JP4321872B2 - Girder block and steel bridge erection method using the girder block - Google Patents

Description

  The present invention relates to a girder block used when a steel bridge is erected and a steel bridge erection method using the girder block.

Steel bridges, for example, girder bridges (plate garter bridges) use steel main girders having an I-shaped cross section, for example, main girders 1a, 1b, 1c arranged in parallel as shown in FIG. It has a structure in which steel transverse members such as the anti-tilt structures 2a and 2b, the intermediate anti-tilt structures 3a, 3b, 3c, 3d, 3e, and 3f, and the distribution transverse beams 4a and 4b are connected. The crane vent method is known as a general construction method of such a girder bridge (for example, refer nonpatent literature 1). As shown in FIG. 2, the crane vent method includes a girder component C (main girder erection block, a substructure of the abutment 10 and the piers 11 and 12, and the vents 13 and 14 installed between the piers 11 and 12. 1 and horizontal members such as a tilting structure and a distribution girder) are sequentially lifted and installed by a crane 20 for installing a girder, and these girder components C are connected by high-strength bolts, welding, etc. The bridge will be assembled. In addition, the vents 13 and 14 are removed after completion of the assembly of the girder bridge.
“Easy-to-understand steel bridge construction” Japan Bridge Construction Association March 1997, p1-p7

  By the way, in the steel bridge erection method according to the crane vent method, in general, a main girder erection block of a predetermined length and a transverse member (an anti-tilt structure, a distribution girder, etc.) to constitute the main girder 1a (1b, 1c) are respectively provided. It is individually lifted and installed and assembled on the girder support structure (abutment 10, piers 11, 12, vents 13, 14). For this reason, the work on the girder support structure cannot always be efficiently performed. The main girder erection block refers to a member of a main girder having a predetermined length that is lifted on the girder support structure at once by an erection crane. Main girder members manufactured in factories with dimensions in consideration of restrictions in transportation are connected individually (in many cases, on a plurality of grounds) to form main girder erection blocks.

  For example, in the process of installing a steel bridge, there is a situation where the main girder erection block is placed on the girder support structure as a single unit, but the main girder erection block that is placed alone falls sideways and buckles. Since there is a risk of causing this, it is often difficult to lengthen the main girder erection block, and thus to increase the interval between the girder support structures (including the vent). Therefore, the number of main girder erection blocks and the number of vent installation bases necessary for laying steel bridges of a predetermined length are increased, and the main girder erection block is lifted, connected on the girder support structure, and further vented. Efficient work is difficult due to the increased amount of work required for installation and removal.

  In addition, a relatively laborious positioning work is required when a horizontal member lifted by a construction crane after the main girder construction block is placed on the girder support structure is assembled at a predetermined position of each main girder construction block. Must be done at.

  The present invention has been made in view of such circumstances, and provides a girder block capable of efficient work on a girder support structure and a steel bridge erection method using the girder block. .

The girder block according to the present invention includes a first main girder erection block and a second main girder erection block disposed opposite to each other, and a hinged lateral member that can be bent by a first hinge member provided at the center. One end of the hinged lateral member is connected to a predetermined part of the first main girder erection block by a second hinge member, and the other end of the hinged lateral member is joined by a third hinge member. The first hinge member, the second hinge member, and the third hinge member are respectively connected to predetermined portions of the second main girder erection block, and the first main girder erection block and the second main girder erection block, respectively. An axis extending in the height direction of the girder building block, and the hinged transverse member is bendable in the extending direction of the first main girder building block and the second main girder building block, and the hinged transverse member Part Configured to be maintained in parallel in the first main beam erection block and the second main beam erection block and its height direction by.

  With such a configuration, the first main girder erection block and the second main girder erection block can be brought close to each other and the girder block can be lifted and installed on the girder support structure with the hinged lateral member bent. Thereafter, the hinged lateral member in a bent state can be made straight by pulling the first main girder erection block and the second main girder erection block apart.

Further, in the girder block according to the present invention, one end is connected to another predetermined part of the first main girder erection block by a hinge member, and the other end is a main girder erection other than the first main girder erection block. A pivotable horizontal member of a predetermined length that can be coupled to the block ; the hinge member has an axis extending in a height direction of the first main girder erection block; It can be set as the structure which can be rotated centering on the axis | shaft of a hinge member .

With such a configuration, the first main girder erection block and the second main girder erection block are brought close to each other and the hinged lateral member is bent, and the rotatable lateral member is rotated and the first main girder erection block is rotated. The girder block can be lifted and placed on the girder support structure along the main girder erection block, and then the first main girder erection block and the second main girder erection block are pulled apart. The horizontal member with the hinge bent in a straight line is made straight, and the rotatable horizontal member with the hinge member as an axis is connected to the main girder erection block other than the first main girder erection block at the other end. it can be rotated to be a predetermined position.

The girder block according to the present invention has a main girder erection block , a predetermined length, one end of which is connected to a predetermined part of the main girder erection block by a hinge member, and the other end can be connected to another main girder erection block . A pivotable lateral member, and the hinge member has an axis extending in a height direction of the main girder erection block, and the pivotable lateral member is pivotable about the axis of the hinge member. It can be comprised so that it may become.

With such a configuration, the girder block can be lifted and placed on the girder support structure in a state in which the rotatable lateral member is along the main girder erection block, and then the above-mentioned movable member can be placed around the hinge member as an axis. For example, the rotating horizontal member can be rotated to a predetermined position so as to be orthogonal to the main girder erection block. In this state, the other end of the rotatable lateral member can be connected to another main girder erection block.

The steel bridge erection method according to the present invention includes a first main girder erection block and a second main girder erection block arranged opposite to each other, and a hinge that can be bent by a first hinge member provided at the center. One end of the hinged transverse member is connected to a predetermined portion of the first main girder erection block by a second hinge member, and the other end of the hinged transverse member is a third hinge. The first hinge member, the second hinge member, and the third hinge member are respectively connected to a predetermined portion of the second main girder erection block by a member, and each of the first main girder erection block and the second main girder erection block And the hinged lateral member is bendable in the extending direction of the first main girder erection block and the second main girder erection block, and the hinge Side A step of assembling the first digit block main girder erection block and the second main beam erection block is maintained parallel in the height direction by wood, the digit blocks, said first main beam erection Placing the block and the second main girder erection block close to each other and bending the hinged transverse member on the girder support structure; and A step of separating the first main girder erection block and the second main girder erection block so that the hinged transverse member is in a straight shape, and fixing the central part of the hinged transverse member by a fixing member, A step of fixing one end of the horizontal member with hinge and the first main girder erection block and fixing the other end of the horizontal member with hinge and the second main girder erection block. .

  With such a configuration, the girder block is not a main girder erection block alone, but is connected in a state where the first main girder erection block and the second main girder erection block are connected via a bent horizontal member. Since it will be placed on the girder support structure, it will be difficult to fall or buckle on the girder support structure. Then, after the first main girder erection block and the second main girder erection block are separated on the girder support structure so that the hinged lateral member is straight, the central part of the hinged lateral member is fixed. Fixed by a member, one end of the hinged transverse member and the first main girder erection block are fixed, and the other end of the hinged transverse member and the second main girder erection block are fixed. Therefore, the hinged lateral member is bent without particularly performing the alignment work for the first main girder erection block and the second main girder erection block, while maintaining the state where the girder block is not easily overturned or sideways buckled. It becomes possible to fix it to the first main girder erection block and the second main girder erection block in the form of a regular transverse member that does not do.

  A central portion of the horizontal member with hinge is fixed by a fixing member, one end portion of the horizontal member with hinge and the first main girder construction block are fixed, and the other end portion of the horizontal member with hinge and the second After the main girder erection block is fixed, the first hinge member, the second hinge member, and the third hinge member may be removed or left as they are. However, the first hinge member, the second hinge member, and the third hinge member are the first main girder erection block and the second main girder erection block as the hinged lateral member as a regular lateral member. Since it is not particularly necessary after being fixed, it is preferable to remove them.

The steel bridge erection method according to the present invention includes a first main girder erection block and a second main girder erection block arranged opposite to each other, and a hinge that can be bent by a first hinge member provided at the center. One end of the hinged transverse member is connected to a predetermined portion of the first main girder erection block by a second hinge member, and the other end of the hinged transverse member is a third hinge. The first hinge member, the second hinge member, and the third hinge member are respectively connected to a predetermined portion of the second main girder erection block by a member, and each of the first main girder erection block and the second main girder erection block And the hinged lateral member is bendable in the extending direction of the first main girder erection block and the second main girder erection block, and the hinge Side A step of assembling the first digit block main girder erection block and the second main beam erection block is maintained parallel in the height direction by wood, the digit blocks, said first main beam erection Placing the block and the second main girder erection block close to each other and bending the hinged transverse member on the girder support structure; and A step of separating the first main girder erection block and the second main girder erection block so as to have a predetermined interval; and a transverse member for the first main girder erection block and the second main girder erection block; and fixing the said lateral members with the hinge by removing the third hinge member with removing said second hinge member from said first main beam erection blocks from the second main beam erection block the Configuration and composed of a step of removing from the main girder erection block and the second main beam erection blocks.

  With such a configuration, the girder block is placed on the girder support structure in a state in which the first main girder erection block and the second main girder erection block are connected via the bent horizontal member. Therefore, compared to a single main girder erection block on the girder support structure, it is difficult to fall or buckle. Then, after separating the first main girder erection block and the second main girder erection block at a predetermined interval on the girder support structure, a transverse member is connected to the first main girder erection block and the first main girder erection block. Since the hinged lateral member is removed from the first main girder erection block and the second main girder erection block, it is difficult for the girder block to fall or buckle over. It is possible to fix the regular transverse member to the first main girder erection block and the second main girder erection block while maintaining the above.

