JPH0627948U - Water stop plate for expansion joint - Google Patents

Abstract

(57) [Summary] [Purpose] A water stop plate for stretch joints of concrete structures with excellent water stop effect. [Structure] A water stop plate for expansion and contraction joints of a concrete structure, in which a strip-shaped plate (2) made of rubber or synthetic resin is bonded with metal plates (3) such as strip-shaped iron plates at both ends of the cross section. [Effect] Even if a conventional water-stop plate made of rubber or synthetic resin is embedded in fresh concrete, its water-stopping effect is small because it has poor adhesion to concrete after hardening. For this reason, by combining a metal plate such as an iron plate, which has good adhesion with concrete, with a rubber or synthetic resin plate, the water blocking effect is improved.

Description

[Detailed Description of the Invention] "Industrial field of application" The present invention relates to a water stop plate used for expansion and contraction joints of concrete structures such as concrete walls and concrete tunnels requiring water stop.

 "Prior art" Conventional water-stop plates for expansion and contraction joints of concrete structures are entirely made of rubber or synthetic resin, and the shape is a strip plate as shown in Fig. 1, and the cross section is shown in (a). As shown in the figure, there are those in which both ends are spherical, those in which a hollow protrusion is provided in the center as shown in B, and those in which a corrugated protrusion is provided between the center and both ends as shown in C.

 [Problems to be solved by the invention] Although the rubber or synthetic resin water blocking plate itself has elasticity or water stopping properties, it has the following drawbacks when used for expansion joints of concrete structures.

 When the water stop plate is used as a stretch joint for a concrete structure, both ends of the water stop plate are embedded in the concrete around the joint (1) of the concrete as shown in Fig. 2. In order to embed a water stop plate in concrete, the water stop plate is set in the formwork in advance, and the fresh concrete is poured and then embedded by hardening the fresh concrete. However, it is very difficult to bond a hard material such as concrete to an elastic material such as rubber or synthetic resin, and it easily peels off due to the expansion and contraction, creating a gap between the concrete and the water blocking plate. However, there was a drawback in that water could not be maintained because the water flowed along the surface of the water blocking plate to the opposite side.

 In addition, if the water blocking plate has spherical cross-sections at both ends, and if corrugated protrusions are provided between the center and both ends, the surface distance can be lengthened to increase the adhesive area with concrete, and Even if the adhesive is peeled off, it is designed to maintain a certain level of waterproofness by adhering to the concrete. However, concrete structures made by pouring ready-mixed concrete can easily form nests due to gravel, bubbles, etc., and the surface does not become smooth, so the waterproofing effect due to adhesion cannot be expected.

 The present invention has been made to eliminate these drawbacks, and an object thereof is to provide a better water blocking plate.

 "Means for Solving the Problem" As shown in FIG. 3, a concrete structure made by adhering metal plates (3) such as strip-shaped iron plates to both ends of a cross section of a strip plate (2) made of rubber or synthetic resin. Water stop for expansion joints. As a method of adhering the metal plate (3) such as a strip-shaped iron plate to the both ends of the cross section of the strip-shaped plate (2) made of rubber or synthetic resin, a method of directly adhering it or a plate made of rubber or synthetic resin is used. When molding into a shape, there is a method in which a metal plate such as an iron plate is previously placed in a mold and simultaneously molded and bonded.

 "Function" It is well known that a metal such as an iron plate firmly adheres to concrete, and a metal such as an iron plate and rubber or a synthetic resin also firmly adhere to each other. When this water stop plate is used, both ends of the water stop plate are embedded in concrete with the joint (1) as the center, as shown in FIG. In the part of (), it firmly adheres to the concrete and does not easily come off, and it stops water. In the part of the strip (2) made of rubber or synthetic resin, it absorbs the expansion and contraction of the concrete structure and stops the water. I do.

 "Example" Hereinafter, an example of the present invention will be described.

 As shown in FIG. 3, a water seal plate for expansion and contraction joints of a concrete structure, which is formed by adhering a metal plate (3) such as a strip-shaped iron plate to both ends of a cross section of a strip plate (2) made of rubber or synthetic resin, When this is used, both ends of the water stop plate are embedded in concrete with the joint (1) as the center, as shown in FIG. Then, it firmly adheres to the concrete, does not come off easily, and stops the water. The strip-shaped plate (2) made of rubber or synthetic resin absorbs the expansion and contraction of the concrete structure and stops the water. .

 Furthermore, the metal plate (3) such as a strip-shaped iron plate adhered to both ends of the cross section is made into a corrugated shape (4), which makes it easy to bend longitudinally, and after productizing, it is easy to wind, easy to transport, and put in place. You can do it without any trouble.

 Furthermore, small holes (5) are longitudinally formed at appropriate intervals at locations near the outside of the metal plate (3) such as a strip-shaped iron plate adhered to both ends of the cross section, and the iron wire ( 6) It is also possible to fix the water blocking plate by bundling it through the rebar to the rebar (7) in the concrete structure, the formwork, etc.

As a result, the conventional water stop plate is entirely made of rubber or synthetic resin, so it is difficult to fix because it is not self-supporting, and it is impossible to make holes in the water stop plate itself because it impairs the water stop. With this method, it is possible to fix it easily.

 "Effect of the device" This is a water stop plate for expansion and contraction joints of concrete structures that has a large adhesive force with concrete and is also elastic.

 In addition, by making a metal plate such as a band-shaped iron plate corrugated, it is a water stop plate that is easy to bend and convenient to transport, and does not take up much space for storage. In addition, it is a water stop plate that can be easily fixed by making small holes in a band-shaped metal plate such as an iron plate and binding it to a reinforcing bar or formwork in a concrete structure with an iron wire or the like.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a conventional product, FIG. 2 is a partial perspective view of a conventional product in use, and FIG. 3 is a partial perspective view of the product of the present invention.
FIG. 4 is a partial perspective view showing a usage state of the device of the present invention. (1) is a stretch joint of a concrete structure, (2) is a strip of rubber or synthetic resin, (3) is a metal plate such as an iron plate,
(4) corrugated, (5) small hole, (6) iron wire, (7) rebar

Claims (1)

[Scope of utility model registration request] Waterstop plate for expansion and contraction joints of concrete structures, which is made by adhering strip-shaped metal plates (3) such as strip-shaped iron plates to both ends of a strip-shaped plate (2) made of rubber or synthetic resin.