JPH0435561B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is applicable to fire prevention water tanks for buildings, irrigation canals,
Or, cracks that occur on the inner surface below the water surface of parts of water equipment where water is constantly stored or supplied, or water leaks that are formed as gaps due to ground movement or aging, without draining the water. Concerning an uninterruptible water stop construction method that seals water to stop water.

(Prior art) In the past, cracks or seams that occurred on the inner surfaces of parts of buildings that were constantly supplied with water, such as fire tanks, irrigation canals, or other water facilities, were caused by changes in the ground or aging. When sealing a water leak that has formed as a gap, the following water stop repair method was used.

That is, this construction method completely removes water from the fire prevention water tank, irrigation canal, or other water equipment, etc., which are constantly supplied with water, to empty the interior thereof.

Therefore, the cracks that occur inside the building or the gaps between the joints are filled with an appropriate filler and cured, and then filled with water again to stop the water from leaking throughout the building.

(Problems to be Solved by the Invention) However, at present, such construction methods have various problems as shown below.

First, in the case of waterways such as irrigation canals, or the dam facilities that are the source of such waterways, these types of waterways cover a very wide range even if they are under the jurisdiction of the Ministry of Construction, the Water Resources Development Corporation, and the Agricultural Administration Bureau. The amount of water leaking there is enormous, so
In terms of water resource protection and safety measures, water leakage prevention and water shutoff construction are important maintenance tasks.

However, as mentioned above, when water in such waterways is to be left empty, that is, the water has been drained, first a water cutoff notice is issued to water users, and then the water gates are closed. After the water has been reduced, the remaining water must be pumped out using a pump, etc. Then, as mentioned above, cracks that have occurred inside the concrete parts that form this waterway, etc., or gaps between concrete pouring joints, are filled with an appropriate filler and hardened to complete the water-stop repair. After that, the water is turned on again and the entire water stop repair process is completed without confirming that the water has stopped.

Therefore, this series of processes requires a long time and is very large-scale, and in reality, considering the situation of water users, only a short work time of 10 to 12 hours can be secured. Often,
There was a problem in that it was impossible to perform sufficient work within this time limit.

In addition to time constraints, the weather is also a very important constraint. For example, in view of the stability of the weather and the water usage of users, construction may be carried out during the winter drought period when water usage is at its lowest. In many cases, this may lead to the occurrence of force majeure factors such as deterioration of working conditions, adverse effects on the cured adhesive of the sealant, or inability to confirm water stoppage after water flow due to low air and water temperatures, resulting in complete failure. Water stoppage repairs could not be expected, and it was also difficult to carry out repairs frequently.

On the other hand, in the case of water stop repair to fire prevention water tanks attached to buildings such as factories under the jurisdiction of the Fire and Disaster Management Agency, if the fire prevention water tank is to be completely drained, the Fire Service Act requires that a replacement fire prevention water tank be installed. There is a regulation that says it cannot be done until later. Therefore, it would be very expensive to carry out this process, so we try to perform water shutoff repairs by constantly injecting water to maintain the water level. It is almost impossible to do so. As a result, there are currently many aquariums that are left unattended even if they are leaking.

In addition, for example, in the case of a pulp mill that uses a large amount of water, it is not possible to stop the supply of water for operation, so it is necessary to perform water shutoff repairs without draining water, as in the case of the fire prevention water tank mentioned above. However, it was impossible to stop the water at all using the water stop repair method described above.

Therefore, in view of the above-mentioned problems, the present invention aims to solve the problem of cracks or seams that occur on the inner surface below the water surface of parts such as fire prevention water tanks of buildings, irrigation canals, or other water facilities where water is constantly stored and supplied. It was created with the goal of making it possible to repair water leaks by sealing them without draining water.

(Means for Solving the Problems) This invention provides fire protection water tanks for buildings, irrigation canals,
Or, on the inner surface below the water surface of a part such as water equipment where water is constantly stored and supplied, cracks that occur on this inner surface or gaps between joints are used to cure epoxy resin and amine while water is stored and supplied. A resin adhesive that can be applied and cured even in water and whose main component is a resin adhesive is applied or filled to seal the gap, and the amine group replaces the water molecules, replacing the film of water molecules inside the gap. The above-mentioned problems are solved by expelling the water content and curing the material to stop water.

