JP2007198121A - Sheet waterproof repairing method and sheet waterproof repair structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet waterproof repairing method, which is used for a repair wherein a degraded existing waterproof sheet is left as it is and a new waterproof sheet is laid thereon, by which the newly provided waterproof sheet is laid over the existing waterproof sheet securely fixed and which has no problem in peeling and tearing even when blasted by a strong wind. <P>SOLUTION: The sheet waterproof repairing method is provided for repairing an existing waterproof sheet 2 laid over a backing 5, wherein the existing waterproof sheet 2 is fixed with a fixing plate 3 and an anchor member 4 and then a new waterproof sheet 1 is arranged thereon and bonded/fixed with an adhesive. Also, a new waterproof sheet 1 having an insulating sheet laminated can also be used. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a sheet waterproofing repair method applied when attempting to lay a new waterproof sheet in accordance with deterioration of an existing waterproof sheet in a waterproof structure such as a rooftop of a building or a parking lot, and more specifically, an existing waterproof layer The present invention relates to a repair method and a repair structure that can easily perform the repair work in a short period of time and can reduce the generation of waste due to the repair.

  As a method of waterproofing the concrete base on the rooftop of a building or parking lot, waterproofing is achieved by attaching the entire surface of a waterproof sheet made of an elastomer material such as rubber, polyurethane, or other resin to the surface of the base with an adhesive. There is a close contact method to ensure.

  In such a waterproof structure in which the entire surface of the waterproof sheet is adhered to the base with an adhesive, the waterproof sheet is made of a material having excellent physical properties such as weather resistance, and waterproof performance over a long period of time However, it is unavoidable that the waterproof sheet will deteriorate due to exposure to wind and rain for many years and exposure to the sun's ultraviolet rays. I need it.

  When repairing such a waterproof structure, the existing waterproof sheet attached to the base is not only deteriorated, but also the adhesive strength between the existing waterproof sheet and the base is reduced. Since there is a possibility, peel off the entire surface of the existing waterproof sheet from the base, clean the surface of the base, etc., and then apply an adhesive to the entire surface of the base to apply a new waterproof sheet to the entire surface of the base. The method of re-pasting is common.

  However, when peeling off the existing waterproof sheet over the entire surface in this way, it takes a lot of labor and time to remove the waterproof sheet in a structure where the waterproof area is very large, and the repair work takes several days. It will be over. Thus, if the renovation work takes a long time, there is a possibility that there will be rain during that period, and there is a possibility that rain leakage may occur if the groundwork is not waterproof. The peeled existing waterproof sheet must be disposed of as industrial waste. However, if the existing waterproof sheet is peeled over the entire surface, the amount of disposal increases, resulting in problems from the environmental viewpoint.

  The existing tarpaulin is not removed or partially removed, and a new tarpaulin is laid on the existing tarpaulin so that the work of removing the existing tarpaulin can be omitted and the generation of waste can be reduced. it can. For example, Patent Document 1 discloses that an existing waterproof sheet is partially removed and then a new waterproof sheet is laid thereon. The new waterproof sheet is fixed to the base using a new fixing tool.

  Further, in Patent Document 2, as a method of repairing a waterproof structure in which a sheet is closely fixed to an underlayer with an adhesive, the existing waterproof sheet is partially peeled off, and the exposed underlayer and the remaining existing waterproof sheet are adhered using an adhesive. A method of fixing is disclosed.

Japanese Patent Laid-Open No. 10-61207 JP 2002-364125 A

  According to the method of Patent Document 1, the effort to remove the existing waterproof sheet is certainly reduced, the amount of waste can be reduced, and the influence from the existing waterproof sheet can be blocked by the insulating sheet. However, since the existing waterproof sheet is partially removed, it cannot be said that there is no hassle. Moreover, when the existing waterproof sheet is an adhesion method in which the entire surface is attached to the base with an adhesive, it is difficult to remove the existing waterproof sheet.

  Further, the method of Patent Document 2 can be repaired even in the case of a waterproof sheet laid and adhered by a close-contact method, but there is a problem that it takes time to remove the existing waterproof sheet. However, the strength of the existing waterproof sheet has decreased during long-term use, and even if it is difficult, it is necessary to partially peel off the existing waterproof sheet to secure a portion where the new waterproof sheet is directly bonded to the ground.

  Therefore, in the present invention, the waterproof sheet used for the renovation of laying a new waterproof sheet on top of the existing waterproof sheet is retained, and the reduction in strength is reinforced even in the case of the waterproof sheet laid and adhered by the close-contact method. It is an object of the present invention to provide a waterproof sheet renovation method that can be performed.

