JPH03147919A - Texture for spraying impervious sheet execution method and spraying impervious sheet execution method by field execution - Google Patents

Abstract

PURPOSE:To secure the uniform width of a joint by spraying a permeable material such as rubber asphalt emulsion, etc., to the whole surface of the knitted texture after the low load extending knitted texture is so laid on the surface of the earth that joint sections are partially overlapped each other. CONSTITUTION:The knitted texture having low load extending efficiency extending more than 10% with load of 1kg each in length and width as the transverse knitted texture, more than 0.5mm in thickness and the size within range of 0.01g/cm<2>-0.2g/cm<2> of bulk specific gravity is formed. Then, after the ground is excavated to form a recess section 10, the peripheral surface of the recess section 10 is excavated for grooves 12. After that, the ends of the knitted textures 14 are partially overlapped each other to the internal surface of the recess section 10, joint sections are made to lay, and sticks are passed through the joint sections to tentatively fix. Rubber asphalt emulsion A is sprayed to the whole surface of the knitted textures 14. In addition, after the ends of the knitted textures 14 and bent into the grooves 12, soil 30 is thrown into the grooves 12 to backfill.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a water-shedding sheet construction method used for water-shielding waste disposal sites, reservoirs, waterways, etc. In particular, the present invention relates to a water-shielding sheet construction method used for water-shielding waste disposal sites, reservoirs, waterways, etc. The present invention relates to a construction method and a woven fabric for the construction method.

(Conventional technology) Conventionally, construction methods for the purpose of blocking water in waste treatment plants, reservoirs, waterways, etc. include a method in which a water-blocking sheet formed on the factory side is laid on site and joint treatment is performed, and A method was used in which a cement-based waterproofing material was sprayed onto a sheet that had been laid down.

However, the former method uses adhesive or welding for joint processing, which often becomes a weak point and causes water leakage.Additionally, when laying the sheet, it is necessary to shape the ground surface, and the There were problems in that it did not adhere to the surface and required a lot of time and effort for transportation and joint processing.

On the other hand, in the latter method, the water-blocking property is ensured through on-site construction, so the workability is better compared to the former method, but since the tensile strength of the waterproof material is low, there are problems in maintaining the water-blocking property for a long time. was there.

Therefore, in order to solve such problems, the special public
As in Japanese Patent No. 46983, a construction method has been proposed in which a nonwoven thread is laid on the ground surface and then various materials are sprayed onto the entire surface of the nonwoven fabric to form a waterproof layer.

However, the construction method using nonwoven fabric as disclosed in the above-mentioned publication has the following technical problems.

(Problems to be Solved by the Invention) In other words, in the construction method using the nonwoven fabric, there is a risk of breakage when a person walks on the sheet due to its low tensile strength, and the elongation rate of the nonwoven fabric is low. If the ground surface has large irregularities, the installation work will be difficult, and wrinkles may occur during installation, and there is a risk of damage if the part does not fit the ground surface and a load is applied from above. There were problems such as not being able to secure the width.

The present invention was made in view of these conventional problems, and its purpose is to provide a material that has high tensile strength and elongation, and that fits well even on highly uneven ground surfaces.
Our objective is to provide a woven fabric for water-shielding sheet construction method for spraying that can ensure a uniform joint width, and a water-shielding sheet construction method for on-site spraying.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides spraying as a woven fabric for water-blocking sheet construction method, a flat knitted fabric with a weight of 1 kg in each length and width.
It has low-load extensibility, elongates by 10% or more under a load of 0.51% or more, has a thickness of 0.51% or more, and has a bulk specific gravity of 0.51% or more. 01 g/
cj ~0. It is characterized by having a size within the range of 2 g/cm2.

In addition, on-site spraying is a water-blocking sheet construction method in which the joints of woven fabric with low load elongation are laid on the ground surface so that they partially overlap each other, and then a permeable material such as rubber asphalt emulsion is used. is characterized in that it is sprayed onto the entire surface of the woven fabric.

