The invention relates to the technical field of deep foundation pit supporting and fabricated underground structure construction, and discloses a foundation pit fabricated side wall and
enclosure adjustable force transmission structure which comprises a lower section structure composed of a bottom sealing plate and a lower section sleeve and an upper section structure composed of an upper section sleeve, a limiting lead screw and a rotating
handle. By means of the adjustable
mechanical design, the defects of traditional concrete backfilling are overcome, wide-range stepless adjustment is achieved through the spiral transmission mechanism, the
fertilizer groove width deviation is perfectly adapted, field
cutting or filling is not needed, the middle plate can be synchronously installed along with the side wall as a prefabricated part, and rapid jacking can be achieved by rotating a
wrench after the middle plate is completed; the concrete pouring and curing
waiting time is thoroughly saved, and the construction efficiency is greatly improved; meanwhile, the rigid
mechanical force transmission path ensures high
bearing capacity and reliability, the test is free of damage and deformation, the whole device is simple in structure and is operated only by a common
wrench, and the construction difficulty and cost are reduced.