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粟学平 《混凝土与水泥制品》2011,(1):66-70
以新建珠江大桥为例,介绍了该桥深水双壁钢围堰施工的关健技术.结合主桥22#和23#桥墩的不同地质条件,采用不同的施工工序,降低了施工难度,保证了施工质量. 相似文献
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随着建筑材料的更新和建筑技术的提高,人们在进行桥梁工程施工时,多了许多既节省材料、安全性又高的创新方式。此外,还有效节省了资本投入,提高了施工效率。 相似文献
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双壁钢围堰在我国桥梁工程深水承台施工中得到越来越广泛的应用,但由于其结构和受力均较复杂,因此在设计与施工过程中必须保证其结构的安全性。本文以官洲河特大桥北引桥为依托,对深水双壁钢围堰的关键施工技术进行实践分析。结果表明,将双壁钢围堰分为上下两节,每节等分成4块圆弧段提前预制加工,有效降低了起重高度及施工便桥承载力的要求,加快了施工进度,降低了安全风险,节约了施工成本,实现了质量、安全、进度与成本的高度统一,可为深水承台施工提供安全可靠的作业环境,以期为类似工程设计与施工提供借鉴。 相似文献
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钢吊箱围堰的施工技术 总被引:4,自引:0,他引:4
以江苏盐城某大桥施工工程为例 ,介绍了水中墩台围堰的设计原理及其施工方案的选择 ,提出了钢吊箱的设计依据及施工工艺 ,指出该施工方法有效地降低了工程造价 ,缩短了工期 相似文献
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就深水高桩承台施工用钢吊箱围堰的结构设计与施工方法进行了论述,介绍了相应的施工特点,并通过对钢吊箱施工过程中结构的分析,揭示了施工过程中钢吊箱整体结构的受力特点,为今后类似工程的施工提供参考借鉴。 相似文献
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Concrete filled steel tubes (CFSTs) are composite members that are commonly used in many countries today. CFST components are used in the United States, but they are more common in Asia, in part because the connections used in Asia are quite labor intensive and there are not standard connections in the U.S. In addition, US design specifications are prepared by separate groups for structural steel and reinforced concrete structures and so composite systems that use CFST components are not overseen by a single group and as such there are several conflicting design standards. In the US, steel tubes used for CFST are more slender (i.e., the diameter-to-thickness, D/t, ratio is larger) than some other countries, and labor practices (structural steel labor is different than reinforcing steel labor) also cause potential conflicts in construction. As a result, CFST has had some use in tall building construction in the US, but very limited use in bridge construction. A research program at the University of Washington has been in progress to address many of these issues with an eye towards universal design expressions, simpler, standardized connections and promotion of accelerated bridge construction (ABC). The research has resulted in recent changes to the American Association of State Highway Officials (AASHTO) bridge design specification as well as state departments of transportation (DOTs), which supports the increased use of CFST in bridge piers and pile and drilled-shaft foundations. An experimental research study which included 19 CFST pier-to-footing (or pile-cap) connection tests and 8 CFST pier column-to-precast pier cap tests was performed. These connections provide good performance under both seismic and gravity loads and address the concerns of US construction. These connections, their design rules and requirements, and their impact on composite behavior and system performance are discussed. These results permit rapid and economical construction of CFST bridge piers, piles and drilled shaft foundations. They encourage the use of more slender and economical tubes, while achieving the benefits of composite construction. 相似文献
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锁口钢管桩围堰在桥梁墩台施工中的应用 总被引:1,自引:0,他引:1
在大型桥梁承台水深、坡陡、近岸、深埋的特定施工条件下,采用锁口钢管桩围堰作为深水、大面积、深基坑的支护结构是比较经济的。在复杂的施工条件下,如何解决阻漏止水等现实性问题,是关键中的关键。 相似文献
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根据在浦南高速公路五里亭Ⅰ号大桥的施工监理经验,针对高墩、大跨径T型钢构的特点,简述了该类悬浇梁桥施工质量控制,对施工、监理有一定的参考借鉴价值,供桥梁施工技术人员参考。 相似文献
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用于苏通大桥主墩围堰的钢吊箱结构超大,既无设计规范、又无施工经验.因此,根据检测数据和计算结果做好反演和反馈工作,对于设计优化、节省工程投资具有重大意义. 相似文献