JP2018076651A - Reinforcing fitting for concrete bridge pier and reinforcing method for concrete bridge pier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To preferably reinforce a connection part where a vertically placed column part and a horizontally placed beam part in a concrete bridge pier are joined to each other.SOLUTION: In a reinforcing method, engaging members which engage a column engaging part stood from a connecting engagement part engaging with a connection position of a column part and a beam part with corner parts of the column part and engage a beam engaging part horizontally placed from the connecting engagement part with corner parts of the beam part, are arranged to respective connection positions of an upper right, an upper left, a lower left and a lower right of the of a connection part, the upper right and the upper left column engaging parts are connected with upper column fastening members so as to surround the column part to apply tension, and the lower right and the lower left column engaging parts are connected with lower column fastening members so as to surround the column part to apply tension, and an upper right, an upper left, a lower left and a lower right beam engaging parts are connected with beam fastening members so as to surround the beam part to apply tension.SELECTED DRAWING: Figure 3A

Description

  The present invention relates to a technique for reinforcing a concrete pier having a rigid frame structure in which a beam portion is provided laterally with respect to a column portion.

  Ramen piers are sometimes used as concrete piers for roads and railway viaducts, and the following reinforcement methods have been used to increase the strength and earthquake resistance of the concrete piers. For example, in Patent Document 1, two L-shaped or U-shaped reinforcing steel plates are wound (enclosed) on both sides of the pier outer peripheral surface from both sides, and both the reinforcing steel plates are welded. In between mortar is injected.

Patent No. 4005899

  The reinforcement construction method described in Patent Document 1 reinforces the column portion of the concrete pier, and does not sufficiently reinforce the connection portion between the column portion and the beam portion. Therefore, in order to further enhance the strength and seismic resistance of the concrete pier having the connecting portion, it is important to reinforce the connecting portion.

  The present invention has been made in view of the above-mentioned problems, and it is possible to satisfactorily reinforce a connecting portion in which a column portion standing up and down in a concrete pier and a beam portion extending horizontally from the column portion are connected to each other. An object of the present invention is to provide a concrete pier reinforcement device and a reinforcement construction method that can be performed.

  One aspect of the present invention is a concrete bridge pier reinforcement device that reinforces a connecting portion in which a column portion standing up and down in a vertical direction and a beam portion extending horizontally from the column portion are connected to each other. A first connection engagement portion that engages with a connection portion between the column portion and the beam portion on one side in the width direction of the beam portion and on the upper surface side of the beam portion, and a column that is erected from the first connection engagement portion A first column engaging portion that engages with a corner portion of the first portion, and a first beam engaging portion that is provided laterally from the first coupling engaging portion and engages with the corner portion of the beam portion. A joint member, a second connection engagement portion that engages with a connection portion between the column portion and the beam portion on the other side in the width direction of the beam portion and on the upper surface side of the beam portion, and standing from the second connection engagement portion A second column engaging portion that engages with the corner portion of the column portion, and a second beam engaging portion that is provided laterally from the second connection engaging portion and engages with the corner portion of the beam portion. The second engagement member and the beam A third connection engagement portion that engages with a connection portion between the column portion and the beam portion on the other side in the direction and on the lower surface side of the beam portion, and a corner portion of the column portion that is suspended from the third connection engagement portion A third engaging member having a third column engaging part that engages with the third beam engaging part, a third beam engaging part that is provided laterally from the third coupling engaging part and engages with a corner part of the beam part, A fourth connection engagement portion that engages with a connection portion between the column portion and the beam portion on one side in the width direction of the beam portion and on the lower surface side of the beam portion; A fourth engaging member having a fourth column engaging portion that engages with the corner portion, and a fourth beam engaging portion that is provided laterally from the fourth coupling engaging portion and engages with the corner portion of the beam portion. An upper column fastening member that connects and tensions the first column engaging portion and the second column engaging portion so as to surround the column portion, and a third column engaging portion and a fourth column so as to surround the column portion. Lower column tightening that connects and tightens the column engaging part And a beam fastening member for connecting and tensioning the first beam engaging portion, the second beam engaging portion, the third beam engaging portion, and the fourth beam engaging portion so as to surround the beam portion. It is characterized by that.

  In another aspect of the present invention, a concrete bridge pier reinforcing member for a concrete pier is provided with a connecting part in which a column part standing up and down in a vertical direction and a beam part horizontally provided from the pillar part are connected to each other. A method for reinforcing a concrete bridge pier that is reinforced by using a first engaging member, a second engaging member, a third engaging member, and a fourth engaging member engaged with a connecting portion, and an upper column fastening member To connect the first column engaging portion and the second column engaging portion so as to surround the column portion, and to connect the third column engaging portion and the fourth column engaging portion so as to surround the column portion by the lower column tightening member. The first beam engaging portion, the second beam engaging portion, the third beam engaging portion, and the fourth beam engaging portion are connected to each other so as to surround the beam portion by the beam tightening member. First step of temporarily mounting a concrete pier reinforcement device, upper column tightening member, lower column tightening portion And a second step of temporarily binding the main bars to the upper column tightening member, the lower column tightening member and the beam tightening member, and an upper column tightening member, After tensioning the lower column tightening member and the beam tightening member, a third step of binding the main bar to the upper column tightening member, the lower column tightening member and the beam tightening member, and a mold so as to surround the concrete bridge pier reinforcement and the main bar And a fourth step of placing concrete after installing the frame, and the first to fourth steps are executed in this order.

