JP5599092B2 - Reinforced concrete formwork structure - Google Patents

Description

  The present invention relates to a formwork structure for extending a horizontal beam-like or vertical column-like reinforcing concrete structure that reinforces an existing building in contact with the surface of the existing building.

  As one method for reinforcing an existing building, as described in Patent Document 1, a reinforcing belt-like iron plate is fixed to an anchor bolt driven into an existing building, as described in the patent document 1, etc. A reinforcing method has been proposed in which reinforcing beams and pillars are added along the surface of the existing building so as to be disposed at an appropriate interval from the surface of the existing building and include the reinforcing strip-shaped iron plate. . Specifically, in the formwork structure described in Patent Document 1, a U-shaped clamp is fitted and fixed to both sides of the reinforcing strip-shaped iron plate, and the inner end of the separator is screwed to the U-shaped clamp. The mold plate was supported on the outer end portion of the separator.

JP 2008-163697 A

  As described in Patent Document 1, in the conventional reinforcing concrete formwork structure, it is assumed that the reinforcing member attached to the outside of the existing building via an anchor bolt is a strip-shaped iron plate, Since the H-shaped steel as the reinforcing member did not assume the case where the flange portions on both sides thereof were disposed at right angles to the surface of the existing building, the reinforcing effect was higher than that of the strip-shaped iron plate. H-shaped steel could not be utilized.

The present invention proposes a reinforcing concrete formwork structure that can solve the conventional problems as described above, and the reinforcing concrete formwork structure according to the present invention according to claim 1 comprises: In order to facilitate understanding of the relationship with the examples described later, the reference numerals used in the description of the examples are shown in parentheses, and both sides of the surface (2a) of the existing building (2) are shown. The H-section steel (3) with the side flanges (6, 7) arranged at right angles is anchored by anchor bolts (9a-9c) at the center plate (8) between the flanges (6, 7) on both sides. For reinforcement, the form plate (4, 5), which is fixed to the existing building (2) and forms the concrete placement space containing the H-shaped steel (3), is connected to the H-shaped steel (3). It is a concrete formwork structure, and the sides (6a, 7a) on the existing building (2) side among the both sides (6a-7b) of both side flanges (6, 7) of the H-shaped steel (3) First, The shape clamp (16) is fitted and fixed with fastening bolts (25), and both sides of the H-shaped steel (3) are inserted into the screw holes (27) provided in the first U-shaped clamp (16). The inner end screw shaft portion (13a, 14a) of the first separator (13, 14) arranged parallel to the width direction of the flange portion (6, 7) outside the flange portion (6, 7) is screwed and connected. The first mold plate (4) parallel to the surface (2a) of the existing building (2) among the mold plates (4, 5) at the outer ends of the first separators (13, 14) In the concrete form structure for reinforcement formed by supporting
The anchor bolts (9a to 9c) pass through the central plate portion (8) of the H-shaped steel (3) and are fastened with nuts and protrude from the central plate portion (8) of the anchor bolts (9a to 9c). A separator connecting plate (17) is nut-fastened to the shaft portion (10), and a screw hole (31) provided in the separator connecting plate (17) is connected to a third parallel to the first separator (13, 14). The inner end screw shaft portion (15a) of the separator (15) is screwed and connected, and the first mold plate (4) is supported on the outer end portion of the third separator (15) .

  In carrying out the present invention, specifically, as described in claim 2, a second core is provided on each side (7a, 7b) of at least one flange portion (7) of the H-shaped steel (3). The clamp (20) is fitted and fixed with a fastening bolt (25), and the flange of the H-shaped steel (3) is inserted into the screw hole (24b) provided in the second U-shaped clamp (20). Screw the inner end screw shafts (18a, 19a) of the second separator (18, 19) placed perpendicular to the part (7) and parallel to the surface (2a) of the existing building (2) The flange portions (7, 7) are formed on the outer ends of the second separators (18, 19) outside the flange portion (7) of the H-shaped steel (3) in the mold plate (4, 5). ) Can be supported in parallel with the second mold plate (5).

