JP2005066550A - Water-blocking-sheet fixing structure on wall surface and fixing method of the sheet on wall surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-blocking-sheet fixing structure which can block water in an insulation method without making a through-hole in a water-blocking sheet and firmly fix the sheet by thermal fusion. <P>SOLUTION: In the fixation structure of the water-blocking sheet 4 in which the expected position of the water-blocking sheet 4 is fixed to a base 1, a fixing plate 5, which comprises a conductive body formed by laminating and bonding coating materials 6 on a surface on a side contacting at least the water-blocking sheet 4, is anchored to a wall surface, and the fixing plate 5 is heated by electromagnetic induction heating in a state in which the water-blocking sheet 4 is overlapped on the fixing plate 5 to melt the coating materials 6 to fix the water-blocking sheet to the wall surface. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a water shielding structure for forming a water shielding layer on a concrete retaining wall and the like, and in particular, a water shielding sheet in a mechanical fixing method capable of fixing a water shielding sheet without being affected by the state of an existing retaining wall. The present invention relates to a wall surface fixing structure and a fixing method thereof.

  When laying a water shielding sheet at a waste disposal site, etc., when a retaining wall such as concrete stands up against the ground, the water shielding sheet is raised and fixed on the wall. .

  Conventionally, the impermeable sheet is fixed to the wall surface by the following method. When the material of the water shielding sheet is an asphalt sheet, a primer is applied to the concrete wall and then fused using a burner or the like. In the case of a rubber sheet, an adhesive layer is placed on the surface of the sheet in advance, and the release paper is peeled off at the site and bonded using the adhesive layer. In the case of a polyethylene sheet, it is fixed by a method such as fixing with a plate from the top of the sheet or sticking to a wall surface with an adhesive tape.

  However, in the case of a close contact method such as fusing or bonding with an adhesive material such as the above asphalt sheet or rubber sheet, it is greatly affected by the condition of the wall surface, and it is difficult to fuse if the wall surface contains moisture, There was a problem that the adhesive did not work, which sometimes led to the work schedule being upset or not being sufficiently fixed.

  Patent Document 1 has a structure in which a protective mat is laid on a wall surface, a water shielding sheet is laid, a metal plate is applied from above and a pin-shaped anchor is driven and fixed.

  Patent Document 2 adopts a structure in which a water-impervious sheet having an uneven surface on one side is used to be fitted and fixed to the unevenness formed on the wall surface.

JP 2003-154328 A Japanese Patent Laid-Open No. 11-124933

  When asphalt sheets or rubber sheets are affixed to a wall surface using a close-contact method, as described above, construction may not be possible due to the weather being greatly affected by the condition of the wall surface, and it may be complicated and affixed. In some cases, it was necessary to take time to cure even after the work was over.

  On the other hand, the methods described in Patent Document 1 and Patent Document 2 have another problem although they are not influenced by the weather or the state of the wall as in the close contact method. In the method of Patent Document 1, since the water-impervious sheet is penetrated by a pin-shaped anchor for fixing, the water-impervious sheet, which is the original purpose of the water-impervious sheet, is greatly negative.

  Further, in the method described in Patent Document 2, it is necessary to provide the wall surface and the water-impervious sheet with unevenness to be fitted in advance, which takes time for processing and is somewhat disadvantageous in terms of cost.

  Therefore, in the present invention, it does not depend on the state of the wall surface at the time of laying, does not make a through hole in the water shielding sheet, and does not require much labor for the installation and fixing work of the water shielding sheet. An object of the present invention is to provide a wall fixing structure for a water shielding sheet that can be fixed by the above-described method and is advantageous in terms of cost.

  In order to achieve the above-described object, in claim 1 of the present invention, in the wall-fixing structure of the water-impervious sheet that lays and fixes the water-impervious sheet to the wall standing up against the base, at least the water-impervious sheet and Fixing by fixing the fixing plate made of the conductor with the covering material laminated and bonded to the surface on the contact side to the side wall, and by electromagnetic induction heating from above the water shielding sheet with the water shielding sheet superimposed on it The water shielding sheet is fixed by heating the plate, melting the covering material, and fusing the water shielding sheet and the fixing plate.

