| 摘要 |
PROBLEM TO BE SOLVED: To secure adequate curing time while dispensing with standby time, and prevent congestion in a tunnel when a telescopic type form is moved. SOLUTION: The telescopic type form 10 is constituted by coupling telescopic type form units 10A which are constituted by splitting one placing area into eight parts in a lengthwise direction. A group 10a of the eight units 10A on the side of a leading end is used for a concrete placing area C, and a group 10b of the eight units 10A on a rear side is used for a concrete curing area B. The removal, movement and assembly of each of the forms 10 are carried out by using a mobile trestle 14 which is moved on transportation rails 12 laid inside the form 10. Initially, the groups 10a of the area C are equal in number to the groups 10b of the area B. Next, each time one unit 10A is moved, the area B is reduced and finally disappears, so as to serve as a concrete-placed area A.
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