KR101690727B1 - Seismic retrofitting structure without an anchor and with no demage of the existing structure - Google Patents

Abstract

The present invention can improve the seismic performance of an existing structure without using an anchor which requires a drilling operation, and can improve the seismic performance of an existing seismic retrofit frame (or a brace And the like), and an anti-breaking steel construction of a non-anchor which does not damage the existing structure which can further improve the integrity. The present invention relates to an anti-breaking steel structure for a non-anchor which does not damage an existing structure, and is inserted into a square frame 71 partitioned by a column, a beam or a slab of an existing structure 70 at a predetermined distance A reinforcing frame (10); An out-of-plane expansion preventing plate (20) inserted in a spaced-apart space between the reinforcing frame (10) and the frame (71) and installed on the reinforcing frame (10) and extending parallel to the front and rear surfaces of the reinforcing frame (10); The outer frame 20 is inserted into the spaced space between the reinforcing frame 10 and the frame 71 and installed in the reinforcing frame 10 in a direction orthogonal to the outer circumferential surface of the reinforcing frame 10. A cotton expansion prevention plate (30) to be joined; A filling tube 40 inserted into the spaced space between the reinforcement frame 10 and the square frame 71 surrounded by the out-of-plane expansion prevention plate 20 and the non-expansion prevention plate 30; And an expandable filler (50) which is pressurized and hardened by being inflated into the fill tube (40) to expand the fill tube (40) and secure the reinforcement frame (10) to the bevel frame (71) without anchor.

Description

TECHNICAL FIELD [0001] The present invention relates to an anchor steel reinforcement steel structure that does not damage an existing structure,

The present invention relates to an anti-breaking steel structure for an anchor that does not damage an existing structure, and more particularly, to an anti-breaking steel structure for an anchor that can improve seismic performance of an existing structure without using an anchor requiring drilling, To an anti-seismic steel structure for a non-anchor which does not damage an existing structural member which can further improve the integrity and integrity of a structural member (column, beam, slab) .

Methods for installing an earthquake-proof reinforcement member on an existing structure include an in-plane insertion method and an out-of-plane construction method.

The double-faced exterior finishing method is a method of attaching an anti-seismic reinforcement such as a reinforcement frame and a brace (brace) to the outer or outer surface of the existing structure. It is difficult to exhibit the seismic reinforcement effect, It is highly likely that the seismic reinforcement will fall out in the out-of-plane direction due to the seismic force. In order to completely bond (integrate) with the existing structure, a very large amount of anchor should be used, or a separate separation prevention device (for example, In addition, it has a disadvantage that it is limited to use in old buildings where the strength of the existing structure is very weak due to the damage of the existing structure.

In recent years, the use of an in-plane inserting method has been recommended in Korea due to the above problems (particularly, out-of-plane deviation). Examples of the method of inserting an anti- seismic reinforcement into a surface include a post-construction anchor reinforcement installation method and an epoxy injection bonding method .

The anchor reinforcement installation method is to install an anchor reinforcing bar on the existing structure and to fill the non-shrinking mortar with the reinforcement frame. It is disclosed in Korean Registered Patent No. 10-1487806 (Registered on January 23, 2015, An earthquake-proof reinforcement method using a damper).

In this method, a large amount of post-construction anchor was installed on the existing structure, so that a large amount of damage occurred and the installation location or depth was limited due to the reinforcing bar interference inside the existing structure.

The epoxy injection bonding method is a method of fixing / attaching an existing structure and a reinforcing frame with a chemical anchor or the like, and then injecting and filling the space therebetween with an epoxy. An example of this method is Korean Patent No. 10-1453407 Registered, method of seismic strengthening of columns using double C-shaped steel of keyhole-type high-strength bolted joints) Korean Registered Patent No. 10-1435624 (2014.08.22. Registered carbon fiber plate and mechanical anchor Shear, and seismic performance enhancement of reinforced concrete structures).

Since this method also uses a large amount of chemical anchors, damage to the existing structure can not be prevented. In addition, since the expensive epoxy is used in a large amount, it is not only economical but also the general epoxy injection agent has a large volume shrinkage during the curing process It is difficult to integrate, and the fire resistance and environmental properties are poor. In addition, since the thermal expansion coefficient (coefficient of linear expansion) or elastic modulus of the epoxy injecting agent is significantly different from that of the existing structure or the reinforcing frame, there is a problem in long-term behavior (a decrease in long-term adhesive strength due to a difference in thermal expansion coefficient, ).

