JPS6323520Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water stop member for joints for treating water leakage from concrete joints in tunnels.

For example, in an arch-shaped tunnel 1 as shown in Fig. 1, to treat water leakage from the concrete joint, a joint groove 2 is provided as shown in Fig. 2, and a rubber water-stop member is installed here. It is inserted to guide water leaking from the seam 3 to the drainage ditch 5 without leaking to the outside.

An example of such a water stop member is the water stop member 9.
consists of a side wall 6 and a leg part 8 of a gutter part 7 with a plurality of fins 6a, 6a'... formed on the outside, and by pressing the water stop member 9 into the joint groove 2 while hitting the leg part 8 with a hammer etc. The foot part 8 is fixed to the groove 2 while being curved, and water leaking from the joint 3 is collected in the gutter part 7 and drained to the drainage groove 5 at another location.

In the figure, 10 indicates a sponge inserted between the foot 8 and the fin, and 11 indicates a caulking material filled at the interface between the foot 8 and concrete.

In such a conventional water stop member 9, when there is a lot of spring water, water is stopped using the sponge 10 in addition to the fins 6a, 6a'... and the end of the foot 8, but it is still not completely effective. In addition, the shape of the fins 6a, 6a', etc. is complicated and manufacturing is troublesome, and there is a risk that these parts may become fragile parts that are easily broken.
There is also a risk of leaving.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
To provide a water-stopping member for tunnel joints which has an enhanced water-stopping effect, is solid as a whole, and takes into consideration prevention of peeling of an adhesive used as a caulking material.

According to the present invention, this object is achieved by providing a water-stopping component that is gutter-shaped with a roughly U-shaped cross section and is pressed into a joint, by providing a longitudinal groove on the outer surface of the gutter side wall to accommodate a water-swellable sealant, by providing a notched groove at the lower level of the groove through which a pressure-welding protrusion is integrally protruded, and by integrally molding a protrusion for preventing peeling into the adhesive-filled section consisting of the protrusion and the side surface of the thick plate that constitutes the bottom plate of the gutter.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 3 is a longitudinal sectional front view showing an embodiment of the water stop member 12 of the present invention, in which the main body is made of a material with high compression resilience such as synthetic rubber such as chloroprene rubber or thermoplastic resin such as vinyl chloride resin. It consists of a continuous band-shaped body in the front-back direction in the drawing.

In the figure, reference numerals 13 and 13' denote side walls forming the gutter section 14 inside, which are slightly inclined outward and project from the thick plate body 15 constituting the bottom plate of the gutter section 14. The outer surfaces of the side walls 13, 13' are formed into a flat surface 16, and a groove 17 is provided in the longitudinal direction below the surface. A water-swellable sealing material 18 is placed in this groove 17, and the material of the sealing material 18 is a composition mainly made of a water-swellable polymeric substance such as swelling polyurethane resin or swelling polyvinyl. modified products of polyethylene oxide, styrene-maleic anhydride copolymers, cross-linked polyvinylpyrrolidone products, cross-linked acrylic acid-acrylamide copolymers, hydrolysates of starch-acrylonitrile copolymers, polymeric substances of cellulose derivatives Possible examples include those created using .

A deep notch groove 19 is provided at the lower level of the groove 17, and the deepest part 19a of this groove 19 is formed in a rounded shape without corners to prevent breakage, and the position is between the side walls 13, 13' and the thick plate. The border with body 15 is desirable.
As a part of the lower part of the groove 19, a protrusion 20 for pressure welding is integrally provided on the side of the thick plate body 15, and a protrusion 20 having a bulge 21a at the tip on the lower surface of the protrusion 20 is used to prevent peeling. The protrusion 21 is integrally molded and provided in a protruding manner.

In addition, the space formed as the side surface of the protrusion 20 and the thick plate body 15 is filled with an adhesive 22 as described later.
A marking ridge 23 is formed on the bottom end of the thick plate body 15.
was formed.

