Reinforcement method for foundation of silt soft-based cast-in-place box girder support

The invention relates o the technical field of civil engineering and building construction, in particular to a reinforcement method for a foundation of a silt soft-based cast-in-place box girder support. The reinforcement method is characterized by comprising the following steps of: determining parameters->clearing and leveling a ground->measuring the position of an upper structure and laying off a pile position->carrying out high-pressure rotary jet grouting pile construction->curing->carrying out secondary leveling and compacting->chiseling away the top of the pipe by 50cm and rejecting an unoccupied pile head->paving 20cm grading gravels, flattening and compacting->laying steel-plastic grilles->paving a 30cm grading gravel mattress layer->flattening and compacting->pouring a concrete cushion layer. Compared with the prior art, the reinforcement method has the advantages that the respective principle of a combined process is exerted, the cast-in-place beam deformation requirement is satisfied, the construction process is simple and rapid, the cost is low, the safety risk is small, the permanent and temporary combination is realized, and the follow-up input is saved.