港珠澳大桥节段预制桥墩高强钢筋联接锚固体系的关键技术研究

发布时间：2018-11-27 21:38

【摘要】：根据港珠澳大桥"大型化、工厂化、标准化、装配化"的施工方案,其非通航孔桥墩采用工厂节段预制,现场拼装联接技术,其墩身的拼装联接采用鐖75大直径预应力高强螺纹钢筋联接锚固体系,该体系含张拉端锚固系统、固定端锚固系统、钢筋接长系统及波纹管连接密封系统。针对该体系,对大直径螺纹钢筋母材的原材料及生产工艺进行了研制;对张拉端锚固系统的低回缩锚具、钢筋接长系统的止转连接器、张拉端与固定端锚固系统的锚下结构以及整个体系的防护技术和长期监测技术进行了专门的分析、设计和研制。确保预制桥墩拼装联接锚固体系的安全与超耐久性。
[Abstract]:According to the construction plan of HongKong-Zhuhai-Macao Bridge "large-scale, industrialized, standardized and assembled", the piers of non-navigable orifices are prefabricated by factory segments, and the on-site assembling and connecting technology is used. The Anchorage system of the pier is composed of Anchorage system of tension end, anchor system of fixed end, length system of steel bar and corrugated pipe connection and seal system, which is composed of Anchorage system of tension end, anchoring system of fixed end, length system of reinforcing bar and corrugated pipe connection and sealing system. In view of this system, the raw material and production technology of large diameter rebar base material are developed. This paper makes a special analysis, design and development of the low retractive Anchorage of the tension end Anchorage system, the stop connector of the steel bar connection system, the anchor structure of the tension end and the fixed end Anchorage system, the protection technology of the whole system and the long-term monitoring technology. To ensure the safety and durability of the prefabricated bridge pier assembly and connection Anchorage system.
【作者单位】：广西岩土力学与工程重点实验室;桂林理工大学土木与建筑工程学院;柳州欧维姆机械股份有限公司;
【基金】：国家自然科学基金(41272358) 广西科技计划项目(桂科AD16380017) 桂林理工大学人才基金(002401003499)
【分类号】：U445.4

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