JP2013068080A - Construction method of column-beam joint part of viaduct, and viaduct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method of a column-beam joint part of a viaduct which can eliminate concrete placing work at a job site.SOLUTION: A sleeve joint connected to a column main reinforcement is exposed from the top surface of a column. A first PC member composing a column-beam joint part provided with a vertically extending through hole, a beam main reinforcement, and a sleeve joint connected to a beam main reinforcement and exposing from the side of the member is built in the upper part of the column, and a connecting reinforcing bar is inserted into the through hole of the first PC member so that its tip is inserted into the sleeve joint of the column. A second PC member composing a beam and provided with a beam main reinforcement projecting from the side is built by horizontally moving the projecting part of the beam main reinforcement so as to be inserted into the sleeve joint of the first PC member. Grout is filled into the through hole of the first PC member and into the sleeve joint of the column and the first PC member. A supporting frame is provided which supports the second PC member, which composing the beam, to the column with a reaction force.

Description

  The present invention relates to a method for constructing a viaduct beam-column joint using a PC member.

  Conventionally, when constructing RC viaducts for railways or roads, PC (precast concrete) members have been used for the purpose of shortening the construction period. As a construction method of such a viaduct using a PC member, for example, in Patent Document 1, a pillar made of a PC member is erected, and a cross beam made of a PC member is erected between the erected pillars. A method of constructing a viaduct by placing concrete in the head of a column after arranging reinforcing bars of columns and cross beams (beams) in the section is described.

  In addition, the applicants of the present application, as a construction method for building a column beam structure of a building using PC members, enables concrete construction on the site by allowing the PC members constituting the columns to be built in the horizontal direction. A construction method that omits the process has been proposed (see, for example, Patent Document 2).

JP 2004-324216 A Japanese Patent No. 3837390

  In the method described in Patent Document 1, since it is necessary to perform reinforcement work for reinforcing bars constituting the columns and beams in the beam-column joint at the site, it is necessary to place concrete in the beam-column joint. For this reason, there has been a problem that the next process cannot be performed until concrete placement and curing are completed, and the construction period is prolonged.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for constructing a viaduct beam-column joint that can eliminate the work of placing concrete in the field.

The present invention is a method of constructing a beam-column joint in which columns and beams constituting a viaduct are joined,
A sleeve joint is connected to the column main reinforcement of the column, and the sleeve joint is exposed on the upper surface of the column,
A first PC member comprising at least the column-beam joint, a through-hole extending in the vertical direction, a beam main bar extending in the horizontal direction, and a sleeve joint connected to the beam main bar and exposed to the side of the member Is built on top of the pillar,
Inserting a connecting rebar into the through hole of the first PC member so that the tip is inserted into the sleeve joint of the column,
A second PC member comprising a beam main bar constituting the beam and having a tip protruding from a side surface is horizontally arranged so that a protruding portion of the beam main bar is inserted into a sleeve joint of the first PC member. Move in the direction and build,
In the method of filling grout in the through hole of the first PC member and in the sleeve joint of the column and the first PC member,
A support frame for supporting the second PC member by taking a reaction force on the pillar is provided.

Further, the present invention is a method of constructing a column beam joint where the columns and beams constituting the viaduct are joined,
A sleeve joint is connected to the column main reinforcement of the column, and the sleeve joint is exposed on the upper surface of the column,
A first PC member that comprises at least the column-beam joint and includes a through-hole extending in the vertical direction and a beam main bar extending in the horizontal direction and having a tip protruding from the side surface of the member is built on the upper portion of the column. Including
Inserting a connecting rebar into the through hole of the first PC member so that the tip is inserted into the sleeve joint of the column,
A second PC member comprising the beam main bar that constitutes the beam and extends in the horizontal direction and a sleeve joint that is connected to the beam main bar and exposed on the side of the member is used as a protrusion of the beam main bar of the first PC member. So that the part to be inserted is inserted into the sleeve joint of the second PC member, and moved in the horizontal direction,
In the method of filling grout in the through hole of the first PC member and in the sleeve joint of the first and second PC members,
A support frame for supporting the second PC member by taking a reaction force on the pillar is provided.

Further, the present invention is a method of constructing a column beam joint where the columns and beams constituting the viaduct are joined,
A sleeve joint is connected to the column main reinforcement of the column, and the sleeve joint is exposed on the upper surface of the column,
A first PC member comprising at least the column beam joint and protruding from the lower surface and a through-hole penetrating in the horizontal direction is provided. The protruding portion of the column beam is the sleeve of the column Move it vertically so that it can be inserted into the joint,
A second PC member comprising the beam main bar and a sleeve joint that is connected to the beam main bar and exposed on the side surface of the member is built on the side of the first PC member.
Inserting a connecting rebar into the through hole of the first PC member so that the tip is inserted into the sleeve joint of the second PC member,
In the method of filling the grout in the through hole of the first PC member, the sleeve and the sleeve joint of the second PC member,
A support frame for supporting the second PC member by taking a reaction force on the pillar is provided.