  In order to solve the problems as described above, in claim 1 and claim 5 of the present invention, in the waterproof waterproof sheet method or the waterproof waterproof structure in the waterproof structure in which the waterproof sheet is already installed on the base by the adhesion method, Place a fixing plate on the existing waterproof sheet, insert the anchor member into the base through the fixing disk and the existing waterproof sheet, fix it at multiple locations, and then lay the new waterproof sheet on it and fix it to the existing waterproof sheet It is characterized by doing.

  In Claim 2 and Claim 6, it is set as the sheet | seat waterproof repair method or the sheet | seat waterproof repair structure which reinforced the existing waterproof sheet by arrange | positioning a reinforcing material in the location which arrange | positions the fixing plate of an existing waterproof sheet.

  In Claim 3 and Claim 7, it is set as the sheet | seat waterproofing repair method or sheet | seat waterproofing repair structure whose reinforcing material is a fiber reinforcement.

  The sheet waterproof repair method or the sheet waterproof repair structure according to claim 4 or 8, wherein the reinforcing material is a fiber reinforced rubber sheet.

  In Claim 1 and Claim 5, when the fixing plate is arranged from above the existing waterproof sheet and the anchor member is inserted into the base and fixed at a plurality of locations, the adhesive strength of the existing waterproof sheet to the base is reduced However, it is possible to reinforce, and by laying a new waterproof sheet on it and bonding and fixing it, the new waterproof sheet can be firmly fixed without the need to remove the existing waterproof sheet.

  In Claim 2 and Claim 6, the reinforcing material is arrange | positioned in the location which arrange | positions the fixed plate of the existing waterproof sheet, and when the negative pressure is applied to the waterproof sheet, the existing waterproof sheet is formed at the boundary of the portion pressed by the fixed plate. Can be prevented from tearing.

In Claims 3 and 7, a fiber reinforcing material is used as the reinforcing material, and it is possible to prevent tearing of the existing waterproof sheet and to suppress elongation and deformation.
According to Claims 4 and 8, a fiber-reinforced rubber sheet is used as the reinforcing material, and it is possible to prevent tearing and deformation of the existing sheet, and it is also possible to easily attach to the existing sheet. There are advantages.

  FIG. 1 is a side view of an essential part where the sheet waterproofing repair method of the present invention is applied. The renovation of waterproof structure in the present invention means that a waterproof sheet made of an elastomer material such as rubber or resin is laid on the foundation of a building such as a building or a parking lot. It is said that laying down and redoing waterproofing work. Moreover, the waterproof sheet structure targeted by the present invention is based on a close contact method in which the entire surface of the waterproof sheet is bonded and fixed to the base with an adhesive.

  Since the existing waterproof sheet 2 has been used for many years, the waterproof sheet itself has deteriorated, and the adhesive bonding the waterproof sheet to the ground has also deteriorated and has not been able to exert sufficient adhesive force. Even if the new waterproof sheet 1 is laid and bonded from above, the existing waterproof sheet 2 will be peeled off.

  Therefore, in the present invention, the existing waterproof sheet 2 is first securely fixed to the base. Specifically, the fixing plate 3 is disposed on the existing waterproof sheet 2, and the anchor member 4 and the existing waterproof sheet 2 are further penetrated from the fixing plate 3 to be inserted into the base 5 and mechanically fixed.

  Next, the newly installed waterproof sheet 1 is laid from above, and the entire sheet is adhered and fixed to the existing waterproof sheet 2 with an adhesive. By doing so, even if the adhesive fixing of the existing waterproof sheet 2 to the base 5 is deteriorated, it is fixed again by the fixing plate 3 and the anchor member 4 in the repair, and the new waterproof sheet 1 is firmly fixed to the base 5 It will be possible.

  In addition, the existing waterproof sheet 2 that is mechanically fixed by the fixing plate 3 when the waterproof sheet is beaten by a normal strong wind has a large force at the boundary between the portion pressed by the fixing plate 3 and the portion not pressed. There is a problem that tearing is likely to occur.

  In the case of the present invention, it is considered that the adhesion of the existing waterproof sheet 2 to the base 5 has deteriorated over a long period of time, and when the adhesive force is completely lost, the burden caused by being blown by a strong wind is fixed. It is possible that all of the material will come to the boundary between the part that is pressed by the plate and the part that is not pressed, and that the part will tear. Therefore, the reinforcing material 6 is arranged at a place where the fixing plate 3 of the existing waterproof sheet 2 is arranged. By doing so, it is also effective to reinforce the existing waterproof sheet 2 and prevent the occurrence of tearing.

