JPH06248881A - Interior panel for tunnel and attaching method therefor - Google Patents

Abstract

PURPOSE:To improve construction efficiency and strength by attaching flexible panels prepared by applying fluororesin coating to a fiberglass reinforced concrete board to the curved wall surface of a tunnel at desired intervals by means of anchor bolts. CONSTITUTION:Anchor bolts each are secured to the inner wall of a tunnel T through a sleeve 6. Next, an interior panel P is held and fixed between a nut 8 screwed onto the thread portion 7a of the anchor bolt and a box nut 9, and a desired spacing K is maintained between the wall surface of the tunnel T and the panel P. And a base board of the panel P comprises fiberglass reinforced concrete, and hence the panel has high flexibility and can be easily bent along the curvature R of the tunnel T by the use of hands at a construction site. As a result, the panel can be attached easily and firmly and can be transported easily because of its light weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interior panel for a tunnel used for the interior of a tunnel and a mounting method thereof.

[0002]

2. Description of the Related Art Recently, there is an increasing demand for covering the wall surface of a tunnel with an interior panel in order to safely drive the vehicle in a tunnel. The interior of the wall of the tunnel is generally (1) improving the lighting efficiency by reflecting the light in the tunnel evenly.
(2) To make it easier for the driver to visually recognize the position of the wall surface of the tunnel and to guide traffic safely. (3) To make the unevenness of the wall surface of the tunnel even so that the driver does not feel uncomfortable. Other requests include (4) minimizing the exposure of wiring and piping, and (5) adjusting the unevenness of the lining surface.

The interior has a great meaning as an element for preventing unnecessary visual stimulation to the driver, facilitating early detection and stable tracking of obstacles, and ensuring safe driving. There is an increasing demand for these things on highways that are driven at high speed for a long time.

By the way, as an interior panel for covering the inside of a tunnel, conventionally, an inorganic coated hard silica plate formed by coating a ceramic inorganic coating as a coating film on a substrate of calcium silicate, or a tile as a mounting material on a cemented substrate. Examples thereof include a tile panel, a enamel steel plate composite plate using a steel plate as a substrate, a decorative aluminum composite plate using an aluminum plate as a substrate, and a stainless steel plate resin coated plate using stainless steel as a substrate.

[0005]

However, the above-mentioned conventional inorganic coated hard-calcin board interior panel lacks the strength of the board itself, and when mounting the interior panel in the tunnel, a reinforcing member is placed over the back surface of the board to form a board. It was necessary to reinforce, and it was not possible to install it directly on the wall surface in the tunnel. Therefore, it takes a lot of time and labor to mount and install the interior panel in the tunnel, resulting in a high cost. Moreover, since the reinforcing member is required and the thickness of the panel is increased, it is impossible to minimize the gap between the wall surface of the tunnel and the reinforcing member, and the effective width of the entire tunnel is narrowed.

In addition, since the flexibility of the tile panel and the like is lacking as compared with that of the inorganic coating hard silica plate and the decorative aluminum composite plate, the interior panel for one sheet along the curvature of the wall surface in the tunnel allows a large area to be covered at a time. It was not suitable for installation and installation, and it took a lot of time and effort for the installation work.

Further, since the interior panel of the inorganic coated hard silica sheet has low impact resistance, when the vehicle or the like comes into contact with it, or stones or the like come into contact with the vehicle, the substrate is easily broken, and debris scatters in the surroundings. There were times when it caused trouble.

Further, the tile panel is heavy, and it takes a lot of labor to carry and handle it. Furthermore, the conventional stainless steel plate resin coated plate can easily perform graffiti, is easily stained with oil, and cannot be easily removed.

Therefore, the present invention is highly flexible and has a large bending fracture load, so that it is suitable for mounting a large area at a time along the curvature of the wall surface in the tunnel, and the mounting work is also labor-intensive. The purpose of the present invention is to make it easy and surely possible, to have a strong structure, to have high strength and to prevent breakage, and to make it light and easy to carry and handle.

