JP3955720B2 - Spring water treatment sheet material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a drainage channel for spring water that covers a square plate or nut at the base end of a rock bolt that is driven through a primary lining concrete wall in the construction of a tunnel wall mainly composed of rock bolts and shotcrete. It is related with the spring water treatment sheet material which functions as.
[0002]
[Prior art]
Conventionally, in the construction of a concrete wall of a tunnel inner wall, a construction method in which a non-water-permeable waterproof sheet is interposed between a primary lining concrete wall and a secondary lining concrete wall is widely known. That is, according to this construction method, a large number of lock bolts are driven along the circumferential direction on the primary lining concrete wall formed by spraying concrete on the inner wall surface of the tunnel, and the primary lining A square-shaped square plate is fitted to the base end portion of the lock bolt protruding from the concrete wall, and a nut that presses the square plate against the primary lining concrete wall is screwed. If the water stop sheet is damaged or spring water comes out due to multiple lock bolts or square plates arranged in the circumferential direction, cover the base end of the lock bolt or the square plate so that it will not fall during the work. A belt-like spring treatment sheet material made of synthetic resin is attached to the wall surface. More specifically, in the construction, first, the spring treatment sheet material is directed to the base end portion of the lock bolt arranged on the inner peripheral surface of the tunnel, and to the square plate, and then along both side edges. Metal strips were arranged from above, respectively, and concrete nails were placed on the inner wall surface of the tunnel at predetermined intervals via the strips. In this way, the surface of the primary lining concrete wall to which the spring water treatment sheet material is attached is covered with the waterproof sheet, and the secondary lining concrete is sprayed on the surface.
[0003]
[Problems to be solved by the invention]
However, since the spring water treatment sheet material is in contact with the surface of the primary lining concrete wall, metal strips must be placed along the edges of both sides, requiring work by a large number of people. Because it is very troublesome, and because a concrete nail is hit from the top of a metal strip, the tip of the concrete nail slips off when it is driven, and the work involves a lot of trouble and difficulty, In addition, the concrete nails that bounced back hit the workers. In this way, since many spring water treatment sheet materials are attached to the surface of the primary lining concrete wall, the work efficiency was extremely low and the construction period was prolonged, so the construction period was shortened and construction costs were reduced. It was.
Therefore, the present invention has been made to solve the above-mentioned problems, and it is possible to improve work efficiency, shorten the work period, and reduce the construction cost by facilitating and simplifying the installation of the spring water treatment sheet material. The purpose is to provide a spring water treatment sheet material.
[0004]
[Means for Solving the Problems]
In order to achieve such an object, the spring water treatment sheet material according to the present invention deposits a large number of monofilaments made of polypropylene resin in a random loop shape along the longitudinal direction on one surface side of a sheet body formed in a strip shape. Then, an elastic member having water permeability formed in a mat shape is arranged and fixed, and a mounting belt made of a soft elastic material such as a synthetic resin is integrated along the longitudinal direction of the side edge of the seat body. It consists of the structure provided in. And when spring water comes out, a non-water-permeable sheet | seat main body is used, and when spring water does not come out, a water-permeable thing may be used. The attachment belt is preferably inserted through holding cylinder portions provided along both side edges of the seat body. In addition, as the elastic member fixing means, for example, a means for interposing an elastic member between one side surface of the sheet main body and a non-woven fabric that is a water-permeable support member attached to the surface is attached.
[0005]
Since the mounting belt is integrated on the side edge of the seat body, there is no need for a metal strip as an auxiliary material to be prepared separately, which makes the operation easy and simplified, and there is no bounce of concrete nails. It is . Its to the proximal end of the lock bolt elastic member is pouring, damage of the seat body from covering the angular plate or the base end portion of the nut is prevented. Moreover, since it has water permeability, it functions as a drainage path for spring water, and free lime does not easily adhere.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a spring water treatment sheet material according to the present invention will be described with reference to the drawings. FIG. 1 is a rear perspective view of the spring water treatment sheet material, and FIG. 2 is a plan sectional view of the same. The spring water treatment sheet material A is made of polypropylene resin or vinyl chloride resin, is non-water-permeable, and has an elastic member 2 arranged and fixed on one surface side of the sheet body 1 formed in a strip shape (usually 10 to 12 m). That is, a non-woven fabric 3 as a support member in which both end portions are bonded along the longitudinal direction is fixed to one surface side of the sheet main body 1, and between the sheet main body 1 and the non-woven fabric 3, the non-woven fabric 3 side The elastic member 2 is attached to. The seat body 1 may be a non-water-permeable material when spring water is assumed, and a water-permeable material such as a nonwoven fabric may be selected when spring water is not assumed.