Further, the present invention is a method of constructing a column beam joint where the columns and beams constituting the viaduct are joined,
The column main reinforcement of the column is protruded from the upper surface,
A first PC comprising at least the column beam joints extending in the vertical direction, a sleeve joint that is connected to the column main bars and exposed on the lower surface of the member, and a through hole that penetrates in the horizontal direction. The member is built by moving in the vertical direction so that the protruding portion of the column main bar of the column is inserted into the sleeve joint,
A second PC member comprising the beam main bar and a sleeve joint that is connected to the beam main bar and exposed on the side surface of the member is built on the side of the first PC member.
Inserting a connecting rebar into the through hole of the first PC member so that the tip is inserted into the sleeve joint of the second PC member,
In the method of filling grout into the through hole of the first PC member and the sleeve joint of the first and second PC members,
A method for constructing a viaduct beam-to-column joint comprising providing a support frame for supporting the second PC member by taking a reaction force on the column.

Further, the present invention is a method of constructing a column beam joint where the columns and beams constituting the viaduct are joined,
A sleeve joint is connected to the column main reinforcement of the column, and the sleeve joint is exposed on the upper surface of the column,
A first PC member that comprises at least the first column-beam joint and includes a first through hole extending in the vertical direction and a second through hole penetrating in the horizontal direction is built in the upper portion of the column. ,
A connecting rebar is inserted into the first through hole of the first PC member so that a tip is inserted into the sleeve joint of the column;
A second PC member comprising the beam main bar and a sleeve joint that is connected to the beam main bar and exposed on the side surface of the member is built on the side of the first PC member.
Inserting a connecting rebar into the second through hole of the first PC member so that the tip is inserted into the sleeve joint of the second PC member;
In the method of filling grout in the first and second through holes of the first PC member and in the sleeve joint of the pillar and the first PC member,
A support frame for supporting the second PC member by taking a reaction force on the pillar is provided.

Further, the present invention is a method of constructing a column beam joint where the columns and beams constituting the viaduct are joined,
While constructing the column and beam-column joint, a through-hole penetrating in the horizontal direction is provided in the beam-column joint,
The beam is constituted, and a PC member provided with a beam main bar and a sleeve joint that is connected to the beam main bar and is exposed on the side surface of the member is built on the side of the column beam connection part,
Insert a connecting rebar into the through hole of the beam-column joint so that the tip is inserted into the sleeve joint of the PC member,
In the method of filling the grout in the through hole of the beam-column joint and the sleeve joint of the PC member,
A support frame for supporting the PC member by taking a reaction force on the pillar is provided.

  According to the present invention, after the PC members constituting the beam-column joint and the beam are built, the PCL can be joined by filling the grout into the sleeve joint or the through hole. It is possible to construct a viaduct beam-column joint without driving.

It is a side view which shows the viaduct constructed | assembled by the construction method of this embodiment. It is a top view which shows the viaduct constructed | assembled by the construction method of this embodiment. It is CC sectional drawing in FIG. 1A which shows the viaduct constructed | assembled by the construction method of this embodiment. It is a figure for demonstrating the junction structure of the column of a pattern 1, and a column beam junction part. It is a figure for demonstrating the junction structure of the column of a pattern 2, and a column beam junction part. It is a figure for demonstrating the junction structure of the column of a pattern 3, and a column beam junction part. It is a figure for demonstrating the junction structure of the beam of a pattern A, and a column beam junction part. It is a figure for demonstrating the junction structure of the beam of a pattern B, and a column beam junction part. It is a figure for demonstrating the junction structure of the beam of a pattern C, and a column beam junction part. It is FIG. (1) for demonstrating the construction method of the viaduct of this embodiment. In each figure, (B) is a plan view, and (A) is a cross-sectional view taken along line AA in (B). It is FIG. (2) for demonstrating the construction method of the viaduct of this embodiment. In each figure, (B) is a plan view, and (A) is a cross-sectional view taken along line AA in (B). It is FIG. (3) for demonstrating the construction method of the viaduct of this embodiment. In each figure, (B) is a plan view, and (A) is a cross-sectional view taken along line AA in (B). It is FIG. (4) for demonstrating the construction method of the viaduct of this embodiment. In each figure, (B) is a plan view, and (A) is a cross-sectional view taken along line AA in (B). It is FIG. (5) for demonstrating the construction method of the viaduct of this embodiment. In each figure, (B) is a plan view, and (A) is a cross-sectional view taken along line AA in (B). It is FIG. (6) for demonstrating the construction method of the viaduct of this embodiment. In each figure, (B) is a plan view, and (A) is a cross-sectional view taken along line AA in (B). It is a figure (the 7) for demonstrating the construction method of the viaduct of this embodiment. In each figure, (B) is a plan view, and (A) is a cross-sectional view taken along line AA in (B). It is FIG. (8) for demonstrating the construction method of the viaduct of this embodiment. In each figure, (B) is a plan view, and (A) is a cross-sectional view taken along line AA in (B). It is FIG. (9) for demonstrating the construction method of the viaduct of this embodiment. In each figure, (B) is a plan view, and (A) is a cross-sectional view taken along line AA in (B). It is a figure (the 10) for demonstrating the construction method of the viaduct of this embodiment. In each figure, (B) is a plan view, and (A) is a cross-sectional view taken along line AA in (B). It is a figure (the 11) for demonstrating the construction method of the viaduct of this embodiment. In each figure, (B) is a plan view, and (A) is a cross-sectional view taken along line AA in (B). It is one kind of vertical sectional view which shows the support frame which supports PC beam member. The support frame which supports PC beam member is shown, and it is a BB 'arrow line view in FIG. 5A. FIG. 5C is a view taken along the line CC ′ in FIG. It is a DD 'arrow line view in Drawing 5A which shows a support frame which supports PC beam member.

