JPS6299599A - Waterproof heat-insulating plate and antifreezing method of tunnel using said plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterproof heat insulating board used for preventing freezing of tunnels and a method of preventing freezing of tunnels using the same.

When constructing a tunnel, it is desirable that the completed tunnel not only be robust but also highly waterproof and cold resistant. The reason for this is that if the tunnel is not waterproof, water from the ground above the tunnel will seep and drip into the tunnel, and if it is not waterproof and cold resistant, water will seep into the tunnel in the winter, especially in cold regions. Not only does the water freeze and become icicles that hang down from the top of the tunnel, causing accidents, but the tunnel itself freezes and becomes distorted, and this distortion remains without being completely restored even after thawing. This is because there is a risk that it may become damaged over many years.

In view of the above-mentioned circumstances, the present invention has been made for the purpose of providing a waterproof insulation board for use in preventing freezing of tunnels and a construction method for preventing freezing of tunnels using the same.
The structure of the waterproof heat insulating board consists of a flat rectangular closed foam body having appropriate elasticity.

A water-stopping layer made of a synthetic resin film, etc. is attached to the back side of a heat-insulating layer that has a protective layer made of an inorganic material such as glass fiber or asbestos integrally provided on the surface, and a water-permeable layer is provided on the back side of the water-stopping layer. An engaging part for joining is formed on one set of opposing sides of the main body formed by the above method, and a sheet for joining is provided on the protective layer or water stop layer on the other set of opposing sides. This is a feature of the freeze prevention method, and the anti-freezing method is applied to the primary lining or secondary lining of the tunnel to be insulated.

Consists of a planar rectangular closed foam with appropriate elasticity,
A water-stopping layer made of a synthetic resin film, etc. is attached to the back side of a heat-insulating layer that has a protective layer made of an inorganic material such as glass fiber or asbestos integrally provided on the surface, and a water-permeable layer is provided on the back side of the water-stopping layer. Waterproof insulation comprising a main body formed by forming an engaging part for joining on one set of opposing sides, and providing a joining sheet on the protective layer or water-stop layer on the other set of opposing sides. Stepped mounting holes are transparently provided at appropriate locations on the plate, and a mounting member having a cup shape and a locking collar formed on the upper edge that fits into the step is inserted into the hole. Fit the waterproof heat insulating board into the hole, apply the joining sheet in the arched direction of the tunnel, apply the water permeable layer to the ceiling of the surface of the tunnel that is to be prevented from freezing, and remove the bottom of the attachment member. Then, drive fixing members such as anchor bolts into the surface and attach them to the cover. 1. Next, apply the joining sheets on both sides of the waterproof insulation board to the tunnel wall surface, and place other waterproof insulation boards on top of them. The sheets are bent or cut and arranged on the tunnel wall side, and the sheets are pasted and joined to the tunnel wall in the same manner as described above, thereby pasting the waterproof insulation board in an arch shape around the tunnel's inner periphery. On the other hand, it is characterized by sequentially engaging the corresponding engaging portion of another waterproof insulating board with the engaging portion of the waterproof insulating board in a watertight manner and adhering it to the surface of the tunnel in the same manner as described above. It is.

Next, embodiments of the present invention will be described with reference to the drawings.

A is a waterproof heat insulating board as an example of the present invention, in which glass fiber, asbestos, etc. A protective layer 2 made of an inorganic material is laminated and fixed, while a water-stopping layer 3 made of a synthetic resin film or the like is laminated and fixed on the back side of the heat-insulating layer 1, and a water-stopping layer 3 made of elongated closed-cell foam or non-woven fabric or the like is formed on the back side of the water-stopping layer 3. The main body is constructed by attaching the bottom plates 4 consisting of the base plates 4 at appropriate intervals so that gaps 5 for water passage are formed between them,
Engaging parts 6 and 7 are provided on one side parallel to the gap 5 from the front side and the other side from the back side, and bonding sheets 8 and 9 are provided on the protective layer 2 on both sides perpendicular to the gap 5. It is pasted so that it sticks out.

