JP2008144472A - Position adjustment method and device for connection of bridge girder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and device capable of easily and accurately performing, even if a bridge girder has a weight of several tens of tons, position adjustment in a state with a load of a fraction of the weight. <P>SOLUTION: The position adjustment method for connection of a connecting bridge girder to an existing bridge girder comprises steps of transferring a setting beam with the connecting bridge girder placed thereon over the existing bridge girder; rockably connecting the connecting bridge girder to the setting beam by a second hinge part; connecting the setting beam to the existing bridge girder at a position different from the second hinge part by a first hinge part; pushing the connecting bridge girder together with the setting beam with the first hinge part as a fulcrum; lowering the connecting bridge girder with the first hinge part as the fulcrum in a manner of maintaining a balance by a wire rope while leaving the setting beam; and giving slight rotation to the setting beam with the first hinge part as the fulcrum to adjust the height of the connecting bridge girder. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a position adjustment method at the time of connecting a bridge girder in order to efficiently and safely adjust the position of a connecting part between bridge girders when a long and heavy bridge girder is sequentially connected to constitute a bridge. It relates to the device.

  When building a bridge, the installation space cannot be installed due to topographical conditions such as rivers, canyons, etc., and roadways and railways with restricted traffic blocking, or the installation time is limited. When there is, there are many cases where bridge girder is connected and constructed sequentially by sending out erection method or cantilever erection method.

FIG. 15 shows an example of a conventional cantilever erection method. A rail is laid on a pre-assembled bridge girder 13, and the erection machine 12 is movable on the rail by a moving device 26 at the lower end. In addition, a suspension carriage 18 is movably provided on the upper end of the construction machine 12, and the next connecting bridge girder 13a assembled on the bridge girder 13 is lifted by the wire 19 of the suspension carriage 18, While taking the reaction force with the reaction force wire 21 of the overhanging girder 20 on the base end side, the suspension bridge 18 suspends the connecting bridge girder 13a and conveys it to the overhanging girder 20 on the distal end side of the erection machine 12. This is a method in which the connecting bridge girder 13a is lowered to align the distal end portion of the existing bridge girder 13 with the base end portion of the connecting bridge girder 13a and joined by bolts, welding or the like (Patent Document 1).
Japanese Patent Application Laid-Open No. 2001-20225.

  In the cantilever erection method using the erection machine 12 shown in FIG. 15, the bridge girder 13 needs to support the erection machine 12 and the connecting bridge girder 13a because it is lifted and moved by the erection machine 12 at the tip of the bridge girder 13. Not only does the overall weight increase, but the bridge girder 13 must be reinforced. Further, the erection machine 12 becomes a dedicated device according to the shape, weight, length, etc. of the connecting bridge girder 13a, and the device itself is complicated and expensive. For this reason, there were problems such as high bridge construction costs.

The present applicants have already proposed a new construction method as shown in FIG. 14 in order to solve these problems.
The principle of this erection method will be described. In FIG. 14 (a), reference numeral 13 denotes an existing bridge girder in which unitized bridge girder 13a is sequentially connected. A rail 23 is laid on the bridge girder 13, a carriage 15 is placed on the rail 23, and a connecting bridge girder 13 a to be connected is placed on the carriage 15 upside down. The connecting bridge girder 13a may be preliminarily laid with a rail 23 on the carriage 15 side, or may be laid after being connected to the end of the bridge girder 13.

In FIG. 14 (b), the bridge girder 13 a in an inverted state is conveyed by the carriage 15 to the tip end portion or the connection location of the bridge girder 13. When transported, the first pin plate 24a on the lower side of the hinge 22 is connected to the tip of the upper surface of the bridge beam 13, and the second pin plate 24b on the upper side of the hinge 22 is connected to the tip of the lower surface of the connecting bridge beam 13a. At this time, the axis 25 of the hinge 22 coincides with the vertical lines of the end faces of the bridge girder 13 and the connecting bridge girder 13a.
The hinge 22 may be attached in advance to the tip of the bridge girder 13 or attached to the tip of the connecting bridge girder 13a. Further, the hinge 22 may be attached after the connecting bridge girder 13a is conveyed to the tip of the bridge girder 13 and aligned.

  In FIG. 14C, the connecting bridge girder 13a is pushed up by a hydraulic jack or the like with the shaft 25 of the hinge 22 as a fulcrum. After the center of gravity of the connecting bridge girder 13a is pushed up to a state almost directly above the shaft 25 of the hinge 22, the connecting bridge girder 13a is lowered with stagnation with a wire and rotated 180 degrees. Then, the bridge girder 13 and the connecting bridge girder 13a are in a horizontal state with the rail 23 side as an upper surface. In this state, the joint surfaces are joined to each other by bolts, welding, or the like.

The present applicants have already proposed an embodiment as shown in FIGS. 12 (a) to 12 (e) in which the principle of the above erection method is made more concrete, and will be described in detail below.
In FIG. 12A, a wheel 49 of a carriage 30 is movably mounted on a rail 23 laid on an existing bridge girder 13, and a connecting bridge girder 13a to be connected to a carriage frame / post 31 is connected. Place the connecting end on the right side in the figure. At this time, the hinge 22 is attached in advance to the hinge attachment plate 37 at the tip of the bogie frame and column 31. That is, the connecting bridge girder 13a is placed on the carriage 30 so that the shaft 25 of the hinge 22 and the connecting end of the connecting bridge girder 13a coincide on the vertical line. After the placement, it is desirable to fix the horizontal portion 28b of the second pin plate 24b to the distal end portion of the connecting bridge girder 13a with a bolt in order to ensure work safety and prevent displacement during movement. However, this fixing may be performed after the movement in STEP-1 described later. In addition, the bearing parts 53 and 57 are not connected with the existing bridge girder 13 at this time.

