KR101954755B1 - Pressure sleeve for preventing buoyancy and buoyancy anchor construction method using the same - Google Patents

Abstract

Disclosed is a buoyancy preventing pressure sleeve capable of advance and later construction in accordance with construction progress. The buoyancy preventing pressure sleeve includes: a lower plate having a predetermined shape; an upper plate spaced part from an upper portion of the lower plate by a certain distance to be provided thereon and provided to have a smaller size than that of the lower plate; a hollow pillar-shaped sleeve penetrating the center of the lower plate and the upper plate and provided between the lower plate and the upper plate; and a concrete watertight bonding plate attached to an inner circumference of the sleeve.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buoyant pressure-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a buoyancy-preventing pressure-tight sleeve, and more particularly, to a buoyancy-preventing pressure-

Generally, in the case of constructing structures such as underground parking lots, underground roads, underground shopping malls, and underground sidewalks, it is necessary to provide a structure capable of withstanding these positive pressures in case of positive pressure (buoyancy) It should be processed.

For this purpose, conventionally, after the perforation hole is buried in the rock bed at a sufficient depth to reach the rock layer, the buoyant anchor is inserted and positioned so as to be located at a predetermined anchorage length in the rock layer of the perforated hole, and the perforation hole and the buoyant anchor Cement grout, etc., to fix the buoyancy anchor to the perforation hole, and to counteract the tensile force generated by buoyancy due to the resistance of the buoyancy anchor to the settlement field and the rock layer. At the upper end of the steel bar, a buoyancy anchor construction construction was used to install the foundation structure in the state of a fixed fixing plate obtained by fastening a support plate with the upper and lower nuts.

In the conventional buoyancy anchor construction method, a hole is formed in the structure so that the upper end of the buoyancy anchor is exposed after the curing of the foundation concrete forming the structure, and then the upper portion of the buoyancy anchor is pulled.

Therefore, the conventional buoyancy anchor construction method has a problem that the buoyant anchor construction period is increased because the buoyant anchor is subjected to a tensile process after the curing period of the grouting and the curing period of the foundation concrete in the perforation hole in the construction site.

Korean Patent No. 10-1596245

Therefore, the problem to be solved by the present invention is that the buoyant anchor can be tensioned before or after the putting of the foreclosed concrete and the foundation concrete, regardless of whether the foreside concrete and the foundation concrete are laid on the ground, A buoyant pressure-tight sleeve for preventing leakage of groundwater by preventing the groundwater from flowing into the gap between the concrete surface and the inner surface of the sleeve, and securing safety against punching shearing by the perforation hole when tensioning the buoyancy anchor, To provide an anchor construction method.

According to an embodiment of the present invention, the anti-buoyancy pressure sleeve includes a lower plate having a predetermined shape; An upper plate disposed at a predetermined distance from an upper portion of the lower plate and smaller than a size of the lower plate; A hollow columnar sleeve passing through the center of the lower plate and the upper plate and disposed between the lower plate and the upper plate; And a concrete index bonding plate attached around the inner surface of the sleeve.

The buoyancy pressure absorbing sleeve according to another embodiment of the present invention may further include a plurality of annular protrusions arranged on the outer surface of the sleeve along the longitudinal direction of the sleeve.

The buoyancy prevention pressure sleeve according to another embodiment of the present invention further includes a plurality of expansion type concrete adhesion reinforcing members disposed on both sides of the sleeve, and each of the expansion type concrete adhesion reinforcing members is provided in a plate form A first concrete attachment reinforcement plate rotatably connected to an edge of a lower surface of the upper plate; A second concrete attachment reinforcement plate provided in a plate form and having one side of the plate rotatably connected to an edge of an upper surface of the lower plate; A first concrete attachment reinforcing plate and a second concrete attachment reinforcing plate which are coupled to the other side of the first concrete attachment reinforcing plate and the other side of the second concrete attachment reinforcing plate so that the first concrete attachment reinforcing plate and the second concrete attachment reinforcing plate are rotatably connected to each other, ; And a sleeve having a ring-shaped portion formed on an outer surface of the sleeve in a circumferential direction, and when the first concrete attachment reinforcing plate and the second concrete attachment reinforcing plate are rotated in the sleeve direction, And a rotating shaft coupling ring for holding the reinforcing plate and the second concrete attachment reinforcing plate in a folded state in the sleeve direction.

