本文關(guān)鍵詞：大縱坡、小半徑曲線鋼箱梁支座脫空處理　出處：《橋梁建設(shè)》2014年06期 　論文類型：期刊論文

  更多相關(guān)文章： 立交橋 鋼箱梁 支座 結(jié)構(gòu)線形 支座反力 同步頂升 支座脫空處理 橋梁維修

【摘要】：重慶市南岸區(qū)黃桷灣立交M匝道第2聯(lián)(MP4~MP6號(hào)墩)跨徑為(22+27)m,其設(shè)計(jì)半徑為50m,縱坡5.4%,橫坡6%,采用預(yù)制鋼箱梁結(jié)構(gòu),整體吊裝施工。在整體吊裝就位后發(fā)現(xiàn)MP4號(hào)及MP6號(hào)墩的內(nèi)側(cè)支座均出現(xiàn)脫空,為保證橋梁后期的安全運(yùn)營(yíng),進(jìn)行支座脫空處理。通過(guò)分析可知支座脫空原因是在加工時(shí),未考慮鋼箱梁的空間扭曲狀態(tài),僅在一個(gè)水平面內(nèi)加工制作。根據(jù)支座脫空原因及鋼箱梁的實(shí)際形狀,采用通過(guò)整體旋轉(zhuǎn)鋼箱梁,重新確定各支座的標(biāo)高,使其支反力值均滿足設(shè)計(jì)要求的方案進(jìn)行支座脫空處理。采用同步頂升技術(shù)施工,使各支座均落實(shí),達(dá)到預(yù)期處理的目的。
[Abstract]:The span of Pier No. 2 of M ramp of Huangjuewan Interchange M ramp in Nanan District of Chongqing is 22 27 m, its design radius is 50 m, the longitudinal slope is 5. 4 m, and the horizontal slope is 6%. Using precast steel box girder structure, the whole hoisting construction. After the whole hoisting position, it is found that the inner support of MP4 and MP6 pier are empty, in order to ensure the safe operation of the bridge in the later stage. Through analysis, we can know that the reason of support void is that the spatial distortion of steel box girder is not taken into account in processing. According to the reason of the pedestal detachment and the actual shape of the steel box girder, the elevation of each support is determined by adopting the whole rotating steel box girder. In order to make the support counterforce value meet the design requirements, the support void treatment is carried out, and the synchronous lifting technology is adopted to make all the supports carry out, so as to achieve the purpose of expected treatment.
【作者單位】： 林同h旯使こ套裳，

本文編號(hào)：1413181