In addition, as described in claim 3 , the first U-shaped clamp (16) and the second U-shaped clamp (20) have U-shaped side plates (22a, 22b) made of the H-shaped steel (3). A main body (23) integrally connected by a connecting plate portion (22c) parallel to the fitting direction to the flange portion side sides (6a to 7b), and a screw hole (24a) provided in the connecting plate portion (22c) The fastening bolt (25) that is screwed through, the screw hole portion (27) into which the inner end screw shaft portion (13a, 14a) of the first separator (13, 14) is screwed, Consists of a nut (26) fixed in a space surrounded by the U-shaped both side plate portions (22a, 22b) and the connecting plate portion (22c), the inner end screw shaft of the second separator (18, 19) The screw hole portion into which the portion (18a, 19a) is screwed can be constituted by a through screw hole (24b) provided in the connecting plate portion (22c).

According to the configuration of the present invention, in the case of using an H-shaped steel having a higher reinforcing effect instead of a strip-shaped iron plate as a reinforcing member for a reinforcing concrete structure to be added adjacent to the surface of an existing building, Of the form plates that form the concrete placement space containing the H-shaped steel, the first form plate in the direction parallel to the surface of the existing building is the first perpendicular to the first form plate. Building a high-strength reinforcing concrete structure that can be easily and firmly coupled to both side flanges of the H-shaped steel via a separator without relying on welding, and that includes the H-shaped steel. Can do. Furthermore, according to the structure of this invention, when the width | variety of the said concrete structure for reinforcement is wide and the height between the both-sides flange parts of the H-shape steel to be used becomes large (the width | variety of a center board part becomes wide), An intermediate position of the wide first formwork plate is also obtained by using an anchor bolt for fixing the H-shaped steel to an existing building and a third separator located between the first separator and parallel to the first separator. The H-shaped steel can be easily and firmly coupled without relying on welding, and a wide reinforcing concrete structure can be easily and easily built.

  In addition, according to the structure of Claim 2, the 2nd formwork plate at right angles with respect to the surface of the existing building among the formwork plates which form the concrete placement space containing the H-shaped steel, Through the second separator perpendicular to the second mold plate, it can be easily and firmly coupled to both sides of the H-shaped steel without relying on welding. Enclosed high-strength reinforcing concrete structures can be built.

When the reinforcing concrete form structure according to claim 2 is implemented, according to the configuration according to claim 3 , the first separator and the second separator having different directions are used by using one type of U-shaped clamp. Both of the two separators can be reliably coupled to the H-section steel, and the cost can be reduced as compared with a case where a dedicated U-shaped clamp is required.

It is a vertical side view which shows the formwork structure in the case of constructing a horizontal beam-like reinforcement concrete structure. It is a vertical side view of the U-shaped clamp main body to be used. It is a top view of the same clamp body. It is a vertical front view of the same clamp body. It is an expanded vertical side view which shows the connection part of the 1st separator of FIG. 1, and H-section steel. It is an expanded vertical side view which shows the connection part of the 3rd separator of FIG. 1, and H-section steel. It is a perspective view which shows the separator connection board used for the connection of a 3rd separator.

  In FIG. 1, reference numeral 1 denotes a formwork structure in the case of constructing a horizontal beam-shaped reinforcing concrete structure in contact with the surface 2 a of the existing building 2, which is arranged in parallel with the surface 2 a of the existing building 2. The H-shaped steel 3, the first mold plate 4 arranged in parallel with the surface 2 a of the existing building 2 outside the H-shaped steel 3, and the surface 2 a of the existing building 2 below the H-shaped steel 3 It is comprised by the 2nd mold plate 5 arrange | positioned at right angle.