  In the present invention configured as described above, the upper column tightening member and the lower column tightening member provided so as to surround the column portion and the beam portion are surrounded with the four engaging members engaged with the connecting portion. Thus, a compressive stress is applied to the connecting portion. For this reason, the said connection part can be reinforced favorably.

It is a figure which shows an example of a bridge structure typically. It is a flowchart which shows the reinforcement construction method which reinforces a concrete pier using the concrete pier reinforcement apparatus concerning this invention. It is a figure which shows typically the construction of the reinforcement instrument which reinforces the connection part of a concrete bridge pier, and a reinforcement instrument. It is a figure which shows typically the construction of the reinforcement instrument which reinforces the pillar part of a concrete bridge pier, and a reinforcement instrument. It is a figure which shows typically the construction of the reinforcement instrument which reinforces the intermediate beam part of a concrete bridge pier, and a reinforcement instrument. It is a figure which shows typically a part of reinforcement method of a concrete pier. It is a figure which shows 2nd Embodiment of the reinforcement tool for concrete piers concerning this invention. It is a figure which shows 3rd Embodiment of the reinforcing instrument for concrete piers concerning this invention. It is a figure which shows 4th Embodiment of the reinforcement tool for concrete piers concerning this invention. It is a figure which shows 5th Embodiment of the concrete pier reinforcement equipment concerning this invention, and the concrete pier used as the application object of the said reinforcement equipment. It is a figure which shows 6th Embodiment of the reinforcing instrument for concrete piers concerning this invention. It is a figure which shows 7th Embodiment thru | or 10th Embodiment of the reinforcing implement for concrete piers concerning this invention.

  FIG. 1 is a diagram schematically showing an example of a bridge structure. This bridge structure is applied to an urban expressway or a railway viaduct 1. The viaduct 1 includes an upper structure 2 and a concrete pier 3 that supports vertical loads and horizontal loads acting from the upper structure 2. In FIG. 1, only the main girder 21 of the upper structure 2 is illustrated. In the figure and each figure described later, in order to clarify the positional relationship of each part of the bridge, the horizontal direction in which the main girder 21 extends is referred to as “front-rear direction”, and the horizontal direction orthogonal thereto is referred to as “left-right direction”. ”And the vertical direction is“ vertical direction ”.

  The concrete pier 3 is a so-called multi-layered ramen pier. As shown in FIG. 1, the two pillar portions 31, 31 provided corresponding to the main girder 21 and the top portions of the two pillar portions 31, 31 are provided. An upper beam portion 32 provided so as to be bridged, an intermediate beam portion 33 laterally provided at an intermediate portion between the two column portions 31 and 31, and a concrete footing 34 connected to the lower ends of the column portions 31 and 31. And a plurality of foundation piles (not shown) that support the footing 34. In addition, the foundation pile, the footing 34, and the lower end part of the column parts 31 and 31 are embed | buried under the ground surface GL.

  In the concrete pier 3 configured as described above, in order to increase the strength and earthquake resistance of the concrete pier 3, a connecting portion 35 (a portion marked with a dot in FIG. 1) in which the column portion 31 and the intermediate beam portion 33 are connected. ) Is important. Therefore, in the present embodiment, the connecting portion 35 of the concrete pier 3 is reinforced using a concrete pier reinforcing device described later, and the portion other than the connecting portion 35 is also reinforced using another reinforcing device. . Hereinafter, the reinforcing step of the concrete pier 3 will be described with reference to FIGS. 2, 3A, 3B, 3C, and 4. FIG.

  FIG. 2 is a flowchart showing a reinforcing method for reinforcing a concrete pier using the concrete pier reinforcement device according to the present invention. Moreover, FIG. 3A is a figure which shows typically the construction of the reinforcement instrument which reinforces the connection part of a concrete bridge pier, and a reinforcement instrument. Moreover, FIG. 3B is a figure which shows typically the construction of the reinforcement instrument which reinforces the pillar part of a concrete pier, and a reinforcement instrument. Moreover, FIG. 3C is a figure which shows typically the construction of the reinforcement instrument which reinforces the intermediate beam part of a concrete bridge pier, and a reinforcement instrument. Further, FIG. 4 is a schematic view showing a part of a concrete bridge pier reinforcement method. In addition, although the reinforcement in a part of the connection part 35 of the concrete pier 3, the column part 31 located in the periphery of the connection part 35, and a part of the intermediate beam part 33 will be described with reference to the above drawings, the other parts The same applies to.

  First, the ground surface GL is excavated to expose the lower end portion of the column portion 31 connected to the footing 34 in the concrete pier 3, that is, the footing connection portion (step S1). Then, the reinforcing devices 4, 5, and 6 are temporarily attached to the respective portions of the concrete pier 3, that is, the connecting portion 35, the column portion 31, and the intermediate beam portion 33 (step S2). The reinforcing instruments 4, 5, and 6 are instruments for reinforcing the connecting portion 35, the column portion 31 (excluding the region of the connecting portion 35) and the intermediate beam portion 33 (excluding the region of the connecting portion 35) of the concrete bridge pier 3, respectively. And a plurality of engagement members that can be engaged with the concrete pier 3 and a plurality of tightening members that connect and tension the plurality of engagement members engaged with the concrete pier 3 to each other. Yes. Hereinafter, the temporary mounting of the reinforcing device 4 to the connecting portion 35, the temporary mounting of the reinforcing device 5 to the pillar portion 31 excluding the connecting portion 35, and the temporary mounting of the reinforcing device 6 to the beam portion 33 excluding the connecting portion 35 are performed. Now, the configuration of the reinforcing device and the temporary mounting procedure will be described.

