The invention belongs to the field of reconstruction construction of fabricated buildings and public buildings, and particularly relates to a disengagement type internal
force balance additional
awning reconstruction structure suitable for an existing
pedestrian overpass, which comprises a disengagement type additional space prestress tension
cable net awning structure; the overground tensioning internal
force balance structure is provided with an outer wrapping strengthening structure, a lateral force resisting transformation structure and a tensioning internal force cable-strut
system balance structure which are arranged on the basis of an existing
pier system. The outer wrapping strengthening structure is arranged on the existing
pier column, and the lateral force resistance transformation structure is connected to the outer wrapping strengthening structure of the existing
pier column. And the tensioning internal force cable-strut
system balance structure is connected between the lateral force resistance transformation structure and the disengagement type additional space prestress tensioning
cable net awning structure, and is configured to change the direction of the tensioning cable force of the upper disengagement type additional space prestress tensioning
cable net awning structure and transmit the tensioning cable force to the overground tensioning internal
force balance structure. The additional awning is separated from the existing bridge body, and additional influence is generated on the existing bridge body structure.