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    短線法預制節段橋梁施工工藝研究
    RSS 打印 復制鏈接 發布時間:2017-05-22 10:01:10

     短線法預制節段橋梁施工工藝研究

      本文將我國目前預制節段橋梁施工工藝的應用情況進行了分析介紹,長線法施工工藝得到了長足的發展,并且被廣范的應用于橋梁施工活動中,雖然短線法的施工工藝也具有著較多的優點,但是其橋梁施施工設備以及監控等相較于西方國家相比仍然存在著以下的差距,因此,需要繼續探討與研制出一些高水平的輔助設備來幫助短線法節段橋梁的施工,同時,還需要不斷的更進相關設計水平以及監控手段,從而使得短線法預制節段橋梁施工工藝能夠被更多的橋梁施工工程所應用。

      摘 要 隨著我國社會經濟的發展以及科學技術的突飛猛進,我國橋梁建設的規模漸漸大型化、復雜化,為了使得橋梁建設工作的施工質量,除了不斷的加強施工控制管理以外,還要積極探討一些先進的施工工藝,對于橋梁施工而言,短線法預制節段施工工藝就能夠有效的保障橋梁施工工藝。

      關鍵詞 短線法,節段,橋梁,施工工藝

      1探討預制節段橋梁施工工藝在國內的應用

      我國目前長線法預制階段橋梁的施工工程越來越多,相應的設計以及施工技術也得到了提高與發展,例如:北京四豐立交1號陽道橋、上海新瀏河橋、滬閔架橋等橋梁工程,這些均采用了長線法節段施工工藝。雖然我國的長線節段施工工藝得到了長足的發展,但是短線節段橋梁的施工需要采用大型架橋機來進行施工,另外,其施工工藝以及設備、監控等相較于西方國家相比仍存在一定的差距,并且短線法節段橋梁的相關設計以及施工標準均沒有完善,因此,需要繼續對其進行探討與研究。

      2分析對比短線法預制節段橋梁的優缺點

      短線法預制節段橋梁具有以下幾個優點:第一,節段橋段不會受到施工環境以及氣候條件等因素影響,同時,節段橋梁施工分上下部結構,橋梁上下部結構的制造與架設均可以同時進行,使得施工工序銜接緊湊,因此,節段橋梁的工期較容易控制;第二,由于節段橋梁施工是分層進行的,因此,在橋梁施工過程中,能夠更好的掌握與控制其施工質量;第三,在進行節段橋梁施工過程中會應用到各種施工機械,不僅大大提高了其施工機械化程度,而且還大大降低了其施工成本;第四,對于城市高架橋施工而言,這種拼裝工藝不僅不影響橋下交通的正常運輸,而且還能夠有效的提高高架橋的施工質量水平、效率;第五,由于節段橋段在施工前需要存放一定時間才可進行安裝施工,因此,使得橋梁在拼裝的過程中不會出現收縮、預應力損失等問題,從而有效的實現橋梁線性控制目的;第六,采用節段橋梁施工工藝,不僅使得拼裝施工現場整潔,而且對自然環境均沒有破壞性,因此,其施工工藝符合現代文明標準化要求等。這些是進行短線法預制節段橋梁施工的優點,但是施工過程中仍然存在著以下幾點缺點:第一,進行節段施工時需要采取大型的、專業的起重設備進行施工;第二,對于節段橋梁設計而言,仍是采取傳統的設計方法以及設計經驗,往往出現安裝荷載超出實際營運荷載的情況;第四,這種施工工藝使得整體橋梁施工造價偏高。

      3分析節段橋梁的安裝工藝設備

      3.1關于橋梁梁段的運輸

      當節段梁預制完成后,還需要放置一段時間才可以將其運輸到施工現場,在此過程中該橋梁梁段經過以下運輸過程:通過出運找橋運輸將其運輸至碼頭,然后再通過機械將其卸到運梁船上,最后通過陸地運輸則可將其運輸到施工現場。

      3.2關于架橋機

      對梁段進行運輸的時候一般會采用TP75型架橋機,這種為機、電、液一體化機械設備,其支腿可自如的收縮,并且在進行行走與起吊作業的時候可以根據要求進行遙控、調控,其高靈活性以及高準確性等特點被廣泛的應用于大型工程活動中,有效的保障工程施工安全以及提高工程的施工效率。橋梁施工中的架橋機由以下幾個部分組成:主桁結構、支撐結構、整機橫移機等,這些組成部分對于架橋機而言發揮了巨大的作用,因此,這些組成部分的相應功能均需要滿足架橋機作業的要求。

      4結語

      本文將我國目前短線法預制節段橋梁施工現狀進行了分析介紹,同時,將短線法預制節段橋梁的施工優缺點進行了陳述,最后將短線法預制節段橋梁的安裝工藝設備進行了闡述,雖然我國目前短線法預制節段橋梁施工技術相較于西方國家存在著一定的差距,但是隨著科學技術的發展以及積極引進西方先進國家的施工技術,相信在不久的將來,短線法預制節段橋梁施工技術能夠被廣泛的應用于橋梁施工中,從而為我國橋梁建設工作作出貢獻。

      參考文獻

      [1] 葉建興,梁衛軍,郭敏,史海歐,劉忠誠,鄧劍榮,熊安書,劉智成,杜洋,劉志英,宋晉心,邱永添.節段預制拼裝法設計施工技術[A].中國城市軌道交通新技術(第二集)[C],2007.

      [2] 劉先鵬,劉亞東,戴書學,楊紹斌.箱梁節段短線匹配法預制施工技術[A].第十七屆全國橋梁學術會議論文集(上冊)[C],2006.

      [3] 孫海林,葉列平,劉英奎,黃盛楠.高強輕骨料混凝土橋梁的長期變形[A].“第八屆全國輕骨料及輕骨料混凝土學術討論會”暨“第二屆海峽兩岸輕骨料混凝土產制與應用技術研討會”論文集[C],2006.

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