JP3253923B2 - Coating structure and method of forming the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a covering structure including at least a temporary buried object and a covering material for covering the temporary buried object .
And a method for forming the same. More specifically,
The present invention provides, for example, such that the temporary buried object buried in the soil can be more easily pulled out, or that the temporary buried material can be more easily pulled out from the cured product of the hydraulic composition. The present invention relates to a coating structure configured to suppress adhesion and friction between the two, and a method for forming the same.

[0002]

2. Description of the Related Art Generally, when a ground foundation structure as a structure such as an earth retaining wall is constructed in a construction work in a construction field and a civil engineering field, for example, an H-shaped steel is loosely inserted into an excavation hole. Injecting and hardening a hydraulic composition such as cement milk or ready-mixed concrete around the H-shaped steel, or embedding (punching), for example, an H-shaped steel as a core material in the hydraulic composition injected into the borehole. Thereafter, the hydraulic composition is cured. It is desired that after the hardening of the hydraulic composition is completed, the H-shaped steel is pulled out of the hardened material and removed so as not to hinder the development of the underground later in the year.

[0003] However, the H-type steel and the cured product of the hydraulic composition are firmly adhered to each other, and in order to remove the H-type steel after the completion of the construction, the operation of pulling out the H-shaped steel from the cured product requires an adhesive strength ( Since considerable labor (tensile force) is required to overcome the adhesive strength, equipment, cost, and days are required.

Therefore, in order to easily perform the above-mentioned drawing operation, conventionally, i) a method of applying a lubricating oil such as wax or grease to the surface of the H-shaped steel in advance, or bonding a water-absorbing resin to the surface of the H-shaped steel. Method using an agent, or i
i) A method of attaching a lubricant to the surface of the H-section steel,
ii) Various methods such as a method of coating an H-shaped steel with a coating material have been proposed.

[0005] As the method of the above i), for example,
Japanese Patent Application No. -58715 proposes to use a core material drawing surface treatment agent comprising a water-absorbing resin and a spreading agent such as a polyester resin, a vinyl resin, an acrylic resin, and a urethane resin. . In addition, for example,
No. 165615 discloses a method for reducing the frictional resistance when pulling out a steel material by using a water-swellable film composed of a water-absorbent resin and a volatile film-forming resin such as natural rubber, synthetic rubber and plastic. Proposed.

As the method ii), for example, Japanese Patent Application Laid-Open No. 6-185054 proposes that a sheet-like lubricant made of superabsorbent fibers be adhered to the surface of a steel material. Further, for example, Japanese Patent Application Laid-Open No. Sho 62-174418
Japanese Patent Laid-Open Publication No. HEI 9-214605 proposes a method of reducing the frictional resistance when pulling out a steel material by using a lubricating tape composed of a water-absorbing resin and a binder.

As the method iii), for example, Japanese Patent Application Laid-Open No. 7-247549 discloses a bag-shaped polymer sheet in which a water-absorbent resin is directly fixed to a base material such as a woven or nonwoven fabric. A method of reducing the frictional resistance when the temporary buried object is pulled out by coating the temporary buried object with the above lubricant has been proposed.

[0008]

However, in a method in which lubricating oil is directly applied to the surface of a core material (temporary buried material) such as an H-shaped steel, the core material cannot often be pulled out and collected due to on-site conditions and the like. However, the effect of reducing the frictional resistance when the core material was pulled out was insufficient. Further, the work of applying the lubricating oil to the surface of the core material is usually performed on site, but it is difficult to secure a vacant lot for performing the application work, and the application operation itself is extremely complicated. There was also the problem of being done.

Also, the method of sticking a lubricant on the surface of the core material is not sufficient in reducing the frictional resistance at the time of drawing, and the operation of sticking the lubricant to the surface of the core material itself is not sufficient. There was also a problem that it was extremely complicated.

[0010] Therefore, in order to facilitate the operation of pulling out the core material such as H-shaped steel, the coated structure, that is, the core material can be more easily pulled out from the cured product of the hydraulic composition. There is a need for a coated structure configured to suppress adhesion and friction of the coating.

[0011] The present invention has been made in view of the above conventional problems, and an object, for example, coating structures can improve the work of pulling the core material such as H-type steel (the provisional buried objects) and An object of the present invention is to provide a method of forming the same.

