Seismic slit structure and reinforced concrete structure utilizing the same

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 seismic slit materials for enhancing the seismic resistance of reinforced concrete buildings, and relates to a seismic slit structure for accurately positioning the seismic slit material during the construction of reinforced concrete buildings, and a reinforced concrete structure using the same.

Background Art

[0002] In a conventional seismic slit structure, when concrete is placed in new construction, renovation work, etc., the seismic slit material installed in the formwork may bend or shift under the pressure of the injected cement paste and may not be arranged as designed, and may not perform its original function as a seismic slit structure.

[0003] As a technique for preventing the bending and displacement of the seismic slit material in such new construction, for example, in Patent Document 1 (Japanese Patent No. 5089141), a reinforcing fitting for reinforcing the seismic slit material by connecting the seismic slit material and a separator interposed between an outer formwork and an inner formwork into which concrete is placed, the reinforcing fitting having a stopper that engages with a holding frame that holds a side portion of a plate material of the seismic slit material, a clip that engages with the separator, and a connecting rod that connects the stopper and the clip, the stopper having an engaging portion that engages with the holding frame on one side portion of a base portion of the stopper and a connecting portion that connects to the connecting rod on the other side portion of the base portion, the clip being mounted on one end side of the connecting rod so that the mounting position can be adjusted and engaging with the separator, and the connecting rod having the other end portion connected to the connecting portion, showing a reinforcing fitting for a seismic slit material that enables a strong connection between the seismic slit material and the separator and can reduce the construction time (i.e., can reduce construction costs, etc.).

[0004] In addition, Patent Document 2 (Japanese Patent No. 6120194) discloses that the first and second formwork structures each have formworks arranged side by side and slit girders fixed between the formworks at the attachment positions of the seismic slit materials. The cross-sectional shape of the slit girders is a hexagonal shape in which a trapezoidal part and a square part are integrated. The square part is sandwiched and fixed between adjacent formworks, and a support member for the seismic slit material is fitted and attached to the trapezoidal part. An attachment structure for the seismic slit material and a construction method thereof are disclosed, which can firmly fix the seismic slit material to the first and second formwork structures to prevent it from falling off due to the pressure of concrete, significantly simplify the working process, and reliably finish the concrete surface.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, as in the reinforcing metal fitting for the seismic slit material shown in the aforementioned Patent Document 1, in order to withstand the pressure of concrete placement during construction, the seismic slit material and the separator interposed between the outer formwork and the inner formwork are firmly connected. This is effective for constructing the seismic slit material in a newly built building. However, for example, when the separator is not firmly fixed between the outer formwork and the inner formwork, it cannot withstand the pressure of concrete placement, and there is a concern that it will deviate from the designed position together with the seismic slit material.

[0007] Also, in the method of forming continuous holes in a wall body by drilling the wall body with a core bit rotated by a drilling machine, as shown in the aforementioned Patent Document 2 regarding the method of attaching a slit material, when drilling the continuous holes along the inner corner of a column, beam, or slab and the wall, in order to prevent the drilling machine from interfering with the column, beam, or slab, etc., it was necessary to drill at a position sufficiently spaced from the column, beam, or slab, etc. That is, originally, it would be most desirable to drill the seismic slit material in the wall along the edge of the column, beam, or slab, but it was difficult in terms of construction. This is because, in the post-construction work of the seismic slit, due to the structural convenience of the machines used in the process of cutting and removing the concrete structure (hereinafter referred to as the structure), such as cutting and machining, depending on the situation of the work site, the slit installation position had to be shifted unavoidably, but it was more desirable to enable installation at the original ideal positions such as along the edge of the column, beam, or slab like the sleeve wall.

[0008] In view of such circumstances, an object of the present invention is to provide a seismic slit structure that can use an existing formwork as it is and can be installed at a more economical and accurate position, a method for installing the slit material, and a reinforced concrete structure using the same.

[0009] Also, when the outer wall is widely excavated to install a slit material at the inner corner, after installing the slit material, it is necessary to close the excavated groove with cement paste or the like. At that time, it is necessary to install a partition body so that it functions as a formwork for the cement paste or the like injected into the groove and the bottom of the excavated groove does not collapse due to the injection pressure. Therefore, another object of the present invention is to provide a construction method capable of more accurately supporting the partition body that forms the bottom surface of the excavated groove and a reinforced concrete structure formed by the construction method.

[0010] Conventionally, when retrofitting a seismic slit at the corner of an existing reinforced concrete building, it was inevitable for the drilling machine to interfere with columns, beams, or slabs, so the construction had to be carried out at a slightly distant location. In view of such circumstances, an object of the present invention is also to provide a seismic slit material that can be constructed in an ideal arrangement and a construction method thereof for the columns, beams, or slabs at the corner of an existing reinforced concrete building and the corner wall.

[0011] The reinforcing bar is an object to which a wire is fastened in an object (for example, a reinforced concrete building) where the seismic slit structure of the present invention and the reinforced concrete structure using the same are provided. It functions as a reinforcing bar for reinforced concrete. In addition to deformed steel bars, bolts, bolts with nuts screwed thereon, bolts having anchor bolts at the ends and integrated by nuts, welding, etc. may be used, and washers, nuts, etc. may be screwed onto the fastening part of the wire. A tumor-like convex part may be provided by welding, an adhesive, etc. to prevent the wire from shifting in the axial direction of the reinforcing bar. Further, the reinforcing bar can be an object for attaching both-end connecting fittings, spacers, etc. described later in addition to the wire.

[0012] The seismic slit material is present between a wall and a column, beam, slab, etc., and buffers the stress applied by an earthquake. For example, it can be a seismic slit material in a vertical posture, a horizontal posture, or an inclined posture. That is, the seismic slit material can be installed at locations where seismic slit materials have been installed previously, such as in addition to corner walls, flower beds, inverted beams, staircase parts, etc. Such a seismic slit material can be one through which one or more anti-sway bars are penetrated. Also, the seismic slit material can be composed of a foamed plastic thermal insulation material such as polyethylene foam, polystyrene foam, urethane foam, phenolic foam, etc., a fibrous thermal insulation material such as rock wool, glass wool, cellulose fiber, insulation board, etc., or a combination thereof. Further, it can be one with a hard resin or metal holding frame on the exterior. It is desirable to provide a component for locking or holding a wire in such a seismic slit. For example, it can be formed as a hook, a hole, etc., or a hole portion (through hole) penetrating in its longitudinal direction can be formed. The seismic slit material can also be fixed by passing the wire through the through hole. At this time, a sleeve can also be provided in the hole to prevent deformation by the wire, ensure strength, or facilitate passing the wire.

