JP6171150B2 - End treatment method for urethane tarpaulin - Google Patents

Description

  The present invention relates to a method for treating an end portion of a urethane waterproof sheet used for waterproofing a gap between two buildings connected by an expansion joint.

1. When waterproofing the floor (rooftop), etc. on the top floor of a building, methods such as asphalt waterproofing, sheet waterproofing, and urethane coating waterproofing have been taken, and have the following advantages and disadvantages.

(1) Asphalt waterproofing This method is a method of forming a waterproof layer while alternately layering two or three pieces of asphalt roofing (a material in which asphalt is infiltrated into a sheet-like base material) with heat melting. It is a construction method with a track record. Since the waterproof material is asphalt, it has high water-tightness, and there is an advantage that various specifications can be accommodated by adjusting the type of asphalt roofing and the number of stacked sheets. In addition, the accuracy varies depending on the skill level of the operator, but the accuracy can be averaged by overlapping.

  On the other hand, since this method uses asphalt, the waterproof layer is sensitive to changes in temperature, and it is easy to sag in the summer, to harden and break in the winter, and there are also disadvantages that the periphery and the like do not fit well. In addition, since high-temperature asphalt is used during construction, it is necessary to work while ensuring the safety of workers, and there is also a problem that smoke and odor adversely affect the neighborhood.

(2) Rubber sheet waterproofing This construction method is a construction method in which waterproof sheets made of rubber materials having a thickness of about 1 to 2 mm are bonded together with an adhesive to form a waterproof layer. This construction method has the advantage that the quality is stable because the waterproof sheet is molded at the factory, and when using a rubber sheet, it has excellent extensibility and follows even if the ground is cracked. I was able to.

  On the other hand, in this method, there is a disadvantage that it is easy to peel off if there is construction failure in the jointed part of the waterproof sheet, and in the case of using a rubber sheet, in addition, there are convex parts on the ground or due to sharp flying objects There were also disadvantages that were easily damaged.

(3) Urethane coating waterproofing This construction method is a construction method in which a two-component liquid material is mixed and stirred at the time of construction, applied to the base by spraying, etc., and solidified by reaction to form a waterproof layer. is there.

  Since liquid material is applied, it has the advantage of being easy to fit and easy to install even in complicated places such as narrow spaces and rooftops with many equipment foundations. There was an advantage that can be prevented. Moreover, since the waterproof performance can be improved by applying it repeatedly, there is an advantage that the waterproof layer can be repaired at low cost because it is only necessary to apply it at the time of repair.

Furthermore, it is possible to meet specifications for various applications such as increasing friction resistance and impact resistance by selecting a liquid material, and for example, it can be used on a sports ground.
On the other hand, since a liquid material is applied, it is easy to spread horizontally, and if the ground surface is uneven, it cannot be applied to a uniform thickness, and it is difficult to ensure the film thickness. In addition, since the two liquids are agitated and mixed on site, there is also a disadvantage that quality is varied such as uncured if the agitation and mixing are insufficient.

(4) Vinyl chloride sheet floor This method is a method of attaching a vinyl chloride waterproof sheet with urethane and epoxy resin adhesives for the purpose of simple waterproofing, design and slip prevention of open corridors, stairs and verandas of apartment buildings. It is.

  At that time, a waterproof sheet such as vinyl chloride is applied from the top of the groove or rising portion where the waterproof sheet is not applied, up to a range of 10 cm of urethane waterproof material. The waterproof sheet can be applied immediately after applying the adhesive, and on the attached sheet, it is possible to walk without waiting for the adhesive to harden, so there is a period of time when it is closed even in shared areas such as open corridors and stairs. Short and there are few obstacles to the lives of residents.

  However, as with the vinyl chloride sheet waterproofing material, due to deterioration over time, the plasticizer in the sheet becomes hard due to volatilization and shrinkage occurs. As a result, the end portion floats and the joint portion seal is broken. In addition, the surface layer also fades and the design properties are reduced. For this reason, it was necessary to remove the existing waterproof sheet flooring together with the adhesive and reconstruct it.

  Even if any one of the above methods (1) to (4) is adopted, it is necessary to provide anti-scattering curing around the site, and at least a curing curing period of one day is required at each stage. In some cases, it took weeks, and the construction period was prolonged.

