JP2009209514A - Joint structure of concrete member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure of a concrete member capable of improving joint strength of the concrete member against bending in the predetermined direction. <P>SOLUTION: This joint structure of the concrete member is constituted by burying U-shaped reinforcing bars 4 having a first reinforcing bar 5 and a second reinforcing bar 6 to be buried into the concrete member 1 and a connection part 7 connected with the first reinforcing bar 5 and the second reinforcing bar 6 and protruding from a joint surface 2 of the concrete member 1 into the concrete member 1. These U-shaped reinforcing bars 4 are arranged in peripheral fringe parts of the concrete member 1 by corresponding to each of outer peripheral faces 3a-3d of the concrete member 1, are arranged in three rows in parallel with each of outer peripheral faces 3a-3d of the concrete member 1, and are arranged at two steps from each of outer peripheral faces 3a-3d toward a central side of the concrete member 1. The connection parts 7 of each of the concrete members 1 are overlapped by letting the joint surfaces 2 of a pair of concrete members 1 oppose to each other, a bearing reinforcement reinforcing bar 8 is arranged in the connection part 7, and joint concrete 9 is placed between the joint surfaces 2 of mutually opposing concrete members 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a concrete member joining structure for joining opposing concrete members.

Conventionally, linear reinforcing bars embedded in concrete members are projected from the joint surfaces of the concrete members, and the joint surfaces of the concrete members to be joined are opposed to each other, and the reinforcing bars projecting from each joint surface are pressed into joints or machines. After connecting by a type joint, a plurality of concrete members were joined by placing concrete between joint surfaces.
JP 2002-021221 A

  However, in the conventional joint structure of concrete members, since the reinforcing bars protruding from the joint surfaces are connected by pressure welding joints or mechanical joints, there is a problem in that the reinforcing bars must be aligned with high accuracy.

  By the way, in Patent Document 1, U-shaped reinforcing bars are embedded in a flat concrete member, the U-shaped reinforcing bars are overlapped with the bonding surfaces of the concrete members facing each other, and concrete is driven between the bonding surfaces of the concrete members. The joint structure of the concrete member which joins the opposing concrete member by installing is described.

  However, in the joint structure of the concrete member described in Patent Document 1, since the U-shaped reinforcing bars are arranged across both ends of the joining surface, the U-shaped reinforcing bars can be arranged only in one direction, There is a problem in that sufficient bonding strength with respect to bending in a predetermined direction cannot be obtained.

  Then, this invention is made | formed in view of such a problem, and it aims at providing the joining structure of the concrete member which can improve the joining strength of the concrete member with respect to the bending of a predetermined direction.

  The joint structure of a concrete member according to the present invention is a concrete member joint structure in which a joint material is filled between joint surfaces of opposing concrete members, and the opposing concrete members are joined. It has a reinforcing bar body which has a 2nd reinforcing bar part and a connecting part connected with the 1st reinforcing bar part and the 2nd reinforcing bar part, and the reinforcing bar body has the 1st reinforcing bar part and the 2nd reinforcing bar part are concrete. The connecting portion is embedded in the member and protrudes from the joint surface, and one or a plurality of the connecting portions are arranged on the peripheral portion of the concrete member.

  According to the joint structure of a concrete member according to the present invention, when the concrete members are opposed to each other and at least a part of the connecting portions are overlapped and the joining material is filled between the joint surfaces of the concrete members, the connecting portions of the opposing reinforcing bars are formed. Since the bonding material is sandwiched, even if the positioning accuracy of the concrete member is low, the facing concrete member can be easily bonded. And since this reinforcing bar is arrange | positioned in the peripheral part of a concrete member, the joint strength of the concrete member with respect to the load from a predetermined direction can be improved.

  In this case, the reinforcing bar body is preferably arranged on the concrete member such that the first reinforcing bar portion and the second reinforcing bar portion are arranged in a plurality of stages toward the center side of the concrete member. According to the joint structure of the concrete member, the first reinforcing bar portion and the second reinforcing bar portion embedded in the concrete member are arranged in a plurality of stages toward the center side of the concrete member. The joint strength of the concrete member can be further improved.

