METHOD OF DEMOLISHING CUT BEAM FOR RETAINING EARTH

PURPOSE:To demolish cut beams efficiently with a minimum of work scaffold by setting up a scaffold for demolishing under one end of cut beams, and sliding the cut beams in order and pulling them into the side of scaffold, and removing them one section by one section. CONSTITUTION:A shelf pile 6 for supporting cut beams to be demolished and a cut beam orthogonal to the cut beam 5 are provided with a slide plate for guiding longitudinal sliding and a slip preventive member in advance or at breakup. Next, under one end side of the cut beam 5 is a scaffold 18 for breakup assembled so that it may surround the shelf pile 6 supporting two sections of beam steels 5a (5a1-5a5) on one end side and that it may be positioned below the oil jack between beam members. Next, coupling members for beam steels 5a for the first section and the second section on the scaffold for breakup are removed, and the first section is dismantled. Subsequently, angle brace members at both ends of the cut beam 5 are dismantled, whereby the longitudinal shifting of the cut beams 5 is made possible. Hereafter, the cut beam 5 for shifting to the second section is drawn into the side of the scaffold 18 by sliding, and the beam steel members 5a for every section are dismantled.