JP2007020464A - Fixing structure to fix to rooftop water retention drainage base material to be used for rooftop greening, and rooftop greening facility using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing structure of a water retention drainage base material for rooftop greening, for fixing the water retention drainage base material not to rooftop waterproof layer protection concrete but to a rooftop waterproof layer, and for sufficiently protecting the rooftop waterproof layer from plant roots. <P>SOLUTION: This fixing structure comprises laying a root prevention sheet 3 on the rooftop waterproof layer 2, making a longitudinal hole 40 reaching a concrete layer 1 which pierces into both the sheet and the layer and makes the rooftop slap of a building, establishing in a standing condition and fixing a stud bolt 10 onto the longitudinal hole 40 using a chemical anchor. Furthermore, the structure comprises attaching preferably doubly cylindrical members 12 and 15 in a condition of outward engaging with the stud bolt 10, filling a sealing material 13 inside, attaching a water retention drainage base plate 30 using the stud bolt 10, and putting soil 36 on the plate for planting. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fixing structure for fixing a water retention / drainage base material used in rooftop greening to a rooftop and a rooftop greening facility using the same.

  In recent years, as a part of urban greening or as a countermeasure for heat island, so-called rooftop greening has been promoted in which plants are cultivated on the rooftops of buildings or the roofs of factories. In the case of an existing building, a rooftop waterproofing layer such as an asphalt layer is formed on the rooftop, and concrete is pressed onto it to protect the rooftop waterproofing layer. Anchors such as stud bolts are driven into concrete, the water retention drainage base material made of resin foam is fixed using the anchors, and the rooftop greening soil and vegetation mats containing soil are placed on top of it. It is arranged to constitute a rooftop greening facility. A root-proof sheet is laid on the protective concrete, and the water retention / drainage base material is fixed thereon using an anchor.

  In the case of rooftop greening, there is a load limit on the rooftop, and it may be difficult to secure enough soil for greening. As countermeasures thereof, it has been proposed to install a water retention drainage base material directly on the roof waterproofing layer without using protective concrete for greening the roof (for example, refer to Patent Document 1, Patent Document 2, etc.). . In this case, since the weight of the protective concrete can be turned to the soil necessary for greening, sufficient soil necessary for greening can be ensured. However, since a concrete layer that protects the rooftop waterproof layer is not formed, it is necessary to protect the rooftop waterproof layer by some means and firmly fix it on the rooftop so that the water retention drainage base material does not blow off by the wind. .

  In the planting apparatus described in Patent Document 1, a root-proof sheet is attached to the roof waterproof layer to protect the roof waterproof layer, and the back surface of the water retention drainage base is adhered and fixed on the root waterproof sheet. Yes. The water retention drainage base has a protrusion partly, and the seedling pan is fixed by fitting a concave part of the seedling pan into the protrusion and screwing it.

In the planting installation structure described in Patent Literature 2, a large number of water retention drainage bases (planting trays) are arranged on the roof so that a ventilation space is formed between the back side and the tray connection gap, and the trays are connected to each other. In addition, the tray is fixed to the roof using a stud bolt with a base and an attachment jig fixedly bonded to the roof waterproof layer.
JP 2001-54321 A JP 2004-24045 A

  In the planting apparatus described in Patent Document 1, when rooftop greening is performed, a root-proof sheet is first attached to the top surface of the rooftop waterproof layer, and a water retention drainage base is attached to the root-proof sheet and fixed. Therefore, in order to stably fix the water retention / drainage base on the roof, it is necessary to adhere and fix the entire surface of the root-proof sheet to the roof waterproofing layer, which is difficult to apply and at the time of repair. It is not easy to peel off. Furthermore, the amount of adhesive used is increased and the cost is increased. In addition, olefin-based resin sheets such as polyethylene and polypropylene are sometimes used as rooftop waterproofing layers instead of asphalt, but olefin-based resin sheets generally do not have good adhesive properties, and the root-proof sheet is waterproofed on the roof. It can happen that sticking and fixing to the layer itself becomes difficult.

