Field Tests of a Large-Span Metal Culvert

Abstract

Full-scale field tests were conducted on a 9.5-m (31-ft 2-in.) span low-profile arch culvert to provide input for development of improved large-span culvert load and resistance factor design specifications. The test structure was constructed of 5.5-mm (0.215-in.) thick black steel plate with 152 × 51 mm (6 × 2 in.) corrugations. No supplemental circumferential or longitudinal stiffeners were added. Two tests were conducted with SW backfill material, one each compacted to 87 and 92 percent of maximum standard Proctor density. Live-load tests were conducted with a truck with tandem axles loaded to 156 kN (35,000 lb) per axle at depths of fill of 0.3, 0.6, and 0.9 m (1, 2, and 3 ft). Measurements were made of culvert deformation, culvert strain, culvert-soil interface pressure, soil density, soil strain, foundation movement, and temperature. Thrusts and moments were determined from the culvert strain.