  Hereinafter, an embodiment of the method for constructing a viaduct of the present invention will be described in detail with reference to the drawings.

  1A to 1C are views showing a viaduct 10 constructed by the construction method of the present embodiment, FIG. 1A is a side view, FIG. 1B is a plan view, and FIG. 1C is a cross-sectional view taken along the line CC in FIG. . As shown in FIGS. 1A to 1C, the viaduct 10 includes a foundation structure 20 composed of a pile 201 and a pressure platen 202 constructed in the ground, and a width direction of the viaduct 10 above the foundation structure 20 (left and right in FIG. 1C). Direction) columns 30 erected on the both sides in a direction in which the viaduct 10 extends (left and right direction in FIG. 1A) with a predetermined interval, a beam 40 assembled so as to extend vertically and horizontally above the column 30, and a beam And a slab 50 constructed on the top of 40. In the present embodiment, it is assumed that a railroad passes under the viaduct 10 in the left-right direction in FIG. 1B. For the following description, the beams 40 extending in the left-right direction in FIG. 1B are A to B from the top to the bottom in the drawing, and the beams 40 extending in the vertical direction are 1 to 3 from the right to the left, respectively. And

First, the construction method of the column beam joint in the viaduct used in this embodiment will be described.
In the method for constructing a beam-column joint in a viaduct according to the present embodiment, any one of the following three methods of connecting a column and a beam-column joint is used.

<Pattern 1>
FIG. 2A is a diagram for explaining a joint structure between a column of pattern 1 and a column beam junction. As shown in the figure, the PC member 63 includes a joint portion 63A constituting a beam-column joint portion and a beam portion 63B constituting a beam end portion connected to the joint portion 63A. The column main reinforcement 64 is embedded at a position corresponding to 63A so as to extend in the vertical direction, and the lower end projects from the lower surface of the member. The column 60 is made of a PC member or cast-in-place concrete, and includes a column main bar 61 embedded so as to extend in the vertical direction, and a sleeve joint 62 connected to the upper end of the column main bar 61 and exposed on the upper surface of the column.

  When connecting the column 60 and the joint portion 63A, the PC member 63 is inserted from above the column 60 so that the protruding portion of the column main bar 64 of the PC member 63 is inserted into the sleeve joint 62 of the column 60. Lower and build. Then, grout is filled in the sleeve joint 62 and the joint between the PC member 63 and the column 60. When the filled grout is hardened, the PC member 63 constituting the joint portion 63A and the column 60 are joined.

<Pattern 2>
FIG. 2B is a diagram for explaining a joint structure between a column of the pattern 2 and a column beam junction. As shown in the figure, the PC member 67 includes a joint portion 67A and a beam portion 67B that constitutes a beam end portion connected to the joint portion 67A, and is located at a position corresponding to the column beam joint portion 67A. A column main reinforcement 68 embedded so as to extend in the vertical direction and a sleeve joint 69 connected to the lower end of the column main reinforcement 68 and exposed on the lower surface of the member are provided. The column 65 is made of a PC member or cast-in-place concrete, and includes a column main reinforcement 66 that is embedded so as to extend in the vertical direction and whose upper end protrudes from the upper surface of the member.

  When connecting the column 65 and the joint portion 67A, the PC member 67 is placed above the column 65 so that the protruding portion of the column main bar 66 of the column 65 is inserted into the sleeve joint 69 of the PC member 67. Descent from and build. Then, grout is filled in the sleeve joint 69 and the joint between the PC member 67 and the column 65. As the filled grout is hardened, the PC member 67 and the column 65 constituting the joint portion 67A are joined.

<Pattern 3>
FIG. 2C is a diagram for explaining a joint structure between a column of the pattern 3 and a column beam joint. As shown in the figure, the PC member 73 includes a joint portion 73A and a beam portion 73B that constitutes a beam end portion connected to the joint portion 73A, and the PC member 73 is vertically moved to a position corresponding to the joint portion 73A. A sheath tube 74 is provided to extend in the direction. The column 70 is made of a PC member or cast-in-place concrete, and includes a column main bar 71 embedded so as to extend in the vertical direction, and a sleeve joint 72 connected to the upper end of the column main bar 71 and exposed on the upper surface of the column.

