PC reinforcement block assembly for earthquake-resistant 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, and its construction method. Internal reinforcement bars are inserted into the hollows of PC reinforcement block units that are laminated and constructed on the exterior of existing structural members or inside structures, and then filled with filler. This assembly is easy to construct and does not require a separate fire-resistant coating, while also being able to reinforce the strength of components against axial force. [Background technology]

[0002] Recently, the frequency and magnitude of earthquakes have increased in Korea, resulting in increased damage to buildings and people. In particular, buildings constructed before 1988, when earthquake-resistant design was introduced for buildings with six floors or more, are still in use, and buildings with two floors or more or a total floor area of ​​200m2 are still in use. 2 Many of the small buildings mentioned above were built before 2017, when the scope of application 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, methods commonly used to reinforce reinforced concrete members against earthquakes included the cross-section expansion method, in which steel 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 wrap it.

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

[0005] Furthermore, the steel plate installation 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 high-strength steel plates are bent and reinforced with fillers such as epoxy mortar or polymer mortar inside, and then fixed to existing members 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, they require separate fire-resistant paint coating. Furthermore, they require constant maintenance work to prevent corrosion, and require separate exterior finishing work, which is troublesome.

[0008] In addition, reinforcing bands must be fastened to integrate the divided reinforcing panels, but in this case, the protruding reinforcing bands make it difficult to use and spoil the appearance. To omit such reinforcing bands, 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 involves installing multiple PC reinforcement panel units on existing concrete members that lack strength and connecting each unit with connectors to reinforce them. This makes the production of the reinforcement member easy and economical, and it also offers excellent on-site workability and fire resistance. Furthermore, because multiple PC reinforcement panel units are installed in succession, the PC member is small in size and weight, making it easy to handle and install. Furthermore, the reinforcement member is unitized, making it easy to apply to members of various sizes.

[0011] However, in the registered technology, PC reinforced panel units are joined by connectors that fit into keyways. Therefore, the reinforcement members mainly resist the lateral forces, i.e., shear forces, of the members, and there is a limit to the increase in the member's resistance 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 aims to provide a PC reinforcement block assembly for earthquake-resistant reinforcement, which is easy to install, does not require a separate fire-resistant coating, and can reinforce the strength of members against axial force, and a construction method thereof. [Means for solving the problem]

[0013] In a preferred embodiment, the present invention provides a PC reinforcement block assembly for earthquake-resistant reinforcement, which is intended to reinforce existing reinforced concrete members and comprises: a rectangular unit body; an upward extension portion formed above the unit body and protruding to one side; and a downward extension portion formed below the unit body and protruding to the other side; 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; internal reinforcement bars which penetrate the hollows of the plurality of PC reinforcement block units stacked vertically; and filler 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 at least one of the outer surfaces of the PC reinforcement block unit in the longitudinal direction of the PC reinforcement block unit, and a plurality of stacked PC reinforcement block units have a first external reinforcement bar accommodated inside the first accommodating groove portion so as to cross the longitudinal direction of the PC reinforcement block unit, and a filler material is filled inside the first accommodating groove portion.

[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 PC reinforcement block unit horizontally, and a filler material is filled inside the second accommodating groove portion.

[0016] According to another preferred embodiment, the present invention provides a PC reinforcement block assembly for earthquake-resistant reinforcement, characterized in that the hollows are formed by vertically penetrating 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, which comprises the steps of: (a) stacking a plurality of PC reinforcement block units on the outside of an existing member; (b) inserting and installing internal reinforcement bars into the hollows of the plurality of PC reinforcement block units stacked one above the other; and (c) filling the hollows with a filler material. [Effects of the Invention]

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

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

[0020] Secondly, construction is simple as the internal reinforcing bars are integrated with the PC reinforcing block units by filling the hollow spaces where the internal reinforcing bars are inserted with filler. In addition, multiple PC reinforcing block units are lined up in a row in the longitudinal direction, resisting not only compressive force but also shear force and bending moment, thereby increasing the strength against not only axial force but also lateral force, and demonstrating excellent seismic performance. [Brief explanation of the drawings]

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

[0022] In order to achieve the above-mentioned objectives, the PC reinforcement block assembly for earthquake-resistant reinforcement of the present invention is intended to reinforce existing reinforced concrete members, 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 filler 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 connected to one side of an existing pillar member, Figs. 5 to 8 are cross-sectional views showing the connection state of PC reinforcement block units with various cross sections and hollows, and Fig. 9 is a perspective view showing a PC reinforcement block assembly placed 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, and 1c, and is characterized by comprising a plurality of PC reinforcement block units 2 stacked one above the other and having a hollow 20 penetrating longitudinally therethrough, an internal reinforcement bar 3 provided to penetrate the hollows 20 of the plurality of PC reinforcement block units 2 stacked one above the other, and a filler material 4 filled into the hollows 20 of the plurality of PC reinforcement block units 2.

