JP2820853B2 - Waterproof structure for root protection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for root prevention,
Specifically, it is a waterproof structure for planting trees on the roof of a concrete building, etc., and greening the roof, especially the root-proof waterproofing that always keeps the waterproofness so that the grown roots of the trees do not penetrate the waterproof layer. It is about structure.

[0002]

2. Description of the Related Art Conventionally, as a waterproof structure for planting trees on the roof of a concrete building or the like and greening the roof, a vulcanized rubber system, a resin system, or a thermoplastic elastomer is used as a base material of concrete or the like. Waterproof sheet is laid,
The soil dressing on it had been planted Oite Ueki. However, as the plants grew, the roots could break through the tarpaulin. For this reason, a nonwoven fabric is buried in the waterproof layer as a waterproof sheet to reinforce the waterproof sheet, or a waterproof sheet is further laid on the base, and a metal net-like reinforcing body is buried thereover via the nonwoven fabric. A waterproof structure in which laminated mortar layers are also proposed.

[0003]

In the conventional waterproof structure,
The mortar layer in which the reinforcement is buried has the function of growing the plant roots along the surface of the mortar layer.However, once the mortar layer cracks, the roots penetrate into this crack and expand it, The layer could be damaged. The roots then penetrated the mortar layer underneath the tarpaulin, piercing it and destroying the tarpaulin. An object of the present invention is to improve such a problem, and it is an object of the present invention to provide a root-proof waterproof structure for preventing a grown root of a plant from penetrating a waterproof layer so as to prevent the root from penetrating the waterproof layer. I do.

[0004]

That is, a feature of the present invention is that in a waterproofing structure for roots interposed between a ground surface and a soil planted with plants, the waterproof structure is provided on the ground surface. Made of thermoplastic resin on the laid waterproof layer
For the root protection, a white resin sheet, a cushion body provided with a water passage hole communicating the upper and lower surfaces and a ventilation groove at least on the lower surface, and a filter material that allows excess water to pass therethrough but prevents the outflow of the soil soil are sequentially laminated. It has a waterproof structure.

[0005]

According to the waterproof structure for protecting roots of the present invention, the resin sheet prevents the roots of the plant trees from penetrating and protects the waterproof layer laid on the ground, and has a strong joint by heat fusion. It also prevents root penetration from the junction. In addition, a cushion body having a water passage hole communicating the upper and lower surfaces and a communication groove on at least the lower surface protects the resin sheet and the waterproof layer by absorbing the weight of the soil and external impact force, and furthermore, the filter material is used for the filter material. Excess water in the soil is guided to the lower cushion body, and this water is also discharged to the outside through the water holes and the communication grooves of the cushion body, so that drainage is improved. Further, when the resin sheet is made white, it is difficult to absorb solar heat at the time of construction, so that heat shrinkage of the sheet does not occur and construction is facilitated.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a waterproof structure for root protection according to the present invention;
FIG. 2 is a perspective view of a cushion body used in the waterproof structure for root protection of the present invention, and FIG. 3 is a side view of a filter material used in the waterproof structure for root protection of the present invention. According to this, the waterproofing structure 1 for root protection of the present invention is interposed between a base surface 2 of a roof made of concrete or the like and a soil 3 on which plants are planted. In the waterproof structure 1 for root protection, a waterproof layer 4 made of a water-impervious sheet is laid on the base surface 2, and a resin sheet 5 for root protection made of a thermoplastic resin is placed thereon.
, A cushion body 6 having a communication hole at least on the bottom surface, and a filter member 7 that allows moisture to pass therethrough but prevents outflow of the soil. .