  Moreover, a reinforcing bar body is good also as arrange | positioning so that the surface formed by a 1st reinforcing bar part and a 2nd reinforcing bar part may become parallel with respect to the outer peripheral surface of a concrete member. According to the joint structure of the concrete member, since the surface formed by the first reinforcing bar portion and the second reinforcing bar portion is parallel to the outer peripheral surface of the concrete member, the reinforcing bar body is easily positioned with respect to the concrete member. be able to.

  Moreover, a reinforcing bar body is good also as arrange | positioning so that the surface formed by a 1st reinforcing bar part and a 2nd reinforcing bar part may incline with respect to the outer peripheral surface of a concrete member. According to the joint structure of the concrete member, since the first reinforcing bar portion and the second reinforcing bar portion are arranged at different distances with respect to the outer peripheral surface of the concrete member, one reinforcing bar body is arranged on the concrete member. Thus, the first reinforcing bar portion and the second reinforcing bar portion can be arranged in two stages toward the center side of the concrete member.

  The method for joining concrete members according to the present invention includes a step of facing the joint surfaces of any of the above concrete members, a step of at least partially overlapping the connecting portions of the reinforcing bars arranged on the facing concrete members, Filling a bonding material between the bonding surfaces of the opposed concrete members.

  According to the method for joining concrete members according to the present invention, when the concrete members are opposed to each other and at least a part of the connecting portions are overlapped and the joining material is filled between the joint surfaces of the concrete members, the connecting portions of the opposing reinforcing bars are formed. Since the bonding material is sandwiched, even if the positioning accuracy of the concrete member is low, the facing concrete member can be easily bonded. And since this reinforcing bar is arrange | positioned at the peripheral part of a concrete member, the joint strength of the concrete member with respect to the load from a predetermined direction can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, the joint strength of the concrete member with respect to the bending of a predetermined direction can be improved.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings. In the present embodiment, a prismatic concrete member formed in a predetermined length is joined in the vertical direction to construct a pier. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

[First Embodiment]
FIG. 1 is a perspective view showing a joint structure of a concrete member according to the first embodiment, and FIG. 2 is a plan view of the concrete member of FIG.

  As shown in FIG. 1, the concrete member 1 of 1st Embodiment is formed in the elongate prism by the concrete material, and comprises a part of pier. And the joining surface 2 joined to the other concrete member 1 is formed in the longitudinal direction end surface of the concrete member 1. In addition, although the joint surface 2 may be formed in the longitudinal direction both end surfaces of the concrete member 1, it demonstrates as what is formed in one end surface in this embodiment.

  A U-shaped reinforcing bar 4 is embedded in the concrete member 1. The U-shaped reinforcing bar 4 is composed of a single reinforcing bar, and is formed into a U-shape by bending the central portion at two locations. The U-shaped reinforcing bar 4 is formed with a first reinforcing bar portion 5 and a second reinforcing bar portion 6 that extend linearly and are arranged in parallel with each other at both ends. The first reinforcing bar portion 5 and the second reinforcing bar portion 6 are embedded along the longitudinal direction of the concrete member 1 from the joint surface 2, and constitute a reinforcing bar of the concrete member 1. Thereby, the concrete member has a reinforced concrete structure. In addition, the U-shaped reinforcing bar 4 is connected to the first reinforcing bar portion 5 and the second reinforcing bar portion 6 at the center portion, and a connecting portion 7 formed in a U shape is formed. The connecting portion 7 protrudes (exposes) from the joint surface 2 of the concrete member 1. The U-shaped reinforcing bars 4 are arranged so that the surfaces formed by the first reinforcing bar portions 5 and the second reinforcing bar portions 6 are parallel to the outer peripheral surfaces 3 a to 3 d of the concrete member 1. Has been.

  As shown in FIG. 2, the U-shaped reinforcing bars 4 are arranged on the peripheral edge of the concrete member 1 corresponding to the outer peripheral surfaces 3 a to 3 d of the concrete member 1. The outer peripheral surfaces 3 a to 3 d of the concrete member 1 refer to the respective side surfaces of the concrete member 1 that are adjacent to the joint surface 2. Moreover, the peripheral part of the concrete member 1 is the vicinity of each outer peripheral surface 3a-3d and between each outer peripheral surface 3a-3d and the center part of the concrete member 1.

