PC reinforcement block assembly for earthquake resistance reinforcement and its construction method

Abstract

The present invention relates to a PC reinforcement block assembly for earthquake-resistant reinforcement, which is easy to install and can reinforce the axial force of components without requiring a separate fire-resistant coating, by inserting an internal reinforcement bar into the hollow space of a PC reinforcement block unit that is laminated and installed on the outside of an existing component and filling it with a filler, and to a method for installing the same.

Description

[Technical field]

[0001] The present invention relates to a PC reinforcement block assembly for earthquake-resistant reinforcement, which is easy to install and can reinforce the strength of components against axial force without requiring a separate fire-resistant coating, by inserting an internal reinforcement bar into the hollow space of a PC reinforcement block unit that is layered on the outside of an existing structural component or inside a structure, and filling it with a filler. The assembly also relates to a method for installing the same. [Background technology]

[0002] Recently, the frequency and magnitude of earthquakes has increased in Korea, causing more damage to buildings and people. In particular, buildings built before 1988, when earthquake-resistant design was introduced for buildings with six stories or more, are still in use, and buildings with two stories or more or a total floor area of ​​200 m2 or more are still in use. 2 Many of the small-scale buildings mentioned above were built before 2017, when the scope of earthquake-resistant design was expanded, and are not subject to earthquake-resistant design, so there is a high demand for earthquake reinforcement of these buildings.

[0003] In the past, the most common methods of seismic reinforcement for reinforced concrete members were the section expansion method, in which reinforcing bars were placed around the existing member and concrete was poured to increase the cross section, and the steel plate attachment method, in which steel plates were attached around the existing member to encase it.

[0004] However, the cross-section expansion method requires temporary construction work such as setting up and dismantling formwork on-site, and requires pouring the expansion concrete and a curing period, which not only makes it less easy to work with but also lengthens the construction period.

[0005] Furthermore, the steel plate attachment method requires on-site welding, and there is a risk of fire due to hot work, so an additional process of fireproofing the steel plate is required.

[0006] To address these issues, a technology has been proposed in which reinforcement panels made by bending high-strength steel plates and filling them with fillers such as epoxy mortar or polymer mortar are fastened to existing components with anchor bolts (Korean Patent Registration No. 10-1672924).

[0007] However, the registered technology requires bending high-strength steel plates, which inevitably increases manufacturing costs, and since the steel plates are exposed to the outside, a separate fireproof paint coating is required on the outside of the steel plates. In addition, continuous maintenance work is required to prevent corrosion, and separate exterior finishing work is required, which is troublesome.

[0008] In addition, a reinforcing band must be fastened to integrate the divided reinforcing panels, but in this case, the protruding reinforcing band makes it difficult to use and mars the appearance. In order to omit such a reinforcing band, the reinforcing panels must be fixed to each other by on-site welding, which makes it difficult to ensure uniform quality, is greatly affected by on-site conditions such as weather, and there is a risk of fire due to hot work.

[0009] In addition, Korean Patent No. 10-2306103 was developed to address the problems of the conventional steel plate reinforcement method.

[0010] The registered technology installs multiple PC reinforcement panel units on existing concrete members that lack strength and connects each PC reinforcement panel unit with connectors to reinforce the existing members, making the production of the reinforcement member easy and economical, and providing excellent on-site workability and fire resistance. In addition, since multiple PC reinforcement panel units are installed in succession, the size and weight of the PC member are small, making it easy to handle and install, and the reinforcement member is unitized, making it easy to apply to members of various sizes.

[0011] However, in the registered technology, PC reinforcing panel units are joined by connectors that fit into key grooves. Therefore, the reinforcing members mainly resist the lateral forces, i.e., shear forces, of the member, and there is a limit to the increase in the resistance of the member to axial stress. Summary of the Invention [Problem to be solved by the invention]

[0012] In order to solve the above problems, the present invention provides a PC reinforcement block assembly for seismic reinforcement, which is easy to install, does not require a separate fireproof coating, and can reinforce the strength of components against axial force, and a method for installing the same. [Means for solving the problem]

[0013] In a preferred embodiment, the present invention provides a PC reinforcement block assembly for earthquake reinforcement, which is intended to reinforce existing reinforced concrete components, and comprises a rectangular unit body, an upward extension portion formed to protrude on one side above the unit body, and a downward extension portion formed to protrude on the other side below the unit body, and which is characterized in that it comprises a plurality of PC reinforcement block units which have a hollow penetrating longitudinally therethrough and are stacked so as to fit together vertically and horizontally, an internal reinforcement bar which penetrates the hollows of the plurality of PC reinforcement block units stacked vertically, and a filling material which is filled into the hollows of the plurality of PC reinforcement block units.

