JP7273578B2 - Repair waterproof structure and its construction method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repaired waterproof structure for repairing an existing waterproof layer among waterproof structures such as roofs, roofs, and balconies, and a construction method thereof.

2. Description of the Related Art Conventionally, waterproof construction using a waterproof sheet as a waterproof layer has been carried out in order to waterproof the building frames of verandas, balconies, flat roofs, and the like. There is concern that these waterproof sheets will deteriorate over time and their waterproofness will decrease, so the existing waterproof sheets are being repaired at appropriate times.

When repairing such an existing waterproof sheet using a waterproof sheet, a mechanical fixing construction method is often used. In the repair method using a mechanical fixing method, the waterproof sheet for repair is laid on top of the existing waterproof sheet, and the waterproof sheet for repair is fixed to the base using fixing discs fixed to the base with screws. ing.

Patent Document 1 discloses a waterproof sheet for repair used for laying from above for the purpose of repairing an existing waterproof sheet laid on a base, in which a thermoplastic resin film is laminated at least on the lower surface of a main body of a waterproof sheet made of rubber. It is disclosed that a fixed plate is anchor-fixed on the existing waterproof sheet in advance, and the repair waterproof sheet is laid and fixed by heat-sealing the fixed plate to the fixed plate.

JP 2006-125182 A

However, if the mechanical fixing method is used for repairing, it is necessary to drive screws into the foundation to fix the fixing disc, which causes problems such as noise and vibration. Therefore, it is possible to use an adhesive construction method in which a new waterproof sheet for repair is fixed using an adhesive.
If repairs are performed using the adhesive method, the deteriorated joints between the existing waterproof sheets may be cut or moved due to the movement of the base material, and the new waterproof sheets laid and fixed on the joints may be cut or wrinkled. Concerned.

That is, in the present invention, when repairing an existing waterproof sheet, the occurrence of noise and vibration is prevented, and joints of the existing waterproof sheet are cut or moved, resulting in the danger of tearing or wrinkling of the new waterproof sheet. The purpose is to reduce

The gist of the means used to solve the problem is to lay and fix a new waterproof layer on the existing waterproof sheet with an adhesive, and to apply the adhesive over the joints of the existing waterproof sheet.
Specifically, an adhesive layer formed by covering the joints of the existing waterproof sheet laid and fixed on the base with an adhesive, and a sheet-like new waterproof layer laid and fixed to the existing waterproof layer by the adhesive layer. and a modified waterproof structure having a buffer sheet in which a new waterproof layer is adhered to an adhesive layer, and a new waterproof sheet preliminarily laminated and integrated with the buffer sheet. Also, one buffer sheet may be laid so as to cover the joint portion, and it is preferable that the new waterproof layer has a joint piece that is a new waterproof sheet portion where no buffer sheet is laminated. In addition, when a joint piece is provided, the new waterproof layer has a first new waterproof layer and a second new waterproof layer adjacent to the first new waterproof layer, and a joint between the first new waterproof layer and the second new waterproof layer. is preferably a modified waterproof structure in which the joint piece of the second new waterproof layer is joined onto the first new waterproof layer.
In addition, the new waterproof layer further has a first new waterproof layer and a third new waterproof layer adjacent to each other, and the third new waterproof layer is provided at an edge portion substantially orthogonal to the edge portion having the joint piece of the first new waterproof layer. It is preferable to provide a repaired waterproof structure in which a layer is laid and a joint sheet is joined so as to cover the joint between the first new waterproof layer and the third new waterproof layer.
Furthermore, as a construction method, a process of applying an adhesive so as to cover the joints of a plurality of existing waterproof sheets laid and fixed on the base to form an adhesive layer, and a process of laying and fixing a new waterproof layer on the adhesive layer. and a method for constructing a repaired waterproof structure having a buffer sheet in which the new waterproof layer is adhered to the adhesive layer, and the buffer sheet and the new waterproof sheet preliminarily laminated and integrated.

According to the present invention, by fixing the new waterproof layer with an adhesive, it is possible to prevent the generation of noise and vibration during repair. Also, by applying an adhesive over the joints of the existing waterproof sheet and laying and fixing a new waterproof layer, a new waterproof layer is formed while repairing the deteriorated joints. As a result, it is possible to provide a repaired waterproof structure and its construction method, which can reduce the risk that the joint part of the existing waterproof layer will be cut or move, and that the new waterproof layer will be cut or wrinkled.

