JP2530569B2 - Water stop method in joint - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of stopping water at joints of a bridge structure.

[0002]

2. Description of the Related Art A bridge structure is designed so as to absorb the deformation of the bridge structure by providing joints against changes in temperature and load, and to maintain the stability of the structure. As a method of treating joints of bridge structures, water proofing has also been performed by installing a non-drainage expansion joint device in the joints. However, this type of expansion joint device usually has 1.
Several rubber seals with a length of about 8 m are installed continuously in the width direction of the bridge. As a result, a seam is formed, and that part becomes a weak point, and many water leaks to the basement.

When water leakage occurs, a problem is the corrosion of the bearing. If the bearing loses its function due to corrosion, it may adversely affect the girder structure and cause serious damage. Also, in urban viaducts, water leakage from joints pollutes the surface of the pier, which is unfavorable in terms of appearance. Therefore, if the joints can be completely waterproofed, it is effective not only for the durability of the bridge but also for the landscape.

The above-described method of installing a non-drainage type expansion joint device at a joint is a typical method for treating the joint, and when this is concretely shown in FIG.
Several expansion joint devices 13 are continuously installed in the notch 15 at the end of the bridge 11 facing each other with the anchor 14 in between in the bridge width direction via the anchor 14.

In this case, the expansion joint device has both the effect of following expansion and contraction of the bridge and the water stop effect, but a plurality of expansion joint devices 13 continuously installed in the width direction of the bridge and water leakage from the joint of the expansion joint device 13 Are often seen. In the case of small and medium bridges, the joint width may be as narrow as approximately 5 cm,
As a countermeasure against this, almost no treatment is performed, and rarely, the sealing material 16 is filled near the uppermost portion of the joint.

If there is a ground cover or a median strip,
As shown in FIGS. 8 and 9, a waterproof measure is taken by filling the joint portion with the sealing material 17. However, this method does not have continuity with the expansion joint device 13, and when a seam occurs, that portion becomes a weak point in the waterproof structure, and water leakage often occurs.

Therefore, various measures have been taken to improve the waterproofness of the expansion joint device as a countermeasure against these problems. However, the expansion joint device is a member for directly supporting a wheel load, and is used under severe conditions. Because of this, there is a limit to strengthening waterproofness.

[0008]

Therefore, according to the present invention,
The problem of water leakage from the expansion joint device to the joint of the bridge structure is addressed and solved within the joint.

[0009]

According to the present invention, the above-mentioned problem is solved from the joint width by sticking a release film having both side surfaces as adhesive surfaces, an adhesive material on the adhesive surfaces and a string-shaped body attached at one end. A wire that is inserted in the width direction of the bridge of the waterproof material at a predetermined position in the joint between the opposite ends of the bridge in a compressed state. After removing the release film by pulling the string-shaped body by pulling the string-shaped body, the compressed state is released, the inside of the water-stopping material is filled with air, and the adhesive surface is expanded to the bridge end surface by the expansion pressure. The problem is solved by means of pressure contact and adhesive fixing.

[0010]

[Function] The rubber waterproof material having a substantially oval cross-section in a compressed state, which is located at a predetermined position in the joint between the opposite ends of the bridge, is wider than the joint width before the compression. The state is restored by releasing the state, and the adhesive surface is pressure-bonded to the end surface of the bridge body through the adhesive material and adheres to the bridge body to be fixed in the joint.

Further, when the water blocking material is filled with air, an expansion pressure is generated and the fixation to the end face of the bridge is further strengthened.

Further, since a release film having a string-like body attached to the end is attached to the adhesive surface of the water blocking material, when the water blocking material is positioned in the joint of the end surface of the opposing bridge, the adhesive surface It is possible to prevent the adhesive from contacting the end face in the middle and being damaged.
The release film is removed by pulling the string-like body immediately before releasing the compressed state.

[0013]

EXAMPLE An example of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view showing an embodiment of the present invention, FIG. 2 is a perspective view showing an embodiment of a water blocking material before a release film is attached to an adhesion surface to the bridge end surface, and FIG. 3 is a bridge end surface. FIG. 4 is a perspective view showing an embodiment of a water blocking material in which a release film is adhered to the adhesive surface to the substrate, FIG. 4 is a perspective view of an example of removing the release film from the water blocking material, and FIGS. It is an example of the procedure of installing a waterproofing material in, and is a bridge width direction schematic diagram which abbreviate | omitted one of the opposing bridge bodies. In the drawings, 1 is a waterproof material, 2 is a wire, 3 is an adhesive material, 4 is a release film, and 5 is a string-like body.

As shown in FIGS. 2 and 3, the water blocking member 1 is made of an elastic material such as rubber and has a substantially oval cross-section tubular shape that is slightly wider than the joint width and extends in the bridge width direction. A wire 2 is inserted in the width direction, both ends are closed surfaces 1a, both side surfaces are bonded surfaces 1b to the bridge end surface, and an adhesive material 3 is provided on the bonded surface 1b. The attached release film is attached. Reference numeral 1c is an air inlet / outlet hole.

In this embodiment, the pressure-resistant hose made of natural rubber was used as the water blocking material 1 and butyl rubber was used as the adhesive material, but it goes without saying that the material is not limited to this.
Although various materials can be used for the wire 2, a rust preventive material is advantageous from the viewpoint of durability, and the wire 2 may be tensioned in order to hold the water blocking material 1 in a straight line. PC steel wire is advantageous. In this example, stainless PC stranded wire was used.

