The invention discloses a
system reinforcing method for a steel plate combined
continuous beam. The
system reinforcing method comprises the steps that a temporary support is erected near a
bending moment zero point of the combined beam; secondly, the composite beam is jacked for the first time, a
support system on a cover beam of the middle
pier is removed, and damaged concrete of a
bridge deck ina
hogging moment area of the top of the middle
pier is chiseled away; then, secondary jacking is conducted, a prefabricated channel beam is hoisted to be installed on the middle
pier cover beam, andthe upper
flange of the prefabricated channel beam is connected with the lower
flange of an H-
shaped beam in a welded mode; meanwhile, longitudinal ribs and vertical ribs are implanted into the middlepier cover beam, and studs are welded to the inner side of a steel web of the H-
shaped beam; finally, concrete is poured, the temporary support is dismantled, and construction is completed. On one hand, the
bearing capacity and torsional
distortion resistance of the steel plate combined
continuous beam can be greatly improved, on the other hand, the problem of
bridge deck slab
cracking in the
hogging moment area of the steel plate combined
continuous beam can be effectively solved, and the purpose of reinforcing an existing steel plate combined continuous
beam system is achieved.