(Function) The uninterrupted water stop construction method according to the present invention prevents cracks occurring on the inner surface of a fire prevention water tank, irrigation canal, or other water facility under the water surface of a part where water is constantly stored and supplied. Alternatively, while water is stored and supplied to the gap between the joints, a resin adhesive containing an epoxy resin and an amine curing agent as main components and which can be applied and cured even in water is applied or filled. By doing so, the seal is sealed, and after that, when the resin adhesive hardens, the cracks or gaps in the seam are completely water-tight.

At that time, the resin adhesive, which is mainly composed of an epoxy resin and an amine curing agent and can be applied and cured even in water, is inserted into the gap by replacing the water molecules with the amine groups and replacing the film of water molecules. It has the effect of hardening by expelling moisture.

As a result, even if moisture exists inside the gap, it is expelled and the gap becomes completely water-tight.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

That is, the reference numeral 1 shown in the figure is an irrigation canal, and the concrete structure 1a of this irrigation canal 1 is
The uninterrupted water shutoff method according to the present invention will be explained with reference to the process of shutting off the water to the crack 3 that occurred in the above.

First, an underwater worker 5 dives into the water 4 flowing in the irrigation canal 1 while it continues to flow, and as shown in FIG. 1, water adheres to the surface of the concrete structure 1a of the irrigation canal 1. (In this case, especially in the case of an aquarium, the deposits 2 such as sludge or sediment are removed separately.) Next, as shown in FIG. The surface around the crack 3 is sanded using a portable polishing device 6. Furthermore, as shown in FIG. 3, the entrance of the crack 3 is V-cut using the portable polishing device 6 to facilitate the subsequent process of applying or filling the resin adhesive 7. .

Next, as shown in Fig. 4, the crack 3 pretreated in this way is coated with or filled with resin putty 7, which can be applied and cured even in water, while it is still in water. Teso crack 3
The resin adhesive 7 is then cured to complete the water stop process, as shown in FIG.

The resin adhesive 7 used here, which can be applied and cured even in water, is Aquatapoxy (American
(manufactured by Chemical Corp.), and this aquapoxy is mainly composed of epoxy resin and amine curing agent.These two materials are synthesized using a special method to bring out the surface tension of the polymer and to absorb water. In addition, the interfacial tension with respect to the material to be coated, such as iron or concrete, is greater than the interfacial tension of water with the material to be coated, and a thin film of water molecules is formed on the surface of the material to be coated. However, the film of water molecules is replaced by the amine group, which acts to expel the water existing inside the crack 3, and makes it possible to apply the coating with a strong suction adhesive force. Even when the coating material is submerged in water, it can be applied directly to the material to be coated and cured. Furthermore, after curing, it retains 25% elasticity and is designed to be able to handle cracks and joint movement. It is something.

Since this water shutoff process can be carried out underwater, there is no need to shut off the water in the irrigation canal 1 every time, and there is no need to make extensive preparations in advance. It is something that can be done.

On the other hand, although not shown in the drawings, this water stopping process can be used to prevent cracks or seams that occur on the inner surface of water in areas that are constantly supplied with water, such as other waterways, fire prevention water tanks in buildings, or other water equipment. The resin adhesive 7 is also ideal for sealing the cracks and sealing off water, and the process is almost the same as the above-mentioned example, and the resin adhesive 7 is applied to the cracks or the gaps between the joints. Alternatively, water can be stopped by filling and curing.

This makes it possible to easily repair water leaks in fire prevention water tanks without having to install a backup water tank as a replacement, or to use water without draining water from other water equipment. Water leaks can be easily repaired in the same state, and the cost of water stoppage repairs can be significantly reduced.

