Access structure in improved generation floor

The utility model discloses an access structure in improved generation floor, floor middle section piece wholly is long cubic, the middle part forms passageway portion along vertical arch, control both sides and install the limit along horizontal formation connection, the upper surface of passageway portion covers installs well passageway reinforcement, well passageway reinforcement is the same with the shape of passageway portion, well passageway reinforcement and the laminating fixed connection of passageway portion, the lower surface of passageway portion is along vertically being provided with preceding floor rear frame member and the well passageway stiffening beam that is parallel to each other side by side, preceding floor rear frame member and well passageway stiffening beam all front and back are high protruding, it is middle sunken, longitudinal section is " nearly " font, preceding floor rear frame member and well passageway stiffening beam are fixed with the lower surface laminating of passageway