Soil deformation measurement using particle image velocimetry (PIV) and photogrammetry

Geotechnique - Tập 53 Số 7 - Trang 619-631 - 2003
David White1, W. Andy Take1, M. D. Bolton1
1The Schofield Centre, Cambridge University Engineering Department UK

Tóm tắt

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 measurement points that can be fitted in an image. The performance of the system is illustrated with two example applications.

Từ khóa


Tài liệu tham khảo

Abdel-Aziz Y. I., 1971, Proceedings of the symposium on close-range photogrammetry, 1, 1

10.1146/annurev.fl.23.010191.001401

10.1111/0031-868X.00141

10.1680/geot.1973.23.4.571

10.1680/geot.1970.20.3.308

10.1109/ICPR.1996.546012

10.1109/CVPR.1997.609468

10.1520/GTJ11130J

Phillips R., 1991, Film measurement machine user manual

Roscoe K. H., 1963, Civ. Engng Public Works Rev., 58, 873

10.1520/GTJ10318J

Slama C. C., 1980, Manual of photogrammetry, 4

Take W. A. The influence of seasonal moisture cycles on clay slopes. PhD dissertation, 2003, University of Cambridge.

Taylor R. N., 1998, Proc. Centrifuge '98, 73

White D. J. An investigation into the behaviour of pressed-in piles. PhD dissertation, 2002, University of Cambridge.

Thông tin
Thông tin xuất bản

Geotechnique

Tập 53 Số 7

619-631

Thông tin tác giả