| 湿陷性黄土场地PHC桩竖向承载性状试验研究 |
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| 引用本文： | 刘争宏,郑建国,于永堂. 湿陷性黄土场地PHC桩竖向承载性状试验研究[J]. 岩土工程学报, 2010, 0(Z2) |
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| 作者姓名： | 刘争宏 郑建国 于永堂 |
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| 作者单位： | 机械工业勘察设计研究院; |
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| 摘 要： | 研发了一种PHC管桩内力测试方法,应用该方法对湿陷性黄土场地中PHC管桩分天然和浸水工况进行了载荷试验过程中的内力测试,研究了湿陷性黄土地基中PHC管桩的承载力性状和侧阻力分布规律。结果表明:干黄土中的多节PHC桩,浅部桩体的侧阻力存在发挥不佳的可能,该情况下土体浸水也不能有效提高侧摩阻力,同时桩周土自重湿陷沉降在桩侧产生的负摩阻力也较小;下部桩体侧阻力随深度的分布曲线呈单峰状,峰值深度随荷载增大逐渐向下移动;黄土与古土壤互层地层结构中的PHC管桩,在极限荷载作用下桩身压缩量是构成总沉降量的主要部分。
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| 关 键 词： | PHC桩 内力测试 湿陷性黄土 承载性状 |
Vertical bearing behaviors of PHC piles in collapsible loess |
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| LIU Zheng-hong,ZHENG Jian-guo,YU Yong-tang. Vertical bearing behaviors of PHC piles in collapsible loess[J]. Chinese Journal of Geotechnical Engineering, 2010, 0(Z2) |
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| Authors: | LIU Zheng-hong ZHENG Jian-guo YU Yong-tang |
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| Abstract: | A technology for stress tests on PHC tubular piles is developed,and is applied in vertical static loading tests on PHC piles in collapsible loess.Based on the tests,bearing capacity and skin friction distribution rules of PHC piles in collapsible loess with natural and soaked soil conditions are studied.The test results show that if PHC piles consist of several segments,the skin friction of the upper part of the piles may be lower when the soil around the piles is dry loess,in this case,the skin friction ca... |
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| Keywords: | PHC pile stress test collapsible loess bearing behavior |
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