JP3831246B2 - Water stop member and water blocking sheet fixing part - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water-stopping member and a water-blocking sheet fixing part water-stopping structure, and fixing a water-blocking sheet at a joint between a water-blocking sheet laid in a final disposal site and a structure built in the disposal site. The present invention relates to a water-stopping member used for a portion, and a water-blocking sheet fixing portion water-stopping structure in which high watertightness is obtained by the water-stopping member.
[0002]
[Background Art and Problems to be Solved by the Invention]
At the final disposal site for general waste, leachate control is generally performed to collect leachate collected on a water-impervious sheet laid as a water-impervious work and direct it to the leachate adjustment facility provided in the site. . For example, a structure such as a water intake pit is constructed in the disposal site for leachate control. Since the water-impervious sheet is interrupted at the joint with the structure such as the water intake pit, the end of the water-impervious sheet is fixed to a part of the concrete of the structure. Therefore, it is necessary to ensure that sufficient water tightness is maintained so that leachate does not leak from the sheet fixing portion.
[0003]
FIG. 6 is a partial cross-sectional view showing an example of a water shielding sheet fixing portion water stop structure at a joint portion between a structure and a water shielding sheet. As shown in the figure, in this water shielding sheet fixing unit 50, the end portion of the water shielding sheet 53 is pressed by a stainless steel flat bar 52 (flat steel) with a rubber packing 51 interposed, and the concrete C surface is preliminarily provided. The flat bar 52 is fixedly held on the hole-in anchors 54 arranged in a row to form a water-stop structure. At this time, the tape 55 made of non-vulcanized butyl rubber is interposed between the flat bar 52 and the sheet 53 to enhance the adhesiveness between the rubber packing and the sheet, and the water-stopping property (watertightness) is enhanced.
[0004]
This type of anchor bolt water blocking sheet fixing part water stop structure has many achievements so far, but since the anchor bolt for the subsequent construction is applied to the concrete surface, the finish accuracy of the concrete surface and the anchor bolt Variation in construction accuracy is easy. For this reason, there is a possibility that the water tightness cannot be sufficiently secured in the impermeable sheet fixing portion at a position where a large water pressure of 10 m or more is applied. In addition, since metal parts such as bolts and flat bars are exposed, there is a risk of deterioration of members due to electrolytic corrosion in long-term use at locations that are always submerged.
[0005]
In consideration of these problems, resin waterproofing members have been developed which are used by being embedded in the concrete of the structure. FIG. 7 is a perspective view showing the shape of this type of embedded waterproofing member 60, and FIG. 8 is a cross-sectional view showing an example of the structure of a water shielding sheet fixing portion using this waterproofing member 60. As shown in FIG. 7, the water blocking member 60 is a long molded part of high density polyethylene resin having a substantially U-shaped groove (channel) cross section. Although various cross-sectional dimensions can be formed depending on the use of the water stop structure, for example, as a water stop member for general use, the height of the flange 61 corresponding to the groove depth is 40 mm, and the width of the base 62 is about 80 mm. Things are used. Although the basic shape is a groove shape, as shown in the figure, the flange tip 63 is bent into a nail shape in order to increase the pulling resistance at the time of embedding.
[0006]
In order to use the water blocking member 60 for the water shielding sheet fixing portion, as shown in FIG. 8, first, the groove opening faces downward, and is flush with the concrete C surface on which the base 62 is placed. It embeds in the concrete C so that it may extend along the edge part 64a of 64. Then, the water-impervious sheet end portion 64a is arranged so as to overlap along the center position of the base 62, and the overlapping portion between the water-impervious sheet end portion 64a and the base 62 of the water blocking member 60 is extruded by a high-density polyethylene resin. Thus, the overlay resin 65 is formed and fixed, and the sheet end portion 64a and the water stop member 60 are integrated.
[0007]
By the way, in recent years, an olefin-based thermoplastic resin elastomer rubber-based flexible polymer alloy water-proof sheet (hereinafter referred to as FPA water-proof sheet) is used as a new type of water-proof sheet instead of the conventional high-density polyethylene resin. It has come to be. For this reason, it has become necessary to fix the FPA water shielding sheet to a water-stopping member made of a high-density polyethylene resin of a different kind of resin. In this case as well, extrusion bonding is used to join the sheet end to the water-stopping member. In this case, as shown in FIG. It is necessary to press the end portion 64a, perform extrusion joining by FPA, and join the sheet so as to cover the overlay resin 65 of the high-density polyethylene resin with the overlay resin 66 of FPA. Double. Further, when the water shielding sheet has a double sheet structure, the width of the overlay resin is increased, and therefore, it is sometimes necessary to bury the water stop members having the shape shown in FIG. .