  When connecting the column 70 and the joint portion 73 </ b> A, the PC member 73 is built in the upper part of the column 70, and the tip is inserted into the sheath tube 74 of the PC member 73 and into the sleeve joint 72 of the column 70. Thus, the joining reinforcing bar 75 is inserted. Then, grout is filled in the sheath tube 74, the sleeve joint 72, and the joint between the PC member 73 and the column 70. As the filled grout is cured, the PC member 73 and the column 70 constituting the joint portion 73A are joined.

  Moreover, in the construction method of the beam-column joint of the present embodiment, any one of the following three methods of connecting the beam and the beam-column joint is used.

<Pattern A>
FIG. 3A is a diagram for explaining a joint structure between a beam of a pattern A and a column beam joint. As shown in the figure, the PC member 83 constitutes a beam end portion connected to the joint portion 80B. The PC member 83 has a beam main bar 84 embedded in the horizontal direction and protruding from the joint end surface. Prepare. Further, the column 80A and the joint portion 80B are made of a PC member or a cast-in-place concrete, and are connected to the beam main reinforcement 81 embedded in the joint portion 80B so as to extend in the horizontal direction, and exposed to the joint end surface. And a sleeve joint 82.

  When connecting a beam to the joint 80B, the PC member 83 is moved in the horizontal direction so that the protruding portion of the beam main bar 84 of the PC member 83 is inserted into the sleeve joint 82 of the joint 80B. Let me build. Then, grout is filled in the sleeve joint 82 and the joint between the PC member 83 and the joint portion 80B. The filling portion 80B and the PC member 83 constituting the beam are joined by curing the filled grout.

<Pattern B>
FIG. 3B is a diagram for explaining a joint structure between the beam of the pattern B and the column beam joint. As shown in the figure, the PC member 87 constitutes an end portion of the beam connected to the joint portion 85B, and is connected to the beam main reinforcement 88 embedded in the horizontal direction and the beam main reinforcement 88. And a sleeve joint 89 exposed at the joining end face. The column 85A and the joint portion 85B are made of a PC member or cast-in-place concrete, and include a beam main bar 86 that extends in the horizontal direction and has an end protruding from the joint end surface.

  When the PC member 87 constituting the beam is connected to the column beam joint portion 85B, the PC portion 87B is inserted into the sleeve joint 89 of the PC member 87 so that the protruding portion of the beam main bar 86 is inserted into the PC member 87. The member 87 is moved in the horizontal direction and built. Then, grout is filled in the sleeve joint 89 and the joint between the PC member 87 and the joint portion 85B. The filling portion 85B and the PC member 87 constituting the beam are joined by curing the filled grout.

<Pattern C>
FIG. 3C is a diagram for explaining a joint structure between the beam of the pattern C and the column beam joint. As shown in the figure, the PC member 92 constitutes the end portion of the beam connected to the joint portion 90B, and is connected to the beam main bar 93 embedded in the horizontal direction and the beam main bar 93. And a sleeve joint 94 exposed at the joining end face. Further, the column 90A and the joint portion 90B are made of a PC member or cast-in-place concrete, and include a sheath tube 91 that penetrates the joint portion 90B in the horizontal direction.

  When the PC member 92 constituting the beam is connected to the joint portion 90B, the PC member 92 is built on the side of the column beam joint 90B, and the tip of the PC member 92 is placed in the sheath tube 91 of the column beam joint 90B. The joining reinforcing bar 95 is inserted so as to be inserted into the sleeve joint 94 of the member 92.

  Then, grout is filled in the sheath tube 91, the sleeve joint 94, and the joint between the PC member 92 and the column. The filling portion 90B and the PC member 92 constituting the beam are joined by hardening the filled grout.

  In the present embodiment, any one of the above-described patterns 1 to 3 and patterns A to C, or the column-beam joint and the beam are configured by separate PC members, and the column and the beam-column joint Are joined by any method of patterns 1 to 3, and the beam-to-column joint and the beam are joined by any method of patterns A to C to construct a beam-to-beam joint at the viaduct.

Hereinafter, a method for constructing the viaduct described with reference to FIGS. 1A to 1C will be described.
4A to 4K are views for explaining a method for constructing a viaduct according to the present embodiment. In each figure, (B) is a plan view, and (A) is a cross-sectional view taken along line AA in (B).

  First, as shown in FIG. 4A, the pile 201 is placed on the ground, the pressure plate 202 is constructed so as to be integrated with the head of the pile 201, and the foundation structure 20 is constructed. And the pillar 30 is constructed | assembled on the upper part of the foundation structure 20. As shown in FIG. The column 30 includes a column main bar 302 embedded in the concrete member 301 and a sleeve joint 303 connected to the upper end of the column main bar 302, and an end of the sleeve joint 303 is exposed on the upper surface of the column 30. The pillar 30 may be constructed using a PC member or may be constructed on site.

