水中承台吊箱底板一体式柔性止水施工技术. (Chinese)

To implement the environmental protection concept of “Green Construction” and enhance the international image of Chinese enterprises in the construction of The Belt and Road Initiative, we researched the water-stopping technology of underwater bridge pile foundation cap cofferdam base slab in the context of the J.P.Magufuli Bridge Project located in the Lake Victoria area of East Africa. Given the complex structure and cumbersome procedures of the existing flexible water-stopping technology, we developed a one-piece flexible water-stopping structure (patented) for the bottom slab of the underwater pile cap through finite element model analysis, scientific calculation, and field water-stopping test, which simplified the existing huge airbag concrete ring tray, optimized the water-stopping structure, as well as the location and size of the rubber airbag filling port; and elaborated the control points of the one-piece flexible water-stopping construction. The construction practice shows that the one-piece flexible water-stopping structure and its construction technology of the underwater pile cap bottom slab simplify the construction process, reduce the input of human, machine and material resources, and effectively minimize the water pollution brought by the construction while improving the quality of the water-stopping construction, resulting in good economic and social benefits. The relevant experience can be used for other similar projects. [ABSTRACT FROM AUTHOR]

为践行"绿色施工"的环保理念,提升中国企业在一带一路建设中的国际形象,结合位于东非维多利亚湖区的马古富力大桥项目,对水中桥梁桩基承台吊箱围堰底板止水技术进行研究.针对现有的柔性止水整体结构复杂、工序繁琐,通过有限元模型分析、科学计算及现场止水试验,开发出水中承台吊箱底板一体式柔性止水结构(获专利),这简化掉了现有的庞大气囊混凝土环形托盘,优化了止水结构及橡胶气囊充气口位置与尺寸;阐述了一体式柔性止水施工各控制要点.施工实践表明:水中承台吊箱底板一体式柔性止水结构及其施工技术,简化了施工工序,减少了人机料的投入,在提升止水施工质量的同时,有效降低了施工带来的水源污染,产生较好的经济及社会效益,相关经验可供类似工程借鉴. [ABSTRACT FROM AUTHOR]

Copyright of Railway Construction Technology is the property of Railway Construction Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)