According to an embodiment of the present invention, there is provided a method of constructing a buoyancy anchor, comprising the steps of: using the buoyancy preventing pressure sleeve; Inserting a buoyancy anchor into the perforation hole; Grouting the perforation hole to fix the lower portion of the buoyancy anchor to the ground; Installing an acupressure sleeve at an inlet of the perforation hole so that an upper portion of the buoyancy anchor is inserted into the sleeve of the acupressure sleeve; Tensioning the buoyancy anchor; And a step of securing the upper portion of the buoyancy anchor to the protective cap by providing a protective cap to seal the inside of the sleeve of the pressure-sensitive sleeve after performing grouting in the sleeve of the pressure-sensitive sleeve.

Placing the abandoned concrete so that the lower plate of the acupressure sleeve is buried in the floor where the acupressure sleeve is installed; Disposing reinforcing bars on top of the abandoned concrete; And placing a foundation concrete on top of the abandoned concrete so that the reinforcing bar and the shiabuck sleeve are buried, the method comprising: tensioning the buoyancy anchor; And a step of providing a protective cap to seal the inside of the sleeve of the pressure-sensitive sleeve after grouting the inside of the sleeve of the pressure-sensitive sleeve so that the upper portion of the buoyancy anchor is fixed to the protective cap, Or later.

The buoyancy-proof pressure sleeve according to the present invention has the following advantages.

First, the sleeve accommodates the upper portion of the buoyant anchor exposed to the outside of the perforated hole, and the upper portion of the buoyant anchor extending from the perforated hole can be independently positioned inside the sleeve, so that regardless of whether the abandoned concrete and the foundation concrete are placed on the ground There is an advantage that the buoyant anchor can be tensioned before or after the putting of the foreside concrete and the foundation concrete. Therefore, according to the construction period of the building construction, the buoyant anchor can be preceded by the tensile process before the casting step of the abandoned concrete and the foundation concrete reaches, and the casting step of the abandoned concrete and foundation concrete is reached, The upper part of the buoyant anchor in the sleeve is not embedded in the concrete, so that the tensile process of the buoyant anchor can be carried out after the putting of the discarded concrete and the foundation concrete, The buoyant anchor construction process can be carried out.

Second, since the concrete index joint plate is provided on the inner surface of the sleeve, there is an advantage that leakage of groundwater can be prevented by blocking the inflow of groundwater into the gap between the concrete surface inside the sleeve and the inner surface of the sleeve after completion of the buoyancy anchor application.

Thirdly, since the lower plate is provided larger than the upper plate, stress acting in the longitudinal direction of the sleeve when the buoyancy anchor housed in the sleeve is tensioned can be dispersed by the lower plate, It is possible to secure safety against the punching shear caused by the punching shear.

1 is a perspective view showing the appearance of an anti-buoyancy pressure sleeve according to an embodiment of the present invention.
2 is a cross-sectional view of Fig.
FIG. 3 is a flowchart for explaining a buoyancy anchor construction method using a buoyancy preventing pressure sleeve according to an embodiment of the present invention.
FIG. 4A is a view showing a construction in step S110 of FIG. 3. FIG.
And FIG. 4B is a view showing a construction in steps S120 and S130 of FIG.
And FIG. 4C is a view showing a construction in step S140 of FIG.
4D is a view showing a state in which buoyancy anchor construction is completed.
5 is a perspective view illustrating the appearance of an anti-buoyancy pressure sleeve according to another embodiment of the present invention.
FIG. 6 is a view showing the appearance of a buoyancy preventing pressure sleeve according to another embodiment of the present invention.
FIG. 7 is a view showing a concrete reinforcing member shown in FIG. 6 unfolded.

