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    公司新聞
    北京冬奧會延慶賽區“生命線”全線貫通
    來源:   作者:  時間: 2019-01-07

      1月7日,延慶山區最低氣溫已降至零下20攝氏度,已經奮戰15個月的兩支鐵軍南北對向掘進,在小海坨山山體中勝利會師。北京冬奧會延慶賽區“生命線”綜合管廊隧道全線貫通。
      北京冬奧會延慶賽區核心區位于小海坨山南麓,將建設國家高山滑雪中心、國家雪車雪橇中心兩個競賽場館和延慶冬奧村、山地新聞中心兩個非競賽場館。綜合管廊作為延慶賽區基礎性保障工程,為延慶賽區造雪用水、生活用水、再生水、電力、電信及有線電視等硬件接入提供通道。
      為了將工程建設和各種管線對生態環境的影響降到最低,北京冬奧延慶賽區采用了地下綜合管廊方式進行建設。綜合管廊南起佛峪口水庫,北至延慶賽區核心區,全長7.9公里,將為延慶賽區冬奧賽事和冬奧會后開展大眾冰雪運動,實現冬奧場館的可持續利用提供市政保障。
      這是國內首次在山嶺隧道中建設的綜合管廊。延慶賽區綜合管廊進口段海拔550米,出口段海拔1100米,垂直提升達550米。其中01標段平均坡度5%,02標段平均坡度10%,最大坡度達到15%,再加上施工所處燕山山脈地質條件異常復雜,不同強度圍巖交替出現,導致施工難度極大,對技術要求極高。
      該工程由北京市基礎設施投資有限公司牽頭組織實施,中鐵十四局、中鐵十八局負責施工建設。在北京市委、市政府的堅強領導和市重大項目辦、市城管委、延慶區的大力支持下,京投公司與設計、施工等單位通力合作,組建冬奧管廊建設黨員先鋒隊,多次召開專家會,專題研究施工難題,持續進行科技攻關,創新應用了大坡度TBM全斷面硬巖隧道掘進機、軟弱圍巖鉆爆法等施工技術,經過不懈努力,開辟了山嶺隧道大坡度施工的先河。
      該項目于2017年9月正式開工,計劃2019年9月具備通水、通電的條件,先于場館建設實現完工,為延慶賽區2020年1月陸續開始的冬奧會各項測試賽提供保障。

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