| 黄土中扩底长桩的竖向承载性状分析 |
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| 引用本文： | 赵楠,刘忠玉. 黄土中扩底长桩的竖向承载性状分析[J]. 郑州大学学报(工学版), 2006, 27(1): 40-43 |
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| 作者姓名： | 赵楠 刘忠玉 |
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| 作者单位： | 郑州大学土木工程学院,河南,郑州,450002 |
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| 摘 要： | 对置于黄土层中并支承在粉质黏土层的人工挖孔扩底长桩进行了现场静载试验,量测了每级荷载作用下桩顶沉降s和桩底沉降sb,据此分析了扩底长桩的竖向承载性状.指出扩底长桩的受力机理明显不同于扩底短桩,与置于黄土层的扩底超长桩承载性状基本相同,其极限承载力以侧阻力为主,具有显著的端承摩擦桩的特点.另外,试验数据表明,浸水对湿陷性黄土的桩侧摩阻力会产生很大的影响.
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| 关 键 词： | 湿陷性黄土 人工挖孔扩底长桩 静载试验 竖向承载性状 侧阻力 |
| 文章编号： | 1671-6833(2006)01-0040-04 |
| 修稿时间： | 2005-11-14 |
Vertical Bearing Behavior of Manually Excavated Belled Long Pile in Loess |
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| ZHAO Nan,LIU Zhong-yu. Vertical Bearing Behavior of Manually Excavated Belled Long Pile in Loess[J]. Journal of Zhengzhou University: Eng Sci, 2006, 27(1): 40-43 |
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| Authors: | ZHAO Nan LIU Zhong-yu |
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| Abstract: | The vertical bearing behavior of manually excavated belled long pile penetrating through the upper loess layer and ended in the saturated silty clay layer is studied by means of measuring the settlements on the top and tip of pile in the field static load tests.It is illustrated that the vertical bearing behavior of belled long pile is distinguished from that of belled short pile,and similar to that of belled supper-long pile embedded in loess layer,that is,the former belongs to the kind of end-bearing friction pile because its ultimate bearing capacity is predominated by its skin friction.In addition,it proves that the influence of the immersion on the skin friction of pile in the collapsible loess layer is remarkable. |
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| Keywords: | collapsible loess manually excavated belled long pile static load test vertical bearing behavior skin friction |
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