Earthquake-resistant slit structure and reinforced concrete structure using it

Abstract

To provide a seismic slit structure that can be installed more economically with making the use of an existing formwork possible, and a reinforced concrete structure that utilizes the same.SOLUTION: A seismic slit structure 2 comprises at least one reinforcing bar 10 reinforced for a cement-based hardened material 11, a seismic slit material 3 having a shear surface wall 31 facing the reinforcing bar 10 at intervals in a diameter direction of the reinforcing bar, a wire 4 wrapped around the seismic slit material 3 and the reinforcing bar 10 to support the seismic slit material 3, the cement-based hardened material 11 that is provided so as to contact the shear surface wall 31 of the seismic slit material 3 and is integrally enclosed with the reinforcing bar 10 and the wire 4. The seismic slit material 3 is supported against the pressure of cement-based paste being poured. In the seismic slit structure, the seismic slit material 3 is accurately integrated into the designed position within the cement-based hardened material 11.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the technology of earthquake-resistant slit materials that increase the earthquake resistance strength of reinforced concrete buildings, and relates to an earthquake-resistant slit structure that accurately positions earthquake-resistant slit materials when constructing a reinforced concrete building, and a reinforced concrete structure that uses the same. [Background technology]

[0002] In conventional earthquake-resistant slit structures, when concrete is poured during new construction or renovation work, the earthquake-resistant slit materials installed within the formwork can bend or shift under the pressure of the injected cement paste, causing them to be positioned differently than designed, and preventing them from fulfilling their intended function as earthquake-resistant slit structures.

[0003] As a technique for preventing bending or displacement of earthquake-resistant slit materials in new construction work, for example, Patent Document 1 (Patent Publication No. 5089141) describes a reinforcing metal fitting that connects an earthquake-resistant slit material and a separator interposed between an outer formwork and an inner formwork into which concrete is poured, and reinforces the earthquake-resistant slit material, and that has a stopper that engages with a holding frame that holds the side of the plate material of the earthquake-resistant slit material, a clip that engages with the separator, and a connecting rod that connects the stopper and the clip. The stopper has an engaging portion on one side of the base portion of the stopper that engages with the retaining frame, and a connecting portion on the other side of the base portion that connects to the connecting rod, the clip is attached to one end of the connecting rod in an adjustable mounting position and engages with the separator, and the other end of the connecting rod is connected to the connecting portion, and a reinforcing fitting for an earthquake-resistant slit material is shown that makes it easy to firmly connect the earthquake-resistant slit material to the separator and can reduce construction time (i.e., construction costs, etc.).

[0004] Furthermore, Patent Document 2 (Japanese Patent No. 6120194) discloses a first and second formwork structure having formwork installed side by side and a slit crosspiece fixed between the formwork at the installation position of the earthquake-resistant slit material. The cross-sectional shape of the slit crosspiece is a hexagonal shape formed by integrating a trapezoidal section and a square section, and the square section is sandwiched and fixed between adjacent formwork, and a support member for the earthquake-resistant slit material is fitted and installed into the trapezoidal section. The document discloses an earthquake-resistant slit material installation structure and construction method that firmly fixes the earthquake-resistant slit material to the first and second formwork structures to prevent it from falling off due to concrete pressure, significantly simplifies the work process, and ensures a reliable finish to the concrete surface. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5089141 [Patent Document 2] Patent No. 6120194 Summary of the Invention [Problem to be solved by the invention]

[0006] However, like the reinforcing metal fittings for earthquake-resistant slit materials shown in the aforementioned Patent Document 1, in which the earthquake-resistant slit material and separator interposed between the outer and inner formwork are firmly connected to withstand the pressure of pouring concrete during construction, these are effective for installing earthquake-resistant slit materials in newly constructed buildings. However, if, for example, the separator is not firmly fixed between the outer and inner formwork, there is a concern that it will not be able to withstand the pressure of pouring concrete and will move out of its designed position together with the earthquake-resistant slit material.

[0007] In addition, in the method of installing slit materials shown in Patent Document 2, a core bit rotated by a drilling machine is used to drill continuous holes in a wall. When drilling continuous holes along the corners of a wall and a column, beam, or slab, the drilling machine must be spaced far enough away from the column, beam, or slab to avoid interfering with the column, beam, or slab. While drilling seismic slit materials along the edge of the column, beam, or slab is ideal, this is difficult to achieve. This is because, during post-construction work for installing seismic slits, the structural design of the machinery used to remove the concrete structure (hereinafter referred to as the "structure"), such as by cutting or milling, inevitably shifts the installation location depending on the work site. However, it would be more desirable to install the slits near the column, beam, or slab, which is the ideal location for wing walls and other structures.

[0008] In view of the above situation, one of the objectives of the present invention is to provide an earthquake-resistant slit structure that allows the use of existing formwork and can be installed more economically and in a more accurate position, a method for installing the slit material, and a reinforced concrete structure that utilizes the same.

[0009] Furthermore, when a wide excavation is made in an exterior wall to install slit members in an internal corner, the excavated groove must be sealed with cement paste or the like after the slit members are installed. In this case, a partition wall must be installed to function as a formwork for the cement paste to be poured into the groove and to prevent the bottom of the excavated groove from collapsing due to the injection pressure. Therefore, one of the objectives of the present invention is to provide a construction method that can more accurately support the partition wall that forms the bottom of the excavated groove, and a reinforced concrete structure formed by this construction method.

[0010] Furthermore, in the past, when retrofitting earthquake-resistant slits in the corners of existing reinforced concrete buildings, it was unavoidable for the drilling machine to interfere with the columns, beams, or slabs, so the slits had to be installed at a distance. In view of this situation, one of the objectives of the present invention is to provide an earthquake-resistant slit material that can be installed in an ideal position between the columns, beams, or slabs and the corner walls of the corners of existing reinforced concrete buildings, and a method for installing the same.

[0011] The reinforcing bars are the object to which the wires are attached in the earthquake-resistant slit structure of the present invention and in the object (e.g., a reinforced concrete building) in which the reinforced concrete structure using the same is installed. They function as reinforcing bars for reinforced concrete. In addition to deformed steel bars, they may be bolts, bolts with nuts threaded thereon, or bolts with anchor bolts at the end and integrated with nuts or welding, and washers, nuts, etc. may be threaded onto the fastening portion of the wire. A knob-shaped protrusion is provided by welding or adhesive, which can prevent the wire from shifting in the axial direction of the reinforcing bar. In addition to wires, reinforcing bars can also be the object to which the connecting metal fittings at both ends and spacers, which will be described later, are attached.

[0012] Earthquake-resistant slit materials are placed between walls and columns, beams, or slabs to buffer stresses caused by earthquakes. For example, they can be vertically, horizontally, or inclined. That is, they can be installed in locations where earthquake-resistant slit materials have previously been installed, such as corner walls, flower stands, beams, and staircases. These earthquake-resistant slit materials can be penetrated by one or more anti-vibration bars. Furthermore, these earthquake-resistant slit materials can be made of foamed plastic insulation materials such as polyethylene foam, polystyrene foam, urethane foam, and phenolic foam; fibrous insulation materials such as rock wool, glass wool, cellulose fiber, and insulation board; or combinations thereof. They can also be fitted with a rigid resin or metal retaining frame. It is desirable to provide these earthquake-resistant slits with components for securing or holding wires, such as hooks or holes, or through-holes that run through their length. The earthquake-resistant slit material can also be fixed by passing the wire through the through-hole. At this time, a sleeve can be provided inside the hole to prevent deformation by the wire, to ensure strength, or to make it easier to pass the wire through.