The steel bridge erection method according to the present invention includes a first main girder erection block and a second main girder erection block arranged opposite to each other, and a hinge that can be bent by a first hinge member provided at the center. One end of the hinged transverse member is connected to a predetermined portion of the first main girder erection block by a second hinge member, and the other end of the hinged transverse member is a third hinge. The first hinge member, the second hinge member, and the third hinge member are respectively connected to a predetermined portion of the second main girder erection block by a member, and each of the first main girder erection block and the second main girder erection block An axis extending in the height direction of the main girder building block, and the hinged lateral member is bendable in the extending direction of the first main girder building block and the second main girder building block, With hinge Wherein said first main beam erection blocked by member second and the main girder erection blocks are maintained parallel in the height direction and one end portion other of the first main beam erection block by a hinge member A pivotable lateral member having a predetermined length, the other end portion being connected to a main girder erection block other than the first main girder erection block , wherein the hinge member includes the first member A step of assembling a girder block having a shaft extending in a height direction of the main girder erection block, wherein the rotatable lateral member is rotatable about the axis of the hinge member; and In a state where the movable lateral member is aligned with the first main girder erection block, the first main girder erection block and the second main girder erection block are brought close to each other, and the hinged lateral member is bent. A step of placing the support structure on the support structure; A step of separating the first main girder erection block and the second main girder erection block in the girder block on a structure so that the hinged lateral member is in a straight shape; and the rotatable lateral member Pivoting the hinge member as a shaft to a predetermined position, fixing a central portion of the hinged transverse member with a fixing member, and one end of the hinged transverse member and the first main girder erection block; It was fixed, fixed to the other end portion of the horizontal member with the hinge and fixing a second main beam erection block, the one end portion and the first main beam erection block of the adjustable-rotating transverse member It is the structure which has a process to do.

  With such a configuration, the girder block has a hinged horizontal member in which the rotatable lateral member is placed along the first main girder erection block and the first main girder erection block and the second main girder erection block are bent. Since it is placed on the girder support structure in a state of being connected via the members, it is difficult to fall or buckle on the girder support structure. Then, after the first main girder erection block and the second main girder erection block are separated on the girder support structure so that the hinged lateral member is straight, the central part of the hinged lateral member is fixed. Fixed by a member, one end of the hinged transverse member and the first main girder erection block are fixed, and the other end of the hinged transverse member and the second main girder erection block are fixed. Therefore, the hinged lateral member is bent without particularly performing the alignment work for the first main girder erection block and the second main girder erection block, while maintaining the state where the girder block is not easily overturned or sideways buckled. It becomes possible to fix it to the first main girder erection block and the second main girder erection block in the form of a regular transverse member that does not do. Further, after the rotatable horizontal member is rotated to a predetermined position, the rotatable horizontal member is fixed to the first main girder erection block, so that the state in which the girder block is not easily overturned or laterally buckled is maintained. However, the rotatable lateral member can be fixed to the first main girder erection block by a simple positioning operation with respect to the first main girder erection block.

  When the pivotable lateral member is hinged to the first main girder erection block so as to be pivotable toward the second main girder erection block, The end can be fixed to the second main girder erection block. In this case, the rotatable transverse member is a regular transverse member provided between the first main girder erection block and the second main girder erection block. Further, when the pivotable lateral member is hinged to the first main girder erection block so that it can pivot toward the opposite side of the second main girder erection block, the pivotable lateral member The other end can be fixed to another main girder erection block. In this case, the pivotable horizontal member includes a first main girder erection block and another main girder erection block on the opposite side of the second main girder erection block across the first main girder erection block. It becomes a regular transverse member provided between them.

  Further, after the rotatable lateral member is fixed to the first main girder erection block, the hinge member that connects the rotatable lateral member to the first main girder erection block may be removed or left as it is. Good. However, since the hinge member is not particularly necessary after the rotatable lateral member is fixed to the first main girder erection block as a regular lateral member, it is preferable to remove them.

In addition, the steel bridge erection method according to the present invention can be bent by the first main girder erection block and the second main girder erection block disposed opposite to each other, and the first hinge member provided in the center portion. A hinged transverse member, one end of the hinged transverse member is connected to a predetermined portion of the first main girder erection block by a second hinge member, and the other end of the hinged transverse member is 3 hinge members are connected to a predetermined part of the second main girder erection block, and each of the first hinge member, the second hinge member and the third hinge member includes the first main girder erection block and the An axis extending in the height direction of the second main girder erection block is provided, and the hinged lateral member can be bent in the extending direction of the first main girder erection block and the second main girder erection block. Said Hin Attached by a transverse member and the first main beam erection block and the second main beam erection block is maintained parallel to the height direction thereof, further, one end of the first main beam erection block by a hinge member The hinge member is connected to another predetermined part, and has a movable member having a predetermined length, the other end of which can be connected to a main girder erection block other than the first main girder erection block . A step of assembling a spar block having a shaft extending in a height direction of the main girder erection block, and the rotatable lateral member being rotatable about the axis of the hinge member ; In a state where the pivotable lateral member is placed along the first main girder erection block, the hinged lateral member is bent by bringing the first main girder erection block and the second main girder erection block closer to each other , Before placing on the girder support structure, A step of separating the first main girder erection block and the second main girder erection block in the girder block on the girder support structure at a predetermined interval; and Rotating the hinge member as an axis, fixing one end portion of the rotatable horizontal member and the first main girder construction block, and fixing the other end portion of the rotatable horizontal member and the first a step of fixing the second main girder erection block, wherein by removing the third hinge member with removing said second hinge member from said first main beam erection blocks from the second main beam erection block And removing the hinged transverse member from the first main girder erection block and the second main girder erection block.

  With such a configuration, the girder block has a hinged horizontal member in which the rotatable lateral member is placed along the first main girder erection block and the first main girder erection block and the second main girder erection block are bent. Since it is placed on the girder support structure in a state of being connected via the members, it is difficult to fall or buckle on the girder support structure. And after separating the first main girder erection block and the second main girder erection block at a predetermined interval on the girder support structure and rotating the rotatable lateral member to a predetermined position, The pivotable lateral member is fixed to the first main girder erection block and the second main girder erection block, and the hinged lateral member is separated from the first main girder erection block and the second main girder erection block. Since the spar is not removed, it is difficult for the girder block to fall or buckle and buckle, but the pivotable lateral member is properly positioned by aligning it with the first main girder erection block and the second main girder erection block. It becomes possible to fix to the first main girder erection block and the second main girder erection block as a transverse member.

  Moreover, in the steel bridge erection method according to the present invention, it is possible to adopt a configuration including a step of fixing a transverse member to the first main girder erection block and the second main girder erection block.

  With such a configuration, after the rotatable lateral member is fixed as the regular lateral member to the first main girder erection block and the second main girder erection block, the lateral member is changed to the first main girder erection block. Since it is fixed to the second main girder erection block, the first main girder erection block and the second main girder block with the transverse member as a regular transverse member while maintaining a state in which the girder block is not easily overturned or sideways buckled. It can be fixed to the girder building block.

  In addition, it replaces with the removed horizontal member with a hinge so that the said horizontal member may be fixed to the site | part to which the said horizontal member with a hinge of the 1st main girder construction block and the 2nd main girder construction block was attached. Alternatively, it may be fixed to another part.

The steel bridge erection method according to the present invention includes a main girder erection block, one end connected to a predetermined part of the main girder erection block by a hinge member, and the other end connected to another main girder erection block. The hinge member has an axis extending in the height direction of the main girder erection block, and the rotatable lateral member rotates about the axis of the hinge member. A step of assembling a possible girder block, a step of placing the girder block on a girder support structure in a state where the rotatable lateral member is along the main girder erection block, and the girder support structure A step of rotating the rotatable horizontal member in the girder block up to a predetermined position around the hinge member, and a step of fixing one end of the rotatable horizontal member and the main girder erection block; The other end of the rotatable lateral member and another main girder installation block A configuration and a step of fixing the click.

  With such a configuration, the girder block is placed on the girder support structure in a state where the rotatable horizontal member is aligned with the main girder erection block, and the rotatable horizontal member is rotated to a predetermined position. Later, since one end of the rotatable horizontal member is fixed to the main girder erection block and the other end of the rotatable horizontal member is fixed to another main girder erection block, positioning with respect to the main girder erection block Without particular work, the rotatable lateral member can be fixed as a regular lateral member to the main girder erection block and another main girder erection block.

  A first main girder erection block and a second main girder erection block disposed opposite to each other, and a hinged lateral member that can be bent by a first hinge member provided in the center portion, and with the hinge One end of the horizontal member is connected to a predetermined portion of the first main girder building block by a second hinge member, and the other end of the hinged horizontal member is connected to the second main girder building block by a third hinge member. According to the steel bridge erection method using the girder block connected to the predetermined part of the main girder erection block (the first girder block mounted on the girder support structure in a state where it is difficult to fall or buckle and buckle. Work on the main girder erection block and the second main girder erection block), so that the work burden of measures to prevent the main girder erection block from falling or buckling can be reduced. , It is possible to improve the efficiency of work on the girder support structure as result. In addition, since the main girder erection block placed on the girder support structure is in a state where it does not easily fall over or laterally buckle, the length of the main girder erection block should be relatively long, and therefore (including vents). The interval between the girder support structures can be lengthened, and the number of main girder erection blocks and the number of vent installation bases necessary for erection of steel bridges of a predetermined length can be reduced. It is possible to reduce the amount of work such as lifting the block, connecting the main girder erection block on the girder support structure, and installing / removing the vents. it can.

