Construction method for diversion well plugging of foundation pit dewatering well

The invention relates to a construction method for diversion well sealing of foundation pit dewatering wells, which belongs to the field of building construction, and adopts the technical scheme that the dewatering wells needing to be sealed are filled with gravels, a communication system is constructed among the dewatering wells by PVC (polyvinyl chloride) pipes, and finally the dewatering wells are communicated with the dewatering wells outside a basement bottom plate. The underground water is guided into the dewatering wells on the periphery of the foundation pit outside the foundation, the dewatering wells are filled with broken stones, the filling height is the bottom elevation of the concrete cushion layer, and the PVC drainage pipes are arranged by selecting PVC pipes with the diameter of 50 mm. The drainage pipes penetrate into the wells downwards by 30 cm after holes are punched in the well walls of the two dewatering wells respectively, the drainage pipes are horizontally communicated among the well