JP5492656B2 - Seismic reinforcement structure separator and seismic reinforcement method - Google Patents

Description

  The present invention relates to a seismic reinforcing structure separator and a seismic reinforcing method for use in an existing structure such as a reinforced concrete building structure.

  Conventionally, as an earthquake-proof reinforcement structure for an existing structure such as a reinforced concrete building structure, for example, as in Patent Document 1, a large number of anchor bolts are implanted on the edge of an opening provided in a wall of the existing structure. A frame-shaped seismic reinforcement frame such as a steel brace with a large number of stud bolts planted on the outer peripheral surface is installed in the opening, and the seismic reinforcement frame and the edge of the opening The mold frame is arranged so as to close the gap between the two, and the opening edge surface side of both mold frames is held at a predetermined interval by the separator for the earthquake-proof reinforcement structure, and the earthquake-proof reinforcement frame and the opening edge surface There is known a configuration in which a solidified material such as mortar is filled and solidified so that anchor bolts and stud bolts are embedded in a solidified material filling region surrounded by both molds.

  The separator is made of a metal strip having a substantially arc-shaped cross section, and through holes are formed at a plurality of locations in the longitudinal direction. And the substantially U-shaped concave groove which inserts and fits a formwork is integrally formed in the both ends of a metal band board material by bending at a substantially right angle with the longitudinal direction of a metal band board material. .

JP 2006-257781 A

  However, since the separator needs to process the metal strip material into a substantially circular arc shape in order to ensure strength, the processing cost is high. Further, since the caking material is caused to wrap around through the through-hole, the caking material is difficult to circulate, and there is a possibility that an air pool is generated and the strength due to filling of the caking material is reduced. In addition, there is a possibility that the arc-shaped portion of the cross section of the metal band plate material will open and deform due to the injection pressure of the consolidation material, and if such deformation occurs, the concave grooves at both ends will also deform and the consolidation material will leak. The trouble which ends up also arises. In addition, for example, when a wooden frame is used as a mold frame and the wooden frame is removed, there is a problem that the concave groove portions at both ends remain and the appearance is inferior.

  The present invention is proposed in view of the above-mentioned problems, and is low-cost, prevents the occurrence of air pockets, reliably fills the consolidated material filling region with the consolidated material, and ensures the strength of the consolidated material filling. In addition to ensuring the strength of the separator, it is possible to reliably prevent the leakage of the binder, and furthermore, the part holding the formwork at both ends can be easily removed to enhance the aesthetics of the seismic reinforcement structure. An object of the present invention is to provide a seismic reinforcement structure separator and a seismic reinforcement method.

  The separator for seismic strengthening structure of the present invention includes a pair of U-shaped members having grooves into which a formwork is engaged, and a rod-shaped member that removably connects the pair of U-shaped members respectively provided on both ends. A concave portion recessed inwardly on each inner wall of the U-shaped member, and an end portion of the rod-shaped member penetrating the inner wall is disposed in the concave portion, and the fastening member disposed in the concave portion The end of the rod-shaped member and the U-shaped member are detachably fastened.

  According to this configuration, it is possible to process at low cost, and it is easy to circulate the consolidated material, prevents the occurrence of air accumulation, and ensures that the consolidated material filling area is filled with the consolidated material, and the strength by filling the consolidated material. Can be ensured. Further, the strength of the separator can be increased, and leakage of the consolidated material due to the deformation of the separator can be reliably prevented. Also, when removing and finishing the formwork and U-shaped member, the U-shaped member that holds the formwork at both ends can be easily and cleanly without requiring laborious work such as cutting with a tool. Removal can enhance the aesthetics of the surface finish of the seismic reinforcement structure. Further, the cost of parts can be reduced by reusing the removed fastening member and U-shaped member.

  The separator for seismic reinforcement structure according to the present invention is characterized in that a window portion capable of operating the fastening member in the recess is provided on each outer wall of the U-shaped member. The window part includes a through hole surrounded by the periphery or a notch in which a part of the periphery is missing.

  According to this configuration, the fastening member can be easily removed without using a special tool, and the U-shaped member can be removed by an easy operation.