Hereinafter, an anti-buoyancy sleeve according to an embodiment of the present invention and a buoyancy anchor construction method using the same will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

FIG. 1 is a perspective view showing the appearance of an anti-buoyancy pressure sleeve according to an embodiment of the present invention, and FIG. 2 is a sectional view of FIG.

1 and 2, the buoyancy-preventing pressure sleeve 100 according to an embodiment of the present invention includes a lower plate 110, an upper plate 120, a sleeve 130, and a concrete index joint plate 140 .

The lower plate 110 is disposed at a lower portion of the pressure-applying sleeve 100 and is provided in a predetermined shape. In one example, the lower plate 110 may be in the form of a square plate of metal.

The upper plate 120 is disposed at a certain distance from the upper portion of the lower plate 110. At this time, the upper plate 120 is smaller than the lower plate 110. In one example, the top plate 120 may be in the form of a square plate of metal.

The sleeve 130 is disposed between the lower plate 110 and the upper plate 120 through a central portion of the lower plate 110 and the upper plate 120 and is provided in a hollow columnar shape. The center of each of the lower plate 110 and the upper plate 120 is opened by the sleeve 130 as the sleeve 130 passes through the center of the lower plate 110 and the upper plate 120.

The concrete index joint plate 140 has a predetermined thickness and one surface is an adhesive surface. The concrete index joint plate 140 is attached to the inner surface of the sleeve 130 through the adhesive surface. At this time, the concrete index joint plate 140 protrudes from the inner surface of the sleeve 130 by the thickness.

The anti-buoyancy sleeve 100 according to one embodiment of the present invention is used for construction of a buoyancy anchor applied to the ground where buoyancy is generated at a construction site. Hereinafter, a buoyancy anchor construction method using the buoyancy pressure absorbing sleeve 100 according to an embodiment of the present invention will be described. FIG. 3 is a flow chart for explaining a buoyancy anchor construction method using a buoyancy pressure-tight sleeve according to an embodiment of the present invention, FIG. 4A is a view showing a construction in step S110 of FIG. 3, FIG. 4C is a view showing a construction in step S140 of FIG. 3, and FIG. 4D is a view showing a state in which buoyancy anchor construction is completed.

Referring to FIGS. 3 to 4D, the buoyancy anchor construction method using the buoyancy pressure absorbing sleeve 100 according to one embodiment of the present invention includes: (S110) puncturing the perforation hole 10 to the design depth; Inserting the buoyancy anchor 20 into the perforation hole 10 (S120); A step (S130) of grouting the inside of the perforation hole (10) to fix the lower portion of the buoyancy anchor (20) to the ground; A step (S140) of installing an acupressure sleeve (100) at an inlet of the perforation hole (10) so that the upper portion of the buoyancy anchor (20) is inserted into the sleeve (130) of the acupressure sleeve (100); And tensioning the buoyancy anchor (S150); (S160) grouting grooves in the sleeve (130) of the acupressure sleeve (100); A step S170 of placing the abandoned concrete 1 so that the lower plate 110 of the acupressure sleeve 100 is buried on the floor where the acupressure sleeve 100 is installed; A step S180 of placing reinforcing bars on the upper portion of the abandoned concrete 1; And a step S190 of placing the foundation concrete 2 on the abandoned concrete 1 so that the reinforcing bar and the pressure-sensitive sleeve 100 are buried.

The buoyancy anchor inserted into the perforation hole 10 in step S120 includes a tensile material in the form of a wire coupled with the anchor head and the anchor head. When the buoyancy anchor is inserted into the perforation hole 10, The bottom, or anchor head, is inserted into the perforation hole 10, and the top of the buoyancy anchor 20, i.e., the free end of the tensile material, extends toward the inlet of the perforation hole 10.

In step S130, the anchor head is fixed in the perforation hole 10 in the course of concrete curing by grouting after grouting is performed in the perforation hole 10.

In step S140, the acupressure sleeve 100 is positioned at the inlet of the perforation hole 10. At this time, the acupressure sleeve 100 is positioned such that the lower plate 110 is placed on the ground where the entrance portion of the perforation hole 10 is located, but the hollow of the sleeve 130 is communicated with the perforation hole 10. In this state, the upper portion of the buoyancy anchor 20, that is, the free end of the tensile material is inserted into the sleeve 130 of the pressure-sensitive sleeve 100, and then exposed to the outside of the sleeve 130.

