Deep foundation pit covered-excavation construction main structure supporting device

The invention relates to the technical field of foundation pit supporting devices, in particular to a deep foundation pit covered-excavation construction main structure supporting device which comprises a control column, wherein two supporting columns are correspondingly arranged at two ends of the control column; one end of each supporting column extends to a corresponding columnar slots formed on the bottom surface of the control column; a plurality of uniformly-distributed jamming units are arranged around the supporting columns in an encircling manner; the jamming units are arranged in thecontrol column; a plurality of uniformly-distributed collecting-distributing tube cavities I and collecting-distributing tube cavities II are formed on the control column in an encircling manner; anda three-way tube cavity is formed at the middle position of the control column. According to the structural design of the deep foundation pit covered-excavation construction main structure supportingdevice, the convenient tel