1 is a partial cross-sectional view of a modified waterproof structure according to an embodiment of the present invention; FIG. FIG. 4 is a partial plan view showing an example of arrangement of an existing waterproof sheet and an adhesive layer according to the present invention; FIG. 4 is a partial plan view showing an example of arrangement of the existing waterproof sheet and the new waterproof layer according to the present invention; FIG. 4 is a partial plan view showing an example of arrangement of the existing waterproof sheet and the new waterproof layer according to the present invention; FIG. 4 is a partial plan view showing a state of application of an adhesive on an adhesive layer according to the present invention; FIG. 4 is a partial plan view showing a state of application of adhesive; FIG. 4 is a partial plan view showing an example of arrangement of a new waterproof layer in the present invention;

An embodiment of the present invention will be described below with reference to the drawings.

The present invention will be described with reference to FIG. An existing waterproof sheet P is laid and fixed on the base S, and an adhesive layer A is provided on the existing waterproof sheet P with an adhesive. Here, the adhesive layer A is formed by being continuously applied over the joint portion M of the existing waterproof sheet. A new waterproof layer 3 is laid and fixed on the adhesive layer A. The new waterproof layer 3 has a buffer sheet 1 and a new waterproof sheet 2, and the buffer sheet 1 and the new waterproof sheet 2 are previously laminated and integrated before construction. A buffer sheet 1 is fixed to the adhesive layer A, and a new waterproof sheet 2 is arranged on the surface side.
Here, the joint portion M is approximately the overlapping portion between the existing waterproof sheet P1 and the existing waterproof sheet P2.

Here, the existing waterproof sheet P and the new waterproof layer 3 are sheets. Therefore, the shorter side of the sheet is defined as the width, and the side perpendicular to the width and longer than the width is defined as the length. Also, the width side may be referred to as the width direction, and the length side may be referred to as the longitudinal direction.

As shown in FIG. 2, the joint portion M of the existing waterproof sheet P has a joint portion M2 parallel to the longitudinal direction of the existing waterproof sheet P and a joint portion M1 provided in the width direction. An adhesive is applied so as to continuously cover the joint portion M, and an adhesive layer A is provided. An adhesive layer may be provided over either one of the joints, but it is preferable that the adhesive layer A is formed over both joints M1 and M2, thereby providing a new joint in both the longitudinal direction and the width direction. This is preferable because it is possible to reduce the occurrence of cuts and wrinkles in the waterproof layer 3 .

When applying the adhesive to form the adhesive layer A, if the adhesive is applied in accordance with the existing waterproof sheet P, the adhesive is divided for each joint portion of the existing waterproof sheet P and is not applied over the joint portion, which is not preferable. When the adhesive is applied using a combed trowel, if the adhesive comb J is provided in parallel with the joint M as shown in FIG. It is not applied and is not preferable.

On the other hand, when the adhesive is applied using a comb-like trowel as shown in FIG. Also, when the adhesive is applied using a roller, it is preferable to apply the adhesive by arranging the roller so as to straddle the joint so that the adhesive is applied over the joint M.
In this way, the fact that the adhesive layer A is continuously formed so as to cover the joint portion M does not require that the adhesive be applied so as to completely cover the joint portion M, and the comb pattern of the adhesive does not need to be applied. It is sufficient that the joint portion M is covered so that the streak-like adhesive crosses the joint portion M as shown in FIG.

The new waterproof layer 3 is formed by laminating and integrating the buffer sheet 1 and the new waterproof sheet 2. - 特許庁The cushioning sheet 1 prevents the movement of the existing waterproof sheet P from being directly transmitted to the new waterproof sheet 2 when the existing waterproof sheet P moves with the movement of the substrate, thereby preventing the new waterproof sheet 2 from being cut or wrinkled. be. Since the buffer sheet 1 and the new waterproof sheet 2 are laminated and integrated, the step of joining the buffer sheet 1 and the new waterproof sheet 2 can be reduced.
Further, the buffer sheet is also fixed to the joint portion M of the existing waterproof sheet P via the adhesive layer A, and the joint portion M, particularly the deteriorated joint portion M, is repaired with the adhesive and the buffer sheet.