  Further, the seismic reinforcement method for an existing structure according to the present invention includes a step of arranging a substantially frame-shaped seismic reinforcement frame in the opening of the existing structure, and an outer side of the peripheral edge of the seismic reinforcement frame. Disposing the mold so that the edge side engages with the seismic reinforcement structure separator of the present invention, and closing the gap between the seismic reinforcement frame and the edge of the opening with the mold; and A step of filling the solidified material into a solidified material filling region surrounded by the seismic reinforcing frame, the opening edge surface and the molds on both sides, and solidifying the solidified material; and the fastening member of the seismic reinforcing structural separator And a step of removing the pair of U-shaped members and a step of filling a finishing material in the removed traces of the U-shaped members.

  According to this structure, the removal of the U-shaped member can provide an anti-seismic reinforcing structure whose surface finish is excellent in aesthetics, and the aesthetics of the removed trace of the U-shaped member can be enhanced with a simple operation.

  In the seismic reinforcement structure separator of the present invention or the seismic reinforcement method for an existing structure, it can be processed at a low cost, and the consolidated material can be easily circulated to prevent the formation of air pockets. Can be reliably filled, and the strength by filling the binder can be ensured. Further, the strength of the separator can be increased, and leakage of the consolidated material due to the deformation of the separator can be reliably prevented. Also, when removing the formwork such as a wooden formwork and U-shaped member and finishing the removed trace of the U-shaped member by filling it with finishing material, or when applying finishing finish or applying no decorative board material to the surface, etc. In addition, the U-shaped member that holds the molds at both ends can be easily and cleanly removed without requiring labor-intensive operations such as cutting with a tool to enhance the aesthetics of the surface finish of the seismic reinforcement structure Can do. Further, the cost of parts can be reduced by reusing the removed fastening member and U-shaped member.

(A) is a front view of the earthquake-resistant reinforcement structure of the existing structure using the separator for earthquake-resistant reinforcement structure of embodiment by this invention, The figure (b) is BB sectional drawing in (a). AA expanded sectional drawing in Fig.1 (a). FIG. 3 is a partially exploded explanatory view of FIG. 2. (A) is a perspective view of the separator for seismic reinforcement structure of embodiment, (b) is the decomposition | disassembly explanatory drawing of the one part. (A) is the front view of the separator for seismic reinforcement structure of embodiment, (b) is the longitudinal cross-sectional view, (c) is the side view, (d) is the front view of a rod-shaped member. Explanatory drawing which shows an opening part in the construction procedure of the earthquake-proof reinforcement structure of the existing structure in embodiment. Explanatory drawing which shows the state which provided the anchor bolt in the opening part by the construction procedure of the earthquake-proof reinforcement structure of the existing structure in embodiment. Explanatory drawing which shows the state which has arrange | positioned the earthquake-proof reinforcement flame | frame in the opening part by the construction procedure of the earthquake-proof reinforcement structure of the existing structure in embodiment. Explanatory drawing which shows the state which provided the spiral streak in the construction procedure of the earthquake-proof reinforcement structure of the existing structure in embodiment. (A)-(d) is explanatory drawing which shows the construction procedure of the earthquake-proof reinforcement structure of the existing structure in embodiment. (A) And (b) is explanatory drawing which shows the construction procedure which removes a formwork and a U-shaped member. Explanatory perspective drawing which shows a part of seismic reinforcement structure in the state which removed the formwork and the U-shaped member.

[Separator for seismic reinforcement structure of embodiment, seismic reinforcement structure and seismic reinforcement method for existing structure]
The separator for seismic reinforcement structure of embodiment by this invention, the seismic reinforcement structure of an existing structure, and a seismic reinforcement construction method are demonstrated. FIG. 1 (a) is a front view of the seismic reinforcement structure of an existing structure using the separator for seismic reinforcement structure of the embodiment, FIG. 1 (b) is a sectional view taken along line BB in FIG. AA expanded sectional view in (a). FIG. 3 is an exploded view of a part of FIG.