  In the planting installation structure described in Patent Document 2, a large number of planting trays are arranged in a lattice pattern on the rooftop waterproof layer, and the stud bolts with pedestals are used as the rooftop waterproof layer using gaps formed therebetween. The planting tray is fixed using an attachment jig fixed to the stud bolt, and it is not easy to protect the entire surface of the roof waterproof layer. Further, the roof waterproof layer has a surface exposed, and when the plant seeds come and adhere to the roots or when the roots from the planting tray adhere, the roof waterproof layer may be damaged. Also here, when an olefin resin sheet is used as the roof waterproof layer, it is difficult to stably fix the stud bolt with pedestal to the roof waterproof layer using an adhesive, and as a result, planting installation The structure itself becomes unstable.

  The present invention has been made in view of the circumstances as described above, and the water retention / drainage base material for rooftop greening, in which the water retention / drainage base material is fixed to the rooftop waterproofing layer instead of the rooftop waterproofing layer protection concrete. In the fixing structure, it is easy to lay a root-proof sheet, can stably fix the water retention drainage base material regardless of the material of the roof waterproof layer, and can sufficiently protect the roof waterproof layer from the root of the plant An object of the present invention is to provide a fixed structure and a rooftop greening facility using the same.

  The fixing structure according to the present invention is a fixing structure for fixing a water retention / drainage base material used for rooftop greening on the rooftop, and penetrates both the rooftop waterproofing layer and the root protection sheet laid on the rooftop basement. A stud bolt standingly fixed, and a cylindrical member fastened to the stat bolt in a state where the stud bolt is externally fitted to the stud bolt and a lower end surface thereof is in contact with the roof waterproof layer or the root-proof sheet; It is characterized by comprising at least a sealing material filled in the tubular member, and a water retention / drainage substrate fixed using the stud bolt. One cylindrical member may be attached, or a plurality of cylindrical members may be arranged concentrically.

  In the above fixing structure, one end of the stud bolt that penetrates both the roof waterproofing layer formed on the roof base and the root-proof sheet laid thereon is directly fixed to the roof base, and an adhesive is used. Compared with the case of fixing by using, extremely high stability can be obtained. A through-hole through which a stud bolt passes is formed in the roof waterproof layer and the root-proof sheet, and a tubular member is disposed in a state of being fitted to the stud bolt, and a lower end surface of the tubular member is a roof waterproof layer Or since it is in a state in contact with the root-proof sheet and the cylindrical member is filled with a sealing material, rain water or water sprinkled through the gap formed between the through hole and the stud bolt is rooftop. It does not invade the groundwork, and the function as a rooftop waterproof layer is not hindered. In addition, the roots of the plant do not enter the gap, and the roof waterproof layer is not destroyed.

  By arranging the bottom end surface of one or more cylindrical bodies so as to contact the root-proof sheet, the root-proof sheet can be pressed from above by the cylindrical body, so the whole surface of the root-proof sheet can be covered with an adhesive or the like. Even without bonding, the root-proof sheet can be stably held on the roof waterproof layer. Therefore, the laying work of the root prevention sheet can be simplified.

  The water retention / drainage base material is fixed by using the stat bolt standing and fixed in this manner. As the water retention / drainage base material, a water retention / drainage base material used in conventional rooftop greening or artificial ground greening may be appropriately used. The method of attaching the water retention drainage base material to the stud bolt is optional, but the aspect of fixing the water retention drainage base material by sandwiching the water retention drainage base material with the upper and lower nuts is a work It is preferable because of its ease.

  Preferably, a part of the sealing material filled in the cylindrical member passes through the through-hole formed in the root-proof sheet and the through-hole formed in the roof waterproof layer and reaches the roof base. By taking this configuration, it is possible to more reliably prevent water and plant roots from passing through the gap between the inside of the tubular member and the stud bolt. Furthermore, it is also a preferable aspect to use the same material as the material forming the rooftop waterproof layer as the sealing material filled in the cylindrical member. In this case, the sealing material and the rooftop waterproof layer are integrated. In addition, the loss of the waterproof layer due to the root intrusion can be more reliably prevented.

  As the sealing material to be used, those having adhesiveness are preferable, and asphalt, urethane, olefin-based resins such as polyethylene and polypropylene are preferable. It is also recommended to mix a drug that is disliked by roots (for example, trade name “Priventol” manufactured by Bayer).

  In the present invention, the roof base may be a concrete layer that constitutes the roof of a building, or may be a steel plate that constitutes a roof or a roof of a factory. In the case of a concrete layer, a stud bolt may be erected and fixed to the concrete layer by using a chemical anchor, and an embedded nut is installed in the concrete layer, and the stud bolt is erected and fixed by using it. You may do it. In the case of a steel plate, the stud bolt can be easily erected and fixed by welding the lower end of the stud bolt to the steel plate.