[0008]
Further, in the water stop member used by being embedded in concrete as shown in FIG. 8, a gap with the water stop member is generated due to drying shrinkage of the concrete and the leachate penetrates to the back surface of the water stop member along this gap. There is also a fear. Thus, even when a gap is generated between the embedded water-stopping member and the concrete, it is required that the infiltration of the leachate can be reliably blocked.
[0009]
Accordingly, the object of the present invention is to solve the problems of the conventional techniques described above, and to provide a durable water stop for reliably stopping the leachate at the fixing part of the water shielding sheet and the joint part of the structure. It is in providing a water stop structure of a member and a water shielding sheet fixing part.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a base portion, a flange that is bent and integrally formed with the base portion at both ends of the base portion, and parallel to the flanges at both ends at the center in the width direction of the base portion. And a water-swelling water-stopping bar material provided on the surface of the member along the longitudinal direction of the member and a water-stop flange formed so that a plurality of protrusions extend. A water member, wherein one surface of the base portion is exposed on the surface of the concrete structure, and the flange and the water stop flange are embedded in the concrete structure so as to be positioned in the concrete, characterized in that the surface exposed to the concrete surface of the base portion, one end of the cover sheet that covers the fixing portion of the water shield sheets laid so as to cover the surface of the coating object is to be secured To.
[0011]
It is preferable from the viewpoint of durability and the like that the water-stopping member is composed of an olefin-based thermoplastic resin elastomer rubber molded product.
[0013]
As construction of the water shield sheet fixing unit using the water-shutoff member, the present invention is water-impervious sheet end portion is fixed through the flat bar to the anchor bolt column concrete table surface of the fixing position, the anchor bolts column The base part of the waterproofing member according to claim 1 embedded in the concrete structure in parallel with the anchor bolt row, and covered with a cover sheet fixed to the surface of the waterproof sheet. It is characterized by that.
[0014]
At this time, it is preferable that the water-impervious sheet, the water-stop member, and the cover sheet are olefin-based thermoplastic resin elastomer rubber molded products.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a water stop member and a water shielding sheet fixing portion water stop structure of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view showing an end face shape of a water stop member 10 of the present invention. In the same figure, a water-swellable water-stopping bar 20 is shown together with the water-stopping member 10. In the present embodiment, the water-swellable water-stop bar 20 is bonded to a part of the water-stop flange 15 of the water-stop member 10 and is used in combination to increase the water-stop of the water-stop member 10.
[0016]
[Configuration of water stop member]
The structure of the water stop member 10 of the present invention will be described. As shown in the drawing, the water stop member 10 includes a water stop flange 15 on the bottom surface of the base 11 in addition to a groove-shaped cross section having the same shape as that of the conventional structure in which a base 11 and flanges 12 on both sides of the base 11 are integrated. It consists of the shape integrally formed in the center position. The water stop flange 15 serves to extend the path of the leachate that may travel along the surface of the water stop member 10. Further, a plurality of triangular protrusions 13 are formed on the flange surface so as to extend in parallel with the longitudinal direction of the member. The plurality of protrusions 13 perform a packing action on a gap (not shown) that may be generated by contraction of the placed concrete C (FIG. 2). Furthermore, a space 14 to which a water stop rod 20 can be attached is provided at the bottom of the water stop flange 15. The water stop rod 20 is bonded to the surface of the space 14 to be integrated with the water stop member 10, and concrete is placed.
[0017]
In the present embodiment, the ratio of the width of the base 11 and the height of the water stop flange 15 (aspect ratio) is made equal as the size and shape of the cross section of the water stop member 10, and both are 100 mm. When it is necessary to increase the width of the overlay resin for bonding, it is preferable to increase the base width. At that time, even if only the base width is increased, the entire water-stopping member 10 may be enlarged with a constant aspect ratio. In the present embodiment, the basic thickness of the water stop member 10 is 5 mm. However, when the overall dimensions are increased, it is also preferable to increase the thickness in order to ensure rigidity.
[0018]
In the present embodiment, an FPA resin molded product is used as the water stop member 10. By using the same material for the water blocking member 10 and the water blocking sheet 1, an FPA build-up resin is formed by one-time extrusion bonding with the FPA resin, and the water blocking sheet end 1a and the base 11 of the water blocking member 10 are Can be integrated (see FIG. 2).
[0019]
The water stop rod 20 attached to the water stop member 10 is a known composite swelling material in which a non-swellable core rubber 21 is disposed. The core rubber 21 disposed inside suppresses bending of the bar to a minimum even if the non-swelling of the water blocking bar 20 occurs. Further, a water swelling sponge layer 22 is formed around the core rubber 21, and a swelling delay layer 23 is formed so as to cover the water swelling sponge layer 22. Thus, by having the swelling layers 22 and 23 having a plurality of swelling performances, the initial swelling at the time of concrete hardening can be suppressed, and the adverse effect on the frame can be reduced. And the leaching water which has passed along the surface of the water stop member 10 embed | buried in hardened concrete can be interrupted | blocked in the stable state. In the present embodiment, a water stop rod 20 having a cross-sectional dimension of 20 mm in height and 10 mm in width is used in accordance with the size of the water stop member 10. In the present embodiment, a pair is provided on the left and right surfaces of the water stop flange 15, but the water stop bar 20 may be omitted or used in multiple stages depending on the required water tightness (water stop).
