JP3904982B2 - Drug injection hose - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a drug injection hose, and more particularly to a drug injection hose that can be uniformly injected into a gap generated between a concrete joint by laying on a concrete joint surface.
[0002]
[Prior art]
In recent years, concrete structures are often built deep underground by using the deep underground method. In this construction, a building, for example, a tunnel, is divided into parts having the required strength and dimensions (hereinafter referred to as “segments”), and each segment is built on the ground and then installed deep in the ground. Assembly is performed to connect the segments. Buildings with particularly complex structures are built on the ground. In addition, when these buildings are installed in a space with water such as seawater, lake water, and groundwater, it is essential to stop the water against high water pressure.
[0003]
To connect the segments that make up the concrete building, install reinforcing bars such as reinforcing bars in the joints of the segments and install the formwork around it, and then pour the concrete into the formwork. Connect the segments with each other. However, since there is a time difference in solidification in casting between the segment and the poured concrete, it is difficult to achieve continuous adhesion between the segment and the concrete, and a gap is generated at the boundary between the segment and the concrete. Further, when the concrete hardens, the cement in the concrete shrinks, and shrinkage cracks, cracks, and the like are generated at the interface between the cement and sand or the cement and gravel. Since water oozes through these gaps, a chemical such as a water-stopping agent is injected into the gaps. In this method, as in the embodiment shown in FIG. 5, the conventional drug injection hose 16 is fixed to the joint surface 81 of the segment by the concrete nail 26. After that, in a state where both the reinforcing bar 83 and the conventional drug injection hose 16 are installed, concrete is driven into the joint portion of the segment covered with the mold 84. After the concrete is hardened, the medicine is injected from all the mouths of the conventional medicine injection hose 16 projecting out from the concrete. For example, the drug reacts with water that permeates the inside of a conventional drug injection hose, and expands and expands. The expansion | swelling pressure which the chemical | medical agent has is filled with the chemical | medical agent in the clearance gap between the segment and concrete, etc., and the clearance gap between a segment and concrete is filled up.
Conventionally, as shown in FIG. 6, for example, the conventional drug injecting hose 16 used by the method is arranged in parallel with two resin hoses 17 having holes with a size of 1 to 3 mm. The glass cloth 18 was arranged on the outside.
[0004]
[Problems to be solved by the invention]
However, since the conventional drug injection hose 16 used in the above method has a structure that allows water to pass therethrough, the drug cannot be reliably injected into the gap.
This is because the cement moves with water in the concrete before the concrete is hardened. As shown in FIG. 7A, the conventional drug injection hose 16 that allows water to pass through functions as a filter, separates water and cement, and water penetrates into the inside. Therefore, as shown in FIG. 7B, after water passes, a cement-based layer 50 is formed in the vicinity of the surface 19 of the drug injection hose. This layer is in the form of a mortar that is very dense with a very high proportion of cement. After curing, there is no space on the surface 19 of the drug injection hose for the path of the drug 5 and the like. That is, as shown in FIG. 7C, the cement-based layer 50 prevents the foaming force and / or leakage of the drug 5 from the conventional drug injection hose 16. Therefore, the chemical | medical agent 5 did not osmose | permeate the crack which generate | occur | produced by the clearance gap between the segment 80 and concrete, and the shrinkage | contraction at the time of concrete solidification. The conventional chemical injection hose 16 having a structure that allows water to pass through the conventional method could not close the concrete gap. As a result, there is a problem that the gap is not sufficiently blocked and water leakage or the like cannot be reliably prevented.
[0005]
Accordingly, the problems to be solved by the present invention are to provide a drug injection hose that does not form a cement-based layer on the surface of the drug injection hose for injecting a drug such as a water-stopping agent, and to discharge the drug in the cement particles. Providing a hose for injecting a drug that does not block the gap, and by using this hose, a gap or the like generated by placing concrete such as a water-stopping agent from the hollow part of the hose for injecting the drug It is possible to press fit into.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 is a drug injection hose used when a drug is injected at a high pressure into a gap generated in a joint surface of concrete, etc.
A pressure-resistant hose in which a plurality of discharge parts for discharging a drug are formed around the porous inner covering material, which is disposed so as to cover the periphery of the pressure-resistant hose and uniformly spills the drug discharged from the discharge part; And an outer covering material that is disposed so as to cover the outer side of the inner covering material, has heat resistance and water impermeability, and is broken by the injected medicine. To do.
