JP3026184B2 - Bridge erection equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge erection apparatus for erection of a plurality of girders between the same diameter.

[0002]

2. Description of the Related Art Conventionally, as a method of erection of a plurality of girders between an abutment and a pier of a bridge or between piers, a method using an upper road type girder has been known. Figures 15-17
FIG. 3 is a view showing a process of erection of five PC girders by this bridge erection method.

As shown in these figures, in this bridge erection method, first, a roller 102 is set on an abutment 4, and the assembled girder 104 is placed on a vertical rail 4a extending in the bridge axis direction. The girder 104 is placed on the traveling carriage 106 and the roller 102 and moved forward in the bridge axis direction until the tip end of the girder 104 reaches the front pier 6. Then, a roller stand 108 is set between the tip of the girder 104 and the pier 6, and a gate girder 11 is attached to a gate girder carriage 110 placed on the girder 104.
Set 2 After that, the girder 104 is moved to the temporary erection position, and a pair of front and rear gate girders 112 are set on the abutment 4 and the pier 6, and each of the trusses 11
Put four. The hydraulic jack 1 of these bridges 112
18, the girder 104 is lifted, and the roller 1
02 and the roller base 108 are removed, the girder 104 is suspended and set.

[0004] Next, the PC girder 2 is lifted by a pair of front and rear gate cranes 116 for lateral movement in a girder manufacturing yard located behind the abutment 4 in the direction of the bridge axis, and laterally moved to a pair of bogies 106 for front and rear. Put on. Then, after the PC girder 2 is moved to the span span by the bogies 106,
The first PC girder 2 is erected by lifting it up with the pair of gate girders 112, moving it laterally to the erection position, and suspending it.

[0005] Thereafter, after the above-described erection step is repeated four times,
The fifth PC digit 2 is temporarily placed on the fourth PC digit 2. Then, the girder 104 is lifted and moved laterally, temporarily placed on the second PC girder 2, and then the fifth P
The C girder 2 is lifted and laterally moved to be installed at a predetermined installation position. Then, the girder 102 is replaced with the fifth PC digit 2
The carriage is placed on the upper carriage 106 and the roller stand on the front pier, and is moved to the next span.

[0006]

However, in the above-mentioned conventional bridge erection method, in order to install one girder, a gate crane for lateral movement which intercepts the girder in a girder manufacturing yard, and a girder is used for connecting the girder. A trolley that moves in the direction and a gate girder that lifts the spar and laterally moves the spar to a predetermined erection position are required, and the work of transferring the spar between the respective steps is required.

For this reason, there is a problem that a large-scale apparatus and many man-hours are required to install a plurality of girders between the same diameters.

The present invention has been made in view of such circumstances, and when a plurality of girders are erected on the same diameter,
It is an object of the present invention to provide a bridge erection apparatus capable of easily performing the girder erection work with a simple configuration.

[0009]

According to the present invention, a predetermined girder elevating and holding device is used. The girder elevating and holding device is provided with the above-mentioned conventional laterally-moving portal crane, bridge-axis traveling truck and lateral-moving portal. The above purpose is achieved by integrating the functions of the digits.

That is, according to the present invention, as set forth in claim 1, in a bridge erection device for erection of a plurality of girders with the same diameter, a girder elevating and lowering holding device for holding an end of the girder so as to be able to go up and down is provided. A lower bogie having the girder lifting and lowering device configured to be able to run on a vertical rail extending in the bridge axis direction and having a horizontal rail formed on the upper surface in a direction orthogonal to the bridge axis; An upper trolley mounted on the upper rail, configured to be able to travel on the horizontal rail, a support frame mounted on the upper trolley, and a girder holder supported by the support frame so as to be able to move up and down. And a jack for raising and lowering the girder holding device.

The specific holding structure of the "girder holder" is not particularly limited as long as it is configured to hold the girder. A holding structure, an engagement holding structure and the like can be adopted.