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a non-anchoring structure capable of improving seismic performance of an existing structure without using an anchor, My progress is to provide steel structures.

It is another object of the present invention to provide a method of manufacturing a structural member that does not damage an existing structural member capable of further improving the degree of adhesion and integrity between a structural member (column, beam, slab) of an existing structural member and a seismic reinforcing frame (or brace, It is to provide steel reinforcement of non-anchors.

According to an aspect of the present invention, there is provided an anti-breaking steel structure for a non-anchor which does not damage an existing structure, and is characterized in that an inner side of a square frame divided by a column, A reinforcing frame inserted at a predetermined distance from the frame; An out-of-plane expansion preventing plate inserted in the spaced-apart space between the reinforcing frame and the frame and extending in parallel to the front and rear surfaces of the reinforcing frame; An inflatable restraint plate inserted in the spaced space between the reinforcing frame and the crush frame and provided on the reinforcing frame in a direction orthogonal to the outer circumferential surface of the reinforcing frame and joined to the out-side inflation prevention plate; A filling tube inserted into the spaced-apart space between the reinforcing frame and the square frame surrounded by the out-of-plane expansion prevention plate and the non-expansion bulge; And an inflating filler which is inflated and hardened by inflating the inflating tube to fix the inflating frame to the crushing frame without anchor.

In addition, a protruding frictional resistance mechanism may be installed on the inner surface of the rectangular frame to increase the frictional resistance between the charging tube and the inner surface of the frame.

At this time, the protruding frictional resistance mechanism may be formed in a waveform shape in which protrusion and depression are repeated in the direction of the inner peripheral surface of the square frame.

The protruding frictional resistance mechanism includes a desk adjusting mortar disposed on the inner surface of the square frame, and a protruding rigid member partially buried in the desk adjusting mortar.

Also, on the outer circumferential surface of the reinforcing frame, a shear key may be protruded to improve the sliding resistance performance with the filling tube.

The filling tube includes a main body into which the inflated filler is inflated and inflated, an inflation hose part connected to one end of the main body, one end connected to the infusion hose part and the other end connected to an inflating filler pressurization hose, And a connection valve having an opening / closing device for selecting the injection and blocking of the filler.

At this time, the main body may be composed of a cylindrical fiber sheet woven with fibers and a resin coating layer coated on the outer surface of the fiber sheet.

The expanded filler preferably has an expansion rate of + 0.1% or more, a fluidity of 230 mm or more of no-striking table flow, and a compressive strength of 40 MPa or more.

According to the non-anchor steel anti-skid steel structure which does not damage the existing structure according to the present invention, the inflating force of the inflating filler is controlled in the in-plane direction by the out-side inflation preventing plate and the cotton inflation stopping plate provided on the outer peripheral surface (That is, the direction between the reinforcing frame and the existing structure), thereby ensuring the integrity of the existing structure and the reinforcing frame more reliably.

According to the present invention, by reinforcing the outer circumferential surface of the joint portion of the reinforcing frame by the out-of-plane expansion preventing plate, the rigidity and proof stress of the frame joint are further improved, and furthermore, the protection of the filling tube and the inflating filler Can be reduced.

Further, according to the present invention, by integrating the reinforcing frame with the inflation filler by improving the frictional force of the out-of-plane inflation preventing plate, the inflation preventing plate and the shear key provided on the outer circumferential surface of the reinforcing frame, and improving the frictional resistance of the frictional resistance mechanism provided on the surface of the existing structure It is possible to further improve the endurance strength by integrating the expanded filler and the existing structure.

In particular, since the joint portion of the reinforcing frame provided in the face of the existing structure is securely fixed by the in-plane expansion force of the expanded filler filled in the filling tube, the working stress from the existing structure is immediately transmitted.

According to the present invention, the stress transmission performance from the existing structure to the reinforcing frame is greatly improved by the in-plane expansion stress of the expandable filler, and the reinforcing frame can immediately behave in case of an earthquake.