  The H-shaped steel 3 is located at a position close to one flange portion 6 such that the central plate portion 8 located between the flange portions 6 and 7 on both sides is parallel to the surface 2a of the existing building 2, and the other flange portion. 7 and fixed at the existing building 2 by anchor bolts 9a to 9c at three locations, that is, a position close to 7 and a substantially central position in the width direction between the flange portions 6 and 7. A plurality of anchor bolts 9a to 9c are arranged at appropriate intervals with respect to the length direction of the H-section steel 3, and the inner end portions thereof are embedded and fixed to the existing building 2, respectively, A screw shaft portion 10 penetrating the central plate portion 8 of the H-section steel 3 is provided, and the H-shape steel 3 moves in a direction away from the existing building 2 on the screw shaft portions 10 of all anchor bolts 9a to 9c. The presser nut 11 is screwed and fastened, and the H-shaped steel 3 moves in the direction approaching the existing building 2 to the screw shaft portion 10 of the anchor bolts 9a to 9c at a selected appropriate position. A receiving nut 12 is screwed and fastened.

  The first mold plate 4 includes first separators 13 and 14 disposed on the outer sides of both side flange portions 6 and 7 of the H-shaped steel 3, and a first mold plate 4 disposed between the both side flange portions 6 and 7 of the H-shaped steel 3. The three separators 15 are connected and supported to the H-section steel 3. A plurality of the first separators 13 and 14 and the third separator 15 are arranged at appropriate intervals in the length direction of the H-section steel 3, and the first separators 13 and 14 are disposed on both sides of the H-section steel 3. Of the both sides 6a, 6b and 7a, 7b of the flanges 6, 7, both flanges 6, 6a, 7a are fitted and fixed to the sides 6a, 7a on the side close to the existing building 2. 7 and connected to the H-shaped steel 3 in a direction perpendicular to the first mold plate 4. The third separator 15 is an anchor located at a substantially central position in the width direction between the flange portions 6 and 7 of the H-shaped steel 3 among the anchor bolts 9 a to 9 c that attach the H-shaped steel 3 to the existing building 2. The separator connecting plate 17 attached to the bolt 9b is coupled to the H-section steel 3 in parallel with the first separators 13 and 14.

  The second mold plate 5 includes second separators 18 connected to both sides 7a and 7b of the flange portion 7 on the side close to the second mold plate 5 out of the both side flange portions 6 and 7 of the H-shaped steel 3. It is connected and supported by the H-section steel 3 through 19. A plurality of these second separators 18, 19 are arranged at appropriate intervals in the length direction of the H-section steel 3, and are fitted and fixed to both sides 7 a, 7 b of the flange portion 7 of the H-section steel 3, respectively. The second U-shaped clamp 20 is coupled to the H-shaped steel 3 in a direction perpendicular to the second mold plate 5 and parallel to the first mold plate 4.

  The mold plates 4 and 5 are supported by the H-shaped steel 3 by being joined to the outer ends of the separators 13 to 15, 18 and 19 by a conventionally known method. The frame structure 1 is configured together with a presser frame material (not shown) disposed on the outside of the frame, and in the illustrated example, the frame structure is for building a horizontal beam-like reinforcing concrete structure. The inner concrete placement space formed by the formwork structure 1 is open on the upper side, but when it is a formwork structure for constructing a vertical columnar reinforcing concrete structure, it is indicated by an imaginary line. Thus, the concrete casting space in which the second mold plate 5 is supported also on the flange 6 side of the H-shaped steel 3 via the second separators 18 and 19 and the second U-shaped clamp 20 and the entire periphery is closed. Is the existing building 2, the first mold plate 4 and the second mold plate It is formed by the. In FIG. 1, the first U-shaped clamp 16 that couples the first separator 14 on the flange portion 7 side of the H-shaped steel 3 to the side 7 a of the flange portion 7 includes the second separator 18 on the front side of the flange portion 7. The second U-shaped clamp 20 that is concealed by the second U-shaped clamp 20 that is coupled to the side edge 7a of the H-section steel 3 and that is coupled to the side 6a of the flange portion 6 of the H-section steel 3 is The first separator 13 in front is hidden by a first U-shaped clamp 16 that joins the side 6a of the flange portion 6 of the H-section steel 3.

