Observed soil displacements above Rigid culverts

R.P. McAffee, A.J. Valsangkar, W.A. Take

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Buried Structures & Subsurface Systems

ABSTRACT: Centrifuge model tests were performed to observe soil displacements above twin rigid circular culverts. Positive projecting as well as induced trench culvert configurations were investigated. The experimental work utilized digital photography, particle image velocimetry (PIV), and close-range photogrammetry to track the deformations associated with positive and negative arching for induced trench and positive projecting construction. The data on soil deformations from twin culverts are compared with the data for a single culvert to investigate the effect of interactions of twin culverts on the deformation pattern. The configuration of compressible zones above twin culverts was varied to study the influence of this variable on the deformation behavior. The effect of friction mobilized along the boundaries of the centrifuge strong box on the deformation pattern is also discussed. The results indicate that the observed deformation patterns are significantly different than those typically assumed in simplified design procedures.

RÉSUMÉ: s associées -images de particules, et la photogrammétrie. Les données obtenues des essaient pour les ponceaux doubles furent comparéconfiguration de la zone compressible au-déplacement. Le frottement entre le sol et les murs de la centrifugeuse et son effet sur le déplacement du sol est aussi simple ou double.

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