JPH0988352A - Water leak stopping method and device for concrete structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stop the water simply and quickly where the water leaks at the surface of a building frame by eliminating any grooving operation. SOLUTION: To stop water leak at a concrete structure 1, the leaking part is cut in U-shape and sealed with an instantly hardening sealing material, and from above dimples 3 in the countersunk form are bored at a certain spacing, into which internally threaded anchors 4 are driven, followed by blocking the dimples 3 with holder member 6, and a nut-equipped hollow bolt 5 is screwed into each anchor 4 so that fixation is established. A vessel 10 equipped with a threaded portion 13 in the center accommodates a necessary amount of water stop resin and water and fixed to the hollow bolt 5, and the water stop resin is passed through the hollow in the bolt 5 with the reaction pressure of the resin and water and allowed to permeate the crazing part of the structure, and thus the water stop is achieved. Foaming of the resin and permeation can be made still more effective by supplying water to a high water-absorptive polymer and putting the threaded part 13 in eccentricity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for stopping water leakage that occurs in a concrete structure due to cracks, etc. And a water-stopping method that can be achieved quickly and a water-stopping device used therefor.

[0002]

2. Description of the Related Art Leakage from a concrete structure occurs in almost all cases, and various waterproofing methods have been proposed so far. One of the water-stopping methods is to make cracks and concrete splicing parts in a width of 50 mm and a depth of 50 mm when making a pocket for filling the resin of the water-stopping material on the leak side. A mesh hose is installed and the surface is cured with gum tape and then embedded with quick-setting cement mortar to form a resin pocket. At this time, an injection pipe and an air bleeding pipe are attached and placed on both ends of the mesh hose that are separated by 1.5 m intervals, and then a water blocking resin is injected into the same resin pocket to block both pipes and then foamed and hardened. The water is stopped by letting it run.

In this construction method, since the skeleton concrete is greatly crushed with a considerable width and depth as described above, the skeleton is damaged, and vibration, noise and industrial waste are generated. In addition, since the seal made with quick-setting cement mortar will harden immediately, even a skilled worker can throw away half of the quick-setting cement mortar, or bubbles will form in the seal, and the resin will leak from the bubbles to the outside when the resin foams, resulting in a water-stopping effect. Was sometimes reduced.

[0004]

DISCLOSURE OF THE INVENTION The present invention eliminates the scavenging work at the time of water stoppage work and the use of quick-setting cement mortar, thereby eliminating the damage to the concrete skeleton, and vibration and noise during the work. The present invention intends to provide a water-stopping method for a concrete structure and a water-stopping device used for the same, which can significantly reduce the generation of water and industrial waste, and also make the work contents simple and can stop water quickly and surely even if it is not a skilled worker. It is a thing.

[0005]

According to the present invention, in order to stop the leakage of water from a concrete structure, the leaked portion is U-cut and sealed with an immediate hardening type sealing material, and at a predetermined interval from the top of the seal. After punching a dish-shaped recess, drive the inner screw anchor into the recess, close the recess with a pressing member, screw one end of the hollow bolt with nut into the inner screw anchor, and then fix it to the required amount. A container provided with a water material resin and water and having a threaded portion at the center is attached to the other end of the hollow bolt with nut, and the water blocking material resin is hollowed with the nut by the reaction pressure between the water blocking resin and water. It is a construction method for stopping water leakage of a concrete structure quickly and surely by making it penetrate into a cracked portion of the concrete structure through the hole of the concrete structure, and a water stopping apparatus used for the construction method. In addition, the screw part of the container is eccentric from the center, and the screw part of the container is set downward, and the water is absorbed by the superabsorbent polymer and put in each container. It is each water stopping device used for the construction method and each water stopping method.