  As shown in FIG. 3A, the reinforcing instrument 4 includes four substantially L-shaped engaging members 41 to 44, two engaging members 45 and 46 extending in the vertical direction, and a vertical extension. It has two connecting members 47A and 47B and four types of tightening members 48A to 48D. The engaging members 41 to 44 basically have the same shape, and are different from each other only in the disposition position and disposition posture.

  The first engaging member 41 is connected to the column portion 31 and the intermediate beam portion 33 on one side (rear side) in the width direction (front-rear direction) of the intermediate beam portion 33 and on the upper surface side of the intermediate beam portion 33 ( A first coupling engagement portion 411 that engages with the first connection engagement portion 411, and a first column engagement portion 412 that is erected upward from the first connection engagement portion 411 and engages with a corner portion of the column portion 31. And a first beam engagement portion 413 that is provided laterally from the first connection engagement portion 411 and engages with a corner portion of the intermediate beam portion 33. The first column engaging portion 412 and the first beam engaging portion 413 have a cross shape in a sectional view as shown in FIG. 3A. In the first column engaging portion 412, the flange portion protruding in the forward direction and the flange portion protruding in the left direction are substantially orthogonal to each other, and can be engaged with the rear right corner of the column portion 31. A through hole for inserting a PC steel rod, which is one component of the upper column fastening member 48A, is provided in the flange portion protruding in the rearward direction and the flange portion protruding in the rearward direction. Further, in the first beam engaging portion 413, the flange portion protruding in the forward direction and the flange portion protruding in the downward direction are substantially orthogonal to each other, and can be engaged with the rear upper corner portion of the intermediate beam portion 33, while In the flange portion protruding in the direction and the flange portion protruding in the rear direction, a through hole for inserting a PC steel rod which is one component of the beam fastening member 48B is provided. The first engagement member 41 may be formed by welding, for example, four angle steels or may be formed by welding two shape steels having a cross-shaped cross section. The same applies to the second engagement member 42, the third engagement member 43, and the fourth engagement member 44 described below.

  The second engagement member 42 is a connecting portion C2 between the column portion 31 and the intermediate beam portion 33 on the other side (front side) in the width direction (front-rear direction) of the intermediate beam portion 33 and on the upper surface side of the intermediate beam portion 33 (see FIG. 1) and a second column engagement portion that is erected upward from the second connection engagement portion 421 and engages with the front upper corner portion of the column portion 31. 422, and a second beam engaging portion 423 that extends laterally from the second coupling engagement portion 421 and engages with the front upper corner portion of the intermediate beam portion 33. Further, the third engagement member 43 is connected to the column part 31 and the intermediate beam part 33 on the other side (front side) in the width direction (front-rear direction) of the intermediate beam part 33 and on the lower surface side of the intermediate beam part 33 ( A third coupling engaging portion 431 engaged with the third coupling engaging portion 431 and a third column engaging portion that is suspended downward from the third coupling engaging portion 431 and engages with the front lower corner portion of the column portion 31. 432, and a third beam engaging portion 433 that extends laterally from the third coupling engagement portion 431 and engages with the front lower corner portion of the intermediate beam portion 33. Further, the fourth engagement member 44 is a connecting portion between the column portion 31 and the intermediate beam portion 33 on one side (rear side) in the width direction (front-rear direction) of the intermediate beam portion 33 and on the lower surface side of the intermediate beam portion 33. A fourth coupling engaging portion 441 that engages with C4 (see FIG. 1), and a fourth column that hangs downward from the fourth coupling engaging portion 441 and engages with the rear lower corner portion of the column portion 31. It has an engaging portion 442 and a fourth beam engaging portion 443 that extends laterally from the fourth connecting engaging portion 441 and engages with the rear lower corner portion of the intermediate beam portion 33.

  The first engagement member 41 and the fourth engagement member 44 among the four engagement members 41 to 44 configured in this way are connected and integrated by a connection member 47A, and the second engagement member 42 and the third engaging member 43 are connected to each other by a connecting member 47B, and are thereby integrated. Further, the connecting members 47A and 47B are provided with through holes for inserting a PC steel rod as one component of the intermediate column tightening member 48D.

  The fifth engagement member 45 engages with the corner portion of the column portion 31 on the opposite side of the first column engagement portion 412 and the fourth column engagement portion 442 in the lateral direction (left-right direction) of the intermediate beam portion 33. The fifth column engaging portion 451 is provided. In the fifth column engaging portion 451, the flange portion protruding in the forward direction and the flange portion protruding in the right direction are substantially orthogonal to each other, and can be engaged with the rear left corner of the column portion 31, while the left direction A through hole for inserting a PC steel rod, which is one component of the column fastening members 48A, 48C, 48D, is provided in the flange portion protruding in the rearward direction and the flange portion protruding in the rearward direction. As the fifth engagement member 45, for example, two angle steels may be formed by welding, or one shape steel having a cross-shaped cross section may be formed. The same applies to the sixth engaging member 46 described below (engaging members 51 to 58 (FIG. 3B) and 61 to 64 (FIG. 3C) described later).