[0012]

As described above, the bridge erection device according to the present invention includes a girder elevating and holding device that holds an end of a girder so as to be able to ascend and descend.
A lower bogie, which is configured to be able to run on a vertical rail extending in the bridge axis direction and has a horizontal rail formed on the upper surface in a direction perpendicular to the bridge axis, and mounted on the lower bogie, An upper bogie configured to be able to travel, a support frame mounted on the upper bogie, a girder holder supported on the support frame so as to be able to move up and down, and a jack for raising and lowering the girder holder Therefore, it is possible to move in the bridge axis direction and the bridge axis orthogonal direction while holding the end of the girder up and down.

Therefore, by using the two girder lifting and holding devices, the girder is intercepted in the girder manufacturing yard,
A series of erection work can be performed in which the girder is transported in the bridge axis direction to the span of the bridge and the girder is further transported in the orthogonal direction to the bridge axis.

Further, in the girder manufacturing yard, once the both ends of the girder are once held by the pair of girder elevating and holding devices, the girder can be transferred until the work of erection of the girder is completed. It becomes unnecessary.

As described above, according to the invention of the present application, the functions of the conventional lateral moving portal crane, the bridge axial traveling vehicle, and the lateral moving portal girder are integrated in the girder lifting and lowering device. When a plurality of girders are erected over the same diameter, the erection work can be easily performed with a simple configuration. Therefore, it is not necessary to perform the conventional work of moving and mounting the unstable girder for unstable lateral movement and the work of temporarily placing the last girder and girder on the existing girder in the same span,
Further, a gate crane for lateral movement of the girder manufacturing yard is not required.

In the above construction, the support frame is connected to the upper bogie so as to be tiltable about a horizontal axis extending in a direction orthogonal to the bridge axis.
In addition, if the girder holding member is supported so as to be relatively non-rotatable about the horizontal axis with respect to the support frame and is connected to the girder so as to be relatively non-rotatable around the horizontal axis, Even if there is a difference in the holding height for the girder between the girder elevating and holding devices, or even if the vertical rail has a gradient or some unevenness, the lower bogie can be run without derailing from the vertical rail. It is possible to prevent the support frame from falling down in the front-rear direction.

The specific configuration of the "jack" is not particularly limited as long as the girder holder can be moved up and down. Wherein the support frame is supported by the support frame and connected to the upper carriage so as to be tiltable around the same horizontal axis as the support frame. On the other hand, it is possible to prevent the effect obtained by the connection that can be tilted about the horizontal axis in the direction perpendicular to the bridge axis from being reduced by the presence of the jack.

Further, the left and right wings of the lower bogie may be attached to a girder temporarily erected between the erection diameters (temporarily erected between the erection diameters before the erection of the girder). If a receiving beam for supporting the portion is provided, the following operation and effect can be obtained.

That is, since the lower bogie has a configuration in which the girder lifting and lowering device can bridge the plurality of girder, the lower bogie has a horizontally long shape extending long in the direction orthogonal to the bridge axis. For this reason, when the upper bogie is moved from the central portion of the lower bogie to the left and right wing portions in order to install a girder located at the side end portion of the span, the above-mentioned girder located on the girder The posture of the girder elevating and holding device becomes unstable. In this respect, if the left and right wing portions of the lower bogie are supported by the receiving beams, the posture of the girder elevating and holding device on the girder can be stabilized.

In the above construction, the left and right wing portions of the lower bogie are connected to the central portion of the lower bogie so as to be rotatable around an axis extending in the bridge axis direction. With this configuration, the entire length of the lower bogie can be shortened by folding the left and right wing portions, so that the girder elevating and holding device can be easily handled. Also,
If the left and right wing portions are turned downward by 90 ° so as to face right below, the left and right wing portions can be used as a support member when the spar holder is moved up and down. In such a case, the reference position of the girder elevating and lowering device at the time of elevating can be set to a high position, so that when the girder is temporarily installed between the erecting diameters, The erection work can be performed by the girder lifting and lowering device.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing the entire structure of a bridge erection apparatus according to an embodiment of the present invention.

This bridge erection apparatus 10 is constructed by a PC girder 2 shown in FIG.
This is a bridge erection device for erection of five (girders) in the same diameter, each including a pair of girder elevating and holding devices 12 and a girder 14. FIG. 1 shows the bridge erection device 10 described above.
5 is a view showing a state when the PC girder 2 is erected between the abutment 4 and the pier 6.

