重庆朝天门长江大桥建造中的技术创新

主要介绍重庆朝天门长江大桥主桥钢桁架拱桥在设计、钢桁粱制造、施工技术、关键技术研究方面的技术特点与创新,施工中克服了桥梁结构复杂、施工中结构受力状态变化大、施工布置难度大等困难.该大桥为世界最大跨度拱桥;主桥中点支座为世界上承载力最大的球形铰抗震支座;在国内钢桥永久结构设计中,首次采用主桥下系杆"钢制杆件 辅助系索"的组合式预应力系杆等一系列新技术、新材料、新工艺、新设备,是我国大跨度钢桁 拱桥设计创新的代表作.

Technical Innovation in Construction of Chaotianmen Bridge over Changjiang River in Chongqing

The paper describes the technical characteristics and innovation in the design,manufacture of steel girders,con-struction technologies and research ofkey technologies of the steel girder bridge for the main section ofChaotianmen Bridge over the Changjiang River in Chongqing.The complexity in the structure of the bridge,large variation of strained conditions in the structure during the construction and difficulties in construction scheduling were overcome during the construction of the bridge.The bridge is a...