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跋山涉水高鐵建設大揭秘

發(fā)布時間: 2009-12-28 06:04   來源: 荊楚網   進入電子報

圖為:武廣客專要穿越層巒疊嶂 圖片來源:中國中鐵網站


  荊楚網消息(楚天都市報記者董鳳龍 通訊員郭金富 吳志華 賀林)從長江到珠江,從華中到華南,縱貫南北的武廣客專,不僅要跨越江河天塹,還要穿越重巒疊嶂。這里面究竟有怎樣的故事?昨日,武廣客專的施工者們講述了個中艱辛。
  每個箱梁相當于1.3萬人的重量
  武廣客專全線有橋梁648座,總長度468公里,幾乎占到線路總里程的一半。
  中鐵十一局武廣項目部總工程師伍林介紹,武廣客專架橋用的是32米長、13.4米寬、3.05米高的整孔箱梁,重達900噸,而傳統(tǒng)鐵路用的只是24米長的T形箱梁,重量為100噸。“武廣的一個箱梁相當于是13000個成年人的重量,要把這種箱梁架起來,難度可想而知。”
  他介紹,架設箱梁時,需要用有64個輪胎、價值高達1800萬元的運梁車,才能拖到施工現場,平均每天只能架設2孔。全線共架設了1552孔這種箱梁。兩座箱梁之間,水平誤差不超過1厘米,以保證武廣客專的穩(wěn)定性。
  最長隧道從7年到3年半
  武廣全線有隧道226座,總長度177公里。穿山越嶺,必須修建隧道。
  大瑤山位于湘粵交界之處,素有“南嶺險關”之稱。上世紀80年代,修建衡陽到廣州復線,建設者用7年時間在這里修建隧道,全長14公里,是當時國內最長的雙線電氣化隧道。這次,武廣客專的方案是修建隧道群,由1號、2號、3號隧道組成,橋隧相連。3條隧道全長25公里,用了3年半全部竣工。
  中鐵隧道集團介紹,大瑤山隧道施工時,曾經有一次兩噸多重的施工鐵錘打下去,下面是溶洞,鋼絲斷了,鐵錘不知所終。三年間,克服了大瑤山一號隧道施工中遇到的40多次涌水涌泥,避免了8次嚴重的災害性突水突泥事故。
  10公里隧道穿過瀏陽河
  如果您乘坐武廣客專,您會發(fā)現,出一條長長的隧道幾分鐘后,便到了長沙火車站。那條隧道,是武廣客專全線最長的單體隧道——瀏陽河隧道。
  位于長沙東部的瀏陽河隧道全長10.1公里,起于長沙縣瀟湘西路南側,下穿京珠高速、瀏陽河、機場高速等城市道路和河流到達武廣客運專線新長沙站。
  施工方中鐵四局負責人介紹,為滿足列車高速通過隧道時產生的空氣動力效應要求及旅客舒適度的要求,隧道斷面凈空有效面積達到100平方米,施工開挖斷面達到160平方米,遠大于普通鐵路隧道70平方米的標準。
  與武漢長江隧道、許多山體隧道不同的是,瀏陽河隧道是單隧道雙軌道,可以容納高速列車雙向行駛,大多數隧道則是雙隧道雙軌道。

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