JP2009079396A - Ceiling slab construction method for mid-to-high-rise building, and its apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce almost by half a hardening-solidifying construction time of a ceiling slab with ready mixed concrete of a mid-to-high-rise building using comparatively large and thick reinforced concrete. <P>SOLUTION: This ceiling slab construction method for the mid-to-high-rise building comprises providing a ceiling form 4 supported by a plurality of supports 1 through sleepers 2 and joists 3, with a through hole 5 opened and surrounded by the sleepers 2 and joists 3, placing the outer periphery lower face of a reinforced concrete block 6 on the inner periphery upper face of the through hole 5, providing a lower face center part of the block 6 detachably with a support 1' of the block 6, providing an upper face center part detachably with a support 1" for the sleeper 2 and joist 3 of a ceiling form 4' on the upper floor, extending reinforcements 7, 7', 8, 8' of the block 6 in four directions from the outer periphery of the block 6 to connect them to reinforcements 9, 9' on the ceiling form 4, and forming the height t of the block 6 and the thickness of the ceiling slab to be the same. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a ceiling slab construction method and apparatus for putting ready-mixed concrete into a form of a ceiling slab on a plurality of floors of medium- and high-rise reinforced concrete approximately once.

  Conventionally, when constructing medium- and high-rise reinforced concrete buildings, ceiling slabs are constructed by pre-casting girder beams pre-installed with pre-cast concrete plates that can be used as a substitute for the formwork (panel). The construction of ceiling slabs was performed (for example, Patent Document 1).

  Buildings based on such construction methods may be excellent in standardity, but it is necessary to mass-produce girder beams and ceiling slabs, which reduces basis weight, unity in design, decreases in design area, and associated earthquake resistance. There was a problem with sex.

  Further, in a large medium- and high-rise building, a relatively wide ceiling slab is constructed by a large number of supporting works due to a relatively long large drawing material and joists, and it takes time to harden and solidify the concrete (for example, Patent Document 2). ).

  However, the width and thickness of the ceiling slab can be designed freely, but it took time to harden and solidify the concrete of the ceiling slab on each floor.

JP-A-9-217417 JP-A-8-270069

  An object of the present invention is to shorten the time required for hardening and solidifying a ceiling slab made of ready-mixed concrete of a medium and high-rise building made of relatively wide and thick reinforced concrete to about ½.

In order to achieve the above-mentioned object, the present invention opens a through hole surrounded by the above-mentioned large drawing and joists in a ceiling form frame supported by the multiple supports and through the joists. Each reinforced concrete block is placed on the outer peripheral lower surface, and the support for the block is detachably provided at the center of the lower surface of the block. The reinforcing bar of the block is extended in four directions from the outer periphery of the block and connected to the reinforcing bar on the ceiling formwork, and the height of the block and the thickness of the ceiling slab are formed to be the same. Ceiling slab construction method for medium and high-rise buildings,
Secondly, the ceiling slab construction method according to the first invention, wherein the through-holes are opened in every other four corners surrounded by the joists and the fork that are orthogonal to each other with a space therebetween,
Third, the method for constructing a ceiling slab for a medium- and high-rise building according to the first or second invention, wherein the reinforced concrete block is a reverse truncated cone shape,
Fourthly, a through-hole surrounded by the above-mentioned large draw and joist is opened in a ceiling formwork supported by a plurality of supports through the joist and joists, and the outer peripheral lower surface of each reinforced concrete block is formed on the inner peripheral upper surface of each of the through-holes. The support of the block is detachably provided at the center of the lower surface of the block, the support for the joist and the joist of the upper stage is detachably provided at the center of the upper surface, and the rebar of the block A ceiling slab construction apparatus for medium- and high-rise buildings, which extends from the outer periphery of the block in four directions and is connected to the bar arrangement on the ceiling formwork, and has the same height as the block and the thickness of the ceiling slab,
Consists of.