[0013] The wire is wound around and connected to reinforcing bars, hoop reinforcing bars, or separator fittings of formwork panels placed close to the earthquake-resistant slit material so that the earthquake-resistant slit material maintains its designed installation position against the pressure of the injected cement paste. This wire can be replaced with string-like ropes, and can be resin wire, metal wire, or twisted wires thereof, or can also be iron wire, stainless steel wire, etc. In particular, when installing earthquake-resistant slit materials during the construction of a building (new construction), the wires can be used to fix the slit materials in place. To do this, the wires can be used to connect the slit materials to rebars, hoop rebars, or separator fittings of formwork panels that are present near the installation position, fixing the slit materials in place and preventing them from moving or deforming due to lateral pressure when inorganic building filler materials such as concrete or mortar are filled in. Furthermore, when installing slit members in an existing building, the wire can be connected to both retaining frames installed at each of the exterior ends of the seismic slit member along its entire length. The wire wound around both retaining frames can prevent the seismic slit member from rotating around an axis parallel to the reinforcing bars and around an axis perpendicular to the reinforcing bars, even when the pressure of the cementitious paste is applied unevenly to the shear surface wall of the seismic slit member. When the cementitious paste hardens into a hardened cementitious material, the wire becomes integrated with the hardened cementitious material and becomes part of the reinforced concrete structure and the object (e.g., a reinforced concrete building) on ​​which it is installed.

[0014] The cementitious hardened product integrally encapsulates the rebars and wires and becomes part of the reinforced concrete structure and the object to which it is attached (for example, a reinforced concrete building). The cementitious hardened product can be selected from, for example, cement, mortar, polymer cement, polymer mortar, grout, Portland cement, blended cement, special cement, etc., as well as putty material, plaster material, sealant, sealing material, synthetic resin, adhesive, etc., or a mixture or combination thereof.

[0015] The present invention provides an earthquake-resistant slit structure comprising: reinforcing bars arranged for a cement-based hardened material; earthquake-resistant slit materials arranged near the reinforcing bars and having shear surface walls on both sides in the thickness direction facing each other at a distance in the diameter direction of the reinforcing bars; wires wound around the earthquake-resistant slit material and the reinforcing bars to support the earthquake-resistant slit material; and a cement-based hardened material arranged so as to contact the shear surface walls on at least both sides of the earthquake-resistant slit material and in which the reinforcing bars and wire are integrally enclosed.

[0016] When constructing a building (new construction), the earthquake-resistant slit material is connected and fixed to the rebars that make up the reinforced concrete structure via wires. When pressure (lateral pressure) from the injection of cement paste material during construction acts on the shear plane walls on both sides of the earthquake-resistant slit material, the wires function to maintain the earthquake-resistant slit material in its installed position against that pressure. When the cement-based paste hardens, the earthquake-resistant slit material is accurately positioned and integrated into the hardened cement-based material as designed. However, the connection of the slit material to the rebars can also be achieved by fixing the wires to other components such as vibration-resistance braces. Such earthquake-resistant slit material can be installed by an earthquake-resistant slit material installation method for installing earthquake-resistant slit material in a buried state in an architectural structure, the method comprising an earthquake-resistant slit material installation step for installing the earthquake-resistant slit material at the buried location, and an earthquake-resistant slit material fixing step for fixing the installed earthquake-resistant slit material to the reinforcing steel frame within the architectural structure with wire.

[0017] The present invention also provides an earthquake-resistant slit structure in which connecting fittings at both ends are bridged and connected between the reinforcing bars and both longitudinal ends of the earthquake-resistant slit material, and are integrally encapsulated in the cement-based hardened material.

[0018] The double-ended connecting fittings support the gap between the reinforcing bar and the earthquake-resistant slit material and assist and strengthen the connection between the reinforcing bar and the earthquake-resistant slit material using the wire wound around them. The double-ended connecting fittings can be made of a hard material strong enough to support the gap between the reinforcing bar and both ends of the earthquake-resistant slit material. The double-ended connecting fittings can have, for example, two connecting portions connected along the longitudinal ends of the earthquake-resistant slit material and an attachment portion connected to the reinforcing bar. The two connecting portions can be connected to corresponding retaining frames. This prevents the earthquake-resistant slit material from rotating around an axis parallel to the reinforcing bar and around an axis perpendicular to the reinforcing bar. The connecting portions can be, for example, a screw connection formed by a through-hole, a connection formed by adhesive, a fitting portion to the retaining frame, a welded portion to the retaining frame, or the like. The attachment portion to the reinforcing bar can be a mounting hole formed by a through-hole, a welded portion to the reinforcing bar, or a clip that clamps to the reinforcing bar. The connecting fittings at both ends can be made of, for example, synthetic resin, metal, cement, or the like, or can be made of reinforcing bars, metal plates, or the like.

[0019] The present invention provides the earthquake-resistant slit structure, in which a spacer that is connected to the midpoint between both ends of the reinforcing bar and abuts against the shear surface wall of the earthquake-resistant slit material is integrally encapsulated in the cement-based hardened material.

[0020] The spacer maintains the distance between the midpoint between both ends of the reinforcing bar and the shear surface wall of the seismic slit material. The spacer supports the position and posture of the seismic slit material until the injected cementitious paste hardens and after it has been integrated into the hardened cementitious material. The spacer can be welded to the midpoint between both ends of the reinforcing bar, or fixed with a reinforcing bar tying material such as annealed iron wire or resin binding bands, or pipe band hardware. The spacer can be rod-shaped, plate-shaped, block-shaped, or the like.

[0021] In the present invention, a vertical reinforcement or formwork separator metal fitting is arranged in the wall thickness dimension of the horizontal end of a vertical wall that forms the edge of an internal corner of a reinforced concrete building, a vertical reinforcement or hoop reinforcing bar arranged in the wall thickness dimension of an adjacent column or adjacent vertical wall that faces the horizontal end of the vertical wall across the edge of the internal corner, an earthquake-resistant slit material that is arranged between the horizontal end of the vertical wall facing the internal corner and the adjacent column or adjacent vertical wall, and has both shear surface walls that face each other at an interval in the diameter direction of each vertical reinforcement, and a seismic slit material that is connected by bridging between the upper and lower ends of the earthquake-resistant slit material and at least one of the vertical reinforcement, formwork separator metal fitting, or hoop reinforcing bar, and the earthquake-resistant slit material is The present invention provides a reinforced concrete structure that utilizes the earthquake-resistant slit structure, comprising: connecting metal fittings at both ends that support an earthquake-resistant slit material; a wire that is wound around the earthquake-resistant slit material and at least the other of the vertical reinforcement, formwork separator metal fittings, or hoop reinforcing bar and supports the earthquake-resistant slit material; a cement-based hardened material that is provided so as to contact the shear surface wall of the earthquake-resistant slit material and that integrally contains the vertical reinforcement, both end connecting metal fittings, and wire, and that forms a vertical wall that forms the edge of the recessed corner, and an adjacent column or adjacent vertical wall that faces the horizontal end of the vertical wall across the edge of the recessed corner; and a seal provided on the outdoor side of the earthquake-resistant slit material.