[0013] The wire is wound around and fastened to reinforcing bars, hoop bars, or separator fittings of formwork panels, etc., arranged close to the seismic slit material so that the seismic slit material maintains its designed installation position against the pressure of the cement-based paste to be injected. This wire can be replaced with cord-like ropes, and can be a resin wire, a metal wire, a twisted wire thereof, etc., and further can be an iron wire, a stainless steel wire, etc. Particularly when installing the seismic slit material during the construction of a building (new construction), the wire can be used to fix the slit material at a predetermined position. For this purpose, the slit material and the reinforcing bars, hoop bars, or separator fittings of the formwork panel, etc. existing in the vicinity of its installation position are connected by a wire or other wire material to fix the slit material, so that it can be prevented from moving or deforming due to the lateral pressure during the filling of building inorganic filling materials such as concrete and mortar. Also, when installing the slit material by post-construction on an existing building, the wire can be connected to both of the holding frames provided over the entire length of the seismic slit material at each of the outdoor side ends of the seismic slit material. The wire wound around both holding frames can prevent the seismic slit material from rotating around an axis parallel to the reinforcing bars and rotating around an axis perpendicular to the reinforcing bars even when the pressure of the cement-based paste is unevenly applied to the shear plane wall of the seismic slit material. When the cement-based paste hardens and becomes a cement-based hardened body, the wire integrates with the cement-based hardened body and becomes a part of the reinforced concrete structure and the object (e.g., a reinforced concrete building) in which it is provided.

[0014] The cement-based hardened body encloses the reinforcing bars and the wire integrally and becomes a part of the reinforced concrete structure and the object (e.g., a reinforced concrete building) in which it is provided. The cement-based hardened body can be selected from, for example, cement, mortar, polymer cement, polymer mortar, grout, Portland cement, blended cement, special cement, etc., as well as putty materials, plaster materials, sealing materials, sealing agents, synthetic resins, adhesives, etc., or mixtures or combinations thereof.

[0015] In the present invention, there is provided a seismic slit structure including: reinforcing bars arranged for a cement-based hardened body; a seismic slit material disposed in the vicinity of the reinforcing bars and having shear plane walls on both sides in the thickness direction facing each other with a space in the diameter direction of the reinforcing bars; a wire wound around the seismic slit material and the reinforcing bars to support the seismic slit material; and a cement-based hardened body provided so as to be in contact with at least the shear plane walls on both sides of the seismic slit material and integrally enclosing each reinforcing bar and the wire.

[0016] When constructing (newly building) a building, the seismic slit material is connected and fixed to the reinforcing bars constituting a reinforced concrete structure via wires. When the pressure (lateral pressure) during the injection of the cement-based paste material during construction acts on the shear plane walls on both sides of the seismic slit material, the wires function to maintain the installation position of the seismic slit material against the pressure. When the cement-based paste hardens, the seismic slit material is accurately arranged and integrated as designed in the cement-based hardened body. However, the connection of the slit material to the reinforcing bars can also be achieved by fixing the wires to other members such as anti-sway bars. Such a seismic slit material can be installed by a seismic slit material installation method including: a seismic slit material installation step of installing the seismic slit material at an embedding location; and a seismic slit material fixing step of fixing the installed seismic slit material to a reinforcing bar framework in a building structure by wires.

[0017] Further, in the present invention, there is provided the above-described seismic slit structure in which both-end connecting fittings respectively bridged and connected between both ends in the length direction of the reinforcing bars and the seismic slit material are integrally enclosed in the cement-based hardened body.

[0018] The both-end connecting fitting supports the space between the reinforcing bar and the seismic slit material, and assists and strengthens the fastening by the wire wound around the reinforcing bar and the seismic slit material. The both-end connecting fitting can be made of a rigid material having sufficient strength to support the space between both ends of the reinforcing bar and the seismic slit material. The both-end connecting fitting can have, for example, two connecting parts coupled along the longitudinal end portions of the seismic slit material, and a mounting part coupled to the reinforcing bar. Each of the two connecting parts can be coupled to a corresponding holding frame. Thereby, rotation of the seismic slit material around an axis parallel to the reinforcing bar and rotation of the seismic slit material around an axis orthogonal to the reinforcing bar can be prevented. The connecting part can be, for example, a screw connecting part formed of a through hole, a connecting part by an adhesive, a fitting part to the holding frame, a welding part to the holding frame, etc. The mounting part to the reinforcing bar can be a mounting hole formed of a through hole, a welding part to the reinforcing bar, or a clip sandwiched between the reinforcing bars, etc. The both-end connecting fitting can be made of, for example, synthetic resin, metal, cement, etc., and can be made of reinforcing bar, metal plate, etc.

[0019] In the present invention, there is provided the seismic slit structure body in which a spacer coupled to an intermediate portion between both ends of the reinforcing bar and abutting against the shear plane wall of the seismic slit material is integrally encapsulated in the cementitious hardened body.

[0020] The spacer maintains the space between the intermediate portion between both ends of the reinforcing bar and the shear plane wall of the seismic slit material. The spacer supports the arrangement and posture of the seismic slit material until the injected cementitious paste hardens and after being integrated into the cementitious hardened body. The spacer can be fixed by being welded to the intermediate portion between both ends of the reinforcing bar, or by binding materials for reinforcement such as annealed iron wires, resin-made binding bands, etc., or pipe band fittings, etc. The spacer can be in the shape of a rod, a plate, or a block, etc.

[0021] In the present invention, a vertical bar or a formwork separator fitting arranged in the thickness dimension of the horizontal end of a vertical wall at the corner of a reinforced concrete building, vertical bars or hoop bars arranged in the thickness dimension of an adjacent column or an adjacent vertical wall facing the corner across the corner at the horizontal end of the vertical wall, a seismic slit material vertically arranged between the horizontal end of the vertical wall facing the corner and the adjacent column or the adjacent vertical wall, having two shear plane walls facing each other at intervals in the diameter direction of each vertical bar, both-end connecting fittings bridging and connecting between the upper and lower ends of the seismic slit material and at least one of the vertical bars, the formwork separator fitting, or the hoop bars to support the seismic slit material, a wire wound around the seismic slit material and at least the other vertical bar, the formwork separator fitting, or the hoop bar to support the seismic slit material, provided in contact with the shear plane wall of the seismic slit material, integrally enclosing the vertical bars, the both-end connecting fittings, and the wire, a cement-based hardened product forming the vertical wall at the corner and the adjacent column or the adjacent vertical wall facing the corner across the corner at the horizontal end of the vertical wall, and a seal provided on the outdoor side of the seismic slit material, and a reinforced concrete structure using the seismic slit structure are provided.