  The U-shaped reinforcing bars 4 are arranged in three rows in parallel along the outer peripheral surfaces 3 a to 3 d of the concrete member 1. The U-shaped reinforcing bars 4 are arranged in two stages from the outer peripheral surfaces 3 a to 3 d toward the center side of the concrete member 1. That is, the concrete member 1 is provided with six (3 rows × 2 stages) U-shaped reinforcing bars 4 for each of the outer peripheral surfaces 3a to 3d, and as a whole, 24 (6 × 4 surfaces) U-shaped. Reinforcing bars 4 are arranged.

  Then, by arranging the U-shaped reinforcing bars 4 as described above, the first reinforcing bar portion 5 and the second reinforcing bar portion 6 embedded in the concrete member 1 are made from the outer peripheral surfaces 3a to 3d to the concrete member. 1 is arranged in two steps toward the center side. That is, the concrete member 1 is provided with 12 (6 rows × 2 stages) first reinforcing bar portions 5 and second reinforcing bar portions 6 for each of the outer peripheral surfaces 3a to 3d. The first reinforcing bar part 5 and the second reinforcing bar part 6 of the book (12 pieces × 4 surfaces) are arranged.

  Next, a joining method using the concrete member 1 will be described with reference to FIGS. 3 is a diagram in which concrete members are opposed to each other, FIG. 4 is a partially enlarged view of FIG. 3, FIG. 5 is a diagram in which U-shaped reinforcing bars are superimposed, and FIG. FIG. 7 is a partially enlarged view, FIG. 7 is a view in which a bearing reinforcing reinforcement is attached to a U-shaped rebar, and FIG. 8 is a view in which joint concrete is placed between joint surfaces.

  First, as shown in FIGS. 3 and 4, a pair of concrete members 1 in which the above-described U-shaped reinforcing bars 4 are embedded are prepared, and the joint surfaces 2 of the pair of concrete members 1 are opposed to each other.

  Next, as shown in FIGS. 5 and 6, a pair of opposing concrete members 1 are brought close to each other, and a part of the connecting portion 7 of each concrete member 1 is overlapped. At this time, the opposing connecting portions 7 are overlapped so that a rectangular closed space is formed by the opposing connecting portions 7 when viewed from the outer peripheral surfaces 3 a to 3 d of the concrete member 1. In addition, the connection part 7 which opposes may be overlap | superposed in the state which contacted, and may overlap | superpose in the state spaced apart.

  Next, as shown in FIG. 7, the supporting reinforcement reinforcing bars 8 are arranged in the connecting portion 7. The bearing reinforcing reinforcing bar 8 is formed in a rod shape longer than the distance between the first-stage U-shaped reinforcing bar 4 and the second-stage U-shaped reinforcing bar 4. The bearing reinforcement reinforcing bars 8 are rectangularly formed by the overlapping connecting portions 7 so as to be bridged between the first U-shaped reinforcing bar 4 and the second U-shaped reinforcing bar 4 for each row. Arranged at the four corners of the closed space. The bearing reinforcement reinforcing bar 8 is held and arranged on the bearing reinforcement reinforcing bar 8 with a wire or the like.

  After that, as shown in FIG. 8, joint concrete 9 is placed between the joint surfaces 2 of the opposing concrete members 1, and the joint concrete 9 is cured to join the opposing concrete members 1.

[Second Embodiment]
Next, a second embodiment according to the present invention will be described. The second embodiment is basically the same as the first embodiment, and only the arrangement of the U-shaped reinforcing bars 4 is different. For this reason, in the following description, only points different from the first embodiment will be described.

  FIG. 9 is a plan view of a concrete member according to the second embodiment. As shown in FIG. 9, the U-shaped reinforcing bars 4 are arranged on the peripheral edge of the concrete member 1 corresponding to the outer peripheral surfaces 3 a to 3 d of the concrete member 1.

  The U-shaped reinforcing bars 4 are arranged so that the surfaces formed by the first reinforcing bar portion 5 and the second reinforcing bar portion 6 are perpendicular to the outer peripheral surfaces 3 a to 3 d of the concrete member 1. Has been. The U-shaped reinforcing bars 4 are arranged along the outer peripheral surfaces 3a to 3d of the concrete member 1 and in six rows at right angles to the outer peripheral surfaces 3a to 3d. That is, in the concrete member 1, six (6 rows × 1 step) U-shaped reinforcing bars 4 are arranged for each of the outer peripheral surfaces 3a to 3d, and as a whole, 24 (6 × 4 surfaces) U-shaped. Reinforcing bars 4 are arranged.