STEP-1 (Transfer the connecting bridge girder 13a and fix it at the tip of the bridge girder 13: FIG. 12 (b))
The carriage 30 on which the connecting bridge girder 13a is mounted is transferred by a well-known transfer device (not shown) such as a self-propelled type or an extrusion method (a method in which the rail 23 is clamped with a clamp device and pushed with a jack). 25 and the connecting end of the bridge girder 13 are aligned on the vertical line. If they match, the horizontal portion 28a of the first pin plate 24a is fixed to the front end portion of the bridge beam 13 with bolts. When the second pin plate 24b is not fixed to the connecting bridge beam 13a, it is fixed at this position. Further, the bearing portion 53 of the clevis main jack 50 is fixed to the upper surface of the bridge girder 13, and the bearing portion 57 of the auxiliary jack 54 is fixed to the upper surface of the bridge girder 13.

STEP-2 (Auxiliary push-up by auxiliary jack 54: FIG. 12 (c))
In this state, pressure oil is applied to the auxiliary jack 54 to push up the left end portion of the connecting bridge girder 13a in the drawing with the shaft 25 of the hinge 22 as a fulcrum. At this time, the clevis main jack 50 is unloaded.
When the connecting bridge girder 13 a is pushed up, the connecting bridge girder 13 a and the carriage 30 are integrally connected by the hinge 22, and are pushed up together, but the lower wheel frame 33 that is not coupled to the dolly frame and column 31 and The wheel 49 is separated and remains on the rail 23.

STEP-3 (main push-up by clevis main jack 50: FIG. 12 (d))
From the state of STEP-2 in which the connecting bridge girder 13a is pushed up by the auxiliary jack 54, the connecting bridge girder 13a is pushed up mainly by the clevis main jack 50 with the shaft 25 of the hinge 22 as a fulcrum. In the state where the center of gravity of the connecting bridge girder 13a coincides with the axis 25 of the hinge 22 on the vertical line, the pushing-up force by the clevis main jack 50 becomes substantially zero.
When the connecting bridge girder 13a is pushed up by the clevis main jack 50, the auxiliary jack 54 remains on the bridge girder 13 side in an unloaded state.

STEP-4 (a pillar is formed by the clevis main jack 50 and the carriage frame and pillar 31: FIG. 12 (e))
From the state of STEP-3, the piston rod 51 of the clevis main jack 50 is further extended with the shaft 25 as a fulcrum, and the length of the clevis main jack 50 is fixed to substantially the same length as the carriage frame / post 31, thereby providing a clevis. A triangular column is formed by a fixed connection point between the main jack 50, the carriage frame / column 31 and the tip of the bridge girder 13. At this time, since the center of gravity of the connecting bridge girder 13a exceeds the axis 25 of the hinge 22, a pulling force H acts on the trunnion jack 38 connected to the fixture 47 via the wire rope 46.

STEP-5 (Pulling with trunnion jack 38)
From the state of STEP-4, the piston rod 39 of the trunnion jack 38 is gradually retracted against the pulling force H by the connecting bridge girder 13a. When the connecting bridge girder 13a is in a vertical state as in STEP-5, the pulling force H applied to the trunnion jack 38 connected via the wire rope 46 gradually increases due to the inclination of the connecting bridge girder 13a.

STEP-6 (Tensioning with trunnion jack 38)
From the state of STEP-5, the piston rod 39 of the trunnion jack 38 is gradually retracted against the pulling force H by the connecting bridge girder 13a. When the connecting bridge girder 13a is in the 45 degree state, the pulling force H further increases on the trunnion jack 38 connected via the wire rope 46.

STEP-7 (the horizontal state of the connecting bridge girder 13a)
From the state of STEP-6, the piston rod 39 of the trunnion jack 38 is gradually retracted against the pulling force H by the connecting bridge girder 13a. Then, as in STEP-7, the connecting bridge girder 13a becomes horizontal, and the end face of the bridge girder 13 and the end face of the connecting bridge girder 13a face each other with a slight gap (about 10 mm).

  In a state where the connecting bridge girder 13a is in horizontal contact with the end of the bridge girder 13, both are coupled by bolts, welding or the like. After the coupling, the fixture 47 is removed from the connecting bridge beam 13a, the piston 39 of the trunnion jack 38 is extended, and the wire rope 46 is returned to its original position. In addition, the piston rod 51 of the clevis main jack 50 is returned to the original position, the carriage frame / post 31 is placed on the wheel frame 33 to return the carriage 30 to the original state, and the bearing portion 53 and the bearing portion 57 are removed from the bridge girder 13. . Further, the horizontal portion 28a and the horizontal portion 28b of the hinge 22 are removed from the bridge beam 13 and the connecting bridge beam 13a.

  The steps from STEP-1 to STEP-7 are repeated to connect the bridge beam 13a to the bridge beam 13 one after another.

According to the bridge erection method as described above, there is an effect that the erection facility is lightweight and simple, and it is possible to provide a bridge erection method that is efficient in assembly work and excellent in safety.
However, due to some problems due to the total manufacturing error of the members that are elements other than the installation method, that is, the total dimensional error such as the width, height and connecting bolt hole of the bridge girder, the connection is attempted. It was found that the position adjustment of the bridge girder is required.
In general, the bridge girder 13 is formed by arranging two or more girder beams 66 having an I-shaped end face and connecting them by a plurality of connecting plates 27. The bridge girder 13 on the fixed side and the connecting bridge girder 13a are connected to each other. As shown in FIG. 13 (a), the contact plates 64 are applied from both sides and connected by bolts 65.
FIG. 13 (b) shows a state in which the girder 661 of the fixed bridge girder 13 and the girder 661 of the connecting bridge girder 13a are displaced by z1 in the height direction and by x1 in the bridge axis direction.
FIG. 13 (c) shows that one girder 661 of the fixed bridge girder 13 and one girder 661 of the connecting bridge girder 13a are positioned by y1 in the lateral direction (direction perpendicular to the bridge axis) and by x1 in the bridge axis direction. The other girder 662 of the fixed bridge girder 13 and the other girder 662 of the connecting bridge girder 13a are displaced by y2 in the lateral direction (direction perpendicular to the bridge axis) and by x2 in the bridge axis direction. Indicates the state.
These misalignments also occur in a state where the x, y, and z directions in FIGS. 13B and 13C are combined.
However, each bridge girder has a weight of several tens of tons, and there is a problem that the position cannot be easily adjusted.

  It is an object of the present invention to provide a method and an apparatus capable of easily and accurately adjusting the position even when each bridge girder has a weight of several tens of tons even under a load of a fraction of that. Is.