In step S150, the buoyancy anchor 20 is pulled by pulling the upper portion of the buoyancy anchor 20, that is, the free end of the tensile material.

In step S160, grouting is performed inside the sleeve 130 of the acupressure sleeve 100 and a protective cap 30 is provided on the upper plate 120 of the acupressure sleeve 100 to form an upper portion of the buoyancy anchor 20 Secures the free end of the tensile material and seals the inside of the sleeve 130 through the protective cap 30. In this process, if the grouting concrete is cured in the sleeve 130, the concrete index joint plate 140 attached to the inner surface of the sleeve 130 is positioned between the inner surface of the concrete and the sleeve 130. The concrete index joint plate 140 located between the inner surface of the concrete and the sleeve 130 prevents leakage of groundwater into the gap between the concrete and the inner surface of the sleeve 130 to prevent water leakage.

The anti-buoyancy sleeve 100 according to one embodiment of the present invention has the following advantages in that the hollow sleeve 130 is provided.

The sleeve 130 receives the upper portion of the buoyancy anchor 20 exposed to the outside of the perforation hole 10 and the upper portion of the buoyancy anchor 20 extending from the perforation hole 10 is inserted into the interior of the sleeve 130 The buoyancy anchor 20 can be tensioned even before or after the abandonment of the abandoned concrete 1 and the foundation concrete 2 irrespective of whether the abandoned concrete 1 and the foundation concrete 2 are laid on the ground There is an advantage to be able to. Therefore, the tensioning process of the buoyancy anchor 20 can be preceded before the casting of the abandoned concrete 1 and the foundation concrete 2 according to the construction period of the construction work, and the abandoned concrete 1 and the foundation concrete The upper portion of the buoyancy anchor 20 in the sleeve 130 is not in contact with the upper surface of the buoyancy anchor 20 even when the abandoned concrete 1 and the foundation concrete 2 are laid, The buoyant anchor 20 can be stretched after the abandonment of the abandoned concrete 1 and the foundation concrete 2 so that the buoyancy anchor can be flexibly applied during the construction period of the construction work .

Since the concrete index joint plate 140 is provided on the inner surface of the sleeve 130, it is possible to prevent the groundwater from flowing into the gap between the concrete surface inside the sleeve 130 and the inner surface of the sleeve 130 after completion of the buoyancy anchor application There is an advantage that leakage can be prevented.

Since the lower plate 110 is larger than the upper plate 120, stress acting in the longitudinal direction of the sleeve 130 when tensioning the buoyancy anchor 20 accommodated in the sleeve 130 is transmitted to the lower plate 110 So that there is an advantage that safety against punching shear by the perforation hole 10 can be ensured when the buoyant anchor 20 is pulled.

Hereinafter, the anti-buoyancy sleeve according to another embodiment of the present invention will be described in detail with reference to FIG. 5, focusing on differences from the anti-buoyancy sleeve according to an embodiment of the present invention. 5 is a perspective view illustrating the appearance of an anti-buoyancy pressure sleeve according to another embodiment of the present invention.

Referring to FIG. 5, the buoyancy pressure absorbing sleeve 100 'according to another embodiment of the present invention includes a plurality of annular protrusions 150 arranged on the outer surface of the sleeve 130 along the longitudinal direction of the sleeve 130 The present invention is similar to the buoyancy preventing pressure sleeve 100 according to the embodiment of the present invention except for including a plurality of annular protrusions 150 in the following description.

The plurality of annular protrusions 150 are formed in a shape corresponding to the cross-sectional shape of the sleeve 130. For example, when the sleeve 130 is cylindrical, a plurality of annular protrusions 150 are formed along the outer circumference of the sleeve 130 in the form of an annular ring, and are arranged in the longitudinal direction of the sleeve 130.

