本文選題：鐵路橋 + 拱橋　； 參考：《橋梁建設(shè)》2017年01期

【摘要】：成貴鐵路貴州鴨池河特大橋主橋為主跨436m的中承式鋼桁-混凝土結(jié)合拱橋,提籃式拱肋與鉛垂面夾角為4.62°。針對該橋結(jié)構(gòu)特點和橋址處地質(zhì)條件,主拱肋采用分節(jié)段工廠制造,將單元件運至岸邊預拼場內(nèi),在預拼場內(nèi)組拼成節(jié)段,利用大型纜索吊機,采用扣掛法懸臂拼裝。其中,主橋拱肋首節(jié)段利用塔吊進行散件拼裝,散拼順序為先下后上、先內(nèi)后外;拱肋標準節(jié)段在弧形胎架上進行精確組拼,采用吊重480t、跨度460m的大型纜索吊機吊裝,并利用斜拉扣掛系統(tǒng)進行輔助安裝;合龍段采用連續(xù)觀測、精確配切等技術(shù)進行合龍施工;拱肋外包混凝土采用"吊掛支架法"施工。該橋已順利合龍,且合龍精度在±2mm內(nèi),滿足設(shè)計要求。
[Abstract]:The main bridge of the Yazhi River Bridge of Chengdu-Guizhou Railway is a through steel truss concrete composite arch bridge with a main span of 436m. The angle between the basket arch rib and the vertical plane is 4.62 擄. In view of the structural characteristics of the bridge and the geological conditions at the bridge site, the main arch rib is manufactured by a segmental factory, and the single element is transported to the shore pre-patching yard, and the section is assembled in the pre-assembly field, and a large cable crane is used to assemble the cantilever. Among them, the first section of arch rib of main bridge is assembled by tower crane, the order of bulk assembly is first down, then up, first inside and then out; the standard section of arch rib is assembled precisely on the arc tire frame, and is hoisted by a large cable crane with a lifting weight of 480 t and a span of 460 m. The cable-stayed buckling and hanging system is used for auxiliary installation, the closure section is constructed by continuous observation and precise cutting and so on, and the concrete of arch rib is constructed by "hanging support method". The bridge has been closed smoothly, and the precision of closure is within 鹵2mm, which meets the design requirements.
【作者單位】： 中鐵大橋局集團第五工程有限公司;
【分類號】：U445.4

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本文編號：1948676