  Therefore, the upper and lower joists are arranged orthogonally between the frame of the mid-to-high-rise building and the multi-stage beam, the upper end of the support (post) is in contact with the lower surface of the crossing, and the lower end is supported by the lower concrete floor. Place the ceiling formwork (ceiling panel) on the top of the joist.

  Then, reinforcing bars parallel to the panel are arranged vertically and horizontally on the top of the ceiling panel.

  And the outer peripheral lower surface of a reinforced concrete block is piled up on the inner peripheral upper surface of the through-hole surrounded by the said large drawing and joists, respectively, and this through-hole is obstruct | occluded with this block.

  A support reaching the lower concrete floor is detachably provided at the center of the lower surface of the block so that the block is supported by the concrete floor, thereby closing the through hole.

  An upward support is detachably provided at the center of the upper surface of the block, and the upper and lower crossing portions that support the upper panel can be supported at the upper end of the support.

The reinforcing bars of the block are extended and exposed in four directions from the middle outer periphery of the block, and the reinforcing bars arranged on the ceiling formwork (ceiling panel) are wound and connected with a steel wire,
Ready-mixed concrete can be poured simultaneously or sequentially onto the ceiling formwork and the upper ceiling formwork.

  The ready-mixed concrete put into the ceiling mold and the upper ceiling mold almost simultaneously harden and solidify at the same time, and there is an effect that the ceiling and the ceiling slabs of the second and higher ceilings can be applied almost simultaneously.

  Between the pillars and walls 10 of the mid-to-high-rise building and the concrete beams 11, 11 of a plurality of stages, a plurality of large draws 2, 2 and joists 3, 3 perpendicular to the horizontal direction are arranged, and a large draw 2 at the intersection The upper end of the steel support (support) 1 is in contact with the lower surface of the steel frame, the lower end is supported on the concrete frame floor 12, and the ceiling formwork (compane) 4 is placed on the upper surfaces of the joists 3 and 3 (FIG. 2). In addition, a reinforced concrete block 6 'is placed on the intersection of the large drawing 2 and the joist 3 on the control panel 4, and the support 1 is placed on the block 6'. Two intersections can be supported (FIG. 3).

  As shown in FIG. 7, the control panel 4 is formed with through holes 5 in the quadrangular portions surrounded by the large pulls 2 and 2 and the joists 3 and 3, and reinforced concrete is formed on the upper surface along the inner circumference of the through holes 5. The outer peripheral lower surface of the block 6 is placed and supported (FIG. 5B).

  The through-holes 5 are formed in the center of each of the four corners surrounded by the large pulls 2 and 2 and the joists 3 and 3, or are formed in every other square part as shown in FIG. .

  Flange 1a 'and 1a "provided at the upper and lower ends of support columns (supports) 1' and 1" are in contact with the center of the upper and lower surfaces of the block 6 and are detachably attached to the block 6 by bolts 13 and bolt holes 13 '. The lower end of the lower support 1 'is supported on the concrete frame floor 12, and the upper end of the upper support 1 "is supported in contact with the lower surface of the intersection of the joist 3 and the draw 2 installed on the directly upper floor, and the upper surface of the joist 3 The upper panel 4 ′ is placed on the panel 4 ′, and the through holes are not formed in the panel 4 ′, and only the longitudinal and horizontal reinforcing bars 9, 9 ′ are arranged.

  The diameter of the lower surface of the reinforced concrete block 6 is larger than the diameter of the through-hole 5 and is the same as a low cylinder, low prism, reverse head cone or reverse head cone with the same height t as the ceiling slab s (see FIG. 3, FIG. 4 (B)), etc., and the outer surface is preferably formed into a rough rough surface 6 ′ (FIG. 4) to strengthen the bond with the slab s by raw concrete.

