Water pumping type dewatering well and construction method and transformation method of dewatering well

The invention relates to the field of foundation pit dewatering technologies, in particular to a water pumping type dewatering well and a construction method and transformation method of the dewatering well, the water pumping type dewatering well comprises a closed tube well and a drainage device, the closed tube well is buried in a soil body below a foundation pit, and the top of the closed tube well is located below the elevation of a foundation bed. The drainage device pumps out underground water through the closed tube well, and the underground water is transversely drained out of the range of the foundation slab from the soil layer below the foundation pit. The construction method of the dewatering well comprises the following steps of S1 dewatering, S2 foundation pit excavation, S3 well building, S4 pipe burying and S5 well sealing. The transformation method of the dewatering well comprises the following steps of S1, cutting, S2, pipe burying and S3, well sealing. The method has the effect of effectivel