  The sixth engaging member 46 engages with the corner portion of the column portion 31 on the opposite side of the second column engaging portion 422 and the third column engaging portion 432 in the lateral direction (left-right direction) of the intermediate beam portion 33. A sixth column engaging portion 461 is provided. In the sixth column engaging portion 461, the flange portion protruding rearward and the flange portion protruding rightward are substantially orthogonal to each other and can be engaged with the front left corner of the column portion 31, while the left direction A through hole for inserting a PC steel rod, which is one component of the column fastening members 48A, 48C, 48D, is provided in the flange portion protruding in the forward direction and the flange portion protruding in the forward direction.

  In this embodiment, four types of tightening members 48A to 48D are used, but these are basically the same. That is, each of the tightening members 48A to 48D includes a straight PC steel rod passed between the engaging portions and nuts that are screwed to both ends of each PC steel rod. Therefore, as shown in the column (a) of FIG. 3A and FIG. 4, the fastening members 48 </ b> A to 48 </ b> D are set in the connecting portion 35 in a state where the engaging members 41 to 46 are engaged with the connecting portion 35. The reinforcing device 4 can be temporarily attached. That is, the PC steel rod of the upper column fastening member 48A is passed between the first column engaging portion 412, the second column engaging portion 422, the sixth column engaging portion 461, and the fifth column engaging portion 451, and each PC By attaching nuts to both ends of the steel rod, the upper column tightening member 48A surrounds and holds the upper column region of the connecting portion 35. Further, the PC steel rod of the beam fastening member 48B is passed between the first beam engaging portion 413, the second beam engaging portion 423, the third beam engaging portion 433, and the fourth beam engaging portion 443, and each PC steel. By attaching nuts to both ends of the rod, the left intermediate beam region of the connecting portion 35 is surrounded and held by the beam tightening member 48B. Further, the PC steel rod of the lower column tightening member 48C is passed between the fourth column engaging portion 442, the third column engaging portion 432, the sixth column engaging portion 461, and the fifth column engaging portion 451, and each PC By attaching nuts to both ends of the steel rod, the lower column tightening member 48C surrounds and holds the lower side column region of the connecting portion 35. In this way, temporary attachment of the reinforcing instrument 4 to the connecting portion 35 is completed. In addition, although the left connection part 35 was demonstrated here as shown to FIG. 3A, the same temporary attachment operation | work is performed also about the right connection part 35. FIG.

  As shown in FIG. 3B, the reinforcing instrument 5 includes eight engaging members 51 to 58 extending in the vertical direction and two types of tightening members 59A and 59B. The engaging members 51 to 58 have the same shape as the engaging members 45 and 46 described above. For this reason, about each part of the engaging members 51-58, an equivalent code | symbol is attached | subjected and description of a structure is abbreviate | omitted. The reinforcing instrument 5 uses two types of tightening members 59A and 59B, which are basically the same as the tightening members 48A to 48D of the reinforcing instrument 4. That is, the PC steel rods of the upper column fastening member 59A are engaged with the engagement members 51 to 54 in a state where the four engagement members 51 to 54 are respectively engaged with the corners of the column portion 31 on the upper side of the connecting portion 35. Between the column engaging portions 512 to 542 and by attaching nuts to both ends of each PC steel rod, the upper column tightening member 59A surrounds and holds the column portion 31 above the connecting portion 35. Further, the PC steel rods of the lower column tightening member 59B are engaged with the engagement members 55 to 58 in a state where the four engagement members 55 to 58 are engaged with the corners of the column portion 31 on the lower side of the connecting portion 35, respectively. Between the column engaging portions 552 to 582 and by attaching nuts to both ends of each PC steel rod, the lower column tightening member 59B surrounds and holds the column portion 31 below the connecting portion 35. In this way, the temporary mounting of the reinforcing instrument 5 to the column part 31 excluding the connecting part 35 is completed. In addition, although the left column part 31 was demonstrated here as shown to FIG. 3B, the same temporary mounting operation | work is performed also about the right column part 31. FIG.

  As shown in FIG. 3C, the reinforcing instrument 6 includes four engaging members 61 to 64 extending in the horizontal direction (left-right direction) of the beam portion 33, and a tightening member 65. The engaging members 61 to 64 have the same shape as the engaging members 45 and 46 described above. For this reason, about each part of the engaging members 61-64, an equivalent code | symbol is attached | subjected and description of a structure is abbreviate | omitted. The reinforcing device 6 uses one type of tightening member 65, which is basically the same as the tightening members 48A to 48D of the reinforcing device 4. That is, the PC steel rod of the tightening member 65 is engaged with the engagement member 61 in a state where the four engagement members 61 to 64 are respectively engaged with the corner portions of the intermediate beam portion 33 in a range sandwiched between the left and right connecting portions 35. Beams sandwiched between the right and left connecting portions 35 by the beam tightening member 65 in the intermediate beam portion 33 by passing between the beam engaging portions 613 to 643 of 61 to 64 and attaching nuts to both ends of each PC steel rod. Surround and hold the area. In this way, the temporary attachment of the reinforcing device 6 to the intermediate beam portion 33 excluding the connecting portion 35 is completed.

