| 摘要 |
PROBLEM TO BE SOLVED: To solve such problems that a form manufacturing cost and an operation cost are increased and further a larger space and a longer manufacturing time for the production line are required. SOLUTION: A form having a forming face formed in a curved face forming an arc or a circle copied from the arc face of the opening face of a steel segment in a planar shape on a base board is installed. One of the axial end faces of the steel segment is placed on the base board so that opening side arc faces of the steel segment are positioned to face each other while retaining a required distance in front of the form face. A joint forming die is interposed between right and left ends of the opening side arc face of the steel segment and the forming face of the form. Highly flowable concrete is filled from an upper clearance between the forming face of the form and the opening side arc face of the steel segment or an opening formed in the axial end face of the upper end of the steel segment. Thereby, the form manufacturing cost and the operation cost are reduced and a number of composite segments having dense concrete faces can be formed in a short time. COPYRIGHT: (C)2004,JPO
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