[0022] The seismic slit structure can accurately support a vertically positioned seismic slit material at a designed position against the injection pressure of a cement-based paste during construction. The seismic slit structure can have a vertically positioned seismic slit material.

[0023] Further, in the present invention, a method for post-constructing a seismic slit material at a corner in an existing building and a seismic slit structure with the seismic slit material installed are provided. That is, a method for post-installing a seismic slit material for a location where a seismic slit material is installed including a corner (including the location where a seismic slit material is installed on a parapet wall under a window, etc.), the method comprising: a digging step of digging one wall surface at the corner in the thickness direction along the extending direction of the corner; a seismic slit material installation step of installing a seismic slit material along the other wall surface of the dug groove; a partition body installation step of installing a plate-shaped partition body so as to close the bottom surface of the dug groove (the surface existing at the back of the groove); a reinforcing bar installation step of installing at least one reinforcing bar extending in the length direction of the groove (the direction in which the bottom surface of the groove extends) in the dug groove; and a partition body support step of winding a wire around the installed reinforcing bar and the partition body to support the partition body. A method for post-installing a seismic slit material is provided.

[0024] By such a construction method, a seismic slit structure body with a seismic slit material installed at a regular position can be obtained. That is, a plate-shaped partition body installed on the bottom surface of a groove dug at a location where a seismic slit material is installed including a corner (including the location where a seismic slit material is installed on a parapet wall under a window, etc.), a seismic slit material attached to the dug wall surface, at least one reinforcing bar provided in the dug groove so as to extend along the extending direction of the groove, a wire wound around the partition body and the reinforcing bar to support the partition body, and a cement-based hardened product provided so as to be in contact with at least the opposing surface of the reinforcing bar in the seismic slit material and integrally enclosing the reinforcing bar and the wire can be provided.

[0025] The partition body functions as a formwork for blocking the injected cement-based paste and is fastened to the reinforcing bar by a wire. Therefore, when receiving the pressure of the injected cement-based paste, the arrangement of the partition body is maintained, and the leakage of the cement-based paste beyond the partition body is prevented. When the cement-based paste hardens into a cement-based hardened product, it is integrated with the cement-based hardened product and becomes a part of a reinforced concrete structure body and an object (for example, a reinforced concrete building) where it is provided.

[0026] The partition body can be made of a rigid material so as to have sufficient strength as a formwork for cement and as a part of a reinforced concrete structure. It can be made to have at least one of heat insulation, fire resistance, sound insulation, and waterproofness in at least a part thereof. For example, it can be made of a foamed plastic-based heat insulating material such as polyethylene foam, polystyrene foam, urethane foam, or phenol foam, a fiber-based heat insulating material such as rock wool, glass wool, cellulose fiber, or insulation board, a resin plate, a cement plate, a metal plate, a metal plate-shaped pipe, or a combination thereof, etc. Further, it can be made to have a holding frame made of a rigid resin or metal externally mounted on any of them, etc. For example, the plate-shaped seismic slit material can also be used.

[0027] The partition body can be provided with engaging portions such as convex portions, hook-shaped portions, and concave groove portions where the wire is engaged at at least one location on the partition surface around which the wire is wound. Also, one or a plurality of tubular paths for the wire can be provided in a communicating state so that the wire can be inserted between both ends in the direction parallel to the reinforcing bar on the partition surface of the partition body. The holding frame can be provided with an engaging portion, a fitting portion that can be engaged with a connecting fitting, or a screw hole for screw-coupling the connecting fitting.

[0028] Also, in the present invention, a spacer that is coupled to a middle portion between both ends of the reinforcing bar and abuts against the partition surface of the partition body can be integrally encapsulated in the cement-based cured product. The spacer maintains the distance between the middle portion between both ends of the reinforcing bar and the partition surface of the partition body, and supports the arrangement and posture of the partition body from until the injected cement-based paste hardens and after being integrated into the cement-based cured product. The spacer can be fixed by being welded to the middle portion between both ends of the reinforcing bar, a binding material for reinforcement such as a annealed iron wire or binding bands made of resin, etc., or pipe band fittings, etc. The spacer can be in the shape of a rod, a plate, or a block, etc.

[0029] In the present invention, when it comes to the columns, beams or slabs at the corner of a reinforced concrete building and the corner wall, including the width of the conventional seismic slit of the corner wall from this point, a perforation range is set to a width equivalent to the diameter of the drilling machine, and a length obtained by excluding lengths equivalent to the radius of the drilling machine from both ends of the distance between both ends of the corner wall in the direction orthogonal to the width direction and along the corner. An oval cylindrical hole is drilled from the outdoor end to the indoor end of the corner wall within this perforation range. At each corner near both ends in the direction along the corner of the oval cylindrical hole, small recesses are provided. The partition body is arranged at the indoor end of the oval cylindrical hole. The reinforcing bars are spanned between both ends in the direction along the corner on the outdoor side of the oval cylindrical hole. The wire is wound around the partition body and the reinforcing bars to support the partition body. A slit material is inserted between the small recesses at both ends in the direction along the corner of the oval cylindrical hole so as to be in contact with the column, beam or slab. A cement-based hardened product integrated with the reinforcing bars and the wire is provided in the range surrounded by the slit material and the partition body, excluding the outdoor side of the slit material of the oval cylindrical hole. A seal is provided on the outdoor side of the slit material, thereby providing a construction method for the seismic slit.

[0030] When it comes to the columns, beams or slabs at the corner and the corner wall, including the width of the conventional seismic slit of the corner wall from this point, by drilling an oval cylindrical hole in a perforation range set to a width equivalent to the diameter of the drilling machine, it becomes possible to provide a slit material when there is an interface between the column, beam or slab and the corner wall. Regarding the arrangement of the partition body in the oval cylindrical hole and the arrangement of the slit material in the oval cylindrical hole, either may be arranged first, but it may be more efficient to arrange the partition body first and then the slit material in terms of operations such as winding the wire around the partition body and waterproofing treatment.

[0031] (Details Leading to Defects and Conversion of Ideas for Countermeasures) Regarding the post-construction slits for structures built according to the old standards, although a certain deviation from the originally intended installation position is allowed within the range permitted by structural calculations and experimental data, regarding the rectification items such as the bending of the slit material of the newly constructed slit under the new standards, it is considered that they should be corrected at the position indicated in the original drawing and with equivalent specifications from the viewpoints of the above-mentioned problems and protection of fixed assets.