[0006]

1 is a cross-sectional view showing a state in which a water stop device is mounted on a concrete skeleton in a water stop operation according to the first aspect of the present invention. However, the waterstop material resin and water originally contained in the container are not shown. The water leaks such as cracks and splices appearing on the surface of the concrete structure 1 are U-cut (cross-section V) for cleaning.
After including the cutting of the mold), the seal 2 is applied with the immediate hardening type sealing material. The illustrated depression 3 is formed by punching a hole in the shape of a dish from above the seal 2, and then a commercially available inner screw anchor 4 is driven and placed in the hole. Next, the depression 3 is closed with a pressing member 6 made of silicone rubber,
Insert one end of the hollow bolt 5 with nut into the through hole 7 in the center of the pressing member 6 and screw it into the inner screw anchor 4.
Firmly fix the resin so that it will not leak during foaming. At this time, if the seat plate 8 is bitten, the pressing member 6 does not warp, so that the depression 3 is more reliably closed. The holding member 6 is made of silicone rubber. However, the holding member 6 is used because foamed water-stopping material resin is hardly adhered to the holding member 6 and is not limited at all as long as it has the same performance. In addition, the pressing member 6 is provided with a bulging portion 9 which is inserted into the recess 3 with a slight gap so that the foamed resin is retracted from the surface of the body to be hardened to facilitate the finishing work after the construction is completed. ing. The container 10 includes a body portion 11 and a lid 12. The body portion 11 is formed into a hollow body so that the foamed resin can be easily taken out, and the lid 12
Has a threaded portion 13 at the center, which is screwed into the hollow bolt with nut 5. After the operation of fixing the pressing member 6, the container 10 containing the required amount of the waterproofing material resin and water adapted to the thickness of the skeleton is screwed into the other end of the hollow bolt 5 with nuts and fixed. Used alone or with superabsorbent polymer. From this state, in the container 10, the water blocking resin reacts with water to start foaming, so that the foaming pressure causes the water blocking resin to pass through the hole 14 of the hollow bolt 5 with a nut and the inner screw anchor 4 and the inside. It is extruded into the recess 3 through the slit of the screw anchor 4 and the gap between the outer peripheral surface of the inner screw anchor 4 and the skeleton to fill up, and then the cracks and dents 3 inside the skeleton that are connected to the cracks on the sealed surface. It is a groove that penetrates into cracks that do not appear on the surface for a while, and cures the resin to completely stop the entire body. The O-rings 15 and 15 'are interposed in order to prevent the foamed water-stopping material resin from leaching into the screw portion and hardening, thereby firmly fixing the screwed members together. After the water stop is completed, first, the container 10 is removed from the nut-attached hollow bolt 5, then the nut-attached hollow bolt 5 is removed, the seat plate 8 and the pressing member 6 are removed, and the removed portion is smoothed with polymer cement mortar 16 or the like. Finish and complete the construction. In the present embodiment, the hollow bolt 5 has been described by fixing the nut to the intermediate portion. However, the hollow bolt 5 is screwed into the inner screw anchor 4 and the pressing member 6 is tightened and fixed by the nut, and the container 10 is fixed. Since the nut can be attached, the nut can be detached as a separate body without any problem.

FIG. 2 is a cross-sectional view showing a state in which a water stop device using a container in which a screw portion according to the second aspect of the present invention is eccentric from the center is attached to a concrete skeleton. It is the same as that of the first invention except that is different. That is, the container 17 is composed of a body portion 11 and a lid 18, and the lid 18 is provided with a screw portion 13 which is eccentric from the center and is screwed into the hollow bolt with nut 5. As shown in the figure, when the container 17 is set in the hollow bolt 5 with nut with the screw portion 13 facing downward, the water-stopping material resin in the container 17 reacts with water to start foaming, and the water-stopping material is caused by the foaming pressure. The resin passes through the hole 14 of the hollow bolt 5 with a nut and passes through the inner screw anchor 4 and the slit of the inner screw anchor 4 and the gap between the outer peripheral surface of the inner screw anchor 4 and the skeleton to form the recess 3
The phenomenon of being extruded into the inside of the container and being filled is the same as that of the first invention, but since the screw portion 13 is at the bottom, the waterproofing material resin does not remain in the container, and It can enter the recess 3 more smoothly than an object. In addition, when the container 17 containing the water blocking resin is set in the hollow bolt 5, only water flows to the body side, so that the water required for foaming does not become insufficient, so that the high water absorbing polymer is used. An appropriate amount is placed in a container, and water is supplied to this to ensure that sufficient water is retained to complete the foaming.

