JP3604999B2 - Concrete repair panel - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a panel for repairing a concrete surface such as a tunnel.
[0002]
[Prior art]
In recent years, concrete casting is an indispensable technique in civil engineering work. For example, concrete is cast on the wall of a tunnel such as a railway or a highway. However, when the concrete is poured, the anchor to the ground is insufficient, or depending on the selection of the cement material, the concrete may be peeled or collapsed after the casting.
[0003]
For this reason, the degree of peeling of the concrete wall inside the tunnel is inspected visually or by hitting, etc., and if there is peeling or falling, a large amount of concrete is dropped around the site and new concrete is placed here. Means have been taken to prevent the exfoliation by casting, deeply driving the anchor toward the ground, or injecting an epoxy resin or the like.
[0004]
After such measures are taken, the concrete surface is covered with a metal plate, and in some cases, the fixed metal plate is removed and the inspection is performed to confirm the measures taken.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described conventional technology, and provides a panel for repairing a concrete surface such as a tunnel.
[0006]
[Means for Solving the Problems]
The gist of the present invention is a panel used in contact with a repair surface of concrete, wherein the panel is formed with a grid-like rib to form a see-through hole through which the concrete surface can be viewed, and the rib has a width dimension. The present invention relates to a concrete repair surface panel which is constituted by a main rib and a sub-rib, each of which has a large hole, and wherein a mounting hole is formed in the main rib.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention has the above-mentioned structure, and is used by being abutted and fixed to a concrete repair surface.This panel is abutted and fixed to the repaired concrete surface to prevent collapse of the concrete, and furthermore, the concrete is inserted through the see-through hole. It is characterized in that the repaired state of the surface can be visually checked, and the cross section of the rib constituting the see-through hole is usually trapezoidal in which the tip is thinner than the concrete surface side. Such a panel is preferably made of a thermosetting resin (FRP) mixed with glass fiber, preferably represented by unsaturated polyester resin or epoxy resin, or also made of a thermoplastic resin represented by PE or PP. Things.
[0008]
The fixing to the abutment on the concrete surface is performed by using a mounting hole provided in the main rib and using a means for driving and fixing an anchor. For example, a main rib forming a square lattice is one of the methods. It is good to form a plurality in the direction (vertical direction of the panel), and more preferably in the other direction (lateral direction of the panel). The main ribs have a larger width dimension than the sub-ribs, and have the same height or a higher height. The rib preferably has a trapezoidal shape whose tip is thinner than the concrete surface. The larger the size of the see-through hole is preferable because the concrete surface can be seen, but the size is appropriately selected in terms of strength. Also, the thinner the rib, the lighter the weight and the lower the cost of the product. The see-through hole is usually a square hole formed by lattice-shaped ribs, but is not limited to this, and may be, for example, a triangular or hexagonal hole.
[0009]
In order to manufacture the present invention, a mold that can be divided into upper and lower parts is used, and a resin is filled between the molds to manufacture a panel. For example, an FRP made of unsaturated polyester resin mixed with glass fiber is used. Further speaking about the FRP panel, the width of the main rib is 5 to 15 mm, and the pitch is 5 to 50 mm. The width dimension of the sub rib is 2 to 10 mm. The height of the rib is 10 to 20 mm. The overall dimensions of the panel are 300 to 500 mm in width and 500 to 2000 mm in length. Of course, the length and width of the panel can be freely changed.
[0010]
【Example】
Hereinafter, the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a front view showing a first example of the panel of the present invention, and FIG. 2 is an enlarged sectional view taken along line AA. In the drawing, reference numeral 1 denotes a panel for repairing concrete, which is made of FRP resin (resin in which glass fiber is mixed with unsaturated polyester resin). Reference numeral 2 denotes a rib extending in the vertical and horizontal directions, and a plurality of rectangular see-through holes 3 are formed by the rib. In this example, the rib 2 is composed of two main ribs 2a and sub-ribs 2b in the vertical direction.
[0011]
The rib 2 has a wide width on the back side of the panel 1, that is, a side in contact with the concrete surface, and a narrow width on the front side, and has a trapezoidal cross section. For this reason, the contact area of the rib 2 with the concrete surface is increased, and the concrete repair surface can be visually observed from the see-through hole 3 formed thereby. The trapezoidal (inclined) cross section of the rib 2 has a great merit that the mold 1 can be easily released from the mold when the panel 1 is manufactured. Reference numeral 4 denotes a mounting hole formed in the main rib 2a, which is fixed by driving an anchor 5 into concrete (ground).
