Segmented pouring joint structure of steel-ultra-high performance concrete combined bridge deck slab and construction method of segmented pouring joint structure

The invention relates to a steel-ultra-high performance concrete combined bridge deck slab segmented pouring joint structure and a construction method thereof, and the steel-ultra-high performance concrete combined bridge deck slab segmented pouring joint structure comprises a steel bridge deck slab, an ultra-high performance concrete layer, a reinforcing mesh and a bridge deck pavement layer, the ultra-high-performance concrete layer comprises a first-pouring ultra-high-performance concrete layer and a second-pouring ultra-high-performance concrete layer, a joint is formed between the first-pouring ultra-high-performance concrete layer and the second-pouring ultra-high-performance concrete layer, and a reinforcing mesh and a steel fiber grid are sequentially laid at the joint and wrapped by the ultra-high-performance concrete layer. And a bridge deck pavement layer is paved above the ultra-high performance concrete layer. The fiber grids are laid at the joint interface of the ultrahigh concrete, the tensile