JPH08184194A - Fluid filing method - Google Patents

Abstract

PURPOSE: To easily fill plural recessed parts with fluid by adhering a porous sheet material to a building frame so as to cover the recessed parts thereof, and providing a cover for preventing leak of the fluid, and filling the porous sheet material with the fluid from a filling port provided in the cover so that the fluid filled in the porous sheet material is flowed into the recessed parts. CONSTITUTION: A porous sheet material 5 is adhered to the back surface of a framework 1 by the adhesive agent 4, and a cover 6 is adhered thereon. A filling port is provided at a part of the cover 6, and a nozzle 7 is fitted in the filling port. When the fitting resin R is filled from the nozzle 7, the inside of the porous sheet material 5 is fulfilled with the resin R, and the resin intrudes into cracks 3 from a clearance of the adhesive agent 4. In the case of filling the resin R, the porous sheet material 5 is sealed at the right and left ends thereof by the appropriate means. In the case of filling the resin R, an air discharging nozzle for discharging the air of the inside is provided.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to fluid injection, and more particularly to a method of injecting multiple recesses.

[0002]

2. Description of the Related Art There are various cases in which it is necessary to inject a fluid into a large number of recesses, such as repairing cracks in a building and filling a crack in a refractory material in a furnace with a heat insulating material. The back side of concrete will be described. However, the method of the present invention itself is not limited to cracking concrete, repairing the back side, and the like.

The viaduct made of concrete is assembled into a formwork,
Concrete is filled there (casting) and solidified, and the concrete frame is paved with asphalt or a railroad track is laid. Therefore, after removing the formwork,
The back surface (the bottom portion visible when looking up from below) is exposed.

Cracks may form on the exposed back surface due to various causes (acid rain, etc.). actually,
That's the case for most of the buildings built over 30 years ago. When this gets worse, the concrete falls to some extent as a lump. Normally, it is possible to pass under the concrete bridge, and it is very dangerous if this happens.

Therefore, normally, the exposed part is regularly inspected, and if there is a crack, the part is filled with resin or the like to prevent the crack from further expanding and also to prevent the concrete from falling. There is.

The filling of the cracks with the resin or the like is usually a manual operation one by one, which is very troublesome. Therefore, a construction method in which a steel plate is applied so as to cover a large number of cracks, the periphery is hermetically sealed and a resin is filled therein, and when the space is full, the cracks are also automatically filled can be considered.

[0007]

However, the method of manually filling one by one is too time-consuming. In addition, if there are cracks, there are innumerable ones around them, so that the whole area will eventually be filled by hand. Further, since the crack has a small width and is deep, it cannot be manually filled deeply.

Further, in the method of abutting a steel plate or the like to fill the space, the volume of the space is large and the resin is wasted. Further, since the steel plate itself is heavy, a pillar for supporting the steel plate is required during construction, and the construction equipment must be large. Therefore, it was both troublesome and costly.

[0009]

In view of the above situation, the present inventor has completed the method of the present invention as a result of earnest research, and is characterized by the fact that a large number of recesses in the body are filled with fluid. Is a method of injecting a porous sheet-like body to cover the concave portion, a cover for preventing fluid leakage is provided on the porous sheet-like body, and a porous sheet-like body is formed from an injection port provided in a part of the cover. The point is to inject a fluid and allow the fluid filled in the porous sheet-like body to flow into the recess.

Here, the skeleton is a building in which a concave portion to be filled with a fluid is generated, and it may be any cement-based material such as concrete, a furnace or a heat insulating material, or an organic material such as plastic. Good. Further, the building is not limited to viaducts, but may be any structure such as walls, columns, ceilings, floors.

Here, a large number of concave portions mean a large number of small voids at random like cracks generated in concrete, but not only that, but also regular ones,
It may be a hole provided in advance. In short, it is a recess that needs to be filled.

The fluid is used to fill the concave portion and is usually a viscous resin, but it may be cement slurry or other solidifiable material. As the resin, any resin such as epoxy resin, acrylic resin, polyester resin, urethane resin, and phenol resin may be used, but it is preferable that the resin has good penetrability to the recess and good adhesiveness.

This is the point of the present invention, but the porous sheet-like body is a sheet-like body having continuous voids. An example is one that has the structure of a sheet-shaped loofah that wash the body. It may also be a continuous foam such as a sponge. What the inventors used for the experiment is a so-called three-dimensional fabric, which not only weaves in a plane with warp threads and wefts, but also connects upper and lower plane cloths with threads that should be called vertical threads. , To keep the thickness to some extent. Of course, this is commercially available and is available to anyone.

Any method may be used to fix the porous sheet-like body to the surface of the recess, as long as it does not prevent the fluid from entering the recess. Easy to glue with glue. It is desirable that the adhesive is applied to the body side so that the concave portion of the body is not sealed with the coating film. But,
As long as the porous sheet-like body itself is lightweight and the thin adhesive layer can be easily broken by the pressure of the fluid and the fluid can enter the concave portion, the coating film may be formed on the entire surface.

There is no problem with the porous sheet material as long as it has a shape-retaining property, but when it is flexible, it is impregnated with a resin after being attached and the skeleton (fiber etc.) thereof is cured. The shape retention property may be imparted. This is to facilitate the subsequent injection of resin.