  In particular, the central part of the horizontal member with hinges is fixed by a fixing member, and both ends thereof are fixed to the first main girder erection block and the second main girder erection block. When a regular transverse member that is not bent is fixed to the first main girder erection block and the second main girder erection block, the regular transverse member is fixed to the first main girder without any special positioning work. Since it becomes possible to fix to the girder erection block and the second main girder erection block, it becomes possible to further improve the efficiency of the work on the girder support structure.

  Further, the steel bridge erection according to the present invention using a girder block having a main girder erection block and a rotatable transverse member having one end connected to a predetermined part of the main girder erection block by a hinge member and having a predetermined length. According to the method, the girder block is placed on the girder support structure in a state where the rotatable horizontal member is along the main girder erection block, and the rotatable horizontal member is rotated to a predetermined position. After that, by fixing one end portion of the rotatable lateral member to the main girder erection block, the rotatable lateral member is used as a regular lateral member without performing any special positioning work with respect to the main girder erection block. Since it becomes possible to fix to the girder construction block, it becomes possible to improve the efficiency of the work on the girder support structure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The basic configuration of the digit block according to the first embodiment of the present invention is as shown in FIG. In FIG. 3A, this girder block is composed of a first main girder erection block 100a and a second main girder erection block 100b that are arranged to face each other, and a first hinge member 300 provided at the center. A hinged transverse member 200, and one end of the hinged transverse member 200 is connected to a predetermined portion of the first main girder erection block 100a by a second hinge member 400, and the hinged transverse member The other end of 200 is connected to a predetermined portion of the second main girder erection block 100b by a third hinge member 500. The girder block having such a structure is constructed in such a manner that the first main girder erection block 100a and the second main girder erection block 100b are brought close to each other and the hinged lateral member 200 is bent, and the abutment 10, the piers 11, 12, The first main girder erection block can be lifted and placed on the girder support structure such as the vents 13 and 14 (see FIG. 2), and then the second main girder erection block 100b is laterally pulled. The hinged lateral member 200 in a state in which the second main girder erection block 100b is pulled away from 100a and bent can be made straight.

  The basic configuration of the digit block according to the second embodiment of the present invention is as shown in FIG. In FIG. 3 (b), this girder block includes a main girder erection block 100a, and one end of which is connected to a predetermined part of the main girder erection block 100a by a hinge member 700, and a rotatable lateral member 600 having a predetermined length. It has a structure. The girder block having such a structure is placed on the girder support structure in a state where the rotatable lateral member 600 is placed along the main girder erection block 100a so as to be substantially parallel to the main girder erection block 100a. After that, the rotatable lateral member 600 can be rotated to a predetermined position (for example, until it is orthogonal to the main girder erection block 100a) with the hinge member 700 as an axis. In this state, it is possible to connect the end of the rotatable lateral member 600 opposite to the end connected to the main girder erection block 100a to another main girder erection block 100b.

  A more specific example of a girder block (first embodiment of the present invention) having a hinged lateral member 200 as shown in FIG.

  First, FIG. 4 thru | or FIG. 6 shows the girder block provided with the horizontal member with a hinge which has a structure as an anti-tilt structure. FIG. 4 is a plan view of the state of the first main girder erection block and the second main girder erection block before the separation (a) and the separation of the first main girder erection block (b) from above. FIG. 5 is a front view of the hinged transverse member of the spar block in which the first main girder erection block and the second main girder erection block are separated so that the hinged transverse member is straight. 6 (a) is a partially cutaway view taken along arrow A1-A2 in FIG. 5, and FIG. 6 (b) is a view taken along arrow A3-A4 in FIG. ) Is a view taken in the direction of arrows B1-B2 in FIG.

  As shown in FIGS. 4 (a) and 4 (b), this girder block is provided in the center with the first main girder erection block 100a and the second main girder erection block 100b arranged opposite to each other. The first hinge member 310 has a hinged lateral member 210 (hereinafter referred to as a hinged countertilt) that can be bent by the first hinge member 310, and one end of the hinged countertilt 210 is formed by the second hinge member 410. The second main girder erection block 100b is connected to a predetermined part of the second main girder erection block 100b by a third hinge member 510 and connected to a predetermined part of the first main girder erection block 100a.

  More specifically, as shown in FIGS. 5 and 6, each of the first main girder erection block 100 a and the second main girder erection block 100 b has an upper flange at the upper end edge of the abdominal plate (web) 103. 101 is formed, and a lower flange 102 is formed at the lower end edge of the abdominal plate 103, and the cross section is made of a steel material having an I shape. In addition, the main girder members having such a shape are singly or in many cases connected together to form a first main girder erection block 100a and a second main girder erection block 100b having a predetermined length. In this example, the hinged anti-tilt structure 210 includes an upper chord material 211 made of channel steel, a lower chord material 212 made of CT steel, and diagonal members 213a and 213b made of angle steel. It has an assembled structure.

  The upper chord material 211 is equally divided into two partial materials 211a and 211b, and the lower chord material 212 is also equally divided into two partial materials 212a and 212b. The first hinge member 310 shown in FIG. 4 is composed of two hinge units 311 and 312. The upper chord member 211 can be bent at the center portion thereof by bolting and fixing the end portions of the bracket 311b on both sides of the hinge pin 311a of the hinge unit 311 to the partial members 211a and 211b (FIG. 5, FIG. 5). 6 (a)), the ends of the bracket 312b extending on both sides of the hinge pin 312a of the hinge unit 312 are bolted and fixed to the dividing members 212a and 212b, so that the lower chord material 212 is bent at the center thereof. This is possible (see FIGS. 5 and 6C). As a result, the hinged anti-tilt structure 210 has a structure that can be bent by the first hinge member 310 (hinge units 311 and 312) provided at the center thereof.

  A gusset plate 121a is fixed by welding or the like to the end portion of the one main member 211a of the upper chord member 211 on the first main girder erection block 100a side, and this gusset plate 121a is fixed to the first main girder erection block 100a. It contacts the stiffener 104. A gusset plate 121b is fixed to the end of the other partial member 211b of the upper chord member 211 on the second main girder erection block 100b side by welding or the like, and this gusset plate 121b is fixed to the second main girder erection block 100b. It contacts the stiffener 104. Further, a gusset plate 122a is fixed by welding or the like to the end portion of the first chord construction block 100a side of one partial member 212a of the lower chord member 212, and this gusset plate 122a is the first main girder construction block. It contacts the stiffener 104 of 100a. Further, a gusset plate 122b is fixed by welding or the like to the end portion of the other partial member 212b of the lower chord member 212 on the second main girder erection block 100b side, and this gusset plate 122b is fixed to the second main girder erection block. It contacts the stiffener 104 of 100b.

  Gusset plates 123a and 123b are fixed by welding or the like to the opposing end portions of the partial members 211a and 211b of the upper chord material 211, respectively. Then, one end portion of the diagonal member 213a is fixed to the gusset plate 123a fixed to the partial member 211a of the upper chord member 211 by welding or the like, and the other end portion of the diagonal member 213a is fixed to the partial member 212a of the lower chord member 212. It is fixed to the plate 122a by welding or the like. Further, one end portion of the diagonal member 213b is fixed to the gusset plate 123b fixed to the partial member 211b of the upper chord member 211 by welding or the like, and the other end portion of the diagonal member 213b is fixed to the partial member 212b of the lower chord member 212. It is fixed to the plate 122b by welding or the like.

  As shown in FIG. 4, the second hinge member 410 that couples the hinged anti-tilt structure 210 and the first main girder construction block 100 a is composed of two hinge units 411 and 412. One end of a bracket 411b extending on both sides of the hinge pin 411a of the hinge unit 411 is bolted and fixed integrally with the gusset plate 121a to the end of the partial member 211a of the upper chord material 211, and the other end is the first main girder. The steel plate 104 of the erection block 100a is bolted and fixed integrally with a liner plate (not shown) having the same thickness as the gusset plate 121a (see FIGS. 5 and 6A). Also, one end of a bracket 412b extending on both sides across the hinge pin 412a of the hinge unit 412 is bolted and fixed to a gusset plate 122a fixed to the end of the partial material 212a of the lower chord material 212, and the other end is the first. And the liner plate 125a having the same thickness as the gusset plate 122a are bolted and fixed integrally to the reinforcing steel material 104 of the main girder erection block 100a (see FIGS. 5 and 6C). Accordingly, the girder block has a structure in which one end portion of the hinged tilting structure 210 is connected to a predetermined portion of the first main girder erection block 100a by the second hinge member 410 (hinge units 411 and 412).

  As shown in FIG. 4, the third hinge member 510 that connects the hinged anti-tilt structure 210 and the second main girder erection block 100 b includes two hinge units 511 and 512. One end of a bracket 511b extending on both sides of the hinge pin 511a of the hinge unit 511 is bolted and fixed integrally with the gusset plate 121b to the end of the partial member 211b of the upper chord material 211, and the other end is the second main girder. The steel plate 104 of the installation block 100b is bolted and fixed integrally with the liner plate 124b having the same thickness as the gusset plate 121b (see FIGS. 5 and 6B). Also, one end of a bracket 512b extending on both sides of the hinge pin 512a of the hinge unit 512 is bolted and fixed to a gusset plate 122b fixed to the end of the partial material 212b of the lower chord material 212, and the other end is second. And the liner plate 125b having the same thickness as the gusset plate 122b are bolted and fixed integrally to the reinforcing steel material 104 of the main girder erection block 100b (see FIGS. 5 and 6C). Accordingly, the girder block has a structure in which the other end portion of the hinged tilting structure 210 is connected to a predetermined portion of the second main girder erection block 100b by the third hinge member 510 (hinge units 511 and 512).