As shown in FIGS. 1, 5 and 6, the water blocking material 1 thus formed is installed in the joints 12 between the ends of the opposing bridge bodies 11. Reference numeral 13 denotes an expansion joint device installed in the cutout portion 15 at the end of the bridge body 11 via the anchor 14. First, as shown in FIG. 5, the joint 12 between the ends of the bridge body 11 facing the water blocking material 1 through which the wire 2 is inserted.
Water-stopping material 1 after temporary placement at the bottom of the girder along the bridge width direction
To the compressed state. Of course, the water blocking material 1 may be compressed in advance. In this embodiment, the water blocking material 1 is compressed by decompressing the inside of the water blocking material 1 using a vacuum pump through the air inflow / outflow hole 1c provided in the water blocking material 1. After depressurization, the air inflow / outflow hole 1c is closed. .

Then, as shown in FIG. 6, the wire 2 is used to hang it up and position it at a predetermined position. The support material 20 is used together if necessary. When the water blocking material 1 is located at a predetermined position, the string attached to the end of the release film 4 is pulled toward the other end as shown in FIG. After that, the air inlet / outlet hole 1c of the water blocking material 1 is opened, the decompression inside the water blocking material 1 is released, the compressed state of the water blocking material 1 is released, and the inside of the water blocking material 1 is inserted from the air inlet / outlet hole 1c. Fill with compressed air.

When the compressed state is released, the water blocking material 1 is restored to its original state, and the expansion pressure of the filled air causes the adhesive surface 1b to adhere to the end surfaces of the bridge body 11 which face each other across the joint 12 as shown in FIG. Are pressed and bonded and fixed. After adhering and fixing the adhering surface 1b to the end face of the bridge body, the pressure is returned to the atmosphere.

In this way, a water-stop structure is formed in the joint 12 between the ends of the opposite bridges 11, and water leakage from the joints of the expansion joint device 13 installed above the joint 12 is prevented in the joint 12. Stop water.

The wire 2 inserted through the water blocking material 1.
May be left in the water blocking material 1 or may be removed. If both ends of the wire 2 are fixed and left on the sides of the bridge, etc., the waterproofing material 1 can be fixed more durable.

[0021]

As described above, the present invention has the following effects. The water blocking material of the cylindrical elastic body in a compressed state located at a predetermined position in the joint between the opposite ends of the bridge body,
Before compression, it is wider than the joint width, and due to the restoring force by releasing the compressed state and the expanding pressure by filling with air, the adhesive surface is pressure-bonded to the end face of the bridge body through the adhesive and is bonded. Since it is fixed in the ground, it is possible to stop water leakage from the joint or the like of the expansion joint device installed above in the joint.

In addition, since the water blocking material is compressed and a wire is inserted and drawn into the joint between the opposite bridges, the water blocking material can be easily positioned even in a narrow joint, and further, Since the water blocking material is drawn into the joint in a compressed state, it is possible to reduce the contact of the adhesive surface of the water blocking material with the end surface of the bridge during the drawing.

Further, since the release film having the string-shaped body attached to the end is adhered from above the adhesive on the adhesive surface of the water blocking material, the water blocking material is positioned in the joint of the end surface of the opposite bridge body. Even when the adhesive surface comes into contact with the end face of the bridge halfway during pulling in, damage to the adhesive material can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an embodiment of a water blocking material before a release film is attached to an adhesive surface.

FIG. 3 is a perspective view showing an example of a water blocking material in which a release film is attached to an adhesive surface.

FIG. 4 is a perspective view showing an example of removing a release film from a water blocking material.

FIG. 5 is a schematic view of the width direction of the bridge showing an embodiment of the procedure for installing the waterproofing material in the joint portion, in which one of the opposing bridge bodies is omitted.

[Fig. 6] Fig. 6 is a bridge width direction schematic view showing an embodiment of the next procedure for installing a water blocking material in a joint portion, in which one of the opposing bridge bodies is omitted.

FIG. 7 is a cross-sectional view showing a conventional method of stopping water at joints.

FIG. 8 is a cross-sectional view showing a conventional water blocking method for the ground covering portion.

FIG. 9 is a cross-sectional view showing a conventional method of stopping water in a median strip.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water stop material 1a Closure surface 1b Adhesive surface 1c Air inlet / outlet hole 2 Wire 3 Adhesive material 4 Release film 5 String body 11 Bridge body 12 Joint 13 Expansion joint device 14 Anchor 15 Notch 16 Sealing material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Yokoyama 3-4-18 Kusakamachi, Higashi-Osaka City, Osaka Prefecture (56) References , B2) Actual Kohei 1-311607 (JP, Y2)

Claims (1)

(57) [Claims] 1. At a predetermined position in a joint between opposing ends of a bridge body, both side surfaces are used as adhesive surfaces to the opposing bridge body end surfaces, an adhesive material is provided on the adhesive surfaces, and a string-like body is attached to one end. The water blocking material of the elastic body having a substantially oval cross section wider than the joint width to which the release film is attached is compressed, and the wire is pulled in with the wire inserted in the width direction of the bridge. Then, after removing the peeling film by pulling the string-like body, the compressed state is released, the inside of the water blocking material is filled with air, and the bonding surface is pressure-bonded to the end surface of the bridge body by expansion pressure to bond and fix it. A method of stopping water in a joint, which is characterized by stopping water by doing so.