  The water-shielding sheet wall surface fixing structure according to claim 1, wherein a thermoplastic sheet is laminated and fused at least at a location where the water-shielding sheet is thermally fused with at least a fixing plate.

  In Claim 3, it is the wall surface fixing structure of the water shielding sheet of Claim 2 whose thickness of a thermoplastic sheet is the range of 30-300 micrometers.

  According to a fourth aspect of the present invention, the fixed plate includes a plate body having one or more through holes and a covering material covering the front and back surfaces of the plate body, and the covering materials on the front and back surfaces are connected at least through the through holes of the plate body. It is the wall surface fixing structure of the impermeable sheet of Claims 1-3.

  Similarly, in the method of fixing the wall surface of the water shielding sheet that lays and fixes the water shielding sheet to the wall standing up against the base, the fixing is made of a conductor in which a covering material is laminated and bonded to at least the surface in contact with the water shielding sheet. The plate is anchored to the side wall, and with the water-impervious sheet superimposed on it, the fixed plate is heated by electromagnetic induction heating from above the water-impervious sheet, and the covering material is melted and fixed to the water-impervious sheet. The water shielding sheet is fixed by fusing the plate.

  Since it is mechanically fixed by adopting the configuration as in the present invention, it can be carried out at any time without being greatly affected by the weather and wall surface condition during laying, and a hole is made in the water shielding sheet. Therefore, the possibility of water leakage is small, and furthermore, fixing can be performed by heat fusion using a normal water shielding sheet, so that the fixing operation is simple and advantageous in terms of cost.

  FIG. 1 is a schematic cross-sectional view showing an example of a waste disposal site that implements a wall fixing structure for a water shielding sheet according to the present invention, and FIG. 2 shows details of the wall fixing structure for a water shielding sheet according to the present invention. It is sectional drawing.

First, a fixing plate 2 is fixedly arranged at a predetermined interval by an anchor member 3 on a wall surface 1 made of concrete or the like on which a water shielding sheet is to be laid. The number of the fixing plates 2 to be arranged is not particularly determined depending on the state of the ground 1, but is sufficiently fixed to the wall surface 1 so that the water shielding sheet 4 does not rise due to the influence of wind or the like. that it must usually be evenly arranged with 1-4 / m ² range of about.

  After the fixing plate 2 is disposed, the water shielding sheet 4 is then disposed so as to cover it. The water-impervious sheet 4 is formed by jointing sheets having a width of 1 to 2 m to form a water-impervious sheet 4 having an area in the field and arranged on the entire surface.

  As shown in FIG. 3, the surface of the fixing plate 2 is covered with a thermoplastic coating material, and is overlapped with the water shielding sheet 4. The wall fixing structure of the water shielding sheet of the present invention is obtained by fusing and fixing the fixing plate 2 without opening a hole in the water shielding sheet 4 by heating the plate body 5 made of metal and melting the coating material 6 on the surface. Become.

  What is used as a raw material of the water shielding sheet 4 used in the present invention is ethylene propylene diene monomer (EPDM), isoprene / isobutylene copolymer (IIR), polyvinyl chloride (PVC), polyethylene (PE), olefin-based thermoplastic. An elastomer, ethylene vinyl acetate and the like can be mentioned, and EPDM having excellent weather resistance and excellent rubber elasticity is preferable.

  As the thickness of the water-impervious sheet 4, a thickness of about 0.8 to 3.0 mm is used. If the thickness is less than 0.8 mm, the strength is insufficient, and if the thickness exceeds 3.0 mm, the level difference becomes too large at the joint, and the appearance may be damaged, and problems such as floating of the joint between sheets may occur. It is not preferable.

  Further, by laminating the thermoplastic sheet 7 on the surface of the water shielding sheet 4 that is heat-sealed with the fixing plate 2, the time required for fusion between the water-shielding sheet 4 and the fixing plate 2 can be greatly shortened. Can do.

  As the thermoplastic sheet 7, a polyolefin resin such as polyethylene, an olefinic thermoplastic elastomer composed of an ethylene / α-olefin copolymer resin layer, or the like can be used, and a sheet having a thickness of 30 to 300 μm is usually laminated. If the thickness is less than 30 μm, the strength due to heat fusion is reduced due to the thermoplastic sheet 7 not conforming to the pattern on the surface of the sheet, and if it exceeds 300 μm, the water shielding is caused by the difference in thermal shrinkage with the water shielding sheet 4. Since large warp is generated in the sheet 4, it is not preferable.

