JPH10176423A - Cut-off method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut off water even when the pressure of leakage water is high and the volume thereof is large, by attaching a porous sheet so as to cover a water leakage position of a building frame and arranging a plate to cover the whole face thereof and fixing it and injecting a hydrophilic polymerization setting type cut-off liquid agent from injection openings formed on the plate to impregnate it therewith. SOLUTION: A plurality of bolts 3 are perpendicularly protruded and fixed to the periphery of the junker part 2 of a waterleakaging side face of a building frame 1 of concrete or the like. A porous sheet 4 connected to the outside face is attached to the building frame 1 so as to cover the junker part 2 and a plate 5 of stainless steel or the like is arranged on the sheet to cover almost the whole face of the porous sheet 4, and nuts are fastened to the bolts 3 to firmly fix the plate 5 to the building frame 1. A hydrophilic polymerization setting type cut-off liquid agent is injected from an injection opening 5a formed on the plate 5 to impregnate the porous sheet therewith. In this way, a sufficient cut-off function is kept and water leakage can be cut-off even when a bleeding channel thereof has been widened or narrowed.

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 at a water leaking point, and more particularly, to maintaining a sufficient water stoppage even when the water pressure of the water leak is high and the amount of water leaking is large, and furthermore, the water leaking point is enlarged. Another object of the present invention is to provide a water stoppage method that does not cause water leakage even when the water is narrowed.

[0002]

2. Description of the Related Art Conventionally, the following method is known as a method for stopping water leakage from a large crack such as a junk portion formed in a skeleton made of concrete or the like. First, with a plurality of vinyl tubes inserted into the water leaking area, the circumference of these tubes is covered with quick-setting cement so that water leaks out through the tubes.
Next, one of the above-mentioned plurality of tubes is mechanically sealed one after another, and a waterproofing agent is injected under high pressure into an unsealed tube to be instantaneously hardened. And shut off the water.

[0003]

However, the above-mentioned conventional waterproofing method has the following problems. When water is stopped by the above method, the strength of the water stop portion is not sufficient. Therefore, when the water pressure of the water leak is high, the water stop portion is damaged by the water pressure, and water leakage may occur again. In addition, when the amount of water leakage is extremely large, the above method cannot be applied, and it is practically difficult to stop the water. In addition, when the temperature of the skeleton fluctuates due to temperature changes, the skeleton may expand and contract, and the interval between water leakage points may be expanded or narrowed. As a result, the water stop portion may be damaged, and re-leakage may occur. . The present invention has been made in view of the above circumstances, and has a high water pressure of water leakage, maintains sufficient water stoppage even when the amount of water leakage is large, and prevents water leakage even when the area of the water leakage area is enlarged or narrowed. The purpose is to provide a waterproof construction method that does not occur.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to apply a porous sheet communicating with the outer surface to a water leakage point of a skeleton so as to cover the water leakage point. The plate body is fixed to the body in a state where the plate body is arranged over the water, and a hydrophilic polymerization-curable liquid waterproofing agent is injected from an injection port provided in the plate body, and impregnated into the porous sheet by a water stopping method. Will be resolved.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of a water stopping method according to the present invention will be described with reference to FIG. In the figure, reference numeral 1 denotes a skeleton made of concrete or the like, and reference numeral 2 denotes a junker portion of the skeleton 1 which becomes a water leakage point. The junker portion is a portion in which fresh concrete is not sufficiently filled at the time of placing concrete, and a part of the junker remains as an empty space, through which water enters from outside.