[0012]

Means for Solving the Problems The present inventors diligently studied a covering structure in order to solve the above-mentioned conventional problems. As a result, the coating structure includes at least a temporary burying object and a coating material covering the temporary burying material, wherein the coating material is a sheet-like base material having a tensile strength of 1 kgf / 2.5 cm or more, and By using a coating structure in which a lubricant layer containing at least a lubricant is formed on the surface of the sheet-like base material and / or the temporarily embedded object, for example, adhesion between the temporarily embedded object and the cured product of the hydraulic composition Can be suppressed,
The present inventors have found that the workability of the operation of pulling out the temporary embedded material from the cured product of the hydraulic composition can be improved, and have completed the present invention.

[0013] That is, in order to solve the above-mentioned problems, a coating structure of the invention according to claim 1 is a coating structure including at least a temporary burying object and a coating material for coating the temporary burying object. The coating material is immersed in ion exchange water for 30 minutes.
Tensile strength of 10 kgf / 2.5c when fully wet
m or more sheet-shaped substrate, and the surface of the sheet-shaped substrate, which is the inner side in the state covered with the temporary buried object
To, contact lubricant layer comprising at least a lubricant is formed
The lubricant is wax and / or grease.
It is characterized in that that.

According to the above configuration, for example, when the coated structure according to the present invention is applied to a structure composed of at least a temporarily embedded object and a cured product of the hydraulic composition, A coating material with strength that does not break even when subjected to external force such as impact force or tensile force generated when burying the buried object suppresses adhesion between the temporarily buried object and the cured product of the hydraulic composition, while lubricating When the agent layer exerts a lubricating effect, the temporary buried object becomes slippery. Therefore, the labor (tensile force) in the operation of pulling out the temporarily embedded object from the cured product of the hydraulic composition can be reduced, and the workability of the operation can be improved. Therefore, according to the above configuration, it is possible to provide a covering structure that can improve the operation of pulling out the temporary buried object. Also wax and / or
Means that the grease has a lubricating or adhesion-preventing effect.
By this, the temporary buried object becomes more slippery. Follow
Work to pull out the temporary buried material from the cured product of the hydraulic composition
Labor (tensile force) can be further reduced
Therefore, the workability of the work can be further improved.
You.

According to a second aspect of the present invention, there is provided a coated structure according to the first aspect, wherein the sheet-like base material comprises a split-fiber nonwoven fabric, a needle,
Punched nonwoven fabric, flat yarn fiber fabric, cotton fabric, hemp
Woven, band-like, synthetic resin and blended fabrics
It is characterized by a shift .

[0016]

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A temporary buried object forming a part of a covering structure according to the present invention is a buried object which is buried on the premise that the buried object is to be withdrawn after use or when it is no longer necessary. Although it is not particularly limited as long as it is a desirable embedded material, in the following description, the temporary embedded material used for a structure at least composed of the above-described coated structure and a cured product of the hydraulic composition Things are taken as an example. That is, in the following description, a covering structure used for the structure will be described as an example.

The above-mentioned structure includes, for example, ground foundation structures such as earth retaining walls and foundations in foundation work in the fields of construction and civil engineering. Examples of the hydraulic composition constituting the structure include various concretes such as soil cement, various mortars, and the like, but are not particularly limited, and are generally used for foundation work in the construction field and the civil engineering field. Any hydraulic composition that is used when constructing a ground foundation structure such as a retaining wall or a base may be used. The hydraulic composition becomes a cured product by curing. The types and combinations of cement, admixtures, admixtures, aggregates, reinforcing materials, and the like contained in the hydraulic composition, that is, the composition of the hydraulic composition are not particularly limited.

Specific examples of the temporary buried objects include H-shaped steel, I-shaped steel, iron columns, concrete piles, poles,
Examples include a tubular pile (hollow pile), a steel sheet pile (sheet pile) as a long plate-shaped pile, a corrugated plate, and the like, but are not particularly limited. Temporary buried objects are generally used when constructing ground foundation structures such as retaining walls and foundations in foundation work in the construction field and civil engineering field, and it is necessary to pull out from the cured product of the hydraulic composition after use Any buried object (core material) may be used. In addition, the shape, length,
The material and the like are not particularly limited.