  Next, a girder block having a hinged cross member having a structure as a distribution cross beam is shown in FIGS. FIG. 7 is a plan view of the state before the first main girder erection block and the second main girder erection block are separated (a) and the girder block in a state (b) where they are separated from the top. FIG. 8 is a front view of the hinged transverse member of the spar block in which the first main girder erection block and the second main girder erection block are separated so that the hinged transverse member is straight. It is a partially cutaway view of (a) and its A1-A2 arrow.

  As shown in FIGS. 7 (a) and 7 (b), this girder block is provided in the central portion with the first main girder erection block 100a and the second main girder erection block 100b arranged opposite to each other. A hinged lateral member (hereinafter referred to as a hinged lateral beam) 220 that can be bent by the first hinge member 320 and has a structure as a distributed lateral beam. One end of the hinged lateral beam 220 is a second hinge. The member 420 is connected to a predetermined part of the first main girder erection block 100b and the other end of the hinged distribution cross girder 220 is connected to a predetermined part of the second main girder erection block 100b by a third hinge member 520. ing.

  More specifically, as shown in FIG. 8, the hinged cross beam 220 is composed of two cross beam parts 221 and 222. Each cross beam member 221 and 222 is made of a steel material having an I-shaped cross section in which an upper flange and a lower flange are formed on the upper edge and the lower edge of the abdomen plates 221a and 222a, similarly to the main girder construction blocks 100a and 100b. It is configured. The first hinge member 320 (see FIG. 7) includes two hinge units 321 and 322. One end of a bracket 321b extending with a step across the hinge pin 321a of the hinge unit 321 is bolted and fixed to the upper flange of the cross beam member 221 integrally with a liner plate 141 having a thickness corresponding to the step. The other end of 321b is directly bottled and fixed to the upper flange of the cross beam part member 222. Similarly, the hinge unit 322 is fixed to the lower flange of the cross beam member 221 and the lower flange of the cross beam member 222 using the liner plate 142. As a result, the hinged distribution cross beam 220 has a structure that can be bent by the first hinge member 320 (hinge units 321 and 322) provided at the center thereof.

  A second hinge member 420 (see FIG. 7) for connecting the hinged distribution cross beam 220 and the first main girder installation block 100a includes two hinge units 421 and 422. One end of a bracket 421b extending on both sides across the hinge pin 421a of the hinge unit 421 is bolted and fixed to the stiffener 104 of the first main girder erection block 100a, and the other end is a belly plate 221a of the cross beam member 221. And a liner plate 143 having the same thickness as the stiffener 104 and bolted and fixed integrally (see FIG. 8B). Similarly, the hinge unit 422 is also bolted and fixed to the abdomen plate 221a of the cross beam part member 221 and the stiffener 104 of the first main girder installation block 100a. As a result, one end of the hinged distribution cross beam 220 is connected to the first main girder erection block 100a by the second hinge member 420 (hinge units 421 and 422).

  A third hinge member 520 (see FIG. 7) for connecting the hinged distribution cross beam 220 and the second main girder erection block 100b includes two hinge units 521 and 522. One end of a bracket 521b extending on both sides across the hinge pin 521a of the hinge unit 521 is bolted to the end of the abdomen plate 222a of the cross beam member 222, and the other end extends from the second main girder erection block 100b. The steel member 105 having the I-shaped cross section is fixed to the belly plate 105a of the steel member 105 with bolts. Similarly, the hinge unit 522 is bolted and fixed to the end portion of the abdomen plate 222 a of the cross beam part member 222 and the abdomen plate 105 a of the steel member 105. Accordingly, the other end of the hinged distribution cross beam 220 is connected to the second main girder erection block 100b by the third hinge member 520 (hinge units 521 and 522).

  FIG. 8 and FIG. 11 described later show a case where the first main girder erection block 100a is an outer girder and the second main girder erection block 100b is an inner girder. The hinged distribution cross beam can be used even if the first main girder erection block 100a and the second main girder erection block 100b are both inner girders or the inner girder and outer girder are reversed. , Works in exactly the same way. In FIG. 8, when the first main girder erection block 100a is an inner girder, the connecting structure of the partial member 221 of the hinged distribution girder 220 and the first main girder erection block 100a is the same as that of the hinged distribution girder 220. This is the same as the connection structure between the partial member 222 and the second main girder construction block 100b.

  As described above, the girder bridge is constructed according to the following procedure using the girder block having the hinged transverse member 200 (the hinged anti-tilt 210 and the hinged transverse beam 220).

(1) Examination and determination of frame design plan Girder block configuration (length and number of main girder erection block, type, number and position of hinged horizontal members), base number and position of vent, crane type and capacity used, The installation position is examined and determined.
(2) Installation of vent facilities The determined number of vents is installed at the determined position.
(3) Ground assembly of girder block The girder block of the determined configuration is assembled on the ground. As shown in FIG. 3A, a girder block having a structure in which at least a hinged transverse member 200 is connected to a first main girder erection block 100a and a second main girder erection block 100b, As shown in FIGS. 4 to 6, at least a hinged tilting structure 210 is connected to the first main girder erection block 100a and the second main girder erection block 100b. As shown, a girder block having a structure in which at least a hinged distribution cross beam 220 is connected to the first main girder erection block 100a and the second main girder erection block 100b is assembled on the ground.

(4) Girder block erection The first main girder erection block 100a and the second main girder erection block 100b are brought close to each other to maximize the hinged transverse member 200 (the hinged tilting structure 210 and the hinged transverse girder 220). In a bent state (see FIGS. 4A and 7A), the hinged lateral member 200, the first main girder erection block 100a, and the second main girder erection block 100b are temporarily fixed. In this state, as shown in FIG. 2, the girder construction crane 20 is used as a girder component member C on the girder support structure such as a substructure (abutment 10, pier 11, 12) or vents 13, 14. It is lifted and placed.

  On the girder support structure, for example, the first main girder erection block 100a is temporarily fixed to the girder support structure, and the second main girder erection block 100b is laterally pulled in a direction perpendicular to the bridge axis ( 4 (b) and 7 (b)), the second main girder erection block 100b is changed from the first main girder erection block 100a to a hinged cross member 200 (a hinged tilting structure 210, a hinged cross girder 220). ) Is pulled apart so as to be straight. For example, when the first main girder erection block 100a and the second main girder erection block 100b are pulled apart so that the hinged anti-tilt structure 210 is straight, the hinged lateral member of the girder block is shown in FIGS. For example, when the first main girder erection block 100a and the second main girder erection block 100b are pulled apart so that the hinged distribution girder 220 becomes a straight shape, the girder block The distribution beam with hinges is in a state as shown in FIG. Note that the horizontal pulling of the second main girder erection block 100b can be performed by a horizontal installation facility or the like.

(5) Fixing of the transverse member Next, the central part of the hinged transverse member 200 that is straight between the first main girder erection block 100a and the second main girder erection block 100b is fixed by the fixing member, One end of the hinged lateral member 200 and the first main girder erection block 100a are fixed, and the other end of the hinged lateral member 200 and the second main girder erection block 100b are fixed. Thereby, the horizontal member 200 with a hinge becomes a regular horizontal member which does not bend, and is fixed to the 1st main girder construction block 100a and the 2nd main girder construction block 100b.

  For example, as shown in FIGS. 9 and 10, the hinged tilting structure 210 that was in the state shown in FIGS. 5 and 6 is regular to the first main girder construction block 100 a and the second main girder construction block 100 b. It is fixed as an anti-tilt structure (lateral member).

  That is, the attachment plate 131 is transferred to the upper surface of each of the partial members 211a and 211b of the upper chord material 211, and the attachment plate 131 is fixed to the partial members 211a and 211b by high strength bolts or the like. The hinge unit 311 (see FIGS. 5 and 6) that has been fixed by bolting is removed, and the attachment plate 132 is fixed to the separating members 211a and 211b and the gusset plates 123a and 123b by high-strength bolts or the like. In addition, the hinge plates 312 (the bolts fixedly fastened with bolts 133a, 133b, 134a, 134b (not shown), 135a, 135b) are fixed to the partial members 212a, 212b of the lower chord material 212 by high strength bolts or the like. (See FIGS. 5 and 6). In this way, the central part of the hinged counter tilting structure 210 is fixed by the fixing members (attaching plates 131, 132, 133a, 133b, 134a, 134b, 135a, 135b).

  Furthermore, it is fixed to the end of the partial material 211a of the upper chord material 211, fixed to the end of the partial material 212a of the gusset plate 121a and the lower chord material 212 that contacts the stiffener 104 of the first main girder construction block 100a, Each of the gusset plates 122a contacting the stiffener 104 of the first main girder erection block 100a is fixed to the stiffener 104 with a high-strength bolt or the like. The hinge units 411 and 412 (see FIGS. 5 and 6) that have been fixed with bolts are removed. In this way, one end of the hinged counter tilting structure 210 is fixed to the first main girder erection block 100a.

