中文摘要：

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Ф75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。

英文摘要：

According to the method statement of ＂large-scale, factory production, standardization, fabricated construction＂ for the Hong Kong-Zhuhai-Macao Bridge, the segments of the piers of non-navigable spans were prefabricated at the factory and were assembled onsite. The assembly of the piers used Ф75 large diameter pres- tressed high-strength rebar anchorage structure, which included the tensioned end of the anchorage system, the fixed end of the anchorage system, the lengthening rebar system and the corrugated pipe connection sealing system. Targeting the system, the raw materials and production process of the large diameter rebars were developed. Aiming at the anchorage system, the low retracting anchorage, the connector for stopping the rotation, the under-anchor structure, the protection technology as well as the long-term monitoring technology were specially analyzed, designed and developed, to ensure the safety and super durability of the precast bridge piers with prestressed high-strength screw rebar anchorage system.