The coating material forming a part of the coating structure according to the present invention, that is, the sheet-like base material, is used for various external forces applied when the ground substructure is constructed, for example, a temporary buried product or a hydraulic composition. Tensile strength or shear force generated by the application of the weight of the coating structure; impact force or tensile force generated when the coating structure is buried, frictional force between the hydraulic structure and the like; The material is not particularly limited as long as it is made of a material having a strength that does not break even when the external force is applied.

More specifically, the sheet-like substrate needs to have a tensile strength of 1 kgf / 2.5 cm or more.
kgf / 2.5 cm or more, more preferably
It is particularly preferred that it is 30 kgf / 2.5 cm or more. When the tensile strength is 1.0 kgf / 2.5 cm or more, the sheet-like substrate can maintain a strength that does not break even when the external force is applied.

The above tensile strength is 2.5 cm wide and 2 cm long.
After cutting to a size of 0 cm, a test piece (sheet-like base material) immersed in ion-exchanged water for 30 minutes and sufficiently wetted was used, and a tensile test method (tensile strength) of JIS L 1096 (general fabric test method) was used. ), A pulling speed of 20 mm / min and a gripping distance of 10 c
The measurement was performed under the condition of m. It can be determined that the larger the measured value (unit: kgf / 2.5 cm) obtained by the tester, the higher the tensile strength of the sheet-shaped substrate.

As the material of the sheet-like substrate, specifically, for example, a split-fiber nonwoven fabric (for example, Warif “trade name”)
Etc.), carpet, felt, asbestos cloth, asbestos felt,
Non-woven fabrics such as glass fiber non-woven fabric, glass fiber reinforced plastic, stitch-bonded non-woven fabric, needle punched non-woven fabric, etc .; fabrics such as flat yarn fiber fabric, cotton fabric, hemp fabric, band-shaped fabric, band cord, synthetic resin fabric made of polypropylene, etc. Kinds of mixed fabrics, such as woven fabrics obtained by blending polyester fibers and cotton fibers; closed cells and the like inside a material such as polystyrene, polyethylene, polypropylene, vinyl chloride resin, urethane resin, phenol resin, and rubber foam. And / or a foam formed with open cells; an elastomer sheet made of urethane rubber, silicone rubber, fluorine rubber, ether rubber, acrylic rubber, butyl rubber, neoprene (chloroprene rubber), butadiene-acrylonitrile copolymer, natural rubber, or the like; Polyethylene or poly Plastic sheets made of propylene, polyethylene terephthalate, polyamide (nylon), vinyl chloride resin, acrylic resin, etc., leather sheets and wood sheets, waterproofed paper sheets, natural sheets such as cardboard sheets, aluminum, iron, copper, Sheets such as metal sheets made of silver, etc., alloy sheets made of stainless steel, etc., stainless steel fiber sheets, ceramic fiber sheets, metal foils made of aluminum, iron, copper, silver, etc., alloy metal foils made of stainless steel, etc .; polyethylene Net or mesh made of aluminum, polypropylene, polyethylene terephthalate, polyamide (nylon), vinyl chloride resin, acrylic resin, etc., net or mesh made of aluminum, iron, copper, silver, etc., net or mesh made of alloy such as stainless steel, etc. Net mesh like; and the like. One of these materials may be used alone, or two or more thereof may be used in combination (composite).

Of the above-listed materials, since they are more excellent in workability and inexpensive, they are split fiber nonwoven fabric, needle punched nonwoven fabric, flat yarn fiber fabric, cotton fabric, and the like.
Hemp fabrics, belt-like fabrics, synthetic resin fabrics and blended fabrics are particularly preferred.

The thickness of the sheet-shaped substrate may be set according to the material, and is not particularly limited.
It is more preferably in the range of 01 mm to 10 mm, and 0.05
mm to 8 mm is more preferable, and 0.2 mm to 8 mm
Particularly preferred is a range of 5 mm. If the thickness of the sheet-shaped substrate is greater than 10 mm, the flexibility of the coating material may be reduced. In addition, since the coating material becomes bulky, its handling and storage properties may be reduced. If the thickness of the sheet-like base material is less than 0.01 mm, there is a possibility that strength that can withstand external force cannot be maintained.

[0026] Incidentally, the basis weight of the sheet-like substrate may be set according to the material and thickness, but are not particularly limited, in the range of 10g / m ² ~10,000g / m ² still more preferably, in the range of 20g / m ² ~1,000g / m ² is more preferred.

