Relationship of friction and shear displacement along the depth of shaft-grouted mini-piles and a case study

C. Y. Kan; C. T. Wong; M. K. Leung

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Relationship of friction and shear displacement along the depth of shaft-grouted mini-piles and a case study

机译：沿竖向灌注桩桩深的摩擦与剪切位移的关系及实例研究

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In Hong Kong, piled foundations using shaft-grouted frictional piles have become more commonly adopted, in particular, for areas where bedrock can only be found at a very deep level. In the design aspect, there are various theoretical methods (e.g. α method, β method, Nottingham and Schmertmann cone penetration test method and N-value method) available to compute the design shaft friction; in situ measurements of the values of the shaft friction have also been carried out by numerous researchers to validate the design values. However, there is limited information on the correlation between the mobilised shaft friction and the shear displacement at the pile-soil interface. This paper presents the use of shaft-grouted frictional mini-piles founding on soil in a project of Architectural Services Department of the HKSAR Government. The load-tested results of two instrumented piles from that project followed by a discussion on the findings regarding the relationship between the mobilised shaft friction and the shear displacement of the pile-soil interface by both β and N-value methods are presented.

机译：在香港，使用竖井摩擦桩的桩基已经越来越普遍，尤其是在基岩深度很深的地区。在设计方面，可以使用多种理论方法（例如α方法，β方法，诺丁汉和Schmertmann锥入试验方法和N值方法）来计算设计轴摩擦力;许多研究人员还对轴摩擦值进行了现场测量，以验证设计值。但是，关于动轴摩擦与桩-土界面处的剪切位移之间的相关性的信息有限。本文介绍了在香港特别行政区政府建筑署的一个项目中在土壤中使用竖井灌浆的微型桩的应用。提出了该项目中的两个工具桩的载荷测试结果，然后讨论了通过β值法和N值法对动轴摩擦与桩-土界面的剪切位移之间关系的发现的讨论。

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《The HKIE Transactions》 |2013年第4期|共8页
作者
C. Y. Kan; C. T. Wong; M. K. Leung;
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正文语种 eng
中图分类一般工业技术;
关键词
Piled foundation; Shaft grouted; Shaft friction; Frictional mini-pile; Instrumented pile; Shear displacement;

机译：桩基;灌浆;桩身摩擦;摩擦微型桩;桩桩;剪切位移;

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机译：沿竖向灌注桩桩深的摩擦与剪切位移的关系及实例研究
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Relationship of friction and shear displacement along the depth of shaft-grouted mini-piles and a case study

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