Haolebaoji-Ji’an Railway is a newly built double track electrified heavy haul railway with a total length of 1 814.33 km

in which 17 900 simply supported beams are used. On account of the huge number of beams

the structural design of simply supported beams has significant impact on the construction period and cost of the whole line. This paper briefly introduces the design and some optimization measures of the post-tensioned prestressed concrete simply supported T-beam of Haolebaoji-Ji’an Railway. The structural design meets the requirements of heavy haul railway. For the first time

the composite structure

composed of I-shaped steel beam

concrete U-shaped groove and RPC cover plate

is adopted in the sidewalk

which provides convenient conditions for the laying and maintenance of cables and the setting of sound barrier. The width of sidewalk is widened

refuge platform is cancelled

and water retaining platform and steel cover plate are used for waterproof and drainage of beam end. The optimization measures reduce construction difficulty and project cost

which has certain reference significance for the design of simply supported beam of heavy haul railway and mixed passenger and freight railway.