JP4401936B2 - Drainage structural sheet - Google Patents

Description

The present invention relates to a drainage structure sheet embedded in a tunnel wall surface to release spring water.
In particular, the present invention relates to a drainage structure sheet that is excellent in strength, flexibility, and water permeability and that improves the workability of field workers.

Conventionally, a structure shown in FIG. 8 is known as a structural sheet for drainage (see Patent Document 1).
The drainage structure sheet, that is, the spring water treatment sheet material, has a treatment sheet material 100.
The treated sheet material 100 is made of polypropylene resin or vinyl chloride resin, is non-water-permeable, and is formed in a belt shape.
A concave groove 100a is formed near the center of the processing sheet material 100 in the width direction, and the elastic groove 101 is filled in the concave groove 100a.

The elastic member 101 has a high elasticity and strength by depositing a large number of monofilaments in a random loop shape and depositing them in a flat plate shape, and is excellent in durability.
As a material of the elastic member 101, a polypropylene resin is used from the viewpoint of being alkaline, concrete and long-term stable with respect to concrete and mortar, and having no polarity and free lime.
And in order to hold | maintain the elastic member 101 with which the concave groove 100a of the process sheet material 100 was hold | maintained, it is covered with the nonwoven fabric 102.
On the other hand, holding cylinder portions are provided on both side ends of the processing sheet material 100, and a mounting belt 103 made of a soft elastic material is inserted therethrough.
Further, a crossing tape and a number (not shown) are pasted and displayed on the processing sheet material 100, and the construction progress degree can be confirmed.

JP 2002-54396 A

However, in the spring treatment sheet material described above, since the elastic member 101 is filled as a flat plate having a certain area, the flexibility of the water flow region is poor. When laying the sheet material, the drainage structure sheet does not fit along the curved surface of the wall surface, and the workability is poor.
For this purpose, the porosity of the monofilament must be increased to improve the bending.
However, when the porosity is increased, as a result, the strength of the water flow area is reduced, which causes a contradiction.

The present invention has been made on the basis of such background technology, and has been made to overcome the contradictory problems of the background technology described above.
That is, an object of the present invention is to provide a drainage structure sheet that can simultaneously solve the contradictory matters between improvement in flexibility and improvement in water permeability in a water passage.

  Thus, as a result of earnest research on the background of such problems, the present inventor can solve the above problems by holding a plurality of water-permeable pipes on a sheet material at intervals. The present invention has been found out and the present invention has been completed based on this finding.

That is, the present invention is (1) a drainage structure sheet having a plurality of water-permeable pipe materials and a sheet material for inserting and holding the water-permeable pipe materials , wherein the sheet material is impermeable to water. A plurality of hollow portions are formed by joining the first support sheet and the second support sheet at intervals. A water-permeable pipe material is inserted into the hollow portion, and a fiber belt having mesh mesh for attachment is attached to an end portion in the length direction of the first support sheet. A pair of line marks is present in the drainage structure sheet formed in plural along the longitudinal direction of the water-permeable pipe material at regular intervals .

Further, the present invention is (2), in the sheet material, the second support sheet consists in drainage structured sheet according to the above (1) is narrower than the first supporting sheet.

Moreover, this invention exists in the structure sheet | seat for drainage as described in said ( 1 ) currently joined by the sewing of ( 3 ) and a said 1st support sheet and a 2nd support sheet.

The invention also relates to (4), bonding of the first support sheet and the second support sheet, there is provided a drainage structure sheet 1 according to the above (1) which have been made by bonding.

Moreover, this invention exists in the structural sheet for drainage as described in said ( 1 ) whose ( 5 ) and a said 2nd support sheet are mesh sheets.

In addition, as long as the objective of this invention is followed, the structure which combined said (1) to ( 5 ) suitably is also employable.