The buoyancy-preventing pressure-tight sleeve 100 'according to another embodiment of the present invention is constructed such that during the process of constructing the buoyancy anchor, the excrement concrete 1 and the foundation concrete 2 are installed, The adhesion of the shrink sleeve 100 with the abandoned concrete 1 and the foundation concrete 2 can be improved by the plurality of annular protrusions 150 when embedded in the foundation concrete 1 and the foundation concrete 2.

Therefore, when the buccal sleeve 100 'is embedded in the abandoned concrete 1 and the foundation concrete 2 during the buoyancy anchor construction process, the buccal sleeve 100' There is an advantage that the adhesive force of the acupressure sleeve 100 'is improved, and thus the acupressure sleeve 100' can be positively positioned right in the same direction as the perforation hole 10.

Hereinafter, the buoyancy-preventing pressure-sensitive sleeve according to another embodiment of the present invention will be described in detail with reference to FIGS. 6 and 7, focusing on differences from the buoyancy-preventing pressure-relief sleeve according to an embodiment of the present invention. FIG. 6 is a view showing an external appearance of a buoyancy preventing pressure sleeve according to another embodiment of the present invention, and FIG. 7 is a view showing a concrete reinforcing member shown in FIG. 6 unfolded.

6 and 7, the buoyancy-preventing pressure-tight sleeve 100 '' according to another embodiment of the present invention includes a plurality of deployable concrete attachment reinforcing members 160, Since the same as the buoyancy force absorbing sleeve 100 according to the embodiment, a plurality of elongated concrete attaching reinforcing members 160 will be mainly described.

The plurality of unfolded concrete attachment reinforcing members 160 are arranged in the circumferential direction of the sleeve 130 of the pressure-sensitive sleeve 100 ''. The plurality of unfolded concrete attachment reinforcing members 160 includes a first concrete adhesion reinforcing plate 161, a second concrete adhesion reinforcing plate 162, a developing rotary shaft 163, and a rotary shaft coupling ring 164.

The first concrete adhesion reinforcing plate 161 is provided in the form of a plate and one side of the plate is rotatably connected to the edge of the lower surface of the upper plate 120 of the pressure-sensitive sleeve 100 ''.

The second concrete attachment reinforcing plate 162 is provided in the form of a plate and one side of the plate is rotatably connected to the edge of the upper surface of the lower plate 110 of the pressure applying sleeve 100 ''.

The expansion rotary shaft 163 is coupled to the other side of the first concrete adhesion reinforcing plate 161 and the other side of the second concrete adhesion reinforcing plate 162 to form the first concrete adhesion reinforcing plate 161 and the second concrete adhesion reinforcing plate 162. [ (162) are rotatably connected to each other.

The first concrete attachment reinforcing plate 161 and the second concrete attachment reinforcing plate 162 are provided on the outer surface of the sleeve 130 in a ring shape with a part of the circumferential direction opened in a ring shape, The first concrete attaching reinforcing plate 161 and the second concrete attaching reinforcing plate 162 are folded in the direction of the sleeve 130 when the rotation shaft 163 is rotated, .

The buoyancy-preventing pressure-tight sleeve 100 '' according to another embodiment of the present invention is normally deployed before being installed on the ground where the perforation hole 10 is formed, The first concrete adhesion reinforcing plate 161 is separated from the lower surface of the upper plate 120 of the pressure-sensitive sleeve 100 '' by a predetermined distance, And the second concrete adhesion reinforcing plate 162 contacts the outer surface of the sleeve 130 of the pressure-sensitive sleeve 100 '' and is attached to the first concrete adhesion reinforcing plate 161 in parallel with the sleeve 130, And the second concrete attachment reinforcing plate 162 are held in a folded state toward the sleeve 130.