Further, although not necessarily necessary, for those used in cold regions, through holes 24 forming a heat insulating layer are provided in parallel in the longitudinal direction.

Next, the usage and effect will be explained.

The water stop member 12 of the present invention is installed in the joint groove 2 having a rectangular cross section.
In order to press-fit the groove 2, as in the conventional example, the side surfaces of the groove 2 are smoothed by removing the seepage of concrete milk, and then the groove 2 is fitted by hitting it with a hammer or the like.

In this case, as shown in FIG.
3' are vertical so that they are close to each other, and the plane 16 is in contact with the side surface of the groove 2, and the sealing material 18 is also in contact with the side surface of the groove 2. Further, in this state, although the opening of the notch groove 19 is widened, the deepest part 19a is rounded as described above, so that it will not break.

On the other hand, the tip of the protrusion 20 is also pressed against the side surface of the groove 2,
The protrusion 20 is entirely curved and prevents the water stop member 12 of the present invention from falling out of the groove 2 due to the repulsion elastic force.

The adhesive filling portion 22 is filled with an epoxy putty-like adhesive 25, but this adhesive 25 has a wider adhesive area to the groove 2 than in the conventional example, and also has a protrusion as described above. 21, so even if some kind of impact is applied from the outside, this adhesive 25
can be prevented from peeling off. The protrusions 23 serve as a guide when filling the adhesive 25, and their presence improves workability, eliminates wasted materials, and provides a nice finished appearance.

When the water stop member 12 of the present invention is set in the joint groove 2 in this way, water leaking from the concrete pouring joint 3 is collected in the gutter 14 and guided to the drainage groove 5, but water swelling The sealing material 18 reacts with the infiltrating water and expands approximately twice or more, and comes into close contact with the side surfaces of the groove 2, thereby ensuring water stoppage during this period.
Note that since the movement caused by the swelling of the sealing material 18 is blocked by the space formed by the groove 19, there is no risk that the adhesive 25 will separate from the concrete surface and the water stop member 12.

This is the first water stop, and the second water stop is performed using the adhesive 25 as a caulking material.
5 also serves to increase the strength of the water stop member 12.

As mentioned above, the water-stopping member for tunnel joints of the present invention uses a water-swellable sealant to provide reliable waterstopping due to its water-swelling effect, and the water-stopping member itself is robust and durable. Moreover, the adhesive used as a caulking material is also less likely to peel off.

[Brief explanation of drawings]

FIG. 1 is a longitudinal front view showing an example of a tunnel, FIG. 2 is a longitudinal front view showing a conventional water stop member, and FIG. 3 is a longitudinal front view showing an embodiment of the water stop member of the present invention.
FIG. 4 is a longitudinal sectional front view showing the state of use of the same. 1...Tunnel, 2...Joint groove, 3...Joint, 5...Drainage ditch, 6a, 6a'...Fin, 7...
Gutter part, 8... Foot part, 9... Water stop member, 10... Sponge, 11... Caulking material, 12... Water stop member, 13, 13'... Side wall, 14... Gutter part, 15
... Thick plate body, 16 ... Plane, 17 ... Groove, 18 ...
... Water-swellable sealing material, 19 ... Notch groove, 19
a... Deepest part, 20, 21, 23... Projection, 21
a...Bulging part, 22...Adhesive filling part, 24...
...Through hole, 25...Putty-like adhesive.

Claims (1)

[Scope of utility model registration request] In a water stop member that is shaped like a gutter and press-fit into the joint with a roughly U-shaped cross section, a groove is provided in the longitudinal direction on the outer surface of the side wall of the gutter portion to house the water-swellable sealing material, and a cutout groove is provided in the lower stage of the groove. A pressure welding protrusion is integrally protruded from the base plate, and a protrusion for preventing peeling is integrally formed and protruded from the adhesive-filled area formed by the protrusion and the side surface of the thick plate that constitutes the bottom plate of the gutter. Features: Water-stopping material for tunnel joints.