[0032] At the stage of installing new slits during new construction, the slit materials are sandwiched from both sides of the formwork. There are various methods such as binding to the reinforcing bar part (which will become the groove for the final seal) and fixing with anti-sway devices to fix the joint bar (which will become the groove for the final seal) and the slit material itself. If the slit material becomes mossy, falls down, or moves, it will be difficult to correct after the completion of the building.

[0033] Therefore, it is necessary to carry out work to remove the bent slit material by damaging or shaving the building structure as much as possible with the interior material. Even if careful work is done to avoid damaging the heat insulation material such as sprayed urethane on the indoor side when removing the slit material, it is difficult to leave it properly. Moreover, in the case of construction from the outdoor side, the heat insulation material is provided at a width of about 30 mm at the innermost part on the indoor side, so it is extremely difficult to repair the heat insulation material such as urethane spraying. Therefore, we considered it from a reverse idea. We came up with the idea that by removing the things that will inevitably break anyway and installing structural parts that can perform better than before, and restoring the situation better than before, the problem can be solved, and thus the present invention was completed.

[0034] (Construction procedure) As a bit that can be brought close to the column (beam or slab) of the corner wall when entering, for example, use a bit with an outer diameter of 110 mmΦ to cut through the concrete and unnecessary members. Use a core drilling bit (either wet core or dry core construction is fine), stop once leaving a wall thickness of about 10 mm, and drill without injecting water while collecting the remaining concrete and heat insulation material (also serving as an accurate measurement of the wall thickness). At this time, regarding the hole drilled first, it seems that either the concrete and the heat insulation material can be penetrated or a little can be left, but in the subsequent process, a device is provided to block the hole so that no water or dust enters the interior.

[0035] Drill continuously in a wet, dry, or equivalent method according to the conditions of the construction location of the oval column hole, and after making a state where a plurality of holes are connected, drill at each contact point of adjacent holes so that the centers of the bits correspond, and use, for example, a countersink bit or cup wheel with an outer diameter of 30 mm to 100 mm to smooth the corrugated convex portions on the column side on the oval inner wall. The smoothing process of the corrugated convex portions can be left unconstructed and omitted if it is unnecessary in terms of cost and other aspects.

[0036] After finishing the drilling process of the oval column hole, clean the inside using a brush or the like, and further apply a rust inhibitor (JIS standard, F4 star product) to the cut rebar parts and exposed rebar parts. On the inner wall (inner corner wall) excluding the column (beam or slab) of the oval column hole, a plurality of anchor parts or the like integrated with a cement-based hardened material (for example, grout) to be filled and hardened later can be implanted (such as driven into a pre-bored hole) at predetermined intervals. The cement-based hardened material (for example, grout) injected and hardened in the oval column hole can be integrated with a plurality of anchor parts or the like implanted at predetermined intervals on the inner wall (inner corner wall) excluding the column (beam or slab) of the oval column hole.

[0037] After finishing shaving the vertical slit material installed during new construction, attach the new seismic slit material to the side of the column surface of the oval column hole. For this purpose, drive, for example, 3 / 8 anchors at appropriate positions at both ends in the direction along the inner corner of the inner wall of the oval column hole of the cut and completed structure, set all-thread, nuts, double washers, etc., pull the fixing wire with a new hard slit material (partition body) for new construction, which also serves as a substitute for the interior formwork, and fix it with special fasteners, surface fasteners, washers, nuts, etc. Thereby, the bottom surface (indoor side) of the oval column hole can be closed. Next, attach the seismic slit material to the column side.

[0038] Next, waterproof or waterstop materials are provided, such as by attaching butyl rubber sheets at all locations where waterstop is required between the new hard slit material (partition body) replacing the interior material formwork and the long cylindrical holes, and sealant materials are also used in combination to enhance the waterstop effect. As a result, even if a cement-based hardened material (e.g., grout) is placed in the long cylindrical holes, the moisture will not leak to the indoor side. Long nuts or the like are connected to all the upper and lower screws to prevent the cement-based hardened material injected in the subsequent process from falling off. In this process, various structures can be adopted, such as sheet attachment, pin driving, and prevention of the cement-based hardened material (e.g., grout) from falling off with wires.

[0039] A masking material is attached to the part corresponding to the outdoor end of the sealing material (the part that becomes the groove for the final seal), and after the placement of the cement-based hardened material (e.g., grout), the masking material is peeled off, and a sealing material as a seal can be applied to that part.

Advantages of the Invention

[0040] According to the seismic slit structure of the present invention, since a wire is wound around at least one reinforcing bar arranged for the cement-based hardened material and the seismic slit material, the seismic slit material is supported against the pressure of the placement of the cement-based paste. As a result, the seismic slit material can exhibit an excellent effect of being accurately integrated at the designed position in the cement-based hardened material.

[0041] In addition, the seismic slit material arranged between at least two opposing reinforcing bars, which is wound and supported by a wire between the two reinforcing bars, can be made to be more firmly supported. Additionally, with both ends provided with connecting fittings, spacers, etc., the installation posture of the seismic slit material can be supported more accurately.

[0042] In the reinforced concrete structure of the present invention, by using a seismic slit structure fixed with a wire or other wire material, the seismic slit material is firmly supported by the reinforcing bars for the cement-based hardened material, so that the vertically installed seismic slit material is accurately integrated at the designed position in the cement-based hardened material. Since the vertically or horizontally installed seismic slit material is accurately arranged at the designed position at the corner of the reinforced concrete building, a building with better seismic strength can be provided.

[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 included in the cement-based hardened material. Therefore, even when there is no support structure on the partition wall surface opposite to the partition wall surface receiving the injection pressure of the cement-based paste of the partition wall body, it is possible to exhibit an excellent effect of maintaining the designed arrangement against the injection pressure of the cement-based paste.

[0044] In addition, in the reinforced concrete structure in which upper and lower connecting fittings are bridged and connected between each of the reinforcing bars and both ends of the partition wall body, the partition wall body that may fall to the reinforcing bar side only by the tension of the wire is supported so as to firmly maintain the interval from the reinforcing bar, and the installation position of the partition wall body can be maintained more accurately.

[0045] In addition, in the reinforced concrete structure in which a spacer that is joined to the middle part between both ends of the reinforcing bar and abuts on the partition wall surface of the partition wall body is integrally included in the cement-based hardened material, it is possible to prevent deformation and displacement movement of the partition wall surface, and to more reliably prevent the cement-based hardened material from falling off together with the reinforcing bar.

[0046] According to the seismic slit using the reinforced concrete structure of the present invention, it is possible to provide a seismic slit installed at the corner column, beam or slab and the corner wall, which has been difficult to construct hitherto.