According to the present invention, a plurality of water-permeable pipe materials are provided, strength and water permeability are ensured, and these water-permeable pipe materials are provided at intervals, so that they exist between the water-permeable pipe materials. The sheet material can be easily bent, and the flexibility of the water passage area is improved.
The flexibility of the entire drainage structural sheet is improved and the workability is improved.
Further, the water-permeable pipe material can ensure sufficient strength due to its shape.
Since the attaching fiber belt is attached to the end portion in the length direction of the first support sheet, it can be reliably fixed by a stopper during construction.
Moreover, the laying length can be accurately confirmed by forming a plurality of line marks opposed to each other in the width direction at regular intervals along the longitudinal direction of the water-permeable pipe material.

The best mode for carrying out the present invention will be described below with reference to the drawings (schematic diagram).
Drawing 1 is an explanatory view showing one embodiment of the drainage structure sheet of the present invention, and (a) shows the whole and (b) expands and shows the water-permeable pipe material.
The drainage structure sheet 1 includes a water-permeable pipe material 2 for securing strength and water permeability, and a sheet material 3 for inserting and holding the water-permeable pipe material 2.
Three water-permeable pipe members 2 shown in this example are arranged in parallel.

The water-permeable pipe material 2 is formed, for example, by forming a mesh-like sheet into a tubular shape or knitting a monofilament into a tube shape, and is hollow because it is circular in cross section. It has high strength and high water permeability.
In addition, although this structural sheet 1 for drainage is elongate and has fixed length, FIG. 1 shows a part of the longitudinal direction (drawings demonstrated below are also the same).
Further, the direction perpendicular to the longitudinal direction in which the water-permeable pipe material 2 is disposed will be described as the width direction of the drainage structure sheet 1.

The sheet material 3 includes a first water-permeable first support sheet 4 and a water-permeable second support sheet 5 bonded to the first support sheet 4.
The second support sheet 5 shown here is usually narrower than the first support sheet 4.
As a material of the first support sheet 4, a synthetic resin material, for example, a polyethylene resin, a polypropylene resin, a vinyl chloride resin, or the like can be used.
As the second support sheet 5, a synthetic resin material is also used, and a mesh sheet is preferably adopted as the form, and sufficient water permeability can be obtained.
As long as water permeability can be secured, this mesh can take various shapes such as a square, a rectangle, and a circle.

The first support sheet 4 and the second support sheet 5 are joined at intervals to form a plurality of hollow portions 6. As a result, the water-permeable pipe material 2 can be inserted into the hollow portions 6. Yes.
Here, the first support sheet 4 and the second support sheet 5 are joined by sewing, bonding, or the like according to the material.

At the end in the width direction of the first support sheet 4, a fiber belt 7 for attachment is provided at the ear of the surface opposite to the side on which the second support sheet 5 is sewn (referred to as a construction-compatible surface). .
In order to fix the fiber belt 7 for attachment to the first support sheet 4, it can be sewn or fixed using an adhesive.
Although the strength of the ear portion is greatly improved by the fiber belt 7 for attachment, there is an advantage that a certain fixing force as described below can be exhibited at the time of attachment.

A woven fabric or a knitted fabric is adopted as the form of the fiber belt 7 for attachment in the ear portion.
For example, in the case of a knitted fabric, a polyethylene monofilament having a wire diameter of 320 dt knitted with a vertical density of 14.5 / ４．５ can be used.
Since such a fiber belt is a woven fabric or a knitted fabric, mesh mesh is present. When a drainage structural sheet is attached to a wall surface, when a stopper (for example, a nail) is driven into the sheet material 3, the mesh is present. The nail is firmly fixed by tightening the eyes.
Incidentally, in the above-described conventional spring water treatment sheet material, since the attachment belt is a soft elastic material, a nail or the like may penetrate, but this is not the case in the present invention.

FIG. 2 shows a state in which the drainage structure sheet 1 is bent.
As shown in the figure, the sheet material 3 existing between the water-permeable pipe members 2 can be easily bent in the width direction to bend the entire drainage structure sheet.
That is, since the portion of the sheet material 3 existing between the water-permeable pipe materials 2 is bent, unlike the conventional spring water treatment sheet material as shown in FIG. Can be bent.