[0022] The earthquake-resistant slit structure can accurately support the earthquake-resistant slit material in a vertical position at the designed position against the injection pressure of the cement paste during construction. The earthquake-resistant slit structure can have the earthquake-resistant slit material in a vertical position.

[0023] The present invention also provides a method for retrofitting earthquake-resistant slit materials into corners of existing buildings, and an earthquake-resistant slit structure equipped with the earthquake-resistant slit materials. That is, the present invention provides a post-installation method for earthquake-resistant slit materials for installation locations including recessed corners (including locations where earthquake-resistant slit materials are installed in waist walls under windows, etc.), which comprises the following steps: an excavation step of excavating one wall surface at the recessed corner in the thickness direction along the extension direction of the recessed corner; an earthquake-resistant slit material installation step of installing earthquake-resistant slit materials along the other wall surface of the excavated trench; a partition body installation step of installing a plate-shaped partition body so as to cover the bottom surface of the excavated trench (the surface at the back of the trench); a reinforcing bar installation step of installing at least one reinforcing bar within the excavated trench, extending in the length direction of the trench (the direction in which the bottom surface of the groove extends); and a partition body support step of supporting the partition body by wrapping wire around the installed reinforcing bar and the partition body.

[0024] This construction method can be used to create an earthquake-resistant slit structure with earthquake-resistant slit materials installed in the correct positions. That is, an earthquake-resistant slit structure can be provided that includes a plate-like partition wall installed on the bottom surface of a groove excavated in an earthquake-resistant slit material installation location, including an internal corner (including an earthquake-resistant slit material installation location in a spandrel wall under a window), an earthquake-resistant slit material attached to the excavated wall surface, at least one reinforcing bar installed in the excavated groove so as to extend along the extension direction of the groove, a wire wound around the partition wall and the reinforcing bar to support the partition wall, and a cement-based hardened material installed in contact with at least the surface of the earthquake-resistant slit material facing the reinforcing bar and containing the reinforcing bar and wire.

[0025] The partition wall functions as a formwork to hold back the injected cementitious paste, and is connected to the rebar with wires, so that when pressure from the injected cementitious paste is applied, the partition wall maintains its position and prevents the cementitious paste from leaking beyond the partition wall. When the cementitious paste hardens and becomes a cementitious hardened material, the partition wall becomes integrated with the hardened cementitious material and becomes part of the reinforced concrete structure and the object (e.g., a reinforced concrete building) on ​​which it is installed.

[0026] The partition wall may be made of a hard material to provide sufficient strength for use as a cement formwork or as part of a reinforced concrete structure. At least a portion of the partition wall may have thermal insulation, fire resistance, sound insulation, or waterproofing properties. For example, the partition wall may be made of foamed plastic insulation materials such as polyethylene foam, polystyrene foam, urethane foam, or phenolic foam; fiber insulation materials such as rock wool, glass wool, cellulose fiber, or insulation board; resin plates, cement plates, metal plates, metal plate-shaped pipes, or combinations thereof. Furthermore, any of these may be fitted with a hard resin or metal retaining frame. For example, the aforementioned plate-shaped earthquake-resistant slit material may also be used.

[0027] The bulkhead may have an engaging portion, such as a convex portion, a hook-shaped portion, or a concave groove portion, with which the wire can be engaged, at least at one location on the bulkhead surface around which the wire is wound. One or more tubular passages for the wire, which are connected to each other and allow the wire to be inserted, may be provided between both ends of the bulkhead surface in a direction parallel to the rebar. The retaining frame may have an engaging portion, a fitting portion, or a screw hole that can be engaged with a connecting fitting, or a screw hole that allows the connecting fitting to be screwed together.

[0028] In the present invention, a spacer, which is connected to the midpoint between the ends of the reinforcing bars and abuts against the partition wall surface of the partition wall, can also be integrally incorporated into the cementitious hardened material. The spacer maintains the distance between the midpoint between the ends of the reinforcing bars and the partition wall surface of the partition wall, supporting the position and orientation of the partition wall until the injected cementitious paste hardens and after it is integrated into the cementitious hardened material. The spacer can be welded to the midpoint between the ends of the reinforcing bars, or fixed with a reinforcing bar tying material such as annealed iron wire or resin binding bands, or pipe band hardware. The spacer can be rod-shaped, plate-shaped, block-shaped, or the like.

[0029] In the present invention, an oblong cylindrical hole is drilled from the outdoor end of the corner wall to the indoor end at the edge of the corner of a reinforced concrete building between a column, beam or slab and the corner wall, or from that edge to the width of a conventional earthquake-resistant slit in the corner wall, and is set to a width equivalent to the diameter of the drilling machine and a length obtained by subtracting a length equivalent to the radius of the drilling machine from both ends of the distance between the ends of the corner wall in a direction perpendicular to the width direction and along the corner, and a small opening is formed at each of the edges of the oblong cylindrical hole near both ends in the direction along the corner, and the indoor end of the oblong cylindrical hole is inserted into the partition wall. the partition body is placed in a vertical direction, the reinforcing bar is stretched between both ends of the oblong cylindrical hole in the direction along the corner closest to the exterior, the wire is wound around the partition body and the reinforcing bar to support the partition body, a slit material is inserted between the small ends of both ends of the oblong cylindrical hole in the direction along the corner so as to contact a column, beam or slab, a cement-based hardened material integrated with the reinforcing bar and wire is provided in the area surrounded by the slit material and the partition body, excluding the outdoor side of the slit material of the oblong cylindrical hole, and a seal is provided on the outdoor side of the slit material.

[0030] By drilling an oblong cylindrical hole at the edge between the column, beam, or slab of the inside corner and the inside corner wall, or in a drilling range that includes the width of a conventional seismic slit in the inside corner wall from that edge and is set to a width equivalent to the diameter of the drilling machine, it becomes possible to provide a slit material at the edge between the column, beam, or slab and the inside corner wall. Either the partition body or the slit material can be placed in the oblong cylindrical hole first, but placing the partition body first and then the slit material may make it more efficient to wrap wire around the partition body, waterproof it, and so on.

[0031] (Details that lead to defects and a change in thinking to deal with them) For post-installed slits in structures built to the old standards, slight deviations from the intended installation position are considered to be within the acceptable range based on structural calculations and experimental data, but for correction cases such as bending of slit materials in newly constructed slits under the new standards, due to the issues mentioned above and from the perspective of protecting proprietary assets, it is believed that corrections should be made to the original position indicated on the drawings or with equivalent specifications.

[0032] When installing new slits during new construction, there are various methods, such as sandwiching the slit material on both sides of the formwork, using joint rods (which become the grooves for the final seal), tying the slit material to the rebar to secure it, or securing it with a stopper, etc. If the slit material falls over, collapses, or moves, it will be difficult to correct after the building is completed.

[0033] Therefore, work is required to break or scrape the frame right up to the interior material and remove any bent slit material. Even if careful work is done to avoid damaging the sprayed urethane insulation on the interior side during the slit material removal process, it is difficult to leave it intact. Furthermore, when working from the exterior, the insulation is installed at the very back of the interior, with a width of about 30 mm, making repairing the sprayed urethane insulation extremely difficult. So, we came up with a reverse approach. We came up with the idea that we could solve the problem by first removing anything that would break no matter what, and then inserting structural parts that would perform even better than before, restoring the structure to an even better condition, and this led to the completion of this invention.

