JPH0941324A - Piling up steel-made frame of bridge pier hoop tie and assembling method of bridge pier hoop tie - Google Patents

Abstract

PROBLEM TO BE SOLVED: To pile up bridge hoop ties per classification on a steel-made frame and facilitate hanging by slinging and a crane. SOLUTION: In a steel-made frame for piling up bridge pier hoop ties which pile up bride pier hoop ties 1 and 2, which are substantially L-shaped and envelop a semicircle area around bridge main reinforcements laid out along each side which forms a substantially rectangular shape, there is provided a frame member 11, which arranges steel materials (angle materials) 12 and 13 in a double cross by twos horizontally and vertically and fixes each other and loads bride pier hoop ties, which are substantially J-shaped, on the top. There are provided reinforcement support members 14 and 16 (support rods by the angle materials), which support from the lateral sides the bridge pier hoop ties 1 and 2, which are erectly provided on a spot to each of both ends symmetrically and piled up on the frame member 11 in the form of substantially J shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel frame for stacking pier straps and a method for assembling pier straps using the steel frame.

[0002]

2. Description of the Related Art In the work of assembling a pillar rebar of a pier, after arranging the pillar main bars along each side of the rectangular shape and standing it up, firstly, a strip reinforcing bar surrounding the pillar main bars is surrounded by a substantially rectangular shape. The parts are arranged alternately so as to surround the part. Then, vertical strip reinforcing bars that connect the long side portions of the rectangular shape in which the column main bars are arranged at the intermediate portion are arranged at a plurality of locations. Furthermore, longitudinal strips that connect the long sides along the short sides are also arranged on both short sides, and also between the short sides of the rectangular shape along the long sides. The horizontal strips that connect the bars are arranged on both long sides.

[0003]

As described above, in the work for assembling the pillar rebar of the pier, the work for assembling the band reinforcement is a work for alternately arranging the length and width directions of the band reinforcement. As for the labor and work time required for the construction, it is considerably laborious and requires a long time as compared with the ordinary column reinforcing bar assembling work in general construction.

Therefore, an object of the present invention is to provide a steel frame for stacking pier strap reinforcements by stacking the pier strap reinforcements by type and facilitating slinging and hanging by a crane. . Then, the present invention also aims to provide an assembling method of a bridge pier for a bridge pier by using such a steel frame so as to shorten the working time and save labor in assembling the bridge reinforcing bar for a pier. .

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the invention according to claim 1 defines a periphery of a main pier for a pier, for example, a substantially half-circumferential portion, which is arranged along each side of a substantially rectangular shape. A steel frame for stacking pier strap reinforcements for stacking pier strap reinforcements that form an almost J-shape that surrounds each other, and fix each other by constructing two horizontal and vertical steel materials, for example, angle materials in a cross beam shape. And a frame member on which the J-shaped strip reinforcing bar having a substantially J shape is placed, and the steel members (angle members, etc.) assembled in the girder-like shape of the frame member are symmetrically arranged on both sides of the frame member. And a reinforcing bar supporting member for laterally supporting the substantially J-shaped strip reinforcing bars stacked on the frame member, for example, a pillar rod made of an angle member.

As described above, the reinforcing bar supporting members are symmetrically provided on the respective end portions of the steel members assembled in a cross girder shape which form a frame member in which two vertical and horizontal steel members are assembled and fixed to each other. Since it is a steel frame for stacking pier rebars, the pier rebars that surround the main reinforcement of the pier pillars are arranged along each side of the rectangular shape on the steel girder-shaped frame member. Can be supported from the side by the reinforcing bar supporting members symmetrically erected on the parts of the steel members assembled in a cross girder pattern around the ends of the stacked reinforcing bars for bridge piers. Therefore, by using the steel frame for stacking the pier strap reinforcements, in the state where the pier strap reinforcements that surround the perimeter of the pier column main reinforcements arranged along each side of the substantially rectangular shape are stacked,
It will be easier to hang it with slings and cranes, and it will also be possible to suspend the steel frame for stacking the pier belt reinforcement vertically and temporarily place it on the scaffold. In addition, by using the steel frame for stacking the above-mentioned pier strap reinforcements, the pier strap reinforcements that surround the perimeter of the pier column main reinforcements that are arranged along each side of the rectangular shape can be stacked or alternated by type. It is also possible to superimpose on.