Brief Description of the Drawings

[0047]

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Mode for Carrying Out the Invention

[0048] 〔Embodiment 1〕 Hereinafter, with reference to the drawings, the seismic slit structure 2 according to the present embodiment and the reinforced concrete structure 1 using the same will be specifically described. In particular, the present embodiment shows the reinforced concrete structure 1 provided at the corner 12 of the reinforced concrete building 1. Hereinafter, as shown in FIGS. 1 to 4, the structure of the seismic slit structure 2 and the reinforced concrete structure 1 using the same will be shown according to the construction process.

[0049] As shown in FIGS. 1 to 4, the seismic slit structure 2 is installed along with the construction of the reinforced concrete building 1. When the reinforcing bars 10 as members for reinforced concrete are arranged, and a formwork (not shown) for molding the wall surfaces of the inner wall and the outer wall of the reinforced concrete building 1 is assembled, and the seismic slit material 3 is arranged, the seismic slit structure 2 is installed. The position where the seismic slit material 3 of the seismic slit structure 2 is installed can be, for example, the corner 12 between the horizontal end 13 of the vertical wall and the adjacent column 14 adjacent thereto.

[0050] In the embodiments shown in FIGS. 1 to 4, the seismic slit material 3 in a vertical posture is fixed by using a separator fitting 19 that firmly connects and fixes a formwork forming a vertical wall that becomes the corner 12 at the entrance corner of the reinforced concrete building 1, and a longitudinal bar 10 arranged in the thickness dimension of an adjacent column 14 (or an adjacent vertical wall) facing the corner 12 across the corner 12 at the horizontal end 13 of the vertical wall. The reinforcing bar 10 supporting the seismic slit material 3 may be a deformed bar 10 or a hoop bar provided around the deformed bar. Further, the separator fitting 19 existing on the side opposite to the reinforcing bar 10 may be one or two or more separator fittings. In particular, in the present embodiment, since the seismic slit material is fixed to the separator fitting using a wire or the like, the seismic slit material 3 can be fixed by a plurality of separator fittings. In addition, when there are reinforcing bars such as deformed bars or anti-sway bars at the position instead of the separator fitting 19, the wire may be screwed to the reinforcing bar. Furthermore, the fixing of the seismic slit material may be by holding from either one of the vertical wall or the adjacent column 14 (or the adjacent vertical wall).

[0051] At positions corresponding to both end mouth walls 34 as both ends of the seismic slit material 3 of the reinforcing bar 10, positions where the wire 4 is wound, positions where the spacer 6 is attached, etc., a displacement prevention mechanism 7 for preventing displacement movement in the axial direction of the reinforcing bar 10 can be provided. The displacement prevention mechanism 7 can be, for example, a member fitted to the outer periphery of the reinforcing bar 10 or a member that expands the outer diameter of the reinforcing bar 10, which is fixed by welding, adhesion, clamping by a clip, binding by a annealed wire, etc.

[0052] The seismic slit material 3 can be configured such that a slit material portion 30 composed of a combination of a heat insulating material and a fire resistant material is installed between a pair of holding frames 32 arranged on both sides in the width direction. The slit material portion 30 can be configured such that rock wool is sandwiched between polyethylene closed-cell foams fitted to both holding frames 32. The holding frame 32 can be integrally extrusion molded from a synthetic resin material such as vinyl chloride, polypropylene, polyethylene, etc., or formed from a metal material such as an aluminum alloy or a copper alloy by die casting, rolling, extrusion, drawing, etc. The seismic slit material 3 can be set to dimensions that can be accommodated within the thickness of 12 at the entrance corner of the reinforced concrete building 1. The seismic slit material 3 can be set, for example, to a thickness of 30 to 50 mm, a width of 80 to 250 mm, and a height of 2,025 mm.

[0053] Each holding frame 32 can be configured such that hook-shaped convex ridges 33 protruding in a key shape on both sides in the thickness direction of the slit material portion 30 project over its length direction. The seismic slit material 3 can be arranged opposite to the reinforcing bars 10 and in a vertical posture at the entrance corner 12 of the reinforced concrete building 1.

[0054] In the embodiments shown in FIGS. 1 to 4, the seismic slit material 3 is disposed in a vertical posture between the reinforcing bars 10 and the separator fittings with a predetermined interval therebetween. In the reinforcing bars 10, at positions corresponding to both end face walls 34 of the seismic slit material 3, the anti-displacement mechanism 7 can be configured such that the wire 4 is wound around the longitudinal bars 10a so as not to be displaced in the axial direction. The middle part of the wire 4 is engaged along each hook-shaped rib 33 of the shear plane wall 31 of the seismic slit material 3 on the side opposite to the longitudinal bar 10a around which the wire 4 is wound, and can be stretched between the upper and lower end face walls 34. As shown in FIG. 1, each wire 4 can be wound so as to form a substantially horizontally inverted V shape in plan view and a substantially U shape in side view as shown in the perspective view of FIG. 2. Each hook-shaped rib 33 can be provided, for example, with an engaging piece 33a protruding from its leading edge to prevent the wire 4 from falling off. In particular, the seismic slit material 3 may be provided with a hole (through hole) penetrating in its length direction, and the wire 4 may be configured to pass through this hole. In this case, the seismic slit material 3 is provided with a through hole for fixing it, and a sleeve or the like can be provided in the through hole. Further, the through hole can be provided not only on both sides in the width direction of the seismic slit material 3 but also at the center in the width direction.

[0055] In the embodiment shown in FIG. 3, both-end connecting fittings 5 for positioning and fixing the seismic slit material 3 to the reinforcing bars 10 or the like are provided. In this embodiment, the both-end connecting fittings 5 are formed as a substantially T-shaped steel plate composed of a base portion along both end face walls 34 of the seismic slit material 3 and a leg portion protruding from the base portion. The base portion is screwed 50 to the end face wall 34, and a mounting hole 51 is formed at the end of the leg portion. This leg portion can be connected and fixed to the reinforcing bars 10 or the like by welding, clip fastening, or the like, and the position of the seismic slit material 30 can be fixed. Note that the both-end connecting fittings 5 can be made of steel plates having other shapes such as an A shape, an E shape, an L shape, a V shape, and a Y shape in addition to the substantially T shape.