Adjacent new waterproof layers 3 are required to overlap adjacent new waterproof sheets 2 in order to increase waterproofness. Therefore, it is preferable that the new waterproof layer 3 has a joint piece 4 as shown in FIG. The width of the buffer sheet 1 is set to be shorter than that of the new waterproof sheet 2, the buffer sheet 1 is not laminated on the new waterproof layer 3, and the part formed by the new waterproof sheet 2 serves as the joining piece 4. - 特許庁That is, the joint piece 4 is formed of the new waterproof sheet 2 .

Next, joining using the joining piece 4 will be described with reference to FIG. The first new waterproof layer, the second new waterproof layer, and the third new waterproof layer are new waterproof layers, and the first new waterproof sheet and the second new waterproof sheet are new waterproof sheets.
The joining piece 42 of the second new waterproof layer 32 is placed on top of the first new waterproof sheet 21, and the joining piece 42 and the first new waterproof sheet 21 are joined together. Therefore, the joint portion N between the first new waterproof layer 31 and the second new waterproof layer 32 is overlapped with the joint piece 42 which is a part of the second new waterproof sheet of the second new waterproof layer.

Here, when the joint portion M of the existing waterproof sheet P is cut or moved, if there is a joint portion N of the new waterproof layer 3 above the joint portion M, there is a concern that the upper joint portion N will also be cut. be done. Therefore, as shown in FIG. 1, by preventing the joint portion M of the existing waterproof sheet P and the joint portion N of the new waterproof layer 3 from overlapping, the risk of the joint portion N breaking can be further reduced, which is preferable. That is, it is preferable to lay and fix the new waterproof layer 3 covering the joint portion M of the existing waterproof sheet P. Here, if the buffer sheet 1 covers the joint portion M, the new waterproof layer 3 covers the joint portion M.
3 and 4 are partial plan views schematically showing the arrangement of the existing waterproof sheet P and the new waterproof layer 3. FIG. A portion surrounded by a dotted line indicates one existing waterproof sheet P, and a dotted line indicates a joint portion M. Similarly, a portion surrounded by a solid line indicates one new waterproof layer 3, and a solid line indicates a joint portion N.
Furthermore, as shown in FIG. 3, it is said that the new waterproof layer 3 is laid so as to cover both the joints M2 in the longitudinal direction and the joints M1 in the lateral direction of the existing waterproof sheet P so as to further enhance the waterproofness. It is preferable from the point of Also, due to restrictions on the arrangement of the existing waterproof sheet P and the arrangement of the new waterproof layer 3, the new waterproof layer 3 may be laid and fixed so as to cover only one joint portion.

Further, as shown in FIG. 3, the new waterproof layer 3 may be laid so that the longitudinal direction of the existing waterproof sheet P and the longitudinal direction of the new waterproof layer 3 are substantially parallel, or as shown in FIG. You may arrange|position the new waterproof layer 3 so that it may be substantially orthogonal to the longitudinal direction of.

Here, when the width of the existing waterproof sheet P and the width of the new waterproof layer 3 are substantially the same, if the existing waterproof sheet P and the new waterproof layer 3 are arranged in parallel as shown in FIG. The joint part N of the new waterproof layer is likely to overlap vertically. In such a case, by arranging the existing waterproof sheet P and the new waterproof layer 3 so as to be substantially perpendicular to each other as shown in FIG. Instead, the new waterproof layer 3 can be arranged so as to cover at least the joint portion M1 of the existing waterproof sheet P in the width direction, which is preferable.

FIG. 7 is a partial plan view schematically showing the arrangement of the new waterproof layers 3. In FIG. 7, six new waterproof layers 3 are arranged.
When a plurality of new waterproof layers 3 are laid on the existing waterproof sheet P, joints of the new waterproof layers 3 are formed with joints N1 in the width direction and N2 in the longitudinal direction as shown in FIG. Here, the new waterproof layer 3 has a joint piece 4, and when the joint piece 4 is provided in the longitudinal direction of the new waterproof layer 3, the first new waterproof layer 31 and the second new waterproof layer are adjacent to each other. 32, the joining piece 42 of the second new waterproof layer 32 is overlapped on the first new waterproof sheet 21 of the first new waterproof layer 31 and joined and fixed.