The sheet-like base material, that is, the covering material may be formed in a shape and a size that can cover the temporary buried material. More preferably, it is formed in a bag shape or a tubular shape that can be inserted. By forming the sheet-like base material (that is, the covering material) in a bag shape or a tubular shape, a large and heavy temporary buried object can be more easily and quickly covered, so that the work at the work site can be performed. Properties can be further improved.

The lubricant contained in the lubricant layer which forms a part of the coating structure according to the present invention can exert a lubricating effect when the temporarily embedded material is pulled out from the cured product of the hydraulic composition. There is no particular limitation as long as it exists.

As the lubricant, specifically, for example,
Examples include wax, grease, tar, asphalt, fats and oils, and the like.

As the wax, specifically, for example,
Liquid or solid such as plant wax such as wood wax, cotton wax, etc .; animal wax such as sperm whale oil, beeswax, wool wax, etc .; , But are not particularly limited. Among the waxes exemplified above, petroleum wax is particularly preferable because it is more excellent in terms of lubricity and economy.

As the grease, specifically, for example,
Base oils such as mineral oils, silicone oils (silicone greases), and diester oils have been added to metal soaps such as fatty acid salts such as fatty acid calcium salts and fatty acid sodium salts, bentonite types, silica gel types, copper phthalocyanine types, and allyl urea types. Examples thereof include those obtained by mixing a thickener, but are not particularly limited.

Specific examples of the tar include wood tar and coal tar, but are not particularly limited.

Specific examples of the fats and oils include fatty acids such as oleic acid, lauric acid and stearic acid; derivatives such as synthetic glycerin and polyglycerin; higher alcohols such as branched higher alcohols; Linseed oil, rapeseed oil, castor oil, beef oil, lanolin, margarine, heavy oil; and the like, but are not particularly limited.

One of these lubricants may be used alone, or two or more thereof may be used in combination. Among the lubricants exemplified above, wax and grease are more preferable because they are more excellent in the lubricating effect and the content of the volatile component is small.

The lubricant layer contains a water-absorbing resin and / or
Alternatively, a surfactant may be contained. In this case, the pullability of the temporary buried object can be further improved.

The lubricant layer may contain various additives such as a rust preventive and an antioxidant, if necessary, in addition to the above lubricant, to such an extent that the lubricity of the lubricant is not impaired. May be included.

The method of forming the lubricant layer on the surface of the sheet-like base material and / or the surface of the temporarily embedded material is not particularly limited. Specifically, for example, a method in which a lubricant or the like is dispersed in an organic solvent or the like is used. A method of spraying (spraying) a dispersion (lubricant solution) or a lubricant dispersed in a medium onto the surface of a sheet-like substrate and / or the surface of a temporarily embedded object; brushing the lubricant or the lubricant solution, or A method of applying using a roller;
A method of impregnating the sheet-like base material with a lubricant or a lubricant solution may be employed. Further, after the temporary buried material is covered with the sheet-like substrate, a lubricant layer can be formed on the surface of the sheet-like substrate by the exemplified method. The dispersion applied to the surface of the sheet-like base material and / or the temporary embedding material may be dried if necessary. As a result, a lubricant layer is formed on the surface of the sheet-like substrate (outer surface and / or inner surface) and / or the surface of the temporarily embedded object. When the lubricant is applied by spraying, brushing, or using a roller, the lubricant can be heated as necessary. As a result, the viscosity of the lubricant decreases, so that the coating operation can be easily performed.

The method for preparing the lubricant solution is not particularly limited. In addition, specific examples of the organic solvent include, but are not particularly limited to, methyl alcohol, ethyl alcohol, isopropyl alcohol, benzene, toluene, acetone, methyl ethyl ketone, ethyl acetate, and butyl acetate. . A thickness of about 1 mm is sufficient for the lubricant layer, but is not particularly limited.

That is, in the coating structure according to the present invention, the lubricant layer comprises: i) a surface of the temporary burying object; ii) a surface of the sheet-like substrate which is inside when the temporary burying object is covered; iii) The sheet-like substrate is formed on at least one surface selected from the group consisting of a surface that is outside in a state covered with the temporary burying object. Of these, a lubricant layer is formed on the outer surface of the sheet-like base material in a state where the temporary burying object is covered, in view of economical efficiency (cost required for the operation) and ease of the work of extracting the temporary burying object. Is more preferable. In addition, this allows the surface of the pulled-out temporary buried object to be kept in a clean state.