In the method of this example, first, a plurality of bolts 3 are fixed around the junk portion 2 on the side of the water leaking out of the frame 1 so as to project substantially perpendicularly to the wall surface of the frame 1. Next, the porous body sheet 4 is applied to the skeleton 1 so as to cover the junkers 2. This porous body sheet 4
It is made of a porous body communicating with the outer surface. The porous sheet 4 is pressed against the water-stop portion to hold and harden the hydrophilic liquid water-stopping agent therein, and has excellent mechanical strength (compression strength and tensile strength) and elasticity. It is preferable that the material has excellent elasticity, excellent durability, and easily penetrates the hydrophilic liquid waterproofing agent. A foam having an open-cell structure, a fiber mass formed by entanglement of relatively hard fibers, and the like are preferable. Used for

The porous body has a compressive strength (JIS
 5kg / cm ^TwoAbove, tensile strength
(Based on JIS K6301) 2kg / cm^TwoAbove
Use with a degree (according to JIS K6301) of 50% or more
Is preferred. These values are within the above range
The water pressure of the leak is high, and even when the amount of
The space between the junkers 2 can be increased by the expansion and contraction of the frame 1
Even when it changes, the porous body can follow this change.
This is preferable because re-leakage hardly occurs. Specific of this porous body
Examples include urethane foam, steel wool, etc.
it can. Especially, use urethane foam without cell membrane
Is preferred.

[0008] The porous sheet 4 is made large enough to completely cover the junker portion 2 and its thickness is appropriately set according to the amount of water leakage and the like.
mm. A plurality of insertion holes 4 a for inserting the bolts 3 are formed in the vicinity of the peripheral portion of the porous sheet 4. Further, the number of the porous body sheets 4 may be one, and about two to ten sheets may be laminated and used.

Next, the plate 5 is disposed on the porous sheet 4. The plate 5 is for keeping the porous body sheet 4 in contact with the frame 1, and is preferably made of a highly rigid material such as stainless steel or carbon steel.
The plate 5 has a size to cover almost the entire surface of the porous sheet 4 and preferably has a thickness of 0.5 to 3 cm. At the substantially center of the plate body 5, an injection port 5a for injecting a waterproofing agent is provided.
Are formed. The inner diameter of the inlet 5a is 6 to 51 mm
(1/4 "to 2").
a has a plug 9 through a brushing 7 and a nipple 8.
Can be installed. Plate 5
A plurality of insertion holes 5b for inserting the bolts 3 are formed in the vicinity of the peripheral edge portion.

Next, a nut or the like is fastened to the bolt 3 to firmly fix the plate 5 to the frame 1. As a result, the porous sheet 4 is strongly pressed against the skeleton 1 and is brought into contact with no gap. At this time, most of the water leaked from the junker portion 2 flows out through the inlet 5a because of low resistance, and the peripheral edge of the porous sheet 4 is strongly pressed against the frame 1 by the plate 5 so that the water leaks out. Therefore, only a small part of the water leaks out from the peripheral portion of the porous sheet 4. In this state, quick-setting cement mortar or the like is applied between the peripheral portion of the plate 5 and the frame 1 to stop water from this portion.

Next, the liquid waterproofing agent is injected from the injection port 5a of the plate body 5 with an injection pressure of 1 to 150 using a general-purpose injection pump.
It is injected at a rate of kg / cm ² to impregnate the porous sheet 4. After the injection is completed, the injection port 5a is sealed with, for example, a blind cap. The water-stopping agent is hydrophilic and polymerization-curable, that is, contains one or more types of monomers, and has a low viscosity and fluidity before the monomers are polymerized,
A type that cures with the polymerization reaction of the above monomer is preferable, for example, a type obtained by adding a polymerization catalyst to a crosslinkable monomer and a vinyl monomer together with water is used,
The vinyl monomer is preferably a hydrophilic vinyl monomer, and examples of the hydrophilic vinyl monomer include (meth) acrylic acid and its metal salts, vinyl acetate, vinyl alcohol, maleic acid and its metal salts, and among these. In this case, metal (meth) acrylate is preferred. As the metal ion forming the metal (meth) acrylate, any metal ion can be used, and for example, a magnesium salt can be preferably used.

