| 考虑中间主应力影响时条形地基极限承载力公式 |
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| 引用本文： | 周小平,王建华.考虑中间主应力影响时条形地基极限承载力公式[J].上海交通大学学报,2003,37(4):552-555. |
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| 作者姓名： | 周小平 王建华 |
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| 作者单位： | 上海交通大学建筑工程与力学学院,上海,200030 |
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| 摘 要： | 基于Mohr-Coulomb理论的地基极限承载力公式，没有考虑中间主应力的影响．利用双剪强度理论建立了考虑中间主应力影响时的地基极限承载力公式．推导了凝聚力和基础两侧土的超载影响及自重作用影响的理论公式．以条形基础为例，计算了考虑中间主应力对地基极限承载力的影响．研究结果表明，考虑中间主应力影响，地基极限承载力将提高．
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| 关 键 词： | 中间主应力 地基极限承载力 双剪强度理论 |
| 文章编号： | 1006-2467(2003)04-0552-04 |
| 修稿时间： | 2002年1月1日 |
Influence of Intermediate Principal Stress on the Ultimate Bearing Capacity of Foundation |
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| ZHOU Xiao ping,WANG Jian hua.Influence of Intermediate Principal Stress on the Ultimate Bearing Capacity of Foundation[J].Journal of Shanghai Jiaotong University,2003,37(4):552-555. |
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| Authors: | ZHOU Xiao ping WANG Jian hua |
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| Abstract: | The ultimate bearing capacity of foundation based on Mohr Coulomb strength criterion does not consider the influence of intermediate principal stress on yield and failure of soil. In this paper, the influence of mean principal stress on the ultimate bearing capacity of foundation was taken into account based on twin shear strength theory. Formulae were derived with the influence of soils cohesive strength, overburden loads on both sides of foundation and the self weight of soils. Taking strip foundation as an example, the influence of intermediate principal stress on the ultimate bearing capacity of foundation was calculated. The ultimate bearing capacity of foundation will be improved, when the influence of intermediate principal stress on the bearing capacity of foundation is considered. |
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| Keywords: | ultimate bearing capacity of foundation intermediate principal stress twin shear strength theory |
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