  When the temporary mounting of the reinforcing devices 4 to 6 is completed in this way, the main bar 7 is temporarily bound to the tightening members 48A to 48D, 59A, 59B, and 65 as shown in the column (b) of FIG. 4 (step S3). . Subsequently, the nuts of the tightening members 48A to 48D, 59A, 59B, 65 are tightened to tension the PC steel rod (step S4). Thereby, compressive stress is applied to the column part 31 from a direction orthogonal to the axial direction (vertical direction) of the column part 31, and compressive stress is applied from a direction orthogonal to the axial direction (horizontal direction) of the intermediate beam part 33. Furthermore, compressive stress is also applied to the column region and the beam region in the connecting portion 35 as well. As a result, the concrete pier 3 is reinforced well.

  Further, after the tension members 48A to 48D, 59A, 59B and 65 are tensioned, the main muscle 7 is finally firmly bound to the tension members 48A to 48D, 59A, 59B and 65 in the tension state (step S5). . Then, after the final binding of the main bars 7, as shown in the column (c) in FIG. 4, the mold 8 is installed so as to surround the concrete pier 3 (step S6), and the concrete on which the reinforcing tools 4 to 6 are mounted. Concrete is placed between the bridge pier 3 and the formwork 8 (step S7), and further concrete curing is performed (step S8). Thus, the reinforcement of the concrete pier 3 is completed. In the present embodiment, since the outer mold is used and the remaining mold is used as the mold 8, it is not necessary to remove the mold 8 from the reinforcing tools 4 to 6 and the concrete pier 3 reinforced with concrete. In addition, it is possible to ensure excellent aesthetics while reducing the reinforcement cost. Of course, the use of the makeup remaining mold is not an essential requirement of the present invention, and the mold 8 may be removed as usual to expose the concrete surface.

  As described above, in the present embodiment, the nuts of the tightening members 48 </ b> A to 48 </ b> D are tightened and tensioned in a state where the engaging members 41 to 46 are engaged with the connecting portion 35. That is, the PC steel rod of the upper column fastening member 48A is passed between the first column engaging portion 412, the second column engaging portion 422, the sixth column engaging portion 461, and the fifth column engaging portion 451, and each PC Nuts are attached to both ends of the steel bar and tightened to tighten the four column engaging portions 412, 422, 461, and 451 together with the PC steel bar. For this reason, compressive stress can be applied to the upper side column region of the connecting portion 35 from the direction orthogonal to the axial direction of the column portion 31. Further, the PC steel rod of the beam fastening member 48B is passed between the first beam engaging portion 413, the second beam engaging portion 423, the third beam engaging portion 433, and the fourth beam engaging portion 443, and each PC steel. Nuts are attached to both ends of the rod, and the four beam engaging portions 413, 423, 433, and 443 are tensioned together with the PC steel rod by tightening. For this reason, compressive stress can be applied to the intermediate beam region of the connecting portion 35 from a direction orthogonal to the axial direction of the intermediate beam portion 33. Further, the PC steel rod of the lower column tightening member 48C is passed between the fourth column engaging portion 442, the third column engaging portion 432, the sixth column engaging portion 461, and the fifth column engaging portion 451, and each PC Nuts are attached to both ends of the steel rod and tightened to tighten the four column engaging portions 442, 432, 461, and 451 together with the PC steel rod. For this reason, compressive stress can be applied to the lower side column region of the connecting portion 35 from the direction orthogonal to the axial direction of the column portion 31. Furthermore, the PC steel rod of the intermediate column tightening member 48D is passed between the rear side connecting member 47A, the fifth column engaging portion 451, the sixth column engaging portion 461 and the front side connecting member 47B, and is attached to both ends of each PC steel rod. The two column engaging portions 451 and 461 and the connecting members 47A and 47B are tensioned together with the PC steel rod by attaching and tightening the nuts. For this reason, compressive stress can be applied to the intermediate column region of the connecting portion 35 (region sandwiched between the upper column region and the lower column region) from a direction orthogonal to the axial direction of the column portion 31. Thus, since compressive stress is given with respect to each area | region of the connection part 35, the connection part 35 can be reinforced favorably. In addition to the connecting portion 35, the column portion 31 and the intermediate beam portion 33 are also reinforced favorably by applying compressive stress in the same manner as described above. Accordingly, the concrete pier 3 has excellent strength and earthquake resistance.

  In the above embodiment, the tension members 48A to 48D, 59A, 59B, 65 in tension state function as so-called hoop muscles, but the ends of both ends of the hoop muscles are bent and simply engaged with each other as in the past. Compared to the case, the column part 31 has a greater resistance to buckling. Furthermore, since the main reinforcement 7 is bound to the tension members 48A to 48D, 59A, 59B, 65 in a tension state, the main reinforcement 7 can be surrounded with excellent shear strength, and the strength of the concrete pier 3 after reinforcement can be increased. Can be increased.

  Thus, in this embodiment, the reinforcing device 4 corresponds to an example of the “reinforcing device for concrete pier” of the present invention. Further, the intermediate beam portion 33 corresponds to an example of the “beam portion” of the present invention. Further, the connecting members 47A and 47B correspond to examples of the “one side connecting member” and the “other side connecting member” of the present invention, respectively. Steps S2 and S3 correspond to an example of the “first process” and “second process” of the present invention, respectively, steps S4 and S5 correspond to an example of the “third process” of the present invention, and step S6, S7 corresponds to an example of the “fourth step” of the present invention.