  As a method of laminating the water shielding sheet 4 and the thermoplastic sheet 7, the water shielding sheet 4 and the thermoplastic sheet 7 can be laminated and integrated by heating and pressing with a heat roll or the like. Further, in the heated state shortly after vulcanizing the water shielding sheet 4, the thermoplastic sheet 7 is laminated and fused using the heat generated when the water shielding sheet 4 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 11 and a predetermined temperature (150 to 200 ° C.) from the introduction roll 12. The thermoplastic sheet 5 is vulcanized by being fed into the vulcanizing can 13 set to, and fed out from the derivation roll 14 to the outside of the vulcanizing can 13, and the thermoplastic sheet 5 is laminated and integrated by the pressure contact roll 16 via a plurality of guide rolls. And wound on a winding roll 19 via a tension roll 18.

  At this time, the surface of the vulcanized rubber water-impervious sheet 4 just sent out from the vulcanization can 13 is 130 to 150 ° C., and the thermoplastic sheet can be easily fused.

  The fixing plate 2 of the present invention includes a plate body 6 such as a circle, a square, or a rectangle having a diameter of about 60 to 100 mm made of a metal such as stainless steel, a galvanized steel plate, a galvanium steel plate, other inorganic materials, fiber reinforced resin, or the like. The coating material 7 covers at least the surface in contact with the water shielding sheet 1 and has a thickness of 0.2 to 1.5 mm. If the thickness is less than 0.2 mm, the strength is insufficient, and there is a possibility that the water-impervious sheet 4 may be destroyed when it tries to lift due to the negative pressure of the wind. If it exceeds 1.5 mm, the step appearing on the water-impervious sheet 4 becomes large and the appearance is impaired, which is not preferable.

  As the covering material 6, it is necessary to be a thermoplastic material that can be fused with the water shielding sheet 4, and olefin resins such as polyethylene, polypropylene, and ethylene vinyl acetate, and chlorinated polyethylene obtained by modifying them. , Modified olefin resins such as chlorinated polypropylene and maleated ethylene vinyl acetate, and olefinic thermoplastic elastomers. The covering material 6 may be a sheet or film-like material originally laminated and coated, or a liquid material may be coated. It can be said that coating hot melt resin is a relatively simple form.

  Further, the plate body 5 and the covering material 6 are fixed to each other by, for example, fusing or interposing an adhesive. The plate body 5 needs to be a conductor that can be heated by electromagnetic induction heating, and preferably has a high rust resistance and weather resistance. Specifically, a steel plate, a hot dip galvanized steel plate, a hot dip aluminum plated steel plate. Cold rolled stainless steel plate, aluminum plate, aluminum alloy plate and the like.

  The thickness of the plate body 5 varies depending on the type of metal used, but a thickness of about 0.4 to 2.0 mm is usually used. When the thickness is less than 0.4 mm, the rigidity is low and the shape as a roofing material cannot be maintained. When the thickness exceeds 2.0 mm, the workability becomes poor and the weight increases, which is not preferable. 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.

  The adhesion between the plate body 5 and the covering material 6 is performed by the following method, for example. First, the metal plate is degreased. As the degreasing method, a suitable method is selected from the alkali cleaning method, the solvent cleaning method, the emulsion cleaning method, the electric field degreasing cleaning method and the like according to the metal to be used. Next, rust prevention and roughening of the metal are performed. Chemical methods include pickling and alkali rust prevention methods, and physical methods include plast method, liquid honing method, water jet method, sandpaper polishing method, etc., depending on the situation, one or two Use in combination.

  The chemical conversion treatment in the next step varies depending on the type of metal, but a phosphate coating, a chromate coating, an oxalate coating, and a coupling material treatment coating are applied. Then, the covering material 6 is bonded using a urethane adhesive, an epoxy resin adhesive, or the like. The covering material 6 may be disposed only on the surface in contact with the plate body 5 and the water shielding sheet 4, but may cover the entire surface, which is preferable in that the covering material 6 is difficult to peel from the plate body 5. It can be said.