On the other hand, when the first new waterproof layer 31 and the third new waterproof layer 33 are in contact with each other at the edges in the width direction, that is, when the adjacent new waterproof layers 3 are adjacent to each other at a portion without the joint piece 4, the width The directional joint portion N2 can also be overlapped with the adjacent new waterproof layer 3 and joined with an adhesive or the like.
In addition, the first new waterproof layer 31 and the third new waterproof layer 33 adjacent to each other are arranged with the edges in the width direction pressed against each other, and a joint portion sheet of the same type as the new waterproof sheet 2 is formed on the joint portion N1 formed by pressing against each other. It is preferable to join T so as to cover the joint portion N1. By joining the joint part N1 of the new waterproof layer 3 with the joint part sheet T of the same type as the new waterproof sheet 2 in this way, the joint strength and stability of the joint part N1 are increased, and the waterproofness is improved, which is preferable.
Further, as shown in FIG. 7, by covering and joining a plurality of joint portions N1 in the width direction with one joint portion sheet T, workability is simplified and waterproofness is improved, which is more preferable.

Furthermore, in the embodiment of the present invention, it is preferable that the entire surface of the existing waterproof sheet P is refurbished. Not only is waterproofing improved by performing a full refurbishment rather than a partial refurbishment, but embodiments of the present invention are suitable for full refurbishment. In addition, even if it is a complete renovation, depending on the parapet or other structures, there may be cases where the surroundings of that part have a different construction structure. It is preferred to modify in the embodiment of

In this way, if almost the entire surface of the existing waterproof sheet P is refurbished with the new waterproof layer 3, the existing waterproof sheet P and the new waterproof layer 3 can form a double waterproof layer, which is preferable. In this case, it is preferable to inspect the existing waterproof sheet P and repair it to ensure waterproofness.

The base S may be of any material and structure as long as it is used in conventional waterproof structures such as reinforced concrete, ALC, wooden, steel, and metal folded roofs.

The new waterproof layer 3 is formed by laminating and integrating the buffer sheet 1 and the new waterproof sheet 2. - 特許庁As the new waterproof sheet 2, general new waterproof sheets such as polyvinyl chloride resin, vulcanized rubber, non-vulcanized rubber, thermoplastic elastomer, olefin, and ethylene vinyl acetate resin can be used.
The new waterproof sheet 2 may be a single layer of a thermoplastic resin layer, but from the viewpoint of excellent dimensional stability and tensile strength, a multi-layer product in which base layers such as glass cloth, glass nonwoven fabric, polyester cloth, polyester nonwoven fabric, etc. are laminated is preferred. preferable. The substrate layer may be provided in the bottom layer, or may be provided in the middle of the thermoplastic resin layer. Further, the thermoplastic resin layer may be a single layer or a plurality of layers, and each layer may have a different composition.
Also, the existing waterproof sheet P may be made of the same material as the new waterproof sheet 2 .

Here, the novel waterproof sheet 2 is preferably made of a polyvinyl chloride resin system because of its excellent flexibility and bondability. When a polyvinyl chloride resin-based waterproof sheet or an olefin-based waterproof sheet is used as the existing new waterproof sheet P, the new waterproof sheet 2 of the new waterproof layer 3 is preferably a polyvinyl chloride resin-based waterproof sheet.

The buffer sheet 1 used for the new waterproof layer 3 may be any one that reduces the transmission of the movement of the base to the new waterproof layer 3 and prevents the new waterproof layer 3 from breaking or wrinkling. Therefore, a sheet-like material having a certain degree of flexibility is preferred, and a foamed sheet or the like is preferably used. As the foam sheet, a polyolefin-based material such as polyethylene, a styrene-based material, or a polyurethane-based material can be used. Moreover, the buffer sheet 1 is adhered to the existing waterproof sheet P with an adhesive, and is also laminated with the new waterproof sheet 2 . Therefore, the other side of the cushioning sheet 1 laminated with the new waterproof sheet 2 is adhered to the existing waterproof sheet P via an adhesive. It is preferable that a reinforcing layer such as non-woven fabric, woven fabric, or paper is provided so that the bonded portion with the existing waterproof sheet P is strongly bonded and the foam sheet constituting the buffer sheet 1 is not easily broken. .