[0034] (Construction procedure) Use a bit large enough to fit close to the corner wall column (or beam or slab), for example a bit with an outer diameter of 110 mm, to remove all concrete and unnecessary materials. Using a drilling core type bit (either wet core or dry core construction is fine), stop when about 10 mm of wall thickness remains, and drill without pouring water while collecting the remaining concrete and insulation (this also serves to measure the exact wall thickness). When doing this, it seems fine to drill the first hole through both the concrete and insulation, or leave only a small amount, but take measures to seal the hole in a later process to prevent water and dust from entering the interior.

[0035] Depending on the conditions of the oval cylindrical hole, continuous drilling is performed using wet, dry, or equivalent methods to form a series of holes, and then the centers of the bits are drilled to correspond to the contact points of adjacent holes. The wavy convex portions remaining on the oval inner wall are smoothed using, for example, a countersink bit or cup wheel with an outer diameter of 30 mm to 100 mm. The smoothing process for the wavy convex portions can be omitted if it is not necessary for cost or other reasons.

[0036] After drilling, the inside of the cylindrical hole can be cleaned with a brush or other tool, and then anti-rust material (JIS standard, F4 Star product) can be applied to the cut and exposed rebar. Multiple anchor parts, etc., can be installed (by driving into pilot holes, etc.) at predetermined intervals on the inner wall (corner wall) of the cylindrical hole, excluding the column (beam or slab), to be integrated with the cement-based hardened material (e.g., grout) that will be filled and hardened later. The cement-based hardened material (e.g., grout) injected into the cylindrical hole and hardened can be integrated with the multiple anchor parts, etc., installed at predetermined intervals on the inner wall (corner wall) of the cylindrical hole, excluding the column (beam or slab).

[0037] After the vertical slit material installed at the time of new construction has been removed, the new earthquake-resistant slit material is attached to the side of the column face of the oblong cylindrical hole. To do this, 3 / 8 anchors, for example, are driven into the appropriate positions on both ends of the inner wall of the oblong cylindrical hole in the cut-out frame, along the direction of the inside corner, and full screws, nuts, double washers, etc. are installed. The new hard slit material (partition wall), which also serves as the interior formwork, and the fixing wire are pulled and secured with special fasteners, hook-and-loop fasteners, washers, nuts, etc. This seals off the bottom (inside) of the oblong cylindrical hole. Next, the earthquake-resistant slit material is attached to the column side.

[0038] Next, waterproofing or water-stopping materials such as butyl rubber sheets are applied to all areas that require water-stopping between the new construction hard slit material (partition wall) that serves as the interior material formwork and the oblong cylindrical hole, and a sealant is also used to enhance the water-stopping effect. As a result, even if a cement-based hardened material (such as grout) is poured into the oblong cylindrical hole, the water will not leak into the interior. Long nuts or similar are connected to the upper and lower full-thread screws to prevent the cement-based hardened material that will be injected in the subsequent process from falling out. Various structures can be used in this process, such as attaching sheets, driving pins, or using wire to prevent the cement-based hardened material (such as grout) from falling out.

[0039] A masking material can be attached to the area corresponding to the outdoor end of the sealant (the area that will become the groove for the final seal), and after the cement-based hardened material (e.g., grout) is poured, the masking material can be peeled off and the sealant can be applied to that area as a seal. [Effects of the Invention]

[0040] According to the earthquake-resistant slit structure of the present invention, since wire is wound around at least one reinforcing bar arranged for the cementitious hardened material and the earthquake-resistant slit material, the earthquake-resistant slit material is supported against the pressure of pouring the cementitious paste. This has the excellent effect of allowing the earthquake-resistant slit material to be accurately integrated into the cementitious hardened material at the designed position.

[0041] Furthermore, when an earthquake-resistant slit material is placed between at least two rebars facing each other and supported by a wire wound between the rebars, the earthquake-resistant slit material can be supported more firmly. In addition, when connecting metal fittings, spacers, etc. are provided on both ends, the installation position of the earthquake-resistant slit material can be supported more accurately.

[0042] In the reinforced concrete structure of the present invention, by utilizing an earthquake-resistant slit structure fixed with wire or other linear material, the earthquake-resistant slit material is firmly supported by the reinforcing bars for the cement-based hardened material, and the vertically installed earthquake-resistant slit material is accurately integrated into the cement-based hardened material at the designed position. Since the vertically or horizontally installed earthquake-resistant slit material is accurately positioned at the corner of the reinforced concrete building, as designed, it is possible to provide a building with even greater earthquake resistance.

[0043] According to the reinforced concrete structure of the present invention, the partition wall body is connected to the reinforcing bars by wires, and the reinforcing bars and wires are integrally contained within the cement-based hardened material.Therefore, even if there is no support structure on the partition wall surface opposite to the partition wall surface that receives the injection pressure of the cement-based paste of the partition wall body, it can achieve the excellent effect of being able to maintain the designed arrangement against the injection pressure of the cement-based paste.

[0044] In addition, a reinforced concrete structure in which upper and lower connecting fittings are slung and connected between the reinforcing bars and both ends of the partition body supports the partition body, which would otherwise fall toward the reinforcing bars due to the tension of the wire alone, by firmly maintaining the distance from the reinforcing bars, thereby more accurately maintaining the installation position of the partition body.

[0045] In addition, a reinforced concrete structure in which a spacer that is connected to the middle part between both ends of the reinforcing bar and abuts the partition surface of the partition body is integrally incorporated into the cement-based hardened material has the effect of preventing deformation and shifting of the partition surface and more reliably preventing the cement-based hardened material from falling off together with the reinforcing bar.

[0046] The earthquake-resistant slit using the reinforced concrete structure of the present invention makes it possible to provide an earthquake-resistant slit installed between a corner column, beam or slab and a corner wall, which has previously been considered difficult to install. [Brief explanation of the drawings]

[0047] [Figure 1]1 is a plan view showing a cross section of an earthquake-resistant slit structure 2 of a reinforced concrete structure 1. FIG. [Figure 2] 1 is a perspective view showing a reinforced concrete structure 1 having earthquake-resistant slit members 3 in a vertical position. [Figure 3] 1 is a plan view showing a cross section of a reinforced concrete structure 1 having connecting fittings 5 ​​at both ends. [Figure 4] 1 is a perspective view showing a reinforced concrete structure 1 having a spacer 6. FIG. [Figure 5] (a) A front view from the outside showing a cross section of a column 14 at a corner 12 of an existing reinforced concrete building 1, and (b) a cross section of the AA line portion. [Figure 6] A front view from the outside showing the drilling range DR at the corner 12 of an existing reinforced concrete building 1. [Figure 7] (a) A front view showing the process of drilling an elongated cylindrical hole 100 into a corner 12 of an existing reinforced concrete building 1, and (b) a cross-sectional view of the AA line portion. [Figure 8] (a) A front view showing the process of drilling an elongated cylindrical hole 100 into a corner 12 of an existing reinforced concrete building 1, and (b) a cross-sectional view of the AA line portion. [Figure 9] (a) Front view showing an elongated cylindrical hole 100 drilled in a corner 12 of an existing reinforced concrete building 1, and (b) a cross-sectional view of the same along line AA. [Figure 10] (a) is a front view showing an elongated cylindrical hole 100 and ends 101 machined at both ends thereof, and (b) is a cross-sectional view of the hole along line AA. [Figure 11] 3 is a cross-sectional plan view showing a partition body 110 and a slit member 3 disposed in an elongated cylindrical hole 100. FIG. [Figure 12] FIG. 2 is a perspective view showing a partition body 110 disposed in an elongated cylindrical hole 100. [Figure 13] 1 is a perspective view showing a partition body 110, a reinforcing bar 10, and a spacer 6 arranged in an elongated cylindrical hole 100. FIG. [Figure 14] (a) is a perspective view showing the state in which the wire 4 is wound, and (b) is a perspective view showing the state in which the grout CM is installed. [Figure 15](a) is a perspective view showing the state of installation of the seal 8, and (b) is a front view showing the earthquake-resistant slit 3. [Figure 16] 10 is a perspective view showing a complementary member 110a of the connecting fitting 5 and the partition member 110. FIG. [Figure 17] FIG. 3 is a cross-sectional plan view showing the arrangement of the connecting fittings 5. [Figure 18] 10 is a flowchart showing the construction method for earthquake-resistant slits. DETAILED DESCRIPTION OF THE INVENTION