2. A water retention pad used for rooftop greening has also been proposed in which foamed urethane is used and the joints are closed with tape (Patent Document 1).
Furthermore, a urethane mat is proposed in which a small-sized urethane sheet B is pasted on the center side of the butyl rubber sheet A, and a woven or non-woven tape is pasted around it. A construction method for waterproofing has been proposed (Patent Document 2).

3. Also, in the drain piping part that continues to the waterproof sheet, for example, a flexible hose made of a bellows-like resin with a flange-like sheet at the upper end is used, and a flexible hose is put in the drain pipe, and the flange-like sheet is attached to the waterproof sheet. (Patent document 3).
Moreover, in order to fix to the concrete floor so that the edge part of a waterproof sheet may not be turned up, the anchor was hit to the concrete frame from the upper surface of the waterproof sheet. That is, the anchor penetrated the waterproof sheet and was driven into the concrete frame. In this case, the anchor was made of steel.

  In these cases, an appropriate treatment method that takes into account secular change has not been established for the treatment of the end portions of the waterproof sheet and the waterproof film.

JP 2002-84889 A Japanese Patent Laid-Open No. 9-131834 JP 2003-113663 A

  Patent Document 1 does not consider waterproofness, and does not consider friction or partial pressurization such as walking of a person. Therefore, applying the waterproof pad of Patent Document 1 directly to a floor surface such as a roof is not possible. could not.

  Moreover, in patent document 2, although the butyl rubber sheet A is previously used as an adhesive with a floor surface at the time of construction, since the urethane mat B is smaller than the butyl rubber sheet A, the urethane mat adjacent to each urethane mat. It is necessary to perform waterproofing on the periphery of B later, and the waterproof performance of the entire surface cannot be exhibited only by placing the urethane mat.

  In addition, in the treatment around the drain pipe of Patent Document 2, a flexible pipe is essential, and the minimum inner diameter of the flexible pipe is remarkably smaller than the inner diameter of the drain pipe, and there is a possibility that the rainwater drainage capacity may be significantly reduced. Therefore, when considering the situation where local heavy rains such as guerrilla heavy rain in recent years occur frequently, a treatment method that does not reduce the drainage capacity has been demanded.

  Moreover, when using an anchor for the edge part process of a waterproof sheet, since the anchor which is a metal is press-fit in concrete, there also existed a possibility that a crack might arise in concrete. In addition, since the metal anchor penetrates the normal waterproof sheet made of resin, there is no followability, and there is a possibility that deformation occurs at the part where the waterproof sheet penetrates. Therefore, in any case, a long-term waterproof layer such as 20 years and 30 years could not be guaranteed. In particular, it was prominent on the vertical and inclined surfaces.

  The object of the present invention is to solve the problems of conventional construction methods using conventional asphalt waterproofing, sheet waterproofing, urethane coating waterproofing, PVC sheet flooring, etc., shortening the curing period in the field, and uniform The end of a urethane waterproof sheet that can be properly treated in consideration of secular change without forming a waterproof layer and using a steel anchor to penetrate the anchor through the waterproof sheet and into the concrete frame It is to provide a processing method.

In order to achieve the above object, the present invention uses one or a plurality of waterproof sheets including a urethane-based waterproofing material layer manufactured in advance in a factory and pasted in the field, with an anchor groove formed in a concrete frame, Primer layer and adhesive layer are applied, and the waterproof sheet has a fixed opening larger than the anchor groove in advance, the waterproof sheet is stacked on the concrete frame, the fixed opening is positioned around the anchor groove, and the overlapping anchor groove and fixed opening It is a urethane waterproof sheet end treatment method in which adhesive resin is injected into the inside and the solidified adhesive resin becomes a solidified resin anchor. It is placed on the horizontal surface of two buildings that are parallel with a gap connected by an expansion joint. The gist is that an anchor groove is formed, a primer layer and an adhesive layer are formed on a horizontal plane, and the resin is cured and fixed.

  In the present invention, a resin waterproof sheet is manufactured in advance in a factory or the like using a concavo-convex molding frame, and the resin waterproof sheet is laminated on the site, so that preparation for ensuring stable quality can be performed. This has the effect of significantly reducing on-site work, such as curing for preventing splashing and curing periods waiting for hardening.

