Design of a T-Beam Bridge and Analysis of Subgrade Soil Strength

A bridge is a structure that provides passage over an obstacle without closing the way beneath. The required passage may be for a road, a railway, pedestrians, a canal or a pipeline. The obstacle to be crossed may be a river, a road, railway or a valley. For bridges of span larger than 12-15m and heavier loading, RCC construction is usually adopted. In case of RCC T-Beam bridge, for slab decks, the slab spans in two directions, since it is supported on longitudinal girders and cross beams at regular intervals. Hence the slab is designed as two way slab for various IRC Class Loadings. The deck slab is designed for IRC Class 70R wheeled vehicle and Longitudinal girders and cross beams are designed for two lanes of IRC Class A loading. Elastomeric Pad Bearing is provided as expansion bearing. Counter fort retaining wall is provided as abutment which is suitably checked for its stability. Piers of required height have been provided and checked for stability. For foundation pile foundation is adopted. Kerbs, footpath, and handrails are provided as per IRC 6:2000.