The flat knitted fabric of the woven fabric of the present invention has a structure in which the same system is applied to a large number of needles. When stretched, the loops deform, creating a structure that allows them to expand and contract easily, and is knitted using a flat knitting machine or circular knitting machine.

In addition, when spraying tJ&s fabric and using it in the water-blocking sheet construction method, double knit is preferable to ensure thickness.

The knitting structure of such a flat knitted fabric is not limited, but for example, in a circular knitting machine, the same yarn is supplied to both the needles of the Daicel and the cylinder, so it is as if the needles of the Daicel and the cylinder are knitted. This is preferable because it gives the thickness and texture of two knitted fabrics knotted together.

The woven fabric of the present invention has a load of 1 kg in both the vertical and horizontal directions.
It is necessary to have low-load extensibility that allows the product to elongate more than 10%. If the elongation is less than 10%, it will not fit into the unevenness of the ground surface even if it is hammered after being laid on the ground surface, and it will not rise up in the depressions. become.

On the other hand, for low load elongation, for example, if 1 kg is elongated by more than 300%, if the permeable material is sprayed and impregnated, it will collapse under its own weight and the function of the waterproof layer will deteriorate, so the upper limit is about this level. is desirable.

In order to obtain a low-load elongation of 10% or more in a flat knitted fabric, the yarns constituting the woven fabric are not particularly limited, but examples include spandex yarn that stretches 500 to 600%;
Of course, undrawn yarns that stretch 00 to 400% can also be used, but multifilament false twisted yarns are preferred from the standpoint of bulk and permeability of the rubber asphalt emulsion.

The thickness of the above-mentioned weave can be freely adjusted at the factory side as long as it is 0.5 m+s or more, but it is preferably in the range of 2 to 4 ffi11.If the thickness is within this range, the strength of the cushion will increase when impregnated with a permeable material. If the quality is sufficient, anything beyond that will result in excessive quality.

The permeable material for spraying used in the construction method of the present invention may be any material other than rubber asphalt emulsion as long as it has permeability, elasticity, and abrasion resistance.

The above permeable material? It is desirable that the spraying of -'1 be carried out, for example, on a slope, by temporarily fixing the joint portion of the woven fabric using a skewer or the like.

The permeable material may also be sprayed in some excess so that the material that passes through the fabric permeates the ground surface.

(Function) The woven fabric of the present invention has low load extensibility, so it fits well even on highly uneven ground surfaces, does not wrinkle, and can ensure a uniform joint width.

Also, above: c! Woven fabrics have much greater tensile strength and elongation than conventional non-woven fabrics, so there is less risk of breakage when people walk on the sheet.

On the other hand, in the construction method of the present invention, if a permeable material with low viscosity and excellent permeability, such as rubber asphalt emulsion, is used, it can sufficiently penetrate into both woven fabrics even at the joint where the woven fabrics are polymerized. However, this allows the joint to be firmly integrated, ensuring uniform water-blocking properties.

In addition, by adjusting the amount of spraying of the permeable material and increasing it more than usual, the permeable material can permeate the woven fabric and then permeate the ground surface. Since it can be fixed tightly to the ground surface, it can be installed not only on vertical surfaces and overhanging areas, but also on uneven areas of rocky areas.

Furthermore, since the woven fabric used uniformly accepts the permeable material, it is possible to form a water-blocking sheet of uniform thickness by impregnating it.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 to 3 show an embodiment of the on-site spraying and water-blocking method according to the present invention.

The impermeable sheet construction method shown in the same figure exemplifies the case where the present invention is applied to a waste treatment plant or a reservoir.

In construction, first, as shown in FIG. 1, four sections 10 are formed by excavating the ground, a groove 12 is excavated around the outer periphery of this four section 10, and the excavated surface is shaped as appropriate.

Next, the woven fabric 14 is laid on the inner surface of the recess 10.

