Experimental study of pile group in sand under compressive and tensile loadings

GAO Zhi-yao; ZHAO Peng; QI Ming-zhu; LI Jin-hui; SU Dong

doi:10.16285/j.rsm.2015.S2.059

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Experimental study of pile group in sand under compressive and tensile loadings

更新时间：2026-06-25

- Experimental study of pile group in sand under compressive and tensile loadings
- Vol. 36, Issue S2, Pages: 419-423(2015)
- 作者机构：
  
  1. 深圳大学土木工程学院,广东,深圳,518060
  2. 中国市政工程中南设计研究总院有限公司,湖北,武汉,430010
  3. 招商局蛇口工业区有限公司,广东,深圳,518067
  4. 哈尔滨工业大学深圳研究生院,广东,深圳,518055
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2015.S2.059
  CLC： TU473
- Online First：14 June 2018，
  
  Published：2015
- 稿件说明：
移动端阅览
GAO Zhi-yao, ZHAO Peng, QI Ming-zhu, et al. Experimental study of pile group in sand under compressive and tensile loadings[J]. 2015, 36(S2): 419-423.
DOI：

GAO Zhi-yao, ZHAO Peng, QI Ming-zhu, et al. Experimental study of pile group in sand under compressive and tensile loadings[J]. 2015, 36(S2): 419-423. DOI： 10.16285/j.rsm.2015.S2.059.

摘要

进行砂土的单桩和2×2群桩的压、拔试验，测定桩身轴力、桩顶荷载、位移以及桩端阻力。试验研究结果表明，群桩的抗压群桩效应系数 >1，最优桩间距为4D(D为直径)，对应的约为1.2；桩端阻力群桩效应系数大于桩侧摩阻力群桩效应系数，其最优桩间距为5D，对应的值约为1.3；桩侧摩阻力群桩效应系数在3D时约为1.2，但随桩间距的增大而减小。与前人理论分析的结果不同，由于砂土的挤密效应，试验测得抗拔群桩效应系数也大于1，最优桩间距在4D～5D之间，系数约为1.2。桩间距为7D时压、拔群桩效应系数均趋近于1，可基本忽略群桩效应。

Abstract

Model tests have been conducted on a single pile and pile group in sand under both compressive and tensile loadings. Axial forces

loads and displacements at the pile head

and pile tip resistance were measured. Experimental results show that the compressive group pile effect coefficient ? is greater than 1. The optimal pile spacing is 4D(D is pile diameter)

at which η is about 1.2. The pile tip resistance coefficient is greater than the lateral friction coefficient . The pile tip resistance coefficient reaches maximum at the spacing of 5D with a value of about 1.3. The lateral friction coefficient is about 1.2 at pile spacing of 3D

but it decreases with the increasing of pile spacing. Different from the results revealed by previous theoretical analysis

the test results show that the pullout group effect coefficient is greater than 1

due to sand densification during pile driving. The optimal pile spacing is between 4D-5D

with a maximum coefficient of about 1.2. The group coefficient is close to 1 when the pile spacing is greater than 7D and the group pile effect can be ignored.

关键词

Keywords

references

Views

242

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Model tests on effect of slopes on lateral resistance of near single piles in sand

Study of model test of uplift and compression piles in sand

Prediction method for load-settlement response of a single pile in sand based on an interface constitutive model

Sealing system design and model testing of lining structures for artificial underground gas storage caverns in medium-hard rock strata

Calculation method of sliding surface stress based on segmented sliding surface stress measurement system

Related Author

GAO Bo-lei

ZHANG Chen-rong

ZHANG Zhao-xu

CHEN Xiao-qiang

ZHAO Chun-feng

GAN Ai-ming

ZHOU Pan

LI Jing-pei

Related Institution

Department of Geotechnical Engineering, Tongji University

Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University

PetroChina West-East Gas Pipeline Company

Institute of Geotechnical Engineering, Southeast University

School of Highway, Chang’an University

AI问答

⁰