As the crosslinkable monomer, a polyfunctional monomer is used. Among these, polyfunctional (meth) acrylates are preferable, and among such (meth) acrylates, one having relatively high hydrophilicity is preferred. More preferably, a main chain composed of two or more alkylene glycols is provided with (meth) acryloyloxy groups at both ends. Specific examples of such polyfunctional monomers include ethylene glycol di (meth) acrylate, diethylene glycol di Examples include (meth) acrylate, triethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, and polypropylene glycol di (meth) acrylate. .

The crosslinkable monomer and vinyl monomer are
After mixing, the mixture is polymerized for a fixed curing time, and becomes a hydrogel state and is cured. In addition, as a water-stopping agent, it is insoluble in water in a hardened state, has sufficient elasticity, has watertightness, that is, has a property of swelling by absorbing water, and has chemical resistance and bacterial resistance. Heat cycle resistance (-70 ~
(100 ° C.), and excellent in acid resistance and alkalinity are preferably used.

As the polymerization catalyst used for the water-stopping agent, a redox catalyst is preferably used. As the redox catalyst, for example, those containing ammonium persulfate, potassium persulfate and the like as oxidizing agents and sodium thiosulfate, Rongalite, sodium sulfite, triethanolamine and the like as reducing agents can be used. The amount of the polymerization catalyst to be added is usually 0.1 to 100 parts by weight with respect to 100 parts by weight of the monomer, but is appropriately selected from the above range so that the curing time of the water stopping agent is 5 to 60 seconds. It is preferable to set.

The mixing ratio of each component in the water-stopping agent is not particularly limited, but is 12 to 24% by weight of a polyfunctional monomer, 8 to 16% by weight of a vinyl monomer, 50 to 70% by weight of water, Amine component 1 in redox catalyst
A mixture of 0% by weight of the A agent and an equal weight mixture of ethylene glycol and water and the B agent of 0.5 to 2% by weight of the peroxide are mixed immediately before use.

The water-stopping agent separates at least a part of the above components from other components so that the polymerization reaction does not proceed, and mixes them immediately before use. It is used so that it is injected into the porous sheet 4 while it is in an uncured state. The injected water-stopping agent spreads over the entire porous sheet 4 and reaches the surface of the skeleton 1 in contact with the porous sheet 4 and hardens in a state where the junk portion 2 is completely sealed by contacting the surface without any gap. At this time, the water-stopping agent hardens in a state where the water-stopping agent is almost in contact with the frame 1 without being adhered thereto.

When the water of the junction 2 is stopped according to the above-mentioned method, the water pressure is high and the water can be reliably stopped even when the amount of water leakage is large. That is, when the water pressure of the leak is high, for example, 0.5 kg / cm ² or more, and the amount of water leak is large, the force in the water leak direction is applied to the porous sheet 4 by the water pressure. Since the plate body 5 having high rigidity is strongly pressed against the skeleton 1, the water leakage pressure is suppressed here, and the amount of water entering the porous sheet 4 is also reduced. Therefore, the operation of injecting the water stopping agent into the porous body sheet 4 can be easily performed, and the water leakage hardly occurs after the water stopping.

Further, since the water-stopping agent impregnates the porous sheet 4 having elasticity and compressive elasticity and is not adhered to the skeleton 1, the temperature of the skeleton 1 fluctuates due to a change in temperature and the like. The length fluctuates slightly and Junka part 2
Even when the distance between the two is increased or decreased, the porous sheet 4 and the water stopping agent keep the state in which the jumper portion 2 is sealed without breaking. In addition, since the cured product of the water stopping agent has a property of absorbing water and expanding, it comes into contact with water leakage, swells by absorbing the water leakage, and comes into contact with the frame 1 more densely. Further enhanced.

In the above water stopping method, a highly rigid plate 5 is arranged on a porous sheet 4 covering the junk portion 2 of the skeleton 1, and the plate 5 is fixed to the skeleton 1. Even when the water pressure is high and the amount of water leakage is large, the porous sheet 4 can be kept in contact with the frame 1 without any gap, the junker portion 2 can be kept in a sealed state, and the water stopping property can be maintained. Further, even when the interval between the junk portions 2 is enlarged or narrowed, the porous sheet 4 keeps the state where the junk portion 2 is sealed, and the water stopping property can be maintained.