[0007]
The elastic member 2 is made of, for example, polypropylene resin, is formed in a mat shape by depositing a large number of monofilaments in a random loop shape, and is fixed to the nonwoven fabric 3 with a stapler 4. The reason why the polypropylene resin was selected is that the polypropylene resin is stable to alkali, concrete, and mortar for a long period of time, and has no polarity and does not adhere free lime, and by depositing a large number of monofilaments in a random loop shape. It has high elasticity and strength and is also excellent in durability. Further, by increasing the opening ratio between the loop-shaped monofilaments, the water collection and drainage functions are improved, and the drainage flow path of spring water is sufficiently secured. Further, a predetermined length (for example, about 50 cm) is attached and attached, and in some cases, it may be formed into a particularly desired dimension or a desired curved shape.
[0008]
The nonwoven fabric 3 that is the support member is selected from a material that has water permeability and that is not easily damaged by water or the like, but is not limited to a sheet shape that covers the elastic member 2 as in the present embodiment. Is omitted, for example, a tape-like one disposed on both sides of the elastic member 2 and bonded and fixed together with the sheet main body 1 may be used.
[0009]
Then, both side end sides 1a, 1a of the sheet body 1 are folded back to one side surface with a predetermined width, and the folded tip edge is integrally sewn 5 to the sheet body 1, thereby holding cylinder portions along the longitudinal direction thereof. 6 is provided. An attachment belt 7 made of a soft elastic material is inserted into each holding cylinder portion 6. The attaching belt 7 is fixed to the holding cylinder portion 6 with a stapler 8. The mounting belt 7 has substantially the same length as the seat body 1, and is a soft elastic material such as a synthetic resin material, rubber, or synthetic rubber material. Any material can be used as long as it can be crimped to the concrete wall surface and can easily stretch the sheet body 1 without breaking.
[0010]
The spring water treatment sheet material A according to the present invention has the above-described configuration, and the usage method will be described next. FIG. 3 is a perspective view showing a state where the spring water treatment sheet material A is attached on the inner wall surface of the tunnel. After the primary lining concrete is sprayed on the inner wall surface, a large number of lock bolts 9 are driven along the circumferential direction of the primary lining concrete wall W1 to form the primary lining concrete wall. A square-shaped square plate 10 is fitted to a base end portion 9a of the lock bolt 9 protruding from W1, and a nut 11 is screwed. The nut 11 is screwed to press the square plate 10 against the primary lining concrete wall W1. Reference numeral 12 denotes a synthetic resin cap that is attached to the nut 11. The end face of the lock bolt 9 has a spherical shape in order to protect the water stop sheet S that will be described later from being broken by the base end 9 a of the lock bolt 9 or the nut 11. ing.
[0011]
Next, as shown in FIG. 4, the elastic member 2 is covered with the cap 12 fitted to the base end portion 9 a so as to correspond to each of the lock bolts 9 that are repeatedly driven along the circumferential direction of the tunnel. In this state, the spring water treatment sheet material A is temporarily pressed, and a plurality of concrete nails 13 are sequentially driven into the temporary lining concrete wall surface W1 via the attachment belt 7 on either side. In this way, the mounting belt 7 is provided in advance, and it is only necessary to drive the concrete nails 13 in order along this, so that the trouble of preparing it as an auxiliary material like a conventional metal strip is eliminated. . In addition, since the attachment belt 7 is inserted into the holding cylinder portion 6, it can be handled integrally with the seat body 1 and is convenient. Further, even if the concrete nail 13 is driven, the concrete nail 13 does not bounce back and can be driven easily and safely.
