JP3315492B2 - Floor beam construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor beam construction method using a half precast concrete slab attached to a cast-in-place reinforced concrete or a precast reinforced concrete wall.

[0002]

2. Description of the Related Art Conventionally, a wall a is provided with a beam b,
In the beam type c, the beam width is generally larger than the wall thickness, and in the beam formation, it is generally larger than the thickness of the floor d. (Figure 1
0)

[0003]

The projecting of the beam form from the wall surface in this way complicates the assembly of the reinforcing bar, the working of the formwork, and the assembly during construction. In addition, the projecting beam shape may obstruct the use of the building. The present invention has been proposed in view of the problems of the prior art described above, and an object of the present invention is to provide a floor beam construction method that eliminates the protrusion of a beam shape and facilitates construction.

[0004]

In order to achieve the above object, the present invention provides a floor beam attached to a wall, which is a flat beam having a beam structure equal to the floor slab thickness and a beam width extending horizontally, and After constructing the reinforced concrete wall up to that point, a thin half-precast concrete plate constituting the floor beam facing the wall is erected using the wall as a supporting material, and the ribs at each beam reinforcing bar incorporated in the half precast concrete plate at the edge of the wall. The rising portions of the bars are tied to each other at the wall position, the beam main bars are arranged at the intersections of the ribs, and the beam reinforcing bars attached to the wall are assembled on each half precast concrete plate, and then concrete Is characterized by being cast.

Further, according to the present invention, a floor beam attached to a wall is a flat beam having a beam structure equal to the floor slab thickness and a beam width extending horizontally, and after a wall in which a steel member is buried is constructed to a position below the slab. A thin half-precast concrete plate constituting the floor beam facing the same wall as a supporting material is built with a steel member protruding above the wall sandwiched therebetween, and the steel member is spread over each half-precast concrete plate. It is characterized in that concrete is poured after assembling a beam reinforcing bar attached to the wall with the sandwiched therebetween.

[0006]

[0007]

According to the present invention, the beam structure of the floor beam attached to the wall is made equal to the slab thickness, and as a flat beam whose beam width expands horizontally, the reinforced concrete wall is constructed under the slab,
On the same wall, a thin half-precast concrete plate constituting the beam is erected, and a beam reinforcing member attached to the wall is assembled over the respective plates and concrete is cast, whereby the beam type projects from the wall surface. Thus, an indoor space in which the beam shape does not hinder use can be obtained.

According to the present invention, each of the half-precast concrete plates is erected using the wall constructed under the slab as a supporting material, and the rising portions of the ribs in the respective plates are embraced at the wall position, A beam main bar perpendicular to this is arranged at the intersection of the ribs and concrete is cast, so that the beam shape does not protrude to the wall, and the crossed ribs at the beam bar intersection at the position on the wall and the inserted main bar This prevents the half precast concrete plate from falling off.

Further, according to the present invention, a wall in which a steel frame member is buried is constructed to a position below the slab, and the half precast concrete plates are erected using the wall as a support member and a steel member projecting above the wall. By assembling beam reinforcing bars attached to the wall with the steel frame member on each half precast concrete plate, and then casting concrete, the beam shape does not protrude on the wall surface as in the case described above. In addition, the half precast concrete plate is prevented from falling off.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. As shown in FIG. 1 and FIG. 2, the wall A is constructed up to the bottom of the slab. In addition, the same wall A is P
It may be a C reinforced concrete wall. Next, two opposite half-precast concrete plates B, which constitute a flat floor beam having a beam structure equal to the floor slab thickness and a beam width extending horizontally, attached to the same wall A, are supported. Of the reinforcing bars forming the beam incorporated near the wall of B, the rising portions 1a at the beam width of the ribs 1 are cross-embraced with each other on the wall A, and the intersection also serves to prevent the precast slab from falling off. The beam lower main bar 2c and the beam upper main bar 3 are arranged.

FIGS. 8 and 9 show details of the construction state of the present method. FIG. 8 is an enlarged view of FIG. 1, and FIG. 9 is a plan view of a reference floor of a building to which the present method is applied. The middle F is a pillar,
G is a girder beam, B is a thin half-precast concrete plate, D is a flat floor beam, C is a floor slab, E is a hollow form block, and 4 is a truss bar built into the half-precast concrete plate B.

First, columns F, SRC, RC structure or PC structure beams G, RC of SRC, RC structure are constructed by on-site construction.
A wall A consisting of a structure or a PC structure is constructed, and the adjacent wall A
A half-precast concrete plate B supported between the bridges is erected, a flat floor beam reinforcing bar serving as a floor beam is arranged, and a floor slab is constructed on the half-precast concrete plate by a hollow slab method.

In the hollow slab method, as shown in the right side of FIG. 9 and the left half of FIG. 8, high truss bars 4 are built in at regular intervals in the Y direction of the half precast concrete plate, A hollow form block E is placed between the adjacent truss bars 4 in parallel with the truss bars 4, the upper slab bars 15 are arranged, concrete 5 is poured, and the slab C is cast.
To build. The hollow form block E is made of styrene foam or plastic.

In this method, as described above, the floor slab C adopts the hollow slab method, and the half precast concrete plate B has a flat beam having a thickness equal to the thickness of the floor slab and a beam width extending horizontally. The beam ribs 1 are arranged so as to cross-embrace with the beam ribs to be assembled to face each other so as to form a floor beam, and the main beam 2 under the beam is also disposed and supported on the wall by the above-described process. And erection.