Further, according to the present invention, even when a structural body is deformed due to a horizontal external force acting on the building, integrity of the reinforcing frame and the existing structural body can be ensured and a visible effect can be obtained in which the stress transmission is securely ensured.

Further, according to the present invention, since the anchor is not used and the drilling operation is omitted, no noise, vibration, and dust are generated during construction, and therefore, it is possible to perform reinforcement work while using the building, and an expensive anchor is not used. And the complexity of the process is eliminated, thereby enabling a significant reduction in the airflow.

Particularly, according to the present invention, even if the concrete strength of the existing building is low, the anchor hole is not punctured to prevent damage to the structure, which is advantageous in that it can be effectively applied to earthquake-proof reinforcement work of an old building.

According to the present invention, by using a material having air permeability and water permeability as a filling tube, the air remaining in the tube is discharged to the surface of the tube by the injection pressure when filling the inflating filler, so that the inflated filler is sealed (Water other than the water required for the hydration reaction) is dehydrated to the surface of the tube so that it becomes a very closed room (ensuring a low water binding cost), so that the on-site seal curing It is possible to remarkably speed up the intensity expression and to exhibit high strength.

Further, after the residual air (bubbles) and surplus water in the filling material are discharged, the fine particles of the filling material fills the fine pores of the tube (gap between the fiber fabrics), so that the injection pressure can be kept constant.

According to the present invention, the inflation filler can be filled up to the right corners of the existing structure without the gap by the injection pressure. Further, since the right corners are processed in a curved surface shape or a diagonal shape by the desk adjusting mortar, There is an advantage that the existing structure and the reinforcing frame can be integrated over the entirety.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an elevation view showing an anti-
Fig. 2 is a longitudinal sectional view of the main part of the anti-seismic steel structure shown in Fig. 1,
3 is a cross-sectional view taken along the line A-A 'in Fig. 2,
4 is a longitudinal sectional view showing a modified example of the anti-seismic steel structure according to the present invention,
Fig. 5 is a view showing a configuration of a filling tube according to the present invention. Fig. 5 (a) is a view showing a configuration of a filling tube according to the present invention, and Fig. 5 (b) Sectional view taken along the line B-B '
6 and 7 are views for explaining the operation of the present invention.

Hereinafter, an anti-breaking steel structure for a non-anchor which does not damage an existing structure according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an elevation view showing an anti-seismic steel structure according to the present invention, FIG. 2 is a longitudinal sectional view of a main portion of the anti-seismic steel structure shown in FIG. 1, and FIG. 3 is a sectional view taken along line A-A ' .

As shown, the anti-seize steel construction according to the present invention includes a reinforcing frame 10, an out-of-plane expansion prevention plate 20, a cotton expansion prevention plate 30, a filling tube 40 and an expansion filler 50 .

The reinforcing frame 10 is a reinforcing member inserted in the in-plane direction of the existing structure 70 and is installed inside the square frame 71 partitioned by the column of the existing structure 70 and the reinforcing frame 10, It is formed to be somewhat smaller than the square frame so as to be spaced apart from the square frame 71 by a predetermined distance in order to provide a configuration for fixing the square frame 71 to the square frame 71.

The reinforcement frame 10 is additionally provided for the earthquake-proof reinforcement when the horizontal structural strength of the foundation structural body 70 is insufficient. The reinforcement frame 10 may be composed solely of the reinforcement frame or may be formed of a brace A brace) may be installed and used. As a specific example of the reinforcing frame, the following can be used.

That is, the reinforcing frame 10 may be formed of an H-shaped steel frame frame or a CFT (Concrete Filled Steel Tube) frame. In this case, the CFT frame is filled with high-strength concrete (or high-strength mortar) in the steel pipe instead of the steel frame, and the reinforcement effect of seismic strengthening can be further improved by further improving the strength, rigidity and ductility.

It is also effective to use the inflated filler of the present invention by filling the inside of the CFT frame.

The reinforcing frame 10 can be used by joining the H-shaped steel frame 11 and the CFT frame 13 as in the present embodiment. In this case, the H-shaped steel frame 11 is attached to the reinforcing frame 10, And the CFT frame 13 is disposed at a corner where the horizontal and vertical members of the reinforcing frame 10 meet and is coupled to the H-shaped steel frame frame. This is a structure for increasing the strength and stiffness of the joint portion of the reinforcing frame 10, in which the strength and stiffness of the reinforcing frame 10 are increased by using the CFT structure only at a portion of the joint where the horizontal member and the vertical member meet.