  In addition, since the resin waterproof sheet can be formed with a certain thickness, according to the required waterproof performance, the optimal amount of waterproof material can be used without waste, various uneven patterns are formed on the bottom of the uneven molding frame, A waterproof sheet having various functions can also be configured.

  In addition, when forming a topcoat layer on the resin waterproof sheet, it is possible to form an arbitrary finished color pattern, an arbitrary surface pattern or some uneven pattern on the surface of the resin waterproof sheet in advance with an uneven molding frame, There is an effect that an arbitrary function and decoration can be given. Furthermore, since the high-quality urethane waterproof layer hardly changes over time, it can be applied without being removed at the time of refurbishment, and this can also prevent the generation of waste materials.

  In the present invention, the anchor is not used for the end treatment of the waterproof sheet, and the metal anchor is not press-fitted into the concrete, so that there is no possibility of cracking in the concrete.

  Moreover, since the metal anchor does not penetrate the normal resin waterproof sheet, the followability is good, and there is no possibility that deformation occurs at the portion where the waterproof sheet penetrates. Therefore, in any case, it is possible to guarantee a long-term waterproof layer such as 20 years and 30 years, and this is particularly remarkable on a vertical surface or an inclined surface.

It is a side view before a waterproof sheet attachment in one Embodiment of the edge part processing method of the urethane waterproof sheet of this invention. It is a side view after a waterproof sheet attachment in 1 embodiment of the edge part processing method of the urethane waterproof sheet of this invention. It is sectional drawing in the DD line | wire of FIG. It is a longitudinal cross-sectional view of the fixed form waterproof sheet used for implementation of this invention. It is a longitudinal cross-sectional view showing the manufacturing process of the waterproof sheet used for implementation of this invention.

  The waterproof sheet 10 used in the present invention will be described. The waterproof sheet 10 has a configuration in which a plurality of layers are formed over the entire surface (FIG. 4).

  The waterproof sheet 10A in which the top coat layer 30 is formed in advance is used (FIGS. 4A and 4B).

1. Manufacture of waterproof sheet 10A

(1) The concave mold frame 20 for manufacturing the waterproof sheet 10A is arranged on the upper surface (flat surface) 22 of the plate-like base 21, and the crosspieces 25 and 25 are arranged in a frame shape to match the shape of the waterproof sheet 10A. A recess 23 is formed (FIG. 5A). The crosspiece 25 is formed in the rectangular or square cross-sectional shape according to the thickness of 10 A of waterproof sheets to manufacture.

(2) The bottom 24 of the recess 23 (the upper surface 22 of the base 21. Flat surface) is formed with a concavo-convex pattern in accordance with the surface 11 of the waterproof sheet 10A to be used. In this case, the concavo-convex pattern is a pattern with various conventional functions such as a pattern that can easily drain the accumulated water to the parapet 3, 3 side, a pattern that is not slippery, a pattern that can exhibit water repellency, a pattern that promotes evaporation, or simply a decoration. The pattern can be freely formed according to the purpose.

(3) Prepare the concave molds 20 and 20 having the plane L ₁ × L _{2 of} the recess 23 and the height (thickness) t of the recess 23 in advance at the factory, and _first apply a release agent in the recess 23. Thereafter, a top coat agent is applied in the recess 23 to form the top coat layer 30 (FIG. 5B).

  In this state, the surface of the top coat layer 30 (surface facing upward) is formed with a substantially uniform film thickness. The top coat agent used here has a main function of preventing deterioration of the urethane waterproofing agent at the time of use, for example, a material having an ultraviolet ray prevention function (for example, “Cosmic Top UV” of Uplex Co., Ltd.). use. Further, the color and the planar pattern of the top coat layer 30 can be freely formed.

  Subsequently, when the topcoat layer 30 is dried, a high-quality urethane waterproofing agent 31 is sprayed on the surface of the topcoat layer 30 to form a high-quality urethane waterproofing layer 31 (FIG. 5C). The high-quality urethane waterproofing agent to be injected is a type in which a normal two-component base and a curing agent are collided and sprayed. As a high-quality urethane waterproofing agent, for example, “Cosmic RIM S200” from Uplex Co., Ltd. is used. A high-quality urethane waterproofing agent has a certain degree of fluidity, and thus is cured after spraying while maintaining a flat surface.

