JP3185163B2 - Water stoppage method for joints of concrete structures - 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 a joint of a concrete structure, and more particularly to a method of water leakage through a pocket angle type water stopping member buried in a joint of a concrete structure. The present invention relates to a water-stopping method characterized in that a water-stopping material resin is press-injected to stop water.

[0002]

2. Description of the Related Art For the purpose of solving the conventional problems, the present applicant has already proposed a method of waterproofing a joint of a concrete structure according to Japanese Patent Application No. 44080/1992. After that, the waterproofing method has been applied on site.

[0003]

However, various problems as described below have newly occurred in on-site construction. 1. For the water-stopping material supply tube, it takes a lot of trouble to insert the coarse tube into the fine tube. 2. The coarse tube as the core material is hard, does not easily fit into the surface of the precast concrete, and a gap is easily formed between the surface and the concrete surface. 3. Since the tube is circular, the cement paste wraps around the lower side and the water blocking material supply hole is blocked. 4. In particular, in the case of soft concrete having a large slump, the cement paste easily flows around, and the tendency is large when a vibrator is used.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to propose a method of waterproofing a joint of a concrete structure in which such problems are improved. That is, according to the present invention, a thin steel sheet is bent into an inverted V shape, and
And seal both ends with a board, pass water and water-stopping resin through the bottom, and pass cement paste through.
A non- sponge sheet is attached, and on the slope, a pocket angle type water-stopping member constructed by connecting a water-stopping material resin injection hose is laid on the surface of the precast concrete joint, and then post-punched After the concrete is cast, a water-stopping method for a splicing part of a concrete structure is characterized by injecting a water-stopping material resin into the water leaking portion of the splicing part through the embedded water-stopping member. is there.

[0005] In the invention, it is desirable that the water stopping material resin injection hose pocket Angled water-shutoff member laid in striking joints, which are embedded to exposed outside the ball striking joints. Further, in the method of the present invention, it is necessary to press-inject water into the water-stopping member in advance to check for water leakage at the joint, and to press-inject the water-stopping material resin into the water-leakage point to prevent water leakage. Is preferred.

[0006]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view of the water stopping method of the present invention, and FIG. 2 is a construction diagram of the water stopping method. In the drawing, 1 is a pocket angle type water blocking member, 2 is an angled body, 3 is a board, 4 is a sponge sheet, 5 is an injection hose, 6 is a mounting hardware, 7 is a pre-cast concrete, 8 is a joint, 9 Is post-cast concrete, 10
Is a formwork. The pocket angle type water blocking member 1 used in the water blocking method of the present invention is formed by bending a 0.8 mm thin steel plate into an inverted V shape, and further bending both side edges horizontally,
A 90-cm long angled body 2 with overhanging edges 2a, 2a is used as a single member. At the time of construction, three 90-cm angled bodies 2 are arranged, connected at a lapped margin of 1 cm, fixed with mounting hardware 6, and have a total length of about 90 cm. An angle body 2 of 270 cm is formed. Both ends of the angled body 2 having a length of about 270 cm are sealed with triangular foamed styrene boards 3 and 3 to form a water blocking member 1 having a triangular prism-shaped hollow pocket body. An injection pipe 5a is fitted in an injection hole 2b formed in the slope of the angled body 2, and an injection hose 5 is connected to the injection pipe 5a. The injection hole 2b is tightly joined to the injection pipe 5a and the injection hose 5,
The water-stopping material resin can be pressed and injected into the angle body 2 through the hose 5. The injection pipe 5a is preferably made of a chemically stable plastic such as polyethylene, and the injection hose 5 is also preferably made of a chemically stable plastic and flexible.

[0007] As the water-stopping material resin, "NL paste"
(Trade name: hydrophilic one-component polyurethane prepolymer manufactured by Takeda Pharmaceutical Co., Ltd.) was used. Edges 2a, 2 where the angled body 2 and the precast concrete 7 are in contact with each other.
A sponge sheet 4 is adhered to the bottom surface of a. The sponge sheet 4 is a P.O. A synthetic fiber nonwoven fabric reinforced with a P (polypropylene) cloth sheet and a large number of communicating pores in which urethane foam is integrally bonded. (Having the cement dispersed therein) is impervious and has suitable characteristics adapted to the waterproofing method of the present invention.