The waterproof layer 4 is made of a woven fabric made of glass fiber, polyester fiber or the like in a rubberized asphalt sheet, asphalt roofing embedded with a nonwoven fabric as a reinforcing material, ethylene-propylene terpolymer, butyl rubber or a blend thereof. And a water-impervious sheet such as a resin sheet such as PVC. When asphalt roofing is used, an asphalt waterproofing layer obtained by laminating asphalt roofing using hot asphalt as an adhesive on a sheet obtained by attaching an adhesive layer of a rubberized asphalt sheet to the main body of the rubberized asphalt sheet on the base surface 2 Is desirable. This is because the asphalt waterproof layer can sufficiently follow the behavior of the ground surface, and can maintain waterproofness for a long time.

The resin sheet 5 is made of a thermoplastic resin such as ethylene-vinyl acetate, polyethylene, polypropylene, or a blend thereof, and has a thickness of 0.5 to 0.5.
2.0 mm, hardness (JIS A) 80 or more, tensile strength at 300% of 60 kg / cm ² or more, and has root-proof properties. In addition, a white filler such as calcium carbonate, titanium oxide, and silica is mixed in this resin. The white resin sheet 5 is less likely to absorb solar heat during construction. This suppresses thermal shrinkage of the sheet to prevent waving deformation and bending deformation, and can improve workability on site.
Since the joint of the resin sheet 5 is heat-sealed, the root does not intrude from the joint.

The cushion body 6 is a plate-like foam made of polyethylene, polypropylene, polystyrene, polyurethane, rubber or the like and having a thickness of 50 to 100 mm, and connects the upper surface 9 and the lower surface 10 as shown in FIG. A communication groove 12 is provided in the water passage hole 11 and the lower surface 10. Excess water accumulated on the upper surface 9 of the cushion body flows out of the communication groove 12 of the lower surface 10 through the water hole 11. Further, when the protrusion 13 is provided on one side of the cushion body 6 and the recess 14 is provided on the other side, the cushion 6 is
Can be spread on the resin sheet 5 while fitting them. The cushion body 6 can protect not only the resin sheet 5 but also the waterproof layer 4 by absorbing the weight of the soil and the external impact force.

The filter material 7 is laid on the cushion body 6 and has a large function of allowing moisture to pass therethrough but preventing the outflow of the soil. This filter material 7 is a mat body having a thickness of 5 to 30 mm made of a nonwoven fabric made of a synthetic resin such as polyester, nylon, vinylon or the like, or a natural fiber, and an inorganic fiber such as a glass fiber.

[0011]

As described above, in the waterproof structure for root prevention according to the present invention, the resin sheet prevents the roots of the plant trees from penetrating and protects the waterproof layer laid on the ground surface, and furthermore, a strong joint by heat fusion. Because it has a portion, it also prevents root from entering from the joint, the cushion body absorbs the weight of the soil and the external impact force to protect the resin sheet and waterproof layer, and the filter material is This water is discharged to the outside through the cushion material by leading the surplus to the lower cushion body, which has the effect of improving drainage. Further, since the resin sheet is made white, it is difficult to absorb solar heat at the time of construction, so that heat shrinkage of the sheet does not occur and construction is facilitated.

[Brief description of the drawings]

FIG. 1 is a sectional view of a waterproof structure for root protection according to the present invention.

FIG. 2 is a perspective view of a cushion body used in the root-proof waterproof structure of the present invention.

FIG. 3 is a side view of a filter material used in the root-proof waterproof structure of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waterproof structure for root prevention 2 Underground 3 Soil 4 Waterproof layer 5 Resin sheet 6 Cushion body 7 Filter material 11 Water hole 12 Communication groove

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁶ , DB name) A01G 7/00 602 E04D 5/06 E04D 5/10 E04D 5/12 E04D 11/00

Claims (1)

(57) [Claims] 1. A waterproofing structure for roots interposed between an underground and a soil planted with a plant, wherein a thermoplastic resin is used as a material for the waterproofing structure on a waterproofing layer laid on a ground surface. A white resin sheet, a cushion body provided with a vent hole at least on the lower surface and a water passage hole communicating the upper and lower surfaces,
A waterproof structure for root prevention, characterized in that filter materials that allow excess water to pass through but prevent the outflow of guest soil are sequentially laminated.