  Subsequently, when the high-quality urethane waterproof layer 31 is dried, a general-purpose urethane waterproof agent in which various kinds of increasing components are mixed into the urethane base material is poured into the surface side of the high-quality urethane waterproof layer 31, and the general-purpose urethane waterproof layer 32. Is formed (FIG. 5D). As a general-purpose urethane waterproofing agent, for example, “Cosmic PRO12” from Uplex Co., Ltd. is used. A general-purpose urethane waterproofing agent is cured while maintaining a flat surface by self-leveling.

(4) Subsequently, when the general urethane waterproof layer 32 is dried, it is removed from the mold and filled into the recesses 23 (the top coat layer 30, the high-quality urethane waterproof layer 31 and the general urethane waterproof layer 32). If the laminate is turned upside down, from the top surface 11 to the back surface 12 during use,
Topcoat layer 30 Thickness t ₁ = 0, 2-0.3 mm (unevenness)
High quality urethane waterproof layer 31 Thickness t ₂ = 1-3mm
Urethane waterproof layer 32 for general use Thickness t ₃ = 1-5mm
The urethane waterproof sheet 10A formed in three layers over the entire surface (the end edges 20a, 31a, and 32a of each layer are aligned) is formed.

(5) Other examples of the waterproof sheet 10

  In the above description, the crosspiece 25 having a square or rectangular cross section is used. However, an inner side surface 25a of the crosspiece 25 is formed so that an opening spreads from the bottom 24 around the recess 23 using a crosspiece formed in a trapezoidal shape or the like. It is also possible to form an inclined surface (see FIG. 5A). Similarly, reverse slopes are possible.

  In the above, the top coat layer 30 located on the surface 11 (the uppermost surface) is formed in use (FIG. 5), but in general from the bottom 24 in the recess 23, the general urethane waterproof layer 32, the high quality urethane waterproof layer. 31 and the topcoat layer 30 can be laminated and removed (not shown). In this case, when various uneven patterns are formed on the top coat layer 30, the pattern can also be formed on the surface of the top coat layer 30 that has not yet hardened by rolling or the like.

  In addition, in the above, the fixed concave mold frame 20 may have a structure in which one concave portion 23 is formed, or a plurality of (two, four, twelve, etc.) concave portions 23, 23 are formed. It can also be a structure (not shown).

In addition, in the above, the waterproof sheet 10 has a rectangular shape with one side L ₁ × L ₂ (for example, L ₁ = 1 m, L ₂ = 2 m), but if it can be continuously arranged, such as a square, a triangle, or a hexagon, Is optional (not shown).

  Moreover, in the above, the waterproof layer was formed from two layers of the high-quality urethane waterproof layer 31 and the general urethane waterproof layer 32, but the waterproof layer can be formed from any one layer (FIG. 4 (b)), In this case, it is desirable to form the high quality urethane waterproof layer 31.

  Moreover, in the said Example, although material was poured into the bottom 24 of the recessed part 23 and each layer 30, 31, 32, etc. were formed, the crosspieces 25, 25 were abbreviate | omitted and it was on a somewhat wide plane (it has only the bottom 24). The material is poured, the respective layers 30, 31, 32, etc. are laminated in the same manner, the peripheral portion (the position where the crosspieces 25, 25 will be formed) is cut, and the waterproof sheets 10A, 10B having a predetermined thickness are cut. Etc. can also be manufactured (not shown). In addition, if the peripheral part has gathered to some extent, a cutting | disconnection is also unnecessary.

  Based on FIGS. 1-3, the process of the edge part of waterproof sheet | seat 10A, 10B of this invention is demonstrated. The waterproof sheet 10A (10B) is attached above the joints of the two buildings 72A and 72B connected by the expansion joint.

  When connecting two buildings 72A, 72B with different vibration characteristics such as different building structures and foundations, an expansion joint is provided with a gap 73 of about 20 to 100 mm and structurally cut to allow for expansion and contraction of the gap 73 It was connected with. In this case, the gap 73 may be provided with various covers so that the expansion joint cannot be seen, or the rubber material may be loosened in the gap 73. The gap 53 is usually outdoors, and a waterproof treatment near the top may be required.

  Thus, in this embodiment, the upper portion of the gap 73 in the expansion joint portion is covered with the waterproof sheet 10A (10B) at the ends of the two buildings 72A and 72B.

