楔形与等截面静压桩沉桩贯入阻力对比研究

杨庆光; 刘杰; 何杰; 罗善煌

楔形与等截面静压桩沉桩贯入阻力对比研究 English Version

湖南工业大学土木工程学院，湖南株洲 412007

基金项目: 国家自然科学基金项目（51078140，51208194）

详细信息

作者简介:
杨庆光(1979- )，男，江西黎川人，博士，副教授，主要从事桩土相互作用理论等方面的教学与研究工作。E-mail: yqg1210@126.com。

中图分类号: TU443
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出版历程
- 收稿日期: 2012-07-03
- 发布日期: 2013-05-26

Comparative research on penetration resistance of jacked tapered piles and uniform section piles

College of Civil Engineering, Hunan University of Technology, Zhuzhou 412007, China

摘要

摘要: 基于Vesic圆孔扩张理论，考虑贯入深度对扩孔压力的影响，得到了一种扩孔压力的迭代算法；在此基础上，分析了楔形与等截面静压桩沉桩贯入阻力的差异性，并考虑极限滑动摩阻力的影响，建立了两种桩型的静压沉桩贯入阻力计算公式。为了验证该方法的可行性，对楔形与等截面桩进行模型对比试验，并利用该方法对模型试验进行计算分析，试验及理论结果均表明，等截面桩沉桩贯入阻力在贯入初期上升较快，后期上升缓慢，而楔形桩整个沉桩过程贯入阻力始终保持稳步增长。同时，等截面桩最终沉桩贯入阻力要比平均截面半径相等的楔形桩贯入阻力小得多，说明在相同贯入阻力前提下，采用楔形桩将能大幅度减少桩身材料，降低成本。
- 楔形静压桩 /
- 等截面静压桩 /
- 贯入阻力
Abstract: Based on the cavity expansion theory of Vesicc and the effect of penetration depth on expansion pressure, an iterative algorithm is developed for expansion pressure. By analyzing the differences between taperd piles and uniform section piles in view of penetration resistance, condidering the utmost sliding friction betweem piles and soil, a method for the penetration resistance of both types of jacked piles is deduced. In order to validate the feasibility of the proposed approach, laboratory model tests on penetration of traped piles and uniform section piles are performed. The above method is used to analyze them. The test and theoretical results indicate that the penetration resistance of uniform section piles rises rapidly at the primary stage and slowly at the later stage, and that of traped piles steadily increases during the entire stage of penetration. The final penetration resistance of uniform section piles is much smaller than that of taperd piles which have equal average section radius with uniform section piles. The traped piles may save costs of materials and reduce their consumption.
- jacked tapered piles /
- uniform section jacked piles /
- penetration resistance

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参考文献(13)

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