| 高边坡桥墩倾斜机理分析与安全性评价 |
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| 引用本文： | 唐国斌,;平瑞锋,;梁全富,;王统宁.高边坡桥墩倾斜机理分析与安全性评价[J].地震学刊,2014(4):492-497. |
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| 作者姓名： | 唐国斌 ;平瑞锋 ;梁全富 ;王统宁 |
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| 作者单位： | [1]河南省交通科学技术研究院有限公司,郑州450015; [2]河南高速公路发展有限公司三门峡分公司,郑州472100 |
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| 基金项目： | 河南省科技攻关项目（132102310333）资助 |
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| 摘 要： | 高陡边坡桥墩同时承受上部结构传递的竖向荷载和桩周土体的侧向压力,墩柱受力性能复杂,易出现病害,影响桥梁安全。结合某高速公路桥墩倾斜的工程实例,对高陡边坡桥墩倾斜的机理进行分析,并对倾斜桥墩的安全性能进行评价。通过考虑边坡土体和桥墩的相互作用,采用数值方法对高陡边坡桥墩的受力特征进行研究,分析了墩柱倾斜和开裂的机理,并基于不同荷载下墩柱的内力组合,对墩柱的承载力进行评定。结果表明,边坡潜在滑移面受扰动后产生的坡体推力是引起墩柱倾斜的主要原因,坡体推力与车辆荷载及汽车制动力组合后,桥墩的承载力将不能满足设计要求。
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| 关 键 词： | 高速公路 高边坡桥墩 倾斜机理分析 安全性评价 |
Inclination Mechanism Analysis and Safety Assessment of Piers in High Slope |
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| Institution: | TANG Guo-bin , PING Rui-feng , LIANG Quan-fu , WANG Tong-ning (1. Henan Transportation Research Institute Co. Ltd. , Zhengzhou 450015, China; Henan Highway Development Co. Ltd., Sanmenxia Branch, Sanmenxia 472100, China) |
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| Abstract: | Both vertical loads from superstructure and horizontal loads from soil act on the piers in high and steep slope. As a result of the combination effects, the bridge disease tend to appear in the pier, and may create serious security issues. According to an engineering practice, this paper focuses on the mechanism of inclination of piers in high slope, and proposes an evaluation for the safety of piers. The mechanical characteristic of piers was obtained with finite element method, and the inclination and cracking mechanism was analyzed by considering the couple effect of piers and soil. Then the bearing capacity of piers was estimated under various loads combination. The results indicate that the pushing force from the disturbance of potential slip surfaces is the prima- ry cause of inclination of piers, and under combined action of pushing force, vehicle load and mo- tor vehicle＇s brake force, the bearing capacity of piers can＇t satisfy the design requirements. |
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| Keywords: | expressway high slope bridge pier inclination mechanism analysis safety evaluation |
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