The present invention, in the position adjustment method when connecting the connecting bridge girder to the existing bridge girder,
Transferring a setting beam carrying the connecting bridge girder on an existing bridge girder;
A step of swingably connecting the connecting bridge beam and the setting beam via a second hinge part before or after the transfer step;
Connecting the setting beam to the existing bridge beam via a first hinge part at a position different from the mounting position of the second hinge part in the setting beam;
Rotating the first hinge part as a fulcrum and pushing up the connecting bridge girder together with the setting beam;
A step of rotating and lowering the connecting bridge girder with the first hinge part as a fulcrum while leaving the setting beam and rubbing the connecting bridge girder with a wire rope;
And a step of adjusting the height of the connecting bridge girder by applying a slight rotation to the setting beam with the first hinge portion as a fulcrum.

According to invention of Claim 1,
In the position adjustment method when connecting the connecting bridge girder to the existing bridge girder,
Connecting the connecting bridge girder and the setting beam through a second hinge portion so as to be swingable;
Connecting the setting beam to the existing bridge beam via a first hinge part at a position different from the mounting position of the second hinge part in the setting beam;
And a step of adjusting the height of the connecting bridge girder by applying a slight rotation to the setting beam with the first hinge portion as a fulcrum. The height can be adjusted only by giving a slight rotation to the setting beam with the first hinge portion as a fulcrum.

According to the invention of claim 2, in the position adjustment method when connecting the connecting bridge girder to the existing bridge girder,
Transferring a setting beam carrying the connecting bridge girder on an existing bridge girder;
A step of swingably connecting the connecting bridge beam and the setting beam via a second hinge part before or after the transfer step;
Connecting the setting beam to the existing bridge beam via a first hinge part at a position different from the mounting position of the second hinge part in the setting beam;
Rotating the first hinge part as a fulcrum and pushing up the connecting bridge girder together with the setting beam;
A step of rotating and lowering the connecting bridge girder with the first hinge part as a fulcrum while leaving the setting beam and rubbing the connecting bridge girder with a wire rope;
And a step of adjusting the height of the connecting bridge girder by applying a slight rotation to the setting beam with the first hinge portion as a fulcrum. It can be completed in a series of operations from transfer, reverse installation, and height adjustment, greatly improving work efficiency.

  According to the invention described in claim 3, in addition to the height adjusting step, the step of adjusting the connecting bridge girder in the direction of the bridge axis at the second hinge portion can be continuously performed.

  According to the invention described in claim 4, in addition to the height adjusting step, the step of adjusting the connecting bridge girder in the direction orthogonal to the bridge axis by the second hinge portion can be continuously performed.

  According to the fifth aspect of the invention, in addition to the height adjusting step, the step of adjusting the connecting bridge girder in the direction of the bridge axis by the second hinge portion, and the adjustment of the connecting bridge girder in the direction orthogonal to the bridge axis. The process can also be performed continuously.

According to the invention described in claim 6, the position adjusting device at the time of connecting the bridge girder of the present invention,
A first hinge portion attached to an existing bridge girder;
A setting beam rotatably connected to the existing bridge girder by the first hinge portion;
A second hinge part provided at a position different from the first hinge part in the setting beam and rotatably supporting the connecting bridge beam;
Means for giving a slight rotation to the setting beam in order to adjust the height of the connecting bridge beam with the first hinge part as a fulcrum in a state where the connecting bridge beam is connected to the setting beam via the second hinge part. Therefore, the configuration is simple and the position can be adjusted accurately.

  According to the seventh aspect of the present invention, since the second hinge portion includes a rotating shaft for rotatably connecting the setting beam and the connecting bridge beam, the entire apparatus for position adjustment becomes more compact. It is easy to transport, assemble and disassemble the bridge after construction, and reduce the construction cost.

  According to the eighth aspect of the present invention, the second hinge portion includes a rotating shaft for rotatably connecting the setting beam and the connecting bridge beam, a ram chair fitted to the rotating shaft, the ram chair and the setting beam. Since the bridge axis direction adjustment rod that adjusts the position of this setting beam in the direction of the bridge axis is provided, the entire apparatus for position adjustment becomes more compact, transport to the site where the bridge is built, assembly, Disassembly after work becomes easy and construction cost can be reduced.

  According to invention of Claim 9, a 2nd hinge part is a rotating shaft for connecting a setting beam and a bridge girder for connection freely, the ram chair fitted to this rotating shaft, this ram chair, and a setting beam. Between the rotation axis and the ram chair, and between the rotation axis and the ram chair, the ram chair is positioned perpendicular to the bridge axis. Since the direction adjusting rod is provided, the entire apparatus for position adjustment becomes more compact, and transportation to the construction site where the bridge is constructed, assembly, and disassembly after the work are facilitated, and the construction cost can be reduced.

The present invention, in the position adjustment method when connecting the connecting bridge girder to the existing bridge girder,
Connecting the connecting bridge girder and the setting beam through a second hinge portion so as to be swingable;
Connecting the setting beam to the existing bridge beam via a first hinge part at a position different from the mounting position of the second hinge part in the setting beam;
And a step of adjusting the height of the connecting bridge girder by applying a slight rotation to the setting beam with the first hinge portion as a fulcrum.

An apparatus for realizing the method of the present invention is as follows.
A first hinge portion attached to an existing bridge girder;
A setting beam rotatably connected to the existing bridge girder by the first hinge portion;
A second hinge part provided at a position different from the first hinge part in the setting beam and rotatably supporting the connecting bridge beam;
Means for giving a slight rotation to the setting beam in order to adjust the height of the connecting bridge beam with the first hinge part as a fulcrum in a state where the connecting bridge beam is connected to the setting beam via the second hinge part. It is characterized by that.

First, an example will be described in which the position adjusting method and apparatus at the time of bridge girder connection according to the present invention is applied to a method of inverting and installing a bridge girder as shown in FIG. Therefore, the apparatus for inverting and erection is basically the same as that shown in FIG. 12A, but the first and second hinges 67 and 67, which are the most characteristic features of the present invention, will be described later. The difference is that the portion 68 is attached.
In FIG. 1, the connecting bridge girder 13 has two I-shaped unit girder 66 arranged in parallel, connected by a bridge girder connecting member 27, and fixedly installed on the pier. It is a thing. On the upper surface of the bridge girder 13, rails 23 on which a carriage 30 for transporting the connecting bridge girder 13a to be connected are laid.