  The first U-shaped clamp 16 that couples the first separators 13 and 14 to the H-shaped steel 3 and the second U-shaped clamp 20 that couples the second separators 18 and 19 to the H-shaped steel 3 have the same structure. Hereinafter, the structure will be described with reference to FIGS. 2 to 4. Each clamp 16, 20 has a U-shaped side plate portion 22 a, 22 b provided with a fitting recess 21, and a flange portion 6 of the H-shaped steel 3. 7 is connected and integrated by a connecting plate portion 22c parallel to the fitting direction with respect to the side sides 6a to 7b, and 2 are arranged in the length direction of the connecting plate portion 22c provided on the connecting plate portion 22c. Of the two through screw holes 24a and 24b, a fastening bolt 25 that threadably penetrates the through screw hole 24a on the fitting recess 21 side is formed. The inner end screw shafts of the first separators 13 and 14 are then secured by a hexagon nut 26 fixed to the end of the fitting recess 21 in the space surrounded by the U-shaped side plates 22a and 22b and the connecting plate 22c. A screw hole portion 27 is formed, and the first through screw hole 24b on the side away from the fitting recess 21 out of the two through screw holes 24a and 24b arranged in the length direction of the connecting plate portion 22c. A screw hole portion is formed in which the inner end screw shaft portions of the two separators 18 and 19 are screwed together.

  Although the hexagon nut 26 may be fixed by welding, in this embodiment, the corners at the symmetrical positions of the hexagon nut 26 are formed in the engagement holes 28a and 28b formed in the U-shaped side plates 22a and 22b. The hexagon nut 26 is fixed to a fixed position of the main body 23 in a state in which the hexagon nut 26 cannot rotate by bringing the hexagon nut 26 into contact with the inner surface of the connecting plate portion 22c.

  When the U-shaped clamp having the above-described configuration is used as the first U-shaped clamp 16, the fitting recesses 21 of the U-shaped side plates 22a and 22b are connected to the flanges 6 and 7 of the H-shaped steel 3 as shown in FIG. The fastening bolts 25 are screwed by being externally fitted to the side edges 6a, 7a, and the inner ends of the fastening bolts 25 are brought into pressure contact with the outer surfaces of the flange parts 6, 7, so that the side edges 6a, 7a is fixed at an arbitrary position in the length direction. Then, the inner end screw shaft portions 13 a and 14 a of the first separators 13 and 14 may be screwed into the screw hole portions 27 formed by the hexagon nut 26. At this time, the screwing depth of the first separators 13 and 14 can be adjusted within a range in which the inner end screw shaft portions 13 a and 14 a do not interfere with the fastening bolt 25.

  When the U-shaped clamp having the above configuration is used as the second U-shaped clamp 20, similarly, the fitting recesses 21 of the U-shaped side plates 22 a and 22 b are arranged on both sides of the flanges 6 and 7 of the H-shaped steel 3. The fastening bolts 25 are screwed by being externally fitted to the sides 6a to 7b, the inner ends of the fastening bolts 25 are brought into pressure contact with the outer surfaces of the flange portions 6 and 7, and the side edges 6a to 7b of the flange portions 6 and 7 are Fix at any position in the length direction. Then, the inner end screw shaft portions 18a, 19a of the second separators 18, 19 may be screwed into the through screw holes 24b. At this time, the second separators 18 and 19 do not interfere with the flange portions 6 and 7 of the H-section steel 3 fitted in the fitting recess 21 regardless of the screwing depth. The screwing depth of the second separators 18 and 19 can be adjusted within the range of the lengths of the portions 18a and 19a.

  As shown in FIG. 7, the separator connecting plate 17 for attaching the third separator 15 to the anchor bolt 9b has a plate material 29 of appropriate thickness provided with an anchor bolt insertion hole 30 and a through screw hole 31 for connecting the separator. As shown in FIG. 6, the anchor bolt is inserted between the two presser nuts 11 screwed in two stages to the screw shaft portion 10 of the anchor bolt 9 b protruding from the central plate portion 8 of the H-section steel 3. The separator connecting plate 17 fitted to the screw shaft portion 10 is clamped and fixed using the hole 30, and the inner end of the third separator 15 is inserted into the through screw hole 31 protruding laterally from the anchor bolt 9 b. The third separator 15 can be coupled to the H-section steel 3 via the anchor bolt 9b by screwing the screw shaft portion 15a.