  The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention. For example, in the embodiment described above, for example, as shown in FIG. 3A, the column engaging portion 422 of the engaging member 42 and the end of the beam engaging portion 423 are not specially processed. In addition, the flange portions may be connected to each other by the connecting piece 91 at each end portion, whereby deformation of the flange portion can be effectively prevented. In addition, welding etc. can be used for the connection of the connection piece 91 to the edge part of the column engaging part 422 and the beam engaging part 423. FIG. Further, the connecting piece 91 may be formed when the engaging member 42 is manufactured. Further, in a middle portion between the column engaging portion 422 and the beam engaging portion 423, a substantially triangular reinforcing rib 92 (see the dotted line in FIG. 5) is welded or the like while avoiding a through hole for inserting a PC steel rod. It may be attached, whereby the deformation of the flange portion can be more effectively prevented. In addition, although the engaging member 42 was demonstrated here, it cannot be overemphasized that the same reinforcement may be given also to the other engaging members 41, 43, 44-46, 51-58, 61-64. .

  Further, when the connecting piece 91 is attached to the engaging members 42 and 52, for example, as shown in FIG. 6, each connecting piece 91 is provided with a through hole 93 and the end portions of the connecting pieces 91 are in contact with each other. The engaging members 42 and 52 may be connected to each other by inserting the bolt 94 and fastening with the nut 95. Of course, such a coupling combination is not limited to the engagement member pair 42, 52, but other combinations, that is, the engagement member pair 41, 51, the engagement member pair 43, 56, the engagement member pair 44, 55, the engagement member pair 45, 54 (58) and the engagement member pair 46, 53 (57), and the reinforcing instruments 4, 5 can be integrated with each other to increase the reinforcement strength. Can do. Such reinforcement can also be applied to the reinforcing instruments 4 and 6. Further, the present invention may be applied to the column engaging portions 412, 422, 432, 442,... And the beam engaging members 413, 423, 433, 443,.

  Further, for example, as shown in FIG. 7, a deformable sheet 96 such as rubber or resin may be inserted between the column portion 31 and the engaging members 41 to 46 and 51 to 58. Both can be brought into close contact with each other, so that compressive stress due to tension of the fastening members 48A, 48C, 48D, 59A, 59B can be applied to the column portion 31. Further, a deformable sheet 96 such as rubber or resin may be inserted between the beam portion 33 and the engaging members 41 to 44 and 61 to 64, and the same effect as described above can be obtained.

  Moreover, in the said embodiment, although the width | variety of the beam part 33 is the same as the pillar part 31 in the front-back direction, as shown to Fig.8 (a), when the width | variety of the beam part 33 is narrower than the pillar part 31, The present invention can be applied as shown in FIG.

  Moreover, in the said embodiment, although this invention is applied with respect to the concrete pier 3 using the pillar part 31 which has a rectangular cross section, the application object of this invention is not limited to this. For example, as shown in FIG. 9A, the cross-sectional shape on the opposite side of the beam portion 33 is curved with respect to the connection portion with the beam portion 33, and the cross section of the column portion 31 is substantially semi-elliptical. The present invention can also be applied to cases. In this case, as shown in FIG. 9, a plurality of support members 10 can be used instead of the engagement members 45, 46, 53, 54, 57, and 58. Each support member 10 has a columnar shape that can be engaged with the surface of the column part 31, and an outer surface thereof is formed in a curved shape corresponding to the curved shape of the column part 31. Further, a guide groove 10A for guiding the fastening members 48A, 48C, 48D, 59A, 59B is formed on the outer surface of each support member 10. For this reason, as shown in FIG. 9A, the fastening members 48A, 48C, 48D, 59A, 59B can be spaced apart from the column portion 31 by the amount provided with the support member 10, and the main bars can be disposed therebetween. It has become.

  In the above embodiment, the first engaging member 41 and the fourth engaging member 44 are connected and integrated by the connecting member 47A, and the second engaging member 42 and the third engaging member 43 are connected. Although the members 47B are connected and integrated with each other, for example, as shown in FIG. 10A, the engaging members 41 to 44 may be arranged in a state of being separated from each other. Further, the fifth engagement member 45 may be provided by being separated into two engagement members 451 and 451. The same applies to the sixth engagement member 46.

  Moreover, in the said embodiment, although the reinforcement tools 4-6 are mounted | worn with respect to the concrete pier 3 with which one beam part 33 was connected with respect to the pillar part 31 in the same position in an up-down direction, The present invention can also be applied to a concrete pier in which the beam portion is horizontally provided from the column portion 31 in different horizontal directions. That is, the first engagement member 41, the second engagement member 42, the third engagement member 43, and the fourth engagement member 44 are set as a set of engagement member groups, and an engagement member group is provided for each beam portion 33. The first column engaging portion 412 and the second column engaging portion 422 are connected and tensioned so that the upper column tightening member surrounds the column portion 31, and the lower column tightening member surrounds the column portion 31. The column engaging portion 432 and the fourth column engaging portion 442 may be connected and tensioned, and the beam tightening member 65 may be provided for each beam portion. For example, as shown in FIG. 10B, for the connecting portion 35 of the concrete bridge pier 3 in which the two intermediate beam portions 331 and 332 are connected to the column portion 31 at right angles in a plan view from above, The first engagement member 41, the second engagement member 42, the third engagement member 43, the fourth engagement member 44, the sixth engagement member (not shown in the figure, but with reference numeral 46 in FIG. 3B) The same configuration), the seventh engagement member 40A, the eighth engagement member 40B, and a plurality of tightening members (broken lines in the figure) can be reinforced.