Note that the joining sheets 8 and 9 may be provided continuously to the water stop layer 3.

An example of antifreezing work for the tunnel t using the waterproof heat insulating board A configured as described above will be described as follows.

First, an appropriate number of attachment holes 11 formed in the waterproof pan holder 10 are formed in the waterproof heat insulating board A with steps and the stepped portions are shaped to fit waterproof clothing, which will be described later. Apply one water-permeable layer to the ceiling of the surface of the tunnel t that is to be prevented from freezing, with the joining sheets 8 and 9 facing the arched direction of the tunnel t, and lock it on the upper periphery of the waterproof tray holder 10. A shallow cup-shaped waterproof garment 13 provided with a flange 12 was fitted, a caulking material 14 made of butyl rubber, etc. and a flat washer 15 were put in the bottom of the waterproof garment 13, and an anchor member 16 was screwed to the tip. Anchor bolt 17 with washer 15. Waterproof clothing 13. Attachment hole 1
1 into the hole 18 provided in the tunnel t, rotate the anchor bolt 17, and insert the anchor member 16 into the hole 18.
The waterproof heat insulating board A is attached to the tunnel t by pressing the water insulating board A to the tunnel t by performing pressure contact on each several floor hole 11.
Apply the joining sheets 8 and 9 on both sides of the tunnel t to the wall surface of the tunnel t, and place another waterproof heat insulating board on top of them by bending the joining sheet toward the tunnel wall surface. The work of adhering and bonding is carried out sequentially to adhere the inner circumference of the tunnel in an arch shape, while attaching the engaging portion 7 of another waterproof insulating board to the engaging portion 6 of the lower waterproof insulating board A that has been pasted. Interpose a caulking material between them to engage and connect them in a watertight manner, and if necessary, firmly fix the joints of the drawing boards with staples, and then sequentially join and fix the required amount of waterproof insulation boards in the upper and lateral directions. This is to complete the antifreeze work.

As mentioned above, even if water leaks from the upper wall of a tunnel constructed to prevent freezing using the waterproof and heat insulating board A of the present invention, the water flows down through the passageway formed by the void 5 and is discharged to the outside. Therefore, there is no risk of water leaking inside the tunnel, and even if cold wind blows through the tunnel during the winter, the cold air is protected by the protective layer 2. Water is blocked by the heat insulating layer 1 and is not transmitted to the tunnel wall, so there is no risk of the tunnel freezing.6However, since the joints of each waterproof heat insulating board are sealed watertight, there is no risk of water leaking from those joints. Not at all.

In addition, when actually performing antifreeze work on a tunnel, the waterproof insulation boards located at both ends of the tunnel in the length direction should have a protective layer on the side without an engaging part on the side that corresponds to the outside. In addition, the bonding sheet below the waterproof and heat insulating board located at the lowest position in the inner peripheral direction of the tunnel, that is, in the arched direction, is not provided with this, but a protective layer is provided in advance on the lower side as necessary.

The above has described the waterproof heat insulating board A in which the bonding sheets 8 and 9 are pasted on the protective layer 2, but next, the bonding sheets 8' and 9' are connected to the impermeable layer, that is, the water stop layer 3. The installed waterproof and heat insulating board A' will be explained.

Figure 5 is a front view of the waterproof heat insulating board A', and the joining sheet 8'
, 9' are connected to the water stop layer 3 as shown in Fig. 6, and an example of antifreezing construction of the tunnel t using this waterproof insulation board A' is as follows. It is.

In FIGS. 5 and 6, the same reference numerals as in FIGS. 1 to 4 indicate the same parts.