  Even when fusing, it is possible to treat the surface of the plate body 5 as described above and heat-fuse it with a hot-melt type bonding material, or fuse the covering material 6 directly to the plate body 5. It is.

  In order to increase the fixing strength between the plate body 5 and the covering material 6, it is possible to take a structure as shown in FIG. The plate body 5 has at least one through hole 8 penetrating the front and back surfaces. A covering material 6 covering the plate body 5 enters the through hole 8 and is integrated with the covering material 6 on the back surface. It is physically and mechanically fixed to the main body 5. By such a fixing method, even a material having poor adhesiveness to metal can be fixed sufficiently firmly, so that it can be used for fixing the water shielding sheet 4 as a matter of course.

  In addition, as a method for fixing the covering material 6 to the plate body 5, a configuration in which the front and back surfaces are completely covered and the both are integrated in the through hole 8 is shown above. However, the coating material 6 on the back surface can be integrated with the coating material 6 on the front surface and the through-hole 8 to fix the coating material 6 to the plate body 5. It does not matter if it only needs to work, and even if it does not cover the entire surface, it may have a shape having a protruding portion 9 on the back surface as shown in FIG. In this case, the covering material 7 is mechanically fixed to the plate body 5 between the portion covering the front surface and the protruding portion 9 on the back surface.

  Next, the wall fixing method of the water shielding sheet of the present invention was carried out, and the adhesive strength between the water shielding sheet and the fixing plate was measured.

  In Example 1, the water-impervious sheet was made of JIS A6008 general composite type vulcanized rubber EPDM, which was reinforced by laminating a base fabric made of glass fiber, and having a thickness of 1.5 mm. As a fixed plate, a circular plate made of galvanized steel with a thickness of 0.6 mm and a diameter of φ90 mm is used for the plate body, and a 0.2 mm thick sheet of TPO is stacked on the plate body via an adhesive, and heat lamination is performed. A coating was made by laminating and coating with an apparatus. As the anchor member, a 4.5 mmφ stainless steel screw and a φ6.0 mm nylon plug were used.

  The fixing plate was fixed to the side wall using an anchor member, and the water shielding sheet having the above specifications was superimposed thereon, and the fixing plate and the water shielding sheet were fused by electromagnetic induction heating.

  The heating time required for fusing was measured, and after cooling and fusing was completed, the peel strength between the water shielding sheet and the fixing plate was measured. The measurement conditions were a peeling rate of 200 mm / min and a measurement temperature of 21 ° C.

  As Example 2, it carried out on the same conditions as Example 1 except having used what laminated | stacked and integrated the 30-micrometer-thick thermoplastic sheet which consists of a low density polyethylene in the water-impervious sheet. Similarly, the heating time required for fusing was measured, and after cooling and fusing was completed, the peel strength between the water shielding sheet and the fixed plate was measured.

  As Example 3, it carried out on the same conditions as Example 1 except having used what laminated | stacked and integrated the 50-micrometer-thick thermoplastic sheet which consists of a low density polyethylene in the water shielding sheet. Similarly, the heating time required for fusing was measured, and after cooling and fusing was completed, the peel strength between the water shielding sheet and the fixed plate was measured.

  Example 4 was carried out under the same conditions as in Example 1 except that a water shielding sheet and a 150 μm thick thermoplastic sheet made of low density polyethylene were laminated and integrated. Similarly, the heating time required for fusing was measured, and after cooling and fusing was completed, the peel strength between the water shielding sheet and the fixed plate was measured.

  Example 5 was carried out under the same conditions as in Example 1 except that a water shielding sheet and a 300 μm thick thermoplastic sheet made of low density polyethylene were laminated and integrated. Similarly, the heating time required for fusing was measured, and after cooling and fusing was completed, the peel strength between the water shielding sheet and the fixed plate was measured.

  Example 5 was carried out under the same conditions as in Example 1 except that a water shielding sheet and a 350 μm thick thermoplastic sheet made of low density polyethylene were laminated and integrated. Similarly, the heating time required for fusing was measured, and after cooling and fusing was completed, the peel strength between the water shielding sheet and the fixed plate was measured.

