Reinforcement construction method with soft foundation grouting in railway frame bridge jacking process

The invention discloses a reinforcement construction method with soft foundation grouting in a railway frame bridge jacking process. The method comprises the following steps of: reinforcing soft foundations positioned below station tracks on the two sides of a frame bridge to be jacked on a station yard and a main station track in the middle of the frame bridge by virtue of a slant pouring method; and reinforcing soft foundations positioned below branch station tracks in the middle of the station yard by virtue of a direct pouring method. In the railway frame bridge jacking process, the slant pouring method and the direct pouring method are combined for reinforcing the soft foundations under the railway frame bridge below the multiple station tracks; as the speed of vertical pouring is high, the time for reinforcing each station track is only about 48 hours, so that the construction period can be shortened substantially; and thus the reinforcement construction method is applicable to electrified railway construction, and causes least interference on the normal operation of a railway line.