大纵坡、小半径曲线钢箱梁支座脱空处理
发布时间：2018-01-12 07:06
本文关键词：大纵坡、小半径曲线钢箱梁支座脱空处理 出处：《桥梁建设》2014年06期 论文类型：期刊论文
更多相关文章： 立交桥 钢箱梁 支座 结构线形 支座反力 同步顶升 支座脱空处理 桥梁维修
【摘要】：重庆市南岸区黄桷湾立交M匝道第2联(MP4~MP6号墩)跨径为(22+27)m,其设计半径为50m,纵坡5.4%,横坡6%,采用预制钢箱梁结构,整体吊装施工。在整体吊装就位后发现MP4号及MP6号墩的内侧支座均出现脱空,为保证桥梁后期的安全运营,进行支座脱空处理。通过分析可知支座脱空原因是在加工时,未考虑钢箱梁的空间扭曲状态,仅在一个水平面内加工制作。根据支座脱空原因及钢箱梁的实际形状,采用通过整体旋转钢箱梁,重新确定各支座的标高,使其支反力值均满足设计要求的方案进行支座脱空处理。采用同步顶升技术施工,使各支座均落实,达到预期处理的目的。
[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.
【作者单位】： 林同h旯使こ套裳，
本文编号：1413181
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