[0056] In the embodiment shown in FIG. 4, the seismic slit material 3 is held and fixed to the reinforcing bars 10 provided on each of the vertical wall 13 and the adjacent column (or adjacent vertical wall) 14 by a wire material such as a wire 4 or the both-end connecting fitting 5. Each reinforcing bar is a long steel material provided in the concrete structure, and the lower end side extends upward from the constructed concrete surface. Particularly in this embodiment, the reinforcing bars existing in the adjacent column (or adjacent vertical wall) 14 are connected by a wire material such as a wire 4, and the reinforcing bars existing in the vertical wall 13 are connected by the both-end connecting fitting 5. The holding of the wire material and the both-end connecting fitting 5 is performed at both ends in the length direction of the seismic slit material. As a result, even when the side pressure during the filling of the cement-based hardened material acts on the seismic slit material, it can be surely fixed at the planned position without causing movement or displacement.

[0057] Furthermore, in this embodiment, a displacement prevention mechanism 7 is provided at the reinforcing bar portion for fixing the both-end connecting fitting 5. Such a displacement prevention mechanism 7 uses a member for expanding the outer diameter of the reinforcing bar in this embodiment, and can be embodied as a clip member that clamps the reinforcing bar 10 in a clip shape, or as an annular member inserted from the upper end portion of the reinforcing bar. In addition, it is also desirable to fix the clip member or the annular member constituting the displacement prevention mechanism 7 to the reinforcing bar 10 by welding, adhesion, or the like. And in the embodiment shown in FIG. 4, spacers 6 are arranged at predetermined intervals in the height direction of the reinforcing bar 10 to ensure the support of the seismic slit material 3. Such a spacer is formed by a feed screw 62 attached to the displacement prevention mechanism 7 and a support plate 63 provided at the tip of the feed screw 62, and is configured such that the support plate 63 abuts and supports the shear section wall 31 of the seismic slit material 3. And the feed screw 62 can function to adjust the advancing and retreating degree of the support plate 63 with respect to the displacement prevention mechanism 7.

[0058] As described above, the cement-based paste 11 is placed in a formwork (not shown) provided with the seismic slit structure 2, and the vertical wall 13 and the adjacent column (or adjacent vertical wall) 14 are formed. An exterior wall coating layer 9 is provided on the outer wall side of the vertical wall 13 and the adjacent column (or adjacent vertical wall) 14, and a seal 8 can be provided outside the holding frame 32 on the outer wall side of the seismic slit material 3.

[0059] 〔Embodiment 2〕 Hereinafter, with reference to the drawings, the seismic slit 3 using the reinforced concrete structure 1 according to the second embodiment and its construction method will be specifically described. In particular, in this embodiment, a new seismic slit 3 is constructed for the corner 12 without the seismic slit CS of the existing reinforced concrete building 1 or the corner 12 with the conventional seismic slit CS. Hereinafter, as shown in FIGS. 5 to 16, the structure of the seismic slit 3 using the reinforced concrete structure 1 of the present invention will be described according to the construction method of the seismic slit 3 shown in the flowchart of FIG. 18.

[0060] Hereinafter, the case where the seismic slit 3 is constructed at the EG between the column 14 and the corner wall SW of the corner 12 will be shown. As shown in FIGS. 5(a) and (b), the column 14 and the corner wall SW of the target reinforced concrete building 1 are provided with an interior wall IW made of, for example, a urethane spray layer, a glass wool layer (air layer), a gypsum board, a vinyl cloth, etc. on the indoor side IE thereof.

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

[0062] As shown in FIG. 5, the drilling machine PF is for boring an elliptical column hole 100, and includes a rail RL temporarily fixed in a vertical posture to the outer wall (outdoor end) OE of the corner wall SW adjacent to the drilling range DR, a gantry PD attached to be movable forward and backward along the rail RL in the direction along the corner 12, and the drilling machine PF (motor) mounted on the gantry PD. The gantry PD is configured to support the drilling machine PF (motor) to be rotatable around an axis perpendicular to the rail RL and to be movable forward and backward with respect to the corner wall SW. The drive shaft of the drilling machine PF (motor) is equipped with a rotary cutting tool such as a drill cutter having a core body equipped with a core drill (cutter) or a center drill set to an outer diameter corresponding to the width DRW of the drilling range DR (for example, a horizontal width of 110 mm).

[0063] As shown in FIGS. 5, 6, and 18, for the corner wall SW, a perforation target circle DTC composed of a plurality of inscribed circles with a diameter of Φ110 mm arranged between the upper and lower ends in the direction along the corner 12 within the perforation range DR is set, and a plurality of horizontal cylindrical holes HCH connected in the direction along the corner 12 are perforated (d) from the outdoor end OE to the indoor end IE with a Φ110 mm rotary cutter of a drilling machine for each. As shown in FIGS. 7, 8, and 18, further, the center of the Φ110 mm rotary cutter of the drilling machine PF is made to correspond to the contact points at the upper and lower ends of the plurality of horizontal cylindrical holes HCH connected in the direction along the corner 12 drilled in FIG. 6, and a further plurality of horizontal cylindrical holes HCH are perforated (d) so as to penetrate from the outdoor end OE to the indoor end IE. Existing reinforcing bars exposed within each horizontal cylindrical hole HCH are cut simultaneously with the perforation. As shown in FIGS. 8 and 18, a plurality of convex portions WP, which are wavy remnants on the column 14 side of each horizontal cylindrical hole HCH of the corner wall SW, are polished to a flat surface together with the exposed reinforcing bars using a cup wheel or the like (not shown) to form an oblong hole 100 (d) penetrating from the outdoor end OE to the indoor end IE of the corner wall SW.

[0064] As shown in FIGS. 9, 10, and 18, at each of the corners 12 near the upper and lower ends in the direction along the corner 12 of the oblong hole 100 of the corner wall SW, rectangular upper and lower notches 101 with a lateral width CSW (for example, 30 mm) and a vertical depth ED (for example, 20 to 50 mm) for the newly provided slit material 3 are recessed (e) using a cup wheel or the like. By the stage of finishing the provision of the upper and lower notches 101, the slit material 3a of the existing seismic slit CS is removed. A primer for rust prevention and waterproofing is applied (f) to the inner wall of the oblong hole 100 and the exposed reinforcing bars.

[0065] As shown in FIGS. 10, 11, 12, 13 and 18, from each small opening 101 on the inner wall of the upper and lower ends in the direction along the entrance corner 12 of the long cylindrical hole 100, a covering thickness (for example, 20 mm to 30 mm) is secured. That is, it is a position slightly away from the entrance corner 12 from a position equivalent to 1 / 2 of the width DRW of the long cylindrical hole 100 from the column 14, and at the upper and lower ends of a position where the indoor end IE is separated from the outdoor end OE of the entrance corner wall SW by a covering thickness CT (for example, a thickness of 20 mm or more, 60 mm or more, or 70 mm), respectively, a pilot hole PH is bored (g) in a linear and concentric manner. Each pilot hole PH is for installing a reinforcing bar 10, which will be described later, so as to span in the direction along the entrance corner 12.

