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跋山涉水高鐵建設(shè)大揭秘

發(fā)布時間: 2009-12-28 06:04   來源: 荊楚網(wǎng)   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(wǎng)站


  荊楚網(wǎng)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?zāi)媳钡奈鋸V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(dāng)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(dāng)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(shè)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(xiàn)場,平均每天只能架設(shè)2孔。全線共架設(shè)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(guān)”之稱。上世紀(jì)80年代,修建衡陽到廣州復(fù)線,建設(shè)者用7年時間在這里修建隧道,全長14公里,是當(dāng)時國內(nèi)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(jīng)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(yán)重的災(zāi)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(xiàn),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(cè),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(zé)人介紹,為滿足列車高速通過隧道時產(chǎn)生的空氣動力效應(yīng)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(biāo)準(zhǔn)。
  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(shù)隧道則是雙隧道雙軌道。

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