  As shown in FIGS. 1 to 3, the seismic reinforcement structure for an existing structure in the present embodiment is provided on an edge surface of an opening 1 a formed in a housing 1 such as an outer wall of an existing structure such as a reinforced concrete structure. Anchor bolt 2, a substantially frame-like seismic reinforcement frame 4 such as a steel brace installed in the opening 1 a, a stud bolt 3 provided on the outer peripheral surface of the seismic reinforcement frame 4, and a peripheral portion of the seismic reinforcement frame 4 The molds 5a and 5b are arranged on the outer surfaces of both sides and block the gap between the seismic reinforcement frame 4 and the edge of the opening 1a, and the edges of the openings 1a of the molds 5a and 5b on both sides are predetermined. The anchor bolt 2 and the anchor bolt 2 are placed in the filler filling region S surrounded by the seismic reinforcement structure separator 6 held at the interval, the seismic reinforcement frame 4, the edge of the opening 1a, and the molds 5a and 5b on both sides. With stud bolt 3 Filled as embedded and a caking material g of such non-shrink mortar is solidified. In the figure, reference numeral 7 denotes a spiral line provided around the anchor bolt 2 and the stud bolt 3 in the gap between the seismic reinforcement frame 4 and the edge of the opening 1a. The spiral line 7 is provided as necessary.

  A large number of anchor bolts 2 are implanted on the edge surface so as to protrude from the edge surface of the opening 1a. A large number of stud bolts 3 are implanted on the outer peripheral surface so as to protrude from the outer peripheral surface of the seismic reinforcement frame 4.

  The seismic reinforcement frame 4 includes a substantially square frame body 4a and a plurality of reinforcement braces 4b attached to the inside thereof by welding or the like. The frame body 4a and the brace 4b are made of, for example, H-shaped steel shown in FIG. It is formed. When the frame body 4a is made of H-shaped steel, a part of the outer side piece on the work side such as a filling material filling work may be cut in advance at a factory or the like. In the example of FIG. The one which cut off one piece of the indoor side of the existing structure which often becomes the side is used. As a result, a large open portion with respect to the gap between the seismic reinforcement frame 4 and the edge surface of the opening 1a is ensured, and the filling operation of the consolidated material g and the loading operation of the spiral muscle 7 described later are performed easily and quickly. It becomes possible.

  The molds 5a and 5b are provided on the inner side and the outer side of the gap between the seismic reinforcement frame 4 and the edge surface of the opening 1a, respectively, and are wooden molds (wooden frames) in this example. In the example of FIG. 2, since it is the shape of the seismic reinforcement frame 4 assuming that the seismic reinforcement frame 4 is built from the outside of the building, the open portion with respect to the gap between the seismic reinforcement frame 4 and the edge surface of the opening 1a Is larger on the indoor side which is the work side, the indoor formwork 5a is formed wider than the outdoor formwork 5b.

  4 and 5, the separator 6 corresponds to the thickness of the molds 5a and 5b, and a pair of U-shaped members 61 each having a groove 611 into which the molds 5a and 5b are inserted and engaged. And a rod-shaped member 62 that removably connects a pair of U-shaped members 61 and 61 provided on both ends. The rod-like member 62 is preferably a substantially cylindrical round rod member having a diameter of 5 mm to 10 mm, and screw portions 621 and 621 are formed at both ends thereof, and grooves 611 are formed in the screw portions 621 and 621, respectively. A U-shaped member 61 is screwed so that the directions are aligned. The rod-shaped member 62 is not limited to a substantially cylindrical shape, and may be a substantially elliptical column shape, or a substantially polygonal column shape such as a triangular shape, a square shape, a hexagonal shape, etc.

  Each inner wall 612 of the U-shaped member 61 is provided with a recess 613 formed in a conical conical shape on the inside, and the bar-shaped member 62 is formed so as to penetrate the through hole 614 of the recess 613. The end portion is disposed through the inner wall 612, and the screw portion 621 at the end portion of the rod-shaped member 62 is disposed in the recessed portion 613 so as not to protrude into the groove 611. An inner nut 63 and an outer nut 64 corresponding to a fastening member housed in the recess 613 are screwed into the screw portion 621 so as to sandwich the bottom portion of the recess 613, and the U-shaped member 61 is The nuts 63 and 64 are detachably fastened to a predetermined position of a screw portion 621 that is an end portion of the rod-like member 62 by tightening the nuts 63 and 64. Further, each outer wall 615 of the U-shaped member 61 is provided with a window portion 616 capable of operating an outer nut 64 that is a fastening member in the recess 613. The window portion 616 can be a through-hole surrounded by the periphery or a notch in which a part of the periphery is missing, but is a through-hole in this example.

