ABSTRACT

The large diameter deep inserted steel cylinder is used for the first time in the artificial island project of Hong Kong-Zhuhai-Macao Bridge. Through the ingenious conception of the scheme of large diameter deep inserted steel cylinder, this paper analyzes the working mechanism, design key points and construction key points of large diameter deep inserted steel cylinder structure, and introduces the research and application of large diameter deep inserted steel cylinder technology in foundation pit support engineering of East–West artificial island of Hong Kong Zhuhai Macao Bridge. Two arc-shaped steel plate auxiliary grids are used to connect and seal the adjacent cylinders. The arc steel plate can be manufactured in the factory and transported to the site for construction, which greatly reduces the construction difficulty and material cost. The formed cofferdam Island wall has good water stop performance and good structural stability.

摘要

港珠澳大桥人工岛工程首次采用大直径深插钢筒。通过对大直径深插钢筒方案的巧妙构思，分析了大直径深插钢筒结构的工作机理、设计要点和施工要点，介绍了大直径深插钢筒的研究与应用。港珠澳大桥东西人工岛基坑支护工程中的圆柱技术[J]. 两个圆弧形钢板辅助网格用于连接和密封相邻的气缸。弧形钢板可在工厂制造，运输到现场施工，大大降低了施工难度和材料成本。