The bogie 30 is mainly composed of a bogie frame / post 31 that acts as a setting beam at the time of position adjustment, a wheel 49, a trunnion jack 38, a clevis main jack 50, and the like.
The bogie frame and support column 31 is formed of an elongated rectangular frame with two vertical frames 34 and two horizontal frames 35 so as to have a hollow portion 36 inside, and the upper side of the left and right frames is connected to the connecting frame 32. And connected in accordance with the interval between the left and right bridge beams 13. A hinge attachment plate 37 is fixedly attached to the right end of the carriage frame / post 31 in the figure, and the most characteristic first hinge portion 67 and second feature of the present invention are attached to the tip of the hinge attachment plate 37. A hinge portion 68 is attached. The first hinge portion 67 and the second hinge portion 68 are respectively attached to the end portions of the saddle beams 661 and 662 on both sides of the bridge beam shown in FIG.

As shown in FIG. 2, the first hinge portion 67 is integrally attached to a horizontal frame 35 at the right end of the setting beam 31 with a plate-like hinge attachment plate 37 extending vertically and extending in the bridge axis direction. The lower side of the mounting plate 37 is pivotally supported by the shaft 25 while being sandwiched between the two pin plates 24a. The two pin plates 24a are attached to the right end of the bridge girder by the mounting plate 71.
As shown in FIG. 2, the second hinge portion 68 is capable of rotating and swinging a direction adjusting rod 70 perpendicular to the bridge axis while sandwiching the upper side of the hinge mounting plate 37 with two pin plates 24b. The two pin plates 24b are attached to the right end of the bridge beam a by the attachment plate 71. The mounting position of the direction adjusting rod 70 perpendicular to the shaft 25 and the bridge shaft is as follows: a is the distance from the right end of the bridge beam, c is the distance between the shaft 25 and the direction adjusting rod 70 perpendicular to the bridge shaft, and FIG. When the gap between the bridge girder shown and the bridge girder a is d, c = 2a + d is set. Moreover, the distance from the upper surface of the bridge beam of the direction adjustment rod 70 orthogonal to the axis 25 and the bridge axis is set to an equal distance b.

  The second hinge portion 68 will be described in more detail with reference to FIG. 3. A spherical sliding bearing 81 is provided on the hinge mounting plate 37, and a rotary shaft 80 is swingably fitted to the spherical sliding bearing 81. A cylindrical adapter 82 and a head 83 are fixedly attached to both ends of the rotating shaft 80, and a ram chair 76 is placed on each of the adapter 82 and the head 83, so that the adapter 82 and the head 83 can move forward and backward within the fitting hole 79. ing. The adapter 82 and the head 83 are each fixedly attached with a direction adjusting rod 70 orthogonal to the bridge axis, and the tip of the direction adjusting rod 70 orthogonal to the bridge axis is located at the center of each ram chair 76. The nut 78 passes through and protrudes to the outside, and a nut 78 is screwed through a washer. The ram chair 76 has a quadrangular outer shape, engages with a quadrangular sliding hole 75 formed in the two pin plates 24b, and is movable in the bridge axis (x) direction. A bridge shaft direction adjusting rod 69 extending in the x direction is fixedly attached to the center portion of the left and right side surfaces of the ram chair 76 in FIG. 3A, and the end portions of these bridge shaft direction adjusting rods 69 are respectively It penetrates the shaft hole 74 of the support plate 73 integral with the pin plate 24b and protrudes to the outside, and a nut 77 is screwed through a washer. In addition, in order to support the vertical load at the time of the reversal movement of the connecting bridge girder 13 in the rectangular sliding hole 75, the chamfering plate 84 is fitted and removed when it is horizontally reversed as in STEP-7.

One end of a trunnion jack 38 is fixedly attached to one end by a first fixed shaft 40 and a first fixed sheave 43 is rotatably attached to the hollow portion 36 of the bogie frame / post 31 acting as a setting beam. It has been. The other end of the trunnion jack 38 is fixedly attached to a substantially intermediate portion of the hollow portion 36 by a second fixed shaft 41, and a second fixed sheave 44 is rotatably attached. A movement shaft 42 is movably attached to the tip of the piston rod 39 of the trunnion jack 38, and a movement sheave 45 is provided on the movement shaft 42.
A wire rope 46 is stretched over the one first fixed sheave 43, one second fixed sheave 44, and two movable sheaves 45 as shown in FIG. One end is fixed by a fixing tool 47 near the left end of the connecting bridge girder 13a in the drawing, and the other end of the wire rope 46 is fixed by the fixing tool 48 at or near the second fixed shaft 41. And the fixing tool 47 side expands / contracts by a distance four times the expansion / contraction distance of the piston rod 39 of the trunnion jack 38.

  The carriage frame / post 31 is mounted on a wheel frame 33 having a rectangular frame structure, and the rails 23 of the bridge girder 13 are movably mounted by four sets of wheels 49 on the lower surface of the wheel frame 33. In addition, an auxiliary jack 54 is incorporated in advance in the cart 30 near the left end in the figure on the lower surface of the cart frame / support 31. That is, the connecting frame 32 and the wheel frame 33 of the carriage 30 are provided so as to protrude slightly outward, the insertion hole 63 that is perpendicular to the wheel frame 33 and swingable is provided, and the auxiliary jack 54 can swing freely in the insertion hole 63. The upper end portion of the piston rod 55 of the auxiliary jack 54 is connected to the bearing portion 56 on the lower surface of the connecting frame 32 by a shaft 58. In this case, the shaft 58 is detachably locked by the engagement notch of the bearing portion 56.