[0014] In another preferred embodiment, the present invention provides a PC reinforcement block assembly for earthquake-resistant reinforcement, characterized in that a first accommodating groove portion is formed in the longitudinal direction of the PC reinforcement block unit on at least one or more of the outer surfaces of the PC reinforcement block unit, and a first external reinforcement bar is accommodated inside the first accommodating groove portion so as to cross the longitudinal direction of the PC reinforcement block unit in the stacked multiple PC reinforcement block units, and the inside of the first accommodating groove portion is filled with filler material.

[0015] In another preferred embodiment, the present invention provides a PC reinforcement block assembly for earthquake-resistant reinforcement, characterized in that a second accommodating groove portion is formed in the width direction of the PC reinforcement block unit on at least one of the front and rear surfaces of the PC reinforcement block unit, and horizontally adjacent PC reinforcement block units have a second external reinforcement bar accommodated inside the second accommodating groove portion so as to cross the horizontal direction of the PC reinforcement block unit, and the inside of the second accommodating groove portion is filled with filler.

[0016] According to another preferred embodiment, the present invention provides a PC reinforcing block assembly for earthquake-proof reinforcement, characterized in that the hollow is formed penetrating vertically through the unit body, the upper extension portion, and the lower extension portion, respectively.

[0017] In another preferred embodiment, the present invention provides a method for constructing the PC reinforcement block assembly, comprising the steps of: (a) stacking a plurality of PC reinforcement block units on the outside of an existing member; (b) inserting and installing an internal reinforcement bar into the hollow of the plurality of PC reinforcement block units stacked vertically; and (c) filling the hollow with a filler material. Effect of the Invention

[0018] According to the present invention, the following effects are obtained.

[0019] First, PC reinforcement block units prefabricated in a factory can be stacked vertically on the outside of existing members so that the hollows are connected to form a PC reinforcement block assembly. This ensures excellent fire resistance by using non-combustible precast concrete blocks, eliminating the need for a separate fireproof coating.

[0020] Secondly, construction is simple because the internal reinforcement bar and the PC reinforcement block unit are integrated by filling the hollow space into which the internal reinforcement bar is inserted with a filling material. In addition, since multiple PC reinforcement block units are continuously lined up in the longitudinal direction and resist not only compressive force but also shear force and bending moment, it is possible to demonstrate excellent earthquake resistance by increasing the resistance to lateral force as well as axial force of the member. [Brief description of the drawings]