According to the second aspect of the present invention, the periphery of the main reinforcement for the pier, which is arranged along each side of the substantially rectangular shape, for example, the pier belt reinforcement that encloses a substantially half-circumferential portion, and the inward longitudinal and lateral directions. A method for assembling a pier strap reinforcing bar for connecting to a pier, comprising: a first preparing step, a tacking step, a second preparing step, a first assembling step, a second assembling step, It is characterized by a process sequence consisting of a third assembly process. First, in the first preparing step, the bridge rebars that connect the insides of the main pier columns to the longitudinal and lateral directions are temporarily placed on a scaffold surrounding the main pier columns. Subsequently, in the temporary attaching step, a plurality of pier strap reinforcements connecting the long side portions of the rectangular shape where the column main reinforcements for bridges are arranged at an intermediate portion, that is, for a longitudinal pier having a substantially U shape Temporarily attach the reinforcing bar to the upper part of the main bar of the pier. 2. The stacking of the pier rebars according to claim 1, wherein in the second preparatory step, the pier rebars having a substantially J-shape that surrounds an approximately half circumference of the pier column main rebar are stacked in advance. The steel frame for use is slung and vertically hung by a crane, and temporarily placed on the scaffolds on both sides of the rectangle in which the main pillars for the pier are arranged.

In the first assembling step, the steel piers for bridge piers are formed into a substantially J-shape from a steel frame for stacking the pier straps that have been temporarily placed vertically on the scaffolds on both sides. Are laid down side by side, and alternately attached and fixed to approximately half-circumferences around the main reinforcement of the pier column. In the next second assembling step, the plurality of pier strap reinforcements (almost U-shaped vertical pier straps) temporarily attached to the upper part of the pier column main bar are lowered to be used for the pier. It is fixed at the middle part between the long sides of the main pillars. In the final third assembly step,
A plurality of pier strap rebars that connect the long sides of the main pier columns to each other along the short sides, that is, the substantially linear vertical pier straps are fixed at both short sides. With
A plurality of pier strap rebars that connect the short sides of the main pier columns to each other along the long sides, that is, the substantially straight lateral pier straps are fixed on both long sides. .

As described above, the pier strap reinforcements that connect the insides of the pier column main bars in the vertical and horizontal directions are temporarily placed on the scaffold, and the long sides of the rectangular shape in which the pier column main bars are arranged are intermediate. The plurality of pier strap reinforcements to be connected at a section are temporarily attached to the upper part of the pier post reinforcement, and then the pier reinforcements surrounding the pier post reinforcement are stacked in advance. Start the assembling work of the pier rebars with the steel frame for stacking the piers suspended vertically and temporarily placed on the scaffold on both sides of the rectangle with the main rebar columns installed. To do. That is, first, the steel frames for stacking the pier rebars that have been temporarily placed vertically on the scaffolds on both sides are laid horizontally around the pier rebars and fixed around the main pier columns. Then, lower the multiple pier strap reinforcements temporarily attached to the upper part of the main pier columns, and fix them at the middle part between the long sides of the main pier columns, and finally, for the pier columns. Along the short side, connect the long sides of the main reinforcement along the short side.Fix the pier strap reinforcements on both short sides and connect the short sides of the main pier columns to the long side. Since this is a method of assembling the pier strap reinforcements in which a plurality of pier strap reinforcements to be connected are fixed on both long side portions, the work time can be shortened and labor can be saved when assembling the pier strap reinforcements.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a method for assembling a steel frame for stacking pier strap reinforcement and a pier strap reinforcement according to the present invention will be described below with reference to FIGS. 1 to 3.