The woven fabric 14 used here is the one according to the present invention, and is a yI knitted fabric, which has a resistance of 109 kg under a load of 1 kg in both the vertical and horizontal directions.
Equipped with low load extensibility to elongate 6 or more, thickness is 0.5 or more, and bulk specific gravity is 0.01゜/cd ~ 0-2g
It has a size within the range of /cd.

As shown in FIG. 2, the woven fabric 14 is laid with its ends partially overlapping each other and a joint 16 is provided, and a skewer 18 is fixed to the joint 16. It is temporarily fixed.

Note that temporary fixing using the skewers 18 is not necessarily required on the bottom surfaces of the four parts 10, and may be used only on the slopes of the four parts 10.

When the temporary fixation of the woven fabric 14 is completed, rubber asphalt emulsion A is sprayed onto the entire surface of the woven fabric 14.

In this example, rubber asphalt emulsion A is:
It is sprayed by injection from a nozzle 24 connected to a dual-proportional mixing pump 20 via a hose 22.

A first tank 26 containing the base agent B and a second tank 28 containing the curing agent C are connected to the dual proportional mixing pump 20, respectively.

In addition, in this example, the case where the base material B and the curing agent C are prepared separately and mixed and sprayed using the pump 20 is exemplified, but it is also possible to mix them in advance and spray them using a normal pump. It's okay.

When the spraying of the rubber asphalt emulsion A is completed, the ends of the woven fabric 14 are folded into grooves 12.
If ±30 mm is thrown in and backfilled, the construction is completed, and waste is thrown in or water is stored on the woven fabric 14 impregnated with rubber asphalt emulsion A.

(Effects of the Invention) As described above in the Examples, the following effects can be obtained by using the woven fabric for spraying water-blocking sheet construction method and the spraying water-blocking sheet construction method by on-site construction according to the present invention.

■The woven fabric for the water-blocking sheet construction method is a flat knitted fabric, with 1 piece in each length and width.
It has low-load extensibility that allows it to elongate by more than 10% under a load of kg, so it fits extremely well to uneven ground surfaces.

■With on-site spraying, a water-blocking sheet with high tensile strength and elongation can be obtained with simple joint processing.

■There is extremely little risk of damage even when people walk on the seat, and it has a long service life.

■If you adjust the amount of spraying so that it penetrates to the ground surface, the water-shielding sheet will be tightly fixed to the ground surface, so it can be applied not only to vertical surfaces and overhanging areas, but also to uneven parts of rocky areas. I will not arise.

■A uniform joint width can be ensured.

■A water-blocking sheet with uniform thickness can be obtained.

[Brief explanation of the drawing]

FIGS. 1 to 3 are construction explanatory diagrams showing one embodiment of the on-site spraying and water-blocking sheet construction method of the present invention in the order of steps. 14・・・・・・・・・Woven fabric 16・・・・・・
...Joint part 24...Nozzle

Claims (4)

[Claims] (1) A flat knitted fabric with low-load extensibility that allows it to elongate by 10% or more under a load of 1 kg in both length and width, a thickness of 0.5 mm or more, and a bulk specific gravity of 0.01 g/cm^2 to 0.2 g.
A woven fabric for sprayed water-blocking sheet construction, characterized by having a size within the range of /cm^2. (2) A low-load elongation woven fabric is laid on the ground surface so that the joints partially overlap each other, and then a permeable material such as rubber asphalt emulsion is sprayed over the entire surface of the woven fabric. This is a spray-on waterproof sheet construction method that is applied on-site. (3) After the permeable material permeates the woven fabric,
3. The sprayed water-blocking sheet construction method by on-site construction according to claim 2, wherein the water-blocking sheet is infiltrated into the ground surface. (4) The sprayed waterproof sheet construction method by on-site construction according to claim 2 or 3, wherein the spraying of the permeable material is carried out by temporarily fixing the joint portion of the woven fabric.