[0020]
FIG. 2 is a cross-sectional view showing a state in which the water shielding sheet end 1 a is extrusion bonded to the upper surface of the base 11 of the water blocking member 10 embedded in the concrete C and fixed and held by the overlay resin 16. When placing concrete, a part of the water stop flange 15 of the water stop member 10 is fixed to a reinforcing bar (not shown), or is temporarily fixed to the surface of the formwork, so as not to be displaced by the placed concrete. It is preferable to make it. In addition, it is preferable that the concrete is compacted so that the concrete is sufficiently spread around the water-stopping member 10 and the water-stopping bar member 20 and can be closely adhered to the concrete.
[0021]
[Configuration of water blocking sheet fixing part water stop structure]
3 to 5 about the water blocking sheet fixing part water stop structure laid so as to cover the intake hole of the intake pit constructed in the final disposal site and the surrounding concrete, and the sheet end is fixed around the intake hole. Will be described with reference to FIG.
FIG. 3 is a perspective view showing the configuration of the water intake hole 3 (part) and the water blocking sheet fixing portion water stop structure 40 at the water intake hole 3. As shown in the figure, a stainless steel perforated screen 4 is provided to cover the entire water intake hole of a square cross section (for example, 1000 × 1000 mm) provided at a predetermined depth of the vertical wall of the water intake pit 2. It is fixed. A water blocking sheet fixing portion water stop structure 40 is provided in a square shape so as to surround the perforated screen 4 at a position away from the opening edge 3 a of the water intake hole 3. Furthermore, the anticorrosion work 5 is given to the concrete surface between the water shielding sheet fixing | fixed part water stop structure 40 and the opening edge 3a. Further, the water shielding sheet fixing part water stop structure 40 includes an anchor bolt fixing part 30 that fixes and holds the water shielding sheet 1 to the concrete C, and a cover part 41 that covers the entire anchor bolt fixing part 30 with a cover sheet 42. Yes. In this embodiment, a water shielding sheet, a cover sheet, and a water stop member made of FPA are used. The material of the water shielding sheet, cover sheet and water-stopping member is not limited to this FPA, but may be a synthetic resin sheet or rubber as long as the material meets the required specifications for use such as flexibility, strength, durability and cost. Needless to say, elastomers, rubber sheets, laminated sheets of various materials, and the like can be used.
[0022]
(Structure of anchor bolt fixing part)
As shown in FIG. 4, the anchor bolt fixing unit 30 is positioned on the concrete surface in the vicinity of the engaging portion with the water intake hole 3 that is a structure, and the water shielding sheet 1 has an end aligned at the position. And fixedly held. For this reason, an anchor bolt row 31 (indicated by a one-dot chain line in FIG. 4) in which a plurality of anchor bolts as a fixing member are arranged in a row is provided at the fixing portion position. The end portion 1a of the water shielding sheet is pressed by a flat bar 36 arranged in the longitudinal direction of the anchor bolt row 31 so that the flat bar 36 is fixed and held by each bolt and nut of the anchor bolt row 31. The anchor bolt fixing unit 30 is covered with a cover sheet 42 made of the same material as the water shielding sheet 1 to form a water shielding sheet fixing unit water stop structure 40.
[0023]
A detailed configuration of the anchor bolt fixing unit 30 will be described. A non-vulcanized butyl rubber tape 33 having a predetermined width (for example, 200 mm) is bonded to the concrete surface with the position of the anchor bolt row 31 as one end. The non-vulcanized butyl rubber tape 33 absorbs the unevenness of the concrete surface to some extent. In this embodiment, the width W of the anchor bolt fixing unit 30 is set to 50 mm, and is aligned with the anchor bolt row 31 at the center position in the width direction of the fixing unit so as to be equal to the fixing unit width W. The processed members are stacked.
[0024]
In the anchor bolt fixing unit 30, the water shielding sheet end 1 a is bonded and laminated between the lower rubber packing 34 and the upper rubber packing 35 via the non-vulcanized butyl rubber tape 33 and held at the position of the bolt row 31. Further, the rubber packings 34 and 35 sandwiching the water shielding sheet 1 are pressed by a stainless steel flat bar 36 having attachment holes formed along the bolt rows 31 and fastened by nuts 37 and fixedly held at a fixing position. . Further, the nut 37 is covered with a protective cap 38 to prevent the cover sheet 42 from being torn. In the present embodiment, a water shielding sheet having a sheet thickness of 1.5 mm is used, but the thickness is appropriately set according to the specifications of the water shielding sheet used as a water shielding work.
