JP2850743B2 - Precast wall reinforced concrete wall joint structure and 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 wall-to-wall or a wall-to-floor slab for a continuous apartment house or the like consisting of a precast reinforced concrete reinforced concrete wall composed of a short-side doorway wall and a long-side opening girder-row wall. And a method of joining the same.

[0002]

2. Description of the Related Art In a multi-family house, a door border in a short side direction,
Alternatively, a wall-type structure that resists a vertical load and an earthquake load with a girder wall and a girder wall with an opening in the long side direction can be easily used and often used because a pillar-shaped or beam-shaped projection cannot be formed in a room.
However, conventionally, cast-in-place concrete using a large amount of formwork was used.

[0003]

When the above-mentioned wall-type apartment house is made of cast-in-place concrete as in the past,
Although the construction of the formwork is easy, the amount of the formwork is increased, and the cost merit is poor as compared with the ordinary ramen structure. For this reason, precasting has been attempted for a long time, but at present, there is no definitive decisive factor in the wall-to-wall and wall-to-floor joint structures, and the joints are costly and time-consuming. The present invention
In order to solve this problem, the present invention provides a low-cost and hassle-free precast reinforced concrete wall-to-wall and wall-to-floor slab joint structure.

[0004]

In order to join the precast door wall and the girder wall to the floor slab, a notch parallel to the wall is provided on one side of the lower part of the precast wall, and the vertical line of the precast wall is extended, and A reinforced joint and a lap joint extending from the floor slab are provided. After arranging the lap joint, a cotter and a dimple are further provided at the end of the notch, and mortar or concrete (hereinafter referred to as mortar) is provided at the notch of the precast wall. Is sprayed to form a single body, and the surface is troweled to form a joint.

[0005] In the case of wall-to-wall joining, a cutout is provided at the butt end of the precast wall to be joined, the reinforcing steel of each precast wall is extended, and a lap joint is formed at the site to be joined. After the arrangement of the bars, a cotter and a dimble are further provided at the ends of the cutout portions, mortars are sprayed on the cutout portions to be integrated, and the surface is troweled to form a joint.

[0006] In the case of an apartment house composed of a wife wall and a door boundary wall, a girder wall having an opening, and a floor slab, the construction procedure is as follows: the door wall is built, and the girder walls on the balcony side and the corridor side are constructed. Construction, then the lower floor slab and precast wall and lap joint reinforcement of the joint between the precast walls are constructed, mortar is sprayed at the joint, the half precast slab of the upper floor is installed, and the upper end of the slab is installed. After arranging the reinforcements, placing slab concrete is repeated on each floor to complete it.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a basic structure of a joint structure between precast walls or floor slabs.

[0008] One end of the precast wall to be joined is cut out along the wall surface so that the vertical streak 1 is exposed in the notch.
The length L of the notch is a length necessary for the lap joint of the reinforcing bar. The reinforcement in the precast wall is the same as in the case of ordinary cast-in-place concrete, the longitudinal reinforcement 1 at the notch is stretched out, a lap joint is formed with the reinforcement from the lower floor, and the horizontal reinforcement 2 is constructed on site. Mortars are sprayed on the cutouts, integrated with the lower floor and finished with a trowel to complete the joint. In addition, the reinforcement from the lower floor is basically the same diameter and the same interval as the reinforcement of the precast wall, but it is possible to halve the interval with the same diameter and use a single row reinforcement, I can do it. As shown in FIG. 2, a cotter 3 and a dimple 4 are provided at the end of the cutout portion of the precast wall to enhance the joining integration.

FIG. 3 is a top view of an apartment house or the like comprising a door border wall 5, a girder wall 6 on the window side, a girder wall 7 on the door side, and a half precast floor 8. FIG. 4 is an A view of FIG. FIG. 5 shows a cut-out portion necessary for joining between the door border wall 5 and the girder wall 6 of the apartment house. The girder wall 6 may have an opening as a single precast wall as shown in FIG. 5B, or may have a structure in which the opening is bisected by the opening as shown in FIG. 5C.

FIG. 6, FIG. 7, FIG. 8, and FIG. 9 show detailed views of the joint structure. FIG. 6 shows the details of the joint between the precast door wall 5 and the floor slab, in the case where there is no wall beam. Lateral line 2 is to be constructed on site.