[0048] [Embodiment 1] Hereinafter, an earthquake-resistant slit structure 2 according to this embodiment and a reinforced concrete structure 1 using the same will be specifically described with reference to the drawings. In particular, this embodiment shows a reinforced concrete structure 1 in which the earthquake-resistant slit structure 2 is provided at the edge 12 of a corner of a reinforced concrete building 1. Below, as shown in Figs. 1 to 4, the structure of the earthquake-resistant slit structure 2 and the reinforced concrete structure 1 using the same will be shown in accordance with the construction process.

[0049] As shown in Figures 1 to 4, the earthquake-resistant slit structure 2 is installed during the construction of a reinforced concrete building 1. The earthquake-resistant slit structure 2 is installed during the construction stage when reinforcing bars 10 as members for reinforced concrete are arranged, formwork (not shown) is assembled to form the wall surfaces of the interior and exterior walls of the reinforced concrete building 1, and earthquake-resistant slit members 3 are arranged. The position at which the earthquake-resistant slit members 3 of the earthquake-resistant slit structure 2 are installed can be, for example, the edge 12 of the recessed corner between the horizontal end 13 of a vertical wall and the adjacent column 14 adjacent thereto.

[0050] In the embodiment shown in FIGS. 1 to 4 , the vertically oriented earthquake-resistant slit material 3 is fixed by using separator metal fittings 19 that firmly fasten the formwork that forms the vertical wall that forms the corner edge 12 of the reinforced concrete building 1, and by using vertical reinforcement 10 arranged within the wall thickness of an adjacent column 14 (or adjacent vertical wall) that faces the horizontal end 13 of the vertical wall across the corner edge 12. The reinforcing bars 10 that support the earthquake-resistant slit material 3 may be deformed reinforcing bars 10 or hoop reinforcing bars that are arranged around the deformed reinforcing bars. Furthermore, the separator metal fittings 19 on the opposite side of the reinforcing bars 10 may be one or more separator metal fittings. In particular, in this embodiment, the earthquake-resistant slit material is fixed to the separator metal fittings using a wire or other linear material, so that the earthquake-resistant slit material 3 can be fixed by multiple separator metal fittings. If reinforcing bars such as deformed reinforcing bars or anti-vibration bars are present at the position instead of the separator metal fittings 19, the wire rods may be screwed to the reinforcing bars. Furthermore, the earthquake-resistant slit material may be fixed by being held from either the vertical wall or the adjacent column 14 (or the adjacent vertical wall).

[0051] Anti-slip mechanisms 7 for preventing axial displacement of the reinforcing bar 10 can be provided at positions corresponding to both end grain walls 34 as both ends of the earthquake-resistant slit material 3 of the reinforcing bar 10, at positions where the wire 4 is wound, and at positions where the spacers 6 are attached. The anti-slip mechanisms 7 can be, for example, a member that fits onto the outer periphery of the reinforcing bar 10, or a member that expands the outer diameter of the reinforcing bar 10 and is fixed by welding, adhesive bonding, clamping with a clip, binding with annealed iron wire, or the like.

[0052] The earthquake-resistant slit member 3 may be configured such that a slit member section 30 made of a combination of insulating material and fire-resistant material is installed between a pair of retaining frames 32 arranged on both sides in the width direction. The slit member section 30 may be configured such that rock wool is sandwiched between polyethylene closed-cell foam fitted to both retaining frames 32. The retaining frames 32 may be integrally extruded from synthetic resin materials such as polyvinyl chloride, polypropylene, or polyethylene, or may be formed by die-casting, rolling, extrusion, drawing, or other processes using metal materials such as aluminum alloys or copper alloys. The earthquake-resistant slit member 3 may be configured to fit within the wall thickness of the corner edge 12 of the reinforced concrete building 1. The earthquake-resistant slit member 3 may have a thickness of 30 to 50 mm, a width of 80 to 250 mm, and a height of 2,025 mm.

[0053] Each retaining frame 32 can have hook-shaped ridges 33 that protrude in a key-like shape on both sides of the thickness of the slit material 30 and are provided along its length. The earthquake-resistant slit material 3 can be arranged at the edge 12 of the corner of the reinforced concrete building 1, facing the reinforcing bar 10, and in a vertical position.

[0054] In the embodiment shown in Figures 1 to 4, the earthquake-resistant slit member 3 is arranged vertically between the reinforcing bar 10 and the separator metal fittings, with a predetermined gap between them. The shear-stop mechanism 7 can have wires 4 wound around the reinforcing bar 10 at positions corresponding to the two end-grain walls 34 of the earthquake-resistant slit member 3 to prevent the wires from shifting axially along the vertical reinforcement bars 10a. The intermediate portions of the wires 4 can be engaged along the hook-shaped ridges 33 of the shear-surface walls 31 of the earthquake-resistant slit member 3 on the side opposite the vertical reinforcement bars 10a around which the wires 4 are wound, and can be stretched between the upper and lower end-grain walls 34. As shown in Figure 1, each wire 4 can be wound to form a roughly V-shape in plan view, or a roughly U-shape in side view as shown in the perspective view of Figure 2. Each hook-shaped ridge 33 can have an engagement piece 33a protruding from its leading edge to prevent the wire 4 from falling off. In particular, the earthquake-resistant slit material 3 may be provided with a hole (through hole) that penetrates through it in the length direction, and the wire 4 may be configured to pass through this hole. In this case, the earthquake-resistant slit material 3 is provided with a through hole for fixing it, and a sleeve or the like may be provided in the through hole. Furthermore, the through hole may be provided on both sides of the earthquake-resistant slit material 3 in the width direction, or in the center of the width direction.

[0055] In the embodiment shown in Fig. 3, both end connecting fittings 5 ​​are provided to position and fix the earthquake-resistant slit material 3 relative to the reinforcing bar 10 or the like. In this embodiment, these both end connecting fittings 5 ​​are formed as roughly T-shaped steel plates consisting of a base that fits along both end walls 34 of the earthquake-resistant slit material 3 and legs that protrude from the base, and the base is screw-connected 50 to the end walls 34, and mounting holes 51 are drilled in the ends of the legs. These legs can be connected and fixed to the reinforcing bar 10 or the like by welding or clipping, etc., to fix the position of the earthquake-resistant slit material 30. Note that the both end connecting fittings 5 ​​can be steel plates in other shapes besides the roughly T-shape, such as A-shape, E-shape, L-shape, V-shape, Y-shape, etc.

