Temporary post joint, temporary structure, and method for constructing slabs of floors

Abstract

There is provided a temporary post joint for remarkably shortening the term of works while maintaining high flexibility of slab-designing. The temporary post joint is used in a temporary structure comprising a first temporary post ( 2 ), and a second temporary post ( 5 ) arranged in a higher floor. The temporary post joint comprises: a bottom face formed connectable to an upper end portion ( 2 b ) of the first temporary post ( 2 ); and a top face formed connectable to a lower end portion ( 5 a ) of the second temporary post ( 5 ). The temporary post joint connects the first and second temporary posts ( 2 and 5 ) in a vertical direction, and the temporary post joint is formed operable to engage with arranged reinforcing bars and is integrally held within a slab even after cast-in-place concrete contacting with the reinforcing bars has hardened and solidified. It is possible to harden and solidify cast-in-placed concrete of the higher and lower floors concurrently in parallel, thereby remarkably shortening term of works.

1 . A temporary post joint operable to being used in a temporary structure comprising a first temporary post, and a second temporary post being arranged in a higher floor than the first temporary post, the temporary post joint comprising:
 a bottom face formed connectable to an upper end portion of the first temporary post; and   a top face formed connectable to a lower end portion of the second temporary post,   wherein the temporary post joint connects the first temporary post and the second temporary post in a vertical direction, and   wherein the temporary post joint is formed operable to engage with arranged reinforcing bars and is integrally held within a slab even after cast-in-place concrete contacting with the reinforcing bars has hardened and solidified.   
   
   
       2 . A temporary post joint as defined in  claim 1 , wherein height from the bottom face to the top face is equal to the thickness of cast-in-place concrete. 
   
   
       3 . A temporary post joint as defined in  claim 1 , wherein the bottom face is connected to the upper end portion of the first temporary post via a form contacting with the concrete. 
   
   
       4 . A temporary post joint as defined in  claim 1 , wherein an anchor is provided with the top face and the bottom face, respectively. 
   
   
       5 . A temporary post joint as defined in  claim 1 , wherein a bar arrangement space opening to the concrete via an opening part is provided within the interior of the temporary post joint, and
 wherein bars penetrate the bar arrangement space via the opening part, thereby the temporary post joint engages with the bars.   
   
   
       6 . A temporary post joint as defined in  claim 1 , wherein specific gravity of the temporary post joint is not less than specific gravity of the cast-in-place concrete. 
   
   
       7 . A temporary post joint as defined in  claim 1 , wherein the temporary post joint comprises: a solid pre-cast concrete block; and an extending bar extending outward from a side of the concrete block, and
 wherein the temporary post joint engages with a bar outside arranged using said extending bar.   
   
   
       8 . A temporary structure, comprising:
 a plurality of first posts standing in a first floor layer;   a first form supported at a boundary between the first floor layer and a second floor layer right above the first floor layer with said plurality of first posts;   a plurality of first post joints including bottom faces connectable to upper end portions of said plurality of first posts, respectively;   a plurality of second post joints including lower end portions connectable to top faces of said plurality of first post joints, respectively, thereby said plurality of second post joints standing in the second floor layer;   a second form supportable at a boundary between the second floor layer and a third floor layer right above the second floor layer with said plurality of second posts; and   a plurality of second post joints including bottom faces connectable to upper end portions of said plurality of second posts, respectively.   
   
   
       9 . A method for constructing slabs of a plurality of floors, comprising:
 standing a plurality of first posts in a first floor layer;   supporting a first form at a boundary between the first floor layer and a second floor layer right above the first floor layer with the plurality of first posts;   connecting bottom faces of a plurality of first post joints to upper end portions of the plurality of first posts, respectively;   connecting lower end portions of a plurality of second post joints to top faces of the plurality of first post joints, respectively, thereby standing the plurality of second posts in the second floor layer;   supporting a second form at a boundary between the second floor layer and a third floor layer right above the second floor layer with the plurality of second posts;   connecting bottom faces of a plurality of second post joints to upper end portions of the plurality of second posts, respectively;   casting-in-place first ready-mixed concrete contacting with the first form; and   casting-in-place second ready-mixed concrete contacting with the second form,   wherein the first ready-mixed concrete and the second ready-mixed concrete is hardened and solidified in at least a part of period concurrently, and afterward the first post joint and the second post joint are integrally held within slabs composed of the hardened and solidified concrete.