liao)口,6節(jie)鋼(gang)(gang)模(mo)與(yu)3根縱梁聯(lian)接形(xing)成整體模(mo)板(ban),縱橫梁之間(jian)用絲杠連(lian)接,通過操作絲杠起落(luo)模(mo)板(ban),橫梁與(yu)聯(lian)系梁連(lian)接,聯(lian)梁底部(bu)安裝4個(ge)可沿軌道(dao)行走的(de)輪子,底拱(gong)臺車(che)重20t。
3)臺車軌道及牽引(yin)動力設(she)施
邊(bian)(bian)頂(ding)拱鋼(gang)(gang)模(mo)臺車的(de)軌道(dao)(dao),是在(zai)開(kai)挖(wa)底板上(shang)(shang)墊(dian)碎渣(zha)或(huo)(huo)小骨料,其(qi)上(shang)(shang)鋪枕木(mu),軌道(dao)(dao)采用(yong)qu80型鋼(gang)(gang)軌.底拱鋼(gang)(gang)模(mo)臺車的(de)軌道(dao)(dao),采用(yong)在(zai)已(yi)澆邊(bian)(bian)拱砼上(shang)(shang)預埋鋼(gang)(gang)板,其(qi)上(shang)(shang)固(gu)定120工(gong)字鋼(gang)(gang)作為軌道(dao)(dao)。邊(bian)(bian)頂(ding)拱鋼(gang)(gang)模(mo)臺車采用(yong)180hp推(tui)土(tu)機(ji)牽(qian)引行走。底拱鋼(gang)(gang)模(mo)臺車采用(yong)180hp推(tui)土(tu)機(ji)或(huo)(huo)1臺5t,卷揚機(ji)牽(qian)引行走。
4)砼襯砌施工
由于(yu)進(jin)(jin)入(ru)(ru)洞(dong)內的施(shi)工(gong)(gong)通道(dao)只有進(jin)(jin)口一條,故砼(tong)(tong)整體澆(jiao)筑(zhu)施(shi)工(gong)(gong)應自(zi)內向外(wai)進(jin)(jin)行,每(mei)個澆(jiao)筑(zhu)段長(chang)度(du)(du)為10.5m。采(cai)用先(xian)邊頂(ding)拱、后底拱的施(shi)工(gong)(gong)順序,每(mei)條洞(dong)邊頂(ding)拱砼(tong)(tong)襯砌(qi)分(fen)幾(ji)個襯砌(qi)單元(yuan)進(jin)(jin)行,自(zi)里向外(wai)逐(zhu)單元(yuan)進(jin)(jin)行;每(mei)個單元(yuan)長(chang)度(du)(du)為10個澆(jiao)筑(zhu)段左右(you),各布(bu)置兩臺邊頂(ding)拱鋼模(mo)臺車(che),分(fen)別(bie)布(bu)置在端(duan)部,一臺鋼筋(jin)臺車(che)布(bu)置在兩臺邊頂(ding)鋼模(mo)臺車(che)之間(jian)。砼(tong)(tong)運(yun)輸采(cai)用6m3砼(tong)(tong)攪拌運(yun)輸車(che)運(yun)入(ru)(ru)洞(dong)內至(zhi)90m3/h砼(tong)(tong)泵車(che),由砼(tong)(tong)泵車(che)壓送砼(tong)(tong)入(ru)(ru)倉。用回彈儀在環縫砼(tong)(tong)上進(jin)(jin)行測試(shi),控制在砼(tong)(tong)抗(kang)壓強(qiang)度(du)(du)達(da)45kg/cm2以上進(jin)(jin)行脫模(mo)。一般需要18~24h達(da)到脫模(mo)強(qiang)度(du)(du).采(cai)用上述施(shi)工(gong)(gong)工(gong)(gong)藝,隧洞(dong)砼(tong)(tong)襯砌(qi)月進(jin)(jin)尺達(da)105m,保(bao)證了隧洞(dong)施(shi)工(gong)(gong)形象面貌(mao)的按(an)期(qi)實現。
安全監測
介紹
蓮花(hua)水電站(zhan)大(da)壩安全監測(ce)(ce)系(xi)統由東(dong)北勘測(ce)(ce)設(she)(she)計研究院設(she)(she)計。大(da)、二壩內部(bu)觀測(ce)(ce)儀(yi)器埋設(she)(she)和外部(bu)觀測(ce)(ce)測(ce)(ce)點澆筑隨(sui)壩體施工同(tong)步(bu)進行(xing),從1993年開(kai)始,到(dao)1997年結束。大(da)壩安全監測(ce)(ce)以變形、滲(shen)流為主,應力(li)應變為輔;施工期(qi)和運行(xing)期(qi)監測(ce)(ce)兼(jian)顧。
