信息公開
Information Disclosure
2016年(nian)4月7日凌(ling)晨，中鐵城投(tou)集團投(tou)融(rong)資(zi)建設的成(cheng)都(dou)地(di)鐵7號線西南(nan)交大站至九里堤站右線暗挖區間5號洞(dong)貫(guan)通，至此該(gai)區間雙線隧道正洞(dong)全(quan)線貫(guan)通。
西南交大(da)(da)站至(zhi)九(jiu)里堤(di)站區間為存車折返(fan)線，全(quan)長504.4米，隧(sui)道(dao)斷(duan)面(mian)大(da)(da)，采用(yong)馬蹄形斷(duan)面(mian)暗挖(wa)施(shi)(shi)工(gong)。區間隧(sui)道(dao)在地(di)(di)(di)下7米至(zhi)10米深(shen)度掘進(jin)，穿(chuan)越(yue)富水(shui)砂(sha)卵(luan)石地(di)(di)(di)層，地(di)(di)(di)質條件差、埋深(shen)淺；下穿(chuan)路(lu)段交通(tong)繁忙、管線密布、建(jian)筑(zhu)(zhu)物密集(ji)(ji),施(shi)(shi)工(gong)環境復(fu)雜，開(kai)(kai)挖(wa)難度大(da)(da)，被(bei)列為成(cheng)(cheng)都(dou)地(di)(di)(di)鐵在建(jian)難度最大(da)(da)工(gong)點。中鐵城投集(ji)(ji)團組織(zhi)專家論證(zheng)，決定采取下穿(chuan)重大(da)(da)風險點時采用(yong)機械(xie)開(kai)(kai)挖(wa)配合的方式，嚴格(ge)控制開(kai)(kai)挖(wa)進(jin)尺，加(jia)強(qiang)地(di)(di)(di)表(biao)沉降監(jian)測(ce)，實時監(jian)控。中鐵十局二公司成(cheng)(cheng)都(dou)地(di)(di)(di)鐵項目(mu)部在施(shi)(shi)工(gong)中，首次在成(cheng)(cheng)都(dou)地(di)(di)(di)區采取大(da)(da)斷(duan)面(mian)側壁導(dao)坑(keng)淺埋富水(shui)暗挖(wa)工(gong)程施(shi)(shi)工(gong)技術，采用(yong)雙(shuang)側壁導(dao)坑(keng)法分(fen)六(liu)步開(kai)(kai)挖(wa)，攻克大(da)(da)斷(duan)面(mian)地(di)(di)(di)鐵區間隧(sui)道(dao)施(shi)(shi)工(gong)難關，經過(guo)16個月奮(fen)戰(zhan)，成(cheng)(cheng)功穿(chuan)過(guo)地(di)(di)(di)面(mian)建(jian)筑(zhu)(zhu)密集(ji)(ji)區、交通(tong)主干道(dao)、二環路(lu)高架、200V電力隧(sui)道(dao)等一級安(an)全(quan)風險源，確保了(le)圍(wei)巖穩定和施(shi)(shi)工(gong)安(an)全(quan)，順利實現區間全(quan)線洞(dong)(dong)通(tong)，為成(cheng)(cheng)都(dou)地(di)(di)(di)鐵7號線10月中旬全(quan)線洞(dong)(dong)通(tong)提(ti)供(gong)了(le)保障(zhang)。