In the present invention, on the outer peripheral surface of the reinforcing frame 10, a shear key 15 may be protruded to improve the slip resistance (friction resistance) performance with the filling tube 40.

The shape of the shear key 15 is not particularly limited, such as a square, a circle, or a triangle. However, it is preferable that the shear key 15 has a circular shape, in particular, a shape with ribs, such as a deformed reinforcing bar, in terms of working efficiency and frictional resistance. Also, the installation interval of the shear keys 15 is not particularly limited, but is preferably 100 to 500 mm.

(The longitudinal direction of the horizontal and vertical members constituting the reinforcing frame) or the entirety of the outer peripheral surface of the reinforcing frame 10, An out-of-plane expansion preventing plate 20 or a cotton expansion preventing plate 30 is provided.

The out-of-plane expansion preventing plate 20 is an iron plate member extending in a direction parallel to the front and rear surfaces of the reinforcing frame 10 and provided at a predetermined height in a direction perpendicular to the outer surface of the reinforcing frame 10.

The out-of-plane expansion preventing plate 20 is formed by injecting an inflating filler 50 into the filling tube 40 inserted between the reinforcing frame 10 and the existing structure 70, and when the filling tube 40 is inflated, And further inflates only in the in-plane direction, thereby further enhancing the force of introduction of the prestress by the expansion force.

Further, the out-of-plane expansion preventing plate 20 enhances the rigidity and strength of the joint portion of the reinforcing frame 10 by reinforcing the outer peripheral surface of the reinforcing frame 10 with an iron plate, and further enhances the effect of reinforcing the seismic reinforcement.

The height of the out-side expansion prevention plate 20 is not particularly limited, but is preferably 30 to 80 mm. That is, if the spacing distance between the existing structural body 70 and the reinforcing frame 10 is approximately 40 to 100 mm, even if the out-of-plane expansion preventing plate 20 is provided, 70 are about 10 to 20 mm. This is to allow a part of the filling tube 40 to expand while exposing between the extra-lateral expansion prevention plate 20 and the existing structure 70 at the time of expansion of the filling tube 40.

The installation position of the out-of-plane expansion preventing plate 20 is a part of the outer peripheral surface of the reinforcing frame 10 on which the filling tube 40 is installed. However, considering the working efficiency and the reinforcing performance, .

The out-of-plane expansion preventing plate 20 can be joined to the reinforcing frame 10 in various ways, and in the present embodiment, it is joined to the reinforcing frame 10 by welding.

The plastic expansion preventing plate 30 is inserted into the spaced space between the reinforcing frame 10 and the frame 71 and is inserted into the reinforcing frame 10 in a direction perpendicular to the outer peripheral surface of the reinforcing frame 10 And is connected to the out-of-plane expansion prevention plate 20.

The plastic expansion preventing plate 30 serves to prevent the filling tube 40 from expanding in the face-to-face direction, thereby guiding the inflation force of the inflating filler 50 to be introduced only in the in-plane direction.

The height of the cotton expansion prevention plate 30 is the same as that of the out-of-plane expansion prevention plate 20, and the installation position connects the out-of-plane expansion prevention plates 20 provided in parallel at the end of the out- .

Next, the filling tube 40 is configured to pressurize and support the reinforcing frame 10 with respect to the existing structure 70 while being inflated with the inflated filling material 50 filled therein. It is most preferable to arrange it in the entire space separated from the inner circumferential surface of the existing structural body 70 and the outer circumferential surface of the reinforcing frame 10 without considering any limitations. However, considering economy and workability, It is preferable that the reinforcing frame 10 is inserted into a spaced space between the reinforcement frame 10 and the square frame 71 surrounded by the out-of-plane bulge-proof plate 20 and the non-bulky bulge- When the filling tube 40 is placed on the right corner of the existing structure 70, it is possible to improve the integrity of the existing structure 70 and the reinforcing frame 10 and to improve the strength of the most important right corner in terms of achieving stress transfer .

