JP2005163479A - Resin injecting hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin injecting hose by which a loose concrete paste produced upon placing a new concrete for jointing hardly enters, and high water-stop performance is achieved at the joint part of concrete members. <P>SOLUTION: The resin injecting hose 10 is structured in a manner that at least communicating holes 19 formed in a high pressure hose 20, having a plurality of the communicating holes 19 communicating a hollow part 25 with the outside, are covered by a waterproof covering material 15 which is made to have a strength to be broken by a predetermined pressure applied in an out-of-plane direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a resin injection hose, and more particularly to a resin injection hose for injecting a water-stopping injection resin that reacts with water and expands in gaps and cracks generated in a joint portion or the like of a concrete member.

Conventionally, many water-stopping methods using a water-stopping injection resin that expands by reacting with water have been implemented as countermeasures against water leakage at the joints of concrete members. Such a water stop construction method, for example, as shown in Patent Document 1, after disposing a so-called PW hose having a mesh connecting the hollow portion and the outside on the outer peripheral surface on the joint surface of an existing concrete member. A new concrete is cast over, and after curing for the required time, an injection resin for water stop is injected into the inside of the PW hose.
As a result, the water-stopping injection resin in the PW hose reacts with the water entering from the water leaking portion of the joint portion of the concrete member and foams and expands, and the expansion pressure causes the water-stopping injection resin to flow into the concrete. It penetrates into the joint part of the water and stops the water leakage.

Japanese Patent Laid-Open No. 9-4230 (see p2, FIG. 1)

However, when the above-described method is applied to a thick-walled civil engineering structure, the paste-like concrete liberation that occurs during the joining of new concrete penetrates into the PW hose, and the PW hose is blocked by hardening of the entered concrete liberation. Therefore, even when there is a water leakage place in the vicinity where the PW hose is arranged, there is a case in which the water stop injection resin cannot be injected and the water stop effect cannot be sufficiently exhibited.
On the other hand, in order to prevent the blockage of the PW hose, a method is known in which the inside of the PW hose is washed with high-pressure water or the like several hours after the completion of placing new concrete and the next day to eliminate the concrete free matter. The work is complicated and increases the cost.

  In view of the above circumstances, the present invention is to provide a resin-injected hose that exhibits a high water-stopping performance at the joint portion of a concrete member that is difficult for the paste-like concrete free portion generated during the joining of new concrete to enter. It is aimed.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that at least the communication hole of the high-pressure hose provided with a plurality of communication holes communicating with the hollow portion and the outside is at a predetermined pressure acting in the out-of-plane direction. Provided is a resin injection hose which is covered with a waterproof covering material formed to have a breaking strength.

  In order to solve the above-mentioned problem, the invention according to claim 2 is characterized in that at least the communication hole of the high-pressure hose provided with a plurality of communication holes communicating with the hollow portion and the outside is at a predetermined pressure acting in the out-of-plane direction. Provided is a resin injection hose which is covered with a waterproof covering material so as to be rolled up to open the communication hole.

  In order to solve the above-mentioned problems, a third aspect of the present invention is the resin injection hose according to the first or second aspect, wherein the covering material is a waterproof glass cloth.

  In order to solve the above-mentioned problems, according to a fourth aspect of the present invention, in the resin injection hose according to the third aspect, the waterproof glass cloth is formed in a tape shape and wound around the surface of the high-pressure hose. It is characterized by being arranged.

  In order to solve the above problem, the invention according to claim 5 is the resin injection hose according to any one of claims 1 to 4, wherein the high-pressure hose is an inner and outer peripheral surface of a cylindrical core material made of a cloth material. Is formed in a triple structure covered with a synthetic resin, and is provided with a plurality of communication holes communicating with the hollow portion and the outside with a predetermined spacing in the length direction.