The cover means that the porous sheet-shaped body is open to the surroundings, so that the fluid does not leak, that is, the fluid that has entered the porous sheet-shaped body is directed only to the concave portion to be filled. It must be open and sealed to the rest. The member for this sealing is the cover here. The cover may be of any kind, but is typically a plastic sheet. In order to withstand the load, those reinforced with carbon fiber or glass fiber are preferable.

Any method may be used to fix the cover to the porous sheet-like body, but the method of adhering is similar to the above.

The injection port is an opening for injecting (or press-fitting) a fluid into the porous sheet-shaped body. This opening preferably has a structure that can be sealed with a screw or a cap after the injection is completed.

Further, when the crack penetrates to the opposite side of the frame and the through hole is large, that portion may be sealed beforehand with a resin or the like. If it is a small through hole, there is resistance and it does not matter so much.
There is almost no such need.

Further, although the fluid passes through the porous sheet-like body and enters the recesses at various places, a groove may be provided on the surface of the body to facilitate the movement of the body in the surface direction.
The groove may be shallow, but it is preferable to provide it in a vertical and horizontal cross shape. This only needs to be cut with a grinder or the like.

Since the present invention is an injection method, any method may be used after injection curing. That is, the nozzle or cover may or may not be removed. Due to aesthetic issues, it may be removed and surface-finished. Further, the porous sheet-like body may be removed (which is difficult because it is integrated with the resin in the crack). Of course, you may leave it as it is.

[0022]

The present invention will be described in more detail with reference to the embodiments shown in the drawings. FIG. 1 is a partial cross-sectional view of a crack on the back surface of concrete being filled with resin by the method of the present invention. Aggregates 2 and cracks 3 are visible in the cross section of the concrete body 1. A porous sheet-like body 5 (here, a three-dimensional hollow structure glass fabric manufactured by Parabeam Co. (Netherlands) is used) is adhered to the back surface of the body 1 by an adhesive 4, and a cover 6 is adhered thereon. . Cover 6
An opening (injection port) is provided in a part of the nozzle, and the nozzle 7 is fitted therein so as to facilitate injection.

In this state, the resin R for filling from the nozzle 7
Inject. The resin R flows from the nozzle 7 to the porous sheet-like body 5
Filling the inside of the adhesive layer 4 (or the adhesive layer 4
Penetrates into crack 3). The shaded portion in the figure shows the resin R invading.

When the resin R is filled, the porous sheet-like bodies 5 at the left and right ends in FIG. 1 are sealed by an appropriate means. The cover 6 may also use the protrusion of the concrete skeleton itself.

Further, when filling, it is necessary to discharge the internal air, so a nozzle for bleeding air is provided. This may be the same as the injection nozzle 7 described above, and it is better to have a plurality of locations. If the resin is discharged from that portion instead of the air, it may be sealed with a cap or the like. It is not necessary to consider the air in the cracks as they are naturally discharged.

Furthermore, since the resin gradually hardens and shrinks,
In addition, since the narrow crack cannot be immediately filled, even if the injection slur 7 is filled with the resin, if the injection is stopped and sealed at that time, the filling may not be sufficient or the deepest portion of the crack may not be penetrated. Therefore, when the filling is completed and the resin overflows from the injection section, the pressure sealing device may be fixed to the injection section. This is one in which pressure is continuously applied for a long time by the force of a spring or the like, and a certain amount of resin is filled. For example, in the case where the resin is left for one day and night, the amount of resin invading and contracting during the time of one day and night is maintained and pressure is applied with a constant force. By doing so, the pressing is always continued, so that the deep portion of the crack can be filled and the cavity does not go out. After curing, it may be removed together with excess resin.

[0027]

The method of the present invention described in detail above has the following great effects. It is possible to easily fill a large number of recesses with fluid. It can be filled in every corner and reinforces the body. The construction period is very short, and the period of traffic interruption even on roads can be shortened. When performing construction from the back side, it is not necessary to construct on the top side, so it is possible to do without blocking traffic. Since the porous sheet-like material is used, it is easy to fill the fluid, and it is possible to quickly fill every corner, and it is difficult for air to form. A pump for filling fluid (even manually) is sufficient, and no special device or tool is required. When the adhered porous sheet-like material is left, it becomes a very strong reinforcing material itself.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a method of the present invention being carried out.

[Explanation of symbols]

 1 Concrete frame 2 Aggregate 3 Crack 4 Adhesive layer 5 Porous sheet-like body 6 Cover 7 Nozzle R Resin

Claims (2)

[Claims] 1. A method for injecting a fluid into a large number of recesses in a body, wherein a porous sheet-like body is attached so as to cover the recesses, and a cover for preventing leakage of the fluid is provided on the porous sheet-like body. A method for injecting a fluid, comprising injecting a fluid into a porous sheet-like body through an injection port provided in, and causing the fluid filled in the porous sheet-like body to flow into a recess. 2. The fluid injection method according to claim 1, wherein a groove for facilitating the surface movement of the fluid is provided on the surface of the skeleton before the porous sheet-like body is attached.