JPH08277540A - Chemical feeding hose, and concrete structure-sealing method using its hose - Google Patents

Abstract

PURPOSE: To allow chemicals to smoothly permeate into the joint part of structures, by a method wherein the chemicals are passed-through from inside of a tube to outside thereof, ready mixed concreat is prevented from entering chemical injection way of a core-made tube to be heated at the time when electricity is turned on, and to periphery of its tube is covered with material having a low melting point. CONSTITUTION: A chemical feeding hose 1 is stuck on a part to be connected on one side of a concreate body with adhesive tape, and ready mixed concreate is placed being in contact with its part. In this case, until the ready mixed concreate placed is allowed to solidify, the periphery of a core-made tube 2 of the hose 1 is covered with a housing layer 3, and the ready mixed concrete placed is prevent from entering a chemical injection way 4. After that, a placed concrete body is formed, following which an electric current is applied to the tube 2, the tube 2 is heated, and the housing layer 3 is heated and melted, and finally the whole or part of the housing layer 3 is removed. At this time, chemicals are injected into the chemical injection way 4 of the tube 2 and are discharged toward the outside of the tube 2 out of the inside thereof through the stitches of the tube 2 and spaces between wire members. Furthermore, the chemicals permeate into a joint part at which a concrete body is joined to the placed concreat body, foam, and is allowed to harden, and the joint part is sealed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical solution injection hose for sealing a connection portion of a concrete structure and a method for sealing a concrete structure using the hose.

[0002]

2. Description of the Related Art Green concrete is poured into contact with a connecting portion of a concrete body, and when the concrete is solidified, a pouring concrete body is formed. Cheap. In order to inject a chemical liquid mixed with a sealing agent, a foaming agent, a curing agent, etc. into a gap generated at a jointing portion in the connection portion of the concrete structure, for example, Japanese Patent Publication No. 6-5062.
The one disclosed in Japanese Patent Publication No. 75 is known. In this, a regularly perforated feed tube is covered with a compressible casing having through-holes.

[0003]

By the way, in the chemical solution injecting hose having the above-mentioned structure, the clogging of the perforation of the feed tube is prevented by the casing, but it is injected into the feed tube. When the chemical liquid is discharged through the perforations, the casing may be an obstacle to the discharge of the chemical liquid, and the chemical liquid may not sufficiently penetrate into the connection portion of the concrete structure.

In view of the above problems, an object of the present invention is to provide a chemical solution injecting hose capable of smoothly permeating a chemical solution into a connecting portion of a concrete structure and a sealing method for a concrete structure using the hose. Is to provide.

[0005]

In order to achieve the above-mentioned object, a chemical solution injection hose according to the invention of claim 1 is a chemical solution injection hose internally provided at a connecting portion between a concrete body and a cast concrete body. And a core tube made of a material that generates heat when an electric current is applied to the core tube, and the core tube has a cylinder structure that allows the passage of the chemical solution from the inside of the cylinder to the outside of the cylinder. And a sheath layer made of a low-melting material covering the outer periphery of the core cylinder so that fresh concrete does not enter the outside of the concentric cylinder to the chemical liquid injection path. Further, a method for sealing a concrete structure using the chemical liquid injection hose according to the invention of claim 2 is a seal for sealing a connection portion between a concrete body and a cast concrete body using the chemical liquid injection hose of claim 1. The construction method,
A step of arranging the chemical liquid injection hose at the connection portion of the concrete body, and pouring fresh concrete in contact with the connection portion of the concrete body to solidify the chemical liquid injection hose in a buried state to form a cast concrete body A step of applying an electric current to the core tube of the chemical solution injecting hose to generate heat, and heating and melting the jacket layer based on the generated heat to remove the jacket layer; and a seal in the chemical solution injection path of the core tube. And a step of injecting a chemical solution for.

[0006]

In the present invention configured as described above,
After the chemical solution injection hose is fixed to the connection part on one side of the concrete body, fresh concrete is driven into contact with the connection part of the concrete body, and the connection part of the concrete body and the connection part of the driven fresh concrete A chemical injection hose is buried between them. Then, the ready-mixed concrete is solidified to form a cast concrete body. Since the outer circumference of the core tube of the chemical solution injection hose is covered with the outer coating layer, the problem that fresh concrete enters the chemical solution injection path of the core tube does not occur. After the green concrete is solidified and the cast concrete is formed by this, the jacket layer is heated and melted based on the energization heat generation of the core tube, and the jacket layer is removed from the outer periphery of the core tube. By thus injecting the chemical liquid into the chemical liquid injection path of the core cylinder in a state where the outer coat layer is removed from the outer periphery of the core cylinder, the chemical liquid is well discharged to the outside of the core cylinder, It penetrates into the gap at the joint part of the connection with the concrete casting body without any shortage.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the chemical liquid injection hose 1 includes a core cylinder 2 and an outer cover layer 3. The core cylinder 2 has a chemical liquid injection path 4 in the cylinder, and has a cylindrical structure that allows passage of the chemical liquid from the inside to the outside of the cylinder, for example, as shown in FIG. 1, is knitted in a lattice shape or a blade shape. The net is rolled into a tubular shape. Further, the core tube 2 may be formed into a tubular shape by spirally winding a wire rod as shown in FIG. further,
The core tube 2 is formed of a material that generates heat when an electric current is applied, for example, a metal wire material such as steel or stainless steel or carbon fiber.