  The existing and new waterproof sheets 2 and 1 that can be used in the present invention may be any waterproof sheet as long as it is usually used for sheet waterproofing, and the material is not particularly limited, but ethylene propylene diene monomer (EPDM), Examples include rubbers such as butyl rubber, isoprene / isobutylene copolymer (IIR) and blends thereof, synthetic resins such as polyurethane, polyethylene and polyvinyl chloride, and sheets made of olefinic thermoplastic elastomers. EPDM having excellent weather resistance and good rubber elasticity is preferred. The thickness is preferably in the range of 0.8 to 2.5 mm. Moreover, the width | variety of about 1-2 m is normally used. If the thickness is less than 0.8 mm, the waterproof sheet may be easily broken due to insufficient strength, and if it exceeds 2.5 mm, the step becomes large at the joint and the appearance may be deteriorated. Absent. In addition, it is also possible to use a material in which a reinforcing cloth made of glass fiber or polyester fiber is embedded in these rubbers to improve mechanical strength and dimensional stability.

  In the present invention, the new waterproof sheet 1 is laid on the existing waterproof sheet 2 without removing the existing waterproof sheet 2. However, when the new waterproof sheet 1 is laid on the existing waterproof sheet 2 without removing the existing waterproof sheet 2, the existing waterproof sheet 1 is installed. There is a problem that chemical components from the sheet 2, for example, tar components in the asphalt sheet and plasticizer components in the vinyl chloride sheet migrate to the newly installed waterproof sheet 1 and deteriorate.

  Therefore, as shown in FIG. 2, an insulating sheet 7 made of a thermoplastic resin film or the like can be laminated and integrated on the lower surface of the newly installed waterproof sheet 1 (the side in contact with the existing waterproof sheet). By doing so, the chemical component from the existing waterproof sheet 2 can be blocked from moving to the new waterproof sheet 1 side, and the new waterproof sheet 1 can be protected.

  The insulating sheet 7 to be laminated and integrated includes polyethylene, polypropylene, ethylene vinyl acetate, ethylene methyl acrylate, ethylene methyl acrylate, etc., olefin resins, modified olefins such as chlorinated polyethylene, chlorinated polypropylene, maleated ethylene vinyl acetate, etc. Resins, olefinic thermoplastic elastomers, and the like can be used, and sheets of 50 to 500 μm thickness, more preferably 150 to 250 μm are laminated. If the thickness is less than 50 μm, the strength due to heat fusion decreases due to the insulating sheet 7 not being aligned with the pattern on the surface of the sheet, and if it exceeds 500 μm, the newly formed waterproof sheet 1 due to the difference in thermal shrinkage with the waterproof sheet 2. It is not preferable because a large warp is generated, and the flexibility of the newly-installed waterproof sheet 1 is lost and it becomes difficult to follow the base or the workability is deteriorated.

  As a method of laminating and integrating the new waterproof sheet 1 and the insulating sheet 7, a method using heat fusion or an adhesive may be considered. However, by heat fusion, it can be firmly laminated and integrated. . Specifically, the new waterproof sheet 1 and the insulating sheet 7 can be laminated and integrated by heat fusion by heating and pressurizing with a heat roll or the like. Further, in the heated state shortly after vulcanizing the new waterproof sheet 1, the insulating sheet 7 is laminated and fused using the heat generated when the new waterproof sheet 1 is vulcanized.

  Specifically, using an apparatus as shown in FIG. 4, an unvulcanized rubber sheet extruded from an extruder (not shown) is placed on the endless belt 21 and a predetermined temperature (150 to 200 ° C.) from the introduction roll 22. Insulating sheet 7 is laminated and integrated with pressure contact roll 26 via a plurality of guide rolls sent out from vulcanization can 23 through derivation roll 24 and vulcanized. Then, it is wound around the winding roll 29 via the tension roll 28.

  At this time, the new vulcanized rubber waterproof sheet 1 just sent out from the vulcanizing can 23 has a surface of 130 to 150 ° C., and the thermoplastic sheet can be easily fused.

In order to ensure the fixing of the existing waterproof sheet 2 to the ground, the fixing plate 3 is driven by the anchor member 4, and the fixing plate 3 is arranged at a predetermined interval. The number of fixing plates 2 to be arranged is not particularly determined depending on the state of the base 5, but even if the adhesive is completely deteriorated and loses the adhesive force, the existing waterproof sheet 2 is winded. It is necessary to be sufficiently fixed to the base 5 so as not to be lifted due to the influence of the above, and it is usually arranged uniformly in a range of about 1 to 4 pieces / m ² .