5 (a), the filling tube 40 includes a main body 41 which is inflated and inflated with the inflated filler 50, and a main body 41 which is connected to one end of the main body 41, (43), one end connected to the injection hose part (43) and the other end connected to an inflation filler pressure hose for infusing the inflated filler (50), and the infusion and injection blocking of the inflated filler And a connection valve 45 having an opening / closing device 45a.

At this time, the main body 41 should have air permeability, water permeability, flexibility, and should have sufficient strength to withstand the pressure of the inflating filler 50 to be injected. 5 (b), the main body 41 of the present embodiment includes a cylindrical fiber sheet 41a woven with a fiber and an outer surface of the fiber sheet 41a coated with a resin And a resin coating layer 41b. Specifically, it is preferably a material or structure of a fire hose.

Here, as the cylindrical fiber sheet 41a, a sheet woven with synthetic fibers such as polyester fiber, polyethylene fiber or nylon fiber, glass fiber, carbon fiber or aramid fiber is preferable, and the outer surface of the fiber sheet 41a As the resin to be coated, a synthetic resin such as a vinyl chloride resin, an acrylic resin, a urethane resin, or a natural rubber or a synthetic rubber is preferable.

In addition, the main body 41 may be formed by cutting a cylindrical hose made of a cylindrical fiber sheet 41a and a resin coating layer 41b to a length and then sewing the cut ends.

It is preferable that the main body 41 is sufficiently flexible so that it can be tightly and easily attached and attached between the inner circumferential surface of the existing structure 70 and the outer circumferential surface of the reinforcing frame 10 when the inflating filler 50 is injected therein. The flexibility of the main body 41 can be easily achieved by adjusting the thickness of the coating layer (coating amount of the resin coating agent: 80 to 120 g / m) and the material of the resin coating material.

The main body 41 also has a function of supporting the reinforcing frame 10 while filling the gap between the inner peripheral surface of the built-in structure 70 and the outer peripheral surface of the reinforcing frame 10, A specific strength is required. Specific examples thereof are preferably a water pressure strength of 0.3 MPa or more, an axial tensile strength of 2,000 N / cm or more, and a longitudinal tensile strength of 1,500 N / cm or more.

The injection hose part 43 is a part for connecting the connection valve 45 and the main body 41. The hose may be a hose for securing the internal pressure strength of the main body 41 without water permeability, It is preferable to use the same material as that of the main body 41 in consideration of the connection with the main body 41.

The connection valve 45 is a part for connecting the injection hose part 43 and the expansion filler pressure hose in the field. The opening and closing device 45a provided in the connection valve 45 is configured to be capable of selecting the injection and shutoff of the inflated filler 50. After the inflation of the inflated filler 50 is completed, Thereby preventing the liquid from flowing out in the reverse direction.

The inflated filler 50 is then pressed into the filling tube 40 and cured to secure the reinforcing frame 10 to the laying structure 70 without anchoring and further to prevent the chemical prestress due to the inflating force of the inflating filler 50 And transmits the normal load and seismic load acting on the existing structure 70 to the reinforcing frame 10 immediately.

Therefore, the expansion filler 50 preferably has an expansion rate of + 0.1% or more, a fluidity of 230 mm or more of no-striking table flow, and a compression strength of 40 MPa or more.

If the expansion rate is less than 1.0%, the amount of introduction of the chemical prestress due to the expansion force of the expanded filler 50 is lowered, and the reinforcement is reinforced by the existing structural body 70 It is difficult to instantaneously transmit the load to the frame 10. That is, when the expansion rate is lower than the above standard, the reinforcing frame 10 can be fixed to the existing structural body 70, but it is possible to reinforce the normal load (fixed load, working load, etc.) acting on the existing structural body 70 The force to transmit to the frame 10 is lowered, and it is difficult to further enhance the seismic strengthening effect.

In addition, the inflated filler 50 according to the present invention should exhibit a self-filling property (or self-leveling property) of 230 mm or more at the table flow value when no impact is applied, It is possible to charge up to every corner of the filling tube tightly.

If the table flow value is less than 230 mm, it is difficult to fill the expandable filler 50 to the corners of the filling tube 40, and furthermore, the injection pressure is greatly increased at the time of injection, and the efficiency of the construction is lowered.