A method of constructing the connecting bridge girder 13a using the cart 30 configured as described above and further adjusting the position will be described.
STEP-1 (Set bridge girder 13a on bogie frame / post 31: Fig. 1)
In FIG. 1, wheels 49 of a carriage 30 are movably mounted on rails 23 laid on an existing bridge girder 13, and a connecting bridge girder 13 a is placed on the right side of the figure on a carriage frame / post 31. Put it on. At this time, the first hinge portion 67 and the second hinge portion 68 are attached in advance to the hinge attachment plate 37 at the tip of the bogie frame / support 31. That is, the shaft 25 of the first hinge portion 67 and the direction adjusting rod 70 orthogonal to the bridge shaft of the connecting bridge girder 13a coincide on the vertical line, and have a distance a from the end surface of the connecting bridge girder 13a. 13a is placed on the carriage 30. After mounting, it is desirable to fix the mounting plate 72 of the second pin plate 24b to the front end of the connecting bridge girder 13a with bolts in order to ensure work safety and prevent displacement during movement.

  The carriage 30 on which the connecting bridge girder 13a is mounted is transferred by a well-known transfer device (not shown) such as a self-propelled type or an extrusion type (a rail 23 is pushed by a jack while being clamped by a clamp device). When the shaft 25 of the first hinge portion 67 is transferred until it coincides with the distance a from the end face of the bridge girder 13, the mounting plate 71 of the first pin plate 24 a is fixed to the front end portion of the bridge girder 13 with a bolt. When the second pin plate 24b is not fixed to the connecting bridge beam 13a in advance, it is fixed after coming to this position. Further, the bearing portion 53 of the clevis main jack 50 is fixed to the upper surface of the bridge girder 13, and the bearing portion 57 of the auxiliary jack 54 is fixed to the upper surface of the bridge girder 13.

STEP-2 (Auxiliary push-up by auxiliary jack 54: Fig. 5)
In the state of STEP-1, pressure oil is applied to the auxiliary jack 54, and the end of the connecting bridge beam 13a is auxiliary pushed up with the shaft 25 of the first hinge portion 67 as a fulcrum. At this time, the clevis main jack 50 is unloaded.
The push-up capability by the auxiliary jack 54 is as follows.
Here, in FIG. 1, assuming that the weight W of the connecting bridge girder 13a is 25 ton, the length L is 11 m, the position a of the auxiliary jack 54 is 8.5 m, and b is 2.5 m.
w (weight per unit) = W / L = 25 ton / 11 m = 2.3 ton / m
R (reaction force of auxiliary jack 54) = w (a + b) ² /2a=16.4 ton
Therefore, the required jack capacity of the auxiliary jack 54 = (R / 2 main girder) × S (safety factor)
= (16.4 / 2) × 1.5 = 13 ton or more.
When the connecting bridge girder 13a is pushed up, the connecting bridge girder 13a and the carriage 30 are integrally connected by the first hinge portion 67 and pushed together, but are not connected to the dolly frame / post 31. 33 and the wheel 49 are separated and remain on the rail 23.

STEP-3 (main push-up by clevis main jack 50: Fig. 6)
From the state of STEP-2 in which the connecting bridge girder 13a is pushed up by the auxiliary jack 54, the connecting bridge girder 13a is pushed up to 51.4 ° by the clevis main jack 50 with the shaft 25 of the hinge 22 as a fulcrum. The main push-up capability of the clevis main jack 50 is as follows.
w = 2.3ton / m
R = w (a + b) ² /2a=2.3×(6.3+4.7) ² /2×6.3
= 22.1 ton
P = R / sin θ = 22.1 / sin 19.6 ° = 65.9 ton
Therefore, the required jack capacity of the clevis main jack 50 = (P / 2 main girder) × S
= (65.9 / 2) × 1.5 = 50 ton or more.
When the connecting bridge girder 13a is pushed up by the clevis main jack 50, since the shaft 58 is detachably engaged with the engagement notch, the auxiliary jack 54 remains on the bridge girder 13 side in an unloaded state. .

STEP-4 (main push-up by clevis main jack 50: Fig. 6)
From the state of STEP-3, the piston rod 51 of the clevis main jack 50 is extended with the shaft 25 as a fulcrum, and the connecting bridge girder 13a is mainly pushed up to 67.7 °. At this time, the center of gravity of the connecting bridge girder 13a coincides with the axis 25 of the hinge 22 on the vertical line, and the push-up force by the clevis main jack 50 becomes substantially zero.

STEP-5 (Dolly frame / post 31 is set upright at 90 degrees: Fig. 7)
Since the connecting bridge girder 13a is lowered by its own weight from the state of STEP-4, the piston rod 51 is further extended by the pulling ability of the clevis main jack 50 with the shaft 25 as a fulcrum, and the cart frame / support 31 is made to stand upright at 90 degrees. Fix it. At this time, since the center of gravity of the connecting bridge girder 13a exceeds the axis 25 of the hinge 22, a pulling force H acts on the trunnion jack 38 connected to the fixture 47 via the wire rope 46.

STEP-6 (Pulling with trunnion jack 38: Fig. 7)
From the state of STEP-5, the piston rod 39 of the trunnion jack 38 is gradually retracted against the pulling force H by the connecting bridge girder 13a. Then, the inclination of the connecting bridge girder 13a gradually increases.

STEP-7 (Horizontal state of connecting bridge girder 13a: Fig. 7)
From the state of STEP-6, the piston rod 39 of the trunnion jack 38 is gradually retracted against the pulling force H by the connecting bridge girder 13a, the connecting girder 13a becomes horizontal, and the end face of the bridge girder 13 and the connecting bridge girder 13a. Face each other with a gap d between them.
The pulling ability at this time is as follows.
w = 2.3ton / m
V = w (a + b) ² /2a=2.3×(8.0+3.0) ² /2×8.0
= Shaft hole 74ton
T = V / sin θ = shaft hole 74 / sin 47.3 ° = 23.7 ton
H = T × cos θ ₁ = 23.7 × cos 47.3 ° = 16.1 ton
P = H / cos θ ₂ = 16.1 / cos (rotating shaft 80-114.5) = 38.9 ton
Therefore, pulling capacity of the clevis main jack 50 = (P / 2 main girder) × S
= (38.9 / 2) × 1.5 = 30 ton or more Therefore, the necessary capacity of the trunnion jack 38 = (T × 4 hooks / 2 main digits) × S
= (23.7 × 4/2) × 1.5 = 72 tons or more

  If the ends of the bridge girder 13 and the connecting bridge girder 13a are as shown in FIG. 8A, the height (z) direction, the bridge axis (x) direction, and the (y) direction orthogonal to the bridge axis are appropriate. The attachment plate 64 is coupled with an attaching bolt 65 between them. After the coupling, the fixture 47 is removed from the connecting bridge beam 13a, the piston rod 39 of the trunnion jack 38 is extended, and the wire rope 46 is returned to its original position. In addition, the piston rod 51 of the clevis main jack 50 is returned to the original position, the carriage frame / post 31 is placed on the wheel frame 33 to return the carriage 30 to the original state, and the bearing portion 53 and the bearing portion 57 are removed from the bridge girder 13. . Further, the horizontal portion 28a and the horizontal portion 28b of the hinge 22 are removed from the bridge beam 13 and the connecting bridge beam 13a.

