Permanent form for forming concrete structures

Abstract

A permanent form (13) serving to form concrete structures and comprising sidewalls (11) comprises: an interior form (14) that forms the inner face of a side wall; an exterior form (16) that forms the outer face of the sidewall; and a plurality of vertical reinforcements (17) that are disposed between the interior form and the exterior form and that hold the exterior form alone or together with the interior form. The exterior form and the interior form have: a plurality of base plates (18) that are formed from plastic into square plates and that are aligned so as to be in firm contact with each other in the vertical and horizontal directions; a plurality of central reinforcement plates (19) that are formed from plastic into square plates substantially equal in size to the base plates, that join four adjacent base plates, and that are aligned so as to be in firm contact with each other in the vertical and horizontal directions; and a plurality of end reinforcement plates (21) that are formed from plastic into rectangular plates are arranged into a quadrangular frame so as to join adjacent base plates while being located on the outer edges of the plurality of central reinforcement plates aligned so as to be in firm contact with each other in the vertical and horizontal directions.

1 . A permanent form for forming concrete structures, which is provided to form a concrete structure constituted of a concrete sidewall erected on a concrete bottom slab laid on a bottom portion of a hole dug in the ground or on the ground, and remains on a surface of the sidewall, comprising:
 an interior form forming an inner face of the sidewall; an exterior form forming an outer face of the sidewall, and a plurality of vertical reinforcements which are arranged between the interior form and the exterior form and hold the exterior form or both the exterior form and the interior form,   wherein the exterior form or both the exterior form and the interior form have: a plurality of base plates which are formed into a square plate shape with the use of plastic and closely aligned in the vertical and horizontal directions; a plurality of central reinforcement plates which are formed into a square plate shape substantially equal to that of the base plates in size with the use of plastic, couple four adjacent base plates, and closely aligned in the vertical and horizontal directions; and a plurality of end reinforcement plates which are formed into a rectangular plate shape with the use of plastic, placed on outer edges of the plurality of central reinforcement plates closely aligned in the vertical and horizontal directions, and aligned in a square frame shape while coupling adjacent base plates.   
     
     
         2 . The permanent form for forming concrete structures according to  claim 1 , wherein plastic decorative plates are mounted on surfaces of the plurality of central reinforcement plates respectively, and a pattern is raised or indented on a surface of each of the decorative plates. 
     
     
         3 . The permanent form for forming concrete structures according to  claim 1 , wherein the sidewall is a concrete underground beam which is buried in the ground and provided on the bottom slab to support a building, an outer face of the underground beam is formed of the exterior form, and an inner face of the underground beam is formed of the interior form. 
     
     
         4 . The permanent form for forming concrete structures according to  claim 1 , wherein the sidewall is a concrete square cylindrical sidewall provided on the bottom slab to surround a rectangular parallelepiped storage complex for forming a storage tank, and an outer face of the sidewall is formed of the exterior form. 
     
     
         5 . The permanent form for forming concrete structures according to  claim 2 , wherein the sidewall is a concrete underground beam which is buried in the ground and provided on the bottom slab to support a building, an outer face of the underground beam is formed of the exterior form, and an inner face of the underground beam is formed of the interior form. 
     
     
         6 . The permanent form for forming concrete structures according to  claim 2 , wherein the sidewall is a concrete square cylindrical sidewall provided on the bottom slab to surround a rectangular parallelepiped storage complex for forming a storage tank, and an outer face of the sidewall is formed of the exterior form.