[0010]

In order to solve the above problems, the present invention is to form a glass fiber reinforced concrete substrate and a coating layer made of a fluorine-based resin paint formed on at least the surface of the substrate. Adopted means.

In the present invention, an interior panel in which a coating layer made of a fluorine-based resin coating is formed on the surface of a glass fiber reinforced concrete substrate is provided with anchor bolts at desired intervals with respect to the wall surface in the tunnel. The means of mounting is adopted.

[0012]

[Function] Since the substrate of the interior panel is made of glass fiber reinforced concrete and is highly flexible and has a large bending fracture load, it can be installed and installed on a large area at a time along the curvature of the wall surface in the tunnel. It is suitable and can be easily and surely done without any troublesome installation work. In addition, the structure is robust, the strength is high, it is not easily destroyed, and it is lightweight and easy to carry and handle.

[0013]

1 to 5, P is an interior panel of the present embodiment, and the interior panel P is a substrate 1 and a first coating film made of a fluorine-based resin paint applied to the surface of the substrate 1. The layer 2 and a second coating layer 3 made of a fluorine-based resin coating material applied to the surface of the coating layer 2 form a three-layer structure.

The substrate 1 is made of glass fiber G as a reinforcing material.
Fiberglass reinforced concrete (GRC) in which cement mortar consisting of cement and sand as a binder is kneaded
As shown in FIG. 5, the front surface is formed into a substantially rectangular shape or a square shape, and several mounting holes 1a are provided in the outer edge portion of the substrate 1. As for the size of the interior panel P shown in FIGS. 1 and 5, for example, the length L is 1000 to 1200 mm, the width L'is about 1000 mm, and the thickness t is about 6 mm.

In order to form the substrate 1, cement mortar composed of cement and sand as a binder and glass fiber G as a reinforcing material are pneumatically pressured from nozzles of individual guns not shown in the figure. The sheet is sprayed on the surface, laminated to a predetermined thickness, and compacted with a roller or the like to form a sheet in which the glass fibers G are uniformly dispersed. Thereafter, the sheet is cut into desired dimensions to form the substrate 1.

The glass fiber G has a fiber length of, for example, 20 to 40 mm, and is most preferably 37 m.
The thickness of the fiber is, for example, 1
It is about 1.5 to 15.5 μm.

Cement mortar and glass fiber G
The compositional ratio of and is, for example, 98: 2 to 9 as a weight compositional ratio.
A ratio of 3: 7 is used, and in the case of this embodiment 95:
Use a ratio of 5.

To form the first coating layer 2 on the surface of the substrate 1, for example, a fluorine resin paint is used. As the fluorine resin paint, for example, the main component has a viscosity of 70 to
It has a high specific gravity of 80 (KU), good ductility and malleability, and a specific gravity of about 0.87 mixed with a curing agent is used. Its hue gives the driver an unpleasant feeling. For example, white, yellow, ivory, etc. are used in order to be able to drive refreshingly, to improve the surface reflectance with respect to the lighting, headlights, etc. in the tunnel T, to improve the brightness characteristics, and to facilitate visual recognition. .

To coat the coating layer 2 on the surface of the glass fiber reinforced concrete substrate 1, the substrate 1 and the coating layer 2 are used.
Perform the following preparatory work to improve the adhesion and intimacy with. First, a powdered material, salt, fats and oils, water, and other dusts and foreign substances adhering to the surface of the substrate 1 are removed by a polishing tool such as a sanding paper or a waste cloth to be applied on the substrate 1. Improves adhesion with the coating layer 2. Then, a synthetic resin primer is applied to further improve the adhesion between the substrate 1 and the coating layer 2. At this time, the synthetic resin used is as similar as possible to the synthetic resin used for the coating layer 2 in order to improve the closeness and adhesion between the substrate 1 and the coating layer 2. After that, using a tool such as a trowel or a spatula, putty material is applied to the rough surface formed on the surface of the substrate 1 to make the surface smooth, and then the entire surface of the substrate 1 is polished to be smooth. After performing the preliminary work described above, the fluorine-based resin coating material as the first coating layer 2 is applied to a thickness of, for example, about 40 μm.