Now, FIG. 3 has shown the state which looked at the structural sheet 1 for drainage from the 1st support sheet 4 side.
Line marks L are formed on the upper and lower ends of the first support sheet 4 in the width direction.
This line is preferably a relatively conspicuous color line, for example, and can be easily applied by applying the first support sheet 4 at the same time as the first support sheet 4 or by applying a colorant after the manufacture. is there.
The fiber belt 7 for attachment is provided in the ear | edge part of the edge part of the 1st support sheet 4, However, If a line is continuously given on this fiber belt 7 for attachment by an appropriate method, it will be for drainage. It is more preferable that a line is displayed on the entire structure sheet.

4A and 4B are explanatory views showing a method of laying the drainage structure sheet 1, wherein FIG. 4A shows a laying method when the wall surface is a curved surface, and FIG. 4B shows a laying method when the wall surface is a flat surface.
The drainage structural sheet 1 is laid and fixed by driving a stopper (for example, a nail 8) from above onto a wall surface T corresponding to, for example, the inner wall of a tunnel.

The drainage structure sheet 1 is embedded in the tunnel wall surface by spraying concrete or the like on the first support sheet 4.
Since the first support sheet 4 is a non-water-permeable thin resin sheet, the stopper penetrates through the first support sheet 4 even when the stopper is directly driven into the first support sheet 4 and fixed to the wall surface T during construction. I can not demonstrate the fixing force.

However, since the fiber belt for attachment is provided, such a problem does not occur, and the drainage structure sheet 1 including the first support sheet 4 can be securely fixed (this reason is described above). As you did).
According to FIG. 4 (A), it can be understood that the water-permeable region including the water-permeable pipe material 2 is bent and fitted along the wall surface.

FIG. 5 shows the first support sheet 4 on the side where the line mark L is formed.
As shown in FIG. 5, the first support sheet 4 is formed with a pair of line marks L facing in the width direction along the longitudinal direction of the sheet material 3.
Moreover, the pair of line marks L is formed in plural (two locations in the figure) at regular intervals.
At the time of construction, when the line marks L facing each other are cut, one line mark L remains at both ends of the separated sheet material 3.
Therefore, it is possible to accurately confirm the laying length with reference to the cut position in the transverse direction of the product (the line mark L remains).

Incidentally, in the conventional spring water treatment sheet material described above, after cutting, the tape remains only at one end portion of the cut sheet, and it is difficult to check the laying length because the tape cannot be used as a reference.
As described above, in the drainage structure sheet 1 of the present invention, the water-permeable region including the water-permeable pipe material 2 can ensure sufficient strength and water permeability.

Since these water-permeable pipe materials 2 are provided at intervals, if the sheet material 3 existing between the water-permeable pipe materials 2 is bent, the entire drainage structure sheet can be bent relatively easily. .
Moreover, since the fiber belt for attachment is attached to the edge part of the length direction of a 1st support sheet, it can fix reliably with a stopper at the time of construction.
In addition, since a plurality of line marks opposed in the width direction are formed at a constant interval along the longitudinal direction of the water-permeable pipe material, the laying length can be confirmed accurately.

Although the present invention has been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that other various modifications are possible without departing from the essence thereof.
For example, in the above-described embodiment, the example using the three water-permeable pipe members 2 has been described. However, as shown in FIG.
That is, the number of bends does not matter so much as to bendability, and the drainage structure sheet 1 can be easily bent as long as the joint portion of the sheet material 3 exists between the water-permeable pipe members 2.

Further, in the above-described embodiment, the example in which the first support sheet 4 and the second support sheet 5 are joined in a linear manner by sewing or adhesion has been described. There is a form.
In these methods, since the area of the joint portion is large, it is preferable that the second support sheet 5 is fixed to the first support sheet 4 by adhesion.
In the drainage structure sheet shown in FIG. 7A, the first support sheet 4 is spread in a planar shape, and the second support sheet 5 is in a state of surrounding most of the water-permeable pipe material 2. .