  The other ends and the centers of the molds 5 a and 5 b held at a predetermined interval by the separator 6 are gripped by a mold gripping member 8 disposed in contact with the outer peripheral surface of the seismic reinforcement frame 4. The formwork gripping member 8 of this example is a screw type. The hooking part 81 is hooked on the seismic reinforcement frame 4, and the formwork 5 a, 5 b is gripped from the outside by the screw-type gripping part 82.

  An injection port 9 for injecting and filling a consolidated material g such as mortar into the consolidated material filling region S as shown in FIG. A pre-injection port 9a is provided at the center in the vertical direction of the mold 5a located on both left and right sides, and a pre-injection port 9b is provided at the center in the left-right direction at the top of the mold 5a. Each of the injection ports 9 and the preliminary injection ports 9a and 9b is configured to inject the consolidated material g into the consolidated material filling region S by connecting an injection hose (not shown). The arrangement positions of the inlets 9a and 9b, the connection structure of the injection hose with respect thereto, and the like are appropriate.

  As shown in FIG. 1, air vent holes 11 are provided at the upper corners of the uppermost part of the mold 5 a, and an air exhaust hose (not shown) is inserted into the air vent hole 11 so that the inside of the consolidated material filling region S is inserted. When the caking material g is injected into the caulking material, air remaining in the caking material filling region S is discharged. The arrangement position of the air vent hole 11 and the connection structure of the air hose relative thereto are also appropriate. Moreover, it is good to provide the sealing members 13, such as mortar only for a seal | sticker, or an epoxy resin, at the corner | angular part of the outer surface of each mold 5a, 5b and the edge surface of the opening part 1a.

  Next, an example of a specific procedure when constructing the seismic reinforcement method will be described. First, as shown in FIG. 7, the edge surface of the opening 1a formed in the housing 1 such as the outer wall in an existing structure such as a reinforced concrete building structure to be seismically reinforced as shown in FIG. 6 is roughened with a pick or the like. Anchor bolts 2 are planted at a predetermined pitch in the circumferential direction of the opening 1a on the edge surface of the opening 1a. For example, after an insertion hole of the anchor bolt 2 is drilled in the edge surface of the opening 1a, an adhesive capsule or the like is inserted into the insertion hole, and the capsule is broken by the anchor bolt 2. At the same time, the anchor bolt 2 may be stirred and mixed to fix it while reacting.

  In addition, an anchor (not shown) for temporarily fixing the frame is provided on the edge surface of the opening 1a as necessary, and the edge surface of the opening 1a is cleaned by an appropriate means, and then the surface is removed. A primer for ensuring the adhesion strength with the seal member 13 and the quality of the consolidated material g filled between the seismic reinforcement frame 4 and the edge surface of the opening 1a may be applied with a sprayer or the like. .

  Next, the seismic reinforcement frame 4 is accommodated in the opening 1a as shown in FIG. The seismic reinforcement frame 4 is formed in advance in a predetermined shape in accordance with the size of the opening 1a at a factory or the like, and the stud bolt 3 is fixed to the outer peripheral surface of the earthquake resistance reinforcement frame 4 at a predetermined pitch by welding or the like. Further, the seismic reinforcement frame 4 is provided from the edge surface of the opening 1a so that the consolidation material filling region S of the consolidation material g can be sufficiently secured between the seismic reinforcement frame 4 and the edge surface of the opening 1a of the housing 1 to be seismically reinforced. Form a little smaller. In addition to the so-called K-type brace as shown in FIG. 8, the seismic reinforcement frame 4 is called a D-type brace or the like, and the lower part of the frame body 4 a so that an entrance / exit passage can be installed in the seismic reinforcement frame 4. There is also a so-called Mansard type in which a part of is cut out, and the present invention can be applied to any configuration.

