续论预应力混凝土系杆拱桥的设计与施工研究(续)——连续梁拱组合桥梁  

Design and construction research fur concrete tied-arch bridge(continuation)combined bridge with continuous beam and arch

作　　者：金成棣[1] 罗攀 

机构地区：[1]同济大学 [2]上海浦东工程建设管理有限公司

出　　处：《上海公路》2008年第1期1-7,4,共7页Shanghai Highways

摘　　要：2系杆拱施工的发展 2.1钢管混凝土拱肋施工 2.1.1钢管拱肋的吊装 对于中承式拱桥或半中承式系杆拱桥,实践证明采用无支架施工既安全又经济。在施工步骤上,首先完成三角体或边跨施工,然后安装中跨桥面以上拱肋。对于通航河流,可以采用浮吊来安装;对于跨径特别大的,可以中间设临时墩,分段吊装在临时墩上、临时接头，但此时必须注意安装段间的变形协调，即安装构件的静力计算图向拱式计算图式的体系转换。一般可设临时铰，允许接头转动，落架后形成三铰拱，铰位置可不对称，完成体系转换后再使接头连续。The paper presents the design of the tied-arch bridge based on continuous beam and the construction practices.The subjects of the research are half-through tie-arch bridges and through tie-arch brides.The generalization of the bridge construction practices are made in the paper,including general layout,arch beam size and cable arrangements requirements.The construction method is construction technique without support and turning construction technique.The tube pressure state of the arch rib and the new tech- niques such as lifting and jacking-up longitudinal girder and beam using continuous jack.The paper is practical and helping for the readers.

关 键 词：中承式系杆拱桥 拱肋施工 预应力混凝土 组合桥梁 梁拱 设计 分段吊装 计算图式 

分 类 号：U448.225[建筑科学—桥梁与隧道工程] U448.22[交通运输工程—道路与铁道工程]