FORM STRUCTURE FOR USE IN SPIRAL-TYPE SLIP FORM CONSTRUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To prevent concrete from overflowing from an upper end opening of a slip form for use in spiral-type slip form method and to move the slip form without obstruction of arranged bars.;SOLUTION: The slip form 17 having a pair of internal and external forms 17a, 17b arranged on both sides of an annular wall body 13 to be constructed is provided. The slip form 17 is spirally moved while concrete 19 is placed therein, whereby a concrete wall 20 molded by using the slip form 17 is spirally extended. Thus, the annular wall body 13 is constructed. Further, cover bodies 22, 22a are arranged over the upper end opening 17c of the slip form 17. The cover bodies 22, 22a prevent the concrete 19 placed in the slip form 17 from overflowing while allowing the arranged bars 18 upward protruding from the concrete wall 20 to pass therethrough.;COPYRIGHT: (C)2001,JPO