Next, the beam upper beam 3 is connected to the joint reinforcing bar 2a of the beam lower main bar.
Then, a floor beam is formed by arranging an anchoring reinforcement 2b in the column, and a floor slab is constructed according to the construction procedure of the hollow slab method. FIG. 5 shows a cross section of the hollow slab in FIG. 9 in the X direction. 6 and 7 show another embodiment of the present invention, in which a precast concrete wall A in which a steel plate brace 6 is built is built, and a pair of halves is provided on both sides of the steel plate brace 6 with the wall A as a supporting member. Precast concrete plates B are erected, and mortar pieces 7, 7 for preventing the precast slabs from falling off are inserted between the half precast concrete plates B, the wall A, and the projecting portions of the steel plate braces 6, and the half precast concrete plates B are inserted. B,
On both sides of the half precast concrete plate B, the rib bottom 8 and the beam bottom reinforcement 9 are arranged alongside the ribs 8 and the beam top reinforcement 9 over B.
Cast concrete on B and attach slab beams D and floor slabs C
To construct. In the figure, reference numeral 11 denotes a brace body.

[0016]

According to the present invention, as described above, a floor beam attached to a wall is formed as a flat beam having a beam structure equal to the floor slab thickness and a beam width extending horizontally, and supports a wall constructed below the slab. As a material, a thin half-precast concrete plate for floor beam construction is erected, a beam reinforcing member attached to a wall is assembled over each of the half-precast concrete plates, and then concrete is cast, whereby a beam shape is projected. The interior space that is not used is constructed, and the construction is simplified.

Further, according to the present invention, the rising portions of the ribs of the beam reinforcing bars incorporated at the positions near the walls of the half precast concrete plates are embraced with each other at the wall positions, and are formed at the intersections of the respective ribs. By arranging the main beam reinforcement perpendicular to this and placing the concrete, the interior space without beam form is constructed, and the cross-ribs at the position on the wall and the inserted beam main reinforcement prevent the half precast concrete plate from falling off. Therefore, safety in construction is improved.

Further, according to the present invention, each half precast concrete plate is erected with the wall constructed to beneath the slab as a support member, with the steel frame member projecting above the wall interposed therebetween, and By assembling a beam reinforcing bar attached to the wall with the steel member interposed therebetween, and then casting concrete, it is possible to obtain an indoor space without a beam shape even in a building having a wall in which a steel member is embedded. Things.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view taken along the line II-II of FIG. 3 showing an embodiment of a floor beam construction method according to the present invention.

FIG. 2 is a longitudinal sectional view showing an implementation state of another embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view taken along a roll arrow in FIG. 4;

FIG. 4 is a plan sectional view of FIG. 3;

FIG. 5 is a cross-sectional view of the hollow slab as viewed from the direction indicated by the arrow C-H in FIG. 8;

FIG. 6 is a longitudinal sectional view showing an embodiment of still another embodiment of the present invention.

FIG. 7 is a cross-sectional view of FIG.

FIG. 8 is an expanded view of FIG. 1, the left side shows a truss portion of a hollow slab, and the right side shows a hollow formwork.

FIG. 9 is a plan view of a reference floor of a building, in which the left half is a plan view in which a hollow form is placed on a PCa slab plate, and the right half is a plan view in which a PCa plate B is attached to a wall A and a beam G.

FIG. 10 is a longitudinal sectional view showing a conventional structure.

[Explanation of symbols]

 A Wall A 'Expected wall on the upper floor B Half precast concrete plate C Floor slab D Wall beam E Hollow form e Hollow part F Column G Beam 1 Rib 1a Rise 2 Main beam lower bar (built into PCa plate) 2a Lower edge Main reinforcement joint reinforcement 2b Lower main reinforcement anchoring reinforcement 2c Lower main reinforcement 3 Beam upper main reinforcement 4 Truss bar 5 Concrete (after-struck) 6 Steel plate brace 7 Mortar piece 8 Rib 9 Beam upper reinforcement 10 Beam lower reinforcement 11 Brace body 15 Slab upper reinforcement

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04B 5/43 E04B 5/38 E04B 1/16

Claims (2)

(57) [Claims] 1. A floor beam to be attached to a wall is a flat beam whose beam width is equal to the floor slab thickness and the beam width is expanded horizontally. After a reinforced concrete wall is constructed under the slab, the same wall is used as a supporting material. A thin half-precast concrete plate constituting the floor beam is erected and
Each of the built-in concrete panels
The rising parts of the ribs in the beam reinforcement
Tighten and arrange the beam main bar orthogonal to this at the intersection of the ribs
And, floor beam construction method, which comprises pouring a concrete After assembling the beam rebar incidental to the wall over the respective half precast concrete plate. 2. A floor beam attached to a wall, the beam being formed by a floor slab thickness.
Is a flat beam whose beam width expands horizontally, and
After constructing the buried wall to the bottom of the slab,
A thin half-pipe that constitutes the floor beam facing the holding material
Steel members projecting recast concrete plate onto the same wall
The half precast concrete
Attached to the wall with the steel member sandwiched over the plate
It is especially important to cast concrete after assembling beam reinforcement.
Floor beam construction method.