The ratio of the lubricant to the sheet-like base material or the temporarily buried object, that is, the amount of the lubricant adhered per unit area of the sheet-like base material or the temporary buried object is determined by the surface of the sheet-like base material or the temporary buried object. state (unevenness, etc.), both the composition and the combination may be set according to the working environment, etc., but are not particularly limited, and more preferably in the range of ^{1g / m 2 ~10,000g / m 2} , more preferably in the range of ^{10g / m 2 ~5,000g / m 2} , 20g / m 2 ~2,000g
/ M ² is particularly preferred. The sheet-like substrate 10
The ratio of the lubricant to 0 parts by weight is 1 part by weight to 10,000 parts by weight.
It is more preferably in the range of 00 parts by weight, and 10 parts by weight to 2,
2,000 parts by weight, more preferably 20 parts by weight or more.
Particularly preferred is a range of 1,000 parts by weight.

In the covering structure according to the present invention, the temporary buried object and the covering material are in contact with each other but are not fixed. That is, the coating material forming a part of the coating structure according to the present invention is a non-adhesive (non-fixed) coating material. Therefore, the friction between the temporary buried object and the covering material is small, and the work of pulling out the temporary buried object can be performed extremely easily.

In forming the covering structure, it is desirable to use one covering material for one temporary buried object, but if necessary, two or more covering materials for one temporary buried object may be used. Can also be used. Therefore, as a method of covering the temporary buried object with the covering material and forming the covering structure, for example, a method of sandwiching the temporary buried object between two covering materials formed in a sheet shape can be adopted. Note that, in the present invention, `` coating '' does not necessarily cover the temporary buried object so that the temporary buried object becomes invisible with the coating material, but to the extent that the temporary buried object can be easily pulled out from the cured product of the hydraulic composition. That is, this indicates that the temporary buried object is covered with the covering material to such an extent that the adhesion between the two can be suppressed.

As a method of coating the temporary buried material with the covering material to form a covering structure, specifically, for example, a method of covering the temporary buried material with a covering material formed in a bag shape or a tubular shape,
A method of inserting the temporary buried object into a bag-shaped or tubular-shaped covering material, a method of wrapping the temporary buried object with a sheet-shaped covering material, and a method of fixing the covering material to the temporary buried object using a fixing jig or the like. A fixing method and the like can be adopted, but are not particularly limited. Further, when covering the temporary buried object with the covering material, it is more preferable to cover the temporary buried object with the covering material so as to conform to the shape of the temporary buried object. Thereby, the positioning accuracy (implantation accuracy) at the time of embedding the covering structure is further improved. In addition, as a method of forming the covering material into a bag shape or a tubular shape, specifically, for example, a method of bonding using an adhesive, a method of fusing by heat sealing, a method of sewing, and binding with a wire or a string or the like Although various methods such as a method can be adopted, the method is not particularly limited.

The time when the covering structure is formed, that is, the time when the temporary buried object is covered with the coating material is not particularly limited, and is an appropriate time until the temporary buried object is carried into the work site. It may be an appropriate time while the temporary buried object is being stored at the work site, or may be an appropriate time before the work of burying the temporary buried object. That is, the temporary buried object may be covered with the covering material at the time of burying. When using a covering material formed in a bag shape or a tubular shape, the covering material may be formed in these shapes at the time of embedding.

Temporary buried object, temporary buried object covered with a covering material,
In addition, since the covering structure can be piled up at the work site, it does not take much time for storage. Further, when constructing the structure, the covering structure can be formed at the work site. For example, a lubricant layer is previously formed on the surface of the covering material and / or the surface of the temporary buried object, Materials and temporary buried objects can be piled up at the work site. That is, simplification and rationalization of the work can be appropriately achieved according to the situation of the work site, so that the structure can be quickly constructed.

When the coating material or the temporary buried material on which the lubricant layer is formed is piled, the lubricant layer becomes sticky,
If necessary, a film can be laminated as a coating on the surface of the lubricant layer to prevent it from adhering to other things. Specific examples of the film include films made of thermoplastic resins such as polyethylene, polypropylene, and polyvinyl chloride; regenerated cellulose such as cellophane; and films that do not impair the lubricity of the lubricant. It is not particularly limited as long as it is provided.