(1) Buildings 72A and 72B are juxtaposed with a gap 73 therebetween. Anchor grooves 51 are respectively formed in the horizontal planes 9 of the buildings 72A and 72B in the vicinity of the gap 73 (FIG. 1).

(2) The primer layer 41 and the adhesive layer 43 are formed on the horizontal plane 9, and if necessary, the primer layer 41 and the adhesive layer 43 are formed in the anchor groove 51, the vertical surface 8 and the chamfered portion 8a. Thereafter, the waterproof sheet 10A (or 10B) is attached so as to cover the upper portion of the gap 73, and the end portions 10a and 10a of the waterproof sheet 10A are inserted into the anchor grooves 51 and 51, respectively, and an epoxy resin is inserted into the anchor groove 51. 67 is filled.

  In this case, the communication holes 13 and 13 are formed in the end portions 10a and 10a of the waterproof sheet 10A, and the filled epoxy resin goes around the communication holes 13 and 13 and is firmly fixed when the epoxy resin is cured. (FIG. 2).

(3) In the above, after inserting and hardening the end portion 10a of the waterproof sheet 10A into the anchor groove 51 of one building 72A (or 72B) first, the anchor of the other building 72B (or 72A) The end portion 10a of the waterproof sheet 10A can be inserted into the groove 51 and fixed.

(4) It should be noted that this end treatment can be similarly applied to conventional waterproof sheets other than the waterproof sheets 10A and 10B (not shown).

  Further, in this case, the waterproof sheet 10 (10A, 10B) is integrally formed with the insertion portion (functional member) 19 up to the edge 10a toward the lower side continuously to the portion disposed on the horizontal plane 9 and covering the gap 73. It is also possible to pre-configure the shape of FIG. 2 by molding (FIG. 2).

(5) Moreover, although it applied to the two buildings 72A and 72B connected by the expansion joint, it is applicable also to the structure which has the clearance gap 73 similarly (not shown). For example, when applied to buildings 72A and 72B such as station buildings, factories, and roads that are constantly subjected to vibrations, waterproofing can be efficiently performed in consideration of the effect of quick drying of the epoxy resin adhesive.

10 Waterproof sheet 10A Waterproof sheet (with top coat layer)
10B waterproof sheet (no topcoat layer)
DESCRIPTION OF SYMBOLS 11 Surface of waterproof sheet 12 Bottom surface of waterproof sheet 13 Communication hole 20 of waterproof sheet Concave mold 21 Base of concave mold 22 Upper surface of base 23 Concave part of concave mold 24 Bottom of concave part 25 Cross member 25a Inner side surface 30 of cross member Topcoat layer 30a of waterproof sheet Edge 31 of topcoat layer High quality urethane waterproof layer of waterproof sheet (first waterproof layer)
31a Edge of high quality urethane waterproof layer 32 Urethane waterproof layer for general use of waterproof sheet (second waterproof layer)
32a Edge of general urethane waterproof layer 41 Primer layer 43 Adhesive layer 45 In-situ waterproof layer 47 Top coat layer 51 Anchor groove 53 Fixed opening (waterproof sheet)
55 Solidified resin anchor 57 Base material 73 Gap between buildings (above the expansion joint)
74A Upper floor 74B of base isolation structure Lower floor 75 of base isolation structure Clearance 76 Gasket 80 庇 81 Standing wall

Claims (1)

It uses one or more waterproof sheets including a urethane-based waterproof material layer that is manufactured in advance at the factory and applied on-site.
An anchor groove is made in the concrete frame, a primer layer and an adhesive layer are provided, and the waterproof sheet has a fixed opening larger than the anchor groove in advance, and the waterproof sheet is overlaid on the concrete frame, and the fixed opening is positioned around the anchor groove. In the end treatment method of urethane waterproof sheet, the adhesive resin is injected into the overlapping anchor groove and fixed opening, and the solidified adhesive resin becomes the solidified resin anchor,
Anchor grooves are formed on the horizontal planes of two buildings that are arranged in parallel with a gap connected by an expansion joint, and a primer layer and an adhesive layer are formed on the horizontal plane, and the resin is cured and fixed. A method for treating an end portion of a urethane waterproof sheet.

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