[0021] [Figure 1] FIG. 2 is a perspective view showing an embodiment of a PC reinforcing block unit. [Diagram 2] 1 is a perspective view showing a PC reinforcement block assembly installed on the outside of an existing pillar member. FIG. [Diagram 3] 1 is a cross-sectional view showing a PC reinforcing block unit connected to one side of an existing pillar member. [Figure 4] 1 is a cross-sectional view showing a PC reinforcing block unit connected to one side of an existing pillar member. [Diagram 5] This is a cross-sectional view showing the connection state of PC reinforcing block units having various cross sections and hollows. [Figure 6] This is a cross-sectional view showing the connection state of PC reinforcing block units having various cross sections and hollows. [Figure 7] This is a cross-sectional view showing the connection state of PC reinforcing block units having various cross sections and hollows. [Figure 8] This is a cross-sectional view showing the connection state of PC reinforcing block units having various cross sections and hollows. [Figure 9] 1 is a perspective view showing a PC reinforcement block assembly positioned at a distance from an existing pillar member. FIG. [Figure 10] A cross-sectional view showing an L-shaped PC reinforcement block unit connected to an existing beam member. [Figure 11] 11 is a cross-sectional view showing a state in which a first external reinforcement bar is installed in a first accommodating groove portion. FIG. [Figure 12] FIG. 11 is a perspective view showing another embodiment of the PC reinforcing block unit. [Figure 13] FIG. 2 is a perspective view showing an embodiment in which the PC reinforcing block assembly is a load-bearing wall. [Figure 14] FIG. 2 is a perspective view showing a Z-shaped PC reinforcement block unit. [Figure 15] 15 is a perspective view showing a PC reinforcement block assembly utilizing the PC reinforcement block unit shown in FIG. 14. [Figure 16] 16 is a cross-sectional view showing the state in which an internal reinforcing bar is installed in the PC reinforcing block assembly shown in FIG. 15. [Figure 17] This is an oblique view showing a PC reinforcement block unit that is convex on the top and concave on the bottom. [Figure 18] 18 is a perspective view showing a PC reinforcement block assembly using the PC reinforcement block unit of FIG. 17. [Figure 19] 13 is a perspective view showing another embodiment of a PC reinforcement block unit that is convex on the top and concave on the bottom. FIG. [Figure 20] 20 is a perspective view showing a PC reinforcement block assembly utilizing the PC reinforcement block unit of FIG. 19. [Figure 21] FIG. 11 is a perspective view showing another embodiment of a PC reinforcement block unit for reinforcing a shear wall. [Figure 22] 22 is a perspective view showing a PC reinforcement block assembly utilizing the PC reinforcement block unit of FIG. 21. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] In order to achieve the above-mentioned objective, the PC reinforcement block assembly for earthquake-resistant reinforcement of the present invention is intended to reinforce existing members made of reinforced concrete, and is characterized in that it comprises a rectangular unit body, an upward extension portion formed to protrude on one side above the unit body, and a downward extension portion formed to protrude on the other side below the unit body, and is composed of a plurality of PC reinforcement block units which have a hollow penetrating longitudinally therethrough and are stacked so as to fit together vertically and horizontally, an internal reinforcement bar which penetrates the hollows of the plurality of PC reinforcement block units stacked vertically, and a filling material which is filled into the hollows of the plurality of PC reinforcement block units.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0024] Fig. 1 is a perspective view showing an embodiment of a PC reinforcement block unit, Fig. 2 is a perspective view showing a PC reinforcement block assembly installed outside an existing pillar member, Figs. 3 and 4 are cross-sectional views showing a PC reinforcement block unit coupled to one side of an existing pillar member, Figs. 5 to 8 are cross-sectional views showing the coupled state of PC reinforcement block units having various cross sections and hollows, and Fig. 9 is a perspective view showing a PC reinforcement block assembly disposed apart from an existing pillar member.

[0025] As shown in Figures 1 to 9, the PC reinforcement block assembly for earthquake reinforcement of the present invention is intended to reinforce existing reinforced concrete members 1a, 1b, 1c, and is characterized in that it comprises a plurality of PC reinforcement block units 2 stacked vertically with a hollow 20 formed therein that penetrates longitudinally, an internal reinforcement bar 3 that penetrates the hollows 20 of the plurality of PC reinforcement block units 2 stacked vertically, and a filling material 4 that is filled into the hollows 20 of the plurality of PC reinforcement block units 2.

[0026] The present invention is intended to provide a PC reinforcement block assembly for earthquake reinforcement that is easy to install, does not require a separate fire-resistant coating, and is capable of reinforcing the axial force of components, and a method for installing the same.

[0027] The PC reinforcing block assembly for earthquake-resistance reinforcement of the present invention is attached to one side of an existing reinforced concrete member that requires earthquake-resistance reinforcement, or it is wrapped around the entire outer surface of the member to reinforce it.

[0028] The PC reinforcement block assembly for earthquake-resistant reinforcement comprises a PC reinforcement block unit 2, an internal reinforcement bar 3 and a filler material 4.

[0029] The PC reinforcement block unit 2 may be a precast concrete block prefabricated in a factory with reinforcing bars or reinforcing bar mesh arranged inside, or may be made of high-strength precast concrete or UHPC having excellent strength and ductility.

[0030] Precast concrete blocks are non-combustible materials, have excellent fire resistance, are not susceptible to corrosion and do not require separate fireproofing or anti-corrosion treatment. In addition, they are factory-produced and have excellent finishing quality, making them suitable for use as a final finish.

[0031] The PC reinforcing block unit 2 has a hollow 20 formed therein that penetrates the member in the longitudinal direction, and a plurality of units are stacked one on top of the other.