  Next, as shown in FIG. 4B, a PC beam member 400 constituting the B-1 column beam joint and the B-1 side end of the B-way 1-2 beam is installed. As shown in the figure, the PC beam member 400 includes a concrete main body 401 made of a PC member, a first beam main reinforcement 411 embedded in the concrete main body 401 so as to extend in the left-right direction in FIG. A sleeve joint 412 connected to the two end portions of the beam main bar 411 and a second beam main bar 421 embedded in the column beam connection part in the concrete main body 401 so as to extend vertically in FIG. 4B (B). A sleeve joint 422 connected to the end of the second beam main reinforcing bar 421 on the A street side, a column main reinforcing bar 431 embedded in a portion corresponding to the column beam connecting portion of the concrete main body 401 so as to protrude from below, Is provided. Then, the PC beam member 400 is built by moving the PC beam member 400 downward from above so that a portion protruding from below the column main reinforcement 431 is inserted into the sleeve joint 303 exposed at the upper end of the column 30. Then, grout is filled in the sleeve joint 303 embedded in the upper part of the column 30 and between the column 30 and the PC beam member 400.

  Next, as shown in FIG. 4C, a pair of PC beam members 450 and 460 constituting the beam 40 between one type of AB are built. These PC beam members 450 and 460 are embedded in concrete bodies 451 and 461 made of PC members, and are embedded in the concrete bodies 451 and 461 so as to extend in the vertical direction in FIG. 4C (B). Beam main bars 452 and 462 projecting from the end surfaces of the main bodies 451 and 461, and sleeve joints 453 and 463 connected to the ends of the beam main bars 452 and 462 on the A side. First, the PC beam member 450 is built by moving in the horizontal direction so that the protruding portion of the beam main bar 452 is inserted into the sleeve joint 422 connected to the second beam main bar 421 of the PC beam member 400. . Next, the PC beam member 460 is built by moving in the horizontal direction so that the protruding portion of the beam main bar 462 is inserted into the sleeve joint 453 exposed at the end of the PC beam member 450 on the A street side. Include. Then, grout is filled in the sleeve joints 453 and 463 and between the PC members 400, 450 and 460.

  Here, it is necessary to support the PC beam members 450 and 460 until the grout is cured and the PC members are connected to each other. In the present embodiment, the PC beam members 450 and 460 are supported by a support frame described below.

  5A to 5D are views showing a support frame 800 that supports the PC beam members 450 and 460, FIG. 5A is a vertical sectional view of one kind, FIG. 5B is a view taken along the line BB ′ in FIG. 5C is a CC ′ arrow view in FIG. 5A, and FIG. 5D is a DD ′ arrow view in FIG. 5A. As shown in FIGS. 5A to 5D, the support frame 800 includes an attachment beam 810 fixed to the column 30 by anchor bolts 811, a support column 820 connected upward in the vicinity of both ends of the installation beam 810, and FIG. And a long bolt 850 attached so as to extend downward from the cross beam 830 in the vicinity of the end portion on the joining side of the PC beam members 450 and 460, extending over the column 820 so as to extend in the left-right direction. And a receiving girder 840 that is attached to the lower end of the long bolt 850 so as to extend in the left-right direction in FIG. 5C and supports the PC beam members 450 and 460 from below. The loads of the PC beam members 450 and 460 are transmitted from the receiving beam 840 to the cross beam 830 through the long bolt 850, and further transmitted from the cross beam 830 to the column 30 through the column 820. With this configuration, it is possible to support without placing a support member on the ground below the PC beam members 450 and 460, and it does not hinder the travel of the railway passing under the viaduct 10.

  Next, as shown in FIG. 4D, a PC beam member 500 that constitutes the A-side end portion of the beam between the A-1 column beam joint and the A-way 1-2 beam is installed. The PC beam member 500 includes a concrete main body 501 made of a PC member, a first beam main bar 511 embedded in the concrete main body 501 so as to extend in the left-right direction in FIG. 4D, and a first beam main bar 511. A sleeve joint 512 connected to the end of the tube, a sheath tube 521 embedded in the column beam connecting portion so as to penetrate in the vertical direction in FIG. 4D (B), and a portion corresponding to the column beam joint portion of the concrete body 501; Column main reinforcement 531 embedded so as to protrude from below. The PC beam member is built by moving downward from above so that the portion protruding from below the column main reinforcement 531 is inserted into the sleeve joint 303 exposed at the upper end of the column 30.

  Next, as shown in FIG. 4E, the connecting reinforcing bars are arranged so that the tip reaches the sleeve joint 463 of the built-in PC beam member 460 from the side of the viaduct 10 in the sheath tube 521 of the PC beam member 500. 522 is inserted. Then, the grout is filled between the sleeve joint 463, the PC beam members 500 and 460, and the sheath tube 521.