項目
⑴變形監(jian)(jian)測:包括大、二(er)壩(ba)壩(ba)體(ti)(ti)表面(mian)水(shui)平(ping)、垂直(zhi)位移;大壩(ba)壩(ba)體(ti)(ti)內部水(shui)平(ping)、垂直(zhi)位移;砼面(mian)板板間縫(feng)、周邊縫(feng)開合度及面(mian)板撓(nao)曲變形監(jian)(jian)測。
⑵滲(shen)(shen)流(liu)監(jian)測:包括大(da)壩(ba)壩(ba)體滲(shen)(shen)透壓力;大(da)、二壩(ba)滲(shen)(shen)流(liu)量和繞壩(ba)滲(shen)(shen)流(liu)監(jian)測。
⑶應(ying)(ying)力應(ying)(ying)變監測:包括(kuo)大壩(ba)砼(tong)面(mian)板應(ying)(ying)力應(ying)(ying)變和溫度監測。
系統布置
1、基點網
蓮花電站水(shui)(shui)平位(wei)移監測(ce)基(ji)點(dian)(dian)網—邊角(jiao)網,由(you)壩區(qu)內(nei)的(de)13個點(dian)(dian)組(zu)成(cheng),采用(yong)T2002+DI2002全站儀按(an)(an)國家一等(deng)(deng)三角(jiao)精(jing)度(du)施測(ce);垂(chui)直位(wei)移監測(ce)基(ji)點(dian)(dian)網—精(jing)密(mi)水(shui)(shui)準(zhun)網,由(you)壩下游區(qu)的(de)26個點(dian)(dian)組(zu)成(cheng),采用(yong)NI002A精(jing)密(mi)水(shui)(shui)準(zhun)儀和銦瓦水(shui)(shui)準(zhun)尺(chi)按(an)(an)國家一等(deng)(deng)水(shui)(shui)準(zhun)精(jing)度(du)施測(ce)。電站大壩、二壩、溢洪道等(deng)(deng)建筑物的(de)水(shui)(shui)平、垂(chui)直位(wei)移觀測(ce)均以上述網作為基(ji)點(dian)(dian)網。
2、大、二壩(ba)監測系統布(bu)置
⑴大、二壩(ba)壩(ba)體表面變形監(jian)測
蓮花大壩(ba)(ba)(ba)(混(hun)凝土面(mian)板(ban)堆石壩(ba)(ba)(ba))在面(mian)板(ban)、防浪墻(qiang)頂(ding)部、壩(ba)(ba)(ba)頂(ding)公路下游(you)側(ce)、馬道及(ji)進廠公路上(shang)游(you)側(ce)平行于(yu)壩(ba)(ba)(ba)軸(zhou)(zhou)線(xian)布置五(wu)排總(zong)計52個(ge)水(shui)(shui)(shui)(shui)平位移永(yong)久(jiu)測點(dian)(dian)(dian);在壩(ba)(ba)(ba)下游(you)坡觀(guan)測室旁還有6個(ge)測點(dian)(dian)(dian)。二(er)壩(ba)(ba)(ba)(粘土心墻(qiang)砂(sha)礫(li)石壩(ba)(ba)(ba))在上(shang)游(you)坡、防浪墻(qiang)頂(ding)部、壩(ba)(ba)(ba)頂(ding)公路下游(you)側(ce)及(ji)馬道處平行于(yu)壩(ba)(ba)(ba)軸(zhou)(zhou)線(xian)布置四排總(zong)計13個(ge)水(shui)(shui)(shui)(shui)平位移永(yong)久(jiu)測點(dian)(dian)(dian)。壩(ba)(ba)(ba)體表(biao)面(mian)水(shui)(shui)(shui)(shui)平位移利用(yong)邊角(jiao)網(wang)做為工作(zuo)基點(dian)(dian)(dian),采(cai)用(yong)邊角(jiao)交會(hui)或邊長交會(hui)法,應用(yong)T2002+DI2002按二(er)等三角(jiao)精(jing)(jing)度(du)進行觀(guan)測。