[0032] The PC reinforcement block units 2 that make up the PC reinforcement block assembly are provided in multiple pieces in the longitudinal and / or width directions of the existing components 1a, 1b, 1c, and are installed in close contact with or spaced apart from the existing components 1a, 1b, 1c.

[0033] The hollow 20 reduces the weight of the PC reinforcing block unit 2, thereby reducing the lifting burden.

[0034] The hollow 20 may be formed in various cross-sectional shapes such as a circle, an ellipse, a polygon, etc. Also, one or more hollows 20 may be formed depending on the size and shape of the PC reinforcing block unit 2.

[0035] Figures 3 and 4 show a PC reinforcement block unit 2 connected to one side of an existing column 1a, and Figures 3 and 4 show embodiments in which one elliptical hollow 20 and two circular hollows 20 are provided, respectively.

[0036] A plurality of the PC reinforcing block units 2 are stacked one on top of the other so that the hollows 20 formed inside communicate with each other.

[0037] The internal reinforcing bar 3 is provided so as to penetrate the hollow 20 of a plurality of PC reinforcing block units 2 stacked one above the other.

[0038] That is, the internal reinforcing bar 3 is inserted into the inside of the mutually communicating hollows 20 of the vertically stacked PC reinforcing block units 2 .

[0039] The internal reinforcing bar 3 is provided across the entire height of the PC reinforcing block assembly formed by stacking a plurality of PC reinforcing block units 2 .

[0040] The internal reinforcing bar 3 is a rod-shaped member capable of transmitting axial force (compression or tension) acting on the assembly, and may be a reinforcing bar, a steel bar, or the like.

[0041] The filling material 4 is filled into the hollows 20 of the multiple PC reinforcing block units 2.

[0042] The filler 4 is filled into the hollow 20 into which the internal reinforcing bar 3 is inserted, integrating the internal reinforcing bar 3 with the PC reinforcing block unit 2. The filler 4 also connects the separated PC reinforcing block units 2 together in the longitudinal direction, enabling them to resist not only compressive forces but also shear forces and bending moments.

[0043] This increases the member's resistance to axial stress and lateral force, enabling it to exhibit excellent earthquake resistance performance.

[0044] The filler 4 may be non-shrink mortar or the like.

[0045] If the existing component is a column 1a, the PC reinforcement block assembly may be installed on each face of the existing column 1a (Figure 2), or may be installed only on the front face of the existing column 1a (Figures 3 to 8).

[0046] When the PC reinforcement block assembly is installed only on the front surface of the existing column 1a, in order to ensure sufficient cross-sectional area, the rear side can be formed to be the same as the front width of the existing column 1a, and the front side can be formed so that the cross-section is expanded.

[0047] Figures 5 and 6 show an embodiment in which the cross section of the front side of the PC reinforcement block assembly is gradually enlarged, while Figures 7 and 8 show an embodiment in which the cross section of the front side of the PC reinforcement block assembly is enlarged in a T-shape.

[0048] If the existing member is a beam 1b, a PC reinforcing block unit 2 can be installed on each of the three surfaces of the existing beam 1b, namely, both side surfaces and the bottom surface (FIG. 10).

[0049] Also, if the existing member is a wall, the PC reinforcement block assembly can be installed on the front surface of the existing wall.

[0050] When the cross sections of the existing members 1a, 1b, and 1c are to be expanded and reinforced, the PC reinforcement block assembly can be installed so as to be spaced apart from the existing members 1a, 1b, and 1c. Then, concrete C or non-shrink mortar can be poured into the space between the PC reinforcement block assembly and the existing members 1a, 1b, and 1c (FIG. 9). At this time, the PC reinforcement block assembly serves both as a formwork and as member reinforcement.

[0051] FIG. 10 is a cross-sectional view showing an L-shaped PC reinforcing block unit connected to an existing beam member.

[0052] As shown in Figures 1, 3, 10, etc., the PC reinforcement block unit 2 has anchor holes 21 formed therethrough in the horizontal direction, and can be fixed to one side of existing members 1a, 1b, 1c by anchor members 5 penetrating the anchor holes 21.

[0053] The PC reinforcing block unit 2 can be fixed to the existing members 1a, 1b, 1c by at least one post-installed anchor.