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

[0027] The PC reinforcing block assembly for earthquake-resistant reinforcement of the present invention is attached to one side of an existing reinforced concrete member that requires earthquake-resistant reinforcement, or 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 units 2 may be precast concrete blocks fabricated in advance in a factory and have reinforcing bars or reinforcing bar mesh arranged inside, or may be made of high-strength precast concrete or UHPC, which have excellent strength and ductility.

[0030] Precast concrete blocks are non-combustible, have excellent fire resistance, and are not susceptible to corrosion, eliminating the need for separate fireproofing or anti-corrosion treatments. Furthermore, they can be manufactured in factories with excellent finish quality, making them suitable for use as a final finish.

[0031] The PC reinforcing block unit 2 has a hollow 20 formed inside 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 arranged in multiple pieces in the longitudinal and / or width directions of the existing components 1a, 1b, and 1c, and are installed in close contact with or spaced apart from the existing components 1a, 1b, and 1c.

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

[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 reinforcing 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 the plurality of PC reinforcing block units 2 stacked one above the other.

[0038] That is, the internal reinforcing bar 3 is inserted into the hollows 20 of the PC reinforcing block units 2 stacked one above the other, which are connected to each other.

[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 rod, or the like.

[0041] The filler 4 is filled into the hollows 20 of the plurality of PC reinforcing block units 2.

[0042] The filler material 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. In addition, the filler material 4 connects the separated PC reinforcing block units 2 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-shrinking mortar or the like.

[0045] If the existing member is a column 1a, the PC reinforcing 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 of the existing column 1a, the rear side can be formed to be the same width as the front side of the existing column 1a in order to ensure sufficient cross-sectional area, and the front side can be formed to have an expanded cross-section.

[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, and 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 reinforcing 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. 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). In this case, the PC reinforcement block assembly serves as both a formwork and a 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, and 1c by anchor members 5 passing through 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. Then, 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 outside of the anchor hole 21 to receive the end protrusion of the anchor member 5 and a fixing nut 51 for fixing the anchor member 5 .

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

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

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

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

[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 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 a filler material 4 can be filled inside the first accommodating groove portion 23.

[0061] The internal reinforcing bar 3 is provided in the hollow 20 formed inside the PC reinforcing block unit 2, and therefore is positioned close to the neutral axis, which limits its bending rigidity.

[0062] Therefore, a first external reinforcing bar 6 can be installed outside the PC reinforcing block assembly, continuing 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 plurality of PC reinforcing block units 2 in the longitudinal direction of the member is housed inside the first housing groove portion 23 that is continuous in the longitudinal direction of the member.

[0065] The first external reinforcing bar 6 is a rod-shaped member such as a reinforcing bar or a steel rod that can transmit axial force.

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

[0067] Epoxy putty is a putty based on epoxy resin, characterized by its high strength. Such epoxy putty strengthens the adhesive strength with the first receiving groove 23, effectively transmitting 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 reinforcing block unit, and FIG. 13 is a perspective view showing an embodiment in which the PC reinforcing block assembly is a bearing wall.

[0069] As shown in FIG. 13, the PC reinforcement block assembly can be configured as 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 the existing structure.

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

[0072] This makes it possible to reinforce existing rigid-frame structural frames 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 PC reinforcement block unit 2 horizontally, and a filler material 4 can be filled inside the second accommodating groove portion 24.

[0074] When the PC reinforcing block assembly is configured as a bearing wall, it is necessary to integrate a plurality of rows of PC reinforcing 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 a filled wall between a pair of pillars, interference between the left and right pillars makes it difficult to install reinforcement bars such as steel bars through the horizontally adjacent PC reinforcement block units 2.

[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 with adjacent PC reinforcement block units 2, and after a second external reinforcement bar 7 is installed inside the second accommodating groove portion 24, filler material 4 is filled to integrate adjacent PC reinforcement block units 2 in the horizontal direction.

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

[0078] When the first and second accommodating groove portions 23 and 24 are simultaneously formed on the outer surface of the PC reinforcement block unit 2, the depths of the accommodating groove portions 23 and 24 can be made different from each other to prevent the vertical first external reinforcement bar 6 and the horizontal second external reinforcement bar 7 inserted into the accommodating groove portions 23 and 24 from interfering 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 using 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 that protrudes to one side above the unit main body 2a, and a downward extension portion 2c that protrudes to the other side below the unit main body 2a, and the upper, lower, left and right PC reinforcement block units 2 are assembled by fitting them together in close contact.

[0081] Each PC reinforcement block unit 2, which is stacked vertically and horizontally to form a PC reinforcement block assembly, can be bent and formed to fit 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 that 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 in a stepped Z-shape.

[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 tight contact with each other in both the up and down directions and the left and right directions.