  The present invention further discloses a roof planting facility characterized in that plants are vegetated on the water retention drainage base material fixed by the above-described fixing structure. The mode of planting the plant on the water retention / drainage base material is arbitrary, and is not particularly limited. As an example, lay a fine filter on the water retention drainage base material, lay a soil or vegetation mat on it, and if necessary, place a protective net on it, then stud bolts as a whole It is also possible to adopt a mode in which they are integrally fixed using Plant seeds are planted on soil or vegetation mats, or plant seedlings are planted and watered to grow the plants. Part of the sprinkled water stays on the soil and vegetation mat, and part falls to the water retention drainage base material and stays there. The water retention / drainage base material may be in a form in which water sprayed at a certain location flows in the water retention / drainage base material and flows naturally throughout the water retention / drainage base material attached to the warmth. Each drainage base material may have a form that stays on the spot.

  In the construction of the rooftop greening facility according to the present invention, first, the stud bolt is erected and fixed on the roof base, then the roof waterproof layer is constructed, and the root-proof sheet having a through hole at the position of the stud bolt May be laid on the waterproof layer, and thereafter, operations such as attachment of the cylindrical body and filling of the sealing material may be performed. In addition, after performing the waterproofing construction on the roof first, spreading the root-proof sheet and temporarily fixing it, penetrating the waterproof layer and the root-proofing sheet to make a hole in the ceiling concrete and fixing the stud bolt upright, Then, you may make it perform work, such as attachment of a cylindrical body, and filling of a sealing material. Furthermore, only waterproof layer construction is performed on the roof, and a hole is made in the ceiling concrete so as to penetrate the waterproof layer, and the stud bolt is erected and fixed, and then a root-proof sheet having a through hole at the position of the stud bolt is installed. After laying down, work such as attachment of the first cylindrical body and filling of the first sealing material may be performed.

  In the fixing structure according to the present invention and the rooftop greening facility using the same, as in the past, no protective concrete for protecting the rooftop waterproof layer is placed, so within the allowable rooftop load range, A sufficient amount of soil necessary for vegetation can be placed on the water retention drainage base material, and good rooftop greening can be performed. In addition, the water retention drainage base material necessary for rooftop greening is also stable on the rooftop, the entire rooftop greening facility is stable, and the rooftop waterproof layer is completely covered with a root-proof sheet, so the rooftop waterproof layer In addition, there is no loss for a long time.

  Hereinafter, the present invention will be described based on embodiments with reference to the drawings. FIG. 1a is a schematic cross-sectional view showing an example of a fixing structure according to the present invention and a rooftop greening facility using the same, and FIG. 1b is an enlarged view of a portion surrounded by a circle in FIG. 1a. FIG. 2 is an exploded view showing an example of a fixing member used in the fixing structure. 3 and 4 are views corresponding to FIG. 1b, showing another form of the fixing structure.

  The rooftop greening facility according to the present invention constructs the rooftop greening facility directly on the rooftop waterproofing layer without placing the rooftop waterproofing layer protective concrete on the rooftop waterproofing layer as in the prior art. Hereinafter, this invention is demonstrated with a construction procedure. In the example shown in FIG. 1, as shown in FIG. 1 a, a roof waterproofing layer 2 made of, for example, an asphalt layer or an olefin resin layer such as polyethylene or polypropylene is applied on a concrete layer 1 that forms a roof slab of a building. To do. Next, the stud bolt 10 used for fixing the water retention / drainage base material 30 is marked, and the vertical position reaching the concrete layer 1 through the waterproof layer 2 at that position using an appropriate tool. Hole 40 is made. Then, the stud bolt 10 is erected and fixed in the vertical hole 40 using the chemical anchor 41. Although not shown, a long nut may be embedded in the vertical hole 40 and the stud bolt 10 may be screwed therein.

  An appropriate root-proof sheet 3 having a through-hole 4 through which the standing stud bolt 10 passes is spread on the waterproof layer 2 and temporarily fixed using a double-sided tape or the like. The root-preventing sheet 3 may be a conventionally known sheet, but a sheet obtained by laminating polystyrene on a foamed polyethylene sheet is preferable. Temporary fixing may be performed using a double-sided tape or the like.