[0054] For this purpose, at least one anchor hole 21 may be formed in the PC reinforcing block unit 2. And, anchor fixing holes (not shown) may be drilled on-site at positions corresponding to the anchor holes 21 in the existing members 1a, 1b, and 1c.

[0055] An anchor receiving groove 22 may be formed on the outer side of the anchor hole 21 to receive an end protrusion of the anchor member 5 and a fixing nut 51 for fixing the anchor member 5 therein.

[0056] After the anchor member 5 is installed, the inside of the anchor receiving groove 22 can be filled with non-shrink mortar M or epoxy.

[0057] As shown in FIG. 3 etc., the PC reinforcing block unit 2 is formed with a straight line cross section, and the PC reinforcing block unit 2 can be attached to each surface of the existing members 1a, 1b, 1c.

[0058] 10, the PC reinforcing block unit 2 may be L-shaped with corners bent to surround the corners of the existing members 1a, 1b, and 1c. In this case, the corners of the existing members 1a, 1b, and 1c are effectively restrained, thereby increasing the strength and ductility of the existing members 1a, 1b, and 1c located inside when a compressive force is applied.

[0059] FIG. 11 is a cross-sectional view showing a state in which the first outer reinforcing bar is installed in the first receiving groove.

[0060] As shown in Figure 11, a first accommodating groove portion 23 is formed in the longitudinal direction of the PC reinforcement block unit 2 on at least one or more of the outer surfaces of the PC reinforcement block unit 2, and multiple stacked PC reinforcement block units 2 have a first external reinforcement bar 6 accommodated inside the first accommodating groove portion 23 so as to cross the longitudinal direction of the PC reinforcement block unit 2, and the inside of the first accommodating groove portion 23 can be filled with filling material 4.

[0061] Since the internal reinforcing bar 3 is provided in the hollow 20 formed inside the PC reinforcing block unit 2, its position is close to the neutral axis, and there is a limit to its bending rigidity.

[0062] Therefore, a first external reinforcing bar 6 can be installed outside the PC reinforcing block assembly, which is continuous in the longitudinal direction of the PC reinforcing block assembly.

[0063] For this purpose, a first accommodating groove portion 23 is formed on the front surface of the PC reinforcement block unit 2 in the longitudinal direction of the PC reinforcement block unit 2, i.e., in the longitudinal direction of the existing components 1a, 1b, and 1c, and the first accommodating groove portions 23 of adjacent PC reinforcement block units 2 in the longitudinal direction are configured to be connected to each other.

[0064] A first external reinforcing bar 6 that crosses the multiple PC reinforcing block units 2 in the longitudinal direction of the component is housed inside the first housing groove portion 23 that is continuous in the longitudinal direction of the component.

[0065] The first external reinforcing bar 6 is a rod-shaped member such as a reinforcing bar or a steel rod capable of transmitting axial force.

[0066] The filler 4 filled inside the first receiving groove 23 may be epoxy putty, non-shrink mortar, or the like.

[0067] The epoxy putty is based on epoxy resin and is characterized by the strong strength of epoxy resin. Such epoxy putty strengthens the adhesive force with the first receiving groove portion 23 and effectively transmits stress between the first external reinforcing bar 6 and the PC reinforcing block unit 2.

[0068] FIG. 12 is a perspective view showing another embodiment of the PC reinforcement block unit, and FIG. 13 is a perspective view showing an embodiment in which the PC reinforcement block assembly is a load-bearing wall.

[0069] As shown in FIG. 13, the PC reinforcement block assembly can form a bearing wall by stacking a plurality of PC reinforcement block units 2 vertically and horizontally.

[0070] The PC reinforcing block assembly can be installed between existing columns 1a in the form of a filler wall to reinforce an existing structure.

[0071] For this reason, a plurality of PC reinforcing block units 2 stacked vertically can be arranged in multiple rows in the horizontal direction to form a load-bearing wall.

[0072] This makes it possible to reinforce the existing rigid-frame structural frame consisting of columns and beams.

[0073] As shown in Figures 12 and 13, a second accommodating groove portion 24 is formed in the width direction of the PC reinforcement block unit 2 on at least one of the front and rear surfaces of the PC reinforcement block unit 2, and horizontally adjacent PC reinforcement block units 2 have a second external reinforcement bar 7 accommodated inside the second accommodating groove portion 24 so as to cross the horizontal direction of the PC reinforcement block unit 2, and the inside of the second accommodating groove portion 24 can be filled with filling material 4.