  Of these, the seventh engagement member 40A is left with the beam engagement portion 413 of the first engagement member 41 and the beam engagement portion 423 of the second engagement member 42 independently, while the first engagement member 41 is left. And the column engaging portion 412 of the first engaging member 41 and the column engaging portion of the second engaging member 42. 422 is shared, and the first engagement member 41 and the second engagement member 42 are integrated. On the other hand, the eighth engagement member 40B remains independent of the beam engagement portion 433 of the third engagement member 43 and the beam engagement portion 443 of the fourth engagement member 44, while the third engagement member 43 The connection engagement portion 431 and the connection engagement portion 441 of the fourth engagement member 44 are made common, and the column engagement portion 432 of the third engagement member 43 and the column engagement portion 442 of the fourth engagement member 44 are shared. And the third engagement member 43 and the fourth engagement member 44 are integrated.

  As shown in FIG. 10B, the intermediate beam portions 331 and 332 in the connecting portion 35 are arranged with the seventh engaging member 40A and the eighth engaging member 40B engaging with the connecting portions adjacent to each other. Then, the engaging members 41 to 44 are arranged to be engaged with the remaining connecting portions, and the connecting portions 35 are reinforced by providing tightening members between the column engaging portions and between the beam engaging portions. Has been. Here, the seventh engaging member 40A is engaged with the adjacent connecting portion, but it is not essential to integrate the seventh engaging member 40A, and the engaging members 41, 42 are arranged in separate forms. Also good. This is the same for the eighth engagement member 40B. These points are the same for FIGS. 10C and 10D.

  As shown in FIG. 10 (c), with respect to the connecting portion 35 of the concrete bridge pier 3 in which the three intermediate beam portions 331 to 333 are connected to the column portion 31 at right angles in plan view from above, 1 engagement member 41, 2nd engagement member 42, 3rd engagement member 43, 4th engagement member 44, two 7th engagement members 40A, two 8th engagement members 40B, and a plurality of tightening members ( It can be reinforced by the reinforcing device 4 having a broken line in FIG. Further, as shown in FIG. 10 (d), with respect to the connecting portion 35 of the concrete pier 3 in which the four intermediate beam portions 331 to 334 are connected to the column portion 31 orthogonally in a plan view from above. Reinforcing apparatus 4 having four seventh engaging members 40A, four eighth engaging members 40B, and a plurality of tightening members (broken lines in the figure) can reinforce.

  In the above embodiment, the fastening members 48A to 48D, 59A, 59B, 65 are composed of a PC steel rod and a nut. However, the construction of the fastening member is not limited to this, for example, a PC steel rod. Instead of, a threaded reinforcing bar or steel wire may be used.

  Furthermore, the application object of the present invention is not limited to the multilayer ramen pier shown in FIG. 1 or FIG. 8, but is applied to a concrete pier in which a beam portion is horizontally provided from a column portion and a connection portion is formed. be able to.

  The present invention can be applied to all techniques for reinforcing a concrete pier having a rigid frame structure in which a beam portion is provided laterally with respect to a column portion.

3 ... concrete pier,
4 ... Reinforcing device,
7 ... Main muscle,
8 ... Formwork,
33, 331-334 ... intermediate beam part,
35 ... connecting part,
40A ... seventh engaging member,
40B ... eighth engaging member,
41 ... 1st engaging member,
42 ... second engaging member,
43 ... third engaging member,
44. Fourth engaging member,
45. Fifth engaging member,
46: Sixth engaging member,
47A ... rear side connecting member (one side connecting member),
47B ... front side connection member (other side connection member),
48A, 59A ... upper column fastening members,
48B, 65 ... Beam tightening member,
48C, 59B ... lower column tightening member,
48D: Intermediate column fastening member,
411 ... 1st connection engaging part,
412 ... 1st pillar engaging part,
413 ... 1st beam engaging part,
421 ... a second coupling engagement part,
422 ... Second pillar engaging portion,
423 ... second beam engaging portion,
431 ... third connection engagement portion,
432 ... third pillar engaging portion,
433 ... third beam engaging portion,
441 ... the fourth connecting engagement part,
442 ... Fourth pillar engaging portion,
443 ... fourth beam engaging portion,
451 ... fifth column engaging portion,
461: Sixth column engaging portion C1, C2, C4: connection portion

Claims (7)

