| 关于桩基软弱下卧层验算的几点认识 |
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| 引用本文： | 李广信,张在明.关于桩基软弱下卧层验算的几点认识[J].岩土工程技术,2007,21(3):109-112. |
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| 作者姓名： | 李广信 张在明 |
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| 作者单位： | 1. 清华大学土木水利学院,北京,100084
2. 北京市勘察设计研究院,北京,100038;北京工业大学建筑工程学院,北京,100022 |
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| 摘 要： | 对于国内外不同的规范、手册中对于桩基软弱下卧层验算的不同方法进行了分析。提出以下的一些建议:承台底面以上的原地基土自重在附加应力计算时可以扣除,在总应力计算时再加上;扣除的群桩实体基础四周的摩阻力应使用群桩四周地基土的摩阻力特征值,而不是极限值;对于地下室中的独立柱的桩基础和内墙的条形桩基础,应当从地下室地面而不是原地面起算进行验算。
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| 关 键 词： | 桩基 软弱下卧层 自重应力 摩阻力 |
| 文章编号： | 1007-2993(2007)03-0109-04 |
| 修稿时间： | 2007年4月10日 |
Suggestions on Checking Computation of Underlying Stratum With Soft Soil in Pile Foundation |
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| Li Guangxin,Zhang Zaiming.Suggestions on Checking Computation of Underlying Stratum With Soft Soil in Pile Foundation[J].Geotechnical Engineering Technique,2007,21(3):109-112. |
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| Authors: | Li Guangxin Zhang Zaiming |
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| Abstract: | The different methods of checking computation of underlying weak layer in pile foundation which are suggested in different codes or handbooks are analyzed.Some suggestions are proposed:the self-weight stress of soil which is between the base of cap and ground surface are added in or subtracted from separately in different stress calculations,the shaft friction around the pile group which is deducted in computation of additional stress is the characteristic value rather than limit value,and the checking computation is carried out from ground surface of basement in the case of strip footing and individual footing in basement. |
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| Keywords: | pile foundation underlying weak layer self?weight stress friction resistance |
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