JPH08209944A - Method and device for forming cutoff for concrete structure - Google Patents

Abstract

PURPOSE: To shorten the time for construction of a cut-off by loading a silicone rubber body and pad metallic fittings, in which bulging preventive plates are provided downward to both side sections, along a long ditch excavated along the place of leakage and inserting a cut-off agent injection pipe and an air vent pipe. CONSTITUTION: A silicone rubber body 4 and pad metallic fittings 5 are superposed and placed along a U-shaped long ditch 3 digged at the cracked and leaked place 2 of the surface 1a of a concrete structure 1. A plurality of bulging preventive plates 7 are provided downward to the pad metallic fittings 5, and a plurality of triangular angles 6 are arranged onto the top face of the pad metallic fittings 5 and fixed by anchor bolts 9. A cut-off agent injection pipe 8a and an air vent pipe 8b are inserted into holes bored to the stack of the silicone rubber body 4 and the pad metallic fittings 5, and a cut-off agent P is injected into a pocket section in the injection pipe 8a and a cut-off body is formed at blowing pressure. Accordingly, a function is improved by lightening, thus allowing the mass production of products.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a water stop at a cracked and leaking point on the surface of a concrete structure, and more particularly to a water stop forming method and apparatus used in a simple water stop construction method.

[0002]

2. Description of the Related Art The applicant of the present application has already proposed that a concrete structure suitable for water-stop treatment of cracked and leaked points on the surface of a concrete structure in the patent application for 1992 Japanese Patent Application No. 253413. We propose a water-stopping method for products and a water-stopping tool. The above-mentioned water stop method is called the pin pad water stop method (trade name), and its contents are the first step of forming a long groove along the leak point on the concrete structure surface and the long groove on the concrete structure surface. Along the surface of a pressing unit made of a chemically stable sheepskin-like synthetic rubber having a hydrophilic-liquid polyurethane prepolymer injection hole at one end and an air vent hole at the other end, and pressing the end of the pressing unit. Second step of stably pressing the fixing unit from the upper part with a fixing unit made of a rigid pressing plate, and the polymer from the hydrophilic-liquid type polyurethane prepolymer injection hole of the pressing unit in the long groove of the concrete structure surface. It is characterized by comprising a third step of discharging the air in the long groove from the air vent hole of the plate unit at the same time as injecting it into the inside of the plate unit, and a fourth step of thereafter sealing both holes and leaving them to stand. A water stopping construction method of the concrete structure to, and is characterized in the use of jelly-like synthetic rubber contact plate unit as water stop devices used in the practice of the waterproof construction method. However, in putting the above-mentioned water stop method into practical use, regarding the water stop tool to be used, the illustrated plate unit is made of sheep cane-like synthetic rubber, and a long rigid plate with an inverted T-shaped cross section is provided on its back. The fixing unit of the plate unit is equipped with an L-shaped groove for inserting an anchor bolt on the side of the flat plate, and the functionality, mass productivity, and production taking weight into consideration. From the viewpoint of cost and the like, there has been a need for improvement of the waterproofing tool of the waterproofing method.

[0003]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and provides an improved water-stop forming method and apparatus which can effectively carry out the above-mentioned pin pad water-stopping method. Is what you are trying to do. That is, the present invention relates to a first step of forming a long groove along a water leakage site on a concrete structure surface, and a hydrophilic one-pack type polyurethane prepolymer injection hole at one end along the long groove on the concrete structure surface. And the surface of the chemically stable sheepskin-like synthetic rubber equivalent having an air vent hole at the other end is pressed, and then the rear surface of the equivalent is substantially flush with the equivalent and the injection hole pipe insertion hole and A second step of loading a metal fitting having an air venting pipe insertion hole and swelling prevention plates installed vertically on both sides, and pressing a fixed metal fitting from above, and a filling hole for the synthetic rubber material. At the same time as injecting the hydrophilic one-pack type polyurethane prepolymer into the long groove of the concrete structure, at the same time, the third step of discharging the air in the long groove from the air vent of the rubber equivalent, and then sealing both holes. It's the 4th process of leaving it alone A waterproofing method of forming a concrete structure comprising. Further, the present invention provides a chemically stable one-component type polyurethane prepolymer injection hole at one end and an air vent hole at the other end, which is pressed along a long groove cut along a water leakage point of a concrete structure. Of synthetic rubber-like synthetic rubber and the same type of synthetic-rubber-like synthetic rubber loaded on the same, and having the injection hole pipe insertion hole and the air vent hole pipe insertion hole. A water stop forming device for a concrete structure, comprising a metal member having swelling prevention plates vertically provided on both sides and a fixing tool for fixing each of the constituent elements to the surface of the concrete structure. In addition, it is preferable that the fixing tool includes a triangular angle and an anchor bolt.