FIG. 7 shows the details of the joint structure between the precast door wall 5 and the floor slab in the case where there is a wall beam. Difference line 9
The vertical bar 1 of the precast wall on the upper floor is a lap joint, and the horizontal bar 2 and the upper bar 11 in the stirrup bar 10 of the wall beam are constructed on site.

FIG. 8 shows the details of the joint between the door border wall 5 and the girder walls 6, 7 at a position where there is no wall beam.

The joint vertical bars 12, the joint horizontal bars 13, and the cross reinforcing bars 16 are constructed on site.

FIG. 9 shows details of the joint between the door wall 5 and the girder walls 6, 7 at the position where the wall beam is located.

The cross reinforcement 16, the joint vertical reinforcement 12, and the beam main reinforcement 14 are constructed on site. The notch at the joint is shown in FIG.
The opposite case, such as 0, is also possible.

[0016]

The effects of the present invention are as follows.

(A) There is no embedding of a splice sleeve, it is a simple flat plate, the reinforcement is the same as that of a normal wall type structure, and it is easy to manufacture a precast wall without special reinforcement.
And it is low cost.

(B) As shown in FIG. 11, since the thin portion supports the vertical load, it is only necessary to support the fall. In addition, the thin-walled portion becomes a single-sided formwork of sprayed concrete, and no formwork is required. The joining of the reinforcing steel on site is very simple with a lap joint, and the on-site construction is extremely easy.

(C) Since the blasting is performed with the trowel, no misalignment occurs. (D) Since the cotter and the dimble are provided at the end of the notch, the integration can be further improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic form of a joint structure between precast walls or floor slabs.

FIG. 2 is a diagram showing a cotter or a dimple provided at an end of a cutout portion of a precast wall in order to enhance integration of a joining portion.

FIG. 3 shows a top view of an apartment house or the like including a door wall, a girder wall on a balcony side, a girder wall on a corridor side, and a half precast floor.

FIG. 4 is a view as viewed from A in FIG. 3;

FIG. 5 is a view showing cut-out portions necessary for joining between a door border wall and a girder wall of an apartment house.

FIG. 6 is a view showing details of a joint between a precast door wall and a floor slab, showing a case where there is no wall beam.

FIG. 7 is a view showing details of a joint structure between a precast doorway wall and a floor slab, showing a case where there is a wall beam.

FIG. 8 is a diagram showing details of a joint between a door border wall and a girder wall at a position where there is no wall beam.

FIG. 9A is a detailed plan view of a joint between a door border wall and a girder wall at a position where a wall beam is present. (B) It is an elevational view of FIG.9 (a).

FIG. 10 is a diagram showing another combination of a door border wall and a girder row wall.

FIG. 11 is a view showing a structure for supporting a vertical load with a thin portion and preventing the device from falling down.

[Explanation of symbols]

1 ... vertical streaks, 2 ... horizontal streaks, 3 ... cotters, 4 ...
・ Dimple, 5 ・ ・ ・ door wall, 6 ・ ・ ・ Balcony side girder wall, 7 ・ ・ ・ Corridor side girder wall, 8 ・ ・ ・ Half precast plate, 9 ・ ・ ・ Striker, 10 ・ ・ ・ Starap bar ,
11 ... top bar of wall beam, 12 ... joint vertical bar, 13
················································································· 17

Claims (2)

(57) [Claims] Claims: 1. In a precast concrete-made building composed of a masonry wall, a doorway wall, a girder wall, and a floor slab, when the wall and the wall or the floor slab are joined, the butted wall portion is cut out in parallel. The internal rebar is exposed to the notch of the required length for the lap joint, the inner rebar is used as a lap joint, reinforcing bars are installed on site, and a cotter and a dimble are provided at the end of the notch, and the notch is provided in the notch. Precast wall-type reinforced concrete wall joint structure characterized by being integrated by spraying mortar from outside. 2. A door boundary wall is built, a girder wall on a balcony side and a corridor side is built, and then a lap joint of a lower floor slab and a precast wall and a joint of the precast walls are constructed, and a notch is formed. Mortars are sprayed on the floor, and a half-precast slab on the upper floor is installed. Construction method.