道庆洲大桥深水基础工程承台双壁钢围堰施工过程受力性能分析
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摘要
双壁钢围堰主要作为桥梁深水承台施工时一种临时性阻水和模板结构,利用围堰壁板和封底混凝土围水,保证桥梁下部结构施工顺利进行。结合福州市道庆洲大桥A2标段2#主桥墩深水基础工程的实况,运用有限元软件Midas和Ansys对双壁钢围堰在不同施工阶段的受力性能进行分析,研究结果表明:双壁钢围堰的整体强度、刚度和稳定性满足施工要求,并且具有一定的安全储备;封底混凝土的强度、刚度以及围堰的抗浮性能也满足施工要求。该研究为围堰的安全施工提供了保障,也为桥梁深水基础的围堰施工提供了借鉴。
The double-walled steel cofferdam is mainly used as a temporary water-blocking and formwork structure for the construction of bridge deep-water platform.The cofferdam siding and the concrete sealing water are used to ensure the smooth construction of the lower structure of the bridge.Based on the actual situation of the 2# main pier deep water foundation project of A2 section of Daoqingzhou Bridge of Fuzhou City,using finite element software Midas and Ansys to analyze the mechanical behavior of double-walled steel cofferdams in different construction stages.The research results show that the overall strength,stiffness and stability of the double-walled steel cofferdam meet the construction requirements,and have a certain safety reserve.The strength and rigidity of the bottom concrete and the anti-floating performance of the cofferdam also meet the construction requirements.The study provided a guarantee for the safe construction of the cofferdam and also provided a reference for the cofferdam construction of the deepwater foundation of the bridge.
The double-walled steel cofferdam is mainly used as a temporary water-blocking and formwork structure for the construction of bridge deep-water platform.The cofferdam siding and the concrete sealing water are used to ensure the smooth construction of the lower structure of the bridge.Based on the actual situation of the 2# main pier deep water foundation project of A2 section of Daoqingzhou Bridge of Fuzhou City,using finite element software Midas and Ansys to analyze the mechanical behavior of double-walled steel cofferdams in different construction stages.The research results show that the overall strength,stiffness and stability of the double-walled steel cofferdam meet the construction requirements,and have a certain safety reserve.The strength and rigidity of the bottom concrete and the anti-floating performance of the cofferdam also meet the construction requirements.The study provided a guarantee for the safe construction of the cofferdam and also provided a reference for the cofferdam construction of the deepwater foundation of the bridge.
引文
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[3]于艺林,刘国伟,赵勇,曾翌,陈峰.东洲湘江大桥工程双壁钢围堰设计与施工[J].施工技术,2017(S2):831-835.
[4]张益多,周亚运,张国云,顾亮.大型桥梁承台双壁钢围堰施工三维有限元分析[J].江苏科技大学学报(自然科学版),2016(05):508-512.
[5]董石麟,张志宏,李元齐.空间网格结构几何非线性有限元分析方法的研究[J].计算力学学报,2002(3):365-368.
[6]袁江涛.双壁钢围堰施工技术在桥梁工程中的应用研究[D].安徽理工大学,2018.
[7]曾振海.深水基础钢围堰施工关键技术研究[D].长沙理工大学,2012.
[8]黄庆财.大型钢吊箱围堰在螺洲大桥承台施工中的应用[J].福建建设科技,2011(02):42-46.
[9]郭成刚.深水大直径双壁钢围堰封底混凝土厚度设计与施工技术[J].铁道建筑技术,2015(03):63-66.