When the buffer sheet 1 has a reinforcing layer, the fibers used for the non-woven fabric and woven fabric include natural fibers such as cotton, wool, hemp, pulp, silk, mineral fibers, and chemical fibers such as rayon (regenerated fiber). Nylon, polyester, polypropylene, acrylic fibers, vinylon, and aramid fibers can be used.

Here, since the new waterproof layer 3 is bonded and fixed to the adhesive layer A through the buffer sheet 1, in order to prevent the new waterproof layer 3 from peeling off due to wind pressure, the foam sheet and the nonwoven fabric in the buffer sheet 1 must be combined. It is preferable that the peel strength between the reinforcing layer and the existing waterproof sheet P is greater than the peel strength between the reinforcing layer and the existing waterproof sheet P. Moreover, it is preferable that the peel strength between the foam sheet of the buffer sheet 1 and the new waterproof sheet 2 is greater than the peel strength between the reinforcing layer such as a non-woven fabric and the existing waterproof sheet P. Therefore, when the new waterproof layer 3 is fixed on the existing waterproof sheet P via the adhesive layer A, it is preferable that the adhesive fails cohesively, or the foamed sheet of the buffer sheet 1 breaks. is preferred.

As the adhesive constituting the adhesive layer A, an adhesive that can sufficiently bond the existing waterproof sheet P and the buffer sheet 1 of the new waterproof layer 3 can be used. (Styrene-butadiene rubber) type, urethane type, acrylic type and the like.

It is preferable to select the adhesive according to the existing waterproof sheet and the new waterproof layer. When a polyvinyl chloride resin-based waterproof sheet is used for the existing waterproof sheet P, it is preferable to use an NBR-based adhesive as the adhesive because sufficient bonding strength can be obtained. Further, when an olefin waterproof sheet is used for the existing waterproof sheet P, it is preferable to use an SBR adhesive as the adhesive because sufficient bonding strength can be obtained.

In such a case, the NBR-based adhesive or SBR-based adhesive can be applied to the existing waterproof sheet P, and the new waterproof layer 3 may also be applied with the adhesive. In particular, when a polyvinyl chloride resin-based waterproof sheet is used as the existing waterproof sheet P, the NBR-based adhesive can be applied to both sides of the existing waterproof sheet P and the new waterproof layer 3 to bond them more firmly.

If the existing waterproof sheet P is a polyvinyl chloride resin waterproof sheet or an olefin waterproof sheet, the method of joining the existing waterproof sheet P to the substrate is a mechanical fixing method using fixing screws and fixing discs. Alternatively, a bonding method using an adhesive may be used.
When using a polyvinyl chloride resin waterproof sheet as the existing new waterproof sheet P and using a mechanical fixing method, the polyvinyl chloride resin waterproof sheet is laid on the base S, and a fixing disk is placed and fixed from above. It is possible to fix the polyvinyl chloride resin waterproof sheet with a fixing disk by driving a screw for fixing, or place a fixing disk on the base and fix it to the base with a fixing screw, and then apply polyvinyl chloride from the top of the fixing disk. A vinyl resin waterproof sheet may be laid, and the polyvinyl chloride resin waterproof sheet and the fixing disk may be fixed by a bonding agent provided on the upper surface of the fixing disk.
In addition, when using a polyvinyl chloride resin waterproof sheet as the existing new waterproof sheet P and using an adhesive construction method, an NBR adhesive is applied to both sides of the substrate and the polyvinyl chloride resin waterproof sheet, and polyvinyl chloride is applied to the substrate. A resin-based waterproof sheet can be laid and fixed.
When a polyolefin waterproof sheet is used as the existing waterproof sheet P and an adhesive construction method is adopted, an SBR adhesive can be applied to the substrate, and the polyolefin waterproof sheet can be laid and fixed on the substrate.
In FIG. 1, the existing waterproof sheet P is fixed to the substrate S with an adhesive (not shown).

The same kind of joint sheet T as the new waterproof sheet 2 can be used. When the new waterproof sheet 2 of the new waterproof layer 3 is a polyvinyl chloride resin waterproof sheet, it is preferable to use a polyvinyl chloride resin waterproof sheet also for the bonding sheet.