In addition, the compressive strength is preferably 40 MPa or more when tested by KS F 2426 (Compressive Strength Test Method of Injected Mortar). Although the compressive strength of the expanded filler 50 injected into the filler tube 40 does not cause any problem if the compressive strength of the existing structural concrete exceeds the strength of the existing structural concrete, in the present invention, the joint between the existing structural body 70 and the reinforcing frame 10 And the stress concentration in the part of the expansion reinforcement material.

The expanded filler (50) according to the present invention is not particularly limited as long as it is a product satisfying the above-mentioned required performance. Specific examples of such an expansion reinforcement material include an expandable material premix-type cement mortar, a magnesia phosphate- Ceramic composite, super fast cement mortar mixed with expansion material, polymer cement mortar mixed with expansion material, and cement mortar mixed with? -Type semi-gypsum.

The injection of the expansion filler (50) is carried out by a normal pressure feeding pump, and the injection pressure is carried out until the pressure reaches 0.1 to 0.3 MPa.

The protruding frictional resistance mechanism 60 provided on the surface of the existing structural body 70 is provided on the surface of the existing structural body 70, that is, the inner surface of the internal frame 71 of the existing structural body 70, 40 and the existing structural body 70 is further improved.

The protruding frictional resistance mechanism 60 includes a desk adjusting mortar 61 and a protruding iron body 63. After the surface of the existing structural body 70 is subjected to a surface treatment such as removal of foreign matter, And the protruding rigid material 63 is inserted at a predetermined depth before the mortar layer is hardened.

The desk setting mortar 61 applied to the right corner (right angle joint) of the existing structure 70 is finished in a curved or diagonal shape as shown in FIG. 2, ) To the right corner. If the mortar 61 is not finished, there is a fear that the filling tube 40 is separated from the right corners without close contact.

4, in order to further increase the frictional resistance between the existing structure 70 and the filling tube 40, the desk setting mortar 61 is installed so as to have a corrugated shape in the direction of the inner peripheral surface of the existing structure 70 It is possible.

The desk setting mortar 61 according to the present invention serves as an adhesive layer for mounting the protruding metal piece 63 on the surface of the existing structure 70 and has a minimum thickness of 5 mm or more for fixing the protruding metal piece 63 Is preferable. There is no particular limitation to the mortar 61, but it is preferable to use a product that exhibits higher strength than the existing structure concrete. Examples of such products include various polymer cement mortar products used as resurfacing materials in Korea, polymer cement mortar products for desk adjustment, and remington removers for plaster.

The protruding hardware 63 according to the present invention is installed to increase frictional resistance between the existing structural body 70 and the filling tube 40. The shape of the metallic material is not particularly limited but may be a mesh shape Quadrangular or circular) iron pieces are preferably used.

The embedding depth of the protruding type hardware 63 is set so that about 30 to 70% of the thickness of the hardware is embedded in the demarcation mortar 61 so that a part of the protruding type hardware 63 is exposed. At this time, the depth of embedding can be adjusted so that the projecting iron piece 63 does not fall off from the desk adjusting mortar 61 and is exposed so as to exhibit sufficient frictional resistance.

Examples of such protruding hardware 63 include Expended Metal, welded wire mesh, and perforated wire mesh.

In addition, it is preferable that the exposed end surface of the steel piece is provided so as to coincide with the out-of-plane direction of the reinforcing frame (i.e., perpendicular to the reinforcing frame) to secure frictional resistance.

Next, a description will be given of a construction procedure of an anti-undergoing anchor steel construction that does not damage an existing structure according to the present invention.

1. Removal of existing finishing materials and background treatment

Dismantle various finishing materials (masonry wall, window, partition wall, finished mortar, etc.) in the in-plane direction of the existing structure. If the existing structural body 70 is severely deteriorated when the finishing material is removed, the maintenance work can be separately performed. When the finished mortar on the surface of the existing structure 70 exhibits strength higher than that of the matrix concrete, it can be used as it is without removing the finished mortar. In addition, the reinforcing frame 10 exposes the surface of the existing structure 70 to be joined and removes various foreign substances (background treatment).

2. Installation of protrusion type friction resistance mechanism

The foundation adjusting mortar 61 is finely applied to the exposed surface (reinforcing surface) of the existing structure 70 with the designed thickness. At this time, the corner portion of the existing structure 70 is finished in a curved shape so that the filling tube 40 is closely contacted without any gap.