[0056] In the embodiment shown in FIG. 4 , the earthquake-resistant slit material 3 is held and fixed to the reinforcing bars 10 provided in each of a vertical wall 13 and an adjacent column (or adjacent vertical wall) 14 by wire materials such as wire 4 and the aforementioned double-end connecting metal fittings 5. Each reinforcing bar is a long steel material provided within the concrete structure, with its lower end extending upward from the surface of the concrete that has already been laid. In particular, in this embodiment, the reinforcing bars present in the adjacent column (or adjacent vertical wall) 14 are connected by wire materials such as wire 4, and the reinforcing bars present in the vertical wall 13 are connected by the aforementioned double-end connecting metal fittings 5. The wire materials and the double-end connecting metal fittings 5 ​​are held at both longitudinal ends of the earthquake-resistant slit material. As a result, even if lateral pressure acts on the earthquake-resistant slit material when filling it with hardened cement, the earthquake-resistant slit material can be reliably fixed in the intended position without movement or displacement.

[0057] Furthermore, in this embodiment, a slippage prevention mechanism 7 is provided on the rebar portion to which the double-end connecting fittings 5 ​​are fixed. In this embodiment, this slippage prevention mechanism 7 uses a member for expanding the outer diameter of the rebar, and can be embodied as a clip-shaped clip member that clamps the rebar 10, or as a ring-shaped member that is inserted from the upper end of the rebar. It is also preferable that the clip member or ring-shaped member that constitutes this slippage prevention mechanism 7 is fixed to the rebar 10 by welding, adhesive, or the like. 4, spacers 6 are placed at predetermined intervals in the height direction of the reinforcing bars 10 to ensure support of the earthquake-resistant slit member 3. These spacers are formed by advance / retract bolts 62 attached to the shear stop mechanism 7 and support plates 63 provided at the tips of the advance / retract bolts 62, and are configured so that the support plates 63 abut and support the shear surface wall 31 of the earthquake-resistant slit member 3. The advance / retract bolts 62 can function to adjust the advance / retraction of the support plates 63 relative to the shear stop mechanism 7.

[0058] As described above, cement paste 11 is poured into a formwork (not shown) in which earthquake-resistant slit structure 2 is provided, to form vertical wall 13 and adjacent column (or adjacent vertical wall) 14. An exterior wall paint layer 9 is provided on the exterior wall side of vertical wall 13 and adjacent column (or adjacent vertical wall) 14, and a seal 8 can be provided on the outside of retaining frame 32 on the exterior wall side of said earthquake-resistant slit material 3.

[0059] [Embodiment 2] Hereinafter, with reference to the drawings, a second embodiment of the earthquake-resistant slit 3 using a reinforced concrete structure 1 and its construction method will be specifically described. In particular, this embodiment is directed to constructing a new earthquake-resistant slit 3 in an internal corner 12 of an existing reinforced concrete building 1 that does not have an earthquake-resistant slit CS, or in an internal corner 12 that has a conventional earthquake-resistant slit CS. Below, as shown in Figures 5 to 16, the structure of the earthquake-resistant slit 3 using the reinforced concrete structure 1 of this invention will be explained in accordance with the construction method of the earthquake-resistant slit 3 shown in the flowchart of Figure 18.

[0060] The following describes the case where an earthquake-resistant slit 3 is constructed at the edge EG between the column 14 of the corner 12 and the corner wall SW. As shown in Figures 5(a) and (b), the columns 14 and corner walls SW of the target reinforced concrete building 1 are provided with interior walls IW on their indoor side IE, which are made of, for example, a urethane sprayed layer, a glass wool layer (air layer), gypsum board, vinyl cloth, etc.

[0061] As shown in Figures 5 and 18, a drilling range DR is set (c) in a rectangular area including the edge EG between the column 14 (beam 16 or slab 17) of the corner 12 of the reinforced concrete building 1 and the corner wall SW, or the width CSW of the conventional earthquake-resistant slit CS in the corner wall SW from this edge EG, a width DRW equivalent to the diameter of the drilling machine PF (for example, a horizontal width of 110 mm), and a distance H from a position below the beam 16 (or slab 17, thickness S) on the ceiling side by a radius PFR (for example, 50 mm) of the drilling machine PF to a position above the beam 16 (or slab 17, thickness S) on the floor side by a radius PFR (for example, 50 mm) of the drilling machine PF.

[0062] As shown in Figure 5, the drilling machine PF is used to bore an elongated cylindrical hole 100 and may include a rail RL temporarily fixed in a vertical position to the outdoor wall (outdoor end) OE of the entrance corner wall SW adjacent to the drilling range DR, a platform PD attached to the rail RL so as to be movable back and forth along the entrance corner 12, and the drilling machine PF (motor) mounted on the platform PD. The platform PD supports the drilling machine PF (motor) so as to be rotatable about an axis perpendicular to the rail RL and to be movable back and forth relative to the entrance corner wall SW, and the drive shaft of the drilling machine PF (motor) may be fitted with a rotary cutting tool such as a core drill (cutter) or a drill cutter having a core body equipped with a center drill whose outer diameter matches the width DRW of the drilling range DR (e.g., a horizontal width of 110 mm).

[0063] As shown in Figures 5, 6, and 18, a drilling target circle DTC is set for the interior corner wall SW, consisting of multiple inscribed circles with a diameter of 110 mm aligned between the upper and lower ends of the interior corner 12 within the drilling range DR. A series of horizontal cylindrical holes HCH (HCH) are drilled (d) along the interior corner 12 using the 110 mm rotary blade of the drilling machine, each extending from the outdoor end OE to the indoor end IE. As shown in Figures 7, 8, and 18, the center of the 110 mm rotary blade of the drilling machine PF is aligned with the junction of the upper and lower ends of the series of horizontal cylindrical holes HCH drilled along the interior corner 12 in Figure 6, and multiple more horizontal cylindrical holes HCH (HCH) are drilled (d) from the outdoor end OE to the indoor end IE. Existing rebar exposed in each horizontal cylindrical hole HCH is cut simultaneously with drilling. As shown in Figures 8 and 18, the multiple protrusions WP that form the wavy remainder on the column 14 side of each horizontal cylindrical hole HCH in the corner wall SW are polished together with the exposed rebars using a cup wheel or the like (not shown) to a flat finish, thereby forming an elongated cylindrical hole 100(d) that penetrates from the outdoor end OE of the corner wall SW to the indoor end IE.

[0064] As shown in Figures 9, 10, and 18, rectangular upper and lower edges 101 for new slit members 3 are recessed (e) using a cup wheel or similar at each edge EG of the oblong cylindrical hole 100 in the corner wall SW near the upper and lower ends of the oblong cylindrical hole 100 in the direction along the corner 12. The slit members 3a of the existing earthquake-resistant slits CS are removed before the upper and lower edges 101 are formed. A primer for rust prevention and waterproofing is applied (f) to the inner wall of the oblong cylindrical hole 100 and the exposed rebar.

