源格中桥独柱墩连续弯梁桥抗倾覆性能提高加固改造  

Improvement of resistance against overturning of continuous curved beam bridgewith single column piers in Yuange Medium Bridge

作　　者：刘彧 LIU Yu(Fuzhou Luxin Highway Design Corporation Limited,Fuzhou 350000)

机构地区：[1]福州路信公路设计有限公司,福建福州350000

出　　处：《福建建筑》2023年第4期89-94,110,共7页Fujian Architecture & Construction

摘　　要：连续弯梁桥,在现代道路工程中已大量应用,在弯道外侧重车(尤其是超载车)作用下,仅受压的双支座中的内支座可能出现脱空,抗倾覆约束力减弱,甚至梁体向外侧翻转的倾覆事故。对连续弯梁桥,尤其是采用独柱墩的桥梁进行抗倾覆稳定检查、验算,提高必要的抗倾覆性能,极其必要。以316国道福建闽侯源格中桥(3跨独柱墩连续弯梁桥)为对象,对原桥的抗倾覆性能进行分析,根据分析结果和实际工程条件,提出抗倾覆性能提升的加固改造方案,并开展相应的分析计算,对实施效果进行分析总结,以增加我国独柱墩弯桥抗倾覆性能提升工程经验。Continuous curved beam bridges are widely used in modern road engineering.Under the action of heavy vehicles(especially overloaded vehicles)on the outside of the curve,the bearing at convex side of the double bearings for compression-only may be separated from the beams,the anti-overturning force will be weakened,and even the beam will overturn down.It is extremely necessary to investigate and check the stability against overturning for the continuous curved beam bridges(especially those with single-column piers)and improve the anti-overturning resistance if necessary.In this paper,the Minhou Yuange Medium Bridge(a 3-span continuous curved beam bridge with single-column piers)on National Trunk Road 316 located in Fujian Province is taken as the studied object,the anti-overturning performance of the original bridge is analyzed.Based on the analysis results and the actual engineering conditions,the strengthening and upgrading scheme for improving the anti-overturning performance of the bridge is proposed,and the corresponding study and calculation are carried out,and the implementation effect is analyzed and summarized,so as to enrich the engineering experiences of the improvement of anti-overturning performance of curved bridge with single-column piers in China and to provide reference for similar engineering applications in the future.

关 键 词：连续弯梁桥 独柱墩 抗倾覆 加固改造 

分 类 号：U44[建筑科学—桥梁与隧道工程]