| 交通荷载下加筋土桥台工作性能试验研究 |
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| 引用本文： | 王裘申,徐超,张振,沈盼盼,吴伟成,张逍.交通荷载下加筋土桥台工作性能试验研究[J].岩土力学,2022,43(12):3416-3425. |
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| 作者姓名： | 王裘申 徐超 张振 沈盼盼 吴伟成 张逍 |
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| 作者单位： | 1. 同济大学 岩土及地下工程教育部重点实验室，上海 200092；2. 同济大学 地下建筑与工程系，上海 200092；
3. 上海勘测设计研究院有限公司，上海 200335 |
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| 基金项目： | 国家科技部重点专项（No.2016YFE0105800）；国家自然科学基金（No.41772284，No.42002270）。 |
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| 摘 要： | 加筋土桥台因其具有良好的复合体特性，被广泛应用于各项工程建设，研究它在实际工程条件下的工作性能对其设计和推广具有重要意义。加筋土桥台在服役过程中主要承受交通荷载作用，通过室内大比例缩尺模型的加速应力试验，研究交通荷载条件下加筋土桥台的工作性能，考虑加筋间距与筋材刚度的影响，综合分析了不同交通荷载等级和循环次数下桥台变形与筋材应变的变化规律。研究结果表明，加筋土桥台在交通荷载作用下整体变形随循环次数趋于收敛，其顶部沉降、面板水平位移与筋材应变均远小于规范给出的阈值；各变形值随加载时间呈阶梯状发展，不同条件下变形收敛趋势有所差异；增大筋材刚度和减小加筋层间距有利于控制桥台的变形，筋材刚度对变形的控制作用要优于加筋间距；交通荷载作用下面板水平应变与顶部竖向应变并不满足2倍关系，二者之间的定量关系有待进一步研究。
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| 关 键 词： | 加筋土桥台 交通荷载 模型试验 加速应力法 工作性能 |
| 收稿时间： | 2022-01-08 |
| 修稿时间： | 2022-03-29 |
Experimental study on service performance of reinforced soil abutment subjected to traffic loads |
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| WANG Qiu-shen,XU Chao,ZHANG Zhen,SHEN Pan-pan,WU Wei-cheng,ZHANG Xiao.Experimental study on service performance of reinforced soil abutment subjected to traffic loads[J].Rock and Soil Mechanics,2022,43(12):3416-3425. |
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| Authors: | WANG Qiu-shen XU Chao ZHANG Zhen SHEN Pan-pan WU Wei-cheng ZHANG Xiao |
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| Institution: | 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;
2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
3. Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, China |
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| Abstract: | Reinforced soil abutment is widely used in various engineering constructions because of the good composite performance. The study of its working performance under actual conditions is of great significance to design and popularization. Reinforced soil abutment is mainly subjected to traffic loads in service. In this study, an accelerated stress test of large-scale model was carried out to investigate the working performance of reinforced soil abutment under traffic loads, and to analyze the deformation characteristics of the abutment and the strain of the reinforcements under different loading levers and numbers of loading cycles considering some factors such as spacing and stiffness of the reinforcement. The results indicate that the overall deformation of the reinforced soil abutment tends to converge under traffic loads. The settlement at the top of the abutment, the lateral displacement of the facing and the strain of the reinforcements are much less than the threshold suggested by the current specification. The deformation exhibits stepped variations over loading time and the convergent tendency differs under various conditions. Increasing the stiffness of reinforcement and reducing the spacing of reinforcement are beneficial to improve the ability of deformation resistance of the abutment, while the stiffness of reinforcement plays a more important role in deformation control. In addition, the quantitative relationship between the maximum lateral strain at the facing and the maximum vertical strain at the top of the abutment is not two times, and the quantitative relationship between the two needs to be further studied. |
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| Keywords: | reinforced soil abutment traffic loads model test accelerated stress method service performance |
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