[0066] As shown in FIGS. 11, 12 and 18, a partition body 110 is arranged (h) at the indoor end (IE) of the long cylindrical hole 100. At this time, the upper and lower ends of the partition body 110 are preferably cut according to the shape of the upper and lower inner walls of the long cylindrical hole 100. The partition body 110 can be, for example, a heat insulation board for construction made of a synthetic resin foam containing an inorganic powder such as Rockwool (registered trademark) inside a holding frame 32, or a heat insulation board 30 such as other synthetic resin heat insulation boards for construction. The holding frame 32 can be, for example, integrally extrusion-molded from a synthetic resin material such as vinyl chloride, polypropylene, polyethylene, or made of a metal material such as an aluminum alloy or a copper alloy by die-casting, rolling, extrusion, drawing, etc.

[0067] As shown in FIGS. 10 to 13 and FIG. 18, upper and lower anchor bolts 10d that form part of the reinforcing bars 10 are respectively placed (j) in the upper and lower bottom holes PH of the oval column hole 100. Washers and nuts are screwed (k) onto the upper and lower anchor bolts 10d respectively. As shown in FIGS. 16 and 17, a connecting fitting 5 made of a generally T-shaped steel flat plate is bridged between the upper and lower ends of the partition body 110 and the corresponding anchor bolts 10d, and mounting holes are drilled in each of the three divided tips. One mounting hole at one end of each of the upper and lower connecting fittings 5 is inserted through the upper and lower anchor bolts 10d respectively and fixed with nuts. The other ends of the upper and lower connecting fittings 5 can be joined (m) to the upper and lower ends of the partition body 110 by inserting coupling screws (not shown) through the two mounting holes at the other ends.

[0068] FIGS. 16 and 17 show a seismic slit structure 2 according to another embodiment. The seismic slit structure 2 according to this embodiment uses a rectangular plate-shaped partition body 110 and combines a complementary body 110a to close the upper and lower ends of the oval column hole 100. In this embodiment, when providing the upper and lower connecting fittings 5 (m), for example, the upper and lower ends of the partition body 110 can be kept flat, and the two can be joined by screw connection or the like to the end face. At that time, in each of the gaps formed between the upper and lower inner walls of the oval column hole 100 and the upper and lower end faces of the partition body 110, a material made of the same material or an equivalent material as the heat insulating material 30, or a material that can be a partition such as plywood, and is formed into a shape that matches the upper and lower gaps. The complementary body 110a can be arranged.

[0069] As shown in Fig. 14(a), the bifurcated wire 4 is wound around the one anchor bolt 10d, engaged with a washer and a nut, and routed along the lower side of the upper connecting fitting 5 around the left and right sides of the partition surface 111 on the indoor side (IE) of the partition body 110, routed along the upper side of the lower connecting fitting 5, wound around and tied to the washer and nut of the lower anchor bolt 10d, and tensioned so that the partition body 110 is held (n) with tension from the indoor side. Further, the partition body 110 may be provided with a hole penetrating in its longitudinal direction, and the wire 4 may be configured to pass through this hole. In this case, the partition body 110 is provided with a through hole for fixing, and a sleeve or the like may be provided in the through hole. Further, the through hole may be provided on both sides in the width direction of the partition body 110, or may be provided at the center in the width direction. As shown in Fig. 12, waterproof treatment (p) is performed on the space between the holding frame 32 and the inner wall of the oval hole 100 with a waterproof film WM of butyl rubber sheet BR and aluminum tape AT.

[0070] As shown in Figs. 11, 13, 14(a) and 18, a new slit material 3 is fitted and mounted (q) between the upper and lower mouths 101 of the oval hole 100 in contact with the column 14, and a sealing agent or the like can be filled in the gap between the inner wall of the oval hole 100 and the slit material 3 for waterproof treatment.

[0071] A relay bolt 71 is spanned between the upper and lower anchor bolts 10d and connected (r) with upper and lower connecting nuts 70. A spacer 6 can be provided at one or a plurality of locations of the relay bolt 71 and the connecting nut 70. The spacer 6, for example, couples a horizontal nut 61 directed from the outdoor wall OE side to the indoor wall IE side of the partition body 110 to the connecting nut 70, and the tip of a horizontal bolt 62 screwed to the horizontal nut 61 abuts on (s) the partition surface 111 facing the outdoor wall OE side of the partition body 110, and can be configured to prevent the partition body 110 from falling to the outdoor wall OE side. The relay bolt 71 can be configured to have one or a plurality of bolts connected.

[0072] As shown in FIGS. 15(a), (b) and FIG. 9, grout CM as a cement-based hardened material is injected into the range surrounded by the slit material 3 and the partition wall body 110, excluding the outdoor end side of the slit material 3 of the long cylindrical hole 100 (by temporary attachment such as masking or formwork). The injected grout CM is integrated with the reinforcing bars 10 (anchor bolts 10d, relay bolts 71, spacers 6), the upper and lower connecting fittings 5, and the wire 4 after hardening. The injected grout CM is closely adhered in an engaging manner to a plurality of convex portions WP left on the inner wall (the inner corner wall SW) of the long cylindrical hole 100, and is firmly integrated with the inner corner wall SW after hardening. A sealant is filled or applied to the shallow recess (the recess formed by removing the masking or formwork of the temporary attachment) surrounded by the inner wall of the long cylindrical hole 100 on the outdoor end side of the slit material 3 and the grout CM, and a sealing 8 process is performed (t).

[0073] As shown in FIGS. 15(a) and (b), the reinforced concrete structure 1 constructed by the above construction method has, for example, upper and lower anchor bolts 10d, relay bolts 71, and connecting nuts 70 as at least one reinforced bar 10 arranged with reinforcement. It has a partition wall body 110 having partition surfaces 111 facing each other at intervals in the diameter direction of the anchor bolts 10d, relay bolts 71, and connecting nuts 70 as the reinforcing bar 10. It has a wire 4 wound around the upper and lower anchor bolts 10d at both ends of the partition wall body 110 and the reinforcing bar 10 to support the partition wall body 110. It can be provided with grout CM as a cement-based hardened material provided so as to be in contact with the partition surface 111 of the partition wall body 110 and integrally enclosing the reinforcing bar 10 and the wire 4.

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

[0075] Further, as shown in FIGS. 13 and 14, a spacer 6 that is coupled to an intermediate portion 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 encapsulated in the cementitious cured product CM.

