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| 高速公路路基结构分析及动变形设计方法 | |
| 引用本文： | 卢正,姚海林,吴万平,杨洋,骆行文.高速公路路基结构分析及动变形设计方法[J].岩土力学,2010,31(9):2907-2912. |
| 作者姓名： | 卢正 姚海林 吴万平 杨洋 骆行文 |
| 作者单位： | 1. 中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,武汉430071 2. 中交第二公路勘察设计研究院有限公司,武汉,430056 3. 山西晋城市交通局,山西,晋城048000 |
| 基金项目： | 西部交通建设科技项，岩土力学与工程国家重点实验室重点项目，岩土力学与工程国家重点实验室前沿探索性项目，中科院知识创新工程重要方向项目 |
| 摘 要： | 考虑汽车运动荷载，基于实测路面不平整资料，对影响动荷载的因素进行分析，提出了动力设计荷载参数的建议值。通过Odemark模量和厚度当量假定，将公路结构简化为3层体系，并利用弹性动力学原理及Fourier变换方法获得了路基顶面动变形的计算式。结合现有规范关于路面弯沉控制的思想，考虑路面路基的相互作用及协调变形，给出了路基顶面的动变形控制标准和确定方法，依据此标准提出了一种路基动变形控制设计的方法。最后以3种典型沥青公路结构为例，进行了路基动变形控制设计。 |
| 关 键 词： | 路面不平整 相互作用 协调变形 Fourier变换 动变形 路基设计 |
| 收稿时间： | 2009-12-22 |
Structural analysis and design method of dynamic deformation of expressway subgrade |
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| LU Zheng,YAO Hai-lin,WU Wan-ping,YANG Yang,LUO Xing-wen.Structural analysis and design method of dynamic deformation of expressway subgrade[J].Rock and Soil Mechanics,2010,31(9):2907-2912. | |
| Authors: | LU Zheng YAO Hai-lin WU Wan-ping YANG Yang LUO Xing-wen |
| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. CCCC Second Highway Consultants Co. Ltd., Wuhan 430056, China; 3. Jincheng Bureau of Communications, Jincheng, Shanxi 048000, China |
| Abstract: | Based on the field test data of pavement roughness, the influencing factors on vehicle loads are analyzed considering moving velocity and vibration frequency of dynamic loads. And the reference value of design load is proposed. A simplified three-layer structure of expressway is obtained by adopting the method of Odemark equivalent hypothesis of modulus-thickness. The computation expression of dynamic deformation of subgrade is deduced with elastodynamics theorem and Fourier transform method. Combining the expression of dynamic deformation and the pavement deflection control standard of current specification, the control value of dynamic deformation of subgrade top and the determination method are derived in the contest of compatibility of deformation between pavement and subgrade. According to the control standard, a new design method of subgrade on control deformation is advanced; and three typical asphalt pavement structure are designed for illustration using this method. |
| Keywords: | pavement roughness interaction compatibility of deformation Fourier transform dynamic deformation subgrade design |
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