JPH0489941A - Joining method for precast concrete anti-seismic wall and concrete mass - Google Patents

Abstract

PURPOSE:To facilitate construction and transportation of a precast concrete anti-seismic wall and accomplish a reliable joint with concrete mass by embed ding an insert inside of the joint end with the concrete mass of a precast anti- seismic wall, fitting a fixation anchor at the time of placing, and then pouring in the mass concrete. CONSTITUTION:Reinforcing rods are accommodated in a precast anti-seismic wall A, and an insert 1 fitted with an anchor rod 2 is embedded fast inside of the joint end with a pillar B. Then, this anti-seismic wall A is placed in the joining position with the pillar B. An anchor 6 for fixation of pillar is fixed to the insert 1, and pillar concrete is poured in, followed by construction of pillar B, which is consolidated with the anti-seismic wall A. This facilitates rod arranging and form removal at the time of fabricating precast anti-seismic wall A, also provides easy handling in stocking and transportation as well as easy erection of anti-seismic wall, and allows accomplishment of consolidated structure of the mass concrete and anti-seismic wall through anchoring.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of joining a precast concrete shear wall and a concrete frame such as a column.

(Prior art) When precasting a shear wall in RC or SRC construction, as shown in Figure 4, the wall reinforcement (bl) of the shear wall (a) is made to protrude from a part of the joint end (C), and the same Projection (b
') was used as an anchor and fixed in the concrete part of the wall, in order to integrate the precast shear wall with the building frame.

(Problem to be Solved by the Invention) As described above, in the conventional precast seismic wall, a part of the wall reinforcement protrudes from the end face of the member, so when manufacturing, it is necessary to place the wall reinforcement in the side formwork for the wall bottom mold. It is necessary to protrude through the walls, making it difficult to arrange and demold the reinforcement, and the protruding ends of the wall reinforcements become a hindrance when stocking, yIvIi. The protruding ends of the reinforcement must be constructed so that they do not interfere with the column reinforcement.

The present invention has been proposed in view of the problems of the prior art, and its purpose is to use precast concrete that is easy to manufacture, transport, and erect, and is reliable in terms of structural strength. The point is that it provides a method of joining a shear wall and 11 concrete bodies.

(Means for solving tJt!!) In order to achieve the above object, according to the method of joining a precast concrete shear wall and one concrete body according to the present invention, an insert is buried inside the joint end to the concrete frame. After the precast concrete shear wall is erected, fixing anchors for the frame are attached to the inserts, and then concrete is cast integrally with the shear wall.

(Function) According to the present invention, as described above, the reinforcement of the precast concrete shear wall is housed within the wall, and the inserts are buried inside the joint end, so that the connection to the same concrete body is possible regardless of the reinforcing bars in the same concrete body. The shear wall can be lowered into the position.

After the shear wall is erected, fixing anchors are attached to the inserts, concrete for the frame is poured in contact with the shear wall, and forward bending is carried out through the anchors fixed in the concrete. The building frame and precast concrete shear walls are joined together.

(Example) The illustrated example in which the present invention is applied to the connection between IIc or SRC columns constituting a concrete frame and a precast concrete shear wall will be described below.

The enclosure is a precast concrete shear wall, and the reinforcement is placed inside the wall and inserted inside the joint end to the column + S +) (1)
has been buried and established.

In the figure, (2) is the anchor bar attached to the insert (1), and (3) is a part of the kotsuta.

Then, the earthquake-resistant saint is erected at the position where it joins to the pillar (Bl).

At this time, since the reinforcement of the seismic saint is housed within the wall, it is possible to drop the earthquake-resistant wall A into a predetermined position regardless of the column reinforcements such as the main reinforcement (4) and the column reinforcement (5). can.

After the earthquake-resistant saint is erected in the predetermined position, the anchor (6) for fixing the column is attached to the insert (1), the column concrete is poured, the column (Bl) is constructed, and the stud +
Bl to the seismic saint with anchor (6) and cotter (3)
].

Note that the anchor (6) may be attached before the earthquake-resistant saint is erected.

(C) in the figure shows a beam.

(Effects of the Invention) According to the present invention, as described above, inside the joint end of the precast concrete shear wall to the concrete frame,
By burying the inserts for attaching the anchors to the building frame and placing the reinforcement of the shear wall within the wall,
When manufacturing a precast shear wall, the reinforcing bars of the shear wall are no longer involved in the side formwork, making it easier to arrange reinforcement and demolding, and also facilitate handling in terms of stocking and transportation. Furthermore, during erection, the shear wall can be lowered regardless of the column reinforcement, making it easier to erect the shear wall.

Further, after the earthquake-resistant wall is erected, a fixing anchor is attached to the insert, and the fixing anchor is attached to the earthquake-resistant wall and integrated with it.
By placing the body concrete, the body concrete and the earthquake-resistant wall are integrated via the anchors.

Furthermore, in terms of structural strength, by intensively performing reinforcement commensurate with the stress, we will ensure a strength equivalent to that of anchoring wall reinforcements directly within the building frame, or create an anchor structure that reduces stress in proportion to it. You can also do that.

[Brief explanation of drawings]

1 and 2 are a cross-sectional plan view and a front view, respectively, showing the implementation status of an embodiment of the method of joining a precast concrete shear wall and a concrete frame according to the present invention, and FIG. A vertical cross-sectional view showing the constructed frame,
FIG. 4 is a front view showing a joint between a conventional precast concrete shear wall and a concrete frame. Prisoner... Precast concrete shear wall, (Bl...
・Column, (1)...Insert, (6)-...Anchor agent Patent attorney Shige Okamoto 1 person outside of the text Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] After erecting a precast concrete shear wall with an insert embedded inside the joint end to the concrete frame, an anchor for fixing to the frame side is attached to the insert, and then concrete for the frame is poured integrally with the shear wall. A method of joining a precast concrete shear wall and a concrete frame.