| 基于FWD弯沉盆参数的沥青路面土基模量评价方法研究 |
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| 引用本文： | 谢兆星,丛林,郭忠印.基于FWD弯沉盆参数的沥青路面土基模量评价方法研究[J].公路交通科技,2009,26(12). |
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| 作者姓名： | 谢兆星 丛林 郭忠印 |
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| 作者单位： | 1. 同济大学,道路与交通工程教育部重点实验室,上海,201804;上海市市政规划设计研究院,上海,200031
2. 同济大学,道路与交通工程教育部重点实验室,上海,201804 |
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| 基金项目： | 上海市市政工程管理局科技项目 |
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| 摘 要： | 采用动力有限元方法模拟沥青路面在FWD作用下弯沉盆响应,分析土基模量与弯沉盆几何指标之间的关系以及路面开裂、层间滑移和刚性层深度等变量对弯沉盆的影响.计算结果表明:土基模量可由曲率指标CI_7和形状指标F_8确定;开裂和层间滑移对CI_7-F_8关系曲线没有影响;当刚性层深度小于7 m时,刚性层深度将对CI_7-F_8关系曲线产生影响.最后通过实体工程对评价方法进行了验证.
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| 关 键 词： | 道路工程 土基模量 动力有限元 弯沉盆参数 曲率指标 形状指标 |
Evaluation of Subsoil Modulus for Asphalt Pavement Based on FWD Deflection Basin Parameter |
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| XIE Zhaoxing,CONG Lin,GUO Zhongyin.Evaluation of Subsoil Modulus for Asphalt Pavement Based on FWD Deflection Basin Parameter[J].Journal of Highway and Transportation Research and Development,2009,26(12). |
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| Authors: | XIE Zhaoxing CONG Lin GUO Zhongyin |
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| Abstract: | The asphalt pavement deflection basin response was simulated with FWD by dynamic FEM model. The relationship of subsoil modulus with deflection basin parameters was analyzed. Furthermore, the effects of structure cracks, layer interface sliding and depth of rigid layer on deflection basin response were investigated. The results show that (1) the curvature index CI_7 and shape factor F_8 can be used to determine the subsoil modulus; (2) crack and interface sliding have no influence on CI_7-F_8 characteristic curve; (3) the depth of rigid layer has impact on CI_7-F_8 characteristic curve when the depth is lower than 7 m. The method of subsoil condition assessment was verified by FWD measurements from test sections. |
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| Keywords: | road engineering subsoil modulus dynamic FEM deflection basin parameter curvature index shape factor |
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