  Then, by arranging the U-shaped reinforcing bars 4 as described above, the first reinforcing bar portion 5 and the second reinforcing bar portion 6 embedded in the concrete member 1 are made from the outer peripheral surfaces 3a to 3d to the concrete member. 1 is embedded in two steps toward the center side. That is, the concrete member 1 is provided with 12 (6 rows × 2 stages) first reinforcing bar portions 5 and second reinforcing bar portions 6 for each of the outer peripheral surfaces 3a to 3d. The first reinforcing bar part 5 and the second reinforcing bar part 6 of the book (12 pieces × 4 surfaces) are arranged.

  Next, a joining method using the concrete member 1 will be described with reference to FIGS. 10 is a diagram in which concrete members are opposed to each other, FIG. 11 is a diagram in which U-shaped reinforcing bars are superposed, and FIG. 12 is a diagram in which bearing reinforcing reinforcing bars are attached to the U-shaped reinforcing bars. These are the figures which laid joint concrete between joining surfaces.

  First, as shown in FIG. 10, a pair of concrete members 1 in which the above-described U-shaped reinforcing bars 4 are embedded are prepared, and the joint surfaces 2 of the pair of concrete members 1 are opposed to each other.

  Next, as shown in FIG. 11, a pair of opposing concrete members 1 are brought close to each other, and a part of the connecting portion 7 of each concrete member 1 is overlapped. At this time, the opposing connecting portions 7 are overlapped so that a rectangular closed space is formed by the opposing connecting portions 7 when viewed from the outer peripheral surfaces 3a to 3d adjacent to the outer peripheral surfaces 3a to 3d of the concrete member 1. . In addition, the connection part 7 which opposes may be overlap | superposed in the state which contacted, and may overlap | superpose in the state spaced apart.

  Next, as shown in FIG. 12, the bearing reinforcing reinforcing bars 10 are disposed in the connecting portion 7. The bearing reinforcing reinforcing bars 10 are formed in a bar shape longer than the interval between the outermost U-shaped reinforcing bars 4 arranged on the outer peripheral surfaces 3a to 3d. Then, the bearing reinforcing reinforcing bar 10 is closed by a rectangular portion formed by the overlapping connecting portions 7 so as to be bridged over all the U-shaped reinforcing bars 4 for each peripheral edge corresponding to each of the outer peripheral surfaces 3a to 3d. Arranged at the four corners of the space.

  Thereafter, as shown in FIG. 13, the joint concrete 9 is placed between the joint surfaces 2 of the opposing concrete members 1, and the joint concrete 9 is cured to join the opposing concrete members 1.

  As described above, according to the joint structure for a concrete member according to the present embodiment, the concrete member 1 is opposed and a part of the connecting portion 7 is overlapped, and the joint concrete 9 is driven between the joint surfaces 2 of the concrete member 1. If it sets, since the connection concrete 9 which the connection part 7 of the opposing U-shaped reinforcing bar 4 hardened is inserted, even if the alignment accuracy of a concrete member is low, the opposing concrete member 1 can be joined easily. And since this U-shaped reinforcement 4 is arrange | positioned in the peripheral part of the concrete member 1, the joint strength of the concrete member 1 with respect to the load from arbitrary directions can be improved.

  Furthermore, since the 1st rebar part 5 and the 2nd rebar part 6 embed | buried under the concrete member 1 are arrange | positioned in multiple steps (2 steps) toward the center side of the concrete member 1, from arbitrary directions It is possible to further improve the joint strength of the concrete member 1 with respect to the load.

  Further, since the supporting reinforcement reinforcing bars 8 are arranged at the four corners of the rectangular closed space formed by the overlapping connecting portions 7, the opposing connecting portions 7 can sandwich the joint concrete 9 evenly, and the concrete member 1. The bonding strength can be further improved.

  According to the first embodiment, the surface formed by the first reinforcing bar portion 5 and the second reinforcing bar portion 6 is parallel to the outer peripheral surface of the concrete member. The U-shaped reinforcing bar 4 can be easily positioned.

