JP2678720B2 - Water stop plate connection method and connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a method for connecting a water stop plate made of a non-water swellable material such as soft vinyl chloride and a water stop plate made of a water swellable material in civil engineering and construction work, and to this method. It relates to a water stop plate connector.

[0002]

BACKGROUND OF THE INVENTION Waterstops are used in the joints of concrete structures to prevent water leakage. In the early days, waterstops were made from iron and copper tapes, which were sometimes crimped to give them more flexibility. A composite of rubber and mild steel plate protruding from the rubber was also used.
Recently, a flexible waterproof with two or more key ribs extending along and protruding from the tape to wedge the tape into the concrete on both sides of the seam to be sealed. Tape-like materials have been used. Such waterproof plates are usually made of rubber, plastic materials, etc., and PVC is the most widely used at present. Even more recently, waterstops of hydrophilic or water-swellable materials have been commercialized and used. These waterstops utilize the ability of the material to expand upon contact with water to prevent the passage of water at joints or discontinuities in concrete structures. Examples of the material used for the water-swellable water blocking plate include a water-swellable polyurethane elastomer, a compound of butyl rubber and bentonite soda, and a rubber containing a water-absorbent resin.

[0003]

For certain applications, it is desirable to use a water-stop plate made of a non-water-swellable material such as ordinary rubber or soft vinyl chloride and a water-swellable water stop plate. However, it is usually difficult to completely connect the two water blocking plates to prevent the passage of water in the system using the two types of water blocking plates.

One example is deep foundation work in confined areas such as digging pile walls or trenches and then burying concrete. Usually the depressions or protrusions are located in the wall at the location of the foundation or floor slab. Since the walls are made of hardened concrete, it is not easy to install ordinary PVC water blocking plates. Builders are trying to achieve water stoppage by installing a junction and wrapping a PVC waterstop in cast-in-place waterproof mortar. However, this is not a good solution as it relies entirely on the skill of the operator under difficult conditions. Therefore, it is important to develop a complete method of connecting the water-swellable water-stop plate and the non-water-swellable water-stop plate so that each of the two types of water-stop plates can be used in a more suitable place and in a more convenient manner. It can be divided, which is a great advantage. That is, a hydrophilic or water-swellable water stop plate can be used at the junction between the wall and the foundation slab, and a normal external or rear installed PVC water stop plate can be used at the foundation slab itself.

[0005]

Means for Solving the Problems The inventors of the present invention have made extensive studies in order to solve the above problems, and as a result, have found that water leakage between a water stop plate made of a non-water-expandable material and a water stop plate made of a water-expandable material. We have found a connection method that is extremely effective for prevention and the connector used for this connection.

An object of the present invention is to provide a method for connecting two types of water blocking plates, one of which is made of a non-water swellable material and the other of which is made of a water swellable material. At least two or more ribs are arranged at intervals on one surface of the tape-shaped product of the expansive material, and a strip-shaped product made of a water-expandable material is crossed with the tape-shaped product at the end of the rib. This is a method of adhesively bonding and further fixing the strip-shaped product to a water-swellable water blocking plate.

Another object of the present invention is to provide a connector for connecting two water blocking plates, one of which is made of a non-water-expandable material and the other of which is made of a water-expandable material. a tape-like article of the non-aqueous swellable material which arranged a plurality of ribs spaced apart on one side in the manner, and the tape-like article
It consists of strips of water-swellable material that intersect and are adhesively bonded to the rib ends.

The tape-shaped article made of the non-water-expandable material in the present invention may be the non-water-expandable water stop plate itself, or may be a part of the connector fixed to the non-water-expandable material water stop plate. May be. In the former case, the method of the present invention can be carried out at a construction site. Also in the latter case it is adhesively bonded to a strip of water-expandable material to provide a prefabricated connector which is substantially secured to the two waterstops.

The strip of water-swellable material is bonded to the end of a tape-shaped piece of non-water-swellable material. The strip-shaped product may be formed of a part of the water blocking plate made of a water-swellable material. In any case, it is preferable that the tape-shaped product of the non-water-expandable material and the strip-shaped product of the water-expandable material are bonded to each other at the low position portion of the rib of the tape-shaped product of the non-water-expandable material.

The strips of water-swellable material are located intersecting with the tape-shaped articles of non-water-swellable material, the strips being the ends of the ribs of the tape-shaped article and the ends of the tape-shaped article. It may also consist of a part of a tape-like article joined to the part.

