石英砂地基中X截面混凝土桩筏基础的竖向承载力模型试验(英文)
发布时间:2021-05-28 15:10
为了揭示X截面桩筏基础在石英砂中的承载能力,将X截面桩与同截面积的圆形桩进行对比研究,开展了一系列模型试验。研究内容包括X截面桩筏基础的荷载-沉降曲线、轴力和摩阻力、X截面桩凹凸边缘的应变分析、桩-土应力比、桩侧阻力和端部承载力的分布。结果表明:X截面桩筏基础的承载力远远大于圆形桩筏基础的承载力。筏板下的X截面桩轴力峰值比圆形桩的轴力峰值小且位置更深;因而,中性点位置也比圆形桩更深。此外,X截面桩的凹缘处应变远大于凸缘处,且随着荷载的增大,凸缘处具有更大的承载力潜能。与圆截面桩相比,X截面桩具有更高的桩-土应力比,更大的侧阻力与端阻力荷载分担比。因此,X截面桩可以显著提高砂土中桩筏基础的承载力。
【文章来源】:Journal of Central South University. 2020,27(06)EISCICSCD
【文章页数】:9 页
【文章目录】:
1 Introduction
2 Model tests
2.1 Model test equipment
2.2 Model pile and sand
3 Model test results and discussion
3.1 P-S curves of circular and X-section concrete pile raft foundation
3.2 Influence of pile numbers on P-S curves
3.3 Axial force and skin friction
3.4 Strain on concave and convex edge of X-section concrete pile
3.5 Pile-sand stress ratio and load-sharing
3.6 Distributions of side and tip resistance
4 Conclusions
【参考文献】:
期刊论文
[1]石灰加固贝宁(西非)土的性能及滑坡防控(英文)[J]. Quirin Engelbert Ayeditan ALAYE,LING Xian-zhang,Yvette Sèdjro KIKI TANKPINOU,Marx Ferdinand AHLINHAN,LUO Jun,Michel Hadilou ALAYE. Journal of Central South University. 2019(11)
[2]石柱与颗粒覆盖增强土壤的实验研究(英文)[J]. Nima MEHRANNIA,Farzin KALANTARY,Navid GANJIAN. Journal of Central South University. 2018(04)
[3]Numerical simulation on behavior of pile foundations under cyclic axial loads[J]. 赵明华,衡帅,郑玥. Journal of Central South University. 2017(12)
[4]现浇X形混凝土桩竖向承载特性试验及其极限承载力预测[J]. 张敏霞,丁选明,陈育民. 煤炭学报. 2011(02)
[5]现浇X形桩竖向承载特性足尺模型试验研究[J]. 王智强,刘汉龙,张敏霞,袁佶,雍君. 岩土工程学报. 2010(06)
本文编号:3208271
【文章来源】:Journal of Central South University. 2020,27(06)EISCICSCD
【文章页数】:9 页
【文章目录】:
1 Introduction
2 Model tests
2.1 Model test equipment
2.2 Model pile and sand
3 Model test results and discussion
3.1 P-S curves of circular and X-section concrete pile raft foundation
3.2 Influence of pile numbers on P-S curves
3.3 Axial force and skin friction
3.4 Strain on concave and convex edge of X-section concrete pile
3.5 Pile-sand stress ratio and load-sharing
3.6 Distributions of side and tip resistance
4 Conclusions
【参考文献】:
期刊论文
[1]石灰加固贝宁(西非)土的性能及滑坡防控(英文)[J]. Quirin Engelbert Ayeditan ALAYE,LING Xian-zhang,Yvette Sèdjro KIKI TANKPINOU,Marx Ferdinand AHLINHAN,LUO Jun,Michel Hadilou ALAYE. Journal of Central South University. 2019(11)
[2]石柱与颗粒覆盖增强土壤的实验研究(英文)[J]. Nima MEHRANNIA,Farzin KALANTARY,Navid GANJIAN. Journal of Central South University. 2018(04)
[3]Numerical simulation on behavior of pile foundations under cyclic axial loads[J]. 赵明华,衡帅,郑玥. Journal of Central South University. 2017(12)
[4]现浇X形混凝土桩竖向承载特性试验及其极限承载力预测[J]. 张敏霞,丁选明,陈育民. 煤炭学报. 2011(02)
[5]现浇X形桩竖向承载特性足尺模型试验研究[J]. 王智强,刘汉龙,张敏霞,袁佶,雍君. 岩土工程学报. 2010(06)
本文编号:3208271
本文链接:https://www.wllwen.com/guanlilunwen/chengjian/3208271.html