桩端刺入的离心机试验研究

周健; 王强强; 郭建军

doi:10.13204/j.gyjz201208016

桩端刺入的离心机试验研究

doi: 10.13204/j.gyjz201208016

周健^1,2,
王强强^1,2,
郭建军³

1.
1 同济大学地下建筑与工程系上海 200092;
2.
2 同济大学岩土及地下工程教育部重点试验室上海 200092;
3.
3 四川省川建勘察设计院成都 610017

基金项目:

高校博士点专项科研基金资助项目(200802470007)

详细信息

作者简介:
周健，男，1957年出生，博士，教授，博士生导师。E-mail:tjuzj@vip.163.com

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- 文章访问数: 63
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- 被引次数: 0
出版历程
- 收稿日期: 2012-02-28
- 刊出日期: 2012-08-20

CENTRIFUGE TEST ON PENETRATION OF PILE TIP

1.
1. Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;
2.
2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China;
3.
3. Sichuan Provincial Chuanjian Investigation and Design Institute,Chengdu 610017,China

摘要

摘要: 采用可视化模型箱,进行桩端刺入离心模型试验。考虑纯砂土、分层介质两种土体情况,研究上覆软弱夹层对桩端刺入的桩侧摩阻力和桩端阻力的发挥性状及阻力随沉降的发展模式的影响。试验表明:分层介质中达到极限桩端阻力所需的桩端刺入量约为纯砂土中的一半,且当桩土相对位移很小时,桩端附近的土体的横向位移和沿深部方向的影响范围基本形成,桩端砂土有比较明显的椭球孔形扩张态势。
- 桩基工程 /
- 桩端刺入 /
- 分层介质 /
- 离心机试验
Abstract: It was investigated the impact of upper weak layer on the behavior of skin friction resistance and pile-tipresistance during pile penetration．Centrifugal tests were carried out to model pile penetration in a uniform sandyground and a layered ground using a visible soil container．The experimental results showed that the requiredpenetration to mobilize the maximum tip resistance in the layered ground was about half of that in the uniform sandyground．The lateral displacement of the soil adjacent to the tip was stabilized as well as the influencing depth, whenthe pile-soil relative displacement was still very small．The sand near the tip exhibited remarkable expansion formingan ellipsoidal hole．
- pile foundations /
- pile tip penetration /
- stratified media /
- centrifuge test

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参考文献(10)

宰金珉.塑性支承桩卸荷减沉桩的概念及其工程应用[J].岩土工程学报,2001,23(3):273-278.

[2] 王浩,周健,邓志辉.砂土中桩端阻力随位移发挥的内在机制研究[J].岩土工程学报,2006,28(5):587-593.

[3] 王浩,周健,邓志辉.桩-土-承台共同作用的模型试验研究[J].岩土工程学报,2006,28(10):1253-1258.

[4] 叶建忠,周健,韩冰.基于离散元理论的静压沉桩过程颗粒流数值模拟[J].岩石力学与工程学报,2007,26(S1):3058-3064.

[5] 叶建忠,周健,韩冰.考虑不同成桩方式单桩特性的颗粒流数值模拟[J].岩土工程学报,2007,29(6):894-900.

[6] Guerrero S L,Vallejo L E.Influence of Pile Shape and PileInteraction on the Crushable Behavior of Granular MaterialsAround Driven Piles:DEM Analyses[J].Granular Matter,2007,9(3/4):241-250.

[7] Craig W H.Simulation of Foundations for Offshore StructuresUsing Centrifuge Modeling[G]∥Developments in Soil Mechanicsand Foundation.Engineering-Model Studies.London:AppliedScience Publishers Ltd,1983:1-27.

[8] Ovesen N K.The Use of Physical Models in Design:the ScalingLaw Relationship[C]∥Proceedings of the 7th EuropeanConference on Soil Mechanics and Foundation Engineering.Brighton,England:1979,4:318-323.

[9] 贺炜.竖向荷载下基桩承载性状的理论与试验研究[D].长沙:湖南大学,2007.

[10] Jenck O,Dias D,Kastner R.Two-Dimensional Physical andNumerical Modeling of a Pile-Supported Earth Platform over SoftSoil[J].Journal of Geotechnical and GeoenvironmentalEngineering,2007,133(3):295-305.

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