  Next, as shown in FIG. 4F, the PC beam members 550 and 560 constituting the intermediate portion of the A-way and B-way 1-2 beams are moved in the horizontal direction and built. The PC beam members 550 and 560 are respectively embedded in concrete bodies 551 and 561 made of PC members, and are embedded in the concrete bodies 551 and 561 so as to extend in the left-right direction in FIG. 4F (B). Beam main bars 552 and 562 projecting from the end surfaces of the concrete main bodies 551 and 561, and sleeve joints 553 and 563 connected to the two ends of the beam main bars 552 and 562 are provided. The PC beam members 550 and 560 are inserted so that the protruding portions of the beam main bars 552 and 562 are inserted into the sleeve joints 412 and 512 connected to the first beam main bars 411 and 511 of the PC beam members 400 and 500. Move horizontally to build. At this time, the built-in PC beam members 550 and 560 are supported by standing a temporary support member extending in the vertical direction between the PC beam members 550 and 560 and the ground. Then, grout is filled between the sleeve joints 412 and 512 and the PC beam members 400, 500, 550 and 560.

  Next, as shown in FIG. 4G, the PC beam member 600 constituting the B-side end of the B-2 column beam joint and the B-way 1-2 and 2-3 beams is horizontally placed. Move in the direction and build. The PC beam member 600 is embedded in a concrete main body 601 made of a PC member, and extends in the left-right direction in FIGS. 4G (A) and (B) in the concrete main body 601, and one end of each side is the end surface of the concrete main body 601. The first beam main reinforcing bar 611 protruding from the first beam main reinforcing bar 611, the first sleeve joint 612 connected to the three ends of the first beam main reinforcing bar 611, and a position corresponding to the column beam connecting portion in the concrete body 601 4G (B), the second beam main reinforcing bar 621 embedded in the vertical direction, the second sleeve joint 622 connected to the end of the second beam main reinforcing bar 621 on the A side, and the column beam of the concrete main body 601 And a sheath tube 631 embedded in a portion corresponding to the joint portion so as to penetrate in the vertical direction. The PC beam member 600 has an inner portion of a sleeve joint 553 in which the protruding portion of the first beam main bar 611 is connected to the beam main bar 552 of the PC beam member 550 constituting the intermediate portion of the B-way 1-2 beam. Move to the horizontal direction so that it will be inserted into.

  Next, as shown in FIG. 4H, the connecting rebar 632 is inserted into the sheath pipe 631 of the PC beam member 600 from above so that the tip reaches the sleeve joint 303 connected to the upper end of the column main bar 302 of the column 30. insert. Then, grout is filled between the sleeve joint 303 and the PC members 600 and 550 and the sheath tube 631.

  Next, as shown in FIG. 4I, a pair of PC beam members 650 and 660 constituting a beam between two types of A-B are built. The PC beam members 650 and 660 are embedded in the concrete main bodies 651 and 661 so as to extend in the vertical direction in FIG. 4I (B) in the concrete main bodies 651 and 661. Beam main bars 652 and 662 projecting from the end surfaces, and sleeve joints 653 and 663 connected to the end portions of the beam main bars 652 and 662 on the A street side are provided. First, the PC beam member 650 is horizontally moved so that the protruding portion of the beam main bar 652 is inserted into the sleeve joint 622 connected to the second beam main bar 621 of the PC beam member 600. Move and build. Next, the PC beam member 660 is moved and built in the horizontal direction so as to be inserted into the sleeve joint 653 exposed at the end of the A beam side of the built-in PC beam member 650. Then, grout is filled in the sleeve joints 622 and 653 and between the PC members 600, 650 and 660. At this time, the PC beam members 650 and 660 may be supported by the support frame 800 described with reference to FIGS. 5A to 5D.

  Next, as shown in FIG. 4J, the PC beam member 700 constituting the end of the B street side of the A-2 column beam joint and the A street 1-2 street and the 2-3 street beams is horizontally placed. Move in the direction and build. The PC beam member 700 is embedded in a concrete main body 701 made of a PC member and extending in the left-right direction in FIGS. 4J (A) and 4 (B) in the concrete main body 701, and one end portion of the PC beam member 700 is an end surface of the concrete main body 701. 4J (B) in the vertical direction in FIG. 4J (B) at a position corresponding to the beam beam reinforcement 711 protruding from the sleeve, the sleeve joint 712 connected to the two ends of the beam reinforcement 711, and the column beam connection in the concrete body 701. A first sheath tube 721 embedded so as to penetrate therethrough and a second sheath tube 731 embedded so as to penetrate vertically in a portion corresponding to the column beam joint portion of the concrete main body 701 are provided. The PC beam member 700 is inserted so that the protruding portion of the beam main bar 711 is inserted into the sleeve joint 563 connected to the beam main bar 562 of the PC beam member 560 constituting the A-way 1-2 beam. Move horizontally to build.