Incidentally, in the above embodiment, steps such as removing the deposit 2, sanding, V-cutting, etc. were explained, but these steps facilitate the application or filling of the resin adhesive 7. It goes without saying that the pretreatment step is not limited to this, and any suitable pretreatment step may be used as the pretreatment step. Furthermore, it goes without saying that the other steps are not limited to the embodiments described above.

(Effects of the Invention) The present invention configured as described above is capable of suppressing cracks that occur on the inner surface below the water surface of parts such as fire prevention water tanks of buildings, irrigation canals, or other water facilities where water is constantly stored and supplied. , or with water stored and supplied to the gap between the joints,
A resin adhesive that is mainly composed of an epoxy resin and an amine curing agent and can be applied and hardened even in water is applied or filled to seal the area, and the amine group replaces the water molecule by replacing it with a film of water molecules. By expelling the moisture inside the gap and curing it to stop the water, it is possible to easily repair a water leak while the water is still in use without draining the water.

Therefore, even in the case of waterways such as irrigation canals, or dam facilities that are the source of them,
You can easily carry out water shutoff repair work while the water is still being used without draining the water and emptying it. This allows you to notify water users of water outages, close flood gates, etc.
It is possible to repair internal cracks or gaps between concrete pouring joints in a short period of time without the need for very large-scale work such as draining residual water using pumps, etc. be.

Therefore, there are no restrictions due to weather,
Water stoppage repair work can be performed at any time, and it is not possible to confirm water stoppage after water flow due to deterioration of working conditions, adverse effect on curing of sealant, or low air and water temperature. Such force majeure factors will not occur at all, and a complete water-stop repair can be easily performed.

Furthermore, even in the case of water stop repair of fire prevention water tanks attached to buildings such as factories under the jurisdiction of the Fire and Disaster Management Agency, there is no need to drain water from these fire prevention water tanks, so there is no need to install a replacement fire prevention water tank. Therefore, it is possible to significantly reduce the cost of water stop repair work. This effect is remarkable even in pulp mills and the like that use large amounts of water, making it possible to reduce the cost of water stoppage work to an extent that was previously unimaginable.

Then, a resin adhesive that can be applied and cured even in water, which is mainly composed of an epoxy resin and an amine curing agent, is applied or filled to seal the area, and the amine group replaces water molecules, forming a film of water molecules. Since the parts are exchanged to drive out the moisture inside the gap and harden it, the water inside the gap disappears and the adhesive becomes strong, making it possible to securely seal the gap.

As described above, according to the present invention, it is possible to remove cracks or gaps between joints that occur on the inner surfaces of parts of buildings such as fire prevention water tanks, irrigation canals, or other water equipment that are constantly supplied with water. It is possible to perform water shutoff repairs by reliably and firmly sealing without draining the water, resulting in a significant cost reduction compared to the conventional water shutoff process where water shutoff repairs cannot be performed without completely draining the water. This is an innovative water-stopping construction method that has various excellent effects, such as ensuring reliable water-stopping.

[Brief explanation of drawings]

The drawings show one embodiment of the invention.
The figure is a cross-sectional view of the main part when sludge and precipitates have been removed, Figure 2 is a slope view of the main part when the filled or coated surface is sanded, and Figure 3 is a cross-sectional view of the main part when the filled or coated part is in a V-cut state. , FIG. 4 is a cross-sectional view of the main part in the filled or applied state, and FIG. 5 is a cross-sectional view of the main part when water stoppage is completed. 1...Irrigation canal, 1a...Concrete structure, 2...Adherence, 3...Crack, 4...Water,
5... Underwater worker, 6... Portable polishing device, 7...
resin adhesive.

Claims (1)

[Claims] 1. Water is stored and supplied to cracks that occur on the inner surface of a fire prevention water tank, irrigation canal, or other water equipment, or other parts of a building where water is constantly stored and supplied through cracks or gaps between joints. In this state, a resin adhesive that can be applied and cured even in water, which is mainly composed of an epoxy resin and an amine curing agent, is applied or filled to seal the area. This method is characterized by expelling the moisture inside the gap and curing the water by replacing it with the membrane of the membrane.