The outer coat layer 3 covers the outer periphery of the core cylinder 2 so as to prevent fresh concrete from entering the chemical liquid injection path 4 from outside the core cylinder 2, and the core cylinder 2 is energized to generate heat. It is formed of a thin sheet made of a low melting point resin, a wax, etc.

Next, the function of the chemical solution injection hose of this embodiment constructed as described above and the method of sealing the concrete structure will be described with reference to FIGS. First, as shown in FIG. 3, the chemical solution injection hose 1 is fixed to a connection portion on one side surface of the concrete body 11 by a fixing means, for example, an adhesive tape 12. Further, as shown in FIG. 7 (A), when the concrete body 11 is molded in a factory, the chemical solution injection hose 1 is embedded in one side surface of the concrete body 11 by embedding about half of its cross section. You may. Further, as shown in FIG. 7B, a recess having a semicircular cross section is formed on one side surface of the concrete body 11,
The liquid medicine injection hose 1 may be fitted and fixed in the recess 13.

As described above, after the chemical liquid injection hose 1 is fixed to the connection portion on one side of the concrete body 11, it is contacted with the connection portion of the concrete body 11 as shown in FIG. The fresh concrete 20 is poured in, and the chemical solution injection hose 1 is embedded between the connecting portion of the concrete body 11 and the connecting portion of the poured fresh concrete 20. And the concrete 2
When 0 is solidified, the cast concrete body 21 is formed. When the raw concrete 20 is solidified from being poured, the outer periphery of the core tube 2 of the chemical solution injection hose 1 is covered with the outer coating layer 3
The liquid injection path 4 of the core tube 2 because it is covered by
On the other hand, the problem that the ready-mixed concrete 20 penetrates does not occur.

After the ready-mixed concrete 20 is solidified and the cast concrete body 21 is formed by this, a required current is applied to the core tube 2, which causes the core tube 2 to generate heat. Then, the jacket layer 3 is heated and melted based on the heat generation of the core tube 2, and as shown in FIG.
Are wholly or partly removed.

Here, a liquid chemical solution 31 in which a sealing agent, a foaming agent, a curing agent, etc. are mixed is injected into the chemical solution inflow path 4 of the core tube 2. Then, the chemical liquid 31 is discharged from the inside to the outside through the stitches and the wire of the core tube 2.
Then, the discharged chemical liquid 31 is permeated into the gap in the splicing joint portion of the connection portion between the concrete body 11 and the cast concrete body 21 and is foamed and cured, whereby the connection portion is well sealed.

[0013]

As described above, according to the present invention, the chemical liquid can be smoothly permeated into the connection portion of the concrete structure, and the connection portion can be well sealed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a chemical liquid injection hose according to an embodiment of the present invention in a cutaway manner.

FIG. 2 is a perspective view showing an embodiment of a core tube.

FIG. 3 is a cross-sectional view showing a state in which a chemical liquid injection hose is similarly fixed to a connection portion of a concrete body.

FIG. 4 is a cross-sectional view showing a state in which green concrete is similarly placed in contact with a connection portion on a concrete body.

FIG. 5 is a cross-sectional view showing a state in which the outer coat layer of the chemical liquid injection hose is also removed.

FIG. 6 is a cross-sectional view showing a state in which a liquid medicine has been injected into the liquid medicine injection passage of the core cylinder.

FIG. 7 is a cross-sectional view showing an embodiment of means for fixing the chemical liquid injection hose to the connection portion of the concrete body.

[Explanation of symbols]

 1 Chemical Liquid Injection Hose 2 Core Cylinder 3 Outer Layer 4 Chemical Liquid Injection Channel 11 Concrete Body 21 Casting Concrete Body 31 Chemical Liquid

Front Page Continuation (72) Inventor Toshiaki Kobashi 64 Kasei Kogyo Co., Ltd. at No. 1 Buzuyama, Yokone Town, Obu City, Aichi Prefecture

Claims (2)

[Claims] 1. A chemical liquid injecting hose internally provided at a connecting portion between a concrete body and a cast concrete body, wherein a chemical liquid injecting passage is formed in the cylinder, and the chemical liquid is allowed to pass from the inside of the cylinder to the outside of the cylinder. And a core tube made of a material that generates heat when an electric current is applied to the core tube, and so that the concrete does not enter from the outside of the core tube to the liquid injection path of the core tube. A chemical solution injection hose, comprising: a sheath layer made of a low melting point material covering the outer periphery of the core tube. 2. A seal construction method for sealing a connection portion between a concrete body and a cast concrete body by using the chemical liquid injection hose according to claim 1, wherein the chemical liquid injection hose is arranged at the connection portion of the concrete body. A step of setting, a step of forming a cast concrete body by pouring fresh concrete in contact with the connection portion of the concrete body and solidifying in a state where the chemical solution injection hose is embedded; And heat to melt the jacket layer based on the heat generation to remove the jacket layer, and a step of injecting a drug solution for sealing into the drug solution injection path of the core cylinder. A method for sealing concrete structures using a chemical injection hose characterized in that