  In this example, the first cylindrical member 12 is attached to the standing stud bolt 10 in a state of being fitted outside so that the stud bolt 10 is substantially at the center. The first cylindrical member 12 is preferably a metal or resin ring provided that it has a required strength. In the illustrated example, the lower end surface of the first cylindrical member 12 passes through the through-hole 4 formed in the root-proof sheet 3 and reaches the waterproof layer 2, but the size placed on the root-proof sheet 3. It may be. Further, the overall shape may be a circular ring as shown, or may be an oval or a polygon.

  The sealing material 13 is filled into the attached first cylindrical member 12. The sealing material 13 is for preventing plant roots and water from entering the waterproof layer 2 side from the gap between the first tubular member 12 and the stud bolt 10, and preferably the waterproof layer 3. The same material as that constituting the material is used. After filling with the sealing material 13, the closing nut 14 that also serves as the upper cover of the first cylindrical member 12 is screwed into the stud bolt 10, and the cylindrical member 12 is pressed with the lower end surface pressed against the waterproof layer 2 or the root-proof sheet 3. Fix to the stud bolt 10. Thereby, a part of the filled sealing material 13 passes through the through-hole 4 formed in the waterproof layer 2 when making the through-hole 4 formed in the root-proof sheet 3 and the vertical hole 40, and the rooftop basement It will reach the upper surface of the concrete layer 1, and a firm waterproof and root-proof structure will be completed.

  As shown in FIG. 1 b, when the lower end surface of the first cylindrical member 12 is placed on the waterproof layer 2, the through hole 4 made in the root-proof sheet 3 and the outer periphery of the first cylindrical member 12 Water and plant roots may invade between the surfaces. In order to avoid this, in the embodiment shown in FIG. 1, the second cylindrical member 15 is attached so as to cover the entire first cylindrical member 12 and the closing nut 14 from the outside. The second cylindrical member 15 is also filled with the same sealing material 13, and, as in the case of the first cylindrical member 12, a closing nut 16 that also serves as a lid is screwed into the stud bolt 10, and The end surface is fixed in a state of being pressed against the root-proof sheet 3. By adopting a double seal structure in this way, the waterproof and root-proof structure can be ensured, and the root-proof sheet 3 can be more reliably suppressed.

  By performing the above operation on all the stud bolts 10, the stud bolts 10 can be fixed upright and the root protection sheet 3 can be fixed. Since no adhesive is used to fasten the root-proof sheet 3 on the waterproof layer 2, the root-proof sheet 3 can be fixed even when the waterproof layer 2 is made of an olefin resin layer.

  The water retention / drainage base material 30 is attached using the stud bolt 10 that is erected and fixed. The shape and structure of the water retention / drainage base material 30 are arbitrary, but in this example, a rectangular foamed resin molded product having a large number of water retention grooves 31 on the upper surface side is used. The through holes 32 formed in the corner portions are overlapped with each other, and the stud bolts 10 are passed therethrough so that a large number of the water retention and drainage base materials 30 are connected to each other in a stable manner.

  In the example shown in FIG. 1, the water retention / drainage base material 30 is formed on the back surface of the water retention / drainage base material 30 by forming a hole into which the second cylindrical member 15 and the closing nut 16 can enter. The bottom surface of the water retaining drainage base material 30 is attached to the roof surface in a posture in which the bottom surface of the water retaining sheet 3 is in close contact with the root prevention sheet 3. Alternatively, although not shown in the drawings, the bottom surface of the water retention / drainage base material 30 is attached so that the bottom surface of the water retention / drainage base material 30 rests on the top surface of the closing nut 16 used for fixing the second cylindrical member 15. A space S serving as a drainage channel can be formed between the two.

  The mode of planting plants on the water retention / drainage base material 30 attached is arbitrary. In the example shown in the figure, a fine filter 35 is laid on the water retention / drainage base material 30 and fixed with a washer 17 and a nut 18, and then a soil 36 is placed thereon, and a protective net 37 is further provided thereon. After the arrangement, the whole is fixed integrally using a washer 19 and a nut 20. An appropriate vegetation mat known in the art can be used instead of the soil. By planting plant seeds in the soil 36 or planting plant seedlings and sprinkling water to grow the plant 50, the greening of the roof proceeds.

