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李红鸽¹ , 吴志文¹ , 贾铂杰² , 滕仁栋³ , 李南南⁴

 

(1. 石家庄市道桥设施管护中心 , 石家庄 050019; 2. 北京中铁装饰工程有限公司 , 北京 100040;

3. 河北省建筑科学研究院有限公司 , 石家庄 050021;

4. 石家庄市道桥建设总公司综合维护管理所 , 石家庄 050091)

摘  要: 为了提升独柱墩结构桥梁的抗倾覆安全水平 , 解决其在运营阶段频繁发生倾覆事故 、抗倾覆稳定性不足的关键工程难题 , 降低事故引发的重大经济损失与人员伤亡风险 。以三跨独柱墩连续梁桥这一典型结构形式为研究对象 。通过有限元软件建立精细化数值模型 , 模拟极端偏载工况  (单车超载 200%) 获取加固前支座变形及箱梁转角数据 , 同时提出多种加固方案 , 通过模型计算分析加固后相关参数的变化规律 , 系统验证各方案的可行性 、实操性及适用性 。结果表明 , 辅助墩与联端抗拉装置联合加固方案效果最优 , 具备 2. 59 倍安全储备 , 可从根本上解决独柱墩连续梁桥在极端偏载作用下抗倾覆稳定性不足的问题 。研究结果可为同类在役独柱墩连续梁桥的抗倾覆稳定性研究及加固工程设计 、施工提供可靠的理论依据与技术支撑。

关键词: 独柱墩连续梁桥 ; 抗倾覆稳定性 ; 有限元模拟 ; 加固方案 ; 极端偏载

中图分类号: U445. 7      文献标志码: A      文章编号: 1005-8249 (2026) 04-0134-10

DOI:10. 19860/j. cnki. issn1005-8249. 2026. 04. 020

 

Research on Anti-overturning Reinforcement Technology of Single-pillar Pier of Viaduct Bridge

LI Hongge¹ , WU Zhiwen¹ , JIA Bojie² , TENG Rendong³ , LI Nannan⁴

(1. Shijiazhuang Road & Bridge Facilities Management and Maintenance Center, Shijiazhuang 050019, China;

2. Beijing China Railway Decoration Engineering Co. , Ltd. , Beijing 100040, China;

3. Hebei Academy of Building Research Co. , Ltd. , Shijiazhuang 050021, China;

4. Comprehensive Maintenance Management Office of Shijiazhuang Road & Bridge Construction Corporation, Shijiazhuang 050091, China)

Abstract : In order to improve the anti - overturning safety level of single - column pier structural bridges, solve the key engineering problems of frequent overturning accidents and insufficient anti -overturning stability in the operation stage, and achieve the goal of reducing the risk of major economic losses and casualties caused by accidents.  The specific research is carried out in the typical structural form of three-span single-column pier continuous beam bridge. Through the finite element software, a refined numerical model is established to simulate the extreme partial load condition ( 200 % overload of single vehicle ) , collect the data of bearing deformation and box girder rotation angle before reinforcement, and put forward a variety of reinforcement schemes. The variation law of relevant parameters after reinforcement is analyzed by model calculation, and the feasibility, practicality and optimal applicability of each scheme are systematically verified.  The research shows that the combined reinforcement scheme of auxiliary pier and joint end tensile device has the best effect, with 2. 59 times safety reserve, which can fundamentally solve the problem of insufficient anti-overturning stability of single-column pier continuous beam bridge under extreme eccentric load.  The research results can provide reliable theoretical basis and technical support for the anti - overturning stability research and reinforcement engineering design and construction of similar in-service single-column pier continuous girder bridges.

Key words: single column pier continuous beam bridge ; anti-overturning stability ; finite element simulation ; reinforcement scheme ; extreme partial load