天津建设科技2025，Vol.35Issue(5)：10-15,6.DOI:10.3969/j.issn.1008-3197.2025.05.003
城市高架桥抗倾覆分析及改造方案研究
Research on Anti-overturning Analysis and Reconstruction Scheme of Urban Viaduct
摘要
Abstract
Combined with an example of an early large-scale urban viaduct,the anti-overturning analysis of the single-column pier ramp bridge was carried out by the overturning axis method and the specification method.The dif-ferences of two calculation methods were studied,and the single-support column pier was transformed into a double-support slab pier to verify its anti-overturning stability.The results show that the conclusions of the two methods are quite different,and the anti-overturning moment of dead load is the main factor of the differ-ence in stability coefficient.This effect is more significant in curved bridges,and the results of the specifica-tion method are more safe.After the transformation,the stability coefficient is greatly improved,which en-sures the safety of the structure.However,the influencing factors of the coefficient increase of the two meth-ods are different.Combined with the typical disease research of the main bridge pier and beam of the viaduct,it is found that in addition to the classic single-column pier partial load overturning problem,the inclination,cracking of the pier and the deviation of the beam may also lead to the instability of the pier and the roll of the beam under severe conditions.In this project,comprehensive reconstruction measures such as bearing jack-ing to release secondary internal force,increasing section method to strengthen pier column and tie beam,adding capping beam and limiting block are adopted to effectively reduce the internal force of pier column and significantly improve the bearing capacity,and guarante the anti-overturning safety.关键词
高架桥/抗倾覆/独柱墩匝道桥Key words
viaduct/anti-overturn/single-column pier ramp bridge分类
交通运输引用本文复制引用
蔡宪棠,李新春..城市高架桥抗倾覆分析及改造方案研究[J].天津建设科技,2025,35(5):10-15,6.基金项目
住房和城乡建设部科学技术计划项目(2022-K-039) （2022-K-039）