[0074] When the PC reinforcement block assembly is configured as a load-bearing wall, it is necessary to integrate a plurality of rows of PC reinforcement block units 2 in the horizontal direction.

[0075] However, when constructing a PC reinforcement block assembly, which is a load-bearing wall, in the form of an infill wall between a pair of pillars, it is difficult to install reinforcing bars such as steel bars that penetrate the laterally adjacent PC reinforcement block units 2 due to interference between the left and right pillars.

[0076] Therefore, a second accommodating groove portion 24 is formed horizontally (widthwise) on the front and / or back of the PC reinforcement block unit 2 so as to connect to an adjacent PC reinforcement block unit 2, and a second external reinforcement bar 7 is installed inside the second accommodating groove portion 24, and then filling material 4 is filled to integrate adjacent PC reinforcement block units 2 in the horizontal direction.

[0077] The second external reinforcement bar 7 can be installed outside the PC reinforcement block assembly after the PC reinforcement block unit 2 is first installed, and therefore can be installed without interference from external members such as pillars.

[0078] When the first accommodating groove portion 23 and the second accommodating groove portion 24 are simultaneously formed on the outer surface of the PC reinforcement block unit 2, the depths of each accommodating groove portion 23, 24 can be formed to be different from each other, so that the vertical first external reinforcement bar 6 and the horizontal second external reinforcement bar 7 inserted into the accommodating groove portions 23, 24 do not interfere with each other.

[0079] FIG. 14 is a perspective view showing a Z-shaped PC reinforcement block unit, and FIG. 15 is a perspective view showing a PC reinforcement block assembly utilizing the PC reinforcement block unit shown in FIG.

[0080] As shown in Figures 14 and 15, the PC reinforcement block unit 2 is composed of a rectangular unit main body 2a, an upward extension portion 2b formed to protrude on one side above the unit main body 2a, and a downward extension portion 2c formed to protrude on the other side below the unit main body 2a, and the upper, lower, left and right PC reinforcement block units 2 are assembled by tightly fitting them together.

[0081] Each PC reinforcement block unit 2, which is stacked vertically and horizontally to form a PC reinforcement block assembly, can be configured to be folded and fitted together so that it can be firmly connected to adjacent PC reinforcement block units 2.

[0082] Specifically, the PC reinforcement block unit 2 is composed of a unit main body 2a, and an upper extension portion 2b and a lower extension portion 2c which protrude in opposite directions above and below the unit main body 2a, respectively, so that the lower portion on one side and the upper portion on the other side can be formed into a Z-shape with a step.

[0083] The stepped portions of the PC reinforcement block units 2 are fitted into the corresponding stepped portions of the adjacent PC reinforcement block units 2, and are assembled in firm contact in two directions, up, down, left and right.

[0084] The Z-shaped PC reinforcement block unit 2 may also have a first accommodating groove portion 23 and / or a second accommodating groove portion 24 formed on the front and / or back surface, and each accommodating groove portion 23, 24 may be provided with a first external reinforcement bar 6 and / or a second external reinforcement bar 7 and filled with a filler material 4.

[0085] FIG. 16 is a cross-sectional view showing the state in which an internal reinforcing bar is installed in the PC reinforcing block assembly shown in FIG.

[0086] As shown in FIG. 16, the hollow 20 may be formed vertically penetrating each of the unit main body 2a, the upward extension portion 2b, and the downward extension portion 2c.

[0087] When the PC reinforcement block unit 2 is formed in a Z-shape so that the stepped portions fit into adjacent PC reinforcement block units 2, hollows 20 can be formed in the unit body 2a and the upper and lower extension portions 2b, 2c so that the adjacent PC reinforcement block units 2 can be firmly connected to each other on the top, bottom, left and right, and internal reinforcement bars 3 can be installed through each hollow 20.

[0088] As a result, each PC reinforcement block unit 2 is interconnected with five other PC reinforcement block units 2 arranged around the PC reinforcement block unit 2. In other words, a total of six adjacent PC reinforcement block units 2 are interconnected and firmly integrated.