The method of coating the temporary buried object with the coating material,
As a method of forming the coating structure, more specifically,
For example, as shown in FIG. 1A, a temporary buried object 2 is lifted using a crane 6, and a string 3 passed through a pulley 5 provided at a tip portion of the crane 6 is attached to the coating material 1. , Bag-shaped or tubular-shaped covering material 1
Is inserted into the temporary buried object 2 so that the worker 4 can put on the string 3 by pulling the string 3 from below, for example, as shown in FIG. The covering material 1 is pulled up, mounted and fixed; the tubular covering material is inserted into the temporary buried object so as to cover it from above, and the upper end portion is fixed, and then the temporary buried object is set using a crane. And then, for example, by an operator pulling a string attached to the lower end of the covering material,
A method of pulling down and attaching the covering material: After placing the covering material formed in a bag shape or a tubular shape on the ground or the like, inserting a temporary buried material into the covering material, and then pulling up the covering material and attaching it. Fixing method: After placing the temporary buried object on the ground or the like, inserting a bag-shaped or cylindrical covering material into the temporary buried object,
Then, the temporary embedded object is lifted, and the covering material is pulled up and mounted and fixed. As shown in FIG. 2A, the temporary embedded object 2 is placed on the sheet-shaped covering material 10 by the crane 6 or the like. After being placed on the temporary embedding material 2 as shown in FIGS. (B) and (c), the covering material 10 is wrapped with the coating material 10, and then the coating material 10 is fixed as shown in FIG. Jig 1
1. A method of fixing using a temporary material embedded between bellows-shaped covering materials; a method of fixing both ends of the covering material to the upper and lower portions of the temporary embedded material; A method in which both ends of the covering material are fixed to the upper and lower parts of the material, and the center part of the covering material is fixed using a wire (number line), a string, a belt, a gum tape, etc .; And hanging the remaining portion of the covering material along the temporary buried object; and the like,
There is no particular limitation. By the above method, the coated structure according to the present invention is formed.

Of the above-mentioned methods, a method of inserting and attaching a covering material formed in a bag shape or a tubular shape to a temporary buried object so that the covering material can be worn from below, and a method of forming the temporary buried object into a sheet shape The method of wrapping with the formed coating material is more preferable because the workability of the coating operation is excellent. In addition, the method of fixing the covering material to the temporary buried object is not particularly limited. Further, as the fixing jig 11, specifically,
For example, a binder such as a cap formed by vertically dividing a tube such as a clothespin, a clip, a rubber hose or a heat insulating foam, a wire (number line), a string, a belt, a gum tape, and the like are included, but not particularly limited. Absent.

As described above, for example, when the coated structure according to the present invention is applied to a structure composed of at least a temporarily embedded object and a cured product of a hydraulic composition, for example, the temporary embedded object A coating material having a strength that does not break even when subjected to an external force such as an impact force or a tensile force generated when embedding the resin suppresses the adhesion between the temporarily embedded material and the cured product of the hydraulic composition, while the lubricant layer Exerts a lubricating effect, so that the temporary buried object becomes slippery. Therefore, since the temporary buried object and the hydraulic composition are suppressed from coming into contact with each other and are separated from each other,
It is possible to reduce the frictional resistance when pulling out the temporary embedded material from the cured product of the hydraulic composition. That is, the labor (tensile force) in the pull-out operation can be reduced, and the workability of the operation can be improved. Therefore, according to the above configuration, it is possible to provide a covering structure that can improve the operation of pulling out the temporary buried object. The collected temporary buried objects can be reused as they are. The covering material remains in the structure even after the temporary buried object is pulled out. For example, when the covering material is fixed to the temporary buried object, the covering material may be pulled out together with the temporary buried object.

In the above description, the coating structure used for the structure composed of at least the temporary buried material and the cured product of the hydraulic composition has been described as an example. The body can also be applied to temporary implants buried in soil. Thereby, the frictional resistance when the temporary buried object is pulled out from the soil can be reduced, and the temporary buried object can be easily pulled out.

[0051]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples, but the present invention is not limited thereto.

