JP2918626B2 - Construction method of precast reinforced concrete inverted beam frame - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for constructing a precast reinforced concrete reverse beam frame capable of obtaining a shear stress transmission effect between upper and lower floors of a building, a floor plate lifting effect, and the like.

[Conventional technology]

Generally, (wall type) precast reinforced concrete construction is a construction method in which reinforced concrete walls and floors are each made into a precast reinforced concrete product manufactured at a factory as a part, and this is assembled on site,
In particular, it is frequently used as a method suitable for a building where many walls are uniformly arranged, such as an apartment house or a standard house. That is, according to this method, there are many advantages such as mechanization of concrete work, production of members is not affected by weather, and construction period is shortened.

As a method of constructing a frame with such a precast reinforced concrete structure, a case where a member in which a wall column and a beam are integrally formed is used, and a case in which the wall column and a beam are not integrally formed but each member is individually formed. And other methods.

[Problems to be Solved by the Invention] However, in the above frame method, a beam is placed and tied immediately above a wall column, and a floor plate is placed on the beam. Due to the provision, the height of the opening of the building is limited to below the beam. Therefore, a method of increasing the height of the opening from the point of daylighting has been desired. In addition, since the function of transmitting the shearing force on the upper floor to the lower floor during an earthquake or the like is small, there is also a drawback that it can be applied only to a building having a low height.

The present invention has been made in view of such a conventional problem, and has as its object to solve the above-mentioned problem by using a reverse beam frame in which a beam is mounted on a floor plate.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a method for constructing a frame with precast reinforced concrete members, wherein a floor plate is placed on the upper end of an upright wall or column, and a beam is further placed on the floor plate. A method of constructing a precast reinforced concrete reverse beam frame in which, when joining each member with the steel members disposed between the members and the members, a steel material is inserted into a joint portion and a grout material is filled to integrate the members. It is what it was.

[Action]

Since the present invention has the above-described configuration, there is no beam at the lower part of the ceiling floor as in the related art, so that the opening of the building can be secured to the ceiling floor, lighting is improved, and a sash is directly attached to the floor panel. And installation work is simplified.

In addition, since the floor panel is lifted from the beam on the floor using steel, the floor panel is no longer bent, and in the event of an earthquake, etc., it acts to transmit the shear force of the upper floor to the lower floor, thereby enhancing the safety of the building. . In addition, the rigidity of the member is large because the joint is formed by inserting a steel material and filling the grout material with the wet joint.

〔Example〕

Hereinafter, the present invention will be described with reference to the drawings. 1 and 2 show an embodiment according to the present invention.

FIG. 1 is a schematic elevation view of a one-story house with a reverse beam frame according to the present invention constructed using precast reinforced concrete members, and FIG. 2 is a similar two-story schematic elevation view.

In the figure, reference numeral 1 denotes a wall pillar, which is erected on a foundation connecting beam 4 provided for preventing uneven settlement, etc., and a floor plate 2 is placed on an upper end of the wall pillar 1, Further, on the floor plate 2, a reverse beam 3 is mounted. In addition, the above-mentioned inverted beam 3
The wall column 1 is firmly joined via a floor plate 2 to a steel material 5 such as a deformed steel bar. At the time of this joining, a grout injection hole (not shown) (which reaches the steel material 5) is provided in a wall column or other appropriate position, and a so-called wet joint is performed.

6 is a steel material for lifting the floor plate 2 on the inverted beam 3,
As shown in FIG. 4 which is a partially enlarged view of the II section and the II-II section in FIGS. 1 and 2, a grout injection hole provided at a required interval along the axis of the inverted beam 3. 3a,
A steel material insertion hole 6a such as a sheath tube is inserted through a grout injection hole 2a provided corresponding to the steel material 6 of the floor plate 2,
In addition, a steel material 6 such as a deformed steel bar is inserted into the insertion hole 6a. The lower end of the steel material 6 penetrates an end plate 7 provided so as to cover the lower end of the grout injection hole 2a to prevent the grout material from leaking, and is fixed by a fixing metal such as a nut 8. Next, a wet joint for injecting and filling the grout material 9 into the grout injection holes 2a and 3a is performed. (Of course, the end plate 7 is pressed upward through the nut 8 by some method until the grout material is hardened).

The wet joint by filling the grout material as described above is also used when the wall material 1 and the inverted beam 3 are joined to each other through the steel plate 5 through the floor plate 2.

By constructing in this manner, a building as shown in FIGS. 1 and 2 is formed. The opening 10 can have a height up to the floor plate 2 which is a ceiling plate, and there are advantages in daylighting and the like. The sash can be attached directly to the floorboard, and the construction is simplified.

FIG. 3 is a partial view of A and B in FIGS. ₁ and ₂ , in which horizontal arrows τ ₁ and τ ₂ indicate shear forces,
The vertical arrow σ indicates the tensile force. That is, the joining method in which the floor plate 2 directly below is lifted by the steel material 6 by the reverse beam 3 is as follows.
The function of lifting the floor plate 2 and the function of transmitting the shear force of the upper floor to the lower floor at the time of an earthquake or the like at the same time are exhibited. Therefore, it is possible to reduce the deflection due to the load on the floorboard and to obtain the upper and lower floor shear force transmitting effect having resistance to the shear stress at the time of an earthquake or the like.

〔The invention's effect〕

As described above, according to the present invention, since there is no beam below the ceiling floor, the opening of the building can be secured to the ceiling and lighting can be improved, and the floor plate can be lifted to eliminate deflection of the floor plate. The sash can be installed directly on the sash to simplify construction, etc. Besides, the use of precast reinforced concrete members allows mechanization of concrete work, production is not affected by the weather, saving of formwork, saving of labor ,
Many effects can be obtained, such as shortening the construction period.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a one-story house construction according to an embodiment of the present invention, FIG. 2 is a conceptual diagram of a two-story embodiment, FIG.
FIG. 2 is a cross-sectional view taken along line II and II-II in FIG. 2, and FIG. 4 is an enlarged view common to portions A and B in FIGS. FIG. 1 ... wall column, 2 ... floor column, 3 ... beam (reverse beam), 5, 6 ...
... Steel, 9 ... Grout.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kenichi Kikuchi 1-25-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Corporation (58) Field surveyed (Int. Cl. ⁶ , DB name) E04B 1 / 04 E04B 1/20 E04B 5/02

Claims (1)

(57) [Claims] 1. A method for constructing a frame with precast reinforced concrete members, wherein a floor plate is placed on the upper end of an upright wall or column, and a beam is placed on the floor plate to interpose the members and members. A method for constructing a precast reinforced concrete reverse beam frame, characterized in that when joining members with the disposed steel material, the members are integrated by inserting a steel material into a joint portion and filling a grout material.