[1]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(01):40-43.[doi:10.3969/j.issn.1671-6833.2006.01.010]
　ZHAO Nan,Liu Zhongyu.Analysis of vertical bearing characteristics of extended bottom long piles in loess[J].Journal of Zhengzhou University (Engineering Science),2006,27(01):40-43.[doi:10.3969/j.issn.1671-6833.2006.01.010]

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黄土中扩底长桩的竖向承载性状分析()

分享到：

《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

27

期数:

2006年01期

页码:

40-43

栏目:

出版日期:

1900-01-01

文章信息/Info

Title:

Analysis of vertical bearing characteristics of extended bottom long piles in loess

作者:

赵楠; 刘忠玉.

郑州大学土木工程学院,河南,郑州,450002, 郑州大学土木工程学院,河南,郑州,450002

Author(s):

ZHAO Nan; Liu Zhongyu

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

Keywords:

collapsible loess;  Manually digging holes and expanding long piles;  Static load test;  vertical bearing characteristics;  Side resistance

DOI:

10.3969/j.issn.1671-6833.2006.01.010

文献标志码:

A

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.

Abstract:

The on-site static load test was carried out on the manually dug hole and bottom-expanding long piles placed in the loess layer and supported in the silty clay layer, and the pile top settlement S and pile bottom settlement Sb under each stage of load were measured, and the vertical bearing characteristics of the extended bottom long piles were analyzed. It is pointed out that the stress mechanism of the extended long pile is obviously different from the short pile with the bottom expansion, and the bearing characteristics of the extended long pile placed in the loess layer are basically the same, and its ultimate bearing capacity is mainly based on side resistance, which has the characteristics of significant end-bearing friction pile. In addition, the experimental data show that water immersion will have a great influence on the pile side friction resistance of collapsible loess.

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