厦深铁路榕江特大桥主桥施工技术方案研究
发布时间：2018-11-23 18:32
【摘要】：摘要：厦深铁路榕江特大桥系主跨为(110+2×220+110)m的正交异性钢桥面钢桁梁柔性拱桥,跨度在同类型桥梁中居世界首位,结构体系复杂,本文结合工程建设实际和原铁道部科研课题,对该桥钢桁梁柔性拱施工方案、主墩基础施工、钢桥面的垫层方案和施工工艺等方面进行了研究和总结,主要内容如下： (1)对国内外同类桥梁结构与施工技术的历史变迁、研究现状和发展趋势进行了调研和总结。 (2)在参考国内类似桥梁施工方案的基础上,结合榕江特大桥现场水文、地质、工期等情况,同时综合考虑入海口通航要求以及构件、节点运输条件等因素,提出了四个钢桁梁柔性拱施工比选方案,并从技术、工期、资源投入及通航的方便和安全等方面进行施工方案比选论证,推荐采用“墩旁托架+双悬臂对称拼装+主跨分次合龙”的施工方案。 (3)基于经比选后确定的施工方案,提出了钢桁梁柔性拱从施工准备到成桥全过程的施工步骤,并对主梁预拼场、栈桥、临时支墩及支架等临时设施的施工技术进行了研究。 (4)对主桥钢桁梁悬臂拼装过程中的最不利工况进行了力学分析与检算,以确保结构施工过程的安全性。 (5)对该桥主墩的水中测量、深水钻孔灌注桩基础、双壁钢围堰施工水中承台等方案进行了工艺和控制技术的研究和总结。 (6)针对正交异性钢桥面的垫层进行了分析和比选,推荐基于CAP高粘着轻质防护垫层及甲基丙烯酸甲酯(MMA)高性能防水涂层的新型桥面垫层结构,提出了MMA的施工工艺和质量控制措施。 实践表明,该桥的施工方法、工艺及控制技术合理、可靠,可供今后类似桥梁的设计与施工借鉴。
[Abstract]:Abstract: the steel truss flexible arch bridge of orthotropic steel deck with the main span of (1102 脳 220110) m is the largest span in the world in the same type of bridge, and the structure system is complex. In this paper, the construction scheme of the steel truss beam flexible arch, the construction of the main pier foundation, the cushion scheme of the steel bridge deck and the construction technology are studied and summarized in combination with the engineering construction practice and the original scientific research project of the Ministry of Railways. The main contents are as follows: (1) the historical changes, research status and development trend of similar bridge structure and construction technology at home and abroad are investigated and summarized. (2) on the basis of referring to the similar bridge construction plan in China, combining the site hydrology, geology, time limit and other factors of the Rong River Bridge, and taking into account the sea entrance navigation requirements as well as the transportation conditions of components and nodes, etc. In this paper, four construction schemes for flexible arch of steel truss beam are put forward and compared with each other in terms of technology, time limit, resource input, convenience and safety of navigation, etc. The construction scheme of "double cantilever symmetrical assembly of main span by piers" is recommended. (3) based on the construction scheme determined by comparison and selection, the construction steps of steel truss beam flexible arch from construction preparation to bridge completion are put forward, and the construction technology of temporary facilities such as main beam pre-assembly yard, trestle bridge, temporary pier and support are studied. (4) in order to ensure the safety of the construction process, the most unfavorable working conditions of the steel truss girder cantilever assembly of the main bridge are analyzed and calculated in order to ensure the safety of the construction process. (5) the technology and control technology of the main pier of the bridge, the deep water bored pile foundation and the construction water cap of the double wall steel cofferdam are studied and summarized. (6) based on the analysis and comparison of the cushion of orthotropic steel bridge deck, it is recommended that a new type of bridge deck cushion structure based on CAP high adhesion lightweight protective cushion and methyl methacrylate (MMA) high performance waterproof coating is recommended. The construction technology and quality control measures of MMA are put forward. The practice shows that the construction method, technology and control technology of the bridge are reasonable and reliable, which can be used for reference in the design and construction of similar bridges in the future.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4
本文编号：2352376
[Abstract]:Abstract: the steel truss flexible arch bridge of orthotropic steel deck with the main span of (1102 脳 220110) m is the largest span in the world in the same type of bridge, and the structure system is complex. In this paper, the construction scheme of the steel truss beam flexible arch, the construction of the main pier foundation, the cushion scheme of the steel bridge deck and the construction technology are studied and summarized in combination with the engineering construction practice and the original scientific research project of the Ministry of Railways. The main contents are as follows: (1) the historical changes, research status and development trend of similar bridge structure and construction technology at home and abroad are investigated and summarized. (2) on the basis of referring to the similar bridge construction plan in China, combining the site hydrology, geology, time limit and other factors of the Rong River Bridge, and taking into account the sea entrance navigation requirements as well as the transportation conditions of components and nodes, etc. In this paper, four construction schemes for flexible arch of steel truss beam are put forward and compared with each other in terms of technology, time limit, resource input, convenience and safety of navigation, etc. The construction scheme of "double cantilever symmetrical assembly of main span by piers" is recommended. (3) based on the construction scheme determined by comparison and selection, the construction steps of steel truss beam flexible arch from construction preparation to bridge completion are put forward, and the construction technology of temporary facilities such as main beam pre-assembly yard, trestle bridge, temporary pier and support are studied. (4) in order to ensure the safety of the construction process, the most unfavorable working conditions of the steel truss girder cantilever assembly of the main bridge are analyzed and calculated in order to ensure the safety of the construction process. (5) the technology and control technology of the main pier of the bridge, the deep water bored pile foundation and the construction water cap of the double wall steel cofferdam are studied and summarized. (6) based on the analysis and comparison of the cushion of orthotropic steel bridge deck, it is recommended that a new type of bridge deck cushion structure based on CAP high adhesion lightweight protective cushion and methyl methacrylate (MMA) high performance waterproof coating is recommended. The construction technology and quality control measures of MMA are put forward. The practice shows that the construction method, technology and control technology of the bridge are reasonable and reliable, which can be used for reference in the design and construction of similar bridges in the future.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4
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，本文编号：2352376
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