Construction method for reserved post-grouting structure of road and bridge transition section

A construction method of a road and bridge transition section reserved post-grouting structure comprises the steps that sand gravel pits are reserved along the starting point, the middle portion and the tail portion of a bridge head transition slab; a group of grouting steel floral tubes are reserved in the middle and the tail of a transition slab respectively, each group of grouting round tubes are embedded in sand gravel grooves, reserved grouting open holes are formed in the position away from a curb zone, the sand gravel grooves are longitudinally formed in the middle and the tail of the abutment back wall and the transition slab for connection, and in order to prevent concrete cushion slurry from blocking sand pits, anti-seepage geomembranes are laid on the grooves, and sand gravel is backfilled in the grooves. Starting post-grouting when filling is completed for not less than 6 months or the vehicle bump is obviously felt; compared with traditional reinforcement protection, the method has the advantages