[0008]

EXAMPLES Next, specific examples of the present invention will be described along with work procedures. (1) The surface of the concrete structure 1 such as a crack in which water is leaking is 3 mm wide with a cordless surf liner,
After V-cutting to a depth of 3 mm, "Eposoft" (trade name: room temperature curing one-pack type modified epoxy adhesive sealing material manufactured by Yokohama Rubber Co., Ltd.) is press-fitted with gas to form a seal 2.
(Fig. 3) (2) After the seal has hardened, the water leakage part is pierced to a depth of 50 mm with an electric drill with a blade diameter of 6.5 mm at intervals of 3 places per 1 m, and then piercing in consideration of the directionality of cracks. From above, a hole is drilled in a plate-like shape with a drill blade having a diameter of 10 mm to a depth of about 10 mm to form the depression 3. (Fig. 4) (3) After removing and cleaning concrete chips in the hole, an ordinary commercially available inner screw anchor 4 with a diameter of 6 mm and a length of 40 mm is driven into the hole and fixed in place. The recess 3 is closed by the member 6 and the seat plate 8 and the hollow bolt 5 with a nut is tightened to prevent the foamed resin from leaking. (Fig. 5) (4) Inject water from the bolt 5 to dampen the water. (5) In the embodiment of the first invention, "NL paste" (trade name: water-crosslinkable polyurethane prepolymer manufactured by Takeda Pharmaceutical Co., Ltd.) 70c is provided on the body portion 11 of the container 10.
c and water 5 cc, put the O-ring 15 between them, and put the lid 12 on the bolt 5.
The container 10 is fixed by screwing while sandwiching. On this occasion,
When "Aqua Keep" (trade name: super absorbent polymer manufactured by Sumitomo Seika Chemicals Co., Ltd.) is put in the container 10 together with water, the water does not stop downward even when the container 10 is screwed and rotated. Since it is dispersed and held as a whole, the "NL paste" can be efficiently foamed. (FIG. 6) The embodiment according to the second invention is almost the same as that according to the first invention and is not particularly shown, but since the screw portion 13 of the lid 18 is set downward as shown in FIG. The "NL paste" can be easily foamed and can easily get into the depressions 3, and when "Aquakeep" is used, only the water can be dispersed and held in the entire container without flowing into the body side by the action, and the "NL paste" is retained. The foaming rate of the "paste" can be increased. (6) After completing the foaming of the “NL paste”, the container 10, the bolt 5, the seat plate 8 and the pressing member 6 are removed. (7) The portion from which the bolt 5 has been removed is coated evenly on the surface with polymer cement mortar 16 or the like to finish. (FIG. 7) (8) For reuse of the containers 10 and 17, the foamed resin remaining therein is removed from the body 11 by removing the covers 12 and 18. In the above example, "Eposoft" (trade name: room temperature curing one-pack type modified epoxy-based adhesive sealing material manufactured by Yokohama Rubber Co., Ltd.) was used as a sealing material, and "NL paste" was used as a water-stopping material resin. (Trade name: Takeda Pharmaceutical Co., Ltd.)
The water-crosslinkable polyurethane prepolymer manufactured by Sumitomo Chemical Co., Ltd. and "Aquakeep" (trade name: superabsorbent polymer manufactured by Sumitomo Seika Chemical Industries, Ltd.) were used as the superabsorbent polymer. Not limited to materials, water-stopping resins and superabsorbent polymers, other quick-drying urethane sealing materials, water-stopping resins that react with water, superabsorbent polymers, etc. can be used Is.