  The vertical and horizontal rebars 7, 7 ', 8, 8' are arranged in four directions in the top and bottom double as shown in FIGS. 3, 4 (b), 5 (c), (d), (e), In addition, the block 6 extends from the outer periphery to the four directions, and is connected to the upper and lower double reinforcing bars 9 and 9 ′ arranged vertically and horizontally on the control panel 4 by being wound around the binding wire 14.

  Reinforcing bars 9, 9 'are also arranged vertically and horizontally on the upper ceiling formwork (upper panel) 4'.

  In this state, the ready-mixed concrete is placed on the ceiling formwork (compane) 4 to the upper surface level of the block 6, and immediately thereafter, ready-mixed concrete is placed on the upper ceiling formwork 4 '.

  It is also possible to place the ready-mixed concrete simultaneously on the ceiling mold 4 and the upper ceiling mold 4 '.

  According to the present invention, the ready-mixed concrete can be placed almost simultaneously on the upper surface of the ceiling formwork 4 immediately above and the upper surface of the upper ceiling formwork 4 ', so the ceiling panels 4, 4' on the second and third floors. It is possible to construct the concrete ceiling slabs s, s, which took about 2 months per floor, in about 1 month because raw concrete can be placed almost simultaneously and cured and solidified in about 1 month. became.

It is a longitudinal cross-sectional view of the ceiling slab construction method of the middle-high-rise building of this invention. It is a longitudinal front view of a ceiling slab and its upper stage ceiling slab construction method. It is the vertical front view of the ceiling slab of the other Example of "FIG. 2", and its upper stage ceiling slab construction method. It is a perspective view of a reinforced concrete block. (A) is a plan view of a reinforced concrete block, and (B) is a front view of the implementation state of (A). (A) The figure is a partial longitudinal sectional view of the ceiling formwork (panel), (b) (c) is a front view of the implementation state of the block, and (d) is a longitudinal sectional view of the ceiling slab according to the present invention. . It is a top view of the Example of a ceiling formwork (panel). It is a top view which shows the Example of the arrangement | positioning state of the said block.

Explanation of symbols

1,1 ', 1 "support 2 large drawing 3 joist 4,4' ceiling formwork (panel)
5 Through-hole 6 Reinforced concrete block 7, 7 ', 8, 8' Reinforcing bar 9, 9 'Reinforcement s Ceiling slab t Height

Claims (4)

Open the through-holes surrounded by the above-mentioned large drawing and joists in the ceiling formwork supported by the multiple supports and through the joists,
Place the outer peripheral lower surface of the reinforced concrete block on the inner peripheral upper surface of the through hole,
A support for the block is detachably provided at the center of the lower surface of the block, and a support for the joist and joist of the upper stage ceiling is provided detachably at the center of the upper surface.
A medium-to-high-rise building characterized in that the reinforcing bars of the block are extended in four directions from the outer periphery of the block and connected to the reinforcing bars on the ceiling formwork so that the height of the block is equal to the thickness of the ceiling slab. Ceiling slab construction method.   The ceiling slab construction method according to claim 1, wherein the through-holes are opened at every other four corners surrounded by joists and large pulls that are orthogonal to each other with a space therebetween.   The ceiling slab construction method for medium- and high-rise buildings according to claim 1 or 2, wherein the reinforced concrete block has a reverse headed cone shape. Open the through-holes surrounded by the above-mentioned large drawing and joists in the ceiling formwork supported by the multiple supports and through the joists,
Place the outer peripheral lower surface of the reinforced concrete block on the inner peripheral upper surface of the through hole,
A support for the block is detachably provided at the center of the lower surface of the block, and a support for the joist and joist of the upper stage ceiling is provided detachably at the center of the upper surface.
A ceiling slab of a medium- and high-rise building in which the reinforcing bars of the block are extended from the outer periphery of the block in four directions and connected to the reinforcing bars on the ceiling formwork, and the height of the block and the thickness of the ceiling slab are formed to be the same. Construction equipment.

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