A concrete pier reinforcement device that reinforces a connecting portion in which a pillar portion erected vertically in a concrete pier and a beam portion horizontally installed from the pillar portion are connected to each other,
A first connection engagement portion that engages with a connection portion between the column portion and the beam portion on one side in the width direction of the beam portion and on the upper surface side of the beam portion, and stands from the first connection engagement portion A first column engaging portion that engages with a corner portion of the column portion, and a first beam engagement that is provided laterally from the first connection engaging portion and engages with a corner portion of the beam portion. A first engagement member having a portion;
A second connection engagement portion that engages with a connection portion between the column portion and the beam portion on the other side in the width direction of the beam portion and on the upper surface side of the beam portion; A second column engaging portion that engages with a corner portion of the column portion, and a second beam engagement that is laterally provided from the second connection engaging portion and engages with a corner portion of the beam portion. A second engagement member having a portion;
A third connection engagement portion that engages with a connection portion between the column portion and the beam portion on the other side in the width direction of the beam portion and on the lower surface side of the beam portion; A third column engaging portion that is provided and engages with a corner portion of the column portion; and a third beam engagement that is provided laterally from the third connection engaging portion and engages with a corner portion of the beam portion. A third engaging member having a portion;
A fourth connection engagement portion that engages with a connection portion between the column portion and the beam portion on one side in the width direction of the beam portion and on the lower surface side of the beam portion; A fourth column engaging portion that engages with a corner portion of the column portion, and a fourth beam engagement that is laterally provided from the fourth connection engaging portion and engages with a corner portion of the beam portion. A fourth engaging member having a portion;
An upper column tightening member that connects and tensions the first column engaging portion and the second column engaging portion so as to surround the column portion;
A lower column tightening member that connects and tensions the third column engaging portion and the fourth column engaging portion so as to surround the column portion;
A beam fastening member that connects and tensions the first beam engaging portion, the second beam engaging portion, the third beam engaging portion, and the fourth beam engaging portion so as to surround the beam portion;
A concrete bridge pier reinforcement device comprising: A concrete pier reinforcement device according to claim 1,
5th engagement which has the 5th column engagement part engaged with the corner | angular part of the said column part on the opposite side of the said 1st column engagement part and the said 4th column engagement part in the horizontal installation direction of the said beam part A member,
A sixth engaging member having a sixth column engaging portion that engages with a corner portion of the column portion on the opposite side of the second column engaging portion and the third column engaging portion in the lateral direction; Further comprising
The upper column tightening member connects the first column engaging portion, the second column engaging portion, the fifth engaging portion, and the sixth engaging portion so as to surround the column portion. Tension,
The lower column tightening member connects the third column engaging portion, the fourth column engaging portion, the fifth engaging portion, and the sixth engaging portion so as to surround the column portion. Reinforcing equipment for concrete piers to be tensed. A concrete pier reinforcement device according to claim 2,
A one-side connecting member that connects the first engaging member and the fourth engaging member;
The other side connecting member that connects the second engaging member and the third engaging member;
The one side connecting member and the fifth engaging member, and the other side connecting member and the sixth engaging member are connected between the upper column tightening member and the lower column tightening member in the vertical direction. A concrete pier reinforcement device, further comprising: an intermediate column tightening member for tensioning. A concrete bridge pier reinforcement device according to claim 3,
The intermediate column tightening member is for a concrete pier that connects and tensions the fifth engagement member and the sixth engagement member between the upper column tightening member and the lower column tightening member in the vertical direction. Reinforcing equipment. A concrete pier reinforcement device according to claim 1,
When a plurality of the beam portions are horizontally provided from the pillar portions in different horizontal directions,
The first engagement member, the second engagement member, the third engagement member, and the fourth engagement member are used as a set of engagement member groups, and the engagement member group is provided for each beam portion. ,
The upper column tightening member connects and tensions the plurality of first column engaging portions and the plurality of second column engaging portions so as to surround the column portion,
The lower column tightening member connects and tensions the plurality of third column engaging portions and the plurality of fourth column engaging portions so as to surround the column portion,
The beam tightening member is a concrete pier reinforcement device provided for each beam portion. A concrete pier reinforcement device according to claim 5,
In the two engaging member groups adjacent to each other, the first engaging member and the second engaging member that engage with the same corner portion of the column portion are integrated, and the column portion has the same configuration. A concrete pier reinforcement device in which the third engagement member and the fourth engagement member that engage with the corner portion of the concrete are integrated. The concrete bridge pier is reinforced by using the concrete bridge pier reinforcement device according to claim 1, wherein a connecting portion in which a pillar portion erected in a vertical direction and a beam portion horizontally provided from the pillar portion are connected to each other is connected. A concrete pier reinforcement method,
The first engagement member, the second engagement member, the third engagement member, and the fourth engagement member are engaged with the connecting portion, and the column portion is surrounded by the upper column tightening member. The first column engaging portion and the second column engaging portion are connected, and the third column engaging portion and the fourth column engaging portion are connected so as to surround the column portion by the lower column tightening member. The first beam engaging portion, the second beam engaging portion, the third beam engaging portion, and the fourth beam engaging portion are connected to each other so as to surround the beam portion by the beam tightening member. Then, a first step of temporarily mounting the concrete bridge pier reinforcement device to the connecting portion,
A main bar is disposed between the upper column tightening member, the lower column tightening member and the beam tightening member, and the connecting portion, and with respect to the upper column tightening member, the lower column tightening member, and the beam tightening member. A second step of temporarily binding the main muscles,
A third step of binding the main bar to the upper column tightening member, the lower column tightening member and the beam tightening member after tensioning the upper column tightening member, the lower column tightening member and the beam tightening member;
And a fourth step of placing concrete after installing the formwork so as to surround the reinforcing equipment for the concrete pier and the main reinforcement,
The concrete pier reinforcement method, wherein the first to fourth steps are executed in this order.

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