  The seismic reinforcement frame 4 accommodated in the opening 1a is fixed to a predetermined position by welding or the like to an anchor (not shown) for temporarily fixing the frame. At that time, it is planted on the edge surface of the opening 1a. The anchor bolt 2 provided and the stud bolt 3 planted on the outer peripheral surface of the seismic reinforcement frame 4 are arranged so as to alternately engage with each other as shown in FIG. Then, as shown in FIG. 9 and FIG. 10 (a), the spiral reinforcement 7 and the like are arranged between the seismic reinforcement frame 4 and the edge surface of the opening 1a. The muscle 7 is preferably bound to the anchor bolt 2 and the stud bolt 3 with a wire or the like omitted in the drawing.

  Next, as shown in FIGS. 10B and 10C, a separator 6 is provided on the edge surface of the opening 1a in the gap between the seismic reinforcement frame 4 and the opening 1a, and is inserted into the groove 611 of the separator 6. The molds 5a and 5b are arranged so as to close the gap between the seismic reinforcement frame 4 and the edge surface of the opening 1a on the outer surfaces on both sides of the peripheral edge of the seismic reinforcement frame 4. The edge part of the edge part of the opening part 1a of the formwork 5a, 5b is hold | maintained at the predetermined space | interval by the separator 6, and is arrange | positioned and fixed to the edge face of the opening part 1a. When the molds 5a and 5b are inserted into the groove 611, the end of the rod-shaped member 62 and the nut 64 are disposed in the recess 613, so that they do not interfere with each other. The width of each mold 5a, 5b is formed to be slightly wider than the distance between the seismic reinforcement frame 4 and the edge of the opening 1a, and a part of each mold 5a, 5b is seismic reinforcement frame 4. It is desirable to configure to wrap.

  Next, as shown in FIG. 10C, the seismic reinforcement frame 4 side of each of the molds 5a and 5b arranged and fixed on the edge surface of the opening 1a while being held at a predetermined interval by the separator 6, It is wrapped with the outer surface of the seismic reinforcement frame 4 and fixed with the mold gripping member 8. The mold gripping member 8 hooks the hook portion 81 on the seismic reinforcement frame 4 and presses and grips the molds 5 a and 5 b from the outside with the screw-type gripping portion 82. In addition, it is desirable to install a plurality of mold holding members 8 in the longitudinal direction of the respective molds 5a and 5b, similarly to the separator 6.

  After that, as shown in FIG. 10 (d), the injection hose 10 is connected to the injection port 9, and after the extraction hose is installed at the upper corner of the opening 1a, the outer surface and the opening of each mold 5a, 5b. A sealing member 13 such as a seal-only mortar or an epoxy resin is provided at the corner with the edge surface of the portion 1a as necessary, and sealed. Then, a filling material g such as mortar is injected and filled from the injection hose 10 into the filling material filling region S closed by both mold frames 5a and 5b between the seismic reinforcement frame 4 and the edge surface of the opening 1a. The anchor bolt 2 and the stat bolt 3 are embedded in the consolidated material filling region S, and the consolidated material g is solidified. Further, the consolidated material g contacts the inner wall 612 of the U-shaped member 61 and the inner surface of the concave portion 613 which is a part of the U-shaped member 61, and substantially connects the rod-shaped member 62 that connects the U-shaped members 61 and 61. It is solidified so as to be buried over the entire length. In addition, when the consolidated material g is injected into the consolidated material filling region S, air remaining in the consolidated material filled region S is discharged from the above-described venting hose. Air accumulation and the like are prevented from occurring.

  When the consolidated material 9 is solidified until it reaches a predetermined strength, as shown in FIG. 11A, the screw of the gripping portion 82 is loosened and the hooking portion 81 is detached from the seismic reinforcement frame 4 to form the mold holding member. 8 is removed, and the molds 5a and 5b are removed from the engagement with the groove 611 and removed. Further, as shown in FIG. 11 (b), a tool is inserted from the window portion 616 of the U-shaped member 61, the screwing of the nut 64, which is a fastening member in the recess 613, is loosened and removed from the screw portion 621. Both the character-shaped member 61 and the screw portion 621 are removed, and the U-shaped members 61 and 61 at both ends are removed from the rod-shaped member 62.