<Steel Steel Frame for Stacking Bridge Reinforcing Bars> First, FIG. 1 shows a steel frame for stacking pier belt reinforcing bars as an example to which the present invention is applied. A plan view and (b) are schematic side views of the usage state. 1 (a) and 1 (b), reference numerals 1 and 2 denote strip rebars surrounding the column main bars, 10 a steel frame for stacking pier rebar bars, 11 a frame member, 12 and 13 steel materials, 14 , 16 are reinforcing bar supporting members (supporting rods), and 15 and 17 are reinforcing plates.

The strip reinforcing bars 1 and 2 which surround the periphery of a column main bar (not shown) which is arranged along each side of a substantially rectangular shape for a pier,
It has a substantially J-shape that encloses a substantially half-circumferential portion around the main reinforcement of the pier column arranged along each side of the substantially rectangular shape. At both ends thereof, inward bending pieces 1a, 2a, 1b,
2b are respectively formed. In addition, this belt rebar 1,
2, the center-to-center length in the horizontal direction in the drawing (horizontal direction) is, for example, 3,730 mm, and the width in the vertical direction in the drawing (vertical direction) is, for example, 2,680 mm.

The steel frame 10 for stacking pier belt reinforcements is
As shown in FIGS. 1A and 1B, the reinforcing bar supporting members 14, 14,
14,14,14,14,14,14,16,16,1
6, 16 are provided upright. That is, the frame member 11
Is, for example, two long steel members 12, 12 and two short steel members 13, 13 made of an angle member having a size of 50 × 50 × 6 (mm) are assembled into a horizontal and vertical cross beam shape as shown in the drawing. They are fixed to each other by welding. Then, the steel members 12, 12, 1 assembled in the cross beam shape of the cross-shaped frame member 11 as described above.
A pair of reinforcing bar supporting members 14 and 14 and a reinforcing bar supporting member 16 which are spaced apart from each other by a predetermined distance are symmetrically provided on the portions of both sides of the coils 3 and 13, respectively.

The reinforcing bar supporting members 14 and 16 are, for example, supporting rods made of an angle member having a size of 50 × 50 × 6 (mm) like the steel members 12 and 13 and having a length (height) of, for example, 4 mm.
It is 00 mm. In the illustrated example, a pair of reinforcing bar support members 14 and 14 spaced at predetermined intervals are respectively fixed by welding on the portions of the long steel material 12 in the lateral direction near both ends, and the reinforcing bars are supported by the supporting rods of the angle material. Member 14,
Reinforcing plates 15 and 15 are fixed to both side portions of 14 and the steel material 12 by welding. In addition, a steel material with a short vertical direction 1
One reinforcing bar support member 16 is fixed by welding on the portions near both ends of 3, and the reinforcing plate 17 is welded to the outer side of the reinforcing bar support member 16 and the steel material 13 by the supporting rod of the angle member by welding. It is fixed.

Steel frame 1 for stacking the above-mentioned pier belt reinforcements
0, as shown in FIGS. 1 (a) and 1 (b),
A cross-shaped frame member 1 made of steel materials 12, 12, 13, and 13
One on which the J-shaped strip reinforcements 1 and 2 that surround the approximately half-circumference of the main pier column main bar arranged along each of the approximately rectangular sides described above can be sufficiently stacked. Has become. Then, a pair of reinforcing bar supporting members 14 and 1 erected on both side portions of the long steel material 12 in the lateral direction, respectively.
The bent bars 1a and 2a of the vertical bars and the ends of the strip rebars 1 and 2, which are substantially J-shaped, can be inserted between the four, respectively. Reinforcing bar support members 16 and 16 that are respectively erected on the portions near both ends
The illustrated horizontal bar portions of the band-shaped reinforcing bars 1 and 2, which are substantially J-shaped, respectively come into contact with the inside of the. Next, a method of assembling the pier strap reinforcements using the steel frame 10 for stacking pier strap reinforcements as described above will be described.