壩(ba)(ba)(ba)體表(biao)面(mian)垂直(zhi)位移永(yong)久(jiu)測點(dian)(dian)(dian)與水(shui)(shui)(shui)(shui)平位移永(yong)久(jiu)測點(dian)(dian)(dian)在同一測墩(dun)上(shang)。壩(ba)(ba)(ba)體表(biao)面(mian)垂直(zhi)位移利用(yong)精(jing)(jing)密水(shui)(shui)(shui)(shui)準網(wang)做為工作(zuo)基點(dian)(dian)(dian),組成閉合或附(fu)合水(shui)(shui)(shui)(shui)準路線(xian),應用(yong)NI002A精(jing)(jing)密水(shui)(shui)(shui)(shui)準儀和銦瓦水(shui)(shui)(shui)(shui)準尺按二(er)等水(shui)(shui)(shui)(shui)準精(jing)(jing)度(du)進行觀(guan)測。
⑵大壩(ba)壩(ba)體(ti)內部變形監測
取(qu)大(da)壩(ba)兩(liang)個(ge)(ge)(ge)典型斷(duan)面(mian)(mian)0+170樁號(hao)(hao)(最大(da)壩(ba)高斷(duan)面(mian)(mian))和(he)0+496樁號(hao)(hao)(地質條件復雜斷(duan)面(mian)(mian))做為大(da)壩(ba)壩(ba)體內部水平(ping)、垂(chui)(chui)直(zhi)位(wei)移(yi)(yi)的觀(guan)測(ce)(ce)斷(duan)面(mian)(mian)。在(zai)每個(ge)(ge)(ge)斷(duan)面(mian)(mian)壩(ba)下游(you)坡▽180m、▽192m和(he)▽205m三(san)個(ge)(ge)(ge)高程處布(bu)置(zhi)6個(ge)(ge)(ge)內部變形觀(guan)測(ce)(ce)室,室內布(bu)置(zhi)水平(ping)位(wei)移(yi)(yi)和(he)垂(chui)(chui)直(zhi)位(wei)移(yi)(yi)測(ce)(ce)點(dian)(dian)總計(ji)各24個(ge)(ge)(ge)。水平(ping)位(wei)移(yi)(yi)和(he)垂(chui)(chui)直(zhi)位(wei)移(yi)(yi)測(ce)(ce)點(dian)(dian)同(tong)組(zu)布(bu)置(zhi),同(tong)一層測(ce)(ce)點(dian)(dian)以觀(guan)測(ce)(ce)主堆石體位(wei)移(yi)(yi)為主,每層都在(zai)過渡料(liao)與墊層料(liao)之(zhi)間布(bu)置(zhi)一個(ge)(ge)(ge)測(ce)(ce)點(dian)(dian),以此點(dian)(dian)位(wei)移(yi)(yi)代表面(mian)(mian)板(ban)位(wei)移(yi)(yi),兼測(ce)(ce)面(mian)(mian)板(ban)撓度。水平(ping)位(wei)移(yi)(yi)觀(guan)測(ce)(ce)采用引(yin)張線式(shi)水平(ping)位(wei)移(yi)(yi)計(ji),垂(chui)(chui)直(zhi)位(wei)移(yi)(yi)采用水管式(shi)沉降儀。觀(guan)測(ce)(ce)室外(wai)設(she)內外(wai)部聯(lian)系測(ce)(ce)點(dian)(dian)6個(ge)(ge)(ge),觀(guan)測(ce)(ce)觀(guan)測(ce)(ce)室自身(shen)位(wei)移(yi)(yi),以便換(huan)算(suan)出壩(ba)體內部各測(ce)(ce)點(dian)(dian)的絕對位(wei)移(yi)(yi)。
⑶大壩面(mian)板(ban)板(ban)間縫、周邊縫變形監測
在靠近兩岸壩(ba)肩部位的(de)張性(xing)縫(feng)區(qu)域,各布(bu)置2支測(ce)縫(feng)計,觀測(ce)面(mian)板(ban)張性(xing)縫(feng)的(de)開(kai)度大(da)小;在河床部位的(de)壓性(xing)縫(feng)區(qu)域,布(bu)置1支測(ce)縫(feng)計,觀測(ce)面(mian)板(ban)壓性(xing)縫(feng)的(de)閉(bi)合(he)度大(da)小。為觀測(ce)周(zhou)(zhou)(zhou)邊(bian)(bian)縫(feng)的(de)三向位移,在河床及兩岸的(de)周(zhou)(zhou)(zhou)邊(bian)(bian)縫(feng)共布(bu)置9組三向測(ce)縫(feng)計,觀測(ce)垂(chui)直(zhi)于周(zhou)(zhou)(zhou)邊(bian)(bian)縫(feng)的(de)開(kai)合(he)、平行于周(zhou)(zhou)(zhou)邊(bian)(bian)縫(feng)的(de)滑移及垂(chui)直(zhi)于面(mian)板(ban)的(de)沉降。
