JP4388673B2 - Thermal insulation waterproof board for tunnel and its mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat insulating waterproof plate for a tunnel and a mounting structure thereof for covering an inner wall surface of a tunnel to block communication with outside air and draining water leaked from the inner wall surface of the tunnel without freezing.
[0002]
[Prior art]
Conventionally, this type of heat-insulating waterproof board and its mounting structure have been disclosed in, for example, Japanese Patent Publication No. Sho 50-21764, Japanese Patent Laid-Open Publication No. Sho 52-95841, etc. The one shown in FIG. 11 was proposed (see Japanese Utility Model Publication No. 57-56900).
[0003]
That is, the tunnel heat insulating waterproof plate (hereinafter, simply referred to as a heat insulating waterproof plate) 110 shown in FIG. 7 is mainly formed by adhering a synthetic resin waterproof layer 112 to the back surface of the foamed synthetic resin heat insulating layer 111. A cushion 113 (see FIG. 9) made of foamed synthetic resin is adhered to the back surface of the waterproof layer 112. Further, the attachment hole 111a provided in the central portion of the heat insulating layer 111 and the joint edge 112a of the waterproof layer 112 extending outward from the heat insulating layer 111 are fastened with an anchor bolt 120 and a nut 120a (see FIG. 9). It is a place.
[0004]
Such a conventional heat insulating waterproof board 110 is stretched around the inner wall surface 1 of the tunnel by the following mounting structure. 9 and 10, first, a plurality of heat-insulating waterproof plates 110 are disposed on the inner wall surface 1 of the tunnel while overlapping the joint edges 112a with each other, and are attached to the mounting holes 111a and the joint edges 112a of each heat-insulating waterproof plate 110. Anchor bolts 120 are driven, and nuts 120a screwed to the anchor bolts 120 are tightened to fix the heat insulating waterproof plates 110 to the inner wall surface 1 of the tunnel.
[0005]
Next, the upper part of the nut 120a fastened to each anchor bolt 120 is sealed with a sealing material 130, the foam cap 114 shown in FIG. 8A is installed in the mounting hole 111a, and the heat insulating layers 111 of the heat insulating waterproof plates 110 are mutually connected. Joint joints 115 shown in FIG. 8B are fitted and bonded in joint grooves 110a that are formed between them and intersect in the vertical and horizontal directions.
[0006]
Then, as shown in FIG. 11, the lower end E of each heat-insulating waterproof board 110 in the lowermost row is embedded at a depth H equal to or greater than the freezing depth under the roadbed. Finally, when the surfaces of the foam cap 114 and the joint foam 115 are sealed with urethane 140 or the like, the fire protection paint 150 mainly composed of inorganic substances such as shirasu balloons is formed on the entire surface of the foam cap 114 and the joint foam 115 (see FIG. 9). Apply.
[0007]
According to such a heat-insulating waterproof board 110 and its mounting structure, each of the heat-insulating waterproof boards 110 secures a gap for water passage between the waterproof layer 112 and the inner wall surface 1 of the tunnel with the cushion 113. The wall surface 1 is covered in an airtight and watertight manner. Therefore, the inner wall surface 1 of the tunnel can be heated by geothermal heat, and the water leaked from the inner wall surface 1 of the tunnel can flow down along the waterproof layer 112 without being frozen and drained under the road floor.
[0008]
[Problems to be solved by the invention]
As described above, each of the heat insulating waterproof plates 110 is fixed to the inner wall surface 1 of the tunnel by joining the waterproof edge 112 of the waterproof layer 112 and the portion of the waterproof layer 112 exposed at the bottom of the mounting hole 111a opened in the heat insulating layer 111. This is done by tightening with a nut 120a screwed to the anchor bolt 120. However, since the inner wall surface 1 of the tunnel is uneven, the waterproof layer 112 is not always parallel to the inner wall surface 1 but is often installed in an inclined state. Further, since the cushion 113 is adhered to the bottom of the joint edge 112a and the mounting hole 111a, even the skilled person does not always have a constant tightening torque.
[0009]
Specifically, the anchor bolt 120 can be established at a substantially right angle with respect to the inner wall surface 1 of the tunnel, but the waterproof layer 112 (joining edge 112a) of the heat insulating waterproof plate 110 is parallel to the inner wall surface 1 of the tunnel. Instead, it may be disposed in a state of being inclined to some extent. As a result, the lower surface of the washer or nut 120a is not in close contact with the upper surface of the waterproof layer 112, and the tightening force of the nut 120a does not act evenly on the entire peripheral edge of the mounting hole of the waterproof layer 112. Further, since the cushion 113 was only intended to form a gap for water passage between the inner wall surface 1 of the tunnel, its compression hardness is as soft as about 0.39 kg / cm ^{2 according} to JIS K 6767. won.