  Next, as shown in FIG. 4K, the connecting rebar 732 so that the tip reaches the inside of the sleeve joint 303 connected to the column main bar 302 of the column 30 from above the PC beam member 700 into the second sheath tube 731. Insert. Further, the connecting reinforcing bar 722 is reached from the side of the viaduct 10 into the first sheath tube 721 so as to reach the sleeve joint 663 connected to the beam main bar 662 of the PC beam member 660 constituting the two beams. Insert. Then, the grout is filled between the sleeve joints 563 and 663, the PC members 560, 660, and 700 and the sheath tubes 721 and 731.

And the PC slab member which comprises a slab is built in the upper part of the beam 40 so that it may be supported by the built beam 40 mentioned above.
By repeating the above-described steps, a high bridge can be continuously constructed.

  According to this embodiment, the viaduct 10 can be constructed without placing concrete on site. For this reason, while being able to reduce the effort concerning the construction in a field, a construction period can be shortened.

  In addition, when concrete is placed on site, the quality is not stable, but since the joint can be manufactured in the factory, the quality can be stabilized.

  Further, the viaduct 10 has a wide span, so a support structure is required. However, if the support structure is provided below the beam, it will hinder the transportation of the railway below. On the other hand, in this embodiment, since the support frame 800 is configured to support the PC beam member by applying a reaction force to the pillar 30, the construction can be performed without hindering the traffic of the lower railway.

  In this embodiment, the beams of each span between A and B are configured by connecting two PC beam members, and the beams of each span between 1 and 3 are connected to the column beam joint and both sides thereof. Although it is configured by connecting the PC beam member in which the end portions of the beam are integrated with the PC beam member constituting the central portion of the beam, the beam dividing method is not limited to this.

  For example, the beams of each span may be configured by connecting three or more PC beam members, or the column beam joint and the ends of the three beams connected to the column beam joint are integrated. The PC beam member thus formed may be used, or a PC member constituting only the column beam joint may be used. In short, the dividing method may be determined in consideration of workability as appropriate.

  Further, in this embodiment, the PC beam members constituting the beams of each span between 1 to 3 are supported by the support member from below, but not limited to this, the beams between A to B are configured. Similar to the PC beam member, the column may be supported by applying a reaction force.

  In the present embodiment, the PC member and the column including the beam-column joint portion are joined by the pattern 1 and the pattern 3 among the patterns 1 to 3 described above. Alternatively, the column and the beam-to-column joint may be constructed integrally, and the column-beam joint and the PC member constituting the beam may be joined by any one of the patterns A to C.

  In the present embodiment, the PC member and the column including the column beam joint portion are joined by the pattern A and the pattern C among the patterns A to C. However, the present invention is not limited to this, and the pattern B is joined by the method of the pattern B. Also good.

DESCRIPTION OF SYMBOLS 10 Viaduct 20 Base structure 30 Column 40 Beam 50 Slab 60, 65, 70, 80A, 85A, 90A Column 61, 64, 66, 68, 71 Column main reinforcement 62, 69, 72, 82, 89, 94 Sleeve joint 63, 67 , 73, 83, 87, 92 PC member 63A, 67A, 73A, 80B, 85B, 90B Joint portion 63B, 67B, 73B Beam 74, 91A Sheath tube 75, 95 Bonded reinforcing bar 81, 84, 86, 88, 93 Beam Main bar 201 Pile 202 Pressure resistant panel 301 Concrete member 302 Column main bar 303 Sleeve joint 400, 450, 460 PC member 500, 550, 560 PC member 600, 650, 660, 700 PC member 401, 451, 501, 551, 601, 651, 701 Concrete body 411, 421, 452, 462 Beam main bars 511, 552, 5 2 Beam main bars 611, 621, 652, 662, 711 Beam main bars 412, 422, 453, 463 Sleeve joints 512, 553, 563 Sleeve joints 612, 622, 653, 663, 712 Sleeve joints 431, 531 Column main bars 521, 631, 721, 731 Sheath tube 522, 632, 722, 732 Connection reinforcing bar 800 Support frame 810 Mounting girder 811 Anchor bolt 820 Post 830 Horizontal girder 840 Receiving girder 850 Long bolt

Claims (7)

