To provide a formation method of a steel plate underground partition wall, which can be executed at a low cost on a site of a small-scale building.
A plurality of steel plate members 11 having a prescribed dimension in a horizontal direction and a prescribed length in a vertical direction are forcibly fitted underground successively so that side edges are mutually connected with adjacent steel plate members. The steel plate member includes a body part 11a for which a steel plate is bent, and a steel pipe 11b attached to the body part, and the steel plate member is forcibly fitted underground while supplying water from an upper part of the steel pipe and discharging the water from a lower end. Also, the steel pipe may be prepared separately from the steel plate member so that a position in the horizontal direction of the steel pipe is restrained by the steel plate member and they are forcibly fitted together. Further, a distal end of the steel plate member may be wound around a distal end of a highly rigid stiffening member and folded upwards to be forcibly fitted into soil together with the stiffening member. The stiffening member can be pulled out upwards after the steel plate member is forcibly fitted.
NISHIHATA SANKAKU
KOJIMA YUKITOSHI
NISSHIN KOKAN KK
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