Comparative Study of Box Culvert With and Without Haunches

Abstract

Box culverts consisting of two horizontal and two vertical slabs built monolithically are ideally suited for a road or a railway bridge crossing with high embankments crossing a stream with a limited flow. Reinforced concrete rigid frame box culverts with square or rectangular openings are used upto spans of 4m. The height of the vent generally does not exceed 3m.If the discharge in a drain or channel crossing a road is small, and if the bearing capacity of the soil is low, then a box culvert is an ideal bridge structure. Recent software developments have made possible the use of Moment Distribution Method and Finite element methods for 3D modeling. Several works have already been done on analysis and design of Box Culverts. In the past study of box culverts, effect of haunch has not been considered in the reduction of Shear Force and Bending Moment in Box Culvert resulting in reduction of Shear Stress which leads to more efficient Box Culvert design.