The embossing of the mesh-shaped protruding iron material 63 is performed before the mortar 61 is cured (within 3 hours after application). At this time, the protruding type hardware 63 in the form of a mesh is buried in the desk adjusting mortar 61 so that it is partially buried (that is, a certain portion is protruded).

3. Strengthening frame installation and fixing step

In principle, the reinforcing frame 10 is manufactured in order to ensure quality and shorten the length of the frame. The reinforcing frame 10, which is manufactured in the factory, is lifted and transported to be installed at the reinforcing position, .

4. Filling tube installation and expansion filler injection step

The filling tube 40 may be attached to the reinforcing frame 10 in advance or inserted after the reinforcing frame 10 is installed. It is preferable that the filling tube 40 is fixed to the reinforcing frame 10 with an adhesive tape or the like so that its position is not changed after installation.

After connecting the connection valve 45 of the installed filling tube 40 and the pressure feeding hose, the inflated filling material 50 is pressure-fed and pressure infused, and surplus water is discharged to the surface of the filling tube 40 during the pressure infusion process Check. At this time, when the pressurization (injection) pressure of the pressure pump reaches 0.1 to 0.3 MPa, the valve is closed by the opening / closing device 45a of the connection valve 45, and then the injection is completed.

When the curing is completed, the main body 41 of the filling tube 40 is injected into the injection hose part 43. At this time, .

5. Steps to reinstall the finish

When the earthquake-proofing work according to the present invention is completed as described above, the finish material is reinstalled according to the design book. It is preferable that the finishing material is installed after the inflated filler 50 has secured a predetermined strength.

Next, the operation of the anti-breaking steel structure of the anchor without damaging the existing structure according to the present invention will be described with reference to FIGS. 6 and 7. FIG.

When the expandable filler 50 is pressurized and injected into the main body 41 of the filling tube 40 through the pressurization pump, the main body 41 is inflated in four directions while being filled with the expandable filler 50. 5 (b), air (bubbles) and surplus water (moisture other than water required for hydration reaction) of the expandable filler 50 are mixed with the cylindrical fiber sheet 41a and the resin coating layer 41b . Surplus water contained in the expanded filler 50 charged in the filling tube 40 is transferred to the surface of the main body 41 of the filling tube 40 to provide a very closed room (low water binding cost) The intensity expression speed is remarkably fast and high intensity is expressed.

Further, after the surplus water is discharged, the fine particles of the expandable filler (50) block the fine pores of the main body (41) (gap between the fiber fabrics) to prevent leakage on the paste.

When the filling tube 40 is inflated, it is desirable that the main body 41 concentrate inflation force in a direction pushing between the existing structure 70 and the reinforcing frame 10, that is, in the in-plane direction. And the cotton expansion prevention plate 30 interlock the expansion direction of the main body 41.

The protruding frictional resistance mechanism 60 and the shear key 15 are used to fit the protruding frictional resistance mechanism 60 and the shear key 15 so that the frictional resistance is increased. Therefore, the expansion filler 50 inserted in the filling tube 40 can move integrally with the existing structural body 70, and the strength of the anti-progressive force can be further increased.

Since the protruding frictional resistance mechanism 60 is finished in a curved shape at the corners of the installed structure 70, the main body 41 of the filled tube 40 is fitted to the protruded frictional resistance mechanism 60, As shown in Fig.

The filling tube 40 thus cured by injecting the inflated filler 50 is inflated by the out-side inflating prevention plate 20 and the infant < RTI ID = 0.0 > 70 and the reinforcing frame 10 are pressed to fix the reinforcing frame 10 to the existing structure 70 so that the integrity of the existing structure 70 and the reinforcing frame 10 can be more assured . Therefore, the stress transfer from the existing structural body 70 to the reinforcing frame 10 is greatly improved, so that the reinforcing frame 10 immediately behaves during the earthquake so that the earthquake-proof performance of the existing structural body 70 can be improved.