[0089] Fig. 17 is a perspective view showing a PC reinforcement block unit which is convex on the top and concave on the bottom, and Fig. 18 is a perspective view showing a PC reinforcement block assembly using the PC reinforcement block unit of Fig. 17. Fig. 19 is a perspective view showing another embodiment of a PC reinforcement block unit which is convex on the top and concave on the bottom, and Fig. 20 is a perspective view showing a PC reinforcement block assembly using the PC reinforcement block unit of Fig. 19.

[0090] As shown in Figures 17 to 20, the PC reinforcement block unit 2 has an upper portion formed in a convex shape and a lower portion formed in a concave shape corresponding to the upper portion, and the upper portion of the lower PC reinforcement block unit 2 can be configured to be inserted into and fitted into the lower portion of the upper PC reinforcement block unit 2.

[0091] The upper part of the PC reinforcement block unit 2 can be formed convexly and the lower part can be formed concavely so that each PC reinforcement block unit 2, which is stacked vertically, can be firmly connected to each other and resist lateral forces using the shear force of the PC reinforcement block unit 2 itself at the joints.

[0092] At this time, the upper and lower parts of the PC reinforcement block unit 2 can be formed into shapes corresponding to each other. When the PC reinforcement block units 2 are stacked, the lower PC reinforcement block unit 2 is inserted below the upper PC reinforcement block unit 2, and they can be firmly joined by being fitted together.

[0093] For this purpose, as shown in Figs. 17 and 18, a protrusion 25 may be formed at the center of the upper portion of the PC reinforcing block unit 2, and a groove 26 having a shape corresponding to the protrusion 25 may be formed at the lower portion.

[0094] As a result, when a lateral force acts, the lateral force can be resisted at the joint between the upper and lower PC reinforcement block units 2 by the shear force of the cross section of the protrusion 25.

[0095] Alternatively, as shown in Figs. 19 and 20, the upper and lower parts of the PC reinforcing block unit 2 may be formed into a wedge shape so as to correspond to each other.

[0096] In this case, the upper inclined surface of the lower PC reinforcement block unit 2 and the lower inclined surface of the upper PC reinforcement block unit 2 can accurately align the positions of the upper and lower PC reinforcement block units 2.

[0097] FIG. 21 is a perspective view showing another embodiment of a PC reinforcement block unit for reinforcing a front end wall, and FIG. 22 is a perspective view showing a PC reinforcement block assembly utilizing the PC reinforcement block unit of FIG.

[0098] As shown in FIG. 22, when an existing member 1C is a front end wall, a PC reinforcing block unit 2 can be stacked and installed on the front surface of the front end wall and fixed with an anchor member 5.

[0099] The anchor hole 21 for fastening the anchor member 5 can be formed inside the first accommodating groove portion 23 or the second accommodating groove portion 24 .

[0100] A first external reinforcing bar 6 and a second external reinforcing bar 7 are arranged in the first accommodating groove portion 23 and the second accommodating groove portion 24, respectively.

[0101] The method for constructing the PC reinforcing block assembly of the present invention relates to a method for constructing the PC reinforcing block assembly of the present invention described above with reference to Figs.

[0102] In the construction method for a PC reinforcing block assembly of the present invention, first, (a) a plurality of PC reinforcing block units 2 are stacked on the outside of existing members 1a, 1b, and 1c.

[0103] When the PC reinforcement block unit 2 is installed closely to the existing members 1a, 1b, and 1c, the undercoat and foreign matter of the existing members 1a, 1b, and 1c are removed and the surfaces are cleaned. In some cases, deteriorated covering concrete on the surfaces of the existing members 1a, 1b, and 1c can also be removed.

[0104] When the PC reinforcing block unit 2 is fixed to the existing members 1a, 1b, and 1c with the anchor members 5, anchor fixing holes can be pre-drilled at the positions where the anchor members 5 are to be installed.

[0105] The PC reinforcement block units 2 are connected to the outer surfaces of the existing members 1a, 1b, and 1c in the longitudinal direction of the members. At this time, the multiple PC reinforcement block units 2 stacked vertically are stacked so that the hollows 20 communicate with each other vertically.

[0106] The PC reinforcement block unit 2 may encase only a portion of the surfaces of the existing components 1a, 1b, 1c, or may encase the entire existing components 1a, 1b, 1c, depending on the purpose or extent of reinforcement of the existing components 1a, 1b, 1c.

