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钢箱梁结构已在桥梁设计中广泛应用,对钢箱梁的施工技术也在不断地创新和完善.结合无锡北中路项目三跨连续钢箱梁跨越沪宁高速公路顶推施工,详细介绍了分段拼装双曲线顶推技术施工时的顶推施工工艺、施工方法、支墩及滑道设计与施工等. 相似文献
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长沙市湘江三汉矾大桥主桥为双塔双索面五跨自锚式悬索桥,上部为钢箱梁结构,综合考虑工期、成本以及圆形竖曲线顶推技术的可行性,采用由西向东一端顶推的方案,通过对顶推平台、临时墩、导梁和牵引系统的计算分析.提出钢箱梁制作安装顶推线形控制技术措施,顶推施工取得成功,为同类工程提供了宝贵的经验。 相似文献
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本文详细介绍了某高速公路大桥主桥钢箱梁的整个施工工艺以及在施工过程中应加强控制的关键问题。希望可以引起相关施工单位注意,并为其施工提供一点参考。 相似文献
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结合工程概况,根据钢箱梁的空间曲线特点,拟定了三种施工方案,经分析比选选定了钢箱梁分段拼装、分段顶推的施工方案,并对其施工技术进行了详细介绍,对类似条件的桥梁顶推施工具有一定的借鉴作用。 相似文献
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根据梅家山立交高架桥工程特点,采用了顶推法施工方案,研究了顶推施工临时设施设计方法,提出顶推力与摩擦力自平衡设计与无弯曲应力空间折管式临时支墩设计等设计理念,并利用桥梁专业分析软件Midas civil进行应力分析,归纳总结了顶推施工的注意事项,以供参考。 相似文献
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Yandangshan Bridge is a tied-arch bridge of double-line railway with a (90 + 90) m continuous steel box girder and passes over a very busy highway in China. The incremental launching of the steel box girder of this bridge is a challenge for bridge builders, mainly because of the patch loading caused by large self-weight, large camber, unsymmetrical and flexible temporary transverse beams. Due to on-site working conditions, many commonly used measures cannot be taken for the launching of this bridge. The launching process is simulated using finite element method. The results have shown that significant local stress concentration would occur in the web plate and bottom plate of the girder if no improved measures are applied. The influencing factors of the stress concentration are studied. Four measures to reduce the local stress of the girder are presented and put into practice: to add two slide shoes on every pier; weld six short launching noses at the diaphragm of leading end of the box girder; pre-lift the 6 slide shoes on one temporary pier at different positions to eliminate part of the deflection of the temporary transverse beams, and use special adjustable slide shoes in one span. The whole launching process has been monitored and the measured stress and deformation coincide with the results of finite element analysis. Good effects have been obtained by applying the four improved measures. The incremental launching of the steel box girder of Yandangshan Bridge has been successful. 相似文献
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公路桥梁钢箱梁顶推施工技术探讨 总被引:1,自引:0,他引:1
结合工程实例,根据桥梁施工现场的环境情况,给出了钢箱梁顶推法步骤,并对顶推施工时临时设施搭设与布置、梁段顶推、施工监控等程序进行了描述与分析,以指导工程实践,确保公路桥梁建设质量。 相似文献
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结合灵丘至山阴高速公路大运枢纽跨大运高速公路钢箱梁实际施工,探讨了钢箱梁在跨线高速公路施工注意事项,同时对钢箱梁安装准备工作、运输、吊装及交通管制方案进行了叙述,从而为同类工程积累了经验。 相似文献