Measurement on soil deformation caused by expanded-base pile in transparent soil using particle image velocimetry (PIV)

doi:10.1007/s11629-016-4025-0

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2017 > Vol14 No.8

	Measurement on soil deformation caused by expanded-base pile in transparent soil using particle image velocimetry (PIV)
	QI Chang-guang; ZHENG Jin-hui; ZUO Dian-jun; CHEN Geng
刊名	Journal of Mountain Science
	2017-08
卷号	14 期号:8 页码:1655-1665
关键词	Geotechnical Physical Model Expanded-base Pile Transparent Soil Particle Image Velocimetry (Piv) Close-range Photogrammetry
ISSN号	1672-6316
DOI	10.1007/s11629-016-4025-0
通讯作者	QI Chang-guang
文献子类	期刊论文
英文摘要	A new small-scale geotechnical physical model in 1-g and unconfined condition, combining the transparent soil, close-range photogrammetry and particle image velocimetry (PIV), was employed, which provides a non-intrusively internal deformation measurement approach to monitor the internal deformation of soil caused by expanded-base pile jacking with casing. The transparent soil was made of fused quartz and its refractive index matched blended oil, adding reflective particles (glass beads). Close-range photogrammetry was employed to record the images of the process of casing jacking and extraction in transparent soil, allowing the use of Matlab-based Geo-PIV to figure out the displacement field converted from image space to object space. Analysis of test results indicates that the maximum displacement caused by casing jacking for expanded-conical-base pile is decreased by 29% compared with that for expanded-flat-base pile. The main movement happens at the early stage of casing extraction. The maximum displacement caused by casing extraction for the conical base is about 43% of that for the flat base, while the affected zone caused by casing extraction for the conical base accountsfor about 1/3 of that for the flat base. The contraction for horizontal displacements tends to decrease with the depth increasing. By contrast, the contraction under pile base decreases with the increasing of displacement. The displacements generated by jacking a conventional pile having a diameter equal to the casing diameter of the expanded-base pile were comparable to the net displacement taking place due to expanded-base pile installation for the conical base pile.
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/18953]
专题	Journal of Mountain Science _Journal of Mountain Science-2017_Vol14 No.8
推荐引用方式 GB/T 7714	QI Chang-guang,ZHENG Jin-hui,ZUO Dian-jun,et al. Measurement on soil deformation caused by expanded-base pile in transparent soil using particle image velocimetry (PIV)[J]. Journal of Mountain Science,2017,14(8):1655-1665.
APA	QI Chang-guang,ZHENG Jin-hui,ZUO Dian-jun,&CHEN Geng.(2017).Measurement on soil deformation caused by expanded-base pile in transparent soil using particle image velocimetry (PIV).Journal of Mountain Science,14(8),1655-1665.
MLA	QI Chang-guang,et al."Measurement on soil deformation caused by expanded-base pile in transparent soil using particle image velocimetry (PIV)".Journal of Mountain Science 14.8(2017):1655-1665.