A hydraulic gradient similitude testing system for studying the responses of a laterally loaded pile and soil deformation

doi:10.1007/s12665-015-4998-y

	A hydraulic gradient similitude testing system for studying the responses of a laterally loaded pile and soil deformation
	Yuan, BX; Chen, R; Li, JH; Wang, YX; Chen, WW; Chen, R (reprint author), Harbin Inst Technol, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China.
刊名	ENVIRONMENTAL EARTH SCIENCES
	2016-01
卷号	75 期号:2
关键词	Ground deformation Soil displacement Pile deflection Hydraulic gradient similitude test Particle image velocimetry technique
ISSN号	1866-6280
DOI	10.1007/s12665-015-4998-y
文献子类	Article
英文摘要	In this study, a newly developed hydraulic gradient similitude (HGS) test and the particle image velocimetry (PIV) technique were applied to a laterally loaded pile to simultaneously measure the responses of a laterally loaded pile and sand displacement fields in a high-body force field. A comparison of the stages in the HGS test indicated that the lateral displacement of the loading point was doubled and that the applied load increased by 54 %. These results indicate that the rate of load increase gradually decreases with the increased displacement due to the plastic behavior of the soil. In addition, soil deformation increased as the lateral load increased, the soil behind the pile moved downwards because the resistance of the pile decreased, and the soil near the ground in front of the pile moved upwards because the movement of the pile caused the soil to resist lateral movement. The authors provide an additional model test for saturated soils under hydrostatic conditions (i.e., 1 g) to study the effects of the hydraulic gradient on the response of the pile and sand deformation. This comparison indicated that the lateral load in the HGS test was 4.2 times greater than that in the 1 g model test with a displacement of 3.82 mm times the loading point. In addition, the magnitudes of the deflection were smaller than those in the 1 g model test when the self-weight stress was increased 11 times. The passive influence zone in front of the pile in the 1 g model test was 50 % greater than that in the HGS test. In addition, the sand displacement around the pile in the 1 g model test was greater than that in the HGS test. The main reason for the abovementioned results are that the relative stiffness ratio between the soil and pile increased as the hydraulic gradient increased. Ultimately, this study shows that the PIV technique can be used to accurately measure soil displacement and represent pile deflection under different body forces. This study increases our understanding of the responses of soil to a laterally loaded pile and of soil deformation in a high-body force field. The results of this study demonstrate that the developed HGS device and the combination of the HGS and PIV techniques are suitable for solving soil-pile interaction problems.
学科主题	Environmental Sciences & Ecology ; Geology ; Water Resources
出版地	NEW YORK
资助项目	国家自然科学基金项目 ; 中国博士后科学基金
项目编号	Changjiang River Scientific Research Institute [CKWV2012310/KY] ; National Natural Science Foundation of China [51308164, 51304057] ; China Postdoctoral Science Foundation [2013M530157, 2014T70349]
语种	英语
WOS记录号	WOS:000370240800008
资助机构	NSFC ; CPSF
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/182487]
专题	土木工程与力学学院_期刊论文
通讯作者	Chen, R (reprint author), Harbin Inst Technol, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China.
推荐引用方式 GB/T 7714	Yuan, BX,Chen, R,Li, JH,et al. A hydraulic gradient similitude testing system for studying the responses of a laterally loaded pile and soil deformation[J]. ENVIRONMENTAL EARTH SCIENCES,2016,75(2).
APA	Yuan, BX,Chen, R,Li, JH,Wang, YX,Chen, WW,&Chen, R .(2016).A hydraulic gradient similitude testing system for studying the responses of a laterally loaded pile and soil deformation.ENVIRONMENTAL EARTH SCIENCES,75(2).
MLA	Yuan, BX,et al."A hydraulic gradient similitude testing system for studying the responses of a laterally loaded pile and soil deformation".ENVIRONMENTAL EARTH SCIENCES 75.2(2016).