Each of the girder lifting and lowering devices 12 is provided with a lower carriage 1.
6, an upper carriage 18, a support frame 20, a girder suspender 22 (girder holder), and a hydraulic jack 24 (jack).

A vertical rail 4a extending in the bridge axis direction from the abutment 4 to the girder making yard (not shown) is formed on the upper surface on the abutment 4 side, and the lower bogie 16 moves on the vertical rail 4a. It is configured to be able to run. On the upper surface of the lower bogie 16, a horizontal rail 1 extending in a direction orthogonal to the bridge axis is provided.
6a are formed. The upper trolley 18 is mounted on the lower trolley 16 and is configured to run on the horizontal rail 16a.

The support frame 20 is mounted on the upper carriage 18, and the girder suspender 22 is supported by the support frame 20 so as to be able to move up and down. Further, the hydraulic jack 24 is supported by the support frame 20 so as to raise and lower the girder suspender 22.

Prior to the installation of the PC girder 2, the girder 14 is temporarily installed between the installation diameters. The girder 14 is a member longer than the span between the bridge diameters, and has a vertical rail 14a formed on the upper surface thereof so as to be continuous with the vertical rail 4a.

FIG. 2 is a diagram showing in detail the girder elevating and holding device 12 located on the left side in FIG. Also, FIG.
FIG. 4 is a view taken along the line III-III in FIG. 2, and FIG.
FIG. FIGS. 5 and 6 further illustrate the VV of FIG.
FIG. 6 is a view taken along line VI-VI.

As shown in these figures, the specific structure of the girder lifting and lowering device 12 is as follows.

That is, the lower bogie 16 is formed in a horizontally long shape extending long in the direction orthogonal to the bridge axis, and includes wheels 28 (28A, 28B, 28C) arranged in six rows on the left and right. Of these, a pair of wheels 2 located in the center
Reference numeral 8A denotes a drive wheel driven by a motor 30 in a chain, and a pair of wheels 28B located outside the drive wheel 8B are driven by a motor 32.
, And a pair of wheels 28C located on the outermost side are driven wheels.

The lower carriage 16 is provided at the center 16
A and the central portion 16A at both left and right ends of the central portion 16A so as to be rotatable around an axis Ax1 extending in the bridge axis direction.
6A, and a pair of left and right wing portions 16B connected to 6A. The left and right wing portions 16B are generally aligned with the central portion 16A at a horizontal position that is linear with the central portion 16A.
When the winch 34 is driven by releasing the fixed connection, it can be rotated upward or downward to an arbitrary angular position. The pair of wheels 28A is provided in the central portion 16A, and the other wheels 28B and 28C are connected to the pair of left and right wing portions 1A.
6B. The left and right wing portions 16B
Is configured so that it can be attached to and detached from the central portion 16A.

On the other hand, each wheel 36 of the upper carriage 18 is
It is driven by a motor 38. Also,
A turntable 40 is mounted on the upper carriage 18 so as to be rotatable about the vertical axis Ax2 with respect to the upper carriage 18.

The support frame 20 includes a front vertical portion 20.
a, rear vertical portion 20b, and both vertical portions 20a,
0b at its upper end.
A lower horizontal portion 20d for connecting the vertical portions 20a and 20b in the vicinity of the lower ends thereof;
diagonal member 2 for connecting diagonally with the rear vertical portion 20b
0e, and a generator 58 is mounted at the rear end of the lower horizontal portion 20d. This support frame 2
0 is placed on the upper carriage 18 via the turntable 40. That is, the lower ends of the left and right two portions of the rear vertical portion 20b are connected to the turntable 4
It is connected so as to be able to tilt around a horizontal axis Ax3 extending in a direction orthogonal to the bridge axis with respect to 0.

The hydraulic jack 24 extends vertically in a three-stage configuration.
The support frame 20 is supported by the upper end connecting portion 20c of the support frame 20 through the lower end 2 and is connected to the turntable 40 at the lower end. ing.