[0004]

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a state where the water stop forming device of the present invention is attached to the surface of a concrete structure, and FIG. 2 is a front sectional view showing the state where the water stop forming device is attached. In the figure, 1a is the surface of a concrete structure, 2 is a cracked water leakage point, 3 is a U-shaped long groove cut along the water leakage point of a concrete structure, 4
Is a sheep-like silicon rubber body (a sheep-like synthetic rubber object), 5 is a metal object, 6 is a triangular angle (fixed metal object), 7
Is a swelling prevention plate with hanging plates on both sides, 8a and 8b are injection pipes and air vent pipes of hydrophilic one-component polyurethane prepolymer, 9 is an anchor bolt, P is hydrophilic one-component polyurethane prepolymer water stop It is an agent. The water stop forming apparatus of the present embodiment is a sheep's wheel type, a chemically stable silicone rubber body 4 having a hydrophilic one-pack type polyurethane prepolymer injection hole at one end and an air vent hole at the other end, and the silicone rubber body 4.
Having the same plane shape and overlapping with each other, having a trough shape and having the injection hole pipe insertion hole and the air vent hole pipe insertion hole,
A high-rigidity metal fitting 5 in which a swelling prevention plate 7 made of a rigid plate of appropriate length is vertically installed so as to sandwich both side surfaces of the lower silicon rubber body 4 overlapped at the lower ends of both sides thereof, and the corresponding metal material 5
Which is sufficiently longer than the width of the above, and has high-rigidity triangular angles 6 formed through holes for anchor bolts at both ends thereof, and the both ends of the above-mentioned vertically stacked silicon rubber body 4 and the metal fitting 5. A water blocking agent injection pipe 8a and an air bleeding pipe 8b made of an aluminum alloy which are inserted into the water blocking agent injection hole and the air bleeding hole, which are screwed upright on the concrete structure surface 1a,
It is composed of an anchor bolt 9 for inserting and fastening both ends of a triangular angle (fixed metal object) 6, a nut 9a thereof and a washer 9b. In addition, the above-mentioned silicone rubber body 4
The metal member 5 and the metal fitting 5 may be integrally bonded or may be engaged with a metal fitting to facilitate handling. Further, the water blocking agent injection hole and the air vent hole formed at both ends of the stack of the silicon rubber body 4 and the metal fitting 5 may be a common hole having the same inner diameter, and the water stop agent injection pipe 8a and the air vent pipe 8b are not the same. With respect to the diameter, one may be used for injecting the waterproofing agent and the other for bleeding air.
Further, it is preferable that the joint surface between the gutter-shaped metal member 5 and the main body of the swelling prevention plate 7 that is coupled as if gripping the metal member 5 is bonded by welding.

Next, a detailed description will be given of the method for forming the water stop of the concrete structure and the work for mounting the apparatus. (1) First, the silicon rubber body 4 and the metal fitting 5 are placed on the surface 1a of the concrete structure 1 along the U-shaped long groove 3 cut in the cracked and leaking portion 2. In this water stop forming method, the silicon rubber body 4 needs to completely cover the U-shaped long groove 3, and when the long groove 3 is long, a plurality of silicon rubber bodies 4 are arranged in series and covered. When the long groove 3 is bent, it is difficult to cover with the silicone rubber body 4 and a protruding portion is generated, but the long groove 3 at the protruding portion should be filled with a quick-setting cement or an underwater bond for sealing. is necessary.
The metal member 5 has a plurality of swelling prevention plates 7, and the longer the length of the hanging plates on both side surfaces is, the more effective the swelling prevention of the rubber body 4 is. (2) Next, the upper surface of the metal fitting 5 is passed over and a plurality of triangular angles 6 are provisionally arranged, and the positions of the anchor bolt holes are marked on the concrete structure surface 1a. After that, the anchor bolt 9 is screwed upright at the marking position, the triangular angle 6 is inserted, and the nut 9a and the washer 9 are inserted.
Tighten b and press the metal 5 to press the silicon rubber body 4 against the surface 1a. In addition, the triangular angle 6 can pressurize the metal fitting 5 in a balanced manner at both ends thereof. Further, since the silicone rubber body 4 is a plastic material having excellent chemical stability and elasticity, even if the concrete surface 1a has some irregularities, it is possible to closely follow the pressure welding.