  Moreover, according to 2nd Embodiment, since the 1st rebar part 5 and the 2nd rebar part 6 are arrange | positioned in different distance with respect to each outer peripheral surface 3a-3d of the concrete member 1, 1 By arranging the two U-shaped reinforcing bars 4 on the concrete member 1, the first reinforcing bar portion 5 and the second reinforcing bar portion 6 can be arranged in two stages toward the center side of the concrete member 1.

  As mentioned above, although this invention was concretely demonstrated based on the embodiment, this invention is not limited to the said embodiment. For example, in the above embodiment, the U-shaped reinforcing bars 4 are arranged in parallel to the outer peripheral surfaces 3a to 3d in the first embodiment, and are arranged perpendicular to the outer peripheral surfaces 3a to 3d in the second embodiment. Although demonstrated, if it arrange | positions to the peripheral part of the concrete member 1, the inclination angle with respect to outer peripheral surfaces 3a-3d may be what angle, and may change an inclination angle with the place to arrange | position.

  Moreover, in the said embodiment, although demonstrated that the U-shaped reinforcement 4 was arrange | positioned along all the outer peripheral surfaces 3a-3d, according to the direction of the load which the concrete member 1 joined joins the outer peripheral surfaces 3a-. You may make it arrange | position along one surface or several surfaces (at the peripheral part of one surface or several surfaces) among 3d.

  Moreover, in the said embodiment, although the connection part 7 demonstrated using the U-shaped rebar 4 bent in the U shape, you may use the reinforcing bar which has the connection part bent in what shape, for example, a connection part is A U-shaped reinforcing bar bent in a U-shape may be used.

  Moreover, in the said embodiment, although the concrete member 1 demonstrated as what joins to a vertical direction and constructs a bridge pier, you may apply to what joins to a horizontal direction, such as a floor slab and a beam, for example.

It is the perspective view which showed the concrete member of 1st Embodiment. It is a top view of the concrete member of FIG. It is the figure which made the concrete member oppose. FIG. 4 is a partially enlarged view of FIG. 3. It is the figure which piled up the U-shaped rebar. FIG. 6 is a partially enlarged view of FIG. 5. It is the figure which attached the bearing reinforcement reinforcement to the U-shaped reinforcement. It is the figure which laid joint concrete between joining surfaces. It is a top view of the concrete member of a 2nd embodiment. It is the figure which made the concrete member oppose. It is the figure which piled up the U-shaped rebar. It is the figure which attached the bearing reinforcement reinforcement to the U-shaped reinforcement. It is the figure which laid joint concrete between joining surfaces.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Concrete member, 2 ... Joining surface, 4 ... U-shaped reinforcing bar (rebar), 5 ... 1st reinforcing bar part, 6 ... 2nd reinforcing bar part, 7 ... Connection part, 9 ... Bonding concrete (joining material) .

Claims (5)

It is a joint structure of a concrete member that fills a joint material between joint surfaces of opposing concrete members and joins the opposing concrete members,
A reinforcing bar body having a first reinforcing bar part and a second reinforcing bar part, and a connecting part connected to the first reinforcing bar part and the second reinforcing bar part;
In the reinforcing bar body, the first reinforcing bar portion and the second reinforcing bar portion are embedded in the concrete member, and the connecting portion protrudes from the joint surface. A joint structure for a concrete member, characterized by being arranged.   The reinforcing bar body is arranged on the concrete member such that the first reinforcing bar part and the second reinforcing bar part are arranged in a plurality of stages toward the center side of the concrete member. Item 8. A joint structure of concrete members according to Item 1.   The said reinforcing bar body is arrange | positioned so that the surface formed by a 1st reinforcing bar part and a said 2nd reinforcing bar part may become parallel with respect to the outer peripheral surface of the said concrete member. The joint structure of concrete members according to 2.   The said reinforcing bar body is arrange | positioned so that the surface formed by a 1st reinforcing bar part and a said 2nd reinforcing bar part may incline with respect to the outer peripheral surface of the said concrete member. The joint structure of a concrete member according to any one of the above. A step of facing the joint surface of the concrete member according to any one of claims 1 to 4,
A step of at least partially overlapping the connecting portions of the reinforcing bars arranged on the facing concrete member;
Filling a bonding material between the bonding surfaces of the opposed concrete members;
A method for joining concrete members, characterized by comprising:

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