The engagement frame 42 is fixed to the upper end of the hydraulic jack 24, and guide rollers 44 are provided at both left and right ends thereof so as to engage with the rear vertical portion 20b of the support frame 20. I have. Thus, the engagement frame 42 moves up and down as the upper end of the hydraulic jack 24 moves up and down by the operation of the hydraulic jack 24.

The connection point of the hydraulic jack 24 to the turntable 40 is determined by the center of the connection point of the rear vertical portion 20b of the support frame 20 to the turntable 40 (the intersection between the axis Ax2 and the axis Ax3). ) Is located. The hydraulic jack 24 is also connected to the rear vertical portion 20.
Similarly to b, it is connected to the turntable 40 so as to be tiltable around a horizontal axis Ax3 in the direction orthogonal to the bridge axis.

The girder suspending tool 22 is connected and fixed to the engaging frame 42 at the rear end of the upper end thereof. A pair of left and right guide rollers 46 is provided at the rear end of the upper end of the girder suspending tool 22 to engage with the rear vertical portion 20b of the support frame 20 from both front and rear sides. On the other hand, the support frame 2
A guide roller 48 is provided which engages with the front vertical portion 20a. These guide rollers 46, 48
Thereby, the lifting of the girder suspending tool 22 with respect to the support frame 20 is smoothly performed, and the displacement of the girder suspending tool 22 in the front-rear direction and the left-right direction and the inclination in the front-rear direction are prevented. .

A pair of front and rear suspension brackets 22a and 22b are formed at the lower end of the girder suspension tool 22, and each of the suspension brackets 22a and 22b has
The horizontally long rectangular blocks 50 and 52 are rotatably connected around an axis Ax4 extending in the bridge axis direction. Then, the rectangular blocks 50 and 52 are brought into contact with the upper surface of the PC girder 2, and each of a pair of left and right brackets 54 previously bolted to both side surfaces of the PC girder 2 and the rear rectangular block 52. Is fixed with a PC steel bar 56,
The PC girder 2 is hung by the girder hanger 22. Thus, the PC girder 2 is swingably suspended around the axis Ax4, and the weight of the PC girder 2 allows the girder lifting and lowering device 12 to be suspended.
Is prevented from falling forward when the rectangular block 50 on the front side contacts the upper surface of the PC girder 2.

FIG. 7 shows that the girder elevating and holding device 12
FIG. 2 is a diagram showing a state where the PC girder 2 is suspended from the position shown in FIG. 1 on an abutment 4.

Next, the configuration of the girder 14 will be described.

FIG. 8 is a view taken along line VIII-VIII in FIG.

As shown in FIGS. 1 and 8, the girder 1
4, a receiving beam 60 is attached to a portion located above and near the pier 6 when the girder 14 is temporarily installed between the installation diameters.

The receiving beam 60 is connected to the girder elevating and holding device 1.
The lower bogie 16 supports the left and right wing portions 16B of the lower bogie 16 and is composed of a pair of oblique beams 62 and a ladder beam 64.

The pair of oblique beams 62 are connected to the girder 14.
Is fixed to the girder 14 so as to protrude obliquely rearward from left and right sides of the ladder beam 6.
4 is mounted on the pair of diagonal beams 62 so as to penetrate the girder 14 in the left-right direction. As shown by the solid line and the two-dot chain line in FIG. It is configured to be movable. On the upper surface of the ladder beam 64, four vertical rails 64a extending in the bridge axis direction are formed. Each of these vertical rails 64a is connected to the lower carriage 16
Are formed at positions corresponding to the wheels 28B and 28C. The girder 14 has a penetrating portion 14b for penetrating the ladder beam 64 and allowing the ladder beam 64 to slide in the bridge axis direction.

When the lower bogie 16 is supported by the receiving beam 60, as shown in FIG. 1, the ladder beam 64 is set at a solid line position, and the tip of the diagonal beam 62 and the pier 6 are connected to each other. The support table 66 is set between them.

Next, the bridge erection apparatus 10 according to this embodiment
Will be described with reference to FIGS.