(3) Next, the silicon rubber body 4 and the metal fitting 5
The water blocking agent injection pipe 8a and the air bleeding pipe 8b are inserted into the holes formed in the stack. (4) By the above, the attachment of the water stop forming device of the present invention is completed, the U-shaped long groove 3 is closed, and the water blocking agent injecting pocket portion is formed. (5) After that, when the water blocking agent P such as "NL paste" (hydrophilic-liquid polyurethane polymer) is injected into the pocket portion from the injection pipe 8a and flows out from the air vent pipe 8b, the injection pipe described above is used. 8a and the air vent pipe 8b are plugged with wood. Allow to stand for 12 to 24 hours, during which the hydrophilic one-pack type polyurethane prepolymer water blocking agent reacts with crack leakage of concrete structure to foam,
The water-blocking agent is carried to the depth of the crack by the foaming pressure and is polymerized and cured to form a water-blocking body. (6) After that, the triangular angle 6 and the anchor bolt 9 are removed, and further the metal fitting 5 is removed from the silicon rubber body 4. Then, the silicon rubber body 4 partially bonded to the concrete surface 1 is grasped from its end portion by hand and peeled off and removed. Finally, the anchor bolt screw holes on the surface 1 are surface-finished, for example, by filling quick-setting cement, and the water-stop treatment by the pin-pad water-stop method is completed.

[0007]

As described above, according to the water stop forming method and apparatus of the present invention, the installation of the apparatus becomes simpler and more reliable than before, the function is enhanced by the weight reduction, and the mass production of the product becomes possible. It is possible to reduce the material cost and work time, and it is extremely effective for implementing the water stop method.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a water stop forming device according to an embodiment of the present invention is attached to a surface of a concrete structure.

FIG. 2 is a front cross-sectional view of an attached state of the water stop forming device.

[Explanation of symbols]

 1 Concrete Structure 1a Concrete Surface 2 Crack Leakage Location 3 U-shaped Long Groove 4 Silicon Rubber Body 5 Metal Material 6 Triangular Angle 7 Bulge Blocking Plate 8a Water Stopper Injection Pipe 8b Air Venting Pipe 9 Anchor Bolt 9a Nut 9b Washer P Water Stopper

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Matsubayashi Matsuju 3-11-6, Konan, Naka-ku, Hiroshima City, Hiroshima Prefecture (72) Inventor Shoji Saito, Prince, Kita-ku, Tokyo 5-2-4-512 (72) Invention Hiroshi Miura 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Tadashi Ishikawa 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Tadashi Ono Tokyo 1-2-3 Shibaura, Minato-ku, Shimizu Construction Co., Ltd. (72) Inventor Yukimasa Kikuchi 1-6-4-103 Kizawa, Toda City, Saitama Prefecture (72) Tamio Maki, 3-8 Hinode, Honjo City, Saitama Prefecture -24-409 (72) Inventor Machii Politics 30-10 Futaba-cho, Itabashi-ku, Tokyo (72) Inventor Naoyuki Nakayama 3-37-12 Kitanodai, Hachioji City, Tokyo (72) Inventor Shuichi Moriyama Kamifukuoka City, Saitama Prefecture 1-4-13 Kamifukuoka

Claims (3)

[Claims] 1. A first step of forming a long groove along a water leakage point on a concrete structure surface, and a hydrophilic one-pack type polyurethane prepolymer injection hole at one end along the long groove on the concrete structure surface. The surface of a chemically stable sheepskin-like synthetic rubber equivalent having an air vent hole at the other end is pressed against it, and then the rear surface of the equivalent is substantially flush with the equivalent and the pipe insertion hole for the injection hole and the air. A second step of loading a metal fitting having a hole for inserting a pipe and vertically swelling prevention plates on both sides, and pressing a fixed metal from above, and the injection hole of the synthetic rubber equivalent. At the same time as injecting the hydrophilic one-pack type polyurethane prepolymer into the long groove of the concrete structure, at the same time, the third step of discharging the air in the long groove from the air vent hole of the rubber equivalent, and then sealing both holes. A process consisting of a fourth step to leave Method for forming a water stop of a structure. 2. A chemical stability having a hydrophilic one-component polyurethane prepolymer injection hole at one end and an air vent hole at the other end pressed against a long groove cut along a water leakage point of a concrete structure. Of the sheep cane-like synthetic rubber, and the injection hole pipe inserting hole and the air venting pipe inserting hole having substantially the same plane shape as that of the sheep cane-like synthetic rubber object A water stop forming device for a concrete structure, comprising a metal member having swelling prevention plates provided on both sides thereof and a fixing tool for fixing the respective constituent elements to the surface of the concrete structure. 3. The water stop forming device according to claim 2, wherein the fixing tool comprises a triangular angle and an anchor bolt.