⑷大、二壩滲流監測
在大壩(ba)最大壩(ba)高(gao)斷面(0+170樁號)建基面靠近上游趾(zhi)板帷(wei)幕后布(bu)置4支(zhi)滲壓計,用來觀測壩(ba)基滲透(tou)壓力。在二壩(ba)0+072剖面,布(bu)置12支(zhi)鋼弦式滲壓計,用以觀測壩(ba)體浸潤線。
在大壩(ba)(ba)(ba)(ba)下游(you)(you)離壩(ba)(ba)(ba)(ba)軸(zhou)線145m,利用原有下游(you)(you)圍(wei)堰,采用高噴灌漿形(xing)(xing)成一道阻水(shui)幕。在下游(you)(you)圍(wei)堰0+265樁號設(she)一座(zuo)三角形(xing)(xing)量(liang)水(shui)堰,觀測(ce)大壩(ba)(ba)(ba)(ba)的(de)總(zong)滲漏量(liang)。利用二(er)(er)壩(ba)(ba)(ba)(ba)下游(you)(you)壩(ba)(ba)(ba)(ba)腳(jiao)處的(de)濾水(shui)壩(ba)(ba)(ba)(ba)址做排水(shui)溝,在二(er)(er)壩(ba)(ba)(ba)(ba)下游(you)(you)樁號1+052處設(she)一座(zuo)三角形(xing)(xing)量(liang)水(shui)堰,觀測(ce)二(er)(er)壩(ba)(ba)(ba)(ba)的(de)地表滲漏量(liang)。通過在河床中埋設(she)測(ce)壓管(guan)來測(ce)定(ding)(ding)二(er)(er)壩(ba)(ba)(ba)(ba)壩(ba)(ba)(ba)(ba)基(ji)的(de)滲漏量(liang)。大壩(ba)(ba)(ba)(ba)右岸(an)山(shan)(shan)體(ti)布(bu)設(she)7孔(kong),大、二(er)(er)壩(ba)(ba)(ba)(ba)之間(jian)山(shan)(shan)體(ti)布(bu)設(she)2孔(kong),二(er)(er)壩(ba)(ba)(ba)(ba)左岸(an)山(shan)(shan)體(ti)布(bu)設(she)9孔(kong)。對大、二(er)(er)壩(ba)(ba)(ba)(ba)兩岸(an)山(shan)(shan)體(ti)繞壩(ba)(ba)(ba)(ba)滲流(liu)量(liang)進行監測(ce),以此判斷(duan)山(shan)(shan)體(ti)的(de)穩(wen)定(ding)(ding)性(xing),為壩(ba)(ba)(ba)(ba)體(ti)安全(quan)運行提(ti)供(gong)依據。
⑸大壩(ba)面板應(ying)力應(ying)變(bian)監測
在面(mian)板上選擇有代表性的部(bu)位布置(zhi)應(ying)變(bian)計(ji)、鋼筋計(ji)和(he)無應(ying)力(li)計(ji);在靠近周邊縫(feng)的部(bu)位布置(zhi)三向應(ying)變(bian)計(ji)組(zu),用于(yu)觀測(ce)面(mian)板的平(ping)面(mian)應(ying)力(li)狀(zhuang)態(tai)。
自動化狀況
蓮(lian)花水電站(zhan)大壩(ba)安全監(jian)測(ce)(ce)系統(tong)自動(dong)(dong)化(hua)分兩部分:一是內(nei)部監(jian)測(ce)(ce)自動(dong)(dong)化(hua),包括除位(wei)移監(jian)測(ce)(ce)之(zhi)外(wai)(wai)(wai)的(de)所有監(jian)測(ce)(ce)項(xiang)目;二(er)是外(wai)(wai)(wai)部監(jian)測(ce)(ce)自動(dong)(dong)化(hua),指(zhi)大、二(er)壩(ba)表(biao)面(mian)變形監(jian)測(ce)(ce)自動(dong)(dong)化(hua)系統(tong)。內(nei)部自動(dong)(dong)化(hua)系統(tong)由東北勘(kan)測(ce)(ce)設(she)(she)計研究院(yuan)設(she)(she)計并施工,目前此項(xiang)目還未完工,僅能進行數(shu)據(ju)自動(dong)(dong)化(hua)采集。外(wai)(wai)(wai)部自動(dong)(dong)化(hua)系統(tong)采用(yong)徠卡(ka)測(ce)(ce)量機器人進行自動(dong)(dong)化(hua)監(jian)測(ce)(ce),該項(xiang)目正在(zai)建設(she)(she)中,預計將于今(jin)年6月投入使用(yong)。