<Assembling Method of Bridge Reinforcing Bars for Bridge Piers> FIG. 2 is a plan view showing an assembled state of reinforcing bars by the method for assembling pier belt reinforcing bars as an example to which the present invention is applied. In FIG.
Similarly to the above, 1 and 2 are strip rebars having a substantially J-shape that surrounds a semi-circumferential portion around the column main bar, and 3 and 4 are vertical rebars that connect the long side portions at the intermediate portion. A vertical strip rebar connecting the long side portions along the short side portion side, and a horizontal strip rebar 6 connecting the short side portions along the long side portion side.

That is, the strip rebars 1 and 2 having a substantially J-shape
As shown in FIG. 3 (a), are attached so as to enclose approximately half of the circumference of the main reinforcement of the pier column arranged along each side of the substantially rectangular shape. On the side of the bent pieces 1a, 2a at the ends of the bent pieces, the bent pieces 1b, 2b at the other ends that are shorter in the lateral direction are arranged. Further, as shown in FIG. 3 (b), the vertical reinforcing bars 3 and 4 connecting the long side portions of the main reinforcements for the piers arranged along each side of the substantially rectangular shape are almost as shown in FIG. It has a U-shape, and inwardly bent pieces 3 are formed on both ends of the fork.
It has a, 3a, 4a, 4a together. Such vertical U-shaped strip reinforcing bars 3 and 4 are arranged so that the bending pieces 3a and 3a and the bending pieces 4a and 4a are directed in mutually opposite directions, so that the inside of the column main bar for the pier is It is attached to the left and right of the middle part.

The longitudinal strips 5 connecting the long side portions of the main pier column reinforcements arranged along the substantially rectangular sides along the short side portions are shown in FIG. 3 (c). As shown, it has a substantially linear shape, and has short bent pieces 5a, 5a on one side at both ends thereof. Such vertical strip reinforcing bars 5 having a substantially linear shape are attached along both inward left and right sides (short sides) of the pier column main bar so that the bent pieces 5a, 5a face each other. To be Further, a lateral strip reinforcing bar 6 that connects the short side portions of the main reinforcements for the piers arranged along the substantially rectangular sides along the long side portion 6
As shown in FIG. 4 (d), is a long straight line and has short bent pieces 6a, 6a at both ends thereof.
have. Such a laterally long strip-shaped reinforcing bar 6 having a substantially linear shape is arranged along the inner front and rear side portions (long side portions) of the main pillar reinforcement for the pier so that the bent pieces 6a, 6a face each other. It is attached.

Next, the above-mentioned pier belt reinforcements 1, 2, 3,
The method of assembling 4, 5, and 6 will be described step by step. "First preparation step" First, the pier belt reinforcements 3, 4, 5 and 6 that connect the inside of the pier column main bars arranged along each side of the substantially rectangular shape in the vertical and horizontal directions Each of them is temporarily placed on a scaffold (not shown) that surrounds the circumference of each of them in an amount sufficient for assembly work. "Temporary attaching process" Subsequently, a substantially U-shaped longitudinal direction connecting the long side portions of the rectangular shape where the main reinforcements for the piers are arranged along each side of the substantially rectangular shape with an intermediate portion. Temporarily attach the pier strap reinforcements 3 and 4 to the upper part of the pier column main reinforcement (see Fig. 2).

[Second Preparation Step] Then, the pier strap rebars 1 and 2 each having a substantially J shape surrounding a substantially half circumference part of the main reinforcement of the pier column arranged along each side of the substantially rectangular shape. ,
The steel frames 10 for stacking the steel bars for the bridge piers, which have been stacked in advance, are respectively slid on the frame members 11 and 11 and vertically hung by a crane (not shown) to arrange the main pillars for the piers. Temporarily place each on the left and right scaffolds. First preparation step, temporary attachment step, second
After the preparation process, the assembly work as described below is performed.