According to the resin injection hose according to claim 1, the coating material suppresses a phenomenon in which a paste-like concrete free part generated when a new concrete is joined tries to enter the inside of the high-pressure hose constituting the resin injection hose. Therefore, the high-pressure hose is not blocked after a new concrete is cast. As a result, it is possible to reliably fill the high-pressure hose with an injecting resin for water-stopping the joint portion of the concrete member.
In addition, with a simple method of press-fitting the injection resin into the high-pressure hose with a predetermined amount of pressure, the covering material is broken to uniformly inject the injection resin from all the communication holes provided in the high-pressure hose. It can be leached into the joint.

  According to the resin injection hose according to claim 2, the coating material suppresses a phenomenon in which a paste-like concrete free portion generated when a new concrete is joined tries to enter the inside of the high-pressure hose constituting the resin injection hose. In addition, the coating material is rolled up with a predetermined pressure acting in the out-of-plane direction to open the communication hole, so that the resin for injection is uniformly injected from all the communication holes provided in the high-pressure hose without breaking the coating material. Can be leached into the joint portion of the concrete member.

  According to the resin injection hose according to claim 3, since the covering material is a waterproof glass cloth, it does not stretch and has excellent electrical insulation, and a metal such as a reinforcing bar disposed in a joint portion of concrete or the like. There is an effect that does not corrode.

  According to the resin injection hose of the fourth aspect, since the glass cloth is formed in a tape shape and is disposed so as to wind the surface of the high pressure hose, it can be easily disposed on the high pressure hose. There is an effect that can be done.

  According to the resin injection hose according to claim 5, the high-pressure hose is formed in a triple structure in which the inner and outer peripheral surfaces of the cylindrical core material made of the cloth material are covered with the synthetic resin, and has a predetermined separation interval in the length direction. Since there are provided a plurality of communication holes for communicating the hollow portion with the outside, there is an effect that it is possible to ensure the strength that does not deform or break even when the injection resin is injected into the hollow portion at a high pressure. .

Next, the resin injection hose according to the present invention will be described in detail based on a preferred embodiment shown in FIGS. The illustrated resin injection hose 10 generally has a predetermined pressure acting in the out-of-plane direction on at least each communication hole 19 of the high-pressure hose 20 provided with a plurality of communication holes 19 communicating with the hollow portion 25 and the outside. That is, it is configured to be covered with a waterproof covering material 15 formed to have a strength that is broken by pressure when injecting the injecting resin 7 which expands by reacting with water.
Thus, the high-pressure hose 20 can be reliably filled with the injecting resin 7 because it is not clogged by the paste-like concrete free portion generated when the new concrete is handed over. When intruding into the part, the covering material 15 closing the communication hole 19 is broken by the injection pressure of the injection resin 7 so that the injection resin 7 is leached into the connection part and the joint part of the concrete member It forms a high water-stop structure.

  As shown in FIG. 1B, the resin injection hose 10 in the present embodiment includes a high-pressure hose 20 and a covering material 15. As shown in FIG. 1A, the high-pressure hose 20 is a high-pressure hose used for press-fitting liquid. The inner and outer peripheral surfaces of a cylindrical core material 20a made of a cloth material are made of synthetic resin members 20b and 20b. The three-layer structure is covered so that the high-pressure hose 20 itself is not deformed or broken even when a liquid is pressed into the hollow portion 25.

A plurality of communication holes 19 are drilled on the outer peripheral surface of the high-pressure hose 20 with a predetermined spacing interval in the circumferential direction, and a plurality of communication holes are also drilled with a predetermined spacing interval in the length direction. ing. The communication hole 19 has a function of leaching the injecting resin 7 that expands and expands by reacting with water press-fitted into the hollow portion 25 of the high-pressure hose 20. Since the high-pressure hose 20 itself has a triple structure that does not break due to the internal pressure when the liquid is pressed into the hollow portion as described above, the high-pressure injection resin 7 Even when leached from the communication hole 19, the shape does not change or break.
In the present embodiment, the communication holes 19 are arranged in a staggered manner in the length direction of the high-pressure hose 2, but the arrangement is not necessarily limited to this, for example, in parallel along the length direction. You may arrange in any place, such as arranging and forming. Further, the communication hole 19 may be provided with a ring-shaped cover for protecting the communication hole 19 from being broken by the water 6 leached at a high pressure or the injection resin 7. The cover may be made of metal or synthetic resin, but is not necessarily limited to the material.

