發(fā)布時(shí)間：2018-04-21 06:19

  本文選題：鋼-混組合梁 + 凍土地基　； 參考：《橋梁建設(shè)》2017年03期

【摘要】：銀川濱河黃河大橋東水中引橋?yàn)殡p幅(5×80)m曲線連續(xù)鋼-混組合梁橋,由開(kāi)口鋼槽梁和預(yù)制橋面板結(jié)合而成。橋位處施工場(chǎng)地受限,冬季長(zhǎng)、凍土深。為實(shí)現(xiàn)冬季連續(xù)施工,該橋利用單側(cè)場(chǎng)地,充分發(fā)揮鋼-混組合梁的結(jié)構(gòu)特點(diǎn),采用無(wú)跨間支撐的整聯(lián)橫移技術(shù)進(jìn)行雙幅箱梁施工。在施工中,對(duì)地基進(jìn)行凍結(jié)處理,在凍土上設(shè)預(yù)制擴(kuò)大基礎(chǔ)和鋼管柱,形成快速拼裝支架;利用雙幅承臺(tái)設(shè)橫移支架和墩頂橫向滑移裝置,在順橋向跨間無(wú)支撐狀態(tài)下,將右幅鋼梁整聯(lián)橫向滑移就位;采取了鋼梁線形預(yù)設(shè)拋高、澆筑負(fù)彎矩區(qū)底板混凝土、設(shè)剪力釘及分步安裝橋面板等綜合措施,在無(wú)跨間支撐狀態(tài)下將鋼梁與預(yù)制混凝土橋面板結(jié)合,最終形成的鋼-混組合梁結(jié)構(gòu)滿足設(shè)計(jì)目標(biāo)線形與內(nèi)力要求。
[Abstract]:The approach bridge in east water of Yinchuan Binhe Yellow River Bridge is a continuous steel-concrete composite beam bridge with 5 脳 80m curve, which is composed of open steel slot beam and precast deck slab. The construction site of bridge is limited, winter is long and frozen soil is deep. In order to realize the continuous construction in winter, the bridge makes full use of the structural characteristics of the steel-concrete composite beam by using the one-sided site, and adopts the technology of integral transverse movement without span support to carry out the construction of the double-piece box girder. During the construction, the foundation is frozen, prefabricated and expanded foundation and steel pipe column are set up on the frozen soil to form the quick assembling support, and the double cap is equipped with the transverse moving support and the transverse slip device of the pier top, without support in the direction of the bridge, The whole transverse slip position of the right steel beam is put in place, and the comprehensive measures are taken, such as the linear shape of the steel beam is preset to throw high, the bottom slab concrete in the negative bending moment zone is cast, the shear nail is set up and the bridge deck is installed step by step. The steel beam and precast concrete deck slab are combined under the condition of no span support, and the final steel-concrete composite beam structure can meet the design objective linear and internal force requirements.
【作者單位】： 中鐵大橋局集團(tuán)第七工程有限公司;中鐵大橋局集團(tuán)第一工程有限公司;
【分類號(hào)】：U445.4
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本文編號(hào)：1781268