[0084] The Z-shaped PC reinforcement block unit 2 may also have a first receiving groove 23 and / or a second receiving groove 24 formed on the front and / or back surface, and each receiving groove 23, 24 may be provided with a first external reinforcement bar 6 and / or a second external reinforcement bar 7, and may be filled with a filler 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 to penetrate vertically through the unit main body 2a, the upper extension portion 2b, and the lower extension portion 2c.

[0087] When the PC reinforcement block unit 2 is formed in a Z-shape so that the stepped portions of adjacent PC reinforcement block units 2 fit together, hollows 20 can be formed in the unit body 2a and the upper and lower extension portions 2b, 2c so that the surrounding PC reinforcement block units 2 adjacent to each other on the top, bottom, left and right can be firmly connected to each other, 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 that is convex on top and concave on 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 that is convex on top and concave on 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 can be configured so that the upper part is formed convexly and the lower part is formed concavely in a shape corresponding to the upper part, and the upper part of the lower PC reinforcement block unit 2 is inserted into the lower part of the upper PC reinforcement block unit 2 and fitted together.

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

[0092] At this time, the upper and lower parts of the PC reinforcement block unit 2 may be formed in corresponding shapes. 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 may be fitted together and firmly joined.

[0093] For this purpose, as shown in Figures 17 and 18, a protrusion 25 may be formed at the center of the upper part 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 part.

[0094] As a result, when a lateral force is applied, 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 in 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 using the PC reinforcement block unit of FIG.

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

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

[0100] The first and second receiving grooves 23 and 24 are provided with a first external reinforcing bar 6 and a second external reinforcing bar 7, respectively.

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

[0102] In the method for constructing 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 in close contact with the existing members 1a, 1b, and 1c, the surface of the existing members 1a, 1b, and 1c is cleaned by removing the primer paint and foreign matter. In some cases, deteriorated covering concrete on the surface 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 using the anchor members 5, anchor fixing holes can be drilled in advance at the positions where the anchor members 5 are to be installed.

[0105] The PC reinforcement block units 2 are installed in series on 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 one on top of the other are stacked so that the hollows 20 are connected to each other vertically.

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

[0107] Anchor members 5 can be 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. Epoxy or the like is injected into the anchor fixing holes to fix the anchor members 5.

[0108] After the anchor member 5 is fixed, a fixing nut 51 is tightened 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-shrinkage 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, and 1c.

[0111] Next, (b) an internal reinforcing bar 3 is inserted into the hollow 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 with each other from top to bottom.

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

[0114] This allows the internal reinforcement bar 3 to be 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 and providing excellent earthquake resistance performance. [Industrial Applicability]

[0115] The PC reinforcement block assembly for earthquake-resistant reinforcement of the present invention is constructed by stacking pre-fabricated PC reinforcement block units on top of each other in a factory so that the hollows are connected to the outside of existing components. This eliminates the risk of corrosion of the PC reinforcement block units, does not require separate fire-resistant coating, and has industrial applicability in that it is factory-produced and has excellent finish quality.

Claims

1. It is intended to reinforce existing reinforced concrete members (1a, 1b, 1c), a plurality of PC reinforcement block units (2) each including a rectangular parallelepiped unit body (2a), an upward extension portion (2b) formed above the unit body and protruding to one side, and a downward extension portion (2c) formed below the unit body and protruding to the other side, the PC reinforcement block units (2) having a hollow (20) penetrating longitudinally therethrough and stacked so as to interlock with each other vertically and horizontally; An internal reinforcing bar (3) is provided to penetrate the hollow (20) of a plurality of PC reinforcing block units (2) stacked one above the other; and a filler (4) that fills the hollows (20) of the plurality of PC reinforcing block units (2), The PC reinforcement block assembly for earthquake-resistant reinforcement is characterized in that the upper extension portion (2b) and unit body (2a) of an adjacent PC reinforcement block unit (2) are respectively placed on top of the unit body (2a) and downward extension portion (2c) of the PC reinforcement block unit (2), and adjacent PC reinforcement block units 2 are stacked so that they are shifted relative to each other vertically and interlock with each other.

2. 2. The PC reinforcement block assembly for earthquake-resistant reinforcement 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 in the stacked PC reinforcement block units (2), a first external reinforcement bar (6) is accommodated inside the first accommodating groove portion (23) so as to cross the longitudinal direction of the PC reinforcement block unit (2), and a filler material (4) is filled inside the first accommodating groove portion (23).

3. 2. The PC reinforcement block assembly for earthquake-resistant reinforcement 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 horizontally adjacent PC reinforcement block units (2) accommodate a second external reinforcement bar (7) inside the second accommodating groove portion (24) so ​​as to cross the PC reinforcement block unit (2) horizontally, and a filler (4) is filled inside the second accommodating groove portion (24).

4. The PC reinforcement block assembly for earthquake-resistant reinforcement described in claim 1, characterized in that the hollow (20) is formed vertically penetrating 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 existing members (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 one above the other; (c) filling the hollow (20) with a filler (4).

Images