  FIG. 3 is a view corresponding to FIG. 1b showing another embodiment of the fixing structure according to the present invention, and the same members are denoted by the same reference numerals. Here, the first cylindrical member in the fixing structure shown in FIG. 1b is that the lower end surface of the first cylindrical member 12 is not on the waterproof layer 2 but on the root-proof sheet 3. 12 and different. In this case, since the penetration of water and plant roots can be suppressed by the pressure contact surface between the root-preventing sheet 3 and the lower end surface of the first cylindrical member 12, the second cylindrical member 16 is used. The intended purpose can be achieved by attaching only the first tubular member 12 without any problem.

  FIG. 4 is a view corresponding to FIG. 1b showing still another embodiment of the fixing structure according to the present invention, and is different from that shown in FIG. 1b in that the closing nut 14 is not attached to the first tubular member 12. FIG. is doing. Also in this aspect, by screwing the closing nut 16 with respect to the second cylindrical member 15, the filled sealing material 13 is guided to the inner wall surface of the first cylindrical member 12 and is placed on the upper surface of the concrete layer 1 that is the roof base. Can be achieved, and a sufficient waterproofing and rooting effect can be obtained.

  Although not shown, the roof base may be a steel plate like a factory roof. In that case, the lower end of the stud bolt 10 is welded to the steel plate to be fixed upright on the roof base. Thereafter, by constructing the waterproof layer 2 and the root-proof sheet 3, a rooftop greening structure similar to that described above can be obtained.

  Further, in the description based on FIG. 1, after the waterproof layer 2 is constructed, the stud bolt 10 is erected and fixed, and then the root-proof sheet 3 is laid, but the root-proof sheet 3 is laid on the waterproof layer 2. Thereafter, an operation of forming the vertical hole 40 reaching the concrete layer 1 from above may be performed. After the stud bolt 10 is first erected and fixed to the concrete layer 1, the waterproof layer 2 and the root-proof sheet 3 can be applied.

FIG. 1a is a schematic cross-sectional view showing an example of a fixing structure according to the present invention and a rooftop greening facility using the same, and FIG. 1b is an enlarged view of a portion surrounded by a circle in FIG. 1a. The figure which decomposes | disassembles and shows an example of the member for fixing used with a fixing structure. The figure equivalent to FIG. 1 b which shows the other form of the fixing structure by this invention. The figure equivalent to FIG. 1 b which shows the further another form of the fixing structure by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Concrete layer making roof slab of building, 2 ... Roof waterproofing layer, 2a ... Through-hole formed in waterproof layer, 3 ... Root-proof sheet, 4 ... Through-hole formed in root-proof sheet, 10 ... Stud Bolt, 12 ... first cylindrical member, 13 ... sealing material, 14 ... closing nut, 15 ... second cylindrical member, 16 ... closing nut, 17, 19 ... washer, 18, 20 ... nut, 30 ... water retention Drainage base material, 31 ... Water retention groove, 32 ... Through hole formed in water retention drainage base material, 35 ... Filter, 36 ... Soil, 37 ... Protective net, 40 ... Vertical hole, 41 ... Chemical anchor, 50 ... Plant

Claims (7)

  It is a fixed structure for fixing the water retention and drainage base material used for rooftop greening to the rooftop, and is fixedly erected on the rooftop basement through both the rooftop waterproofing layer and the root-proof sheet laid on it. A stud bolt, a cylindrical member fastened to the stud bolt with the lower end surface being in contact with the rooftop waterproofing layer or the root-proof sheet, and a filling in the cylindrical member The fixed structure characterized by including at least a sealed sealing material and a water retention / drainage substrate fixed using the stud bolt.   The fixing structure according to claim 1, wherein a plurality of cylindrical members are arranged concentrically.   A part of the sealing material filled in the cylindrical member passes through the through hole formed in the root-proof sheet and the through hole formed in the roof waterproof layer and reaches the roof base. Item 3. The fixing structure according to Item 1 or 2.   The fixing structure according to claim 1, wherein the sealing material filled in the cylindrical member is the same material as the material forming the roof waterproof layer.   The fixing structure according to any one of claims 1 to 4, wherein the roof base is concrete, and a part of the stud bolt is erected and fixed in the concrete via a chemical anchor or an embedded nut. .   The fixing structure according to any one of claims 1 to 4, wherein the roof base is a steel plate, and a lower end of the stud bolt is welded to the steel plate.   A planting plant for greening, wherein plants are vegetated on the water retention and drainage base material fixed by the fixing structure according to claim 1.

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