First, as shown in FIG. 9A, when the assembling of the girder 14 is completed, one girder elevating and holding device 12 is placed on the girder 14 and the girder suspender 22 is fixed to the girder 14. I do. Then, the rear end of the girder 14 is lifted by another girder elevating and holding device 12, and the girder 14 is moved forward on the rail 4a, whereby the girder 14 is moved forward in the bridge axis direction. At this time, the roller 72 is arranged on the upper surface of the abutment 4 and the roller stand 74 is arranged on the upper surface of the pier 6.
4 so that it can be smoothly moved.

As shown in FIGS. 9 (b), 9 (c), 10 (a) and 10 (b), when the girder 14 moves to the temporary erection position, the girder lifting and lowering device mounted on the girder 14 The lower bogie 16 is provided by the hydraulic jack 24
Is lifted together with the upper trolley 18 and the support frame 20, and the left and right wing portions 16B of the lower trolley 16 are bent by the winch 34 so as to face vertically downward, and the tips of the left and right wing portions 16B are attached to the upper surface of the pier 6. Abut. Then, after removing the roller stand 74, the girder 14 is suspended above the abutment 4 and the pier 6 by the girder suspending tool 22 of the double-girder lifting and holding device 12.
Then, after returning the girder elevating and holding device 12 on the girder 14 to the original posture, the receiving beam 60 is set to a state where the lower carriage 16 of the girder elevating and holding device 12 can be supported.

Next, as shown in FIG. 11, in the girder manufacturing yard located behind the abutment 4 in the bridge axis direction,
The PC girder 2 is intercepted by the pair of girder elevating and holding devices 12. This take-over is performed by moving the upper bogie 18 from the center position of the lower bogie 16 in the direction orthogonal to the bridge axis while the lower bogie 16 of each of the girder lifting and lowering devices 12 is mounted on the vertical rail 4a. This is performed by lifting the end of the PC girder 2 with the tool 22 and moving the upper bogie 18 to the center position of the lower bogie 16.
The vertical rail 4a is a wide-gauge rail on which the wheels 28B travel, and therefore, the posture of each girder elevating and holding device 12 at the time of the horizontal take-up becomes stable.

Thereafter, as shown in FIG. 12, the PC girder 2 is lifted and held by the pair of girder elevating and lowering holding devices 12, and the PC girder 2 is connected to the abutment 4 and the pier 6 as shown in FIG.
The PC girder 2 is moved forward in the bridge axis direction until it is located in the middle. When this movement is completed, the lower bogie 16 of the front girder elevating and holding device 12 is supported by the receiving beam 60, and the lower bogie 16 of the rear girder elevating and holding device 12 is formed on the abutment 4. The support by the auxiliary rail 4b is added. In this state, the upper carriage 18 of each of the girder lifting and holding devices 12 is laterally moved to the erection position, and
2, the PC girder 2 is suspended, and the installation of the first PC girder 2 is completed.

Thereafter, the above-described erection step is repeated four times, and four PC girders 2 are erected between the erection diameters as shown in FIG. The rail 2a is laid. The pair of girder lifting and lowering devices 1
2, the girder 14 is moved to the front span (between the pier 6 and the pier 8 in front of it), and then the vertical rail is provided on the upper surface of the front end of the two PC girders 2 near the center. 68a
The girder transfer beam 68 on which is formed is laid.

Next, as shown in FIG. 14, the fifth PC girder 2 is moved to its erection position by the pair of girder elevating and holding devices 12, and the girder transfer beam 68 is removed. The girder 2 is suspended and erected. An auxiliary rail (a short vertical rail similar to the auxiliary rail 4b shown in FIG. 12 (b)) is laid on the upper surface of the front end of the PC girder 2 so that the distance between the abutment 4 and the pier 4 is reduced.
The work of installing the PC girder 2 is completed.

