| 路基荷载下地基非线性沉降计算 |
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| 引用本文： | 范亮.路基荷载下地基非线性沉降计算[J].路基工程,2014,0(2):192-195. |
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| 作者姓名： | 范亮 |
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| 作者单位： | 四川省交通运输厅公路规划勘察设计研究院，成都 610041 |
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| 摘 要： | 准确合理地确定地基变形参数是路基沉降分析中尚未很好解决的问题，结合压板载荷试验结果和地基应力水平研究了土质路基荷载下地基土体切线模量的分布特征，在路基中心和路肩下切线模量沿深度呈递增变化，在坡脚下切线模量沿深度呈弓形分布，同一深度土体的切线模量沿路基横向均呈倒Z形分布。由分层总和法对中等压缩性土进行非线性沉降分析，结果表明，切线模量法的沉降计算精度远高于压缩模量法。
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| 关 键 词： | 路基荷载 非线性沉降 切线模量 中等压缩土 |
| 收稿时间： | 2019-11-09 |
Calculation on Nonlinear Settlement of Foundation under Subgrade Load |
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| Abstract: | Determination of foundation deformation parameters correctly and properly has not obtained a good solution from subgrade settlement analysis. Combined with the results of plate loading test and the level of foundation stress, the characteristics of how the soil tangent modulus distributes in foundation under soil subgrade load was studied that the tangent modulus in the subgrade center and under the shoulder increases gradually with the depth; that under the toe presents bow-shaped distribution along with the depth; and that in the same depth presents inverse Z-shaped distribution along with the transverse direction of the subgrade. By layer-wise summation method, nonlinear settlement of medium compression soil was analyzed. The result shows that the accuracy of calculation by tangent modulus method is much higher than that by compression modulus method. |
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