[0107] Anchor members 5 are inserted through anchor holes 21 formed horizontally through the PC reinforcing block unit 2, and ends of the anchor members 5 can be inserted into the anchor fixing holes of the existing members 1a, 1b, and 1c. The anchor members 5 are fixed by injecting epoxy or the like into the anchor fixing holes.

[0108] After the anchor member 5 is fixed, a fixing nut 51 is fastened to the rear end of the anchor member 5 inside the anchor receiving groove 22 of the PC reinforcement block unit 2 to fix the PC reinforcement block unit 2 to the existing members 1a, 1b, and 1c.

[0109] The inside of the anchor receiving groove 22 is filled with non-shrink mortar or epoxy so that the rear end of the anchor member 5 is not exposed to the outside air.

[0110] Epoxy, non-shrink mortar, concrete, etc. can be injected into the spaces between the PC reinforcing block units 2 and the existing members 1a, 1b, 1c.

[0111] Next, (b) an internal reinforcing bar 3 is inserted into the hollow space 20 of the multiple PC reinforcing block units 2 stacked one above the other.

[0112] That is, after the PC reinforcing block units 2 are stacked and installed, internal reinforcing bars 3 such as reinforcing bars or steel rods are inserted into the hollows 20 that communicate vertically.

[0113] Finally, (c) the inside of the hollow 20 is filled with a filler 4 such as non-shrink mortar.

[0114] As a result, the internal reinforcement bar 3 is fixed inside the hollow 20 and integrated with the PC reinforcement block unit 2, increasing the member's resistance to axial stress and lateral force, thereby providing excellent earthquake resistance performance. [Industrial Applicability]

[0115] The PC reinforcement block assembly for earthquake reinforcement of the present invention is constructed by stacking pre-fabricated PC reinforcement block units vertically on the outside of existing components so that the hollows are connected, and has industrial applicability in that there is no risk of corrosion of the PC reinforcement block units, no need for separate fire-resistant coating, and excellent finishing quality due to factory production.

Claims

1. It is intended to reinforce existing members (1a, 1b, 1c) made of reinforced concrete, a plurality of PC reinforcing block units (2) each including a rectangular parallelepiped unit body (2a), an upward extension portion (2b) formed to protrude on one side above the unit body, and a downward extension portion (2c) formed to protrude on the other side below the unit body, the plurality of PC reinforcing block units (2) being stacked so as to fit together vertically and horizontally with a hollow (20) penetrating therethrough in the longitudinal direction; An internal reinforcing bar (3) is provided penetrating the hollow (20) of a plurality of PC reinforcing block units (2) stacked vertically; and a filler (4) that is filled into the hollows (20) of the plurality of PC reinforcement block units (2).

2. The PC reinforcement block assembly for earthquake-resistant reinforcement as described in claim 1, characterized in that a first accommodating groove portion (23) is formed in the longitudinal direction of the PC reinforcement block unit (2) on at least one of the outer surfaces of the PC reinforcement block unit (2), and the multiple PC reinforcement block units (2) stacked have a first external reinforcement bar (6) accommodated inside the first accommodating groove portion (23) so as to cross the longitudinal direction of the PC reinforcement block unit (2), and the inside of the first accommodating groove portion (23) is filled with filler material (4).

3. The PC reinforcement block assembly for earthquake-resistant reinforcement as described in claim 1, characterized in that a second accommodating groove portion (24) is formed in the width direction of the PC reinforcement block unit (2) on at least one of the front and rear surfaces of the PC reinforcement block unit (2), and the horizontally adjacent PC reinforcement block units (2) accommodate a second external reinforcement bar (7) inside the second accommodating groove portion (23) so as to cross the horizontal direction of the PC reinforcement block unit (2), and the inside of the second accommodating groove portion (24) is filled with filler material (4).

4. The PC reinforcement block assembly for earthquake-resistant reinforcement as described in claim 1, characterized in that the hollow (20) is formed vertically penetrating each of the unit main body (2a), the upper extension portion (2b), and the lower extension portion (2c).

5. A method for constructing the PC reinforcement block assembly according to claim 1, (a) stacking a plurality of PC reinforcement block units (2) on the exterior of an existing member (1a, 1b, 1c); (b) inserting and installing an internal reinforcement bar (3) into the hollow (20) of a plurality of PC reinforcement block units (2) stacked vertically; (c) filling the hollow (20) with a filler (4).

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