The invention relates to the technical field of
dewatering construction, in particular to a
dewatering well plugging drainage device and a construction method. The construction method comprises the following construction steps that backfilling is conducted in the
precipitation well, redundant underground water is pumped, a plugging sleeve is installed at the top of the
precipitation well, the plugging sleeve is fixedly connected with a pouring belt through a
water stop ring, and a first plugging steel plate is installed in the plugging sleeve; in the process of installing the first plugging steel plate, water is continuously pumped in the
dewatering well through a water pump, the water pump is removed, concrete is poured in the upper side area of the first plugging steel plate, a second plugging steel plate is installed at the top of the plugging sleeve, and the airtightness of plugging of the bottom of the dewatering well is detected. According to the construction method, plane operation is changed into three-dimensional operation, the problems of urgent surge in the
precipitation well plugging process and underground
water leakage in the later period are reduced, the quality of the plugged precipitation well is improved, and it can be guaranteed that
engineering construction is completed on schedule during various emergency construction periods and
basement three-dimensional operation.