Further, the main component of the second coating layer 3 applied to the surface of the first coating layer 2 is, for example, the first coating layer.
The upper surface of the first coating layer 2 is a fluorine-based resin having a viscosity of 50 to 75 (KU), which is slightly lower than that of the main agent of the coating layer 2 and has a specific gravity of about 1.25. For example, it is coated with a film thickness of about 10 μm. This second coating layer 2
If the graffiti is drawn on the surface due to its high hardness and low friction coefficient, it can be removed by wiping off the graffiti and oil system stains.
It has weather resistance and chemical resistance to dilute sulfuric acid, dilute nitric acid, etc.

Reference numeral 4 denotes a wall surface in the tunnel T to which the interior panel P is attached, and this wall surface 4 is formed by excavating with a desired curvature R according to the situation at the site.

Reference numeral 5 designates the interior panel P as a wall surface 4 in the tunnel T.
Anchor bolt for use in mounting on a sleeve 6. The anchor bolt 5 includes, for example, a sleeve 6 having an anchor portion 6a, and a bolt portion 7 screwed into the sleeve 6.
And a nut member 8 that holds a distance K between the wall surface 4 and the mounting position of the interior panel P by being screwed into the screw member 7a of the bolt unit 7, and the screw member 7 in cooperation with the nut member 8.
It is formed from a cap nut material 9 that is screwed into a and is used to tighten and fix the interior panel P.

Interior panel P formed as described above
In order to mount the same on the wall surface 4 in the tunnel T having a desired curvature R, first, a plurality of mounting holes 1'a are drilled on the wall surface 4 of the tunnel T by using a punching tool such as a drill. After that, the sleeve 6 is driven into each of the holes 1'a using a hammering tool, and the nut member 8 is attached to the screw portion 7a.
The bolts 7 that are screwed together are screwed into the respective sleeves 6. Then, by inserting the screw portion 7a of the bolt portion 7 into the several mounting holes 1a of the interior panel P, the nut material 8 screwed into the screw portion 7a of the bolt portion 7 and the screw portion 7a are screwed. Interior panel P with mating nut material 9
Anchor while tightening and fixing from the front and rear
The interior panel P is attached to the wall surface 4 using the bolt 5 while maintaining a desired distance K from the wall surface 4 of the tunnel T.
The distance K between the wall surface 4 of the tunnel and the interior panel P is preferably about 10 to 20 mm, for example.

At this time, since the substrate 1 of the interior panel P is made of glass fiber reinforced concrete in which reinforcing fibers such as glass fibers G are put and cemented in cement mortar made of cement and sand, it is flexible. Abundant and large bending fracture load. Therefore, it is possible to easily bend the interior panel P along the desired curvature R of the wall surface 4 in the tunnel T using a hand at the construction site.

As a result, for example, the length L is 1000 to
An interior panel P having a size of 1200 mm, a width L ′ of about 1000 mm, and a thickness t of about 6 mm has a weight of, for example, about 15.5 kg or 1 m.
^It is 12.9 kg / m ² per ² and is lightweight. Therefore, it is easy to transport and handle, and cutting can be done easily at the installation site.
The bolt 5 can be used to quickly and surely attach to the wall surface 4 in the tunnel T.

Therefore, the interior panel P is successively arranged along the desired curvature R of the wall surface 4 in the tunnel T to the minimum required, for example, 1
Since the anchor bolts 5 can be used for direct attachment and construction while securing a desired distance K of about 0 to 20 mm, no special reinforcement member needs to be attached to the back surface of the interior panel P for reinforcement. The effective width of the entire tunnel T is not narrowed more than necessary, and the space is effectively used (see FIGS. 2, 3, and 4).