Next, position adjustment in the case where positional deviation occurs at the ends of the bridge beam 13 and the connecting bridge beam 13a will be described. The carriage frame / post 31 is a setting beam at the time of position adjustment.
(1) Adjustment in height (z) direction As shown in FIG. 13 (b), when the end of the connecting bridge girder 13a is higher than the bridge girder 13 by z, the trunnion jack 38 is slightly stretched to slightly extend the shaft 25. As shown in FIG. 8C, the setting beam 31 is slightly tilted to the right side in the figure. On the other hand, when it is low, the setting beam 31 is slightly tilted to the left in the figure as shown in FIG. When the heights z1 and z2 of the left and right hand beams 661 and 662 are different from each other, the respective adjustments are performed by the inclination angles of the respective setting beams 31. When one is high and the other is low, adjustment is made by tilting one to the right and the other to the left. Incidentally, when the angle of the setting beam 31 changes by 0.1042 degrees, the end of the connecting bridge beam 13a moves up and down by 1 mm. Note that, since the height is adjusted by rotating about the shaft 25 as a fulcrum, the adjustment of 1 mm changes the gap d by about 0.09 mm, but there is no hindrance to the bolt hole alignment. Further, when the level of the other end portion is also raised and lowered due to the height adjustment of the abutting portion of the connecting bridge girder 13a, the wire rope 46 is adjusted by extending or contracting the trunnion jack 38.

(2) Adjustment in the direction of the bridge axis (x) As shown in FIGS. 13B and 13C, when the end of the connecting bridge girder 13a is shifted from the bridge girder 13 by x in the bridge axis direction (the gap d is 9 (a) and 9 (b), the position is adjusted by shifting the pin plate 24b to the left or right by the nut 77 of the bridge axis direction adjusting rod 69, as shown in FIGS. Specifically, when the connecting bridge girder 13a is shifted to the right side in the drawing, the horizontal component force of the connecting bridge girder 13a is generated in the left direction, so the nut 77 on the right side in FIG. When it is loosened with a force of 3.85 tons, the connecting bridge girder 13a moves to the left side in the figure by its own weight. On the contrary, when the connecting bridge girder 13a is shifted to the left side in the figure, loosening the right nut 77 in FIG. 9 and tightening the left nut 77 with a force of 4.2 ton per bolt, 13a moves to the right side in the figure. When the deviations x1 and x2 between the left and right hand beams 661 and 662 are different, the respective adjustments are performed by the bridge axis direction adjustment rods 69 of the respective second hinge portions 68. If one is wide and the other is narrow, adjustment is made by moving one to the left and the other to the right. At this time, since the rotation shaft 80 is supported by the spherical sliding bearing 81, it can cope with an in-plane inclination.
Incidentally, during the adjustment in the bridge axis (x) direction, the vertical component force of (the connecting bridge beam 13a + the setting beam 31 + the trunnion jack 38 + the clevis main jack 50 + the wire rope 46) is applied to the shaft 25 of the first hinge portion 67. However, the following force is only applied to the rotating shaft 80 of the second hinge portion 68 as a combined component force F0 of the horizontal component force Rh and the vertical component force Rv.
Since F0 ² = Rh ² + Rv ² , horizontal component force Rh = 16.1 ton, and vertical component force Rv = W−V = 7.6 ton, R0 = 17.8 ton.
Further, the force F1 moving in the y direction is set so that the sliding friction coefficient μ between the head 83 of the rotating shaft 80 and the adapter 82 in the fitting hole 79 of the ram chair 76 is 0.04.
F1 = R0 × μ = 17.8 × 0.04 = 0.7 ton
The force when loosening with the nut 77 is Fb = Rh−F1 = 15.4 ton, and since there are four nuts 77 on the left and right, it becomes 3.85 ton per one.
The force when tightening with the nut 77 is Fb = Rh + F1 = the second hinge portion 68ton, and there are four nuts 77 on the left and right, and therefore 4.2 ton per one.

(3) Adjustment in the (y) direction orthogonal to the bridge axis As shown in FIG. 13 (c), when the end of the connecting bridge girder 13a is shifted from the bridge girder 13 in the direction orthogonal to the bridge axis by y. As shown in FIGS. 10A and 10B, the position adjustment is performed by shifting the pin plate 24b to any one of the (y) directions orthogonal to the bridge axis by the nut 78 of the direction adjusting rod 70 orthogonal to the bridge axis. To do. Specifically, when the connecting bridge girder 13a is displaced upward in the figure, the lower nut 77 is loosened with a force of 0.35 ton per bolt, and the upper nut 77 is adjusted to 0.0. When tightened with a force of 35 tons, the connecting bridge girder 13a moves downward in the figure. Conversely, if the connecting bridge girder 13a is shifted downward in the figure, the upper nut 77 is loosened with a force of 0.35 ton per bolt, and the lower nut 77 is 0.35 ton per bolt. When tightened with force, the connecting bridge girder 13a moves upward in the figure. Incidentally, the force F1 that moves in the y direction is 0.04 when the sliding friction coefficient μ of the head 83 of the rotating shaft 80 and the adapter 82 in the fitting hole 79 of the ram chair 76 is 0.04.
F1 = R0 × μ = 17.8 × 0.04 = 0.7 ton,
The force when loosening with the nut 77 is Fb = Rh−F1 = 15.4 ton, and since there are two nuts 78 on the left and right, it becomes 0.35 ton per one.