Comparative Example 1

  As a comparative example, the water-impervious sheet was fixed under the same conditions as in Example 1 except that a fixing plate not coated with a coating material was used. Similarly, the heating time required for fusing was measured, and after cooling and fusing was completed, the peel strength between the water shielding sheet and the fixed plate was measured.

  As can be seen from the results in Table 1, the comparative example does not exhibit peel strength. In contrast, in Examples 1 to 6, the peel strength is a value greater than a certain value. Among them, Examples 2 to 6 using a thermoplastic sheet can greatly shorten the heating time required for fusing. .

  Moreover, in Examples 2-6, although the warp generate | occur | produced in Example 2 and 6, this is considered to be based on the difference of the shrinkage | contraction rate between a water-impervious sheet and a thermoplastic sheet, and a thermoplastic sheet. It turns out that generation | occurrence | production of a warp can be prevented by making thickness of this into the thickness of the range of Examples 3-5.

  INDUSTRIAL APPLICABILITY The present invention can be applied when laying and arranging a water shielding sheet on a wall standing up with respect to a base in a waste disposal site, a reservoir, a general building, or the like.

It is a schematic sectional drawing which shows an example of the waste disposal site which implements the wall surface fixing structure of the water-impervious sheet of this invention. It is sectional drawing when the wall surface fixing structure of the impermeable sheet of this invention was implemented. It is sectional drawing of a fixed plate. It is outline | summary explanatory drawing of the place which crimps | bonds the thermoplastic sheet in the vulcanization | cure process of a water-impervious sheet. It is sectional drawing which shows another form of a fixed plate. It is sectional drawing which shows another example of a fixing plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side wall 2 Fixed plate 3 Anchor member 4 Water shielding sheet 5 Plate main body 6 Coating material 7 Thermoplastic sheet 8 Through-hole H Waste disposal site S Ground

Claims (8)

  In the wall fixing structure of a water shielding sheet that lays and fixes a water shielding sheet on a wall standing up against the ground, a fixing plate made of a conductor in which a covering material is laminated and bonded to at least the surface in contact with the water shielding sheet is provided on the side wall. The anchor plate is fixed, and the impermeable sheet is stacked on top of it, and the fixing plate is heated by electromagnetic induction heating from above the impermeable sheet to melt the covering material and melt the impermeable sheet and the fixing plate. A wall fixing structure for a water shielding sheet, wherein the water shielding sheet is fixed by wearing.   2. The wall fixing structure for a water shielding sheet according to claim 1, wherein a thermoplastic sheet is laminated and fused at least at a location where the water shielding sheet is thermally fused with the fixing plate.   The wall surface fixing structure for a water shielding sheet according to claim 2, wherein the thermoplastic sheet has a thickness of 30 to 300 µm.   The fixing plate comprises a plate body having one or more through holes and a covering material covering the front and back surfaces of the plate body, and the covering materials on the front and back surfaces are connected at least through the through holes of the plate body. The wall surface fixing structure of the water shielding sheet according to 1 to 3.   In a wall fixing method of a water shielding sheet that lays and fixes a water shielding sheet on a wall standing up against a base, a fixing plate made of a conductor in which a coating material is laminated and bonded to at least the surface in contact with the water shielding sheet is provided on the side wall. The anchor plate is fixed, and the impermeable sheet is stacked on top of it, and the fixing plate is heated by electromagnetic induction heating from above the impermeable sheet to melt the covering material and melt the impermeable sheet and the fixing plate. A method for fixing a wall surface of a water shielding sheet, comprising fixing the water shielding sheet by wearing.   The method for fixing a wall surface of a water shielding sheet according to claim 5, wherein a thermoplastic sheet is laminated and fused at least at a location where the water shielding sheet is thermally fused with the fixing plate.   The method for fixing a wall surface of a water shielding sheet according to claim 6, wherein the thickness of the thermoplastic sheet is in the range of 30 to 300 µm. The fixed plate is composed of a plate body having one or more through holes and a covering material covering the front and back surfaces of the plate body, and the covering materials on the front and back surfaces are connected at least through the through holes of the plate body. The method for fixing a wall surface of the water shielding sheet according to 5 to 7.

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