The concrete adhesion reinforcing member 160, which is normally kept folded as described above, is deployed when the acupressure sleeve 100 '' is installed on the ground in the buoyancy anchor construction process. That is, the concrete attaching reinforcing member 160 is detachably attached to the first concrete attaching reinforcing plate 161 and the second concrete attaching plate 161 while the expansion rotary shaft 163 coupled to the rotary shaft attaching hook 164 is separated from the rotary shaft attaching hook 164, The reinforcing plate 162 is spread around the developing rotary shaft 163. The first reinforced concrete plate 161 and the second reinforced concrete plate 162 are arranged at an angle with respect to the longitudinal direction of the sleeve 130 of the pressure-sensitive sleeve 100 ''. In this state, when the abandoned concrete 1 and the foundation concrete 2 are installed during the buoyancy anchor construction process so that the acupressure sleeve 100 '' is embedded, the acupressure sleeve 100 '' is abandoned by the concrete attachment reinforcement member 160 The adhesion between the concrete 1 and the foundation concrete 2 is improved.

Therefore, in the buoyancy preventing pressure-tight sleeve 100 '' according to yet another embodiment of the present invention, since the concrete attaching reinforcing member 160 is held in a folded state during normal operation, (1) and the foundation concrete (2) during the buoyancy anchor construction process, and the shiitake sleeve (100 '') There is an advantage that the adhesion force of the concrete attaching reinforcing member 160 can be expanded only at the time of pouring of the concrete 1 and the foundation concrete 2,

Meanwhile, the lower plate 110 of the buoyancy pressure-relief sleeve according to an embodiment of the present invention may be provided with a corrosion prevention layer (not shown) to prevent corrosion of the metal surface. The surface coating material of the anticorrosion layer according to the present invention is composed of 20% by weight of tolytriazole, 15% by weight of benzimidazole, 10% by weight of trioctylamine, 15% by weight of hafnium and 40% Mu m.

Toluetriazole, benzimizazole, and trioctylamine serve to prevent corrosion and prevent discoloration.

Hafnium is a corrosion-resistant transition metal element that plays a role in providing excellent waterproofness and corrosion resistance.

 Aluminum oxide is added for the purpose of refractoriness and chemical stability.

The reason why the ratio of the constituent components and the thickness of the coating are limited as described above is that the present inventor has analyzed through several test results, and as a result, showed the optimum corrosion inhibiting effect at the above ratios.

The surface of the first concrete adhesion reinforcing plate 161 and the surface of the second concrete adhesion reinforcing plate 162 of the buoyancy preventing pressure-sensitive sleeve according to another embodiment of the present invention is coated with a corrosion preventive coating layer to prevent surface corrosion In order to prevent the corrosion phenomenon, the surface coating material of the metallic material according to the present invention may be prepared by coating a surface coating material of a metallic material in an amount of 35 wt% of benzotriazole, 5 wt% of boron, 5 wt% of carboxy methyl cellulose, 5 wt% of zirconium, , And 45 weight% of aluminum oxide (Al2O3).

Benzotriazole is added for the purpose of preventing corrosion and preventing discoloration, and boron serves as a deoxidizer.

CMC (Carboxy Methyl Cellulose) is a white or whitish powder with high water absorption. It is easily dissolved in water to exhibit viscosity, forming a film, and acting as a dispersant.

Zirconium acts to enhance abrasion resistance and corrosion resistance, and titanium is a corrosion-resistant transition metal element with excellent water resistance and corrosion resistance.

Aluminum oxide is added for the purpose of refractoriness and chemical stability.

The reason why the proportions of the constituent components are limited as described above is that the present inventors have analyzed through several test results, and as a result, showed the optimum corrosion preventing effect at the above ratios.

Meanwhile, in order to effectively prevent and prevent the adhesion of contaminants to the outer surface of the inner surface of the sleeve 130 of the anti-buccal pressure-sensitive sleeve according to an embodiment of the present invention, Can be formed.

The anti-contamination coating composition contains alkanolamide and amphopropionate in a molar ratio of 1: 0.01 to 1: 2, and the total content of alkanolamide and amphopropionate is 1 to 10 Weight%.

The molar ratio of alkanolamide and amphopropionate is preferably in the range of 1: 0.01 to 1: 2. When the molar ratio is out of the range, the coating property of the base material is lowered or the moisture adsorption on the surface is increased, There is a problem to be removed.

The alkanolamide and amphopropionate are preferably used in an amount of 1 to 10% by weight in the aqueous solution of the total composition. When the amount is less than 1% by weight, the applicability of the base material is deteriorated. When the amount is more than 10% by weight, So that crystal precipitation is likely to occur.