  Further, it is fixed to the end portion of the partial material 211b of the upper chord material 211, fixed to the end portion of the partial material 212b of the lower chord material 212, and the gusset plate 121b contacting the stiffener 104 of the second main girder construction block 100b, Each of the gusset plates 122b contacting the stiffener 104 of the second main girder erection block 100b is fixed to the stiffener 104 with a high-strength bolt or the like. The hinge units 511 and 512 (see FIGS. 5 and 6) that have been fixed with bolts are removed. In this way, the other end of the hinged counter tilting structure 210 is fixed to the second main girder construction block 100b.

  Further, for example, the hinged distribution cross beam 220 which is in the state shown in FIG. 8 has a normal distribution cross beam in the first main girder construction block 100a and the second main girder construction block 100b as shown in FIG. It is fixed as a (horizontal member).

  That is, the attachment plates 152a and 152b arranged so as to sandwich the abdominal plates 221a and 222a of the cross beam members 221 and 222 are fixed to the abdominal plates 221a and 222b by high strength bolts or the like. The hinge units 321 and 322 (see FIG. 8) are removed, and the attachment plates 151a, 151b, 155a, and 155b are fixed to the upper flange and the lower flange of the lateral member 221 and 222 by high-strength bolts or the like. In this way, the central portion of the hinged distribution cross beam 220 is fixed by the fixing members (attachment plates 151a, 151b, 152a, 152b, 155a, 155b).

  Further, the end portion of the abdomen plate 221a of the cross beam member 221 is fixed to the stiffener 104 of the first main girder erection block 100a with a high-strength bolt or the like, and the hinge units 421 and 422 (see FIG. 8) are removed. . In this manner, one end portion of the hinged distribution cross beam 220 is fixed to the first main girder construction block 100a.

  Further, the attachment plates 153a and 153b arranged so as to sandwich the upper flange of the cross beam part member 222 and the upper flange of the steel member 105 extending from the second main girder construction block 100b are connected to the upper flange by high strength bolts or the like. Fixed to. Further, the attachment plates 156a and 156b arranged so as to sandwich the lower flange of the cross beam member 222 and the lower flange of the steel member 105 extending from the second main girder erection block 100b are connected to the lower flange by high strength bolts or the like. Fixed to. Thereafter, the hinge units 521 and 522 (see FIG. 8) that have been fixed by bolting are removed, and the attachment plate is arranged so as to sandwich the belly plate 222a of the cross beam part member 222 and the belly plate 105a of the steel member 105. 154a and 154b are fixed to the abdominal plates 222a and 105a by high strength bolts or the like. In this manner, the other end portion of the hinged distribution cross beam 220 is fixed to the second main girder construction block 100b.

  As described above, the hinged transverse member 200 (the hinged tilting structure 210 and the hinged transverse beam 220) becomes a regular transverse member that does not bend, and the first main girder erection block 100a and the second main beam building block 100a. After being fixed to the girder construction block 100b, the procedures (3) to (5) are repeated, and the girder bridge is sequentially assembled on the girder support structure. It should be noted that other operations such as camber adjustment, final tightening of high-strength bolts, and vent disassembly are performed according to known methods.

  In the construction method of the girder bridge, the girder block brings the first main girder erection block 100a and the second main girder erection block 100b close to each other, and the transverse member 200 with a hinge (a hinged tilting structure 210, a hinged transverse girder). 220) is bent and placed on the girder support structure, it is difficult to fall or buckle on the girder support structure. Then, on the girder support structure, the first main girder erection block 100a and the second main girder erection block 100b are arranged in a straight shape with a hinged transverse member 200 (a hinged inclined structure 210, a hinged transverse girder 220). After being pulled apart, the central part of the hinged transverse member 200 (the hinged anti-tilt structure 210, the hinged transverse beam 220) is fixed by a fixing member, and the hinged transverse member 200 (the hinged anti-tilt structure 210, the hinge) One end of the distributed girder 220) and the first main girder construction block 100a are fixed, and the other end of the hinged transverse member 200 (the hinged tilting structure 210, the hinged transverse girder 220) and the second Since the main girder construction block 100b is fixed, the first main girder construction block 100a and the main girder construction block 100a Without performing any specific alignment operation with respect to the second main girder erection block, a normal transverse member (anti-tilt structure) that does not bend the hinged transverse member 200 (the hinged anti-tilt structure 210, the hinged transverse beam 220). It is possible to fix to the first main girder erection block 100a and the second main girder erection block 100b.

  As described above, since the work can be performed on the girder block placed on the girder support structure in a state where it is difficult to fall or buckle, the main girder erection block (first main girder erection block) 100a and the second main girder erection block 100b) can be reduced in the work load of the preventive measures against overturning or sideways buckling, and as a result, the work efficiency on the girder support structure can be improved. become. In addition, it is possible to fix a regular transverse member (an inclined structure, a distribution transverse beam) to the first main girder erection block 100a and the second main girder erection block 100b without performing special positioning work. Therefore, it is possible to further improve the efficiency of the work on the girder support structure.

  Furthermore, since the main girder erection block can be placed on the girder support structure in a state where it is difficult to fall or buckle and buckle, the main girder erection block can be made relatively long. For this reason, the number of vents to be installed can be reduced, and the number of main girder erection blocks to be connected on the girder support structure can be reduced. be able to.

  In the example described above, the first main girder erection block 100a is formed by using the transverse member 200 with hinges (a pair of tilted structures 210 with hinges and a distribution cross beam 220 with hinges) as a regular transverse member (a pair of tilted structures and distribution cross beams). When the second main girder construction block 100b is fixed, the first hinge member 300 (310 (hinge units 311 and 312), 320 (hinge units 321 and 322)) and the second hinge member 400 (410 (hinge) Units 411, 412), 420 (hinge units 421, 422)) and third hinge member 500 (510 (hinge units 511, 512), 520 (hinge units 521, 522)) were removed. You may leave all or a part attached to the girder unit. When each hinge member is removed, the hinge member can be used to assemble another spar block.

  In the example described above, the first main girder erection block 100a and the second main girder erection block 100b are arranged in parallel. However, if they are arranged to face each other, they are particularly parallel. This is not always the case. The arrangement relationship between the first main girder erection block 100a and the second main girder erection block 100b in each girder block is determined according to the structure of the girder bridge to be erected. When the first main girder erection block 100a and the second main girder erection block are not parallel, the length of the hinged lateral member connected to the first main girder erection block 100b and the second main girder erection block 100b The length varies depending on the position to be connected.

  In the example described above, the hinged transverse member 200 (the hinged anti-tilt structure 210 and the hinged transverse beam 220) has the first main girder erection block 100a and the second main girder erection block 100b arranged in parallel. However, the first main girder erection block 100a and the second main girder erection block 100b are orthogonal to each other. However, the present invention is not limited to this. The hinged lateral member 200 that is straight between the first main girder erection block 100a and the second main girder erection block 100b that are arranged to face each other is provided with the first main girder erection block 100a and the second main girder erection block 100a. A predetermined angle can be given to the main girder erection block 100b.

  Next, a more specific example of a girder block (second embodiment of the present invention) having a rotatable transverse member 600 as shown in FIG. 3B will be described.

  First, a girder block provided with a rotatable horizontal member having a structure as a tilting structure is shown in FIGS. FIG. 12 is a front view of the rotatable horizontal member of the girder block in which the rotatable horizontal member is orthogonal to the main girder erection block, and FIG. 13 (a) is an arrow A1-A2 in FIG. 13 is a partially cutaway view, and FIG. 13B is a plan view taken along arrow B1-B2 in FIG.

  12 and 13, this girder block is composed of a main girder erection block 100a and an inclined structure in which one end is connected to a predetermined part of the main girder erection block 100a by hinge units 711 and 712 (corresponding to the hinge member 700). And a rotatable horizontal member (hereinafter referred to as a rotatable pair tilting structure) 610 having the following structure. In this example, the pivotable tilting structure 610 includes an upper chord material 611 made of channel steel, a lower chord material 612 made of CT steel, and diagonal members 613a and 613b made of angle steel as an assembling structure. It has a structured.

  A gusset plate 121a is fixed to the end portion of the upper chord member 611 by welding or the like, and the gusset plate 121a contacts the stiffener 104 of the main girder erection block 100a. A gusset plate 121b is fixed to the other end portion of the upper chord member 611 by welding or the like. A gusset plate 122a is fixed to the end portion of the lower chord member 612 by welding or the like, and this gusset plate 122a abuts against the stiffener 104 of the main girder erection block 100a. A gusset plate 122b is fixed to the other end of the lower chord member 612 by welding or the like. Further, a gusset plate 123 is fixed to the center portion of the upper chord material 611 by welding or the like. One end of the diagonal member 613a is fixed to the gusset plate 123 fixed to the center portion of the upper chord member 611 by welding or the like, and the other end portion of the diagonal member 613b is fixed to the end portion of the lower chord member 612 on the main girder construction block 100a side. The gusset plate 122a is fixed by welding or the like. Further, one end of the diagonal member 613b is fixed to the gusset plate 123 fixed to the center portion of the upper chord member 611 by welding or the like, and the other end portion of the diagonal member 613b is opposite to the main girder erection block 100a of the lower chord member 612. It is fixed to the gusset plate 122b fixed to the end by welding or the like.