Here, the bonding between the new waterproof sheets 2 of the adjacent new waterproof layers 3 is preferably performed by welding with a solvent or by heat. It is preferable because it is excellent in stability over time. If the new waterproof sheet 2 is a polyvinyl chloride resin waterproof sheet, the joint piece 4 of the new waterproof layer 3 is also made of the polyvinyl chloride resin waterproof sheet. Therefore, since the joining piece 4 and the new waterproof sheet 2 overlapping the joining piece 4 are made of a polyvinyl chloride resin waterproof sheet, the joining piece 4 and the new waterproof sheet 2 can be joined by fusion bonding. Further, by using the same polyvinyl chloride resin waterproof sheet as the new waterproof sheet 2 for the joint sheet T, the new waterproof sheet 2 and the joint sheet T can be joined by fusion.
A good solvent for the resin constituting the new waterproof sheet 2 is preferable as the solvent used in the welding using the solvent. For example, when the new waterproof sheet 2 is a polyvinyl chloride resin-based waterproof sheet, it is preferable to use THF as the main component.

Here, if the strength of the existing waterproof sheet P to the substrate S is not sufficient, the existing waterproof sheet P can be repaired. If the existing waterproof sheet P is joined by an adhesive method, cut the part where the joining strength is not sufficient, apply adhesive to the base, and join the cut existing waterproof sheet P again, or attach it to the cut part. A new waterproof sheet for repair may be laid and fixed.
In addition, when the existing waterproof sheet P is fixed by mechanical fixing, the portion that is not sufficiently fixed may be repaired using a fixing disk or a fixing disk.

Next, the construction method of the repair waterproof structure will be described with reference to FIGS. 1 and 2. After the existing waterproof sheet P is applied, an adhesive is applied as an adhesive layer to form an adhesive layer A, and a new waterproof layer 3 is laid on the adhesive layer A and fixed. Here, the adhesive is applied over the joint portion M of the existing waterproof sheet P. As shown in FIG.

More specifically, an existing waterproof sheet P is laid on a base S, and an adhesive is applied onto the existing waterproof sheet P to form an adhesive layer A. A new waterproof layer 3 in which a buffer sheet 1 and a new waterproof sheet 2 are laminated and integrated is laid on an adhesive layer A. An adhesive is applied over the joint portion M of the existing waterproof sheet P. At this time, the new waterproof layer 3 has a joint piece 4, the second new waterproof layer is laid and fixed in parallel with the longitudinal direction of the first new waterproof layer 31, and the joint piece 42 of the second new waterproof layer is attached to the second new waterproof layer. 1 new waterproof layer was placed on top of the first new waterproof sheet and joined by welding with a solvent. Also, the joining pieces 4 may be joined by heat fusion. Then, the third new waterproof layer is laid and fixed so as to be adjacent to the edge portion in the width direction of the first new waterproof layer. A band-shaped joint part sheet T is fused so as to cover the joint part N1 of the first new waterproof layer and the third new waterproof layer. Here, the joint tape T is made of the same kind of waterproof sheet as the new waterproof sheet 2 .

An embodiment of the present invention will be described below mainly with reference to FIGS. 1 and 7. FIG.
"Example 1"
In FIG. 1, an NBR-based adhesive is applied onto a polyvinyl chloride resin-based waterproof sheet, which is an existing waterproof sheet P. The adhesive is continuously applied so as to cover the joint portion M with a pectinate of the adhesive formed in an arc shape. As a result, an adhesive layer A is formed in which the joint portion M is covered with the adhesive in streaks while the comb pattern of the adhesive crosses the joint portion M. As shown in FIG. In the new waterproof layer 3 (31, 32), the buffer sheet 1 is laminated and integrated with the new waterproof sheet 2 (21, 22). The new waterproof sheet 2 (21, 22) uses a polyvinyl chloride resin waterproof sheet, and the buffer sheet 1 is a polyethylene foam sheet laminated with a polyester non-woven fabric. Then, the new waterproof layers 3 (31, 32) are laid and fixed on the existing waterproof sheet P so that the back surface of the new waterproof layers 3 (31, 32), that is, the polyester-based nonwoven fabric surface of the buffer sheet 1 is in contact with the new waterproof layers 3 (31, 32). At this time, the NBR-based adhesive is also applied to the surface of the polyester-based nonwoven fabric as a reinforcing layer of the buffer sheet 1 .