As a preferred structure, the rib of the tape-shaped product made of a non-water-expandable material has a protruding portion beyond the end of the tape-shaped product, and the strip-shaped product made of the water-expandable material has a protruding part of the rib. An example is one having an L-shaped portion composed of a vertical portion joined to the portion and a horizontal portion joined to the lower surface of the rib protruding portion. In the above structure, it is more preferable that the two different materials are adhered at a large number of points in order to improve the connection performance of the connector.

Examples of the non-water swellable material include rubber such as natural rubber and styrene-butadiene type synthetic rubber, and flexible plastic such as soft vinyl chloride. Soft vinyl chloride is preferred.

Examples of the water-swellable material of the present invention include rubber containing a water-absorbent resin, flexible plastic, and water-swellable polyurethane elastomer. Examples of the water absorbent resin include acrylic acid-based resins such as sodium polyacrylate, carboxymethyl cellulose, polyethylene glycol modified products (urethane modified, epoxy modified, etc.), bentonite soda and the like. Examples of the rubber that serves as the matrix and the flexible plastic include natural rubber, butyl rubber, chloroprene rubber, styrene-butadiene copolymer rubber, and soft vinyl chloride. When a water-swellable polyurethane elastomer is used as the water-swellable material, it is not necessary to use a water-absorbing resin. For example, as the isocyanate, for example, an aliphatic or alicyclic polyisocyanate is used, and a hydrophilic segment (for example, an oxyethylene group) in the chemical structure is used.
Examples thereof include a polyurethane elastomer exhibiting water swelling property. Such a polyurethane elastomer exhibits a stable coefficient of water expansion even in water containing metal ions, and since the rate does not decrease even after long-term immersion, it exhibits an excellent water blocking effect. Examples of such a polyurethane elastomer include Aquaprene (manufactured by Sanyo Chemical Industries). Among such water-swellable polyurethane elastomers, those having a water expansion coefficient of 1.2 to 2.5 times are preferable. These elastomers can be easily bonded to vinyl chloride with a polyurethane adhesive.

The non-water swelling water blocking plate made of rubber or soft vinyl chloride has a water blocking plate having protrusions such as ribs on only one surface of the tape-shaped product, and protrusions such as ribs on the upper and lower surfaces of the tape-shaped product. There is a water stop plate, and the present invention relates to the water stop plate. Further, the number, shape and placement of the ribs on the tape of non-water swellable material can be optionally varied to suit the design of the waterstop used with the connector.

The tape-like article of non-water-expandable material may have a plurality of small ribs extending only along the tape-like article, in addition to the ribs extending and projecting from the ends of the tape. .

The connector of the present invention is a non-water-expandable water-stop plate and a non-water-expandable material for a connector by adhesive bonding in the case of a water-expandable water-stop plate and a strip-shaped product made of the water-expandable material for the connector. In the case of the tape-like product, the two types of water-stopping plates, which are water-swellable and non-water-swellable, can be easily connected by heat fusion.

The connector of the present invention can connect two types of water blocking plates not only in the applications described above in the prior art but also in the construction of pile caps or lock caps in which the reinforcing material prevents the use of ordinary water blocking plates. You can

[0018]

Embodiments will be described in more detail with reference to FIG. FIG. 1 is a schematic view showing a typical example of a connector for connecting two water blocking plates, one of which is a non-water swellable material and the other of which is a water swellable material.

Connector 1 for connecting a water blocking plate made of soft vinyl chloride and a water blocking plate made of water-swelling polyurethane elastomer 1
Are four ribs 3 to 6 each having a bulb-shaped top 8 on one side 7.
And fins 9 located at the center of the tape-shaped article at the same height as these ribs, and flanges 10 at the end portions on both sides.
have. The flange 10 prevents the connector 1 from tearing due to this thickness when nailing and fixing the concrete to the concrete by passing the connector therethrough. Ribs 3, 4, 5, 6
The tip portions of the fins 9 project beyond the end portion 11 of the tape-shaped product 2 to form a protruding end portion 17. The four small ribs are located on the upper surface of the tape-like product 2 between the ribs 3 and 4, and between the ribs 5 and 6, and the effect of extending the channel on the passage of water together with the ribs 3, 4, 5, 6 and the fins 9. Increase. The vertical portion 15 and the horizontal portion 16 form an L-shaped portion 14. Strips of water-swellable polyurethane elastomer 13
Is the vertical portion 15 on the vertical end surface 18 of the protruding end portion 17,
The horizontal portion 16 is fixed to the lower surface 19 of the protruding end portion 17, the end portion 20 is fixed to the end portion 11 of the tape-shaped product 2, and the tape-shaped product 2 is fixed to the tape-shaped product 2 by a combination of three kinds of bonds.