  This girder block has two hinge units 711 and 712 as a hinge member 700 (see FIG. 3B). One end of a bracket 711b extending on both sides of the hinge pin 711a of the hinge unit 711 is bolted and fixed integrally with the gusset plate 121a to the end of the upper chord member 611, and the other end is the steel member 104 of the main girder erection block 100a. And a liner plate (not shown) of the same thickness as the gusset plate 121a and bolted and fixed integrally (see FIGS. 12 and 13A). Further, one end of a bracket 712b extending on both sides of the hinge pin 712a of the hinge unit 712 is bolted to a gusset plate 122a fixed to the end of the lower chord member 612, and the other end is supplemented to the main girder erection block 100a. The rigid member 104 is bolted and fixed integrally with a liner plate 125 having the same thickness as the gusset plate 122a (see FIGS. 12 and 13B). As a result, the girder block has a structure in which one end of the pivotable tilting structure 610 is connected to a predetermined portion of the main girder erection block 100a by the hinge member 700 (hinge units 711 and 712).

  Next, FIG. 14 shows a girder block provided with a rotatable transverse member having a structure as a distribution transverse girder. FIG. 14A is a front view of a girder block in which the rotatable lateral member is orthogonal to the main girder installation block, and FIG. 14B is an A1-A2 arrow in FIG. FIG.

  14, this girder block has a main girder erection block 100a and a structure as a distribution girder whose one end is connected to a predetermined part of the main girder erection block 100a by hinge units 721 and 722 (corresponding to the hinge member 700). And a rotatable horizontal member (hereinafter, referred to as a rotatable distribution cross beam) 620. Further, specifically, the rotatable distribution cross beam 620 is configured by a single steel member 621 having an I-shaped cross section similar to the main beam construction block 100a. One end of a bracket extending on both sides across the hinge pin 721a of the hinge unit 721 is bolted and fixed to the end of the abdomen plate 621a of the steel member 621, and the other end extends from the abdomen plate 103 of the main girder erection block 100a. The steel plate 171 is fixed to the belly plate 171a of the steel member 171 by bolting. Similarly, the hinge unit 722 is bolted and fixed to the end of the abdomen plate 621a of the steel member 621 and the abdomen plate 171a of the steel member 171 extending from the abdomen plate 103 of the main girder erection block 100a. Thereby, the said girder block becomes a structure where the one end part of the rotatable distribution cross beam 620 was connected with the predetermined part of the main girder construction block 100a by the hinge member 700 (hinge unit 721,722).

  Note that the upper flange and the lower flange formed on the upper and lower edges of the abdomen plate 621a of the steel member 621 constituting the rotatable distribution horizontal beam 620 are rotatable distribution horizontal with the hinge units 721 and 722 as axes. Steel that extends from the abdominal plate 103 of the main girder erection block 100a in a state in which the rotatable distribution horizontal girder 620 is orthogonal to the main girder erection block 100a or at a predetermined angle so as not to hinder the rotation of the girder 620. The member 171 is obliquely joined to the upper flange and the lower flange (see FIG. 14A).

  The girder bridge is constructed as follows using the girder block having the pivotable transverse member 600 (the pivotable pair tilting structure 610 and the pivotable distribution lateral beam 620) as described above.

  The main girder is constructed by rotating the rotatable horizontal member 600 (rotatable pair tilting structure 610, rotatable distribution horizontal beam 620) around the hinge member 700 (hinge units 711, 712, hinge units 721, 722). Along the block 100a. In this state, the girder block is used as a girder component member C on the girder support structure such as the substructure (abutment 10, piers 11 and 12) and vents 13 and 14 by the girder temporary crane 20 as shown in FIG. It is lifted and mounted. On the girder support structure, the main girder erection block 100a of the girder block is arranged and temporarily fixed so as to have a predetermined positional relationship with respect to the other main girder erection block 100b already installed on the girder support structure. The Then, the rotatable horizontal member 600 (the rotatable pair tilting structure 610, the rotatable distribution horizontal beam 620) is rotated to a predetermined position so as to be orthogonal to the main beam construction block 100a or at a predetermined angle. For example, when the rotatable pair tilting structure 610 is rotated so as to be orthogonal or at a predetermined angle with respect to the main girder erection block 100a, the girder block is in a state as shown in FIG. 12 and FIG. For example, when the rotatable distribution cross beam 620 is rotated so as to be orthogonal to the main beam construction block 100a or at a predetermined angle, the beam block is in a state as shown in FIG. Note that the pivoting operation of the pivotable horizontal member 600 (the pivotable pair tilting structure 610, the pivotable distribution lateral beam 620) is performed manually or with a simple device such as a manual winch or a lever block that can be installed on the main beam construction block. be able to.

  Next, one end of the rotatable transverse member 600 (the rotatable pair tilting structure 610, the rotatable distribution transverse beam 620) that is orthogonal or at a predetermined angle with respect to the main girder erection block 100a is installed in the main girder. The other end is fixed to the other main girder erection block 100b. As a result, the pivotable horizontal member 600 (the pivotable tilting structure 610, the pivotable distributing cross beam 620) becomes a regular horizontal member (the tilting structure, the distributing cross beam), and the main girder construction block 100a and other main beams. It is fixed to the girder construction block 100b.

  For example, the pivotable tilting structure 610 that was in the state shown in FIGS. 12 and 13 is connected to the main girder erection block 100a and the other main girder erection block 100b in the same state as in the states shown in FIGS. It is fixed as a regular anti-tilt. That is, the gusset plate 121a fixed to the end portion of the upper girder erection block 100a and fixed to the end portion of the lower chord member 212 is fixed to the end portion of the main girder erection block 100a, and is in contact with the auxiliary steel member 104 of the main girder erection block 100a. Each of the gusset plates 122a is fixed to the stiffener 104 with a high-strength bolt or the like. The hinge units 711 and 712 that have been fixed with bolts are removed. Further, the gusset plate 121b fixed to the other end portion of the upper chord member 211 is fixed to the auxiliary steel member 104 of the other main girder erection block 100b arranged so as to face the main girder erection block 100a by a high strength bolt or the like, A gusset plate 122b fixed to the other end portion of the lower chord member 212 is fixed to the auxiliary steel member 104 of the other main girder erection block 100b by a high strength bolt or the like. In this way, the pivotable tilting structure 610 is fixed to the main girder erection block 100a and the other main girder erection block 100b in a regular tilting structure.

  For example, the rotatable distribution cross beam 620 that was in the state shown in FIG. 14 has one end as shown in FIG. 15 and the other end in the same state as shown in FIG. It is fixed to the erection block 100a and other main girder erection blocks 100b as regular distribution cross beams. That is, the attachment plates 181a and 181b arranged so as to sandwich the upper flange of the steel member 621 and the upper flange of the steel member 171 extending from the belly plate 103 of the main girder erection block 100a are attached to the upper flange by high strength bolts or the like. It is fixed (see FIG. 15). The contact plates 182a and 182b arranged so as to sandwich the lower flange of the steel member 621 and the lower flange of the steel member 171 are deflected by a high-strength bolt or the like and fixed to the lower flange (see FIG. 15). The hinge units 721 and 722 (see FIG. 14) that have been fixed with bolts are removed, and the attachment is arranged so as to sandwich the end of the abdomen 621a of the steel member 621 and the end of the abdomen 171a of the steel member 171. The contact plates 183a and 183b (not shown) are fixed to the abdominal plates 621a and 171a by high strength bolts or the like. Moreover, in the state similar to the state shown in FIG. 11, the other end of the abdomen plate 621a of the steel member 621 and the abdomen plate 172a of the steel member 172 extending from the abdomen plate 103 of the other main girder installation block 100b, A plurality of attachment plates are fixed with high-strength bolts or the like. In this manner, the rotatable distribution cross beam 620 is fixed to the main girder erection block 100a and the other main girder erection block 100b as regular distribution cross beams.

  Thus, in the construction method of the girder bridge using the girder block (refer to FIG. 12 to FIG. 14) having the pivotable lateral member 600 (the pivotable pair tilting structure 610, the pivotable distribution lateral girder 620), the girder block is concerned. Is mounted on the girder support structure in a state where the rotatable horizontal member 600 (the rotatable pair tilting structure 610, the rotatable distribution horizontal beam 620) is placed along the main girder erection block 100a. After the movable horizontal member 600 (the rotatable pair tilting structure 610, the rotatable distribution horizontal beam 620) is rotated perpendicularly to the main beam construction block 100a or at a predetermined angle, the movable horizontal member 600 is rotated. Since one end portion of 600 (rotatable pair tilting structure 610, rotatable distribution lateral beam 620) is fixed to the main girder erection block 100a, the positioning operation with respect to the main girder erection block 100a is not particularly performed. Member 600 (rotatable counter-tilt 610, Rotating distributor crossbeam 620) the normal transverse member (vs. 傾構, it is possible to fix the dispensing crossbeam) as the main girder erection block 100a. Therefore, the work on the girder support structure can be performed more efficiently. Further, if the rotatable horizontal member 600 is rotated by a substantially predetermined amount, the end of the rotatable horizontal member 600 opposite to the end provided with the hinge member 700 is the other main girder construction block 100b. Since it is positioned in the vicinity of the portion to be fixed, the positioning work for the other main girder erection block 100b is also facilitated. From this point, efficient work is possible.

  A girder block (first embodiment of the present invention) having a hinged transverse member 200 whose basic configuration is shown in FIG. 3 (a), or a pivotable whose basic configuration is shown in FIG. 3 (b). When the girder bridge is constructed using the girder block having the transverse member 600 (second embodiment of the present invention), the main girder erection block and the transverse member are collectively lifted on the girder support structure. Therefore, the lifting operation of the member can be performed more efficiently than the conventional method in which the main girder erection block and the horizontal member are individually lifted and placed.