[0012]
Furthermore, since both sides of the seat body 1 are pressed by the attachment belt 7, looseness on both sides of the seat body 1 is prevented, and construction reliability is improved. Moreover, if the length is usually the inner peripheral surface of the tunnel and is set to 10 or 12 m as a half of the peripheral length, for example, the spring water treatment sheet material A can be attached to both sides from the central top end. But installation work is possible. Thus, as shown in FIG. 5, the spring water treatment sheet material A is attached to the primary lining concrete wall surface W1. The attached spring water treatment sheet material A is pasted and displayed with a white transverse tape 14 (referred to as a measuring line) and a number 15 at an interval of 100 cm. This is so that it can be easily confirmed whether the construction is proceeding in order according to the procedure.
[0013]
Further, since the elastic member 2 is interposed between the non-woven fabric 3 on the primary lining concrete wall surface W1 side and the sheet body 1, a drainage passage H is formed, so that the primary lining concrete wall surface W1 as shown by a chain line in FIG. Even if spring water comes out from the lock bolt 9 after the secondary lining concrete W2 is sprayed over the entire surface through the water-stop sheet S, the drainage function can be surely drained through the drainage passage H. It will not be damaged. The elastic member 2 is also useful for preventing damage to the sheet main body 1 and the waterproof sheet S due to its elastic action.
[0014]
In the present embodiment, the configuration in which the attachment belts 7 are integrally provided on both sides of the seat body 1 is shown, but this is a case where the spring water treatment sheet material A is attached in the longitudinal direction, that is, in the lateral direction, In the case of mounting in the horizontal direction, the sheet body 1 is formed in a cylindrical shape, and the elastic member 2 is disposed and fixed along the longitudinal direction thereof, and one side (the upper side) of the cylindrical sheet body 1 Even if only the attachment belt 7 is provided, the object and effect of the present invention can be sufficiently achieved.
[0015]
【The invention's effect】
As described above, the spring water treatment sheet material according to the present invention has water permeability formed in a mat shape by depositing a large number of monofilaments made of polypropylene resin in a random loop shape on one side of the sheet body. An elastic member is disposed and fixed, and a cylindrical holding cylinder portion is provided at a side edge of the seat body, and a mounting belt made of a soft elastic material is inserted into the holding cylinder portion, so that spring treatment Attaching the sheet material to the inner peripheral surface of the tunnel requires no additional material such as a metal strip, and it is only necessary to drive the concrete nails along the mounting belt as it is, making installation extremely easy and simplified. Work efficiency is improved. Thereby, there is an effect that the construction period can be greatly shortened and the construction cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a rear perspective view of a spring water treatment sheet material according to the present invention.
FIG. 2 is a plan sectional view of the same.
FIG. 3 is a perspective view showing a state where the spring water treatment sheet material is attached on the inner wall surface of the tunnel.
FIG. 4 is a plan sectional view showing a state where a spring water treatment sheet material is attached on the inner wall surface of the tunnel.
FIG. 5 is a perspective view showing a state where the spring water treatment sheet material is attached on the inner wall surface of the tunnel.
[Explanation of symbols]
1 Sheet body 2 Elastic member 3 Support member (nonwoven fabric)
4 Stapler 6 Holding cylinder 7 Attachment belt A Spring water treatment sheet material

Claims (3)

An elastic member with water permeability that is formed in a mat shape by depositing a number of monofilaments made of polypropylene resin in a random loop shape along the longitudinal direction of the sheet body formed in a belt shape In addition, a spring water treatment sheet material, wherein a mounting belt made of a soft elastic material such as a synthetic resin is integrally provided along a longitudinal direction of the side edge of the sheet body. Before SL on the side edges of the seat body according to claim 1, wherein the inserting the mounting belt made of soft elastic material such as synthetic resin into the holding cylinder portion provided with a holding cylinder portion of the cylindrical along its longitudinal direction Spring water treatment sheet material. The spring treatment sheet material according to claim 1, wherein the sheet main body is formed from a non-water-permeable material.

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