  The fixing plate 3 of the present invention is made of metal such as stainless steel, galvanized steel plate, galvanium steel plate, hot-dip aluminum plated steel plate, cold rolled stainless steel plate, aluminum plate, aluminum alloy plate, fiber reinforced resin, or the like. It has a shape such as a circle, a square, or a rectangle with a diameter of about φ60 to 100 mm.

  The thickness of the fixing plate 3 varies depending on the type of metal used, but a thickness of about 0.4 to 2.0 mm is usually used. If the thickness is less than 0.4 mm, the rigidity is low, and if it exceeds 2.0 mm, the workability becomes poor and the weight increases. In particular, when stainless steel is used, a thickness of 0.5 to 1.0 mm is most preferable. If it is stainless steel, sufficient rigidity can be obtained in this range, and it can be easily cut with a metal cutting scissor, and the processing at the time of construction is also easy.

  In addition, as an adhesive used to bond the existing and new waterproof sheets 2, 1 and the base 5 or the existing waterproof sheet 2 and the new waterproof sheet 1, chloroprene rubber, butyl rubber and other additives are dissolved in a solvent or water. Adhesives can be used.

  Examples of the reinforcing member 6 arranged to prevent tearing of the existing waterproof sheet 2 include a fiber reinforcing material and a fiber reinforced rubber sheet. The fixing plate 3 can be arranged on the upper side so that the fixing plate 3 can be arranged on the upper side. Further, it has a slightly larger area and is used by adhering to the existing waterproof sheet 2 using the above-mentioned adhesive or the like. As the material for the fiber reinforcement, various fibers such as plain weave such as polyester fiber, glass fiber, polyethylene fiber, twill weave, satin weave can be used. As well as rubber such as ethylene propylene diene monomer (EPDM), butyl rubber, isoprene / isobutylene copolymer (IIR) and their blends, synthetic resins such as polyurethane, polyethylene, polyvinyl chloride, olefinic thermoplastic elastomers, etc. The thickness of the sheet is in the range of about 0.8 to 2.5 mm, and the reinforcement strength made of glass fiber or polyester fiber is embedded in the rubber to increase the mechanical strength. Can be used. These reinforcing materials are laminated and bonded with an adhesive at a place where the fixing plate 3 of the existing waterproof sheet 2 is arranged, or are fused and arranged by means such as heat fusion.

  The present invention is used as a sheet waterproofing method or structure that can be laid from the top without removing the existing waterproofing layer when renovation work is performed due to deterioration of the waterproofing layer applied to the rooftop in a building or the like. Can do.

It is sectional drawing when the newly installed waterproof sheet of this invention was laid. It is sectional drawing of the newly installed waterproof sheet which laminated | stacked the thermoplastic resin film on the lower surface. It is sectional drawing which shows another form of a waterproof sheet. It is an outline explanatory view of a place where a thermoplastic sheet is pressure-bonded in a vulcanization process of a waterproof sheet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Newly installed waterproof sheet 2 Existing waterproof sheet 3 Fixed plate 4 Anchor member 5 Base 6 Reinforcing material 7 Insulating sheet

Claims (8)

  In the waterproofing method for waterproofing in waterproof structures where the waterproof sheet is already installed on the base, the fixing plate is placed on the existing waterproof sheet, and the anchor member is inserted into the base through the fixing disk and the existing waterproof sheet. The sheet waterproofing repair method characterized in that it is fixed at a plurality of locations, and a new waterproof sheet is laid from above and adhesively fixed to the existing waterproof sheet.   The sheet waterproofing repair method according to claim 1, wherein the existing waterproof sheet is reinforced by disposing a reinforcing material at a position where the fixing plate of the existing waterproof sheet is disposed.   The sheet waterproofing repair method according to claim 2, wherein the reinforcing material is a fiber reinforcing material.   The sheet waterproofing repair method according to claim 2, wherein the reinforcing material is a fiber reinforced rubber sheet.   In a waterproof structure for waterproofing in waterproof structures where the waterproof sheet is already installed on the base, the fixing plate is placed on the existing waterproof sheet, and the anchor member is inserted into the base through the fixing disk and the existing waterproof sheet. A waterproof structure for waterproofing seats, which is fixed at a plurality of locations, and a new waterproof sheet is laid from above and bonded to an existing waterproof sheet.   The sheet waterproof repair structure according to claim 5, wherein the existing waterproof sheet is reinforced by disposing a reinforcing material at a position where the fixing plate of the existing waterproof sheet is disposed.   The waterproof waterproof structure according to claim 2, wherein the reinforcing material is a fiber reinforcing material.   The sheet waterproofing improved structure according to claim 2, wherein the reinforcing material is a fiber reinforced rubber sheet.

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