Journal ArticleDOI
Soil deformation measurement using particle image velocimetry (PIV) and photogrammetry
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A deformation measurement system based on particle image velocimetry (PIV) and close-range photogrammetry has been developed for use in geotechnical testing as mentioned in this paper.Abstract:
A deformation measurement system based on particle image velocimetry (PIV) and close-range photogrammetry has been developed for use in geotechnical testing. In this paper, the theory underlying this system is described, and the performance is validated. Digital photography is used to capture images of planar soil deformation. Using PIV, the movement of a fine mesh of soil patches is measured to a high precision. Since PIV operates on the image texture, intrusive target markers need not be installed in the observed soil. The resulting displacement vectors are converted from image space to object space using a photogrammetric transformation. A series of validation experiments are reported. These demonstrate that the precision, accuracy and resolution of the system are an order of magnitude higher than previous image-based deformation methods, and are comparable to local instrumentation used in element testing. This performance is achieved concurrent with an order of magnitude increase in the number of meas...read more
Citations
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Journal ArticleDOI
Centrifuge Model Test on the Performance of Geogrid-Reinforced and Pile-Supported Embankment Over Soft Soil
TL;DR: In this paper, the deformation and failure mode of a geogrid-reinforced and pile-supported (GRPS) embankment was investigated using the incremental acceleration method.
Development and Assessment of Transparent Soil and Particle Image Velocimetry in Dynamic Soil-Structure Interaction
TL;DR: In this paper, a neural network-based camera calibration algorithm was developed for the Particle Image Velocimetry (PIV) and transparent soil to investigate the dynamic rigid block and soil interaction.
Book ChapterDOI
Susceptibility of Shallow Foundation to Rocking and Sliding Movements During Seismic Loading
TL;DR: In this article, the authors examined how structural stiffness, aspect ratio, soil relative density and earthquake magnitude affect the level of rotation and sliding experienced by a shallow foundation during seismic loading.
Dissertation
The effect of forepole reinforcement on tunnelling-induced movements in clay
TL;DR: In this article, the effects of a Forepoling Umbrella System (FUS) are investigated to reduce ground movements induced by tunnelling, and the relative effect of the system parameters is investigated to gain a clearer insight into achieving an optimal design.
Journal ArticleDOI
Reliability verification of a vision-based dynamic displacement measurement for system identification
Hongjin Kim,Seung-Hoon Shin +1 more
TL;DR: It was determined that the accuracy of dynamic displacement measurement by the camcorder in the vision-based system is affected by the frequency of the measurement object.
References
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Journal ArticleDOI
Particle-Imaging Techniques for Experimental Fluid Mechanics
TL;DR: A review of these methods can be found in articles by Lauterborn & Vogel (1984), Adrian (1986a), Hesselink (1988), and Dudderar et al..
Proceedings ArticleDOI
A four-step camera calibration procedure with implicit image correction
Janne Heikkilä,Olli Silven +1 more
TL;DR: This paper presents a four-step calibration procedure that is an extension to the two-step method, and a linear method for solving the parameters of the inverse model is presented.
Proceedings ArticleDOI
Calibration procedure for short focal length off-the-shelf CCD cameras
Janne Heikkilä,Olli Silven +1 more
TL;DR: A camera calibration procedure intended for a 3D measurement application is presented, paying attention to the various error sources, and notices that a more complete camera model is needed to explain all the error components.
Journal ArticleDOI
A review of instrumentation for measuring small strains during triaxial testing of soil specimens
TL;DR: In this article, the authors present a survey of small-strain measuring devices and their modes of operation, benefits, capabilities, and limitations, as well as a classification of internal and external measuring devices.