[0009]

EFFECTS OF THE INVENTION In order to stop water leakage of a concrete structure, the present invention basically cuts the water leakage portion and seals it with a quick-curing sealing material, and then a plate at a predetermined interval from the top of the seal. After drilling a fissure-shaped recess, drive an internal screw anchor into the recess, close the recess with a pressing member, and screw one end of a hollow bolt with a nut into the internal screw anchor to fix it, and then stop the required amount of water. A container equipped with a threaded portion at the center containing a material resin and water is attached to the other end of the hollow bolt with nut, and the water-resistant material resin is reacted with the water by the reaction pressure of the water-resistant material resin and the hollow bolt with nut. By permeating into the cracked part of the concrete structure through the holes of the concrete structure, the water leakage of the concrete structure can be stopped quickly and surely.Therefore, the concrete structure will not be damaged and the structure concrete will be damaged. No, generation of noise can be prevented, and can reduce the occurrence of industrial waste according 斫Ri debris. Also,
Since the work is simple, no skilled worker is required, and since the water stop device can be reused except for the commonly used inner screw anchor bolts, the construction work can be performed at an extremely low cost. Then, with the screw part of the container eccentric from the center and set with the screw part of the container facing down,
By allowing water to be absorbed into the water-absorbent polymer and put into each container, the effect of further increasing the rate of foaming of the water-stopping material resin and permeation into the recess can be achieved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a water blocking device using a container having a screw portion in the center is set.

FIG. 2 is a cross-sectional view showing a state in which a water blocking device using a container having a screw portion eccentric from the center is set.

[Fig. 3] Fig. 3 is a seal state diagram showing a work process of a water stop method according to the present invention.

[Figure 4] Hollow hole drawing

[Fig. 5] Mounting diagram of inner screw anchor, hollow bolt with nut, and pressing member

FIG. 6 is a view of mounting a container on a hollow bolt with a nut.

[Figure 7] Finishing diagram after water stoppage

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete structure 2 Seal 3 Recess 4 Inner screw anchor 5 Hollow bolt with nut 6 Holding member 10 Water blocking material Container containing resin and water 11 Body of container 10 Lid of container 10 13 Screw part 14 Hollow bolt 5 Hole 15,15 'O-ring 16 Polymer cement mortar 17 Water blocking material Container containing resin and water 18 Lid of container 17

Claims (6)

[Claims] 1. A water leaking portion of a concrete structure is U-cut and sealed with a quick-curing sealing material, and plate-like depressions are punched at predetermined intervals from the top of the seal, and then internal screw anchors are inserted in the depressions. The inner wall of the hollow bolt with a nut by screwing in the hollow with a pressing member to fix it, and then fixing the container with a threaded portion in the center containing the required amount of water blocking resin and water. It is attached to the other end of the hollow bolt with a water stopper, and the water blocking resin penetrates into the cracked part of the concrete structure through the hole of the hollow bolt with a nut by the reaction pressure between the resin and water. Water method. 2. A water leaking portion of a concrete structure is U-cut and sealed with a quick-curing sealing material, and dish-shaped recesses are punched at predetermined intervals from the top of the seal, and then internal screw anchors are inserted in the recesses. The inner wall of the hollow bolt with nuts is fixed by screwing one end of the hollow bolt with a pressing member, and then a screw portion containing a required amount of the waterproof resin and water is eccentric from the center. The container is attached to the other end of the nut-equipped hollow bolt with the threaded portion downward, and the water-resisting material resin is cracked through the hole of the nut-equipped hollow bolt by the reaction pressure between the water-resisting material resin and water. Leakage and water stop method for concrete structures that penetrates into parts. 3. The method for waterproofing and stopping water leakage of a concrete structure according to claim 1 or 2, wherein the superabsorbent polymer absorbs the water and the water is put into a container. 4. An inner screw anchor driven into a hollow formed in a concrete structure, a holding member for closing the hollow, a hollow bolt with a nut for screwing the holding member into the inner screw anchor to fix the water blocking resin and water. The water stop device used for the water stop method according to claim 1, wherein the water stop device is configured by a container having a threaded portion at a center thereof, which is inserted and attached to the nut-attached hollow bolt. 5. An internal screw anchor for driving into a hollowed hole in a concrete structure, a pressing member for closing the hollow, a hollow bolt with a nut for screwing and fixing the pressing member into the internal screw anchor, and a waterproof resin and water. The water shut-off device used in the water shut-off method according to claim 2, wherein the screw part to be inserted and attached to the hollow bolt with nut is constituted by a container having an eccentricity from the center. 6. A water stopping device used in a water stopping method according to claim 4, wherein the water is absorbed by a super absorbent polymer and put into a container.