In practicing the present invention, a tape-shaped article of non-water-expandable material can be fixed to a PVC water stop plate, for example, by heat fusion, and a strip-shaped article of water-expandable material is made of synthetic rubber or an elastomer solution adhesive. It can be fixed to a water-stop plate made of water-swellable polyurethane elastomer.

[0021]

EFFECTS OF THE INVENTION By implementing the water-stop plate connecting method and connector of the present invention, it is possible to eliminate water leakage at the connecting points of the water-stop plate made of a non-water-expandable material and the water-stop plate made of a water-expandable material. be able to.

[Brief description of the drawings]

FIG. 1 is a schematic view of a connector of the present invention.

[Explanation of symbols]

 1 Connector 2 Tape-shaped product of non-water-expandable material 3-6 Rib on tape-shaped product of non-water-expandable material 7 One side of tape-shaped product of non-water-expandable material 8 On tape-shaped product of non-water-expandable material Valve-shaped top 9 of non-water-expandable material tape-like fin 10 Flange on non-water-expandable material tape-like article 11 End of non-water-expandable material tape-like article 12 Non-water-expandable material Small ribs on the tape-shaped product 13 Strip-shaped product 14 L-shaped part of the strip-shaped product 15 Vertical part of the strip-shaped product 16 Horizontal part of the strip-shaped product 17 Projected end of the strip-shaped product 18 Vertical end face of the strip-shaped product 19 Bottom surface of strip

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yutaka Kawahara 11-11, Hitotsubashi-honcho, Higashiyama-ku, Kyoto Sanyo Kasei Kogyo Co., Ltd. (56) Reference Japanese Patent Publication 3-74298 (JP, B2) 3-7442 (JP, Y2)

Claims (13)

(57) [Claims] 1. A tape-shaped article made of a non-water-expandable material having at least two ribs arranged at intervals on one surface thereof, and a strip-shaped article made of a water-expandable material intersecting the tape-shaped article. Two kinds of water blocking plates, a non-water-expanding water blocking plate and a water-expanding water blocking plate, characterized in that the strip-shaped article is fixed to the water-expanding water blocking plate by adhesively bonding to the rib ends. How to connect. 2. The connecting method according to claim 1, wherein the tape-shaped article made of a non-water swellable material is a non-water swellable water blocking plate. 3. The method of connecting according to claim 1, wherein a tape-like article of non-water swellable material forms part of the connector and is secured to the non-water swellable water stop plate. 4. A tape-shaped product made of a non-water-expandable material having at least two ribs arranged at intervals on one surface, and a strip-shaped product made of the water-expandable material intersecting the tape-shaped product. Two kinds of water blocking plates, a non-water-expanding water blocking plate and a water-expanding water blocking plate, characterized in that the strip-shaped article is fixed to the water-expanding water blocking plate by adhesively bonding to the rib ends. A connector for connecting. 5. A strip-shaped article made of a water-swellable material is constituted by a part of a water stop plate made of a water-swellable material, which is bonded to an end of a tape-shaped article made of a non-water-swellable material. The connector according to Item 4. 6. A tape-shaped product made of a non-water-expandable material and a strip-shaped product made of a water-expandable material are connected to each other at a lower position of a rib end portion of the non-water-expandable material tape-shaped product. Claim 4
Or the connector according to item 5. 7. A strip-shaped portion of the water-swellable material is located so as to intersect the tape-shaped product of the non-water-swellable substance, and the rib end and the main body end of the tape-shaped product of the non-water-swellable material are located. The connector according to any one of claims 4 to 6, which is a joined tape-shaped product. 8. A rib on a tape-shaped article of non-water-expandable material has a protruding portion beyond one end of the tape-shaped article, and a strip-shaped article of water-expandable material is composed of a vertical portion and a horizontal portion. 8. The connector according to claim 4, wherein the connector has an L-shaped shape, the vertical portion is connected to a protruding portion of the rib, and the horizontal portion is connected to a lower portion of the protruding portion. 9. The connector according to claim 4, wherein the non-water-swellable material is rubber or flexible plastic. 10. The connector according to claim 4, wherein the flexible plastic is soft vinyl chloride. 11. The connector according to claim 4, wherein the water-swellable material is a rubber containing a water-absorbent resin or a flexible plastic. 12. The connector according to claim 4, wherein the water-swellable material is a water-swellable polyurethane elastomer having a hydrophilic segment in its chemical structure. 13. The connector according to claim 12, wherein the water-swellable polyurethane elastomer has a water expansion ratio of 1.2 to 2.5 times in water.