[0010]
Therefore, in many cases, the nut 120a is tightened until the washer or the lower surface of the nut 120a is in close contact with the upper surface of the waterproof layer 112. If the nut 120a is tightened too much in this way, the nut is shown in FIG. As described above, when the tightening force is concentrated on one portion of the joint edge 112a, the compression hardness of the cushion 113 is small and the joint edge 112a of the waterproof layer 112 is locally deformed. . And when such a state continued over the years, there existed a problem that the joining edge 112a of the waterproof layer 112 will be damaged gradually.
[0011]
And the damage in the fastening location of the waterproof layer 112 by such an anchor bolt 120 and the nut 120a results in peeling of the heat insulation waterproof board 110 from the inner wall surface 1 of the tunnel, and this heat insulation waterproof board 110 which peeled is the inside of a tunnel. In the case of contact with the overhead wire, a voltage of about 22000 V was applied to the heat insulating waterproof board 110, and there was a risk of ignition. In the past, fire protection paint 150 was applied to the entire surface of each heat insulating waterproof board 110 and the like as a means for preventing ignition. However, the fire protection paint 150 is capable of instantaneously extinguishing the sparks flying from the overhead line when passing through the train. If the heat-insulated waterproofing board 110 that has peeled off contacts the overhead wire and ignites, it cannot be extinguished with the fireproof paint 150, and the other heat-insulating waterproofing board 110 that has not been peeled off can be used. Could not prevent the spread of fire.
[0012]
Further, in the conventional mounting structure of the heat insulating waterproof board 110, the joint foam 115 is fitted and bonded in the joint groove 110a between the heat insulating layers 111. However, the joint foam 115 is placed in the joint groove 110a. The holding force is mainly a fitting force due to the restoration of the joint foam 115 itself, and the adhesive force by a small amount of the sealing material 130 is only to assist the fitting force. For this reason, when the restoring force of the joint foam 115 is reduced due to aging and the fitting force is reduced, the joint foam 115 cannot be held only by a small amount of the adhesive force of the sealing material 130, and the joint foam 115 is There has been a problem that it will be peeled off from the gravel 110a in the future.
[0013]
Further, since the joint groove 110a is not formed at the start end or the end of each heat insulating waterproof plate 110 stretched on the inner wall surface 1 of the tunnel, conventionally, a joint form is formed at the joint edge 112a which is the start end or the end of each heat insulating waterproof plate 110. 115 was only adhered by the sealing material 130. For this reason, there is a problem that the joint foam 115 is particularly easily peeled off at the start or end of each heat insulating waterproof board 110 due to insufficient adhesive strength or deterioration of the sealing material 130. When the peeled joint form 115 comes into contact with the overhead wire in the tunnel, a voltage of about 22000 V is applied to the joint form 115 and there is a risk of ignition.
[0014]
In addition to this, conventionally, the joint groove 115a is fitted with the joint form 115 having the same shape as the joint groove 110a, so that there is a space for filling the sealing groove 130 in the joint groove 110a. I didn't. For this reason, there also existed a problem that the water leaked through the anchor bolt 120 could not be sealed.
[0015]
The present invention was made to solve the conventional problems as described above, and can prevent the entire heat insulating waterproofing panel for tunnels from being peeled off from the inner wall surface of the tunnel due to damage to the waterproofing layer. In addition, it is possible to prevent the joint foam from being peeled off. In the unlikely event that the heat insulating waterproof board for tunnel or the joint foam is peeled off, the heat insulating waterproof board for tunnel which can effectively prevent its ignition and its The object is to provide a mounting structure.
[0016]
[Means for Solving the Problems]
In order to achieve the above object, a heat insulating waterproof board for a tunnel according to the present invention is a heat insulating waterproof board that is stretched on the inner wall surface of a tunnel by fastening an anchor bolt and a nut, and the anchor bolt is placed on the surface side of the heat insulating layer. In addition to forming a stepped recess to pass through, the bottomed tubular portion provided with an insertion hole of the anchor bolt attached to the stepped recess and the opening of the tubular portion An anchor cap composed of a flange that comes into contact with the surface of the heat insulating layer, a waterproof layer provided with a joining edge extending outward from the heat insulating layer fixed to the back surface of the heat insulating layer, and a back surface of the waterproof layer It is composed of a floating seat fixed to a fastening portion between the anchor bolt and the nut, and each component of the heat insulating layer, the waterproof layer and the floating seat is formed by a flame retardant mainly composed of a synthetic resin. And
[0017]
Preferably, the said anchor bolt and 0.87 kg / cm ² compressive hardness of ~3.00kg / cm ² the浮座fixed to the fastening portion between the nut JIS K 6767 In the back surface of the waterproof layer construction It was.
[0018]
In order to achieve the above object, the tunnel heat insulating waterproof board mounting structure according to the present invention includes the tunnel heat insulating waterproof board overlapped with each other, and the overlapping joint edge portion is overlapped. An attachment structure that is tightly attached to the inner wall surface of a tunnel by fastening an anchor bolt and a nut, and is an elongated body having an inverted U-shaped cross section provided with a groove for receiving a nut screwed into the anchor bolt, and an outer peripheral surface When the joint foam having a configuration with the corner portion of the joint is fitted into a joint groove formed by the joint edge and both heat insulating layers, the joint groove and the cut surfaces of the joint foam are used. The formed gap is filled with a sealing material.
[0019]
Preferably, when the joint foam is bonded to a joint edge that is a start end or a terminal end of the heat insulating waterproof board for tunnel stretched on the inner wall surface of the tunnel, the joint foam is attached to the side surface of the heat insulating layer. It is set as the structure fixed with the pin, More preferably, it is set as the structure formed with the flame retardant which made the said joint form the main component in the synthetic resin.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. In FIGS. 1 to 6, reference numeral 10 denotes a heat insulating waterproof plate for tunnels (hereinafter simply referred to as a heat insulating waterproof plate), as shown in FIGS. In order to drain the water leaking from the inner wall surface 1 of the tunnel without freezing, a plurality of the heat-insulating waterproof plates 10 are stretched on the inner wall surface 1 of the tunnel by fastening the anchor bolt 20 and the nut 20a.
[0021]
11 is a heat insulating layer for blocking the inner wall surface of the tunnel from the outside air, which is formed of a foamed polyethylene resin or the like to which a flame retardant is added. As a specific example, a vertical length of 2 m, a width of 1 m, and a thickness of 10 to 200 mm. It is composed of a rectangular plate. Reference numeral 11a denotes a plurality of (six in the drawing) stepped recesses formed on the surface side of the heat insulating layer 11. An anchor cap 14 to be described later is mounted in the stepped recess 11a, and the anchor cap 14 is interposed through the anchor cap 14. It fastens with the volt | bolt 20 and the nut 20a.
[0022]
Reference numeral 12 denotes a waterproof layer for watertightly covering the inner wall surface 1 of the tunnel, which is adhered and fixed to the back surface of the heat insulating layer 11, and includes an ABS resin to which a flame retardant is added so as to have cold resistance and flame resistance. Is formed by. And the periphery of this waterproof layer 12 is provided with joint edges 12a extending outward from the four sides of the heat insulation layer 11, respectively, and when each heat insulation waterproof plate 10 is stretched on the inner wall surface 1 of the tunnel, The joint edges 12a are overlapped with each other, and several portions of the overlapped joint edges 12a are fastened by anchor bolts 20 and nuts 20a.
[0023]
13A to 13C are floating seats bonded to the back surface of the waterproof layer 12, and are bonded to the back surface of the stepped recess 11a and the joint edge 12a, which are fastening points between the anchor bolt 20 and the nut 20a. Specifically, a long floating seat 13A is bonded to the joint edge 12a on one long side, and the back side center of the joint edge 12a on the other short side and the back side of each stepped recess 11a. Short floats 13B and 13C are bonded to each other. However, as shown in FIG. 4, when a plurality of heat-insulating waterproof plates 10 are stretched on the inner wall surface of the tunnel, in the case of the heat-insulating waterproof plates 10 disposed at the start or end of the tunnel, both long side joints are joined. Long floating seats 13A and 13A are bonded to the back surfaces of the edges 12a and 12a, respectively.
[0024]
The floats 13A to 13C are provided with a waterproof layer 12 (joint edge) by a tightening force of the nut 20a for forming a gap for water passage between the waterproof layer 12 of the heat insulating waterproof plate 10 and the inner wall surface 1 of the tunnel. 12a) is fixed to the inner wall surface 1 of the tunnel without locally deforming, and in order to achieve this purpose, the floating seats 13A to 13C are The configuration is as follows.
[0025]
That is, each of the floats 13A to 13C had a compression hardness in the range of 0.87 kg / cm ^{2 to} 3.00 kg / cm ² (JIS K 6767). When the compression hardness is less than 0.87 kg / cm ^{2, the} compression hardness is too soft, and local deformation of the waterproof layer 12 cannot be prevented against the tightening force of the nut 20a. On the other hand, if it is larger than 3.00 kg / cm ^2, it is too hard to adapt to the unevenness of the inner wall surface 1 of the tunnel, causing damage and water leakage. As a result of the experiment, 1.00 kg / cm ^{2 to} 2.00 kg / cm ² is most preferable.
[0026]
Reference numeral 14 denotes an anchor cap made of a synthetic resin such as ABS to be installed in each stepped recess 11a. The anchor cap 14 disperses the tightening force of the nut 20a screwed into the anchor bolt 20 in the stepped recess 11a. In order to achieve this object, the anchor cap 14 is shown in FIG. 2 to fix the heat insulating waterproof board 10 to the inner wall surface of the tunnel without locally deforming the waterproof layer 12. As described above, the bottomed cylindrical portion 14a, the flange portion 14b in surface contact with the surface 11a of the heat insulating layer 11 formed integrally with the opening portion of the cylindrical portion 14a, and the anchor bolt drilled in the bottom portion 14c The structure is composed of 20 insertion holes 14d.
[0027]
A disk-shaped foam cap 15 is fitted into the anchor cap 14 by fitting to close the opening of the anchor cap 14 so as to completely insulate the inner wall surface 1 of the tunnel. . 2 and 6A, the outer diameter of the foam cap 15 is slightly larger than the inner diameter of the tubular portion 14a of the anchor cap 14, and the foam cap 15 is contracted into the tubular portion 14a. By pushing it in, it fits firmly. In the figure, reference numeral 15a denotes a recess for allowing the nut 20a to escape.
[0028]
Here, as raw materials for the heat insulating layer 11, the waterproof layer 12, the floats 13A to 13C, the anchor cap 14 and the foam cap 15 described above, foamed polyethylene resin, ABS resin, polystyrene resin (PS), acrylonitrile / styrene resin ( AS), polypropylene resin (PP), polyvinyl chloride resin (PVC), and the like, and the flame retardant added thereto is a so-called reactive flame retardant such as a vinyl group-containing flame retardant or a functional group-containing flame retardant. In addition, a combination of a flame retardant promoting agent such as antimony oxide or an inorganic flame retardant such as aluminum hydroxide or magnesium hydroxide can be used.
[0029]
Alternatively, each of the constituent members 11, 12, 13A to 13C, 14, 15 is formed of a plastic containing a chlorine-based flame retardant or a phosphoric acid-based flame retardant, a phenol resin having a self-extinguishing function, a flame retardant polyester resin, or the like. May be. Furthermore, since each of these components covers the inner wall surface of the tunnel, even if a voltage of at least 22000 V is applied so that even if each component is peeled off and comes into contact with an overhead wire in the tunnel, It is desirable to have flame resistance that does not ignite.
[0030]
Next, an embodiment of the mounting structure of the heat insulating waterproof board 10 described above will be described with reference to FIGS. 4 to 6. A plurality of heat insulating waterproof boards 10 are arranged vertically and horizontally while overlapping each other's joint edges 12a. The insertion holes 12b of the anchor bolts 20 are drilled on the inner wall surface 1 of the tunnel by drills (not shown) from several portions of the joint edges 12a and the portions of the insertion holes 14d of the anchor caps 14 attached to the stepped recesses 11a. Set up. Then, anchor bolts 20 are driven into the respective insertion holes 12b, nuts 20a are screwed onto the established anchor bolts 20 through washers, and the heat insulating waterproof plates 10 are tightened to the inner wall surface 1 of the tunnel. Fix it.
[0031]
Here, the fastening portion of the anchor bolt 20 and the nut 20a, compressive hardness on the back side of the waterproof layer 12 in JIS K 6767 of 0.87kg / cm ² ~3.00kg / cm ²浮座13A~13C 6B, as shown in FIG. 6B, even when the nut 20a is tightened too much, the tightening force is concentrated at one place of the joint edge 12a, and the joint edge 12a is locally deformed. There is no fear.
[0032]
Moreover, in the fastening location by the anchor bolt 20 and the nut 20a in the stepped recess 11a, the tightening force of the nut 20a is in surface contact with the lower surface of the flange portion 14b of the anchor cap 14 as shown in FIG. The heat insulating waterproof plate 10 is dispersed on the surface 11a of the heat insulating layer 11 and the heat insulating layer 11b in surface contact with the lower surface of the bottom portion 14c, and the heat insulating waterproof plate 10 can be fixed to the inner wall surface of the tunnel without locally deforming the waterproof layer 12. .
[0033]
Next, each nut 20a fastened to each anchor bolt 20 is filled with a sealing material 30 and sealed, and a foam cap 15 is fitted into each stepped recess 11a as shown in FIG. 6 (a). Match. In addition, in the joint groove 10a formed between the heat insulating layers 11 of each of the stretched heat insulating waterproof plates 10 that intersects vertically and horizontally, as shown in FIG. 6B, two types of joints having different lengths are provided. The foams 16 are respectively fitted.
[0034]
Here, the joint form 16 in the present embodiment is a long body having an inverted U-shaped cross section provided with a groove 16a for receiving a nut 20a fastened to each anchor bolt 20, as shown in FIG. Three corners on the outer peripheral surface are cut surfaces 16b. Then, the sealing material 30 is further filled in the gap between the cut surface 16b of the joint foam 16 and the heat insulating layer 11, and the joint foam 16 is bonded into the joint groove 10a. The width of the joint form 16 is formed to be slightly larger than the width of the joint groove 10a, and the joint form 16 is firmly fitted by being pushed into the joint groove 10a while being compressed.
[0035]
On the other hand, since the joint groove 10a is not formed at the start end or the end (end portion 10b = joining edge 12a) of each heat insulating waterproof board 10 stretched on the inner wall surface of the tunnel, as shown in FIG. When a joint form 17 having the same configuration as the joint form 16 (reference numeral 17a in FIG. 3 is a groove and 17b is a cut surface) is bonded to the joint edge 12a, which is the start end or the end, by a sealing material 30, the joint form 17 is used. A foam prevention pin 40 is driven from the side end face of the foam 17 toward the side surface of the heat insulating layer 11 and fixed to the side surface of the heat insulating layer 11. Thereafter, the side surfaces of the floating base 13A, the heat insulating waterproof board 10 and the joint foam 17 are further carefully sealed with the sealing material 30 to prevent cold air from entering from the side end 10b of each heat insulating waterproof board 10.
[0036]
In this way, the inner wall surface 1 of the tunnel is covered in an airtight and watertight manner by each of the heat insulating waterproof plates 10, the foam cap 15, and the joint foams 16 and 17, and the heat insulating property of the inner wall surface 1 of the tunnel is maintained. Finally, a fireproof paint 50 (see FIGS. 6A to 6C) mainly composed of an inorganic material such as a shirasu balloon is applied to the entire surface of each heat-insulating waterproof board 10, foam cap 15, and joint foams 16 and 17. .
[0037]
According to the mounting structure of the heat insulating waterproof board 10 of this embodiment described above, the corner portions of the joint foams 16 and 17 are cut surfaces 16b and 17b, so that the joint grooves 10a and end portions 10b of each heat insulating waterproof board 10 are obtained. A large amount of the sealing material 30 can be filled, and the joint foams 16 and 17 can be firmly bonded to prevent peeling, and at the same time, the water leaking along the thread groove of the anchor bolt 20 can be surely prevented. Can do.
[0038]
Further, the joint foam 17 that is bonded only to one end to the end portion 10b of each heat insulating waterproof board 10 is fixed to the side surface of the heat insulating layer 11 with the pin 40 for preventing the fall, so that peeling can be effectively prevented. . Furthermore, by forming the long joint foams 16 and 17 with a flame retardant material that can withstand the application of a voltage of 22000 V, any one of the joint foams 16 and 17 should be peeled off and contact the overhead wire in the tunnel. Even in this case, it is possible to reliably prevent the ignition and the spread of fire.