Example 1 A wax (manufactured by Palace Chemical Co., Ltd.) was used on both sides of an iron plate (manufactured by Nippon Test Panel Osaka) having a width of 70 mm × a height of 150 mm × a thickness of 0.8 mm as a temporary buried object. ;
Product name ・ High slide WAX TAP-2)
mm. That is, a lubricant layer was formed on both surfaces of the iron plate.

Next, a woven cloth (polyester: cotton / 50: 50 (weight ratio), basis weight 200 g, thickness 0.5 mm) as a sheet-like base material is cut and sewn to obtain a sheet having a width of 80 mm. A bag having a height of 140 mm, that is, a covering material was formed. The tensile strength of the woven fabric is 30 kgf / 2.5
cm and an extremely high value. Then, the iron plate on which the lubricant layer was formed was inserted and attached so that the bag could be worn from below. Thus, a coated structure according to the present invention was produced.

On the other hand, soil cement milk (hydraulic composition) was prepared by mixing water, cement, clay and bentonite in a weight ratio of 25: 12: 16: 0.6. Then, the above bag was embedded in soil cement milk placed in a container. That is, after the coating structure was poured into soil cement milk, the soil cement milk was cured.

Three days after the iron plate was driven, the iron plate was pulled out of the cured product of soil cement milk using a tensile tester. The pulling load required for the drawing operation was 11 kgf, and the iron plate could be easily pulled out from the cured product of the soil cement milk.

Comparative Example 1 A lubricant layer was formed on both surfaces of an iron plate by performing the same operation as in Example 1. Next, the same operation as in Example 1 was performed to prepare soil cement milk, and the iron plate was driven into the soil cement milk.
That is, after the iron plate not covered with the covering material was driven into the soil cement milk, the soil cement milk was cured.

Three days after the iron plate was driven, the iron plate was pulled out of the cured product of soil cement milk using a tensile tester. The pulling load required for the pulling operation was 19 kgf, which was larger than the result of Example 1 described above, and the iron plate could not be easily pulled out from the cured product of the soil cement milk.

Example 2 A lubricant layer was formed on both surfaces of an iron plate by performing the same operation as in Example 1. Next, a felt (a needle-punched nonwoven fabric, a basis weight of 800 g, a thickness of 3.4 mm) as a sheet-like base material is cut and sewn to obtain a width of 80 mm × a height of 140 mm.
, That is, a covering material was formed. The tensile strength of the woven fabric showed an extremely high value of 23 kgf / 2.5 cm.
Then, the iron plate on which the lubricant layer was formed was inserted and attached so that the bag could be worn from below. Thus, a coated structure according to the present invention was produced.

Next, the same operation as in Example 1 was performed to drive the coated structure into soil cement milk, and then the iron plate was pulled out from the cured product of the soil cement milk. The pulling load required for the pulling operation is 4.
The weight was 0 kgf, and the iron plate could be pulled out of the cured product of the soil cement milk very easily.

[Example 3] Felt cut to the size of A4 size plate (manufactured by Fujiko Co., Ltd., needle-punched nonwoven fabric, basis weight 800 g, thickness 3.4)
mm) on the surface (one side) of wax (manufactured by Palace Chemical Co., Ltd .; trade name: High Slide WAX TAP-2)
2.4 g (solid content, 1,000 g / m ² ) was uniformly applied. That is, a lubricant layer was formed on one side of the felt.
Next, the felt having the lubricant layer formed thereon was sewn with the lubricant layer being on the inside, thereby forming a bag body having a width of 80 mm and a height of 140 mm. And
70mm in width so that this bag can be worn from below
An iron plate (manufactured by Nippon Test Panel Osaka) having a height of 150 mm and a thickness of 0.8 mm was inserted and mounted. Thus, a coated structure according to the present invention was produced.

Next, by performing the same operation as that of Example 1, the coated structure was driven into soil cement milk, and then the iron plate was pulled out from the cured product of the soil cement milk. The pulling load required for the pulling operation was 9.
The weight was 0 kgf, and the iron plate could be easily extracted from the cured product of the soil cement milk.

Example 4 A lubricant layer was formed on one side of the felt by performing the same operation as in Example 3. And, on the surface of the lubricant layer, laminated a polyethylene film as a coating,
The tackiness of the lubricant layer was prevented. Next, the felt having the lubricant layer formed thereon is sewn so that the lubricant layer is on the outside, so that the width is 80 mm × the height is 140 mm.
mm bag was formed. Then, an iron plate (manufactured by Nippon Test Panel Osaka) having a width of 70 mm, a height of 150 mm and a thickness of 0.8 mm was inserted into the bag so that the bag could be worn from below. Thus, a coated structure according to the present invention was produced.