[First Assembly Step] First, in the above-mentioned second preparation step, the steel frames 10 and 1 for stacking the pier strap reinforcements temporarily placed vertically on the scaffolds on the left and right sides respectively.
Alternately lay down the pier strap rebars 1 and 2 that are almost J-shaped from 0, and as shown in FIG. 2, in the approximately half-circumference around the main pier columns, the piers that are almost J-shaped. The belt reinforcing bars 1 and 2 are attached alternately and fixed by welding. [Second Assembly Step] Then, in the above-mentioned temporary attaching step, the vertical U-shaped strip reinforcements 3 and 4 having a substantially U shape temporarily attached to the upper part of the main reinforcement for the pier are lowered to As shown in Fig. 4, the bending pieces 3a, 3a and the bending pieces 4a, 4a are oriented in opposite directions to each other between the long side portions of the main pillars for the piers on the left and right of the inner middle portion of the main bars for the piers. , U-shaped vertical pier strap reinforcements 3 and 4 are fixed by welding.

"Third Assembling Step" After that, FIG. 2 shows the vertical pier strap rebars 5 and 5 having a substantially straight line shape connecting the long side portions of the main pier column reinforcements along the short side portions. As shown in the figure, they are fixed by welding along the left and right short sides of the main pier column. Further, as shown in FIG. 2, long horizontal pier strap rebars 6, 6 that form a substantially straight line connecting the short side portions of the main pier column reinforcement along the long side are used as shown in FIG. It is fixed by welding along both the front and rear long sides.

From the above, the pier strap rebars 1, 2, 3,
One cycle assembly work of 4, 5, 6 is completed. After that, pier belt reinforcements 1, 2,
The assembling work of 3, 4, 5 and 6 is repeated to assemble at predetermined intervals according to the bar arrangement diagram not shown. As described above, according to the embodiment of the present invention, the pier strap reinforcement 1,
Since the steel frame 10 that can be stacked two by type and further stacked alternately can be manufactured, it can be easily slung by a sling and a crane. Band rebar 1, 2, 3, 4,
By improving the assembling methods of 5 and 6, it is possible to shorten the working time and save labor.

In the above embodiment, six types of pier strap rebars 1, 2, 3, 4, with respect to the assembling method are used.
Although 5 and 6 are used, the present invention is not limited to this, and more types of pier strap rebars may be used, or less types of pier strap rebars may be used. . Further, the shape of the steel reinforcement for the bridge pier, the shape of the stacking steel frame, and the like are arbitrary. For example, the steel material forming the frame member in the shape of a double girder is not limited to the angle material, and may be the C-shaped channel material or the like. Needless to say, it is possible to appropriately change specific detailed structures including specification dimensions.

[0025]

As described above, according to the steel frame for superimposing the pier strap reinforcements according to the invention of claim 1, the main pier columns for bridge piers are arranged along each side of a substantially rectangular shape. It becomes possible to easily hang slings and cranes while stacking the pier strap reinforcements surrounding the building, and suspend the steel frame for stacking pier strap reinforcements vertically to temporarily suspend it on the scaffolding. It will also be possible to leave it. Further, it becomes possible to stack the pier band reinforcements surrounding the main pier column bars arranged along each side of the substantially rectangular shape as described above by type or alternately stack them.

Further, according to the method for assembling the pier strap reinforcements according to the second aspect of the present invention, particularly, the steel for stacking the pier strap reinforcements that has been temporarily placed vertically on the scaffolds on both sides, respectively. Tilt the pier straps sideways from the frame and attach them around the pier column main reinforcements, and then fix each, then lower the multiple pier reinforcements temporarily attached to the top of the pier pillar reinforcements. After fixing each of the long sides of the main pier columns for the pier at the middle part, connect the long sides of the main pier columns for the pier along the short sides to connect the multiple pier strap reinforcements on both short sides. When assembling the pier rebars, the two main pier rebars that connect the short sides of the main pier columns to the pier columns are fixed along the long sides. The working time can be shortened and labor saving can be achieved.

