| 刚性桩复合地基垫层合理厚度确定方法 |
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| 引用本文： | 亓乐,施建勇,曹权. 刚性桩复合地基垫层合理厚度确定方法[J]. 岩土力学, 2009, 30(11): 3423-3428 |
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| 作者姓名： | 亓乐 施建勇 曹权 |
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| 作者单位： | 1. 河海大学 岩土工程研究所,南京 210098;2. 河海大学 岩土工程水利部重点实验室,南京 210098 |
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| 摘 要： | 垫层厚度的设计是复合地基承载力能否全部发挥的关键因素,垫层的合理厚度基本是靠经验取值,缺少理论根据。基于垫层-桩-土相互作用机制,考虑使复合地基中桩和桩间土承载力发挥度相等的情况下,给出了垫层合理厚度的计算方法。利用该方法可对刚性桩复合地基进行优化设计。分析表明可以通过调整垫层厚度来调节桩-土应力比,较好地发挥桩和土的承载力,达到降低工程造价的目的。
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| 关 键 词： | 刚性桩复合地基 垫层 合理厚度 桩-土应力比 承载力 |
| 收稿时间： | 2008-04-20 |
Method for calculating rational thickness of cushion in rigid pile composite ground |
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| QI Le,SHI Jian-yong,CAO Quan. Method for calculating rational thickness of cushion in rigid pile composite ground[J]. Rock and Soil Mechanics, 2009, 30(11): 3423-3428 |
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| Authors: | QI Le SHI Jian-yong CAO Quan |
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| Affiliation: | 1.Geotechnical Research Institute, Hohai University, Nanjing 210098; 2.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098 |
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| Abstract: | In the process of designing rigid pile composite foundation, thickness of cushion is very important. It is one of the most important factors in the bearing capacity. But there is no theoretical method in designing the thickness of cushion. Based on the relation among pile-soil-cushion, a method for calculating rational thickness of cushion in rigid pile composite ground is derived. The optimization design of the rigid pile composite ground can be performed with this method. Analysis shows that adjusting the stress ratio by changing cushion thickness would exert the bearing capacity and reduce the engineering cost. |
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| Keywords: | rigid pile composite ground cushion rational thickness pile-soil stress ratio bearing capacity |
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