  The girder block having the structure shown in FIG. 3A is assembled after the first main girder construction block 100a and the second main girder material 100b are brought close to each other and the hinged lateral member 200 is bent. The girder block that is lifted and has the structure shown in FIG. 3 (b) can be lifted after being assembled in the state where the rotatable lateral member 600 is placed along the main girder erection block 100a. The area occupying the space and the volume that occupies the space when it is lifted becomes smaller, so that it is possible to easily lift the girder block even in a relatively small place.

  It should be noted that the number of hinged lateral members 200 (210, 220) to be provided between the first main girder erection block 100a and the second main girder erection block 100b, and the reversible to be coupled to the main girder erection block 100a. The number of the moving lateral members 600 (610, 620) is not particularly limited, and can be appropriately determined according to the interval at which the main girder erection block can be prevented from buckling and the lifting performance of the crane 20 for temporary installation.

  The hinged lateral member 200 (210, 220) and the rotatable lateral member 600 (610, 620) can also be configured in the same girder block. In this case, one end of the hinged transverse member 200 (210, 220) is connected to a predetermined portion of the first main girder erection block 100a by the second hinge member 400 (410, 420) and the hinged transverse member 200 ( 210, 220) is connected to a predetermined portion of the second main girder erection block 100b by a third hinge member 500 (510, 520), and the rotatable lateral member 600 (610, 620) is a hinge. The member 700 (hinge units 711 and 712, hinge units 721 and 722) is connected to another predetermined part of the first main girder erection block 100a.

  When a girder bridge is constructed using a girder block having such a structure, the rotatable lateral member 600 (610, 620) is placed along the first main girder construction block 100a, and the first main girder construction block is constructed. 100a and the second main girder erection block are brought close to each other and the transverse member 200 (210, 220) with hinge is bent, and the spar block is lifted and placed on the girder support structure by the erection crane 20. . Then, on the girder support structure, the first main girder erection block 100a and the second main girder erection block 100b are separated so that the hinged lateral members 200 (210, 220) become straight, and then the hinge As described above, each of the attached transverse member 200 (210, 220) and the rotatable transverse member 600 (610, 620) becomes a regular transverse member (anti-tilt, distributed transverse beam), and the first main girder erection block 100a and the second main girder construction block 100b are fixed.

  Next, a modified example of a method for constructing a girder bridge using a girder block having a hinged lateral member 200 will be described. In this modified example, the first main girder erection block is not made between the first main girder erection block 100a and the second main girder erection block 100b with the hinged lateral member 200 as a regular lateral member. After separating 100a from the second main girder erection block 100b, the hinged lateral member 200 is removed.

  In this case, the digit block is configured as shown in FIG. 16, for example. In FIG. 16, this spar block has a hinged cross member 240 having a spar structure. The transverse member 240 with hinge is composed of two partial members 241 and 242 formed of steel materials having an I-shaped cross section. Stiffeners 241b, 241c, 241d, and 241e are attached to the abdominal plate 241a of one partial member 241 as necessary. Similarly, stiffeners 242b, 242c, 242d, and 242e are attached to the belly plate 242a of the other partial member 242 as necessary. One end of a bracket 341b extending on both sides of the hinge pin 341a of the hinge unit 341 is bolted and fixed to the abdomen 241a of one partial member 241, and the other end is fixed to the abdomen 242a of the other partial member 242 by bolting. Has been. Similarly, the hinge unit 342 is also bolted and fixed to the abdominal plates 241a and 242a of the respective partial members 241 and 242. As a result, the hinged lateral member 240 having a girder structure can be bent by the first hinge member 300 (hinge units 341 and 342) provided at the center thereof.

  One end of a bracket 441b extending on both sides across the hinge pin 441a of the hinge unit 441 is bolted and fixed to the end of the abdomen plate 241a of one partial member 241, and the other end is a complement of the first main girder installation block 100a. The gusset plate 197a fixed to the rigid member 104 is bolted and fixed. Similarly, the hinge unit 442 is bolted and fixed to the end portion of the abdomen plate 241a of the one partial member 241 and the gusset plate 198a fixed to the stiffener 104 of the first main girder construction block 100a. As a result, the girder block has a structure in which one end portion of the hinged horizontal member 240 having a girder structure is connected to a predetermined portion of the first main girder erection block 100a by the second hinge member 400 (hinge units 441 and 442). Become.

  One end of a bracket 541b extending on both sides of the hinge pin 541a of the hinge unit 541 is bolted and fixed to the end of the abdomen plate 242a of the other partial member 242, and the other end is a complement of the second main girder erection block 100b. The gusset plate 197b fixed to the rigid member 104 is bolted and fixed. Similarly, the hinge unit 542 is bolted to the gusset plate 198b fixed to the end portion of the abdomen plate 242a of the other partial member 242 and the stiffener 104 of the second main girder construction block 100a. As a result, the girder block has a structure in which the other end portion of the hinged horizontal member 240 having a girder structure is connected to a predetermined portion of the first main girder erection block 100b by the third hinge member 500 (hinge units 541 and 542). It becomes.

  Using the girder block having the hinged lateral member 240 as described above, the girder bridge is constructed as follows.

  Work is performed according to the above-described procedures (1) to (4). That is, after the girder block having the structure shown in FIG. 16 is assembled on the ground, the first main girder erection block 100a and the second main girder erection block 100b are brought close to each other so that the horizontal member 240 with the hinge is maximized. In a bent state, the hinged lateral member 240, the first main girder erection block 100a, and the second main girder erection block 100b are temporarily fixed. In this state, the girder block is lifted and placed on a girder support structure (such as a substructure) by the girder temporary crane 20. Then, on the girder support structure, the first main girder erection block 100a and the second main girder erection block 100b are pulled apart at a predetermined interval. At this time, the hinged lateral member 240 need not be straight. As will be described later, a distance for separating the first main girder erection block 100a and the second main girder erection block 100b is determined in accordance with a regular transverse member to be attached.

  When the first main girder erection block 100a and the second main girder erection block 100b are separated by a predetermined distance, a regular transverse member (anti-tilt frame, distribution transverse girder) is lifted by the girder temporary crane 20, One end is fixed to a predetermined part of the first main girder erection block 100a, and the other end is fixed to a predetermined part of the second main girder erection block 100b. Thereafter, the hinge units 441 and 442 (second hinge member) connecting the hinged lateral member 240 and the first main girder erection block 100a are removed, and the hinged lateral member 240 and the second main girder are connected. Hinge units 541 and 542 (third hinge members) that have been connected to the erection block 100b are removed. Then, the hinged lateral member 240 is lowered from above the girder support structure to the ground by the girder temporary crane 20.

  Similarly, a predetermined number of regular transverse members are sequentially fixed to the first main girder erection block 100a and the second main girder erection block 100b. At that time, a regular transverse member can be fixed to the portion of the first main girder erection block 100a and the second main girder erection block 100b where the hinged transverse member 240 is fixed (the transverse member Replacement).

  According to such a construction method of the girder bridge, the girder block supports the girder in a state where the first main girder erection block 100a and the second main girder erection block 100b are brought close to each other and the transverse member 240 with the hinge is bent. Since it is placed on a structure (such as a substructure), it is less likely to fall or buckle on the girder support structure than a single main girder construction block. Then, after the first main girder erection block 100a and the second main girder erection block 100b are separated on the girder support structure so as to be at a predetermined interval, a regular transverse member is installed on the first main girder erection block. Since the block 100a and the second main girder erection block 100b are fixed, and the hinged lateral member 240 is removed from the first main girder erection block 100a and the second main girder erection block 100b, the girder block is overturned or sideways. It is possible to fix the regular transverse member to the first main girder erection block 100a and the second main girder erection block 100b while maintaining the state where it is difficult to fall and buckle. Accordingly, measures for preventing the main girder erection blocks 100a and 100b from falling over or buckling over when the main girder is attached to the first main girder erection block 100a and the second main girder erection block 100b. The work load is reduced, and as a result, the work efficiency on the girder support structure can be improved. In addition, since the main girder erection block is difficult to fall or buckle and buckle, the main girder erection block can be made relatively long, thereby reducing the number of vents to be installed and supporting the girder. Since the number of main girder erection blocks to be connected on the structure can be reduced, the work efficiency can be improved also in this respect.

  The hinged lateral member 200 (240) to be finally removed and the rotatable lateral member 600 (610, 620) as shown in FIGS. 3B, 8, 9, and 14 are the same girder block. It can also be configured inside. In this case, one end of the hinged transverse member 200 (240) is connected to a predetermined portion of the first main girder erection block 100a by the second hinge member 400 (hinge units 441 and 442) and the hinged transverse member 200 ( 240) is connected to the second main girder erection block 100b by the third hinge member 500 (hinge units 541 and 542), and the rotatable lateral member 600 (610, 620) is further connected to the hinge member 700 ( Hinge units 711 and 712 and hinge units 721 and 722) are connected to other predetermined portions of the first main girder erection block 100b.

  When a girder bridge is constructed using a girder block having such a structure, the rotatable lateral member 600 (610, 620) is placed along the first main girder construction block 100a, and the first main girder construction block is constructed. In a state in which the hinged lateral member 200 (240) is bent by bringing the 100a and the second main girder erection block closer to each other, the girder block is lifted and placed on the girder support structure by the girder temporary crane 20. Then, on the girder support structure, the first main girder erection block 100a and the second main girder erection block 100b are separated so that the hinged lateral member 200 (240) is at a predetermined interval, and then turnable. As described above, the movable transverse member 600 (610, 620) is a regular transverse member (anti-tilt structure, distributed transverse beam) and is fixed to the first main girder erection block 100a and the second main girder erection block 100b. . Thereafter, the hinged lateral member 200 (240) is removed from the first main girder erection block 100a and the second main girder erection block 100b. In addition, after that, a regular transverse member can be fixed to the first main girder erection block 100a and the second main girder erection block 100b.