[Brief description of drawings]

FIG. 1 shows a steel frame for stacking strip reinforcing bars for bridge piers as an example to which the present invention is applied, in which (a) is a plan view in a used state and (b) is a schematic side view in a used state.

FIG. 2 is a plan view showing an assembled state of reinforcing bars by a method of assembling pier strap reinforcing bars as an example to which the present invention is applied.

FIG. 3 is a schematic plan view showing types of strip reinforcing bars used in the assembly of FIG. 2, in which (a) shows strip reinforcing bars surrounding a column main bar arranged along each side of a rectangle; Similarly, (b) is a plan view of a vertical strip reinforcing bar that connects the rectangular long side portions where the column main bars are arranged at a plurality of intermediate portions, and (c) is the short side portion between the long side portions. FIG. 3D is a plan view of a vertical strip reinforcing bar connected along the vertical direction, and FIG. 7D is a plan view of a horizontal strip reinforcing bar connecting between the short sides of the rectangular shape along the long side.

[Explanation of symbols]

 1, 2 Reinforcing strips around the main bars 3, 4 Longitudinal strips connecting the long sides at the middle part 5 Longitudinal strips connecting the long sides along the short sides 6 Short sides Lateral strip reinforcing bars that connect parts along the long side 10 Steel frames for stacking strip reinforcing bars for piers 11 Frame members 12, 13 Steel materials 14, 16 Reinforcing bar support members (supporting rods) 15, 17 Reinforcing plates

Claims (2)

[Claims] 1. A steel frame for stacking pier belt reinforcements surrounding the main reinforcement of a pier arranged along each side of a substantially rectangular shape, the steel frame comprising two vertical and horizontal steel members. It is assembled in a cross beam and fixed to each other.
A frame member for mounting the strip rebar for the pier on the upper surface, and symmetrically erected on each of the both ends of the steel material assembled in the girder-like shape of the frame member, and stacked on the frame member. A steel frame for stacking pier belt reinforcements, comprising a reinforcing bar supporting member for laterally supporting the pier belt reinforcements. 2. A method for assembling a pier strap reinforcing bar surrounding a main pier column reinforcement arranged along each side of a substantially rectangular shape, and a pier strap reinforcing bar connecting the insides in the vertical and horizontal directions. A first preparation step of temporarily placing a pier strap reinforcing bar connecting the inside of the pier column main bar in the vertical and horizontal directions on a scaffold surrounding the pier column main bar, and arranging the pier column main bar A temporary attaching step of temporarily attaching a plurality of pier strap reinforcements connecting the long sides of the rectangular shape to the middle of the bridge pier, and for the pier surrounding the pier column main reinforcement The steel frame for stacking the pier rebars according to claim 1 in which the pier rebars have been stacked in advance, and the steel frames for vertically stacking the piers are hung vertically on the scaffolds on both sides of the rectangle in which the pillar main bars for the pier are arranged The second preparatory step to set it up, and the temporary placement vertically on the scaffolds on both sides. A first assembling step of tilting the pier straps horizontally from the steel frame for stacking the pier straps that has been set aside and alternately attaching and fixing them around the pier column main bars, and the pier column A second assembling step of lowering the plurality of pier strap reinforcements temporarily attached to the upper part of the main reinforcement and fixing the piers at the intermediate portion between the long sides of the pier main reinforcement, and the length of the pier main reinforcement. A plurality of pier strap reinforcements that connect the sides along the short sides are fixed on both short sides, respectively, and a plurality of the short bars between the main pier columns are connected along the long sides. And a third assembling step of fixing the pier strap reinforcing bars on both sides of the long sides, respectively, and a method of assembling the pier strap reinforcing bars.