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近日，中交一公局集(ji)團承建(jian)的(de)北京地鐵(tie)8號(hao)線(xian)6標(biao)項目(mu)通過(guo)土建(jian)、區間(jian)、軌(gui)行區、裝修等全部單位工程驗(yan)收，達到全功能(neng)通車標(biao)準，為北京地鐵(tie)8號(hao)線(xian)全線(xian)通車奠(dian)定了堅實基礎。

北(bei)京地鐵8號線南(nan)起東城區南(nan)鑼鼓(gu)巷(xiang)站(zhan)，北(bei)至昌平區朱辛莊站(zhan)，縱貫南(nan)北(bei)中軸線路，全(quan)長45.6公里，設(she)35座車站(zhan)。一公局(ju)集團承(cheng)建的(de)6標項(xiang)目涉及永(yong)定(ding)門外站(zhan)和永(yong)定(ding)門外站(zhan)至木樨園橋北(bei)站(zhan)區間。

永(yong)定(ding)(ding)門外(wai)站(zhan)(zhan)為換(huan)乘車站(zhan)(zhan)，該(gai)區(qu)域地(di)(di)(di)(di)下(xia)(xia)水(shui)系(xi)極度發(fa)(fa)達(da)，被稱為北(bei)京地(di)(di)(di)(di)鐵(tie)(tie)建(jian)設史上“最難明挖車站(zhan)(zhan)”。項目(mu)團隊(dui)選擇對(dui)環(huan)境影響最小，但(dan)難度最大的“水(shui)下(xia)(xia)開(kai)挖”施工(gong)(gong)(gong)方(fang)法，在(zai)全國地(di)(di)(di)(di)鐵(tie)(tie)施工(gong)(gong)(gong)中尚(shang)屬首例。施工(gong)(gong)(gong)期間(jian)，由(you)于近半車站(zhan)(zhan)結(jie)構(gou)始(shi)終浸泡水(shui)中，70多(duo)(duo)名潛(qian)水(shui)員在(zai)16米多(duo)(duo)深水(shui)下(xia)(xia)作業3個多(duo)(duo)月(yue)。截至永(yong)定(ding)(ding)門外(wai)站(zhan)(zhan)封頂，項目(mu)部共(gong)節約地(di)(di)(di)(di)下(xia)(xia)水(shui)資源8000萬立方(fang)米，相當(dang)于6個杭州西湖的蓄水(shui)總量。永(yong)木(mu)區(qu)間(jian)從永(yong)定(ding)(ding)門外(wai)站(zhan)(zhan)始(shi)發(fa)(fa)，始(shi)發(fa)(fa)端為富水(shui)砂卵石(shi)地(di)(di)(di)(di)層，始(shi)發(fa)(fa)工(gong)(gong)(gong)作面位于地(di)(di)(di)(di)下(xia)(xia)水(shui)位下(xia)(xia)12米處(chu)。為了應(ying)對(dui)地(di)(di)(di)(di)下(xia)(xia)水(shui)突涌，項目(mu)團隊(dui)采(cai)用全密閉鋼(gang)套筒始(shi)發(fa)(fa)工(gong)(gong)(gong)藝確保始(shi)發(fa)(fa)安全，這(zhe)在(zai)北(bei)京地(di)(di)(di)(di)鐵(tie)(tie)施工(gong)(gong)(gong)中屬首次應(ying)用。

【責任編輯：姚騰】