Since the reinforcement frame 10 is fixed by pressurizing the inflation filler 50 to the filling tube 40, the anchor for fixing the reinforcing frame 10 to the existing structure 70 is not used, No noise, vibration and dust are generated during construction, and it is possible to reinforce the building while using it. Moreover, since expensive anchors are not used, construction cost is greatly reduced, and complicated processes are omitted. Particularly, the present invention prevents damage to the structure due to not drilling anchor holes when the concrete strength of the existing structure 70 is low, so that the present invention can be effectively applied to seismic retrofitting works of old buildings. Furthermore, even when the building is deformed due to a horizontal external force acting on the building, a visible effect can be expected in which the integrity between the reinforcing frame 10 and the existing structural body 70 is ensured and the stress transmission is reliably ensured.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. It is obvious that you can do it.

10: reinforced frame 11: H-shaped steel frame frame
13: CFT frame 15:
20: out-of-plane expansion plate 30:
40: charging tube 41: body
41a: Fiber sheet 41b: Resin coating layer
43: injection hose part 45: connection valve
45a: opening and closing device 50: inflated filler
60: projection-type friction resistance mechanism 61: desk adjustment mortar
63: protruding type hardware 70: existing structure
71: square frame

Claims (8)

A reinforcing frame 10 inserted into the interior of the square frame 71 partitioned by columns, beams, or slabs of the existing structure 70 while being spaced apart from each other by a predetermined distance;
An out-of-plane expansion preventing plate (20) inserted in a spaced-apart space between the reinforcing frame (10) and the frame (71) and installed on the reinforcing frame (10) and extending parallel to the front and rear surfaces of the reinforcing frame (10);
The outer frame 20 is inserted into the spaced space between the reinforcing frame 10 and the frame 71 and installed in the reinforcing frame 10 in a direction orthogonal to the outer circumferential surface of the reinforcing frame 10. A cotton expansion prevention plate (30) to be joined;
A filling tube 40 inserted into the spaced space between the reinforcement frame 10 and the square frame 71 surrounded by the out-of-plane expansion prevention plate 20 and the non-expansion prevention plate 30; And
And an inflating filler (50) injected into the filling tube (40) to be inflated and cured to inflate the inflating tube (40) to fix the reinforcing frame (10) to the frame (71) without anchor,
The height of the out-of-plane bulge-proof plate 20 and the thickness of the bulky bulge-proof bulge 30 is set such that a part of the filling tube 40 at the time of expansion of the bulb tube 40, Outflow prevention plate 20 and the non-expansion prevention plate 30 so that air and surplus water in the expanded filler 50 are discharged to the outside while being expansed while being exposed between the tip of the out- (71) is spaced apart from the frame (71) by a predetermined distance. The method according to claim 1,
A protruding frictional resistance mechanism (60) is provided on the inner surface of the square frame (71) to increase frictional resistance between the filling tube (40) and the inner surface of the square frame (71) My progressive steel construction of anchor. 3. The method of claim 2,
Wherein the protruding frictional resistance mechanism (60) is configured in a waveform shape in which protrusions and depressions are repeated in the direction of the inner peripheral surface of the square frame (71). The method according to claim 2 or 3,
The protruding frictional resistance mechanism 60 includes a desk adjusting mortar 61 that is placed on the inner surface of the square frame 71 and a protruding rigid material 63 that is partially buried in the desk adjusting mortar 61 Wherein the reinforcing steel structure of the non-anchors does not damage the existing structure. The method according to claim 1,
The reinforcing steel framework of the non-anchor according to any one of claims 1 to 6, wherein the outer surface of the reinforcing frame (10) is formed with a shear key (15) protruded to improve slip resistance performance with the filling tube (40). The method according to claim 1,
The filling tube 40 includes a main body 41 into which the inflated filler 50 is injected and inflated, an infusion hose part 43 connected to one end of the main body 41, And a connection valve (45) having an opening / closing device (45a) connected to the expansion filler (43) and connected to the expansion filler pressure hose at the other end and capable of selecting injection and shutoff of the expansion filler (50) Non-anchor steel reinforcement steel construction that does not damage the structure. The method according to claim 6,
Characterized in that the main body (41) comprises a cylindrical fiber sheet (41a) woven with fibers and a resin coating layer (41b) coated on the outer surface of the fiber sheet (41a) My progressive steel construction of anchor. The method according to claim 1,
Wherein the expansion filler (50) has an expansion rate of + 0.1% or more, a flowability of 230 mm or more without striking table flow, and a compressive strength of 40 MPa or more without damaging the existing structure.

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