First, attach the waterproof heat insulating board A''2, the joining sheet 9' is bent toward the wall surface at the end of the tunnel, placed on the joining sheet 8'', and pasted on the wall surface of the tunnel t. Place sheet 9' against the tunnel wall and place another waterproof insulation board A' on top of it.
3, the joining sheet 8' is bent toward the wall of the tunnel t, placed on the joining sheet 9', and pasted to the wall of the tunnel t. A waterproof heat insulating board A' is pasted, and the engaging part 6 of another waterproof heat insulating board A' is watertightly engaged with the engaging part 7 of the pasted waterproof heat insulating board A', and the tunnel is closed in the same manner as above. Waterproof and heat insulating plates A' are sequentially pasted in an arch shape on required surfaces of the inner periphery, and the effect is the same as when the above-mentioned bonding sheet is provided on the protective plate.

In addition, in the above, the case where the joining sheet of the waterproof heat insulating board A' to be joined to the waterproof heat insulating board A' attached to the wall surface of the tunnel t is bent is described, but this joining sheet is not cut. It's okay.

Since the present invention is as described above, it is extremely useful for preventing freezing of tunnels.

[Brief explanation of drawings]

Figure 1 is a front view of an example of the waterproof insulation board of the present invention, Figures 2 and 3 are enlarged cross-sectional views of the joint, and Figure 4 shows the use of anchor bolts when attaching the waterproof insulation board to the tunnel wall. FIG. 5 is a separate front view of the waterproof and heat insulating board of the present invention, and FIG. 6 is an enlarged sectional view of the joint portion thereof. A, A'...waterproof insulation board, t...tunnel, 1...
・Heat insulation layer, 1a, 1b, 1c, 1
d"' Closed foam, 2...Protective layer, 3...Water stop layer, 4...Bottom plate, 5...Gap that becomes water passage, 6,7.
...Engagement part, 8, 9...Joining sheet, 10...Waterproof tray holder, 11...Multiple floor hole, 12...Locking collar, 1
3...Waterproof clothing, 14...Caulking material, 16...
Anchor part, 17... Anchor bolt. 18... Hole made in the tunnel

Claims (1)

[Scope of Claims] 1. A synthetic resin film or the like is formed on the back side of the internal layer, which is made of a planar rectangular closed foam having appropriate elasticity and has a protective layer made of an inorganic material such as glass fiber or asbestos integrally provided on the surface. A water-stopping layer consisting of is pasted, and a water-permeable layer is provided on the back side of the water-stopping layer.An engaging portion for joining is formed on one pair of opposing sides of the main body, and an engaging portion for joining is formed on the opposite side of the main body. A waterproof heat insulating board characterized in that a bonding sheet is provided on a protective layer or a water-stop layer on opposing sides. 2. The parts of the primary lining or secondary lining of the tunnel that are to be waterproofed and insulated are made of a planar rectangular closed foam with appropriate elasticity, and a protective layer made of inorganic material such as glass fiber or asbestos is integrated on the surface. A water-stopping layer made of a synthetic resin film or the like is pasted on the back side of the heat-insulating layer provided on the main body, and a water-permeable layer is provided on the backside of the water-stopping layer. Stepped mounting holes are transparently formed at appropriate locations on a waterproof heat insulating board that forms an engaging part and is formed by providing a joining sheet on the protective layer or water stop layer on the other pair of opposing sides, A mounting member having a cup shape and a locking flange formed on the upper edge that fits into the stepped portion is fitted into the mounting hole, and the waterproof heat insulating board is tunneled through the joining sheet. Apply the water-permeable layer in the arched direction to the ceiling of the surface of the tunnel that should be protected from freezing.
A fixing member such as an anchor bolt is driven into the surface from the bottom plate of the attachment member and attached to the surface, and then the joining sheets on both sides of the waterproof insulation board are applied to the tunnel wall surface, and other parts are placed on top of them. The waterproof heat insulating board is placed on the tunnel wall by bending or cutting the bonding sheet, and is adhered and bonded to the tunnel wall in the same manner as described above, thereby creating an arched shape around the inner circumference of the tunnel. At the same time, the corresponding engaging part of another waterproof heat insulating board is watertightly engaged with the engaging part of the waterproof heat insulating board, and the work is also carried out to affix it to the surface of the tunnel in the same manner as above. A method for preventing freezing of tunnels, which is carried out sequentially.