城市高架桥抗倾覆分析及改造方案研究

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【中图分类号】：U441 【文献标志码】：A 【文章编号】：1008-3197（2025）05-10-06

【DOI编码】：10.3969/j.issn.1008-3197.2025.05.003

Research on Anti-overturning Analysis and Reconstruction Scheme of Urban Viaduct

CAIXiantangl，LIXinchun²

（1.GuangzhouDesignIstituteGroupCo.，td.，Guangzhou5oo，China;2GuangzhouMunicipalEngineeringDesign&Research Institute Co.，Ltd.，Guangzhou 5100o0，China）

Abstract】：Combined with an exampleofanearlylarge-scaleurban viaduct，theanti-overturninganalysis of the singlecolumn pier ramp bridge was caried out bythe overturning axis method and the specification method.The differences of two calculation methods were studied，and the single-support column pier was transformed into a double-support slab pier to verifyitsanti-overturning stability.The results show that the conclusions of the two methodsarequitediferent，andthe anti-overturning momentof dead load is the main factorof the diferenceinstability coeficient.This effct is more significant in curved bridges，and the results ofthe specification method are more safe.After the transformation，the stability coeficient is greatly improved，which ensuresthe safetyofthe structure.However，the influencing factors ofthecoeficient increase of the two methods are diffrent.Combined with the typical disease researchof the main bridge pierand beamof the viaduct， it is foundthat inaddition to the classic single-column pier partialload overturning problem，the inclination， cracking of the pier and thedeviation ofthe beam mayalsolead tothe instabilityofthepierand the roll of the beam under severe conditions.In this project，comprehensive reconstruction measures such as bearing jack收稿日期：2025-04-29 基金项目：住房和城乡建设部科学技术计划项目（2022-K-039） 作者简介：蔡宪棠（1985一），男，硕士，高级工程师，从事桥梁设计工作 ingto release secondary internal force，increasing section method to strengthen pier column and tie beam， adding capping beamand 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.

【Key words】：viaduct;anti-overturn;single-column pier ramp bridge

独柱墩或小支座间距的板墩（如花瓶墩）具有占地面积较小、场地条件适应性强、造型轻巧美观等优点，被广泛应用于城市高架桥梁建设中。（剩余6635字）