深水群桩基础的关键施工技术研究.pdfVIP

第23卷第6期 结 构 工 程 师 Vo1．23，No．6 2007年 12月 Structural Engineers Dee．2007 深水群桩基础的关键施工技术研究 郭征红 徐 伟 (同济大学建筑工程系，上海200092) 摘 要 随着桥梁工程建设规模的扩大，对其深水基础施工技术的要求也越来越高。在综述国内外桥 梁深水基础发展与现状的基础上，以实际特大型桥梁工程为例，研究我国特有且普遍应用的双壁钢吊箱 围堰加钻孔灌注桩高桩承台群桩基础结构的关键施工技术。主要总结了大型施工I1盏时结构(桩基施工 平台与钢吊箱围堰)在结构方案、施工工艺以及设计计算等方面的改进和技术创新；并根据施工结构的 特点扩充了力学性能分析的方法和内容；进而提出了此类深水群桩基础施工中目前亟待解决的主要问 题及今后的研究方向，为同类工程提供经验及技术参考。 关键词 深水群桩基础，施工技术，桩基施工平台，钢吊箱围堰，结构方案，力学性能分析 Research on Key Construction Techniques for Pile Group Foundations in Deep Water GU0 Zhenghong XU Wei (Department of Building Engineering，Ton~i University，Shanghai 200092，China) Abstract In company with scale—up of the bridge construction，the demands of construction techniques for bridge deepwater foundations are more and more exigent．On the basis of the overview of development and status quo about the bridge deepwater foundations at home and abroad，researches on key construction tech— niques of the elevated pile group foundation structure were carried out by taking an actual extra large—scale bridge construction as an example，which is composed of double—wall steel suspension box cofferdam and cast in—situ piling pile Innovations of large—scale temporary structures(including construction platform of pile foundation and steel suspension box cofferdam)were mainly summarized from the aspect of structure scheme， construction technology and design calculation and SO on．Mechanical behavior analysis of structures was wid— ened in both method and content according to the features of construction structures．The main problems which need to be solved urgently were raised and some future directions of research were proposed． Keywords pile group foundation in deep water，construction techniqu