[0025]
(Structure of cover part)
Hereinafter, the structure of the cover part 41 is demonstrated. Further, the anchor bolt fixing portion 30 is entirely covered with a cover sheet 42 of a cover portion 41 having a predetermined width in parallel with the anchor bolt row 31 and provided in the longitudinal direction. One end of the cover sheet 42 is fixed on the base 11 of the water stop member 10. Therefore, as shown in FIG. 3, the water stop member 10 has a □ shape so that the water stop member 10 surrounds the rectangular water intake hole 3, and is shown in FIGS. 4 and 5 in the concrete C. Further, the surface of the base 11 is exposed so as to be flush with the surface of the concrete C, and the other portions are completely embedded in the concrete C. One end of the cover sheet 42 is fixed and held by the FPA overlay resin 43 on the base 11 of the water stop member 10.
[0026]
The other end of the cover sheet 42 is fixed and held by the same FPA overlaying resin 44 on the surface of the laid water shielding sheet 1. Further, a sealing material 45 is filled in a cover sheet 42 that covers the anchor bolt fixing portion 30 and swells in a mountain shape. As a result, the water stop effect is improved, and the filled sealing material 45 functions as a flexible backup material, so that the shape of the cover sheet 42 is maintained, and sheet tearing or the like can be prevented.
[0027]
In the waterproof sheet fixing part water stop structure 40 having such a structure, the waterproof sheet end 1a is securely fixed to the concrete surface by the anchor bolt row 31 in the anchor bolt fixing part 30, and the sealing material 45 and the cover Since the anchor bolt row 31 is completely covered with the cover portion 41 constituted by the sheet 42, there is no concern at all about the water leakage concerned at the anchor bolt fixing portion 30.
[0028]
【The invention's effect】
As described above, the water stop performance is enhanced by forming a water stop flange in the cross-sectional shape of the water stop member and the water stop performance is improved by the cover sheet fixed to a part of the water stop member. Since the anchor bolts in the sheet fixing portion are covered, the water blocking property at the water shielding sheet fixing portion is improved, and there is an effect that a durable water shielding sheet fixing portion can be realized.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an end face in an embodiment of a water stop member of the present invention.
FIG. 2 is a cross-sectional view showing an example of a water stop structure using the water stop member shown in FIG.
FIG. 3 is a schematic perspective view showing an embodiment of a water stop structure in a joint portion between a structure and a water shielding sheet, with a part of the water stop structure cut away.
FIG. 4 is a partial cross-sectional perspective view showing a part of the water blocking sheet fixing portion water stop structure in cross section.
FIG. 5 is a partial cross-sectional view showing a part of the water blocking sheet fixing part water stop structure in cross section.
FIG. 6 is a partial cross-sectional view showing an example of a conventional water shielding sheet fixing unit.
FIG. 7 is a perspective view showing an example of a conventional embedded type water stop member.
8 is a cross-sectional view showing an example of a water stop structure using the water stop member shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water shielding sheet 3 Water intake hole 10 Water stop member 11 Base 12 Flange 13 Protrusion 15 Water stop flange 20 Water stop rod 30 Anchor bolt fixing | fixed part 31 Anchor bolt row | line | column 40 Water shield sheet fixing | fixed part water stop structure 41 Cover part 42 Cover sheet 43, 44 Overlay resin 45 Sealing material

Claims (4)

A base part, a flange that is bent and integrally formed with the base part at both ends of the base part, and a member that is integrally formed at the center in the width direction of the base part in parallel with the flanges at both ends. The water-swelling water-stopping bar is provided along the longitudinal direction, and is a water-stop member composed of a water-stop flange formed so that a plurality of protrusions extend,
One surface of the base portion is exposed on the surface of the concrete structure, and the flange and the water stop flange are embedded in the concrete structure so as to be positioned in the concrete, and the concrete surface of the base portion A waterproofing member , wherein one end of a cover sheet that covers a fixing portion of a water shielding sheet laid so as to cover the surface of the object to be coated is fixed to the surface exposed to the surface .   The water-stop member according to claim 1, wherein the water-stop member is an olefin-based thermoplastic resin elastomer rubber molded product. Water shield sheet end portion is fixed through the flat bar to the anchor bolt column concrete table surface of the fixing position, the anchor bolts column claims in parallel to the anchor bolt columns embedded within the concrete structure A waterproofing sheet fixing part waterproofing structure characterized in that one end is fixed to the base part of the waterproofing member according to 1, and the other end is covered with a cover sheet fixed to the surface of the waterproofing sheet. The water blocking structure according to claim 3 , wherein the water shielding sheet, the water blocking member, and the cover sheet are olefin-based thermoplastic resin elastomer rubber molded products.

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