JPH0122040Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is a construction joint that is installed in advance within the wall formwork and forms an appropriate cross-sectional defect in the concrete wall to prevent bending damage of short columns during earthquakes. It is provided as a low-cost joint material that can be easily and freely adapted to wall thickness, and has excellent workability.

Conventionally, when constructing slit walls, a type of joint material that completely edges the concrete wall in the wall thickness direction has been used, but it has poor workability when attached to the wall formwork in advance, especially when the wall thickness In order to accommodate variations, it is necessary to prepare joint material of a predetermined width each time, which further increases costs and is actually uneconomical.

This invention was made to eliminate the above-mentioned conventional drawbacks, and its structure will now be explained based on the drawings.

FIG. 1 shows a support piece 1 according to a first embodiment of this invention.
and a perspective view of a part of the elastic joint main body 2, respectively.

The support piece 1 made of synthetic resin or aluminum is integrally provided with a joint groove 1a along the longitudinal direction of the front surface and a joint main introduction groove 1b along the longitudinal direction of the back surface, and extends on both left and right sides. and leg piece 1c, 1
C is prominent.

Further, the outer surface from the joint groove 1a to the leg piece 1c is covered with a soft finishing material 1d such as soft vinyl chloride, and arbitrary small protrusions 1e are opposed to the inner wall surface of the joint main introduction groove 1b. It is formed as follows.

The elastic joint main body 2 inserted into the joint main introduction groove 1b of the support piece 1 is made of elastite, sponge,
It is mainly made of styrofoam, etc., and is formed into a long length with a desired width (1/6 or less of one side of the column, and a width that can form an effective concrete cross section of 10 cm or less).

The construction joint material of this invention having the above structure is arranged independently on the same axis along the inner surface of the inner formwork P1 and the outer formwork P2 of the wall as shown in FIG. This is done by attaching it with nails A (or adhesive).

In this case, if the wall to be constructed is 1/6 or less of the side of the column and is connected with an effective concrete cross section of 10 cm or less, there is no need to completely cut the edges mainly by joints, so it has little effect on changes in wall thickness. Instead, the initial objective can be achieved simply by inserting the same elastic joint body with a predetermined width into each of the support pieces on both sides.

FIG. 3 is a plan view showing a second embodiment of this invention.If the joint groove of the support piece 11 is omitted and the support piece 11 is formed flat, it can be used inside a wall.

Furthermore, when nailing the support piece 1 to the formwork, if nails made of reinforced plastic are used, the surface can be easily finished by simply breaking off the nails, and the rust prevention effect is great.

FIG. 4 is a plan view showing a third embodiment of this invention, in which a flange 21a is provided on the outer surface of the joint main introduction groove 21b of the support piece 21, and according to this, it can be used as a concrete anchor or as a water stop. It can be expected to function as a holder, and is also convenient for nailing.

As described above, according to this invention, it is possible to easily construct a slit wall, and in particular, by arranging independent joint materials on the inside and outside of the wall, it is possible to adjust the joint material each time according to the thickness of the wall. It is economical because there is no need to prepare a joint, it can be constructed rationally, and it does not require a main joint with a width that completely borders the axis of the wall.

Furthermore, by passing reinforcing bars within the effective cross section of the wall, it is possible to impart rigidity to the concrete between the column and the wall, and at the same time, it has the effect of preventing the axis of the wall from shifting during an earthquake.

Furthermore, by providing a predetermined effective cross section, secondary effects such as high soundproofing and moistureproofing properties can be expected as a normal structure.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a support piece and a part of the elastic joint main body related to the construction joint material of this invention, Fig. 2 is a usage state diagram of the same as above, and Fig. 3 is a plan view of the second embodiment. FIG. 4 is a plan view of the third embodiment. 1... Support piece, 1b... Joint main introduction groove, 2...
...Mainly elastic joints, P1, P2...Inner formwork, outer formwork.

Claims (1)

[Scope of utility model registration request] A joint material disposed along opposing side walls, consisting of a support piece having a joint main introduction groove along the longitudinal direction of the back surface, and an elastic joint main body inserted into and supported by the joint main introduction groove. A construction joint material characterized by: