JP6736815B2 - Concrete piece protective sheet - Google Patents

Description

TECHNICAL FIELD The present invention relates to a concrete piece protective sheet that covers a wall surface of a concrete structure such as a tunnel or a building to prevent falling off of the concrete.

Conventionally, in a tunnel constructed of concrete, brick, or the like, a lining may be cracked or a wall surface may be partially peeled off due to various factors such as deterioration and ground movement. A concrete piece protective sheet is known in order to prevent such concrete pieces that come off.

In the concrete piece protective sheet by the present applicant, for example, a sheet member stretched on a wall surface of a structure, a shape-retaining band installed on one end surface side of the sheet member to impart shape-retaining property, and the wall surface. It is known that a cushion member that is installed so as to protrude along the other end side of the seat member and that forms a water conduit in the gap between the wall surface and the seat member is integrated by heat and pressure molding. (See Patent Document 1).

JP, 2015-129406, A

However, in the concrete piece protective sheet with the above structure, since the sheet is stretched in the shape of a gentle arc in the vicinity of the top surface of the tunnel, water leakage from the wall surface does not flow downward. Moreover, there was a concern that the sheet would freeze on the sheet.

Then, this invention solves such a problem, and makes it a subject to provide the concrete piece protection sheet which can introduce|transduce water, without freezing the water leak from the wall surface of a tunnel.

In order to solve the above problems, the concrete piece protective sheet according to claim 1 of the present invention is a sheet member stretched on a wall surface of a structure, and is installed on one end surface side of the sheet member to maintain a shape. And a shape-retaining band for imparting a property to the shape-retaining band. The shape-retaining band is composed of a plurality of vertical strips and horizontal strips, and forms a first partition group and a second partition group having different partition areas. The horizontal conduit on the second partition group side is formed such that a water conduit formed in a gap between the wall surface and the sheet member is formed so as to project from the end surface on the wall surface side of the vertical strip toward the one end surface side. The vertical strip and the horizontal strip that form the shape retaining strip in the first section that forms a strip and installs a thermoelectric member on the sheet member in the water conduit and configures the first section group. It is characterized in that it is fixed to the wall surface via a pressing plate that abuts at least two strips of the body.

Further, the concrete piece protective sheet according to claim 2 of the present invention is the concrete piece protective sheet according to claim 1, wherein the lateral strip on the side of the second partition group has at least a maximum distance from the wall surface. A water collecting portion for collecting water leaking from the wall surface is formed at the position.

The concrete piece protective sheet according to claim 3 of the present invention is the concrete piece protective sheet according to claim 2, wherein the thermoelectric member is installed at least in the water collecting portion.

Further, the concrete piece protective sheet according to claim 4 of the present invention is the concrete piece protective sheet according to claim 2 or 3, wherein the water collecting portion is formed to be substantially parallel to the vertical strip. It is what is done.

Further, the concrete piece protective sheet according to claim 5 of the present invention is the concrete piece protective sheet according to any one of claims 1 to 4, wherein the thermoelectric member is directly attached to the sheet member. It is installed either indirectly or indirectly.

Further, the concrete piece protective sheet according to claim 6 of the present invention is the concrete piece protective sheet according to any one of claims 1 to 5, wherein the concrete piece protective sheet is provided so as to project along the wall surface. A cushion material is installed on the other end surface side of the sheet member on the side of one division group.

In the concrete piece protective sheet of the present invention, since the thermoelectric member is installed in the sheet member in the water conduit, it is possible to conduct water without freezing water leakage from the wall surface.

It is a perspective view of the concrete piece protection sheet in the example of the present invention. It is sectional drawing of the state which installed the concrete piece protection sheet in the Example of this invention in the tunnel. It is the elements on larger scale of FIG. 2 of the concrete piece protective sheet in the Example of this invention. It is a partially broken perspective view of the state where the concrete piece protection sheet in the example of the present invention was installed in the tunnel. It is sectional drawing of the state which installed the concrete piece protection sheet in another Example of this invention in the tunnel. It is a partial expanded sectional view in the state where the concrete piece protection sheet in another example of the present invention was installed in the tunnel. It is a partial expanded sectional view in the state where the concrete piece protection sheet in another example of the present invention was installed in the tunnel.

Hereinafter, a concrete piece protective sheet according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a concrete piece protective sheet. FIG. 2 is a cross-sectional view of a concrete piece protective sheet installed in a tunnel. FIG. 3 is a partially enlarged view of FIG. FIG. 4 is a partially cutaway perspective view of a concrete piece protective sheet installed in a tunnel.

As shown in FIG. 4, the concrete piece protective sheet 1 is installed on the wall surface of a concrete structure such as a tunnel or a building. In this embodiment, the concrete piece protective sheet 1 is installed on the curved wall surface W in the tunnel T. The direction from the ground side of the tunnel T to the ceiling side along the curved wall surface W is the vertical direction, and the entire length direction of the tunnel T is the horizontal direction.

As shown in FIGS. 1 to 4, the concrete piece protective sheet 1 according to the embodiment of the present invention is installed on a sheet member 2 stretched on a curved wall surface W in a tunnel T and on one end surface side of the sheet member 2. Shape retaining band 3, a cushion member 8 installed on the other end surface side of the seat member 2 to form a water conduit 9, and a thermoelectric member 11 installed on the seat member 2 in the water conduit 9. ..

The sheet member 2 is made of a synthetic resin such as vinyl chloride, which is suitable for flexibility and flexibility. It is desirable that the sheet member 2 be transparent so that a peeled state of the curved wall surface W in the tunnel T or a peeled piece can be visually observed. Further, in order to impart rigidity to the sheet member 2, a reinforcing bar (not shown) having flexibility can be provided inside the sheet member 2. The reinforcing bars may be provided in only one direction with respect to the sheet member 2, or may be provided in a lattice shape which is orthogonal to each other in two directions and is not limited to this.

The shape-retaining band 3 imparts a shape-retaining property capable of retaining the shape from the outside of the sheet member 2. The shape-retaining band 3 is formed to have substantially the same size as the sheet member 2 and is made of, for example, fiber reinforced plastic (FRP) or the like, and is integrally formed on the one end face side of the sheet member 2 by known heat and pressure molding. .. The shape-retaining band 3 includes a plurality of vertical strips 4 provided along a curved surface extending from the ground side toward the ceiling of the tunnel T, and a plurality of horizontal strips provided along the longitudinal curved surface of the tunnel T. 5 and. The shape retainer 3 may be provided so that the vertical strips 4 and the horizontal strips 5 are orthogonal to each other, and the shape retaining body 3 is not limited to this and may intersect at a predetermined angle.

In the present embodiment, as shown in FIG. 1, the shape-retaining belt 3 includes two vertical strips 4 extending in parallel at intervals of about 25 mm to 100 mm, and each set has a length of about 250 mm to 500 mm. It is configured by providing a total of two sets in the horizontal direction with intervals, and by providing a predetermined number of the horizontal strips 5 in the vertical direction with an interval of about 250 mm to 500 mm.

That is, in the present embodiment, the first section 6 having a small area defined by the pair of vertical strips 4 and the two horizontal strips 5 and the vertical sections located inside each other of the two adjacent sets. A second section 7 having a large area defined by the strip 4 and the two horizontal strips 5 is formed. Further, the first section 6 or the second section 7 is continuously formed in the vertical direction to form a first section group or a second section group. Therefore, the shape retaining band 3 is set such that the partition area of the second partition group is larger than the partition area of the first partition group, and the first partition group is formed at both left and right ends of the second partition group.

Further, in the lateral strip body 5 on the side of the second partition group, as will be described later, the depth of the water conduit 9 between the curved wall surface W of the tunnel T and the curved wall surface W of the tunnel T is cushioned. The lateral strip 5 is formed so as to be thicker than the material 8 so as to project to one end face side (inner side of the tunnel T). More specifically, the lateral strip 5 is formed so as to extend in a substantially V shape so that a substantially central portion thereof is bent. At this time, the bent portion of the horizontal strip 5 serves as a water collecting portion 10 that collects water leaking from the curved wall surface W via the left and right inclined surfaces of the sheet member 2.

The cushion material 8 forms a gap between the curved wall surface W in the tunnel T and the sheet member 2, and forms a water conduit 9 for guiding the water leaking from the curved wall surface W. The cushion material 8 is made of, for example, rubber or synthetic resin having elasticity, and is integrated with the other end surface side of the seat member 2 by known heat and pressure molding.

In this embodiment, as shown in FIGS. 1 and 3, the cushion material 8 is formed in a longitudinal shape and is installed so as to cover at least the width dimension of the first section 6. Further, from the viewpoint of improving the shape retainability of the pair of vertical strips 4 to the sheet member 2, it is more preferable that the width dimension of the cushion material 8 is substantially equal to the interval between the pair of vertical strips 4. .. As a result, a space is formed between the curved wall surface W and the sheet member 2 of the lateral strip 5 on the side of the second partition group, and the water conduit 9 is provided for guiding the water leaking from the curved wall surface W.

The thermoelectric member 11 is installed at least at the position of the water collecting section 10 where the leaked water is collected in the water conduit 9, and prevents the leaked water from being frozen due to the heat generation of the thermoelectric member 11. The thermoelectric member 11 is connected to an external power source and is directly attached to the sheet member 2 by a fixing means such as an adhesive or a tape so as to be substantially parallel to the vertical strip 4 like the water collecting portion 10. Or, it is indirectly installed on the sheet member 2 by a water conduit 12 or the like that allows the thermoelectric member 11 to be inserted therethrough. It goes without saying that the thermoelectric member 11 can be installed at any position in the water conduit 9 including the entire surface of the sheet member 2. Further, from the viewpoint of bringing the thermoelectric member 11 into contact with the leaked water collected in the water collecting unit 10, it is desirable that the water conduit 12 be directly installed on the sheet member 2 by adhesion or the like, but it should be installed indirectly. Of course, you can

In this embodiment, the thermoelectric member 11 is a self-temperature control type super trace 2NSAH-21 (manufactured by Izumi Denki Co., Ltd.), and the water conduit 12 is directly fixed to the sheet member 2 by a fixing means such as adhesion. Is a clad lip (registered trademark of Kuraray Plastics Co., Ltd.). Then, the thermoelectric member 11 is inserted and fixed in the water conduit 12, and the thermoelectric member 11 is indirectly installed on the sheet member 2 located in the water collecting section 10 via the water conduit 12.

In this way, the concrete piece protective sheet 1 in which the sheet member 2, the shape-retaining body 3 and the cushion material 8 are integrally formed by heat and pressure molding is attached to the curved wall surface W in the tunnel T as follows. ..

As shown in FIG. 2 to FIG. 4, the concrete piece protective sheet 1 is installed on a curved wall surface W in the tunnel T such as a damaged portion where peeling occurs, a damaged portion where water leakage occurs, or a joint between segments. It That is, the concrete piece protective sheet 1 is stretched along the curved wall surface W. Specifically, the concrete piece protective sheet 1 is stretched so that the longitudinal direction extends along a curved wall surface W extending from the ground side to the ceiling of the tunnel T. At this time, the tunnel T can be installed on the entire circumferential surface in the circumferential direction, or can be installed on only a part of the circumferential surface.

Further, since the concrete piece protective sheet 1 is stretched in a curved state, the cushion material 8 is in contact with the curved wall surface W in close contact. In this state, the concrete member protective sheet 1 is fixed by penetrating the sheet member 2 and the cushion material 8 with the anchor bolts 14 via the pressing plate 13 and driving them into the tunnel T.

More specifically, the anchor bolt 14 inserted into the pressing plate 13 is fixed to the curved wall surface W with the pressing plate 13 having a substantially circular shape being in contact with at least two strips forming the first section 6. The concrete piece protective sheet 1 is fixed by being installed and tightened by the nuts 15 of the anchor bolts 14. As a result, the pressure due to the tightening force of the nut 15 is transmitted to the band through the pressing plate 13 and is also transmitted to the seat member 2 and the cushion member 8 to bring the cushion member 8 into close contact with the curved wall surface W. It can be fixed with.

At the mounting position of the pressing plate 13, for example, it is located at the upper end or the lower end of the first section 6 so that it comes into contact with the three strips of the one vertical strip 4 and one horizontal strip 5. Of course, they may be arranged, or may be arranged so as to contact two strips of the set of vertical strips 4 other than the upper end or the lower end.

By fixing the concrete piece protective sheet 1 to the curved wall surface W, a water conduit 9 is formed between the sheet member 2 and the curved wall surface W for guiding the leaked water through the gap of the cushion material 8. To be done. In addition, by extending a plurality of concrete piece protective sheets 1 along the curved wall surface W, a continuous water conduit 9 can be formed. At this time, the concrete piece protective sheet 1 can be attached without causing a gap by overlapping and connecting the edges of the concrete piece protective sheet 1.

Accordingly, water leaking from the curved wall surface W can be guided to the left and right ends of the tunnel T along the curved wall surface W side of the sheet member 2 without being dropped into the tunnel T. In particular, in the vicinity of the top surface of the tunnel T, the water leaking from the curved wall surface W is collected in the water collecting portion 10 through the inclined surface of the sheet member 2 formed by the bent lateral strip 5, and the tunnel T Water can be introduced to the left and right ends of the. Further, since the thermoelectric member 11 is installed at the position of the water collecting section 10, it is possible to warm the leaked water flowing through the water collecting section 10 and prevent freezing even in winter.

As described above, according to the concrete piece protective sheet 1 according to the embodiment of the present invention described above, since each of the constituent parts is integrally formed by the heat and pressure molding, the assembling work becomes unnecessary at the installation work site and the installation work is performed. The working time can be shortened and the installation can be easily performed. Further, by making the sheet member 2 transparent, the peeled state of the curved wall surface W in the tunnel T or the peeled-off piece can be visually confirmed, so that the inspection work becomes easy. Furthermore, since the water conduit 9 is formed between the sheet member 2 and the curved wall surface W via the cushion material 8, water leakage from the curved wall surface W does not drip into the tunnel T.

Further, in the water conduit 9, the water leakage from the curved wall surface W can be collected and conducted at the water collecting portion 10 in which the thermoelectric member 11 is installed. Therefore, the water leakage can be conducted without freezing. be able to.

Further, it is needless to say that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit thereof. It is desirable that the concrete piece protective sheet 1 be formed in a size necessary for the installation range, the size for transportation, the viewpoint for manufacturing, etc.

Further, in the above embodiment, the sheet member 2 has a single layer structure, but the present invention is not limited to this. It is also possible to form the sheet member 2 from a multi-layer structure such as a two-layer structure or a three-layer structure, and to form an air layer in the gap between the layers. This makes it possible to obtain a sheet member having a heat insulating effect, which is more effective in cold regions and the like.

Regarding the horizontal strips 5 in the shape-retaining strip 3, the approximately central portion of the horizontal strips 5 on the second partition group side is bent into a substantially V-shape to form the water collecting portion 10. , But not limited to this. For example, as shown in FIG. 5A, the horizontal strip 5 on the side of the second partition group is formed in a substantially arc shape, and the top portion having the maximum distance from the curved wall surface W is configured as the water collecting portion 10. You can also Further, as shown in FIG. 3B, after bending the horizontal strip 5 on the side of the first partition group so as to have a step portion, the substantially central portion is bent into a substantially V shape to collect water. Can also be formed. Further, as shown in FIG. 3C, after the lateral strip 5 on the first partition group side is curved so as to have a step, the substantially central portion is bent into a substantially V-shape to collect water. Can also be formed.

Moreover, the horizontal strips 5 on the second partition group side can be formed by appropriately combining these shapes, or a plurality of water collecting portions 10 can be formed. In this case, it is possible to form the plurality of water collecting portions 10 so that the distances to the curved wall surface W are different. That is, in the lateral strip body 5 on the side of the second partition group, the lateral strip body 5 is formed on one end face side (tunnel side) so as to form a water conduit 9 larger than the thickness of the cushion material 8 between the lateral strip body 5 and the curved wall surface W. It is only necessary that the water collecting portion 10 is formed at the position where the distance to the curved wall surface W is at least maximized, while the water collecting portion 10 is formed by being bent or curved inward (to the inner side of T).

Further, the cushion material 8 is formed in the longitudinal shape of the concrete piece protective sheet 1 and covers at least the width dimension of the first section 6, but the present invention is not limited to this. It is also possible to divide the cushion member 8 in the vertical direction so as to have a width dimension substantially equal to that of the vertical strip plate 4 and to dispose the cushion material 8 so as to face the vertical strip plate 4. That is, it is only necessary to provide the cushion material 8 at a position facing the vertical strip 4 so as to correspond to at least the width dimension of the vertical strip 4. Further, the cushion material 8 can be installed in the area of the second section 7.

Further, in the water conduit 9, it is formed by installing the cushion material 8 between the curved wall surface W in the tunnel T and the seat member 2, but the present invention is not limited to this. For example, the cushion material 8 may not be provided, and the cushion material 8 may be installed in the tunnel T through the vertical strip 4. In such a case, it goes without saying that the horizontal strip 5 can be formed to form the water conduit 9 as shown in FIG. 5, and the curved wall surface W of the horizontal strip 5 can be formed as shown in FIG. It is also possible to form the water conduit 9 by making at least a part of the end surface on the side closer to the one end surface (inner side of the tunnel T). That is, in the water conduit 9, regardless of the presence or absence of the cushion material 8, it is formed at least in the gap between the curved wall surface W and the sheet member 2 and protrudes from the end surface on the curved wall surface W side of the vertical strip 4 to the one end surface side. It is only necessary that the lateral strips 5 on the second partition group side be formed so as to be formed.

Further, when fixing the concrete piece protective sheet 1 with the anchor bolts 14, as shown in FIG. 7, a seal member 16 can be installed between the sheet member 2 and the pressing plate 13. The seal member 16 is made of, for example, rubber, elastic synthetic resin, or the like, is fixed by being penetrated by the anchor bolt 14, and is installed in a compressed state in a gap between the sheet member 2 and the pressing plate 13. Thereby, the water around the anchor bolt 14 can be stopped. That is, even when the cushion member 8 having a width dimension substantially equal to that of the vertical strip plate 4 is provided, water can be stopped around the anchor bolt 14. Further, when the cushion material 8 having the width dimension of at least the first section 6 is provided, the cushion material 8 and the seal member 16 can stop the water around the anchor bolt 14 with a double structure, Will be preferred.

DESCRIPTION OF SYMBOLS 1 Concrete piece protective sheet 2 Sheet member 3 Shape retention strip 4 Vertical strip 5 Horizontal strip 6 First section 7 Second section 8 Cushion material 9 Water conduit 10 Water collecting part 11 Thermoelectric member 12 Water conduit 13 Press plate 14 Anchor bolt 15 Nut 16 Seal member

Claims (6)

A sheet member stretched on the wall surface of the structure,
It is provided on one end surface side of the sheet member, and is provided with a shape retaining band for imparting shape retaining property,
The shape-retaining belt is composed of a plurality of vertical strips and horizontal strips, and forms a first division group and a second division group having different division areas,
The horizontal strip on the side of the second partition group so that a water conduit formed in the gap between the wall surface and the sheet member is formed to project from the end face on the wall face side of the vertical strip to the one end face side. Along with forming a thermoelectric member to the sheet member in the water conduit,
In the 1st division which constitutes the 1st division group, it is fixed to the wall surface via a pressing plate which abuts at least two strips of the vertical strips and the horizontal strips that form the shape-retaining strip. A concrete piece protective sheet characterized by being used. The concrete according to claim 1, wherein the lateral strip on the side of the second partition group has a water collecting portion for collecting water leaked from the wall surface at a position where a distance from the wall surface is at least a maximum. One-sided protective sheet. The concrete piece protective sheet according to claim 2, wherein the thermoelectric member is installed at least in the water collecting portion. The concrete piece protective sheet according to claim 2 or 3, wherein the water collecting portion is formed to be substantially parallel to the vertical strip. The concrete piece protection sheet according to any one of claims 1 to 4, wherein the thermoelectric member is directly or indirectly installed on the sheet member. The concrete piece protective sheet according to any one of claims 1 to 5, which is provided so as to project along the wall surface, and a cushion material is installed on the other end surface side of the sheet member on the first partition group side. ..

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