OPENING PART STRUCTURE FOR SHAFT

摘要

PROBLEM TO BE SOLVED: To provide a shaft opening part structure capable of constructing a starting mouth and an arrival mouth for an excavator. SOLUTION: An opening part steel plate 4 is connected and installed to an earth retaining wall 2 by means of a connection steel plate 6 arranged while surrounding an opening 3 and an opening 5 in the rectangular frame form between the opening part steel plate 4 and the earth retaining wall 2. Between the earth retaining wall 2 and the opening part steel plate 4, a sliding steel plate 7 is arranged movably in the vertical direction. When a bolt 10 is screwed into a screw hole 8 penetrating the opening part steel plate 4 and a screw hole 9 not penetrating the sliding steel plate 7, the sliding steel plate 7 and the opening part steel plate 4 are fixed for closing the opening 5. Water is cut off by means of a gasket 13 between the sliding steel plate 7 and the opening part steel plate 4 and gaskets 51 and 52 arranged in two levels above a slit 12.