Revolution, semi- hand extending combined use horizontal member aerial construction method

摘要

PURPOSE:To enable execution of a work, e.g. assembly and overhead construction of a horizontal member, revolution, installation of a wire for providing reaction force, and draw off of the horizontal member, only in one spot, to save a site, and to rationalize a work by a method wherein spanning of the horizontal member is effected in a specified stay spot. CONSTITUTION:The given number of stays 1 are aligned along boundary lines (a) and (a) one both sides of a side A and to the outside thereof at a distance (b) therefrom and at intervals of a given distance (c), and the adjoining stays 1 of each of stay trains I and I' are intercoupled through a beam 2 in the direction of a girder. Elevatable temporary pedestals 6 are respectively temporarily erected to the stay 1 of the stay train I on the one side and to the inner side part of the column head of a stay 1'' on the other side positioned facing a stay 1' located approximately in the middle of the stays 1. A horizontal member 3 from the one end of which a half- manual extender 4 is extended is spanned on the temporary pedestals 6 by means of a crane vehicle. Further, the lateral spanning material 3 from which the half-manual extender 4 is extended is revolved in a 90 deg. arc, a wire 13 for providing reaction force is connected to an earth anchor 14, and a wire 15 of a winch 10 for drawing off the lateral spanning material 3 is bounded to the tip of the half-manual extender 4.