关庙汉江大桥扩能改造方案研究  

Research on the Capacity Expansion Reconstruction Scheme of the Guanmiao Hanjiang River Bridge

作　　者：赖波 张沧海 汪晶[1] 于振刚[1] LAI Bo;ZHANG Cang-hai;WANG Jing;YU Zhen-gang(CCCC First Highway Consultants Co.Ltd.,Xi'an 710075,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安市710075

出　　处：《公路》2022年第5期204-212,共9页Highway

摘　　要：关庙汉江大桥位于安康市汉滨区,是207省道跨越汉江的一座大跨径连续刚构桥。大桥原设计荷载标准低,桥梁存在诸多先天缺陷,部分桥跨强度和刚度不满足设计要求,管养单位对其进行了张拉体外预应力、粘贴钢板等主被动措施加固。由于城市快速扩张,需对其进行扩能改造。结合桥梁先天设计缺陷、已实施加固处治方案和承载能力验算分析,确定原桥不拆除、不提载的改造原则,根据两侧拼宽和旁位重建两种改造思路,考虑泄洪、通航以及城市桥梁较高的景观要求,提出了多个桥型方案供比选。Situated in Hanbin District of Ankang City, and as a part of the provincial road No. 207, the Guanmiao Hanjiang River Bridge is a long-span continuous rigid frame structure across over the Hanjiang River. The bridge has many congenital defects, and the strength and stiffness of some bridge spans do not meet the design requirements. The management and maintenance department has carried out active and passive measures such as tensioning external prestressing and install steel plates to reinforce the bridge.Combined with the congenital design defects of the bridge,the reinforcement treatment scheme that has been implemented,and the analysis of the bearing capacity,the reconstruction of the existing bridge will not be dismantled nor be imposed with extra loading.According to the two reconstruction ideas of widening on both sides and side-by-side reconstruction,considering the high landscape requirements of flood discharge,navigation and urban bridges,a number of bridge-type schemes are proposed for comparison and selection.

关 键 词：连续刚构桥 加固处治 扩能改造 桥型方案研究 

分 类 号：U445.6[建筑科学—桥梁与隧道工程]