  The structure of the hinged lateral member 200 that is detached from the first main girder erection block 100a and the second main girder part 100b after being separated is not limited to the eaves girder structure as described above, but the first main girder erection block 100a. And the second main girder erection block 100b can be appropriately determined, for example, a truss structure or the like if the strength is sufficient to prevent them from falling or buckling.

  In addition, although the example mentioned above was a girder bridge, it can be constructed according to the same method using the same girder block even if it is a box girder bridge.

  As described above, the girder block and the steel bridge erection method using the girder block according to the present invention have the effect that work on the girder support structure can be performed more efficiently, and steel. It is useful as a girder block used for erection of a bridge and a steel bridge erection method using the girder block.

It is a perspective view which shows the structural example of a girder bridge. It is a figure which shows roughly the most common crane vent construction method as a construction method of a steel bridge. It is a figure which shows the basic structural example (a) of the digit block which concerns on the 1st Embodiment of this invention, and the basic structural example (b) of the digit block which concerns on the 2nd Embodiment of this invention. . State (a) before separating the first main girder erection block and the second main girder erection block of the girder block having a hinged lateral member having a structure as an inclined structure and a state (b) It is the top view which looked at from above. Front view showing a hinged transverse member of a girder block in a state in which the first main girder erection block and the second main girder erection block are separated so that the hinged transverse member having a structure as an inclined structure becomes a straight shape FIG. FIG. 6 is a partially cutaway view (a) taken along arrow A1-A2 in FIG. 5, a view (b) taken along arrow A3-A4 in FIG. 5, and a view (c) taken along arrow B1-B2 in FIG. A state (a) before separating the first main girder erection block and the second main girder erection block of the girder block having a hinged transverse member having a structure as a distribution girder and a state in which they are separated ( It is the top view which looked at b) from the upper part. Front side of the hinged transverse member of the girder block in a state in which the first main girder erection block and the second main girder erection block are separated so that the hinged transverse member having a structure as a distribution transverse girder is straight It is a partially cutaway view (b) of the figure (a) and its A1-A2 arrow view. It is a front view which shows the state fixed to the 1st main girder construction block and the 2nd main girder construction block by making the horizontal member with a hinge shown in FIG. 4 thru | or FIG. FIG. 10 is a partially cutaway view (a) taken along arrow A1-A2 in FIG. 9 and a view (b) taken along arrow B1-B2 in FIG. 9. A front view (a) showing a state in which the hinged transverse member shown in FIGS. 7 and 8 is fixed to the first main girder erection block and the second main girder erection block as a distribution girder, and its A1-A2 arrow view FIG. It is a front view of the said rotatable horizontal member in the girder block in which the rotatable horizontal member which has a structure as a tilting structure became the state orthogonal to the main girder construction block or made a predetermined angle. FIG. 13 is a partially cutaway view (a) taken along arrow A1-A2 in FIG. 12 and a view taken along arrow B1-B2 in FIG. Front view (a) of the rotatable horizontal member in the girder block in a state where the rotatable horizontal member having a structure as a distribution horizontal beam is orthogonal to the main girder construction block or at a predetermined angle, and A1 thereof. -It is figure (b) of A2 arrow view. It is a front view (only the left side is shown from a center line) which shows the state which fixed the rotatable horizontal member shown in FIG. 14 to the main girder construction block as a distribution cross beam. It is the front view (a) which shows the structural example of the girder block which has a horizontal member with a hinge of a girder structure, and the partially cutaway figure (b) of the A1-A2 arrow.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Abutment 11, 12 Bridge pier 13, 14 Vent 20 Construction crane 100a 1st main girder construction block (main girder construction block)
100b Second main girder construction block 101 Upper flange 102 Lower flange 103 Abdominal plate 104 Stiffener 121a, 121b, 122a, 122b, 123a, 123b Gusset plate 124b, 125a, 125b Liner plate 200 Hinged lateral member 210 Hinged pair Tilt 211 Upper chord material 211a, 211b Partial material 212 Lower chord material 212a, 211b Partial material 213a, 213b Diagonal material 131, 132, 133a, 133b, 134a, 135a, 135b Joining plate 151a, 151b, 152a, 152b, 153a, 153b, 154a, 154b Joint plate 220 Distributing girder with hinge 221, 222 Cross girder part material 221a, 222b Abdominal plate 300, 310, 320 First hinge member 311, 312, 321, 322 Hinge unit 400 410, 420 Second hinge member 411, 412, 421, 422 Hinge unit 500, 510, 520 Third hinge member 511, 512, 521, 522 Hinge unit 600 Rotating lateral member 610 Rotating counter tilt 611 Upper chord member 612 Lower chord material 613a, 613b Diagonal material 620 Rotatable distribution beam 621 Steel member 711, 712, 721, 722 Hinge unit

Claims (9)

A first main girder erection block and a second main girder erection block disposed opposite to each other;
A transverse member with a hinge that can be bent by a first hinge member provided in the center,
One end of the hinged transverse member is connected to a predetermined part of the first main girder erection block by a second hinge member, and the other end of the hinged transverse member is joined to the second main member by a third hinge member. It is connected to a predetermined part of the girder building block ,
Each of the first hinge member, the second hinge member and the third hinge member has an axis extending in the height direction of the first main girder erection block and the second main girder erection block,
The hinged transverse member can be bent in the extending direction of the first main girder erection block and the second main girder erection block,
The girder block, wherein the first main girder erection block and the second main girder erection block are maintained in parallel in the height direction by the hinged lateral member . One end can be connected to another predetermined part of the first main girder building block by a hinge member, and the other end can be connected to a main girder building block other than the first main girder building block. The hinge member has an axis extending in the height direction of the first main girder erection block, and the rotatable lateral member is rotatable around the axis of the hinge member. digit block according to claim 1, characterized in that a. A main girder erection block; and a rotatable lateral member having a predetermined length, one end of which is connected to a predetermined part of the main girder erection block by a hinge member, and the other end of which can be connected to another main girder erection block. The hinge member has an axis extending in the height direction of the main girder erection block, and the rotatable lateral member is rotatable about the axis of the hinge member. . The step of assembling the spar block according to claim 1, and in the state where the first main girder erection block and the second main girder erection block are brought close to each other, and the hinged lateral member is bent. A step of placing on the girder support structure, and the hinged lateral member is straight on the first main girder erection block and the second main girder erection block in the girder block on the girder support structure The center part of the said horizontal member with a hinge is fixed by a fixing member, the one end part of the said horizontal member with a hinge and the said 1st main girder construction block are fixed, The said horizontal member with a hinge And fixing the second main girder construction block to the other end of the steel bridge. The step of assembling the spar block according to claim 1, and in the state where the first main girder erection block and the second main girder erection block are brought close to each other, and the hinged lateral member is bent. Placing on the girder support structure, and separating the first main girder erection block and the second main girder erection block in the girder block on the girder support structure so as to have a predetermined interval a step, a step of fixing the horizontal member and the first main beam erection block and the second main beam erection block, third with removing said second hinge member from said first main beam erection block be characterized by a step of removing the horizontal member with said hinge from said first main beam erection block and the second main beam erection block by removing the hinge member from the second main beam erection block Steel bridge construction method. The step of assembling the girder block according to claim 2, the girder block, the rotatable transverse member being along the first main girder erection block, the first main girder erection block and the second main girder block A step of placing on the girder support structure in a state where the hinged transverse member is bent close to the girder erection block; and the first main girder erection block in the girder block on the girder support structure And the second main girder erection block are separated so that the hinged transverse member is straight, and the rotatable transverse member is rotated about the hinge member to a predetermined position. A central portion of the horizontal member with hinge is fixed by a fixing member, one end portion of the horizontal member with hinge and the first main girder construction block are fixed, and the other end portion of the horizontal member with hinge and the second Fix the main girder erection block That step and, steel bridge erection method characterized by a step of fixing the one end portion and the first main beam erection block of the adjustable-rotating transverse member. The step of assembling the girder block according to claim 2, the girder block, the rotatable transverse member being along the first main girder erection block, the first main girder erection block and the second main girder block A step of placing on the girder support structure in a state where the hinged transverse member is bent close to the girder erection block; and the first main girder erection block in the girder block on the girder support structure Separating the second main girder erection block from each other at a predetermined interval, rotating the rotatable horizontal member to a predetermined position about the hinge member, and the rotatable horizontal the one end portion and the first main beam erection block member is fixed, and fixing the other end portion and the second main beam erection block of the adjustable-rotating transverse member, said second hinge member And removing from the first main girder erection block 3 and characterized by a step of removing the transverse member with the hinge by removing the hinge member from the second main beam erection blocks from said first main beam erection block and the second main beam erection block Steel bridge construction method. The steel bridge erection method according to claim 7, further comprising a step of fixing a transverse member to the first main girder erection block and the second main girder erection block. A step of assembling the girder block according to claim 3, a step of placing the girder block on a girder support structure in a state where the rotatable lateral member is along the main girder erection block, and the girder support A step of rotating the rotatable horizontal member of the girder block on a structure to a predetermined position around the hinge member; and fixing one end of the rotatable horizontal member and the main girder erection block And a step of fixing the other end of the rotatable lateral member and another main girder erection block,
A steel bridge erection method characterized by:

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