  The formwork structure 1 shown in FIG. 1 assembled as described above has an H-section steel 3 arranged as a reinforcing member in a concrete placement space formed by formwork plates 4 and 5. Since the shape steel 3 is fixed to the existing building 2 via the anchor bolts 9a to 9c, the rebars are arranged around the H-shape steel 3 as necessary, and then the respective form plates 4, 5 The concrete is placed in the concrete placement space formed by the above, and a horizontal beam-like or vertical column-like reinforcing concrete structure containing the H-shaped steel 3 is built in contact with the surface 2a of the existing building 2. Can do.

  The reinforcing concrete form structure of the present invention can be used as means for constructing a reinforcing concrete structure in the form of a horizontal beam or a vertical column in contact with the surface of an existing building.

DESCRIPTION OF SYMBOLS 1 Formwork structure 2 Existing building 3 H-section steel 4 First formwork plate 5 Second formwork plate 6,7 H-section steel flange part 6a-7b Side of H-section steel flange part 8 H-section steel Center plate portion 9a to 9c Anchor bolt 10 Anchor bolt screw shaft portion 11 Presser nut 12 Receiving nut 13, 14 First separator 13a, 14a Inner end screw shaft portion of first separator 15 Third separator 15a Inner end of third separator Screw shaft portion 16 First U-shaped clamp 17 Separator connecting plate 18 Second separator 18a, 19a Inner end screw shaft portion of second separator 20 Second U-shaped clamp 21 Fitting recess 22a, 22b U-shaped both-side plate portion 22c Connecting plate Part 23 Body 24a, 24b Through screw hole 25 Fastening bolt 26 Hexagon nut 27 Screw hole part 28a, 28b Engagement hole 29 Plate material 30 An Boruto insertion hole 31 through the screw hole

Claims (3)

The H-shaped steel with the flanges on both sides perpendicular to the surface of the existing building is fixed to the existing building by anchor bolts at the center plate between the flanges. A reinforcing formwork structure in which a formwork plate forming a concrete placement space to be included is connected to the H-shaped steel, and is on the side of an existing building, on both sides of both side flange portions of the H-shaped steel. The first U-shaped clamps are fitted to the side edges of the first C-shaped clamps and fixed by fastening bolts, and the flanges are formed on the screw holes provided in the first U-shaped clamps on the outer sides of both side flange portions of the H-shaped steel. The inner end screw shafts of the first separators arranged parallel to the width direction of the parts are screwed and connected, and the outer ends of these first separators are connected to the outer surface of the existing building structure in the form plate. reinforcing co made by supporting an Formwork plate In cleat type frame structure,
The anchor bolt penetrates the central plate portion of the H-shaped steel and is nut-fastened, and a separator connecting plate is nut-fastened to the tip screw shaft protruding from the central plate portion of the anchor bolt, and is provided on the separator connecting plate. A reinforcing hole is formed by screwing and connecting the inner end screw shaft portion of the third separator parallel to the first separator to the screw hole portion, and supporting the first mold plate on the outer end portion of the third separator . Concrete formwork structure.   A second U-shaped clamp is fitted to both sides of at least one flange portion of the H-shaped steel and fixed by a fastening bolt, and the H-shaped steel is provided in a screw hole provided in the second U-shaped clamp. The inner end screw shaft portion of the second separator arranged at a right angle to the steel flange portion and parallel to the surface of the existing building is screwed and connected to the outer end portion of the second separator. The reinforcing formwork structure for reinforcement according to claim 1, wherein a second formwork plate positioned parallel to the flange portion is supported outside the flange portion of the H-shaped steel. The first U-shaped clamp and the second U-shaped clamp have a body formed by connecting and integrating U-shaped side plate portions with a connecting plate portion parallel to a fitting direction with respect to the flange side of the H-shaped steel, and the connection The fastening bolt that is screwed through the screw hole provided in the plate portion, and the screw hole portion into which the inner end screw shaft portion of the first separator is screwed includes the U-shaped side plate portion and the connecting plate. And a screw hole portion into which the inner end screw shaft portion of the second separator is screwed is formed by a through screw hole provided in the connecting plate portion. The reinforcing concrete form structure according to claim 2.

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