Reinforcing structure and reinforcing method for lifting bridge deck cantilever slab

The invention relates to a reinforcing structure and a reinforcing method for lifting a bridge deck cantilever slab. The bridge floor cantilever slab comprises an end part for fixing the bridge floorcantilever slab of a newly-built guardrail and a root part of the bridge floor cantilever slab, the reinforcing structure comprises a combined steel component extending from the end of the bridge floor cantilever slab to the root of the bridge floor cantilever slab, and the combined steel members comprise at least two transverse combined steel members connected with the bridge deck cantilever slaband the newly-built guardrail and longitudinal perforated steel plates for connecting the transverse combined steel members. Compared with the prior art, the reinforcing structure of the bridge deckcantilever slab based on the improvement of the bridge guardrail anti-collision grade, while the guardrail anti-collision capacity is improved, the bridge deck cantilever slab is reinforced through the combined steel components