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- Title
Centrifuge testing and numerical analysis of box culverts installed in induced trenches.
- Authors
McGuigan, Benjamin L.; Valsangkar, Arun J.
- Abstract
Induced trench construction is routinely used for circular conduits, but its application for box culverts is less common. To understand the complex soil–structure interaction issues related to the design of induced trench box culverts, centrifuge tests were performed to measure earth pressures on a model box culvert installed in several induced trench configurations. These tests were modelled with FLAC and good agreement was achieved. A parametric study performed with FLAC identified a preferred compressible zone geometry having a width of 1.2 times the culvert width and a thickness of 0.5 times the culvert height. For this geometry, the earth pressure on the top was 0.28 times the overburden, the lateral earth pressure on the sides was 0.47 times the mid-height overburden, and the contact pressure at the base was 0.73 times the overburden plus the pressure from the dead load of the culvert. The average base contact pressures for the induced trench geometry were 35% lower than those for the corresponding positive projecting case. The induced trench method, therefore, appears to be a viable option for box culverts installed under high embankments.
- Subjects
CULVERTS; TRENCHES; EMBANKMENTS; BOX girder bridges; HYDRAULIC structures; CENTRIFUGATION; MODELING (Sculpture); HYDRODYNAMICS
- Publication
Canadian Geotechnical Journal, 2010, Vol 47, Issue 2, p147
- ISSN
0008-3674
- Publication type
Article
- DOI
10.1139/T09-085