[0020]

EXAMPLES The effects of the present invention will be further clarified by showing specific examples. (Example) The waterproofing method of the present invention was applied to water leakage from a junk part of an existing reinforced concrete wall having a length of 20 m, a height of 7 m and a thickness of 40 cm. This wall is
One side is a water storage section, and this side is always in contact with water. At a position corresponding to a water depth of 0.5 m in the water storage section of this wall, there was a junker section having a distance of 100 mm and a length of 20 cm along the length direction, and water leaked constantly from this section.

First, eight bolts were fixed so as to protrude perpendicularly to the wall around the junk portion on the side of leakage seepage of the wall. Next, six urethane foam sheets, each of which is a rectangular porous sheet having a width of 60 cm, a height of 1 m, and a thickness of 10 mm, are prepared and stacked, and the entire junker portion is completely covered on the wall. Guessed. On this foam sheet, width 60cm, height 1m, thickness 6m
A rectangular stainless steel plate was disposed, and the plate was fixed to the wall using the bolts. The plate had an inlet having a diameter of 1/4 "at the center thereof. Then, a quick-setting cement was applied between the peripheral portion of the plate and the wall, and after water was stopped in this portion, the general purpose was used. A water-stopping agent was injected from the above-mentioned inlet at an injection pressure of 20 kg / cm ² by using an injection pump of the formula (1) to impregnate the entire foam sheet as polyethylene glycol dimethacrylate 25% by weight, magnesium acrylate A consisting of 10% by weight, 55% by weight of water and 10% by weight of triethanolamine
Agent, ethylene glycol 49.5% by weight, water 49.5
B consisting of 1% by weight of ammonium persulfate
The mixture was used immediately before use. After leaving the water stopped according to the above method for one year, it was examined whether or not water leakage had occurred.

(Comparative Example) Five vinyl tubes were inserted into the junk portion of the wall in the same manner as in the embodiment over the length thereof, and the junk portion was left using quick-setting cement while leaving the tube. After closing one of the tubes, the other was bent and sealed, and then a hardening type waterproofing agent made of urethane resin was injected into the unsealed tube to close the tube. After leaving the water stopped wall for one year, it was examined whether or not water leakage had occurred.

As a result of the above test, the wall stopped by the method of the comparative example was damaged at the water-stopped portion, and water leakage occurred. On the other hand, the wall stopped by the method of the example: It was found that no water leakage occurred and good water stopping was maintained.

[0024]

As described above, in the water stopping method according to the present invention, the plate is disposed on the porous sheet covering the water leakage point of the frame, and the plate is fixed to the frame. Even when the water pressure of the water leakage is high and the amount of water leakage is large, the porous sheet can be kept in contact with the skeleton without gaps, and the water leakage point can be maintained in a sealed state, and the water stopping property can be maintained. Also, even if the gap between the water leaks is enlarged or narrowed,
It is possible to maintain a state in which the porous sheet seals the water leaking portion and maintain the water stopping property.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a skeleton that has been stopped by an example of a water stopping method according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body, 2 ... Junker part (water leakage point), 4 ... Porous sheet, 5 ... Plate, 5a ... Injection port

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kenji Sawada 10-1 Ogurocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Nichito Kagaku Kogyo Co., Ltd. 5-1 Nitto Chemical Industry Co., Ltd. (72) Inventor Toshizo Tada 3-51-1, Nomidai, Kanazawa-ku, Yokohama-shi, Kanagawa

Claims (1)

[Claims] 1. A porous sheet communicating with the outer surface is applied to a water leakage point of a skeleton so as to cover the water leakage point, and a plate covering almost the entire surface of the porous sheet is disposed thereon. A water stopping method comprising fixing a plate to a frame, injecting a hydrophilic polymerization-curable liquid waterproofing agent from an inlet provided in the plate, and impregnating the porous sheet.