Then, an interior panel P made of the glass fiber reinforced concrete substrate 1 of this embodiment, a conventional inorganic coated hard silica sheet made of a ceramic inorganic coating as a coating film on a calcium silicate substrate, or cement. Tile panels with tiles attached to the substrate as surface material, enamel steel plate composite plates using steel plates as substrates, decorative aluminum composite plates using aluminum plates as substrates, stainless steel plate resin coated plates using stainless steel as substrates, etc. Physical properties of, for example, initial reflectance visual appearance (%), coating film hardness (Mohs hardness), weight (kg / m ² ), bending fracture load (kgf), deflection (mm), impact resistance (g), Water absorption (%), water content (%), fire resistance, weather resistance, and further 5w
Table 1 below summarizes the test results of chemical resistance to dilute sulfuric acid having a concentration of t% and dilute nitric acid having a concentration of 5 wt%.

[0028]

[Table 1]

According to Table 1 above, the interior panel P thus formed has a bending fracture load of about 50 (kgf) for the inorganic coated hard silica sheet, and has an impact resistance of 530 (for a sample having a length of 70 cm). On the other hand, in the interior panel P of this embodiment in which the substrate 1 is formed of concrete containing glass fiber G, the bending fracture load is 6
It is 0 (kgf), and the impact resistance for a sample having a length of 70 cm is 600 g. Therefore, it is not necessary to provide a special reinforcing material on the back surface of the interior panel P to reinforce the interior panel P, and the interior panel P can be flexed according to a desired curvature R in the tunnel T in a state where the labor is saved. The interior panel P can be directly attached to the wall surface 4 by using several anchor bolts 5. Moreover, even after the mounting, the interior panel P can be mounted with a strong structure without lowering its strength (see FIGS. 2, 3, and 4). Therefore, a vehicle or the like may come into contact with the interior panel P, or a stone or the like may be attached to the interior panel P
When the vehicle comes in, the interior panel P is less likely to be destroyed and the fragments are not scattered around, so that no traffic obstacle is caused in the tunnel T.

The first coating layer 2 formed on the surface of the substrate 1 of the interior panel P has, for example, a viscosity of 70 to 80 (KU).
Fluorine-based resin coatings are used, which are high in ductility and malleability and are easy to apply. Powdered substances, salts, oils, moisture, and other dust and foreign matter adhering to the surface of the substrate 1 are sanded. , Applying a primer with a good adhesion to the substrate 1 by removing it with a polishing tool such as a waste cloth, applying putty to the rough surface of the substrate 1 to make it smooth, or performing smooth polishing. Since the first coating layer 2 is coated on the surface of the substrate 1 by adjusting the substrate such as adjustment, the closeness and adhesion of the first coating layer 2 of the fluorine-based resin to the substrate 1 are good. Therefore, when the substrate 1 is flexed along the curvature R of the tunnel T, the first coating layer 2 formed on the surface of the substrate 1 with a fluorine-based resin to have a film thickness of, for example, about 40 μ causes cracks. No peeling, cracking or chipping.

On the surface of the first coating layer 2 coated on the substrate 1 in which the cement mortar is mixed with the inorganic reinforcing fiber of the glass fiber G as a reinforcing material, the same type as the first coating layer 2, The second coating layer 3 made of a fluorine-based resin of the same quality and having intimacy and adhesion is coated with a film thickness of, for example, about 10 μ to protect the first coating layer 2.

From the above Table 1, the visual appearance of the reflectance of the coating layer 3 is about 70% as compared with about 80% for the conventional inorganic coated hard silica sheet, and the illumination inside the tunnel T is small. Are evenly reflected, and the lighting efficiency is improved. Moreover, by mounting the interior panel P on the wall surface 4 in the tunnel T, the brightness contrast during traveling of the vehicle is ensured with respect to other wall surfaces such as the road paving surface and the ceiling surface in the tunnel T, for example, of the own vehicle. The traveling position can be easily and surely recognized with respect to the preceding vehicle, and the sense of distance can be easily grasped, which contributes to safe driving.