On the other hand, the covering material 15 is disposed by winding the outer peripheral surface of the high-pressure hose 2 as shown in FIG. As the covering material 15, it is preferable to use a glass cloth made of glass fiber that is excellent in electrical insulation, does not corrode metal, and hardly generates elongation. And this coating | covering material 15 is formed in the intensity | strength which fractures | ruptures when the pressure more than predetermined is applied.
An acrylic adhesive material is applied to the back surface of the covering material 15 for the purpose of temporarily fixing the outer surface of the high-pressure hose 20 to the outer surface of the high-pressure hose 20 and imparting water-stopping performance to the covering material 15.

In the present embodiment, these covering materials 15 are wound around the entire outer peripheral surface of the high-pressure hose 20, but this is not necessarily the case. For example, as shown in FIG. The covering material 15 may be partially wound so as to cover at least the communication hole 19 provided in the cover.
As shown in FIG. 2B, the covering material 15 can also cover the periphery of the high-pressure hose 20 with the covering material 15 by inserting the high-pressure hose 20 into the inside of the covering material 15 formed in a cylindrical shape. . In this case, if the covering material 15 is formed seamlessly, it is possible to effectively prevent the water 6 from entering the high-pressure hose 20.
Further, the covering material 15 is not limited to covering the opening of the communication hole 19 by being disposed on the outer peripheral surface of the high-pressure hose 20 as described above. For example, the covering material 15 is inserted into the communication hole 19. It can also be arranged. That is, the covering material 15 can be packed so as to have a strength that opens when a predetermined pressure or more is applied to the communication hole 19.

As shown in FIG. 5 (a), the resin injection hose 10 having the above-described configuration includes an injection tube 3 for injecting an injection resin 7 and water 6 for reaction with one end, and a high pressure hose at the other end. 2 can be connected to an injecting resin 7 and a discharge pipe 4 for discharging water 6.
These are formed by press-fitting water 6 and injecting resin 7 in this order into the high-pressure hose 20 through the injection tube 3. First, as shown in FIG. The covering material 15 covering 19 is ruptured, and the water 6 enters a gap generated in the joint portion of the concrete member. Next, as shown in FIG. 3B, the internal pressure of the injection resin 7 due to the injection of the injection resin 7 completely opens the fractured portion of the covering material 15 caused by the water pressure, and the injection hole 19 is used for injection. The resin 7 is leached into the gap generated in the joint portion of the concrete member, reacts with the water 6 that has advanced earlier, and expands and expands to form a water-stop structure.

  Note that the injection of the injection resin 7 using the water pressure and the injection of the injection resin is not necessarily limited to the above-described embodiment. For example, if the covering material 15 is disposed on the high-pressure hose 20 so as to cover the communication hole 19 in the vicinity of the end portion in the width direction of the covering material 15, the covering material 15 is brought into contact with the high-pressure hose 20 by water pressure as shown in FIG. Further, the end portion of the covering material 15 is rolled up by press-fitting the injection resin 7, and the communication hole 19 of the high-pressure hose 20 is exposed. Thus, even if the covering material 15 is not broken, the injection resin 7 can be uniformly leached into the joint portion of the concrete member from all the communication holes provided in the high-pressure hose without being obstructed by the covering material 15. It becomes.

  Next, the effect | action of the resin injection hose 10 mentioned above is explained in full detail below.

