Geotechnical engineering foundation pit protection device

The utility model provides a geotechnical engineering foundation pit protection device which comprises two sets of vertical frames, bases are fixedly installed on the lower surfaces of the vertical frames, inserting grooves are formed in the peripheral surfaces of the vertical frames, and transverse partition plates are movably installed between the two sets of opposite inserting grooves. According to the building construction device, the movable seat is arranged, after the base is placed stably, a constructor can tread on the movable seat, the movable seat presses a damping spring column in a guide groove through a guide block, the damping spring column vertically descends, and the movable seat is fixed to the base through the guide block. According to the foundation pit protection device, the limiting bolts are arranged on the base, then the limiting bolts are inserted into the ground, displacement of the base due to ground vibration in the construction process is prevented, by arranging the extension mecha