In FIG. 7, a second new waterproof layer 32 is laid and fixed adjacent to the first new waterproof layer 31 along its longitudinal edge. The second new waterproof layer 32 is provided with joint pieces 42 along the longitudinal direction. Here, since the new waterproof sheets 2 (21, 22) are made of a polyvinyl chloride resin waterproof sheet, this joining piece 4 (42) is also made of a polyvinyl chloride resin waterproof sheet. The joining piece 42 is superimposed on the first new waterproof sheet 21 of the first new waterproof layer 31, and the joining piece 42 and the first new waterproof sheet 21 are joined by welding with a solvent. The joining piece 42 and the first new waterproof sheet 21 may be joined by heat fusion. Furthermore, a sealer (not shown) is applied to the edges of the joint piece 42 and the first new waterproof sheet 21 .

Further, in FIG. 7, the third new waterproof layer 33 adjacent to the first new waterproof layer 31 at the edge in the width direction is also laid and fixed using the NBR adhesive. The fixing of the third new waterproof layer 33 is the same as that of the new waterproof layers 3 (31, 32) shown in FIG. The adhesive is applied continuously. A joint portion N1 between the first new waterproof layer 31 and the third new waterproof layer 33 is formed to face each other. Further, no joining pieces are provided at the edges in the width direction of the new waterproof layer 3 . A joint portion sheet T narrower than the new waterproof sheet 2 of the new waterproof layer is laid so as to cover the joint portion N1, and the new waterproof sheets 31, 33 and the joint portion sheet T are joined by liquid welding using a solvent. ing. The new waterproof sheets 31, 33 and the joint sheet T may be joined by heat fusion. Furthermore, sealer (not shown) is applied to the edges of the new waterproof sheets 31 and 33 and the joint sheet T. As shown in FIG. The joint sheet T has the same structure and composition as the new waterproof sheet 2 .
Here, when laying a plurality of new waterproof layers, the example shown in Embodiment 1 may be repeated a necessary number of times, and the same repair structure can be made over the entire planar portion of the existing waterproof sheet P. .

"Example 2"
The existing waterproof sheet P is composed of an olefinic waterproof sheet. In Example 1, by changing the adhesive from the NBR type to the SBR type and changing the application of the adhesive to one-sided coating only on the upper surface of the existing waterproof sheet, it is possible to similarly make a repaired waterproof structure.

"Example 3"
The construction method of Example 1 is shown. In FIG. 1, an NBR-based adhesive is applied onto a polyvinyl chloride resin-based waterproof sheet, which is an existing waterproof sheet P, using a pectinate trowel. At this time, the adhesive is continuously applied over the joint portion M so that the comb pattern of the adhesive is formed in the joint portion M in an arc shape. As a result, an adhesive layer A is formed in which the joint portion M is covered with the adhesive in streaks while the comb pattern of the adhesive crosses the joint portion M. As shown in FIG. Here, the new waterproof layer 3 is formed by laminating and integrating the buffer sheet 1 with the new waterproof sheet 2 . The new waterproof sheet 2 is a polyvinyl chloride resin waterproof sheet, and the buffer sheet 1 is a polyethylene foam sheet laminated with a polyester non-woven fabric.
Then, the NBER-based adhesive is also applied to the back surface of the new waterproof layer 3, that is, the polyester nonwoven fabric surface of the buffer sheet 1, and the new waterproof layer is formed so that the polyester nonwoven fabric surface is in contact with the adhesive layer A on the existing waterproof sheet P. 3 is laid and fixed with an NBR adhesive.

Also, in FIG. 7, the second new waterproof layer (32) is provided with joint pieces 4 along the longitudinal direction. Here, since the new waterproof sheets 2 (21, 22) are made of a polyvinyl chloride resin waterproof sheet, the joining piece 4 is also made of a polyvinyl chloride resin waterproof sheet. A second new waterproof layer 32 is laid and fixed adjacent to the first new waterproof layer 31 and its longitudinal edge. Then, the joining piece 42 of the second new waterproof layer 32 is placed on the first new waterproof sheet 21 of the first new waterproof layer 31, and the joining piece 42 and the first new waterproof sheet 21 are joined by welding with a solvent. The joining piece 42 and the first new waterproof sheet 21 may be joined by heat fusion. Further, a sealer (not shown) is applied to the edges of the joint piece 42 and the first new waterproof sheet 21 .