On the other hand, as a method of applying the present anti-fouling coating composition onto a substrate, it is preferable to coat it by a spray method. The thickness of the final coated film on the substrate is preferably 500 to 2000 angstroms, more preferably 1000 to 2000 angstroms. When the thickness of the coating film is less than 500 ANGSTROM, there is a problem that it deteriorates in the case of a high-temperature heat treatment. When the thickness is more than 2000 ANGSTROM, crystallization of a coated surface tends to occur.

The anti-contamination coating composition may be prepared by adding 0.1 mol of alkanolamide and 0.05 mol of amphopropionate to 1000 mL of distilled water, followed by stirring.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features presented herein.

100, 100 ', 100'': acupressure sleeve 110: bottom plate
120: upper plate 130: sleeve
140: Concrete index joint plate 150: Annular protrusion
160: Concrete attaching reinforcing member 161: First concrete attaching reinforcing plate
162: second concrete adhesion reinforcing plate 163: expansion rotary shaft
164: rotating shaft coupling ring

Claims (4)

A lower plate (110) having a predetermined shape;
An upper plate 120 spaced a predetermined distance above the lower plate 110 and smaller than a size of the lower plate 110;
A hollow columnar sleeve 130 disposed between the lower plate 110 and the upper plate 120 through the center of the lower plate 110 and the upper plate 120; And
And a concrete index joint plate (140) attached around the inner surface of the sleeve (130);
The acupressure sleeve 100 further includes a plurality of deployable concrete attachment reinforcing members 160 disposed on both sides of the sleeve 130,
Each of the unfolded concrete attachment reinforcing members 160 is formed by a plurality of
A first concrete adhesion reinforcing plate 161 provided in a plate shape and having one side of the plate rotatably connected to an edge of a lower surface of the upper plate 120;
A second concrete adhesion reinforcing plate 162 provided in a plate shape and having one side of the plate rotatably connected to an edge of the upper surface of the lower plate 110;
The first concrete adhesion reinforcing plate 161 and the second concrete adhesion reinforcing plate 162 are joined to the other side of the first concrete adhesion reinforcing plate 161 and the other side of the second concrete adhesion reinforcing plate 162, A development rotary shaft 163 rotatably connected to each other; And
When the first concrete adhesion reinforcing plate 161 and the second concrete adhesion reinforcing plate 162 are rotated in the direction of the sleeve 130, a part of the circumferential direction is formed in a ring shape on the outer surface of the sleeve 130 The rotation shaft coupling ring 164 for coupling the first rotation shaft 163 and the second concrete attachment reinforcing plate 161 and the second concrete attachment reinforcing plate 162 in the direction of the sleeve 130, ≪ / RTI >
Buoyant pressure-proof sleeve that can be constructed after construction progress.
The method according to claim 1,
The acupressure sleeve 100 further includes a plurality of annular protrusions 150 arranged on the outer surface of the sleeve 130 along the longitudinal direction of the sleeve 130.
Buoyant pressure-proof sleeve that can be constructed after construction progress. delete A buoyancy-preventing pressure-tight sleeve according to claim 1,
Drilling a perforation hole 10 to a design depth S110;
Inserting the buoyancy anchor 20 into the perforation hole 10 (S120);
A step (S130) of grouting the inside of the perforation hole (10) to fix the lower portion of the buoyancy anchor (20) to the ground;
A step (S140) of installing an acupressure sleeve (100) at an inlet of the perforation hole (10) so that the upper portion of the buoyancy anchor (20) is inserted into the sleeve (130) of the acupressure sleeve (100);
Tensioning the buoyancy anchor 20 (S150);
A protective cap 30 is installed to seal the inside of the sleeve 130 of the acupressure sleeve 100 after the grouting of the sleeve 130 of the acupressure sleeve 100 is performed to protect the upper portion of the buoyancy anchor 20 (S160) to the cap (30). ≪ RTI ID = 0.0 >
A buoyancy anchor construction method using a buoyancy pressure - tight sleeve capable of post construction after construction progress.

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