Next, after the polyethylene film was peeled off, the same operation as in Example 1 was performed to drive the coated structure into soil cement milk, and then the iron plate was removed from the cured product of soil cement milk. I pulled it out. The pulling load required for the pulling work is 1.5 kg
f, and the iron plate could be pulled out very easily from the cured product of the soil cement milk.

[0064]

According to the first aspect of the present invention, there is provided a coating structure comprising:
As described above, a coating structure including at least the temporary burying material and the coating material covering the temporary burying material, wherein the coating material is immersed in ion-exchanged water for 30 minutes and sufficiently wetted.
Is a sheet-like substrate having a tensile strength of 10 kgf / 2.5 cm or more, and a temporary buried material on the surface of the sheet-like substrate.
A lubricant layer containing at least a lubricant is formed on the inner surface in the covered state, and the lubricant is
And grease .

According to the above configuration, for example, when the coating structure according to the present invention is applied to a structure at least composed of a temporary embedded material and a cured product of a hydraulic composition, for example, A coating material with strength that does not break even when subjected to external force such as impact force or tensile force generated when burying the buried object suppresses adhesion between the temporarily buried object and the cured product of the hydraulic composition, while lubricating When the agent layer exerts a lubricating effect, the temporary buried object becomes slippery. Therefore, the labor (tensile force) in the operation of pulling out the temporarily embedded object from the cured product of the hydraulic composition can be reduced, and the workability of the operation can be improved. Therefore, according to the above configuration, there is an effect that it is possible to provide a covering structure that can improve the operation of pulling out the temporary buried object. Also,
Grease and / or grease lubricate or prevent adhesion
By exhibiting the stopping effect, temporary buried objects can be even more smoothly
Easier. Therefore, the temporary buried material is a cured product of the hydraulic composition.
Labor (pulling force) in the work of pulling from
The workability of the work can be further improved because it can be reduced
The effect that it can be made to play is produced.

As described above, in the coated structure according to the second aspect of the present invention, the sheet-like substrate is made of a split-fiber nonwoven fabric, a knee
Dol punched nonwoven fabric, flat yarn fiber fabric, cotton fabric
Objects, hemp fabrics, belt-like fabrics, synthetic resin fabrics, and blended fabrics
It is a configuration that is one of objects .

[0067]

[Brief description of the drawings]

FIGS. 1A and 1B are schematic perspective views showing a procedure for forming a covering structure according to an embodiment of the present invention by covering a temporarily buried object with a covering material.

FIGS. 2A to 2D are schematic perspective views showing a procedure for forming a covering structure according to another embodiment of the present invention by covering a temporarily buried object with a covering material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coating material 2 Temporary buried thing 10 Coating material

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-247549 (JP, A) JP-A-9-39147 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 9/02

Claims (4)

(57) [Claims] 1. A coating structure comprising at least a temporary buried material and a coating material for coating the temporary buried material, wherein the coating material is sufficiently immersed in ion-exchanged water for 30 minutes.
A sheet-like substrate having a wet tensile strength of 10 kgf / 2.5 cm or more, and a surface of the sheet-like substrate ,
Inside the surface from in a state of covering the temporary buried objects, a lubricant layer comprising at least a lubricant is formed, covering structure, characterized in that said lubricant is a wax and / or grease. 2. The method according to claim 1, wherein the sheet-like base material is a split-fiber nonwoven fabric, a knee
Dol punched nonwoven fabric, flat yarn fiber fabric, cotton fabric
Objects, hemp fabrics, belt-like fabrics, synthetic resin fabrics, and blended fabrics
2. The method according to claim 1, wherein the object is one of
Coating structure. 3. The sheet-shaped substrate inserts the temporary buried object.
The covering structure according to claim 1, wherein the covering structure is formed in a possible bag shape or a tubular shape . 4. The method for forming a coated structure according to claim 1, wherein
Then, the temporary buried object is covered with the temporary buried object.
Wax and / or grease on the side surface
A sheet on which a lubricant layer containing at least a lubricant is formed
Of coated structure characterized by coating with substrate
Method.