(First step)
First, as shown to Fig.5 (a), the resin injection hose 1 is arrange | positioned and fixed to the joint surface 8 of the existing concrete member.
At this time, one end of the resin injection hose 10 is injected into the high-pressure hose 20 with the injection resin 7 and water 6 for reacting therewith, and the other end is injected with the high-pressure hose 20. 7 and a discharge pipe 4 for discharging water 6 for reaction therewith are attached. In addition, the inside of the resin injection hose 10 is kept at a predetermined pressure on the discharge pipe 4 side, and when the inside of the resin injection hose 10 becomes higher than the set pressure, the water 6 or the injection resin 7 is opened. A pressure regulating valve (not shown) for discharging from the discharge pipe 4 is interposed.

(Second step)
Then, new concrete is handed over to the joint surface 8 of the existing concrete member and cured and hardened.
At this time, the paste-like concrete free portion generated at the time of joining the new concrete is covered with the communication hole 19 formed around the resin injection hose 10 by the covering material 15, so that the injection resin 7 later Does not enter the hollow portion 25 of the high-pressure hose 20 filled with the.

(Third step)
When the transferred concrete is cured, water 6 for reacting with the injection resin 7 is injected into the high-pressure hose 20 of the resin injection hose 10 through the injection pipe 3.
At this time, since the inside of the resin injection hose 10 can be held at a high pressure by a pressure adjusting valve (not shown), the water 6 can be injected with a pressure sufficient to cause the coating material 15 to break. Thereby, the covering material 15 covering the communication hole 19 of the high-pressure hose 20 is broken, and the water 6 is leached from the broken portion into the joint portion of the concrete member. In addition, the permeation | transmission state of the water 6 to the clearance gap produced in the joint part of the concrete member is confirmed by observing the discharge amount of the water 6 in the discharge pipe 4.

(Fourth process)
When it is confirmed that the water 6 has penetrated into the gap generated in the joint portion of the concrete member, the injection resin 7 is press-fitted into the high-pressure hose 20 of the resin injection hose 10 through the injection pipe 3.
At this time, the injection resin 7 has a pressure sufficient to completely open the rupture portion caused by the high water pressure so as not to be obstructed by the covering material 15 and to ooze out from the communication hole 19 of the high-pressure hose 20. Press fit with. As a result, the covering material 15 covering the communication hole 19 of the high-pressure hose 20 is completely opened, and the pouring resin 7 is leached from the fractured portion (opening portion) into the joint portion of the concrete member.

  In addition, since the resin material 7 for injection advances reaction, following the water 6, as shown in FIG.5 (b), the clearance gap of the joint part of a concrete member is previously immersed in the 3rd process. Therefore, the injecting resin 7 is efficiently leached into the gap generated in the joint portion of the concrete member and foamed and expanded, and a water stop structure can be formed with high accuracy in the concrete joint portion.

  In this embodiment, when a glass cloth that breaks at about 2 MPa is used for the covering material 15, the water 6 is about 4 MPa and the injection resin 7 is about 8 MPa, and is pressed into the resin injection hose 10. A necessary breakage was generated in the material 15 to form a reliable water stop structure for the joint portion of the concrete member. The pressure when the water 6 and the injection resin 7 are press-fitted into the resin injection hose 10 includes the strength of the covering material 15, the cross-sectional diameter of the high-pressure hose 20, the number and hole diameter of the communication holes 19, and the viscosity of the injection resin 7. It may be adjusted appropriately according to the conditions.

  In addition, concrete is cast by connecting with reinforcing bars and steel frames to the joint, but a gap of about 0.02 to 0.2 mm is formed due to shrinkage accompanying hardening of the concrete, and water enters and becomes water leakage. May appear. In order to reliably inject the injecting resin 7 into such a fine gap, for example, a resin that reacts with water and cures at a pressure of 10 to 30 Mpa is used in addition to using the foamed material as described above. It is possible. The resin injection hose 10 can sufficiently cope with such a pressure. In some cases, it is necessary to inject the injection resin 7 at a high pressure of about 100 MPa. In this case, if a metal fiber such as a piano wire is wound around the high-pressure hose 20, the resin injection hose 10 can reliably cope with such a high pressure.

