To sufficiently shorten a construction period and reduce construction cost as a whole by substantially rationalizing and saving labor for a work to turn a form at a construction site.
Two sets of form units A and B are jointed to each other and placed in construction space. Then, the two sets of the form units A and B are alternately moved forward. In addition, the form unit A positioned behind an underground structure along a work execution direction, with cured concrete contained therein, is overhauled in sequence starting from forms K at the last position. Then, the overhauled forms K are sequentially carried forward via the inner side of the form unit B loaded with concrete still to be cured and positioned forward in the construction direction. The forms K are then again assembled at a position forward of the form unit B. Thereafter, concrete is placed outside the assembled form unit A.
OZAKI KIYOHIKO
NAKAHINOKI ARATA