On the other hand, in the drainage structure sheet shown in FIG. 7B, the second support sheet 5 is planar, and the first support sheet 4 surrounds most of the water-permeable pipe material 2.
Since the 2nd support sheet 5 side turns into a construction surface side, it is excellent in the point of workability compared with the case of Fig.7 (a) which made the 1st support sheet 4 flat.

Further, in the above-described embodiment, the second support sheet 5 is narrower than the first support sheet 4, but it is also possible to make both of them the same width. This increases the overall strength.
Furthermore, in the embodiment described above, the line mark L is a continuous line, but it is naturally possible to use a broken line, a chain line, a decoration line, or the like.

Moreover, although embodiment mentioned above demonstrated the example which used the 2nd support sheet 5 as the mesh sheet, not only a mesh sheet but a nonwoven fabric with water permeability, for example is also employable.
For example, when a mesh sheet having a mesh size of about 1 to 5 mm is employed and soil particles are likely to enter, a nonwoven fabric (usually 1 mm or less) is used.
Furthermore, when the strength of the entire drainage structural sheet is required, the second support sheet and the first support sheet can be of the same width.
Furthermore, the fiber belt for attachment may be provided on either the surface corresponding to the construction of the first support sheet 4 or the opposite surface, or both surfaces.

Drawing 1 is an explanatory view showing one embodiment of the structure sheet for drainage of the present invention, (a) shows the whole and (b) shows water-permeable pipe material. FIG. 2 is an explanatory view showing a state where the drainage structure sheet 1 of FIG. 1 is bent. FIG. 3 is an explanatory diagram showing a state in which the drainage structure sheet of FIG. 1 is viewed from the first support sheet side. 4A and 4B are explanatory views showing a method of laying the drainage structure sheet 1, wherein FIG. 4A shows a laying method when the wall surface is a curved surface, and FIG. 4B shows a laying method when the wall surface is a flat surface. FIG. 5 is an explanatory view showing the first support sheet on the side where the line marks are formed. FIG. 6 is an explanatory view showing a state when the number of the water-permeable pipe members 2 of the drainage structure sheet of FIG. 1 is increased. FIG. 7 is an explanatory view showing a drainage structure sheet formed by bonding the first support sheet and the second support sheet by adhesion. FIG. 8 is an explanatory view showing a conventional drainage structure sheet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Structure sheet for drainage 2 Water-permeable pipe material 3 Sheet material 4 1st support sheet 5 2nd support sheet 6 Hollow part 7 Fiber belt 8 Nail 100 Treatment sheet material 100a Groove 101 Elastic member 102 Non-woven fabric L Line mark T Wall surface

Claims (5)

A plurality of water-permeable pipe materials,
A sheet material for inserting and holding the water-permeable pipe material;
A drainage structural sheet comprising:
The sheet material has a first support sheet having water impermeability and a second support sheet having water permeability,
The first support sheet and the second support sheet are joined at intervals to form a plurality of hollow portions,
A water-permeable pipe material is inserted into the hollow part,
A fiber belt having mesh mesh for attachment is attached to an end portion in the length direction of the first support sheet,
A drainage structure sheet, wherein a plurality of paired line marks are formed at regular intervals along the longitudinal direction of the water-permeable pipe material in the width direction. In the sheet material, the second support sheet is characterized in that narrower than the first supporting sheet, drainage structured sheet of claim 1, wherein. The first joint of the support sheet and the second support sheet is characterized by being made by sewing, drainage structured sheet of claim 1, wherein. The first joint of the support sheet and the second support sheet is characterized by being made by bonding, drainage structured sheet of claim 1, wherein. Said second support sheet is characterized in that a mesh sheet, drainage structured sheet of claim 1, wherein.

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