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頂管機吊裝入始發工作井

始發井內頂管作業現場

8月26日(ri)，南方(fang)電網(wang)公(gong)司(si)重點工(gong)(gong)程(cheng)——對澳輸(shu)電第三通道(dao)220kV煙(yan)墩至(zhi)北安線路工(gong)(gong)程(cheng)傳(chuan)來捷報(bao)：該工(gong)(gong)程(cheng)于8月5日(ri)完成2號工(gong)(gong)作井施(shi)工(gong)(gong)， 并(bing)于26日(ri)開(kai)始馬騮洲(zhou)段隧道(dao)頂管施(shi)工(gong)(gong)，這(zhe)比原計劃提前25天，標(biao)志著該工(gong)(gong)程(cheng)完成又一個關鍵里程(cheng)碑，為(wei)項目2019年6月份投產(chan)打下了堅實基礎(chu)。

據悉，該項(xiang)目建成投(tou)產后將提升對澳輸電的可靠性和安全性，為澳門(men)同胞(bao)分享清潔優(you)質電力、促進粵港澳大灣區建設提供(gong)保(bao)障。

據南(nan)方電網國際公司(si)相關負責人介紹，馬騮(liu)洲(zhou)隧道頂管施工難度大、周期(qi)長，按計劃頂進對于確保整個工期(qi)具有重(zhong)要意義。該段(duan)隧道凈長達到1012米，施工周期(qi)約160個工日。

馬騮洲(zhou)水道(dao)(dao)為國家一(yi)級航道(dao)(dao)，兩岸是高標準國防巡邏(luo)通道(dao)(dao)及濱海景觀(guan)海堤，正在建(jian)設的(de)對(dui)澳(ao)第四供水管(guan)(guan)道(dao)(dao)、十字門公(gong)路隧(sui)道(dao)(dao)、廣(guang)珠城際輕軌(gui)隧(sui)道(dao)(dao)等(deng)(deng)多(duo)條穿越水道(dao)(dao)工(gong)(gong)程(cheng)更進(jin)一(yi)步增加了本工(gong)(gong)程(cheng)的(de)穿越實施難度(du)。為此，項目經(jing)過多(duo)次研討論(lun)證后采(cai)用(yong)了地(di)(di)下(xia)連續(xu)墻工(gong)(gong)井(jing)加長距離大管(guan)(guan)徑頂管(guan)(guan)隧(sui)道(dao)(dao)的(de)方案(an)。考慮(lv)到工(gong)(gong)井(jing)所(suo)處的(de)淤(yu)泥(ni)帶地(di)(di)質(zhi)承(cheng)載力較差、開挖深度(du)大（達到29米），設計采(cai)用(yong)了地(di)(di)下(xia)連續(xu)墻及8道(dao)(dao)支撐的(de)方案(an)，保證工(gong)(gong)井(jing)整(zheng)體結(jie)構的(de)穩定性。隧(sui)道(dao)(dao)頂進(jin)采(cai)用(yong)了內徑2.2米的(de)破巖泥(ni)水平(ping)衡式頂管(guan)(guan)機，確(que)保能夠應對(dui)黏土(tu)、淤(yu)泥(ni)、巖石等(deng)(deng)多(duo)種地(di)(di)質(zhi)條件。

目前，隧(sui)道(dao)始發工(gong)(gong)(gong)井施工(gong)(gong)(gong)完(wan)畢(bi)，隧(sui)道(dao)頂管(guan)作業開工(gong)(gong)(gong)標志著工(gong)(gong)(gong)程建(jian)(jian)設(she)(she)進入新的(de)階(jie)段。記者了解到，項目自今年(nian)2月28日(ri)開工(gong)(gong)(gong)以(yi)來，建(jian)(jian)設(she)(she)團(tuan)隊克服工(gong)(gong)(gong)程地質(zhi)條件(jian)復(fu)雜、場地協(xie)調困(kun)難(nan)以(yi)及(ji)臺風汛(xun)期等困(kun)難(nan)，積極協(xie)調各參建(jian)(jian)單位確保資源投入，安全、優質(zhi)、高效推進工(gong)(gong)(gong)程建(jian)(jian)設(she)(she)。截至8月中旬，項目總體形(xing)象進度完(wan)成(cheng)約40%，安全、質(zhi)量、進度均處于受控(kong)狀態。

【責任編輯：姚騰】