Since the first coating layer 2 is protected by the second coating layer 3 made of Teflon resin coating as described above, the temperature resistance characteristic from high temperature to low temperature is improved. Further, since the substrate 1 is nonflammable and combustion gas is not generated, it is safe even if a fire should occur in the tunnel T.

Moreover, the substrate 1 has a fiber length of, for example, 3
A first coating layer 2 formed on the surface of the substrate 1 by mixing glass fiber as an inorganic reinforcing fiber having a fiber diameter of approximately 7 mm and a fiber diameter of approximately 11.5 to 15.5 μm into cement mortar composed of cement and sand. Also, since the second coating layer 3 is also coated with the resin coating material having high chemical resistance of the fluorine-based resin, rust does not occur on the substrate 1, the coating layer 2, and the coating layer 3. Further, since two coating layers 2 and 3 made of a Teflon-based resin coating are formed on the substrate 1, water repellency is exhibited, the water absorption rate and water content are low, and the humidity in the tunnel is low. It can sufficiently withstand the seepage of groundwater and groundwater.

From Table 1 a conventional inorganic coated hard silica plate, the substrate of which is made of hard calcium silicate,
And the water absorption rate and water retention rate of the conventional cement substrate tile panel using the cement substrate are 2 respectively.
In contrast, the interior panel P of the present embodiment has a water absorption rate of 15 or less and a water retention rate of 7 or less, which are both low, so that the humidity in the tunnel T and the groundwater stain Good for getting out.

Further, as described above, the second coating film layer 3 made of a fluorine-based resin is formed on the upper surface of the first coating film layer 2 made of a fluorine-based resin to be applied on the surface of the substrate 1 to form a lower layer. The coating layer 2 is protected. The coating hardness of the second coating layer 3 is Mohs hardness shown in Tables 1 to 3 and is high, and the friction coefficient is small, so that scratches are hard to occur. Therefore, when graffiti or oil stains are attached to the second coating layer 3 made of a fluorine-based resin, the graffiti or the like can be easily and surely removed just by wiping. Moreover, unlike the conventional paint, it is not necessary to wipe off the dirt by using an organic solvent such as thinner, and at this time, the labor of ventilating the inside of the tunnel T can be omitted.

In the above-mentioned embodiment, the first coating layer 2 and the second coating layer 3 made of the fluorine resin coating are formed on the upper surface of the substrate 1.
The coating layers 2 and 3 formed on the substrate 1 may be formed on the entire surface of the substrate 1, or may be formed on the substrate 1 as one layer. It may be formed only in a limited manner, and the film thickness thereof is not limited to the one shown in the above embodiment.

[0038]

As described above, the present invention is highly flexible,
Since the bending breaking load is also large, it is suitable for mounting a large area by the interior panel at once along the curvature of the wall surface in the tunnel, and the mounting work is easy and reliable without any trouble. In addition, the interior panel has a strong structure and high strength, is not easily broken, and is lightweight and easy to carry and handle.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which an interior panel is mounted along a wall surface in the tunnel as well.

FIG. 3 is a sectional view showing a mounting state of the interior panel of the same.

FIG. 4 is also a front view illustratively showing a state in which the interior panel of the present embodiment is mounted in the tunnel.

FIG. 5 is a partially cutaway front view showing an example of the interior panel of the present embodiment.

[Explanation of symbols]

 1 Substrate 1a Attachment Hole 2 First Coating Layer 3 Second Coating Layer 4 Wall 5 Anchor Bolt G Glass Fiber T Tunnel

Claims (2)

[Claims] 1. A substrate of glass fiber reinforced concrete,
An interior panel for a tunnel, comprising a coating film layer made of a fluorine-based resin paint formed on at least the surface of the substrate. 2. An interior panel in which a coating layer made of a fluorine-based resin coating is formed on the surface of a glass fiber reinforced concrete substrate is attached to a wall surface in a tunnel with anchor bolts at desired intervals. How to install the interior panel for the tunnel.