  As shown in FIG. 12, the caulking material g from which the U-shaped member 61 has been removed has a dent that remains as the removed trace g1 of the U-shaped member 61, and the removed trace g1 has a finish such as mortar. Fill the material and finish the iron. Further, the removed U-shaped member 61 and the nut 64 can be reused. It is also possible to leave the removal trace g1 as it is without filling the removal trace g1 with a finishing material or laying a decorative board material on the surface.

  In the present embodiment, the separator 6 can be processed at low cost, and the consolidated material g can be easily circulated, and air can be prevented from being generated, and the consolidated material filling region S can be reliably filled with the consolidated material g. It is possible to ensure the strength by filling the binder. Further, the strength of the separator 6 can be increased, and the leakage of the consolidated material g due to the deformation of the separator 6 can be reliably prevented. Moreover, when removing and finishing the molds 5a and 5b and the U-shaped member 61, the U-shaped member 61 holding the molds 5a and 5b at both ends is subjected to work that requires labor such as cutting with a tool. It can be removed easily and neatly without the need to improve the surface finish of the seismic reinforcement structure. Moreover, it is also possible to reduce component cost by reusing the nut 64 and the U-shaped member 61 which are the removed fastening members.

  In addition, the window portion 616 can easily remove the nut 64 without using a special tool, and the U-shaped member 61 can be removed by an easy operation. Moreover, the beauty of the removal trace g1 of the U-shaped member 61 can be enhanced by a simple operation by filling the finishing material.

  In addition to the configurations of the inventions and embodiments, the invention disclosed in the present specification includes those specified by changing these partial configurations to other configurations disclosed in the present specification, or these configurations. To which other configurations disclosed in the present specification are added and specified, or those partial configurations deleted and specified to the extent that partial effects can be obtained are included. Moreover, in the said embodiment, although the earthquake-resistant reinforcement structure using the earthquake-resistant reinforcement frame 4 was taken as an example, the separator for earthquake-resistant reinforcement structure of this invention is applicable also to the earthquake-resistant reinforcement structure which does not use the earthquake-resistant reinforcement frame 4. FIG.

  The present invention can be used for seismic reinforcement of existing structures.

DESCRIPTION OF SYMBOLS 1 ... Housing 1a ... Opening 2 ... Anchor bolt 3 ... Stud bolt 4 ... Seismic reinforcement frame 4a ... Frame main body 4b ... Bracing 5a, 5b ... Formwork 6 ... Separator 61 ... U-shaped member 611 ... Groove 612 ... Inner wall 613 ... Recessed part 614 ... Through hole 615 ... Outer wall 616 ... Window part 62 ... Bar-shaped member 621 ... Screw part 63, 64 ... Nut 7 ... Spiral muscle 8 ... Formwork gripping member 81 ... Hooking part 82 ... Holding part 9 ... Injection port 9a ... Preliminary Injection port 9b ... Preliminary injection port 10 ... Injection hose 11 ... Air vent hole 13 ... Sealing member S ... Solidified material filling area g ... Solidified material g1 ... Trace of removal

Claims (3)

A pair of U-shaped members having grooves into which the formwork is engaged;
A rod-like member that removably connects the pair of U-shaped members provided on both ends,
Forming a recess recessed inside on each inner wall of the U-shaped member;
An end of the rod-shaped member that penetrates the inner wall is disposed in the recess,
A separator for an earthquake-proof reinforcement structure, wherein an end of the rod-shaped member and the U-shaped member are detachably fastened by a fastening member disposed in the recess.   The separator for an earthquake-proof reinforcement structure according to claim 1, wherein a window portion capable of operating the fastening member in the recess is provided on each outer wall of the U-shaped member. Placing a substantially frame-shaped seismic reinforcement frame in the opening of an existing structure;
A mold is arranged on both outer surfaces of the peripheral edge of the seismic reinforcement frame so that the edge side of the opening is engaged with the seismic reinforcement structural separator according to claim 1, and the seismic reinforcement frame and Closing the gap between the edge of the opening with the mold, and
Filling the solidified material in a solidified material filling region surrounded by the seismic reinforcement frame, the opening edge surface and the molds on both sides, and solidifying;
Removing the fastening member of the seismic reinforcing structural separator and removing the pair of U-shaped members;
Filling a finishing material into the removal trace of the U-shaped member;
A seismic reinforcement method for existing structures characterized by comprising:

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