[0012]
FIG. 3 is a view schematically showing a method of manufacturing the concrete repair surface panel. M1 has a convex portion a forming a see-through hole and grooves b1 and b2 forming a rib 2, which is a lower mold. It is a thing. The groove b1 forms the main rib 2a, and the groove b2 forms the sub-rib 2b. The former has a slightly wider width. In this example, the convex portion a has a trapezoidal cross section as a whole, and has a slightly inside angle θ. The upper mold M2 is disposed at a position slightly apart from the convex portion a of the lower mold M1, and a sheet molding compound C in which glass fiber is mixed with an unsaturated polyester resin is laminated in the meantime. -The panel substrate was molded under pressure.
[0013]
To further refer to a preferred example of the upper mold M2, the upper mold M2 is formed with a ridge c with respect to the groove b of the lower mold M1, so that the two molds M1 and M2 can be securely fitted. The amount of resin cut from the panel base is reduced, and the cut portion P is cut at a contact position (or a slightly deeper position) between the groove portion b and the ridge portion c, so that the resin portion cut is small. It also has the feature that cutting itself becomes easy.
[0014]
The resin filled in the cavity formed by the upper and lower molds is an unsaturated polyester resin composition (a glass fiber content of 25%) in which a hard type glass fiber having a cut length of 1 inch and a soft type glass fiber are used in combination. %) And pressurized and heated at 140 ° C., a pressure of 50 kgf / cm 2, and a holding time of 8 minutes to obtain a panel base.
[0015]
FIG. 4 is a sectional view similar to FIG. 2 showing a second example of the panel of the present invention. In this case, a step is formed in a mounting hole formed in the main rib 2a (4a), and the head of the anchor 5 is fitted into the hole.
[0016]
FIG. 5 is a cross-sectional view when the panel 1 is used. Reference numeral 11 denotes a concrete surface on which repair work has been performed, and reference numeral 12 denotes a ground. The anchor 5 is preferably driven so as to reach the ground 12 through the mounting hole 4. As can be seen from this figure, the concrete surface 11 repaired by the panel 1 is prevented from collapsing, and the concrete surface 11 can be seen through the see-through hole 3.
[0017]
FIG. 6 is a front view showing a third example of the square lattice-shaped panel of the present invention. The feature of this example is that two main ribs 2a are formed vertically and horizontally, and a mounting hole 4 is formed at an intersection 6 of the main ribs 2a.
[0018]
【The invention's effect】
As described above, the present invention is characterized in that concrete collapse is prevented, and the repaired concrete surface can be visually observed through the see-through hole of the panel. In particular, repair of concrete in a tunnel becomes extremely easy. Things.
[Brief description of the drawings]
FIG. 1 is a front view showing a first example of a panel of the present invention.
FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1;
FIG. 3 is a diagram schematically showing a panel manufacturing method.
FIG. 4 is a sectional view similar to FIG. 2, showing a second example of the panel of the present invention.
FIG. 5 is a cross-sectional view using a panel on a concrete surface.
FIG. 6 is a front view showing a third example of the panel of the present invention.
[Explanation of symbols]
1) Concrete repair panel,
2 ribs,
2a @ main rib,
2b @ sub rib,
3 ‥ Perspective hole,
4, 4a mounting holes,
5 ‥ anchor,
6 ‥ intersection of main ribs,
11 ‥ Concrete surface repaired,
12 ‥ Chiyama,
C ‥ resin,
M1 ‥ lower type,
M2 @ upper type,
P ‥ cut surface,
a ‥ trapezoidal convex,
b ‥ groove,
c ‥ ridge,
d ‥ pin.

Claims (7)

A panel used in contact with a repair surface of concrete, wherein the panel is formed with a grid-like rib and has a see-through hole through which a concrete surface can be visually observed, and the rib has a main rib and a sub-rib having a large width dimension. A panel for repairing concrete, characterized by having a mounting hole formed in a main rib. 2. The concrete repair surface panel according to claim 1, wherein the see-through hole is formed of a square grid-like rib, and a plurality of main ribs are formed in one direction in a square grid. 2. The concrete repair surface panel according to claim 1, wherein the see-through holes are formed of square grid-like ribs, and the main ribs are formed in a plurality of square grids in one direction and the other direction. The concrete repair surface panel according to claim 1, wherein the rib has a trapezoidal shape whose tip is narrower than the concrete surface side. 2. The concrete repair panel according to claim 1, wherein the panel is made of a thermosetting resin. The concrete repair panel according to claim 5, wherein the panel is made of FRP. 2. The concrete repair surface panel according to claim 1, wherein the panel is made of a thermoplastic resin.

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