JPH0119697Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water stop plate to be used at a joint between old and new concrete structures.

As is well known, when constructing a concrete structure by pouring concrete, especially when constructing a structure by pouring joints, the concrete volume may shrink due to changes in temperature or moisture or drying at the joints of the structure. In order to prevent cracks that occur in concrete due to factors such as uneven settlement of concrete, load, or vibration, expandable joints are provided at appropriate intervals. At this joint, a band-shaped water stop plate is used that spans and connects the joint between the old and new concrete. This water stop plate prevents rainwater, spring water, and other water from entering the joint.

This water stop plate is often made of vinyl chloride resin, but when looking at the cross section of the water stop plate, conventional water stop plates of this type have left and right sides centered around the curved part provided in the center. It is symmetrical. For example, what is called an uncut corrugate is shown in FIG. As shown in Fig. 1, if only half of the water stop plate 2 is embedded in the concrete 1 that has already been poured as shown by the chain line, it is natural to use the conventional method when pouring new concrete 3 therein. The water stop plate 2 in the example is fine, but if you want to add unplanned concrete to the existing concrete 1 in which the water stop plate 2 has not been embedded, use the existing concrete 1.
When the water stop plate 2 is attached as shown by the solid line, the concrete anchor 4 and the sealing material 5 are used, so the shape and size of the conventional water stop plate 2 may create an unnecessary part, and the sealing material and Because of this, there was a problem that the water stop plate 2 was not reliable enough to prevent water seepage after it was installed.

Therefore, the present invention was devised in an attempt to eliminate these problems, and in particular, the purpose is to improve a water stop plate in which an inverted conical protrusion is provided on only one side of the water stop plate. do.

Hereinafter, the embodiment of the present invention shown in FIG. 2 will be described in detail. FIG. 2 shows a cross section of the water stop plate 2, which is a band-shaped body with a length of 10 to 20 m. Note that the same or equivalent parts as in FIG. 1 are indicated by the same reference numerals.

The base plate 6 of the water stop plate 2 is provided with a U-shaped protrusion 7 in the middle, which allows the base plate 6 to be bent as shown. Several protruding stripes 8, 8 are provided in parallel only on one side (upper surface) of the substrate 6 on one side with the protruding portion 7 in the middle, and a nailing wing 9 is provided at the tip.
An embedding plate portion 10 is formed. The protruding strips 8, 8
has an inverted conical cross-sectional shape, and has serrated surfaces 11 carved on both sides thereof. Tooth 1 of serrated surface 11
2 is pointing downwards. Therefore, if the substrate 6 is discarded and the protruding strips 8, 8 are placed on the upper surface of the concrete 13 and concrete is poured, the protruding strips 8 placed adjacent to the substrate 6 will form a gutter, Not only does it serve as a receiver for permeated water, but the teeth on the serrated surface 11 also provide good engagement with concrete.
Further, on the other side of the protruding portion 7, a sawtooth surface 14 is provided on one side (lower surface) of the substrate 6, and a hook-shaped edge flange 15 is provided at the tip to form an attachment plate portion 16. The attachment plate portion 16 is shorter than the embedding plate portion 10. 17 is concrete anchor 4
The positioning mark 18 is a steel plate, and the sealing material is an unvulcanized butyl rubber seal 19 to ensure good adhesion to concrete. Reference numeral 20 denotes a fixing flange protruding from the outer periphery of the protrusion 7, which locks the fixing fitting 21 and connects it to the newly installed formwork 22.

With the above configuration, the concrete anchor 4 is planted in the existing concrete 1, and the primer 23 is used to smooth the surface of the concrete near the concrete anchor 4.
administer. An unvulcanized butyl rubber sheet 19 is inserted into the concrete anchor 4 and brought into contact with the primer 23. Next, a water stop plate 2 is placed on the rubber sheet 19 side.
The serrated surface 14 of the water stop plate 2 is inserted into and abuts on the concrete anchor 4, while the embedding plate part 10 of the water stop plate 2
It is bent at the protruding portion 7 in order to place it on the upper surface of the concrete 13 with the protruding strips 8, 8 facing upward. A band-shaped steel plate 18 is brought into contact with the attachment plate part 16 from the outside,
Finally, screw and tighten the anchor nut. As a result, the hook-shaped edge flange 15, the serrated surface 14 and the existing concrete surface form a pocket, which contains an unvulcanized butyl rubber seal 19 and is filled by tightening the anchor nut.

If a flange similar to the edge flange 15 is provided at a lower position symmetrical to the illustrated edge flange 15 with the concrete anchor 4 as the center, a liquid sealing material or the like can be stored.

Incidentally, the work of pouring concrete into the embedding plate portion 10 of the substrate 6 is carried out in the conventional manner.

The present invention has the following effects.

(1) When attaching a water stop plate to existing concrete, the serrated surface for joining the sealant on the attachment plate of the water stop plate presses the sealant and attaches it to the concrete, so extra space is created. The water stop plate can be attached closely without causing any damage.

(2) Since no extra space is created, seepage water can be stopped reliably.

(3) Several inverted cone-shaped protrusions are provided only on the top surface of the embedded board, so the water stop plate functions as a gutter, ensuring a water stop effect at joints such as floors. is obtained. It meshes well with concrete and does not come off.

(4) Since both the embedding plate part and the attachment plate part have a perfect water-stopping effect, the reliability of the water-stopping board is further improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the conventional example in use, and FIG. 2 is a sectional view of the embodiment of the present invention in use. 2 is a water stop plate, 7 is a protrusion, 8, 8 is a protrusion, 1
0 is a plate for embedding, 14 is a serrated surface, and 16 is a plate for attachment.

Claims (1)

[Scope of utility model registration request] It is a synthetic resin water stop plate used when pouring new concrete onto existing concrete, and consists of a relatively flat attachment plate that is fixed along the existing concrete wall, and a buried plate that is embedded in the new concrete. The embedding plate portion is composed of a protruding portion having a substantially U-shaped cross section that bendably connects the attachment plate portion and the embedding plate portion, and the attachment plate portion is attached to the existing concrete wall with a separately prepared seal. a barbed edge flange and an adjacent serrated surface on the opposite side of the U-shaped projection suitable for engagement through the U-shaped projection; It has a plurality of inverted cone-shaped protrusions extending in parallel at intervals on the same side as the letter-shaped protrusion, and the width of the attachment plate part is smaller than the width of the embedding plate part. A water stop plate for connecting old and new concrete.