奔驰彩票
2019年04月12日   星期五
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莆炎高速尤溪至建寧里心段第一座中長隧道貫通
文章來源: 發布時間: 2019-03-25 09:01 星期一 閱讀次數: 189
?   3月21日上午,歷經445天的艱苦奮斗,由中鐵十七局六公司承建的莆炎高速尤溪至建寧里心段第一座中長隧道謝厝隧道左洞貫通。   謝厝隧道為莆炎高速尤溪至建寧里心段線路控制性工
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3月21日上午,歷經445天的艱苦奮斗,由中鐵十七局六公司承建的莆炎高速尤溪至建寧里心段第一座中長隧道謝厝隧道左洞貫通。

 

謝厝隧道為莆炎高速尤溪至建寧里心段線路控制性工程,單洞兩車道單向行駛。隧道全長840米,計劃工期486天,96%為Ⅴ級圍巖,是全線圍巖等級最差的隧道,被稱為“在豆腐塊上開洞”的“硬骨頭”。自2017年12月31日正式進洞以來,施工單位克服了地質條件復雜、圍巖等級強度差、施工場地限制等各項困難,采用四步CD法結合上下臺階預留核心土法開挖施工,嚴格執行“短進尺、弱爆破、強支護、勤量測、快封閉”的原則,按照“短、緊、快、勤”的管理模式,加快了施工進度,在保質質量保安全的基礎上,100余名參建工人,每天24小時晝夜奮戰,隧道提前一個半月貫通,為下一步的施工爭取了寶貴時間。

 

謝厝隧道施工中,施工單位不斷優化施工方案,使用鎖腳錨桿定位裝置,大大提高了施工效率和施工質量;二襯模版臺車使用鋼端模,保證了二襯端頭線型平順的同時保證端頭鋼筋定位準確;二襯模板臺車安裝空洞報警器,有效避免了二襯混凝土澆筑中的空洞問題;采用三維建模提前籌劃并率先完成洞口永臨結合綠化及路面施工,打造了項目亮點品質工程。

 

據了解,莆炎高速公路三明境內項目全長237公里,概算總投資305億元,分三期建設。路線起于三明市和福州市交界處(位于珠峰隧道內),順接莆炎高速福州段,途經尤溪、大田、三元、明溪、寧化、建寧六個縣(區),終點與建泰高速公路相接,全線設計速度100公里∕小時,全線共設18處互通式立交及8處配套服務設施。作為三明目前里程最長、輻射縣份最多、單體投資最大的高速公路,建成后對于三明對接港口資源、提升區位優勢、加快老區發展,改善閩西北革命老區人民的生活水平具有重要意義。(集團工程處)

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