JPS6042105Y2 - Joint water stop material - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a member that fills the space at the joint surfaces of structures such as concrete and shuts off water between them in civil engineering work, construction work, etc.

Conventionally, when constructing an embankment or a fence culvert, bituminous material such as asphalt is filled as a joint 2 between the joint end surfaces of adjacent structures 1, 1, as shown in FIG.
If further water stoppage is required, a waterstop plate 3 made of plastic, rubber, etc. is inserted in a direction perpendicular to the joint end surfaces.

However, bituminous materials such as asphalt can be easily constructed by filling the gaps in a molten state, but on the other hand, after hardening, it is difficult to deal with deformation or displacement of the structure 1, 1, and during that time, This may result in gaps.

In addition, the water stop plate 3 blocks the above-mentioned gap that occurs between the structures 1, 1, so-called water channels, and prevents water on the negative side from leaking to the other side. structure 1,1
Due to deformation or inequality, so-called looseness is likely to occur between the bodies 1 and 1.

Therefore, in the end, it is difficult to block off the water path, and on the contrary, a new water path is formed around the water stop plate, resulting in a decline in the water stop function over time.

Given this situation, in recent years, joint materials and retaining materials with adhesive layers have been proposed, but in this case, sufficient effects can be expected in the short term), while in the civil engineering and construction sectors, long-term In the case of products intended for use in , there is a problem that the water-stopping function will deteriorate in the event that the adhesive layer ruptures or the adhesiveness deteriorates.

This idea was made as a result of consideration in view of the conventional problems, and in addition to strengthening the joint compensation function,
The aim is to maintain the water-stop function over a long period of time.

Hereinafter, the configuration of this invention will be explained in detail based on an illustrated embodiment.

As shown in Fig. 2, the joint sealing lumber according to this invention is mainly made of a water-repellent elastic foam 10 with closed cells, and has water-repellent properties on at least one direction of one or both sides of the foam. Swellable waterstops 11, 11 are attached, and adhesive layers 12, 12 are formed on these surfaces.

The foam 10 is generally formed into a plate shape, but in the one shown in FIG.
11 is fitted, and a release sheet 13 is further attached to the adhesive surface.
．． 13 is alms.

The foam 10 is formed by foaming rubber, resin, or a mixture thereof, and rubber-based materials include natural rubber, butyl rubber, SBR, etc., and swelling-based materials include polyethylene, polypropylene, and ethylene acetate. Vinyl copolymers and the like are used.

On the other hand, the adhesive layer 12 is preferably made of rubber, especially natural rubber or butyl rubber, and these materials may be plasticized with a solvent such as asphalt and applied to the surface of the foam 1, or
It is best to form a thin plate-like material with adhesive.

In addition, the water stopband 11 is preferably formed by mixing natural comb with a water-expandable material such as a fiber material and vulcanizing it. In general, the water stopband 11 is formed by mixing a water-expandable material such as a fiber material with natural comb and vulcanizing it. In many cases, the volume increases by 2 to 4 times while maintaining elasticity.

Next, a method of using the joint lumber according to this invention will be explained.

Figure 3 shows an example where the application is applied to the joint between cast-in-place concrete structures a and b. Paste it on the surface.

Next, the other release paper 13 is peeled off, and concrete is poured on this side to construct a structure.

As concrete hardens as it cures, the adhesive surface adheres to the joint surface of the structure.

The foam 10 has closed cells and is water repellent, so it does not allow water to pass through and stops water between the jointed end faces.It also has elasticity, so it is suitable for structures a and b during and after pouring.
It is possible to deal with deformations and deviations between them.

Figure 4 shows this state, where A is the structure a and b.
deviate from each other in the thickness direction, and the figure shows a case in which the angles of structures a and b shift, and in both cases, the adhesive layer 12°12 adheres to the bonding surface of structures a and b. m) The foam 10 deforms to accommodate this shift.

In the case of good adhesion, the adhesive layer 12.12 will adhere to the joint surfaces of the structures a and b for a long time, but the water stopper 11.
11 expands when it contains water, so it is pressed by the foam 10 behind it and adheres closely to the bonding surface. Therefore, in the unlikely event that the adhesive layer 12
．． Even if 12 is peeled off from the joint surface, the water stop function is maintained.

In particular, when the tourniquets 11, 11 are fitted into the grooves formed in the foam 10, the expansion causes the tourniquets 11, 11 to firmly fit and be held in the grooves, and the elasticity of the foam 10 can be effectively applied from the surroundings.

FIG. 5 shows an example of application in the case of constructing a waterway or tunnel by joining hume pipes as a precast product, but it can also be used, for example, for filling joints between segments in the shield construction method.

As mentioned above, when using the jointing lumber of this invention, it adheres closely to the joint surfaces of structures a and b in response to deformation or misalignment, so it does not create so-called water channels and is completely maintained over a long period of time. Maintains water-stop function.

In addition, even if the adhesive layer 12 should peel off, the expanded water stopbands 11, 11 will elastically press the foam 10 from behind.
Since it is in close contact with the joint surfaces of structures a and b, the water stop function is not lost due to the above-mentioned peeling.

Furthermore, since the joint and the lumber are integrated, construction is easier than if they were handled separately, and the intended purpose can be achieved even further.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional plan view showing an example of a conventional joint and water-stopping structure, Fig. 2 is a perspective view showing an example of this invention, Fig. 3,
FIG. 4 is a cross-sectional plan view showing an example of use of the joint waterstop plate of this invention, and FIG. 5 is a vertical cross-sectional side view of the same. 10... Foam, 11... Water stopper, 1
2... Adhesive layer, a, b... Structure.

Claims (1)

[Claims for Utility Model Registration] ■ The main material is a water-repellent elastic foam with closed cells, and a water-swellable tourniquet is provided on at least one side of the foam. A jointing lumber characterized by being attached and having an adhesive layer formed on the same side. 2. The joint sealing wood according to claim 1, in which the adhesive layer is made of a rubber adhesive such as butyl rubber. 3. The joint lumber according to claim 1 or 2 of the utility model registration claim, in which a groove is formed on the surface of the foam and a waterstop is fitted into the groove.