[0007]
In order to solve the above problems, the invention according to claim 2 is characterized in that, in the drug injecting hose according to claim 1, the inner covering material is a glass fiber cloth-like material having heat resistance. Provided is a drug injection hose.
[0009]
In order to solve the above problem, the invention according to claim 3 is the drug injecting hose according to claim 1 or 2, wherein the outer covering material is formed of a material that is dissolved by a component contained in the drug. A hose for injecting a drug is provided.
[0010]
In order to solve the above-mentioned problem, the invention according to claim 4 is the drug injection hose according to any one of claims 1 to 3 , wherein a joint for attaching the drug injection nipple to the end is attached. A drug injection hose is provided which is capable of injecting a drug at a high pressure by connecting a drug injection nipple to a joint.
[0011]
In order to solve the above-mentioned problem, the invention according to claim 5 is the chemical injection hose according to any one of claims 1 to 4 , wherein the chemical is a water-stopping agent for preventing water leakage in concrete. There is provided a hose for injecting a drug characterized by the above.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, based on one illustrated embodiment, the medicine injection hose according to the present invention will be described in more detail.
[0013]
1 (a) and 1 (b) are a front view and a cross-sectional view showing the structure of an embodiment of a drug injection hose according to the present invention. The illustrated drug injection hose 10 includes at least a pressure-resistant hose 11 having a hollow portion 15 through which the drug 5 passes, and a plurality of discharge portions 11a for discharging the injected drug 5 to the surroundings, and a pressure-resistant hose. 11 has an inner covering material 12 arranged so as to cover the periphery of 11, and an outer covering material 13 arranged so as to cover the outer side of the inner covering material 12.
[0014]
The pressure-resistant hose 11 has such a strength that the hollow portion 15 that is a passage for the drug 5 is not crushed by the weight, pressure, or the like of the concrete 30 for the purpose of fixing the segments 80 (see FIG. 2) and joining the segments 80. And has a strength that does not stretch or break from the inside by the pressure at which the drug 5 is injected, and is made of a material that is not reactive with the drug 5 passing through the inside. In addition, the pressure-resistant hose 11 is provided with a discharge portion 11 a that smoothly discharges the medicine 5. The discharge part 11a of these pressure-resistant hoses 11 has a size and shape such as a slit, a circle, and a square so as not to impair the hose strength.
[0015]
The inner covering material 12 is disposed outside the pressure-resistant hose 11 and has a porous shape so that the medicine 5 discharged from the pressure-resistant hose 11 can be oozed out uniformly. The inner covering material 12 is used for injecting the drug 5 at a high temperature in order to promote the chemical reaction of the drug 5 passing through the inside of the pressure-resistant hose 11 and for attaching the steel frame 83 and the like performed simultaneously with the installation of the drug injecting hose 10. Assuming that the inner covering material 12 is exposed to high temperature due to sparks caused by welding or the like and scattering of the welding rod, it is preferable to form the inner covering material 12 with a heat-resistant glass fiber cloth material, stainless mesh or the like.
The inner covering material 12 can also be produced by being woven in a mesh shape with metal fibers or the like .
[0016]
The outer covering material 13 is disposed so as to cover the outer side of the inner covering material 12, and is made of a material having heat resistance and water impermeability. Due to the heat resistance, the outer covering material 13 does not melt and break due to sparks, welding debris, etc. that are worked simultaneously with the installation of the drug injection hose 10, and the pressure resistance that constitutes the drug injection hose 10. The hose 11 and the inner covering material 12 are prevented from being exposed, and the pressure-resistant hose 11 and the inner covering material 12 constituting the drug injection hose 10 are protected. Moreover, in order not to allow water to permeate from the outside to the inside, the outer covering material 13 needs to be impermeable to water and have no holes. Further, the outer covering material 13 is easily broken by the mechanical force, for example, pressure, etc. by the chemical 5 discharged through the inside of the chemical injection hose 10, and the chemical 5 is discharged from the chemical injection hose 10 to the outside. It is possible to extend to the inside of the concrete 30 and the gap of the joint portion of the segment 80. On the other hand, it has the effect of a protective film that protects the pressure-resistant hose 11 and the inner covering material 12 from the outside without being destroyed by the weight of the concrete 30, the pressure, the impact at the time of construction of the concrete building, and the like. The outer covering material 13 having such an effect is preferably composed of a synthetic resin such as polyethylene and polypropylene which is excellent in rigidity and impact resistance.