Next, the construction method of the present invention will be described. 1. The pocket angle type waterproofing member 1 is laid in the joint portion 8 of the precast concrete 7 before the outer reinforcement is completed and before the inner reinforcement is performed. 6 is the mounting hardware of about 90c
Driven at m intervals. 2. It is not necessary to lay the water-stopping member 1 continuously with respect to the joint 8, and about 3.5 m depending on the shape of the joint 8.
Alternatively, about 5.3 m is laid as one injection unit. In addition, at the time of placing the post-cast concrete 9, the infiltration of the cement paste is prevented by the sponge sheet 4 having the above characteristics. 3. The angle bodies 2 having a length of about 90 cm are overlapped with each other at an overlap amount of about 1 cm, and connected to one injection unit to be laid. In addition, the sponge sheet 4 is not stuck on the overlapping part. 4. It is not necessary to connect the water stopping member 1 to the L shape also at the corner portion.

[0009] 5. The mounting interval of the water-stopping material resin injection pipe 5a to the water-stopping member 1 is set to about 2 m to 2.5 m, and two to three locations per one water-stopping member 1. 6. The injection hose 5 is a formwork 10 of post-cast concrete 9
A groove is dug into the surface 7a of the precast concrete 7 so as not to be in contact with the lower end of the formwork 10 so as not to hinder the assembling of the precast concrete 7 and is exposed outside the joint portion 8. . It is desirable to cure the exposed injection hose 5 in a temporary enclosure or the like so as not to damage the hose. 7. If after-casting concrete 9 is cast and the formwork 10 is disassembled and water is leaked in the joint 8, a water-stopping material resin (NL paste) is injected into the water-stopping member 1 via the injection hose 5. The water is effectively stopped by injecting pressure. In addition,
The injected water-stopping material resin is diffused from the water-stopping member 1 through the sponge sheet 4 to the joining surface 8 and fills the water-leak point to reliably stop water. 8. Further, in the present invention, by pressing and injecting water into the water-stopping member 1 in advance, the water penetrates through the sponge sheet 4 into a portion where water leaks, so that the presence or absence of water leakage of the joint portion 8 can be confirmed. . The water leakage can be prevented by press-injecting the water-stopping material resin into the water leakage location confirmed in this way. Note that a manual chemical pump having a capacity of about 6 l was used for pressure injection of the NL paste of the water-stopping material resin.

[0010]

The water stopping method according to the present invention has the above-mentioned structure and operation, so that the construction is simpler and cheaper than the conventional method, and effective and reliable water stopping can be achieved. Further, water leakage by with post-deposited a buried water stop water through the member by pressing injected leakage points in concrete after casting can be pre-diagnosis, stop water by filling a water stopping material resin to the individual stations prevention of it is possible.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a water stopping method according to the present invention.

FIG. 2 is a construction drawing of the present waterproofing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pocket angle type water stopping member 2 Angle body 2a Edge 2b Injection hole 3 Triangular board 4 Sponge sheet 5 Injection hose 5a Injection pipe 6 Mounting hardware 7 Precast concrete 7a Surface 8 Jointed part 9 Postcast concrete 10 Formwork

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Matsuhisa Matsuhisa 1-5-52 Yaga, Higashi-ku, Hiroshima City, Hiroshima Prefecture Inside Fuji Chemical Co., Ltd. (56) References JP-A-2-204529 (JP, A) Kaihei 1-163365 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) E04G 21/02 103

Claims (3)

(57) [Claims] 1. A thin steel plate is bent into an inverted V-shape and both sides thereof
Bend the edge horizontally and seal both ends with a board,
Water and waterproof material resin are passed through the bottom, and cement
Attach a sponge sheet with a large number of communicating pores that are not allowed to pass through , and further attach a pocket angle type water-blocking member that is connected Concrete structure characterized by laying on the surface of the joint, and then casting after-casting concrete, and then press-injecting a water-stopping material resin into the leaking portion of the joint through the buried water-stopping member. Water-stop construction method for connecting parts. 2. A hose for injecting a water-blocking material resin of a pocket angle type water-blocking member laid on a joint portion, wherein the hose is embedded so as to be exposed outside the joint portion. Term
1 Symbol placement waterproofing construction method of the punching joint portion of the concrete structure of the. 3. The method according to claim 1, wherein water is injected into said water-stopping member in advance to check whether or not water is leaked at said joint, and water-stopping material resin is pressed and injected into said water-leakage point to prevent water leakage. waterproofing construction method of the punching joint portion according to claim 1 or 2 noise Re concrete structure of crab wherein.