1、內部監測(ce)自動化
大壩面板板間(jian)縫、周邊縫變形(xing)監(jian)(jian)測;面板應力應變監(jian)(jian)測;大、二壩滲流(liu)監(jian)(jian)測均(jun)在自(zi)動(dong)化監(jian)(jian)測系(xi)統(tong)中。在原(yuan)測點處(chu)(chu)布置測量控(kong)制單元(MCU),通過通訊電纜引(yin)至副廠房(fang)工(gong)作室,接收上(shang)位機指(zhi)令,選擇測點,采集(ji)傳感(gan)器信號。按設計將形(xing)成一(yi)個具備數(shu)據分析處(chu)(chu)理和遠程監(jian)(jian)控(kong)的自(zi)動(dong)化系(xi)統(tong),目前剛開(kai)發到數(shu)據采集(ji)階段。數(shu)據采集(ji)系(xi)統(tong)初步運行已近兩年,其間(jian)被雷電擊壞兩次,說明采集(ji)設備防雷措施需加強。另外(wai),由于壩址地(di)處(chu)(chu)高(gao)寒地(di)區,冬季低溫對系(xi)統(tong)正常運行也有一(yi)定影(ying)響。
2、外(wai)部監測(ce)自動化
利用壩下游L4和L6兩基(ji)點(dian)做自動(dong)(dong)化(hua)(hua)監測(ce)(ce)(ce)(ce)測(ce)(ce)(ce)(ce)站(zhan),分別放(fang)置一臺徠卡TCA2003全(quan)站(zhan)儀(被廠(chang)家稱為測(ce)(ce)(ce)(ce)量機(ji)器人),在大、二(er)(er)壩壩后原(yuan)測(ce)(ce)(ce)(ce)點(dian)固定棱鏡,采(cai)(cai)用邊長或邊角(jiao)交(jiao)會法觀(guan)測(ce)(ce)(ce)(ce),從而求得測(ce)(ce)(ce)(ce)點(dian)坐標。觀(guan)測(ce)(ce)(ce)(ce)過程中(zhong)利用大、二(er)(er)壩壩頭基(ji)點(dian)L8、L9和L10作為參考點(dian),進(jin)行溫度和氣(qi)壓改正(zheng)。除壩前(qian)(qian)15個測(ce)(ce)(ce)(ce)點(dian)外(wai)(wai)(wai),其(qi)余56個測(ce)(ce)(ce)(ce)點(dian)均與(yu)(yu)自動(dong)(dong)化(hua)(hua)測(ce)(ce)(ce)(ce)站(zhan)通視(shi),這足以反(fan)映(ying)出壩體的整體位(wei)移。另外(wai)(wai)(wai),也可(ke)采(cai)(cai)用人工(gong)觀(guan)測(ce)(ce)(ce)(ce)壩前(qian)(qian)測(ce)(ce)(ce)(ce)點(dian)與(yu)(yu)自動(dong)(dong)化(hua)(hua)觀(guan)測(ce)(ce)(ce)(ce)其(qi)余測(ce)(ce)(ce)(ce)點(dian)相(xiang)結合的半自動(dong)(dong)化(hua)(hua)方案。TCA2003機(ji)載軟件可(ke)完成水平角(jiao)、垂直(zhi)角(jiao)和斜(xie)距的野外(wai)(wai)(wai)觀(guan)測(ce)(ce)(ce)(ce)記錄(lu)工(gong)作,觀(guan)測(ce)(ce)(ce)(ce)中(zhong)能自動(dong)(dong)檢查各種限差。TCA2003可(ke)與(yu)(yu)計算機(ji)相(xiang)聯,實現采(cai)(cai)集控制和數據傳(chuan)輸(shu)、整理自動(dong)(dong)化(hua)(hua);遠(yuan)期目標在牡丹江(jiang)進(jin)行遠(yuan)程控制。