A method for constructing a beam-column joint in which columns and beams constituting a viaduct are joined,
A sleeve joint is connected to the column main reinforcement of the column, and the sleeve joint is exposed on the upper surface of the column,
A first PC member comprising at least the column-beam joint, a through-hole extending in the vertical direction, a beam main bar extending in the horizontal direction, and a sleeve joint connected to the beam main bar and exposed to the side of the member Is built on top of the pillar,
Inserting a connecting rebar into the through hole of the first PC member so that the tip is inserted into the sleeve joint of the column,
A second PC member comprising a beam main bar constituting the beam and having a tip protruding from a side surface is horizontally arranged so that a protruding portion of the beam main bar is inserted into a sleeve joint of the first PC member. Move in the direction and build,
In the method of filling grout in the through hole of the first PC member and in the sleeve joint of the column and the first PC member,
A method for constructing a viaduct beam-to-column joint comprising providing a support frame for supporting the second PC member by taking a reaction force on the column. A method for constructing a beam-column joint in which columns and beams constituting a viaduct are joined,
A sleeve joint is connected to the column main reinforcement of the column, and the sleeve joint is exposed on the upper surface of the column,
A first PC member that comprises at least the column-beam joint and includes a through-hole extending in the vertical direction and a beam main bar extending in the horizontal direction and having a tip protruding from the side surface of the member is built on the upper portion of the column. Including
Inserting a connecting rebar into the through hole of the first PC member so that the tip is inserted into the sleeve joint of the column,
A second PC member comprising the beam main bar that constitutes the beam and extends in the horizontal direction and a sleeve joint that is connected to the beam main bar and exposed on the side of the member is used as a protrusion of the beam main bar of the first PC member. So that the part to be inserted is inserted into the sleeve joint of the second PC member, and moved in the horizontal direction,
In the method of filling grout in the through hole of the first PC member and in the sleeve joint of the first and second PC members,
A method for constructing a viaduct beam-to-column joint comprising providing a support frame for supporting the second PC member by taking a reaction force on the column. A method for constructing a beam-column joint in which columns and beams constituting a viaduct are joined,
A sleeve joint is connected to the column main reinforcement of the column, and the sleeve joint is exposed on the upper surface of the column,
A first PC member comprising at least the column beam joint and protruding from the lower surface and a through-hole penetrating in the horizontal direction is provided. The protruding portion of the column beam is the sleeve of the column. Move it vertically so that it can be inserted into the joint,
A second PC member comprising the beam main bar and a sleeve joint that is connected to the beam main bar and exposed on the side surface of the member is built on the side of the first PC member.
Inserting a connecting rebar into the through hole of the first PC member so that the tip is inserted into the sleeve joint of the second PC member,
In the method of filling the grout in the through hole of the first PC member, the sleeve and the sleeve joint of the second PC member,
A method for constructing a viaduct beam-to-column joint comprising providing a support frame for supporting the second PC member by taking a reaction force on the column. A method for constructing a beam-column joint in which columns and beams constituting a viaduct are joined,
The column main reinforcement of the column is protruded from the upper surface,
A first PC comprising at least the column beam joints extending in the vertical direction, a sleeve joint that is connected to the column main bars and exposed on the lower surface of the member, and a through hole that penetrates in the horizontal direction. The member is built by moving in the vertical direction so that the protruding portion of the column main bar of the column is inserted into the sleeve joint,
A second PC member comprising the beam main bar and a sleeve joint that is connected to the beam main bar and exposed on the side surface of the member is built on the side of the first PC member.
Inserting a connecting rebar into the through hole of the first PC member so that the tip is inserted into the sleeve joint of the second PC member,
In the method of filling grout into the through hole of the first PC member and the sleeve joint of the first and second PC members,
A method for constructing a viaduct beam-to-column joint comprising providing a support frame for supporting the second PC member by taking a reaction force on the column. A method for constructing a beam-column joint in which columns and beams constituting a viaduct are joined,
A sleeve joint is connected to the column main reinforcement of the column, and the sleeve joint is exposed on the upper surface of the column,
A first PC member that comprises at least the first column-beam joint and includes a first through hole extending in the vertical direction and a second through hole penetrating in the horizontal direction is built in the upper portion of the column. ,
A connecting rebar is inserted into the first through hole of the first PC member so that a tip is inserted into the sleeve joint of the column;
A second PC member comprising the beam main bar and a sleeve joint that is connected to the beam main bar and exposed on the side surface of the member is built on the side of the first PC member.
Inserting a connecting rebar into the second through hole of the first PC member so that the tip is inserted into the sleeve joint of the second PC member;
In the method of filling grout in the first and second through holes of the first PC member and in the sleeve joint of the pillar and the first PC member,
A method for constructing a viaduct beam-to-column joint comprising providing a support frame for supporting the second PC member by taking a reaction force on the column. A method for constructing a beam-column joint in which columns and beams constituting a viaduct are joined,
While constructing the column and beam-column joint, a through-hole penetrating in the horizontal direction is provided in the beam-column joint,
The beam is constituted, and a PC member provided with a beam main bar and a sleeve joint that is connected to the beam main bar and is exposed on the side surface of the member is built on the side of the column beam connection part,
Insert a connecting rebar into the through hole of the beam-column joint so that the tip is inserted into the sleeve joint of the PC member,
In the method of filling the grout in the through hole of the beam-column joint and the sleeve joint of the PC member,
A method for constructing a viaduct beam-to-column joint comprising providing a support frame for supporting the PC member by taking a reaction force on the column.   A viaduct in which a beam-column joint is constructed by the method according to any one of claims 1 to 6.

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