[0017]
On the other hand, the outer covering material 13 can also be made of a material that reacts and dissolves by contact with chemical components constituting part or all of the drug 5. Due to the chemical reaction, the outer covering material 13 is broken and a path for discharging the drug 5 to the outside is formed. For example, the outer covering material 13 is made of a material such as vinyl chloride or acrylic, and a chemical 5 such as a water-stopping material comprising an organic solvent such as acetone, thinner or toluene is used to The covering material 13 is melted, and a route for discharging the medicine 5 to the outside is secured .
[0018]
The joint 22 for attaching the drug injection nipple 23 is attached to the end of the drug injection hose 10 according to the present invention. By attaching the drug injection nipple 23 to the joint 22, the drug 5 is about 30 MPa, for example. It becomes possible to inject at high pressure. Thereby, the chemical | medical agent 5 penetrates also into the small clearance gap 33 etc. of 0.02 mm-0.2 mm between the segment 80 and the concrete 30. FIG. Of course, the drug 5 is filled in a larger gap than that. The hose 10 for injecting the drug is attached by the hose fixture 20 or the like, but when it is bent and attached, an attachment jig such as the high pressure elbow 21 having the bending angle may be used.
[0019]
The chemical 5 that discharges through the inside of the chemical injection hose 10 to the outside and closes the gap 33 and the like between the segment 80 and the concrete 30 contains a water-stopping agent. The said water stop agent has the water stop agent which hardens | cures by contacting and mixing with water. Further, when the outer covering material 13 is a material that reacts and dissolves with the components of the water stopping material, the water stopping agent includes a component that reacts with the outer covering material 13 to dissolve and break the outer covering material 13. It is preferable that
[0020]
In the preferred embodiment shown in FIG. 2, the chemical injection hose 10, the reinforcing bar 83, and the formwork 84 are attached to the joint surface 81 of the concrete building segment 80, after which the concrete 30 is cast, Are joined. The end portion of the drug injection hose 10 extends from the concrete 30 and a joint 22 for mounting the drug injection nipple 23 is attached. The drug 5 can be injected at a high pressure from the high pressure pump 24.
Hereinafter, the discharge process of the medicine 5 will be described with reference to FIGS.
[0021]
The outer covering material 13 is impermeable to water, and water does not enter the drug injection hose 10. Therefore, the cement-based layer 50 as shown in FIG. 5 is not formed on the surface 19 of the drug injection hose of FIGS. 3 and 4 without inducing a concentration of cement on the surface 19 of the drug injection hose. . That is, on the surface 19 of the drug injection hose, there are a gap 32 between the drug injection hose 10 and the concrete 30 and a gap 33 between the segment 80 and the concrete 30, and a path through which the drug 5 permeates is maintained.
[0022]
The drug 5 such as a water-stopper injected at a pressure of 25 MPa or more from the high-pressure pump 24 passes through the hollow portion 15 of the pressure-resistant hose 11 in the drug injection hose 10 and fills the drug injection hose 10. . The drug 5 that has passed through the drug injection hose 10 is discharged from the discharge part 11 a of the pressure-resistant hose 11. The discharged medicine 5 is further squeezed out uniformly from the porous inner covering material 12.
[0023]
The drug 5 discharged from the pressure-resistant hose 11 and the inner covering material 12 reaches the outer covering material 13. Since the discharge pressure of the medicine 5 is high, the outer covering material 13 is broken by the pressure. Therefore, the drug 5 is injected into the gap 32 between the drug injection hose 10 and the concrete 30, the gap 33 between the segment 80 and the concrete 30, and the concrete gap 31 from the outer covering material 13 broken by the drug 5. .
On the other hand, when the outer covering material 13 reacts and dissolves with the medicine 5, the medicine 5 discharged from the pressure-resistant hose 11 and the inner covering material 12 is separated from the gap 32 between the medicine injection hose 10 and the concrete 30, and the segment 80. And high pressure is injected into the gap 33 and the concrete gap 31.
[0024]
Even after the filling is finished, the medicine 5 is kept at a high pressure by the medicine injection nipple 23. The joint 22, the nipple 23 for injecting the drug, and the like that are protruding from the cement after the drug 5 is hardened are cut and the cement surface is surface-treated so as to be flat.
[0025]
As described above, by using the drug injection hose 10 according to the present invention, the cement-based layer 50 is not formed on the surface 19 of the drug injection hose, and the gap 32 between the drug injection hose 10 and the concrete 30, the segment The medicine 5 can reach and close the gap 33 between the 80 and the concrete 30 and the gap 31 between the concrete.
