DX桩承力盘抗拔阻力的分析与研究

李广信; 汤飞

doi:10.13204/j.gyjz200506015

DX桩承力盘抗拔阻力的分析与研究

doi: 10.13204/j.gyjz200506015

李广信,
汤飞

1.
清华大学水利水电工程系北京100084

基金项目:

国家自然科学基金资助项目（批准号：50279014）

详细信息

作者简介:
李广信，男，1941年10月出生，博士，教授，博士生导师

中图分类号: TU473.11
计量
- 文章访问数: 57
- HTML全文浏览量: 9
- PDF下载量: 118
- 被引次数: 0
出版历程
- 收稿日期: 2005-01-20
- 刊出日期: 2005-06-20

ANALYSIS AND RESEARCH OF TENSILE RESISTANCE FOR LOAD-CARRYING PLATE OF DX PILE

1.
Department of Water Resources and Hydropowe r Engineering,Tsinghua University Beijing 100084

摘要

摘要: DX单桩的抗拔阻力不但源于桩身的摩阻力，其承力盘(岔)的阻力也是不可忽视的部分。对于桩身的抗拔摩阻力的研究有不少成果，在有关规范中也规定了折减系数。而各种扩底桩和支盘(岔)桩的抗拔端阻力研究较少，也缺少必要的试验资料。提出和检验了几种抗拔端阻力的分析计算方法，并与竖向受压的端阻力进行比较，且分析了一些试验结果，以期探讨DX桩的承力盘的抗拔承载力的设计计算方法。研究表明，DX桩承力盘拉拔的破坏形式及端阻力与桩周土的性质有关，与承力盘的尺寸和埋深等因素有关;一般讲，它明显小于受压桩的端阻力，其折减系数约为0.3～0.4。
- DX桩 /
- 拉拔桩 /
- 端阻力 /
- 承力盘
Abstract: The resistance of tension DX pile consists of the frictional resistance of pile shaft and the resistance of loadcarryingplate. In comparison with the frictional resistance in tension pile, the latter is studied very little both in theory and inexperiment. Several calculation methods of tension resistance of the plate are proposed or identified. The compressive endresistance and tensile resistances of the plate are compared with each other. A few experimental results are analyzed on thebasis of the above calculations. It is found that the failure mode and the resistance of the plate of tension DX pile are relatedwith soil property, the size and depth of the plate. Generally, tensile resistance of the plate is less than compressive oneconsiderably, and the reduction factor is about 0.3~ 0.4.
- DX pile /
- tension pile /
- end resistance /
- load-carrying plate