As described above, the resin injection hose 10 according to the present invention can suppress the phenomenon in which the paste-like concrete liberated portion that occurs at the time of new concrete joining invades into the inside of the high-pressure hose 20 by the covering material 15. Therefore, the high-pressure hose 20 is not blocked after a new concrete member is joined. As a result, it is possible to reliably fill the resin injection hose 10 with the injection resin 7 for water-stopping the joint portion of the concrete member. Thus, the injection resin 7 can be uniformly leached into the joint portion of the concrete member.
Further, since the paste-like concrete free portion does not enter the hollow portion 25 of the high-pressure hose 20, it is not necessary to clean the hollow portion 25 of the high-pressure hose 20 when filling the injection resin 7, and workability is improved. It is possible to greatly contribute to the reduction of construction cost and the construction period.

  Further, when the concrete injection member 10 is spliced using the resin injection hose 10 according to the present invention, the resin injection hose 1 is uniformly injected from the entire length of the resin injection hose 1 and the vicinity of the entire surface into the gap portion generated in the joint portion of the concrete member. Since both resin 7 and water 6 can be supplied, foam expansion due to the reaction of water 6 and pouring resin 7 occurs surely in the gap formed in the joint portion of the concrete member, so that it occurs in the joint portion of the concrete member. It becomes possible to efficiently form a water stop structure with a simple configuration with respect to the gap.

(A) is a perspective view which shows the high pressure hose 20 in one Embodiment of the resin injection hose which concerns on this invention, (b) is a perspective view which shows one Embodiment of the resin injection hose which concerns on this invention. (a) is a perspective view showing an embodiment of a resin injection hose different from FIG. 1, and (b) is a perspective view showing another embodiment of a structure for arranging a covering material on a high-pressure hose. (A) is a schematic sectional drawing which shows the mode of a fracture | rupture of the coating | covering material by the water injection | pouring of the resin injection | pouring hose, (b) The schematic sectional drawing which shows the mode of the leaching of the resin for injection | pouring. It is sectional drawing which shows the state which the covering material rolled up by the injection | pouring of injection | pouring resin. (A) is explanatory drawing which shows a mode that water leaches out to a concrete joint part, (b) is explanatory drawing which shows leaching of the resin for injection | pouring.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Injection pipe 4 Discharge pipe 6 Water 7 Injection resin 8 Joint surface 10 Resin injection hose 15 Cover material 19 Communication hole 20 High pressure hose 20a Cylindrical core material 20b Synthetic resin member 25 Hollow part

Claims (5)

  Cover at least the communication hole of the high-pressure hose provided with a plurality of communication holes communicating with the hollow portion and the outside with a waterproof covering material formed to have a strength to break at a predetermined pressure acting in the out-of-plane direction. A resin injection hose characterized by comprising:   A waterproof coating so that at least the communication hole of the high-pressure hose provided with a plurality of communication holes communicating with the hollow portion and the outside is rolled up with a predetermined pressure acting in the out-of-plane direction to open the communication hole. A resin injection hose characterized by being covered with a material. In the resin injection hose according to claim 1 or 2,
The resin infusion hose characterized in that the covering material is a waterproof glass cloth. In the resin injection hose according to claim 3,
The resin-filled hose is characterized in that the waterproof glass cloth is formed in a tape shape and is disposed so as to wind the surface of the high-pressure hose. In the resin injection hose according to any one of claims 1 to 4,
The high-pressure hose is
The inner and outer peripheral surfaces of the cylindrical core material made of cloth material are formed in a triple structure covered with a synthetic resin, and a plurality of communication holes are provided to communicate the hollow portion and the outside with a predetermined spacing in the length direction. A resin injection hose characterized by having

Images