Further, in FIG. 7, the third new waterproof layer 33 is laid and fixed adjacent to the widthwise edge of the first new waterproof layer 31 using an NBR adhesive. The fixing of the third new waterproof layer 33 is the same as that of the new waterproof layers 3 (31, 32) shown in FIG. An adhesive is continuously applied so as to cover the formed joint portion M1. Here, since joint pieces are not provided at the edges in the width direction of the new waterproof layer 3, the first new waterproof layer 31 and the third new waterproof layer 33 are laid facing each other. Then, a joint part sheet T narrower than the new waterproof sheet 2 of the new waterproof layer 3 is laid so as to cover the joint part N1 formed by the first new waterproof layer 31 and the third new waterproof layer 33.例文帳に追加The new waterproof sheets 31 and 33 and the joint sheet T are joined by liquid welding using a solvent. The new waterproof sheets 31, 33 and the joint sheet T may be joined by heat fusion. Further, sealer (not shown) is applied to the edges of the new waterproof sheets 31 and 33 and the joint sheet T. As shown in FIG. The joint sheet T has the same structure and composition as the new waterproof sheet 2 .
Here, when laying a plurality of new waterproof layers, the example shown in Example 3 may be repeated a necessary number of times, and the same repair structure construction method is used on the entire planar portion of the existing waterproof sheet P. be able to.

"Example 4"
When the existing waterproof sheet P is composed of an olefin waterproof sheet, in Example 3, the adhesive is changed from NBR to SBR, and the application of the adhesive is changed to one-sided coating only on the upper surface of the existing waterproof sheet. By doing so, it can be used as a construction method for a repair waterproof structure in the same way.

ADVANTAGE OF THE INVENTION According to this invention, when repairing the existing waterproof sheet which deteriorated with age with a new waterproof sheet, it can be set as the adhesion construction method which prevented generation|occurrence|production of a sound and vibration at the time of repair. In addition, by reducing the risk that the joints of the existing waterproof sheet will break or move, it can be used for a repair waterproof structure and its construction method that can reduce the possibility that a new waterproof sheet will break or wrinkle.

S Substrate P Existing waterproof sheet A Adhesive layer 1 Buffer sheet 2 New waterproof sheet 3 New waterproof layer 4 Joining piece M Joint part of existing waterproof sheet N Joint part T of new waterproof layer Joint part sheet

Claims (5)

an adhesive layer formed by covering the joints of the existing waterproof sheet laid and fixed on the base with an adhesive;
A sheet-like new waterproof layer laid and fixed to the existing waterproof sheet by the adhesive layer,
The new waterproof layer has a buffer sheet adhered to the adhesive layer and a new waterproof sheet laminated and integrated in advance with the buffer sheet ,
A repaired waterproof structure , wherein the new waterproof layer has a joint piece that is the new waterproof sheet portion on which the buffer sheet is not laminated . The repaired waterproof structure according to claim 1, wherein one of the buffer sheets is laid so as to cover the joint. The new waterproof layer has a first new waterproof layer and a second new waterproof layer adjacent to the first new waterproof layer, and a joint portion between the first new waterproof layer and the second new waterproof layer is the second waterproof layer. 3. A repaired waterproof structure according to claim 1 or claim 2, wherein a joint piece of two new waterproof layers is joined onto said first new waterproof layer. The new waterproof layer further has a third new waterproof layer adjacent to the first new waterproof layer,
The third new waterproof layer is laid on an edge portion that is substantially orthogonal to the edge portion having the joint piece of the first new waterproof layer, and the joint portion between the first new waterproof layer and the third new waterproof layer is The repaired waterproof structure according to claim 3, wherein the joint sheet is joined so as to cover it. A step of applying an adhesive so as to cover the joints of a plurality of existing waterproof sheets laid and fixed on the base to form an adhesive layer;
Laying and fixing a plurality of new waterproof layers on the adhesive layer,
The new waterproof layer has a buffer sheet adhered to the adhesive layer and a new waterproof sheet laminated and integrated in advance with the buffer sheet, and the new waterproof layer is not laminated with the buffer sheet. It has a joint piece that is a sheet part,
joining the joining piece of the second new waterproof layer onto the first new waterproof layer at the joint between the first new waterproof layer and the second new waterproof layer adjacent to the first new waterproof layer. Construction method of repair waterproof structure.

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