| 考虑三维变形的柔性和刚性基础沉降计算方法 |
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| 引用本文： | 王洪新.考虑三维变形的柔性和刚性基础沉降计算方法[J].岩土力学,2013,34(7):1874-1880. |
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| 作者姓名： | 王洪新 |
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| 作者单位： | 1. 上海城建市政工程(集团)有限公司，上海 200065；2. 香港理工大学 建设及环境学院，香港 |
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| 摘 要： | 传统的分层总和法不能考虑地基三维变形，计算基础沉降的误差非常大。为了减小分层总和法修正系数的范围，基于侧限压缩试验的e-p曲线，推导了能够考虑三维变形的柔性基础沉降算法。只要把传统算法的分层压缩量乘以一个修正系数，新算法就可以在分层总和法基础上考虑地基土的侧向变形。进一步地，通过调整基础底面的压力分布，推导了条形刚性基础沉降的近似算法。算例分析表明，考虑三维变形的沉降算法可以解决传统分层总和法在计算小尺寸基础时沉降过小的问题。计算表明，小尺寸刚性基础沉降计算结果比传统分层总和法大，大尺寸刚性基础沉降计算结果比传统分层总和法小，这可能是导致分层总和法修正系数范围过大的原因之一。应用文中方法有希望减小分层总和法的一部分误差。
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| 关 键 词： | 地基 沉降 柔性基础 刚性基础 分层总和法 |
| 收稿时间： | 2012-08-14 |
Settlement calculating method of flexible and rigid foundations considering three-dimensional deformation |
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| WANG Hong-xin.Settlement calculating method of flexible and rigid foundations considering three-dimensional deformation[J].Rock and Soil Mechanics,2013,34(7):1874-1880. |
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| Authors: | WANG Hong-xin |
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| Institution: | 1. Shanghai Urban Construction Municipal Engineering (Group) Co., Ltd., Shanghai 200065, China; 2. Faculty of Construction and Environment, The Hong Kong Polytechnic University, Hong Kong, China |
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| Abstract: | Traditional layer-wise summation method cannot take the three-dimensional deformation of foundations into account, which results in very large calculation error on foundation settlement. In order to reduce the range of correction factor of layer-wise summation method, a calculating method of flexible foundation settlement is derived based on e-p curves from confined compression test, which can consider three-dimensional deformation of the foundation. The new calculating method can consider lateral deformation of the foundation soil on the basis of layer-wise summation method when the compression amount of each layer calculated by the traditional calculating method is multiplied by a correction factor. Further, by adjusting the pressure distribution on the foundation base, an approximate calculating method of rigid strip foundation settlement is derived. The numerical example shows that the new calculating method considering three-dimensional deformation can solve the problem that it will get smaller settlement on the small size foundation when using traditional layer-wise summation method. From the calculation results, settlement of the small-size rigid foundation calculated by new calculating method is larger than that calculated by traditional method; while settlement of the large-size rigid foundation calculated by new calculating method is smaller than that calculated by traditional method, which may be one of the reasons that correction factor of layer-wise summation method is in a wide range. The application of this new method can reduce the calculation error of layer-wise summation method. |
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| Keywords: | foundation settlement flexible foundation rigid foundation layer-wise summation method |
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