Post-reinforcement construction process for groove walls outside side walls of guide walls after implementation on guide walls of ground walls

The invention relates to a post-reinforcement construction process for groove walls outside the side walls of guide walls after implementation on the guide walls of ground walls. The post-reinforcement construction process includes steps of forming lead holes in wing plates of the guide walls; driving high-pressure jet grouting piles with certain depths in the holes; carrying out high-pressure jetgrouting; improving soil mass of the groove walls by the aid of the high-pressure jet grouting piles to achieve the purpose of reinforcing the groove walls. The post-reinforcement construction process has the advantages that the strength of upper-layer soil mass of the ground walls can be effectively improved by the aid of the post-reinforcement construction process after the guide walls are completed; high-pressure jet grouting technologies and equipment are simple and are easy and convenient to operate, construction can be quickly and efficiently carried out on a large scale, and the time can be effectively saved;