[0065] 10, 11, 12, 13, and 18, pilot holes PH are bored (g) in a straight line and concentrically at the top and bottom ends of the corner wall SW, at positions slightly further away from the corner 12 than a position equivalent to 1 / 2 the width DRW of the elongated cylindrical hole 100 from the column 14, so as to ensure a cover thickness (e.g., 20 to 30 mm) from each edge 101 of the inner wall at the top and bottom ends in the direction along the corner 12 of the elongated cylindrical hole 100, and at positions separated by a cover thickness CT (e.g., 20 mm or more, 60 mm or more, or 70 mm) from the outdoor end OE of the corner wall SW toward the indoor end IE. Each pilot hole PH is for installing a reinforcing bar 10, described later, so as to span the corner 12.

[0066] As shown in Figures 11, 12, and 18, a partition wall body 110 is placed (h) at the indoor end (IE) of the elongated cylindrical hole 100. At this time, it is preferable to cut off the upper and lower ends of the partition wall body 110 to match the shape of the upper and lower inner walls of the elongated cylindrical hole 100. The partition wall body 110 may be, for example, a retaining frame 32 inside which an insulating board 30 is installed, such as a building insulating board made of a synthetic resin foam containing inorganic powder, such as Rockcell Board (registered trademark), or other building insulating board made of synthetic resin. The retaining frame 32 may be, for example, an integrally extruded piece made of a synthetic resin material such as polyvinyl chloride, polypropylene, or polyethylene, or a piece made of a metal material such as an aluminum alloy or copper alloy by die-casting, rolling, extrusion, drawing, or the like.

[0067] As shown in Figures 10 to 13 and 18, upper and lower anchor bolts 10d, which form part of the reinforcing bar 10, are driven (j) into the upper and lower pilot holes PH of the oblong cylindrical hole 100, respectively. Washers and nuts are screwed onto the upper and lower anchor bolts 10d, respectively. As shown in Figures 16 and 17, connecting fittings 5, which consist of roughly T-shaped steel flat plates and have mounting holes drilled at each end of the three branches, are installed between the upper and lower ends of the partition wall body 110 and the corresponding anchor bolts 10d. Each of the upper and lower anchor bolts 10d is inserted into a single mounting hole at one end of each of the upper and lower connecting fittings 5 ​​and secured with a nut. The other ends of each of the upper and lower connecting fittings 5 ​​can be connected (m) to the upper and lower ends of the partition wall body 110, respectively, by inserting connecting screws (not shown) into two mounting holes at each end.

[0068] 16 and 17 show an earthquake-resistant slit structure 2 according to another embodiment. The earthquake-resistant slit structure 2 according to this embodiment uses a rectangular plate-shaped partition wall 110 and is combined with complementary members 110a to close the upper and lower ends of the elongated cylindrical hole 100. In this embodiment, when the upper and lower connecting fittings 5 ​​are provided (m), for example, the upper and lower ends of the partition wall 110 can be left flat and the two can be joined by screwing or the like to the end grain surfaces. In this case, complementary members 110a made of the same or equivalent material as the insulating material 30, or a material that can be used as a partition wall, such as plywood, and shaped to fit the upper and lower gaps can be placed in the gaps formed between the upper and lower inner walls of the elongated cylindrical hole 100 and the upper and lower end grain surfaces of the partition wall 110.

[0069] As shown in Figure 14(a), the bifurcated wire 4 is wound around one of the anchor bolts 10d and engaged with a washer and nut. The bifurcated wire 4 is routed along the underside of the upper connecting fitting 5, detouring around the left and right sides of the partition wall surface 111 on the indoor side (IE) of the partition wall body 110, and routed along the upper side of the lower connecting fitting 5. The bifurcated wire 4 is then wound around the washer and nut of the lower anchor bolt 10d, tied, and tensioned to hold the partition wall body 110 in place from the indoor side (IE). The partition wall body 110 may also be provided with a hole extending through its length, through which the wire 4 passes. In this case, the partition wall body 110 has a through-hole for fixing, and a sleeve or the like may be provided in the through-hole. The through-hole may be provided on both sides of the width of the partition wall body 110, or in the center of the width. As shown in FIG. 12, the space between the holding frame 32 and the inner wall of the elongated cylindrical hole 100 is waterproofed (p) with a waterproof film WM made of a butyl rubber sheet BR and aluminum tape AT.

[0070] As shown in Figures 11, 13, 14(a) and 18, a new slit material 3 is fitted (q) between the upper and lower ends 101 of the oblong cylindrical hole 100 so that it is in contact with the pillar 14, and a sealant or the like is filled into the gap between the inner wall of the oblong cylindrical hole 100 and the slit material 3 to provide waterproofing.

[0071] A relay bolt 71 is spanned between upper and lower anchor bolts 10d and connected (r) by upper and lower connecting nuts 70. A spacer 6 can be provided at one or more locations on the relay bolt 71 or connecting nut 70. The spacer 6 can, for example, connect a horizontal nut 61 facing from the outdoor wall OE side of the partition body 110 toward the indoor wall IE side to the connecting nut 70, and the tip of the horizontal bolt 62 threaded onto the horizontal nut 61 abuts (s) against the partition surface 111 facing the outdoor wall OE side of the partition body 110, thereby preventing the partition body 110 from tipping toward the outdoor wall OE side. The relay bolt 71 can be made up of one or more connected bolts.

[0072] As shown in Figures 15(a), 15(b), and 9, grout CM as a cementitious hardened material is injected into the area surrounded by the slit material 3 and the partition wall 110, excluding the outdoor end of the slit material 3 of the oval cylindrical hole 100 (temporarily attached by masking or formwork, etc.). After hardening, the injected grout CM becomes integrated with the reinforcing bars 10 (anchor bolts 10d, relay bolts 71, spacers 6), upper and lower connecting fittings 5, and wire 4. The injected grout CM is tightly fitted to the multiple protrusions WP remaining on the inner wall (recessed corner wall SW) of the oval cylindrical hole 100, and after hardening, becomes firmly integrated with the recessed corner wall SW. A sealant is filled or applied to the shallow recess surrounded by the inner wall of the oval cylindrical hole 100 on the outdoor end of the slit material 3 and the grout CM (recessed after the temporary masking or formwork, etc. have been removed), and a sealing process 8 is performed (t).

[0073] As shown in Figures 15(a) and 15(b), the reinforced concrete structure 1 constructed using the above-described method includes, for example, upper and lower anchor bolts 10d, joint bolts 71, and connecting nuts 70 as at least one reinforcing bar 10. The structure also includes a partition wall 110 having partition walls 111 facing each other at a distance in the diameter direction of the anchor bolt 10d, joint bolt 71, and connecting nut 70 as the reinforcing bar 10. The partition wall 110 includes a wire 4 wound around the partition wall 110 and the upper and lower anchor bolts 10d as both ends of the reinforcing bar 10 to support the partition wall 110. The structure may also include grout CM as a cement-based hardened product that is provided in contact with the partition wall surface 111 of the partition wall 110 and integrally encapsulates the reinforcing bar 10 and the wire 4.

[0074] Furthermore, as shown in Figures 16 and 17, the reinforced concrete structure 1 of this invention can be configured such that upper and lower connecting fittings 5 ​​are bridged and connected between the reinforcing bar 10 and the upper and lower ends of the partition wall body 110, respectively.

[0075] Furthermore, as shown in Figures 13 and 14, a spacer 6 that is connected to the midpoint between the upper and lower ends of the reinforcing bar 10 and abuts against the partition surface 111 of the partition body 110 can be integrally included in the cement-based hardened material CM.

