Analysis of vertical bearing mechanism of large-diameter 
tubular pile using cast-in-situ concrete

WANG Zhe; DING Zhou-xiang; YANG Yu-ren

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Analysis of vertical bearing mechanism of large-diameter tubular pile using cast-in-situ concrete

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- Analysis of vertical bearing mechanism of large-diameter tubular pile using cast-in-situ concrete
- Vol. 27, Issue S1, (2006)
- 作者机构：
  
  1. 浙江工业大学岩土工程研究所,杭州,310024
  2. 同济大学岩土工程研究所,上海,200092
  3. 浙江工业大学之江学院,杭州,310024
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU473
- Online First：15 December 2006，
  
  Published：2006
- 稿件说明：
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WANG Zhe, DING Zhou-xiang, YANG Yu-ren. Analysis of vertical bearing mechanism of large-diameter tubular pile using cast-in-situ concrete[J]. 2006, 27(S1).
DOI：

WANG Zhe, DING Zhou-xiang, YANG Yu-ren. Analysis of vertical bearing mechanism of large-diameter tubular pile using cast-in-situ concrete[J]. 2006, 27(S1). DOI：

摘要

筒桩土芯性状复杂，而筒桩承载力计算还不成熟。分别对黏性土层和砂性土层中筒桩土芯承载机理进行了比较分析，认为土芯与筒桩存在相对位移趋势，相对位移的发生是筒桩内侧摩阻力产生的原因，得到了土芯内摩阻力及土芯端部承担荷载计算公式。黏性土层中土芯承载作用较小，而砂性土层中由于土芯闭塞效应承载作用大大加强，得到了单桩竖向极限承载力的简化计算公式。最后通过工程实例验证了该公式的实用性。

Abstract

Owing to complexity of soil core’s characteristic

the calculation of tubular pile’s bearing capacity isn’t mature. Two kinds of bearing mechanism in clay and in sand are compared. The reason how inner friction appears is that relative displacement or the trend of it exists between the soil core and pile

depending on which the calculation method of the inside friction and of the bearing capacity of soil core top are settled. The conclusion is that the contribution to bearing of inner friction is little in clay and is large in sand for the obstruction effect. At last

predigested calculation formula of vertical bearing capacity of tubular pile is established

Case study are given to validate the method.

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