贵阳龙凤大桥上部结构施工关键技术  

Key Construction Technology of Superstructure of Longfeng Bridge in Guiyang

作　　者：周文 陈成杰 施建 ZHOU Wen;CHEN Chengjie;SHI Jian(School of Civil Engineering,Central South University,Changsha,Hunan410075,China;China Railway Guangzhou Engineering Group Co.,Ltd.,Guangzhou,Guangdong511459,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中铁广州工程局集团有限公司,广东广州511459

出　　处：《施工技术（中英文）》2021年第17期1-6,64,共7页Construction Technology

基　　金：中铁广州工程局集团有限公司科研开发项目重点课题:190m钢管拱桥中间128m大节段原位拼装提升技术(重点-08-2016)。

摘　　要：贵阳龙凤大桥是清镇职教城东区与西区主要连接通道上的重要控制性工程,主桥为中承式钢管混凝土拱桥,桥下河床为裸露基岩,东岸拱座直接接茬清镇市重要交通要道将军石路,西岸不通公路,施工条件差。针对本桥施工难点,研究上部结构的钢管拱肋架设、钢管混凝土顶升及钢混叠合梁安装等施工关键技术,解决了受限条件下的中承式钢管混凝土拱桥施工难题,并总结了施工新技术。Longfeng Bridge is a control project of the main access between the east and west regions of Zhijiao District in Qingzhen of Guiyang.The main bridge is a half-through concrete-filled steel tubular arch bridge.The riverbed at the bridge site contains exposed rocks.The east arch seat is directly linked to Jiangjunshi Road,an artery line in Qingzhen,while no access road on the west side of the river,which makes the construction quite challenging.The erection and jack-up techniques for the concrete-filled steel tubular arch as well as the installation of the steel-concrete composite girder are studied to address the construction issues.The innovative techniques are summarized.

关 键 词：桥梁工程 中承式拱桥 钢管拱肋 混凝土顶升 钢混叠合梁 钢混组合桩 施工技术 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]