[0039]
【The invention's effect】
Since the present invention is configured as described above, according to the heat insulating waterproof plate for a tunnel of the present invention, even when the nut is tightened too much, the waterproof layer at the fastening portion is not locally deformed, and the heat insulating layer and The durability of the waterproof layer is improved. Therefore, it is possible to reliably prevent long-term damage to the tunnel insulation waterproof board, and even when the tunnel insulation waterproof board peels off from the inner wall surface of the tunnel, it can effectively prevent ignition. it can. In addition, according to the mounting structure for a heat insulating waterproof plate for a tunnel of the present invention, it is possible to reliably prevent peeling of a long joint foam, and to reliably prevent ignition and fire spread when durability is improved. There are various effects such as
[Brief description of the drawings]
FIG. 1 is a perspective view from the front surface side and the back surface side of a heat insulating waterproof board for a tunnel according to an embodiment of the present invention.
FIG. 2 is a perspective view of an anchor cap and a foam cap.
FIG. 3 is a partial perspective view of a joint form.
FIG. 4 is an exploded perspective view showing an attachment structure.
FIG. 5 is a partial front view of the attached state.
FIG. 6 is an enlarged sectional view of a fastening portion.
FIG. 7 is a perspective view of a conventional heat insulating waterproof board for tunnel.
FIG. 8 is a perspective view of a conventional anchor cap and foam cap.
FIG. 9 is a partial front view showing a state in which a conventional heat insulating waterproof board for tunnel is attached.
FIG. 10 is an enlarged sectional view of the fastening portion.
FIG. 11 is a longitudinal sectional view of a conventional tunnel heat insulating waterproof plate attached to the inner wall surface of the tunnel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tunnel inner wall surface 10 Tunnel heat insulation waterproof board 10a Joint groove 10b End part 11 Heat insulation layer 11a Stepped recessed part 12 Waterproof layer 13A-13C Floating seat 14 Anchor cap 14a Cylindrical part 14b Girder part 14c Bottom part 14d Insertion hole 15 Foam cap 16, 17 Joint form 16a, 17a Groove 16b, 17b Cut surface 20 Anchor bolt 20a Nut 30 Sealing material 40 Drop prevention pin

Claims (6)

  A heat-insulating waterproof plate that is tightly attached to the inner wall surface of the tunnel by fastening anchor bolts and nuts. When a stepped recess for inserting the anchor bolt is formed on the surface side of the heat insulating layer, it is attached to the stepped recess. An anchor cap comprising a bottomed tubular portion provided with an insertion hole for the anchor bolt at the bottom, and a flange that contacts the surface of the heat insulation layer coupled to the opening of the tubular portion, and the heat insulation layer A waterproof layer having a joining edge extending outward from the heat insulating layer fixed to the back surface of the waterproof layer, and a floating seat on the back surface of the waterproof layer and fixed to a fastening portion between the anchor bolt and the nut, A heat insulating waterproof board for tunnels, wherein the heat insulating layer, the waterproof layer, and the floating member are formed of a flame retardant mainly composed of a synthetic resin. Wherein said浮座that there on the back surface of the waterproof layer is fixed to the fastening portion between the anchor bolt and the nut, and a compressive hardness of 0.87kg / cm ² ~3.00kg / cm ² in JIS K 6767 The heat insulating waterproof plate for tunnel according to claim 1.   A heat insulating waterproof board for a tunnel according to claim 1 or 2, wherein the joint edges are overlapped with each other, and a part of the overlapped joint edges is stretched on an inner wall surface of the tunnel by fastening an anchor bolt and a nut. A joint foam having an inverted U-shaped elongated body having a groove for receiving a nut fastened to the anchor bolt and having a corner portion of the outer peripheral surface as a cut surface, Insulating and waterproofing for tunnels, characterized in that a sealing material is filled in a gap formed by the joint groove and each cut surface of the joint foam, when fitted into the joint groove formed by the heat insulating layer. Board mounting structure.   The heat insulating waterproof plate for a tunnel according to claim 1 or 2 is fixed to an inner wall surface of the tunnel by fastening an anchor bolt and a nut through an anchor cap in the stepped recess, and a sealing material is provided in the anchor cap. 4. A heat insulating waterproof board mounting structure for a tunnel according to claim 3, wherein a foam cap is press-fitted through the wall.   When the joint foam is bonded with a sealing material to the joint edge that is the start or end of the heat insulating waterproof board for the tunnel stretched on the inner wall surface of the tunnel, the joint foam is fixed to the side surface of the heat insulating layer with a pin. The heat insulating waterproof board mounting structure for a tunnel according to claim 3 or 4, wherein   The heat insulating waterproof board mounting structure for a tunnel according to claim 3, 4 or 5, wherein the joint foam and the foam cap are made of a flame retardant mainly composed of a synthetic resin.

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