[0026]
【The invention's effect】
According to the first aspect of the present invention, the effect of preventing the cement-based layer from being formed on the surface of the drug injection hose and the outer covering material has heat resistance, so This has the effect of eliminating the risk of the drug injection hose being damaged, melted, etc. even in a high-temperature environment accompanying the welding work of reinforcing bars that proceeds simultaneously with the burial work.
[0027]
According to the second aspect of the present invention, since the inner covering material is formed from a glass fiber cloth-like material, it is under a high temperature environment accompanying a welding operation of a reinforcing bar that proceeds simultaneously with the embedding work of the drug injection hose. However, it has the effect of eliminating the risk that the drug injection hose is damaged, melted, etc., and together with the heat-resistant outer covering material described in the drug injection hose according to claim 1, It has the effect of further improving heat resistance.
[0029]
According to the third aspect of the present invention, since the outer covering material is formed of a material that dissolves by a chemical reaction, a drug that contains a component that reacts with the outer covering material and dissolves the outer covering material is contained. By using, it has the effect of dissolving the outer covering material and reliably discharging the medicine to the outside.
[0030]
According to the fourth aspect of the present invention, since the joint is attached to the end of the medicine injection hose and the medicine injection nipple can be attached, the medicine is injected into the medicine injection hose at a high pressure. The medicine has an effect that the outer covering material is broken from the inside.
[0031]
According to the fifth aspect of the present invention, since the applied chemical is a water-stopping material, it can be used for repairing concrete, penetrates the gap between the segment and concrete efficiently, closes the gap, and stops. Has the effect of watering.
[Brief description of the drawings]
FIG. 1 (a) is a front view showing the structure of a drug injection hose according to the present invention, and FIG. 1 (b) is a cross-sectional view of the drug injection hose according to the present invention.
FIG. 2 is a schematic view showing an embodiment for joining each segment of a concrete building using the chemical injection hose according to the present invention.
FIGS. 3A and 3B are schematic cross-sectional views showing an embodiment of a drug injection hose according to the present invention in accordance with a drug injection process. FIG. ) Represents after drug injection.
FIGS. 4A and 4B are schematic cross-sectional views showing an embodiment of a drug injection hose according to the present invention in accordance with a drug injection process. FIG. ) Represents after drug injection.
FIG. 5 is a schematic view showing a conventional example for joining each segment of a concrete building using a conventional chemical injection hose.
FIG. 6 is a schematic view of a conventional drug injection hose.
7 (a), (b), and (c) are schematic cross-sectional views of a conventional example of application of a chemical injection hose. (A) is for concrete injection, and (b) is a formation of a cement-based layer. (C) represents the time of injection of the drug.
[Explanation of symbols]
5 Drug 10 Drug injection hose 11 Pressure-resistant hose 11a Discharge part 12 Inner coating material 13 Outer coating material 15 Hollow part 16 Conventional drug injection hose 17 Resin hose 18 Glass cloth 19 Surface of drug injection hose 20 Hose fixing Tool 21 High pressure elbow 22 Joint 23 Drug injection nipple 24 High pressure pump 26 Concrete nail 30 Concrete 31 Concrete gap 32 Drug injection hose and concrete gap 33 Segment-concrete gap 50 Cement-based layer 80 Segment 81 Segment Bonding surface 83 Reinforcing bar 84 Formwork

Claims (5)

A chemical injection hose to be used when injecting a chemical at a high pressure into a gap generated in a joint surface of concrete,
A pressure-resistant hose in which a plurality of discharge portions for discharging a medicine are formed around the periphery;
A porous inner covering material that is arranged so as to cover the periphery of the pressure-resistant hose, and uniformly spills the medicine discharged from the discharge portion; and
An outer covering material disposed so as to cover the outer side of the inner covering material, having heat resistance and water impermeability and being torn by an injected drug;
A hose for injecting medicine configured to be provided with. In the hose for medicine injection according to claim 1,
The inner covering material is a cloth-like material made of glass fiber having heat resistance. In the hose for medicine injection according to claim 1 or 2 ,
The hose for injecting medicine, wherein the outer covering material is formed of a material that is dissolved by a component contained in the medicine. In the hose for medicine injection according to any one of claims 1 to 3 ,
A drug injection hose characterized in that a joint for attaching a drug injection nipple to an end can be attached, and a drug injection nipple is connected to the joint so that a drug can be injected at a high pressure. . In the hose for medicine injection according to any one of claims 1 to 4 ,
A chemical injection hose, wherein the chemical is a water stopping agent for preventing water leakage in concrete.

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