In the adjustment, since the z direction is a large-scale operation using a jack, the adjustment is performed first and then described in the order of the x direction and the y direction. However, the adjustment order is not limited to this, and the adjustment order may be performed from any direction.
Further, the adjustment may be a combination of two or more, or may be performed several times by combining the z direction, the x direction, and the y direction.

In the first embodiment, the case has been described in which the connecting bridge girder 13a is vertically used and then inverted and installed, but the present invention is not limited to this.
The second embodiment will be described with reference to FIG. 11. The left and right bridge girders 13 are already installed, and the connecting bridge girder 13a is suspended and transported between them by a wire rope 88 of a crane construction. Show.
In this figure, the transported connecting bridge beam 13a is supported by the second hinge portion 68 on the setting beams 85 provided at both ends. The setting beam 85 is pivotally attached to the bridge girder at the first hinge portion 67 at an intermediate portion slightly spaced from the second hinge portion 68, and the other end portion of the setting beam 85 has a height direction. An adjustment jack 86 is attached, and the height direction adjustment jack 86 is connected to a support shaft 87 provided on the bridge girder by a suspension member 89.
Here, the first hinge portion 67 and the second hinge portion 68 have the same structure as that in the first embodiment, and the setting beam 85 is connected to the setting beam 31 of the first embodiment in the height direction adjusting jack. 86 corresponds to the clevis main jack 50, respectively.

In such a configuration,
(1) The height (z) direction is adjusted when the setting beam 85 is slightly rotated by the height direction adjusting jack 86 with the first hinge portion 67 as a fulcrum, and the connection is suspended via the second hinge portion 68. The height of the bridge girder 13a can be adjusted. In this case, a slight rotation of the setting beam 85 causes a shift in the x direction of the connecting bridge beam 13a, but this is extremely small compared to the height adjustment value, and does not cause a problem.
(2) Adjustment of the bridge axis (x) direction;
(3) Adjustment in the (y) direction orthogonal to the bridge axis is not different from that in the first embodiment. Further, since the load of the connecting bridge girder 13a is supported by the first hinge portion 67, the adjustment in the x direction and the adjustment in the y direction can be performed with a light load as in the first embodiment.

  In the second and second hinge portions 68 in the first and second embodiments, the nut 77 and the nut 78 are screwed to the bridge axis direction adjustment rod 69 and the direction adjustment rod 70 orthogonal to the bridge axis, respectively, and the adjustment is performed manually. However, the present invention is not limited to this, and it may be mechanically performed such as a hydraulic jack.

(A) is a front view of STEP-1 (immediately before work start) which shows one Example of the position adjustment method and apparatus at the time of bridge girder connection by this invention. (B) is explanatory drawing of the delivery of the wire rope 46 to the sheave. (A) is an enlarged front view of the first hinge part 67 and the second hinge part 68. FIG. FIG. 2B is a side view of FIG. (A) is a front view of the 2nd hinge part 68. FIG. (B) is the sectional view on the AA line of Fig.3 (a). (C) is the BB sectional drawing of Fig.3 (a). (A) is the front view in which the auxiliary jack 54 by this invention was partially cut off. (B) is a side view in which the auxiliary jack 54 is partially cut away. It is explanatory drawing of STEP-2 of the position adjustment method at the time of bridge girder connection by this invention. It is explanatory drawing of STEP-3 and STEP-4 of the position adjustment method at the time of bridge girder connection by this invention. It is explanatory drawing of STEP-5, STEP-6, and STEP-7 of the position adjustment method at the time of bridge girder connection by this invention. It is for demonstrating the height adjustment method at the time of bridge girder connection by this invention, (a) at the time of no adjustment, (b) at the time of adjustment in the positive direction, (c) at the time of adjustment in the negative direction. It is explanatory drawing. It is for demonstrating the adjustment method of the bridge axis direction at the time of bridge girder connection by this invention, (a) is a front view of the 2nd hinge part 68, (b) is the AA line of Fig.3 (a). It is sectional drawing. It is for demonstrating the adjustment method of the direction orthogonal to the bridge axis at the time of bridge girder connection by this invention, (a) is the sectional view on the AA line of FIG. 3 (a) of the 2nd hinge part 68, (b) ) Is a cross-sectional view taken along the line CC of FIG. It is explanatory drawing which shows Example 2 of the position adjustment method at the time of bridge girder connection by this invention. It is a front view for demonstrating the bridge construction method already proposed. It is explanatory drawing of STEP-1. It is explanatory drawing of STEP-2. It is explanatory drawing of STEP-3. It is explanatory drawing of STEP-4,5,6 and 7. FIG. (A) is a front view of the connection state of the existing bridge girder 13 and the connection bridge girder 13a. (B) is a front view of a state in which the connecting bridge girder 13a is displaced in the height direction with respect to the existing bridge girder 13. FIG. (C) is a front view of a state in which the connecting bridge girder 13a is deviated from the existing bridge girder 13 in a direction perpendicular to the bridge axis direction and the bridge axis. FIG. 4 is an explanatory view of the principle of a bridge erection method and apparatus that has been proposed, in which (a) is when the connecting bridge girder 13a is transported, (b) is when the hinge 22 is connected, and (c) is the connecting bridge girder 13a. It is explanatory drawing at the time of rotation. It is explanatory drawing of the conventional cantilever erection method.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 12 ... Construction machine, 13 ... Bridge girder, 14 ... Production yard, 15 ... Carriage, 16 ... Bridge pier, 17 ... Endless belt transfer device, 18 ... Hanging cart, 19 ... Wire, 20 ... Overhang girder, 21 ... Reaction force wire, 22 ... Hinge, 23 ... Rail, 24 ... Pin plate, 25 ... Shaft, 26 ... Moving device, 27 ... Bridge girder connecting member, 30 ... Dolly, 31 ... Dolly frame and column (setting beam), 32 ... Connecting frame, 33 ... Wheel frame, 34 ... vertical frame, 35 ... horizontal frame, 36 ... hollow portion, 37 ... hinge mounting plate, 38 ... trunnion jack, 39 ... piston rod, 40 ... first fixed shaft, 41 ... second fixed shaft, 42 ... Moving shaft, 43 ... first fixed sheave, 44 ... second fixed sheave, 45 ... moving sheave, 46 ... wire rope, 47 ... fixing tool, 48 ... fixing tool, 49 ... wheel, 50 ... clevis main jack, 51 ... pi Tonrod, 52 ... Bearing part, 53 ... Bearing part, 54 ... Auxiliary jack, 55 ... Piston rod, 56 ... Bearing part, 57 ... Bearing part, 58 ... Shaft, 59 ... Engagement piece, 60 ... Engagement notch, 61 ... Wheel cover, 62 ... Rotating pin, 63 ... Insertion hole, 64 ... Connecting plate, 65 ... Bolt, 66 ... Girder, 67 ... First hinge part, 68 ... Second hinge part, 69 ... Adjustment rod in the bridge axis direction , 70 ... Adjustment rod in a direction orthogonal to the bridge axis, 71 ... Mounting plate, 72 ... Mounting plate, 73 ... Support plate, 74 ... Shaft hole, 75 ... Sliding hole, 76 ... Ram chair, 77 ... Nut, 78 ... Nut , 79 ... fitting hole, 80 ... rotating shaft, 81 ... spherical sliding bearing, 82 ... adapter, 83 ... head, 84 ... filling plate, 85 ... setting beam, 86 ... height direction adjusting jack, 87 ... support shaft , 88 ... Crane wire rope, 89 Hanging material.