[0076] As shown in FIGS. 5, 8, 9, and 15(a) and (b), the seismic slit 3 of this invention includes the column 14 (beam 16 or slab 17) at the corner 12 of the reinforced concrete building 1 and the corner wall SW at the corner EG, or from the corner EG to the width CSW of the conventional seismic slit CS of the corner wall SW. It has an oval column hole 100 drilled from the outdoor end OE to the indoor end IE of the same corner wall SW in a drilling range DR set to a width DRW equivalent to the diameter of the drilling machine FP (slightly exceeding the diameter) and a length H obtained by removing the length equivalent to the radius PFR of the drilling machine PF from the upper and lower ends (for example, the beam 16 or slab 17 on the ceiling side, the beam 16 or slab 17 on the floor side) of the corner wall SW in a direction orthogonal to the direction of the width DRW (for example, the horizontal direction) (for example, the vertical direction).

[0077] As shown in FIGS. 5, 10, 14, and 15, it has upper and lower small openings 101 recessed at the respective corners EG of the corner 12 near the upper and lower ends of the oval column hole 100. It has the partition body 110 arranged at the indoor end IE of the oval column hole 100. It has the reinforcing bar 10 spanned between the upper and lower ends near the outdoor side of the oval column hole 100. It has the wire 4 wound around the partition body 110 and the reinforcing bar to support the partition body 110. It has a slit material 3 inserted in contact with the column 14 between the upper and lower small openings 101 of the oval column hole 100. It has a grout CM as a cementitious cured product provided in a range surrounded by the slit material 3 and the partition body 110 except for the outdoor side of the slit material 3 in the oval column hole 100. It can 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 a partition body, a slit material for a seismic slit, or a plate body having a similar shape, etc. at a position positioned with respect to a cement-based hardened material. Further, the seismic slit of the present invention can be used to provide a new seismic structure with better seismic performance at either an inside corner having an existing seismic slit in an existing reinforced concrete building or an inside corner where no seismic slit is installed. Furthermore, the construction method of the seismic slit of the present invention can be used to more efficiently construct the seismic slit of the present invention.

[0079] Also, the reinforced concrete structure of the present invention can be used to accurately integrate a seismic slit material, a partition body having a similar shape, or a plate body having a similar shape, etc. at a position as designed with respect to a cement-based hardened material. Further, the seismic slit structure of the present invention can be used to dispose a seismic slit material, a partition body having a similar shape, or a plate body having a similar shape, etc. at a position as designed without using a formwork having a special shape when placing a cement-based hardened material.

Description of Reference Numerals

[0080] 1 Reinforced concrete building (reinforced concrete structure) 10 Same, reinforcing bar 10c Same, threaded portion 10d Same, anchor bolt 11 Same, cement-based hardened material 12 At the inside corner 13 Horizontal end of the vertical wall 14 Adjacent column (adjacent vertical wall) 15 Vertical end of the vertical wall 16 Adjacent beam (floor end or ceiling end) 17 Same, slab 18 Same, hoop bar 19 Same, separator fitting S Thickness of slab 17 (or beam 16) 2 Seismic slit structure 3 Seismic slit material 30 Same, slit material portion 31 Same cutting surface wall 32 Same retaining frame 33 Same hook-shaped rib portion 33a Same engaging piece 34 Same end wall (both ends of seismic slit material or slit material part) 4 Wire 5 Both-end connecting fitting 50 Same screw connection part 51 Same mounting hole 6 Spacer 62 Same retractable bolt 63 Same support plate 7 Displacement prevention mechanism 8 Seal 9 Coating layer Slab 17 SW Same inner corner wall EG Same column 14 (beam 16 or slab 17) of inner corner 12 and inner corner wall SW OE Same outdoor end (outdoor side) of inner corner wall SW IE Same indoor end (indoor side) of inner corner wall SW IW Same interior wall DR Drilling range DRW Width corresponding to the diameter of drilling machine PF H Distance between both ends of drilling range DR CS Conventional seismic slit CSW Width of conventional seismic slit CS from EG PF Drilling machine PFR Radius of drilling machine PF DTC Drilling target circle HCH Horizontal cylindrical hole 100 Oval cylindrical hole WP Same convex part 101 Small opening ED Vertical depth of small opening 101 110 Partition body 111 Partition surface of partition body 110 PH Same lower hole CT Same covering thickness CM Cement-based hardened product (grout) PF Drilling machine RL Same rail PD Same pedestal WM waterproof membrane BR same as butyl rubber sheet AT same as aluminum tape

Claims

1. At least one reinforcing bar arranged for a cement-based hardened product, Plate-shaped seismic slit materials facing each other with a space in the diameter direction of the reinforcing bar, A wire wound around the seismic slit material and the reinforcing bar to support the seismic slit material, A cement-based hardened product provided so as to be in contact with at least the opposing surface of the seismic slit material with respect to the reinforcing bar, and integrally encapsulating the reinforcing bar and the wire, A seismic slit structure characterized by comprising the above.

2. The seismic slit structure according to claim 1, wherein a spacer coupled to the reinforcing bar and abutting on the opposing surface of the seismic slit material with respect to the reinforcing bar is integrally encapsulated in the cement-based hardened product.

3. A plate-shaped partition body installed on the bottom surface of a groove excavated at a location where a seismic slit material is to be installed, including the entrance corner of a constructed building, A seismic slit material attached to the excavated wall surface, At least one reinforcing bar provided in the excavated groove so as to extend along the extending direction of the groove, A wire wound around the partition body and the reinforcing bar to support the partition body, A cement-based hardened product provided so as to be in contact with at least the opposing surface of the seismic slit material with respect to the reinforcing bar, and integrally encapsulating the reinforcing bar and the wire. A seismic slit structure characterized by comprising the above.

4. A method for post-constructing a seismic slit material for a location where a seismic slit material is to be installed, including the entrance corner of a constructed building, An excavation step of excavating one wall surface at the entrance corner in the thickness direction along the extending direction of the entrance corner, A seismic slit material installation step of installing a seismic slit material along the other wall surface of the excavated groove, A partition body installation step of installing a plate-shaped partition body so as to close the bottom surface of the excavated groove, A reinforcing bar installation step of installing at least one reinforcing bar extending in the length direction of the groove in the excavated groove, A method for post-constructing a seismic slit material, comprising a partition body support step of winding a wire around the installed reinforcing bar and the partition body to support the partition body.

5. A method for installing a seismic slit material in a building structure in an embedded state, A seismic slit material installation step of installing a seismic slit material at the installation location, A seismic slit material fixing step of fixing the installed seismic slit material to a reinforcing bar framework in the building structure by a wire. A method for installing a seismic slit material, comprising the above.

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