| 复合地基的平面应力扩散效应 |
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| 引用本文： | 徐洋,谢康和,梁仕华. 复合地基的平面应力扩散效应[J]. 土木工程学报, 2002, 35(2): 57-60 |
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| 作者姓名： | 徐洋 谢康和 梁仕华 |
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| 作者单位： | 浙江大学(徐洋，谢康和)，浙江大学(梁仕华) |
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| 摘 要： | 对于柔性或半刚性悬桩复合地基 ,下卧层的沉降量在总沉降中占有相当大的比例 ,但目前常用的沉降计算方法中用均匀或双层地基应力场来代替复合地基应力场 ,前者导致计算值和实测值间存在较大的误差 ,后者虽然能反映复合地基的应力扩散特性 ,但在概念上存在明显的不合理之处。针对此问题 ,本文在用弹性地基梁理论分析平面应变条件下复合地基应力扩散效应机理的基础上提出了应力扩散系数的计算公式。该公式结构简单 ,参数易得 ,结合分层总和法可计算下卧层沉降 ,便于实际应用。
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| 关 键 词： | 复合地基 应力扩散 弹性地基梁 下卧层 双层地基 |
| 文章编号： | 1000-131(2002)02-0057-04 |
| 修稿时间： | 2001-04-11 |
A STUDY ON EFFECT OF PLANE STRESS DISPERSION IN COMPOSITE GROUND |
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| Xu Yang Xie Kang he Liang Shi hua. A STUDY ON EFFECT OF PLANE STRESS DISPERSION IN COMPOSITE GROUND[J]. China Civil Engineering Journal, 2002, 35(2): 57-60 |
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| Authors: | Xu Yang Xie Kang he Liang Shi hua |
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| Abstract: | The settlement of substratum holds a large percentage in composite ground with flexible or half?rigid floating columns.The common methods for calculating settlement of composite ground at present are to regard its stress field as uniform or double?layered one, but both of them are unreasonable because they cannot actually reflect the characteristic of stress dispersion in composite ground. Aimed to these problems, the stress dispersion mechanism of composite ground under plane deformation conditions is analyzed in this paper by the theory of elastic foundation beam and the formula of calculating stress dispersion is proposed. The formula is suitable for practical use in calculating the settlement of substratum owing to its simple configuration and easily obtained parameters. |
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| Keywords: | composite ground stress dispersion elastic foundation beam substratum |
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