Claims (9)

In the position adjustment method when connecting the connecting bridge girder to the existing bridge girder,
Connecting the connecting bridge girder and the setting beam through a second hinge portion so as to be swingable;
Connecting the setting beam to the existing bridge beam via a first hinge part at a position different from the mounting position of the second hinge part in the setting beam;
And a step of adjusting the height of the connecting bridge girder by applying a slight rotation to the setting beam with the first hinge portion as a fulcrum. In the position adjustment method when connecting the connecting bridge girder to the existing bridge girder,
Transferring a setting beam carrying the connecting bridge girder on an existing bridge girder;
A step of swingably connecting the connecting bridge beam and the setting beam via a second hinge part before or after the transfer step;
Connecting the setting beam to the existing bridge beam via a first hinge part at a position different from the mounting position of the second hinge part in the setting beam;
Rotating the first hinge part as a fulcrum and pushing up the connecting bridge girder together with the setting beam;
A step of rotating and lowering the connecting bridge girder with the first hinge part as a fulcrum while leaving the setting beam and rubbing the connecting bridge girder with a wire rope;
And a step of adjusting the height of the connecting bridge girder by applying a slight rotation to the setting beam with the first hinge portion as a fulcrum. In the position adjustment method when connecting the connecting bridge girder to the existing bridge girder,
Connecting the connecting bridge girder and the setting beam through a second hinge portion so as to be swingable;
Connecting the setting beam to the existing bridge beam via a first hinge part at a position different from the mounting position of the second hinge part in the setting beam;
Adjusting the height of the connecting bridge beam by giving a slight rotation to the setting beam with the first hinge portion as a fulcrum;
A method of adjusting the position when connecting the bridge girder, comprising the step of adjusting the connecting bridge girder in the direction of the bridge axis at the second hinge portion before or after the height adjusting step. In the position adjustment method when connecting the connecting bridge girder to the existing bridge girder,
Connecting the connecting bridge girder and the setting beam through a second hinge portion so as to be swingable;
Connecting the setting beam to the existing bridge beam via a first hinge part at a position different from the mounting position of the second hinge part in the setting beam;
Adjusting the height of the connecting bridge beam by giving a slight rotation to the setting beam with the first hinge portion as a fulcrum;
A method for adjusting the position at the time of connecting the bridge girder, comprising the step of adjusting the connecting bridge girder in a direction orthogonal to the bridge axis by the second hinge part before or after the height adjusting step. In the position adjustment method when connecting the connecting bridge girder to the existing bridge girder,
Connecting the connecting bridge girder and the setting beam through a second hinge portion so as to be swingable;
Connecting the setting beam to the existing bridge beam via a first hinge part at a position different from the mounting position of the second hinge part in the setting beam;
Adjusting the height of the connecting bridge beam by giving a slight rotation to the setting beam with the first hinge portion as a fulcrum;
A step of adjusting the connecting bridge girder in the direction of the bridge axis by the second hinge portion before or after the height adjusting step;
Before or after the height adjusting step or the bridge axis direction adjusting step, the step of adjusting the connecting bridge girder in a direction orthogonal to the bridge axis by the second hinge portion, Adjustment method. A first hinge portion attached to an existing bridge girder;
A setting beam rotatably connected to the existing bridge girder by the first hinge portion;
A second hinge part provided at a position different from the first hinge part in the setting beam and rotatably supporting the connecting bridge beam;
Means for giving a slight rotation to the setting beam in order to adjust the height of the connecting bridge beam with the first hinge part as a fulcrum in a state where the connecting bridge beam is connected to the setting beam via the second hinge part. A position adjustment device for connecting a bridge girder characterized by the above.   The position adjusting device for connecting a bridge girder according to claim 6, wherein the second hinge part includes a rotating shaft for rotatably connecting the setting beam and the connecting bridge girder.   The second hinge portion bridges the setting beam between the rotating shaft for rotatably connecting the setting beam and the connecting bridge girder, the ram chair fitted to the rotating shaft, and the ram chair and the setting beam. The position adjusting device for connecting a bridge girder according to claim 6, further comprising a bridge axis direction adjusting rod for adjusting the position in the axial direction.   The second hinge portion bridges the setting beam between the rotating shaft for rotatably connecting the setting beam and the connecting bridge girder, the ram chair fitted to the rotating shaft, and the ram chair and the setting beam. A bridge axis direction adjusting rod for adjusting the position in the axial direction, and a direction adjusting bar orthogonal to the bridge axis for adjusting the position of the ram chair in a direction orthogonal to the bridge axis are provided between the rotating shaft and the ram chair. The position adjustment apparatus at the time of bridge girder connection of Claim 6 characterized by the above-mentioned.

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