[0076] As shown in Figures 5, 8, 9, and 15(a) and (b), the earthquake-resistant slit 3 of this invention can be configured to include the boundary EG between the column 14 (beam 16 or slab 17) of the interior corner 12 of the reinforced concrete building 1 and the interior corner wall SW, or the width CSW of the conventional earthquake-resistant slit CS of the interior corner wall SW from that boundary EG, and have an elongated cylindrical hole 100 drilled from the outdoor end OE to the indoor end IE of the same interior corner wall SW within a drilling range DR set to a width DRW equivalent to (slightly exceeding) the diameter of the drilling machine FP and a length H obtained by subtracting a length equivalent to the radius PFR of the drilling machine PF from the upper and lower ends of the corner wall SW (for example, the beam 16 or slab 17 on the ceiling side, or the beam 16 or slab 17 on the floor side) in a direction (for example, the vertical direction) perpendicular to the direction of the width DRW (for example, the horizontal direction).

[0077] As shown in Figures 5, 10, 14, and 15, the elongated cylindrical hole 100 has upper and lower openings 101 recessed at the corners 12 near the upper and lower ends EG. It has the partition wall 110 disposed at the indoor end IE of the elongated cylindrical hole 100. It has the reinforcing bar 10 spanning between the upper and lower ends of the elongated cylindrical hole 100 near the outdoor side. It has the wire 4 wound around the partition wall 110 and the reinforcing bar to support the partition wall 110. It has a slit material 3 inserted between the upper and lower openings 101 of the elongated cylindrical hole 100 so as to contact the column 14. It has grout CM as a cement-based hardened material provided in the area surrounded by the slit material 3 and the partition wall 110, excluding the outdoor side of the slit material 3 of the elongated cylindrical hole 100. It may have a seal 8 provided on the outdoor side of the slit material 3. [Industrial Applicability]

[0078] The reinforced concrete structure of the present invention can be used to accurately integrate partition walls, slit materials for earthquake-resistant slits, or plates of similar shapes at the desired positions relative to the cement-based hardened structure. The earthquake-resistant slit of the present invention can also be used to provide new earthquake-resistant structures with superior earthquake resistance in corners of existing reinforced concrete buildings that already have earthquake-resistant slits, or in corners where no earthquake-resistant slits are installed. Furthermore, the earthquake-resistant slit construction method of the present invention can be used to more efficiently construct the earthquake-resistant slits of the present invention.

[0079] The reinforced concrete structure of the present invention can be used to accurately integrate earthquake-resistant slit materials, partition walls of similar shapes, or plates of similar shapes into the cement-based hardened material at the designed position.The earthquake-resistant slit structure of the present invention can also be used to arrange earthquake-resistant slit materials, partition walls of similar shapes, or plates of similar shapes in the designed position when pouring the cement-based hardened material, without using specially shaped formwork. [Explanation of symbols]

[0080] 1. Reinforced concrete buildings (reinforced concrete structures) 10. Reinforced concrete 10c Same threaded part 10d Same anchor bolt 11 Cement-based hardened material 12 Same as above. At the edge of the corner. 13 Horizontal end of vertical wall 14 Same adjacent column (adjacent vertical wall) 15 Vertical end of vertical wall 16 Same adjacent beam (floor end or ceiling end) 17 Slab 18 Same hoop muscle 19 Separator metal fittings S Thickness of slab 17 (or beam 16) 2 Earthquake-resistant slit structure 3 Earthquake-resistant slit material 30 Slit material part 31 Same shear wall 32 Same as above 33 Same hook-shaped convex stripe 33a Same engaging piece 34 Same as above End wall (both ends of earthquake-resistant slit material or slit material part) 4 wire 5. Connecting fittings on both ends 50 Same as above Screw connection part 51 Same mounting hole 6 spacers 62 Same advance / retract bolt 63 Same support plate 7 Anti-slip mechanism 8 Seals 9 Paint Layers Slab 17 SW same entrance corner wall EG Same Between the column 14 (beam 16 or slab 17) of the corner 12 and the corner wall SW OE Same Outdoor end of corner wall SW (outdoor side) IE Same Indoor end of corner wall SW (indoor side) IW Interior wall DR Drilling Range DRW: Width equivalent to the diameter of the drilling machine PF H Distance between both ends of drilling range DR CS Conventional earthquake-resistant slit CSW At the same time, the width of the conventional earthquake-resistant slit CS from EG PF drilling machine PFR Radius of drilling machine PF DTC drilling target circle HCH Horizontal cylindrical hole 100 oblong cylindrical hole WP same convex part 101 Small lot ED Same Fore-edge 101 vertical depth 110 Partition body 111 partition surface of the partition body 110 PH same pilot hole CT same covering thickness CM cement-based hardened material (grout) PF drilling machine RL same rail PD same mount WM waterproof membrane BR Butyl rubber sheet AT Aluminum Tape

Claims

1. At least one reinforcing bar arranged for a cement-based hardened material; a plate-shaped earthquake-resistant slit material facing the reinforcing bar at a distance; a wire wound around the earthquake-resistant slit material and the reinforcing bar to support the earthquake-resistant slit material; A cement-based hardened material that is provided so as to contact at least the surface of the earthquake-resistant slit material facing the reinforcing bar and that integrally contains the reinforcing bar and the wire; An earthquake-resistant slit structure comprising:

2. 2. The earthquake-resistant slit structure according to claim 1, wherein a spacer, which is connected to the reinforcing bar and abuts against the surface of the earthquake-resistant slit material facing the reinforcing bar, is integrally included in the cement-based hardened material.

3. A plate-like partition body to be installed on the bottom of a trench excavated at an earthquake-resistant slit material installation location including a corner of an already constructed building; An earthquake-resistant slit material attached to the excavated wall surface; At least one reinforcing bar provided in the excavated trench so as to extend along the extension direction of the trench; a wire wound around the partition wall body and the reinforcing bar to support the partition wall body; An earthquake-resistant slit structure characterized by comprising: a cement-based hardened material that is arranged to contact at least the surface of the earthquake-resistant slit material facing the reinforcing bar and that integrally encapsulates the reinforcing bar and wire.

4. A post-installation method for earthquake-resistant slit materials for earthquake-resistant slit material installation locations including corners of an already constructed building, an excavation step of excavating one wall surface at the recessed corner in a thickness direction along an extension direction of the recessed corner; an earthquake-resistant slit material installation process in which an earthquake-resistant slit material is installed along the other wall surface of the excavated trench; a partition wall installation process of installing a plate-shaped partition wall so as to close the bottom surface of the excavated trench; a reinforcing bar installation step of installing at least one reinforcing bar in the excavated trench so as to extend in the longitudinal direction of the trench; A post-installation method for earthquake-resistant slit materials, comprising a partition wall support process for supporting the partition wall by wrapping wire around the installed reinforcing bars and the partition wall.

5. A method for installing earthquake-resistant slit materials in a buried state in a building structure, comprising: an earthquake-resistant slit material installation process for installing an earthquake-resistant slit material having a component for locking or holding the wire at the buried location; An earthquake-resistant slit material installation method comprising: an earthquake-resistant slit material fixing step of fixing the earthquake-resistant slit material to a reinforcing steel frame within a building structure using a wire that is engaged with or held by the component part of the installed earthquake-resistant slit material.

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