As described in detail above, the bridge erection apparatus 10 according to the present embodiment includes the girder elevating and holding device 12 that holds the end of the PC girder 2 so as to be able to move up and down. A lower bogie 16 configured to be able to run on vertical rails 4a, 14a extending in the bridge axis direction and having a horizontal rail 16a formed on the upper surface in a direction orthogonal to the bridge axis.
And placed on the lower carriage 16, and
a, an upper carriage 18 configured to be able to run on the upper carriage 18, a support frame 20 placed on the upper carriage 18, and a girder suspender 2 supported by the support frame 20 so as to be able to move up and down.
2 and a hydraulic jack 24 for raising and lowering the girder suspender 22
Therefore, it is possible to move the PC girder 2 in the bridge axis direction and the bridge axis orthogonal direction in a state where the end of the PC girder 2 is suspended and held so as to be able to move up and down.

Therefore, the girder lifting and lowering device 12 is
By using the table, the PC girder 2 is intercepted in the girder manufacturing yard, the PC girder 2 is transported in the bridge axis direction to the span span, and the PC girder 2 is further transported in the bridge axis orthogonal direction to the installation position. Construction work can be performed.

Further, in the above-mentioned girder manufacturing yard, once the both ends of the PC girder 2 are suspended and held by the pair of girder elevating and lowering devices 12, the PC girder 2 is maintained until the work of erection of the PC girder 2 is completed. It is not necessary to transfer the digit 2.

As described above, according to the present embodiment, the functions of the conventional portal cranes for lateral movement, the trolleys for moving in the bridge axis direction, and the portal spar for lateral movement are integrated in the girder lifting and holding device 12. Therefore, when a plurality of PC girders 2 are erected between the same diameters, the erection work can be easily performed with a simple configuration. Therefore, it is not necessary to perform the conventional work of moving and mounting the unstable girder for lateral movement and the work of temporarily placing the last girder and girder on the existing girder in the same span. A gate crane for lateral movement in the production yard is also unnecessary.

Further, in the present embodiment, the support frame 20 and the hydraulic jack 24 are connected to the upper bogie 18 so as to be tiltable around the horizontal axis Ax3 in the direction orthogonal to the bridge axis, and The girder hanging tool 2
2 is supported so as to be relatively non-rotatable about the horizontal axis in the direction orthogonal to the bridge axis with respect to the support frame 20;
Since it is configured to be connected to the PC girder 2 so as to be relatively non-rotatable about the horizontal axis, there is a difference in the holding height for the PC girder 2 between the pair of girder elevating and holding devices 12. Also, even in the case where the vertical rails 4a, 14a and the like have a gradient and some irregularities, the lower bogie 16 can travel without derailing from the vertical rails 4a, 14a, and the support frame 20 Falling in the front-rear direction can be prevented.

Further, the lower end portions of the support frame 20 and the hydraulic jack 24 are not directly connected to the upper carriage 18, but are connected to the vertical axis Ax.
Turntable 40 supported to be slidable about two turns
Are connected through the girder elevating and lowering holding device 12
When the torsion moves, even if the twisting occurs between the support frame 20 and the hydraulic jack 24 and the upper bogie 18, the twisting can be absorbed by the rotational sliding action.

Further, in this embodiment, since the holding structure of the PC girder 2 by the girder elevating and holding device 12 is a suspension holding structure by the girder hanger 22, the girder elevating and holding device 12 The holding position for the PC girder 2 becomes lower. Therefore, the center of gravity of the entire movable body when the PC girder 2 is moved while being held by the pair of girder elevating and holding devices 12 can be lowered, whereby the movement stability can be enhanced.

Further, in the present embodiment, since the girder 14 is provided with the receiving beam 60 for supporting the left and right wing portions 16B of the lower bogie 16, the PC girder located at the side end between the bridge diameters is provided. In the girder elevating and holding device 12 on the girder 14, the upper bogie 18 is moved from the central portion 16A of the lower bogie 16 to the left and right wing portions 1 in order to bridge the girders 2.
Even when the girder 6B is moved to the position 6B, the posture of the girder elevating and holding device 12 can be prevented from becoming unstable.

The left and right wing portions 1 of the lower bogie 16
6B is configured to be rotatably connected to a central portion 16A of the lower bogie 16 around an axis Ax1 extending in the bridge axis direction, and when the girder 14 is temporarily erected, In the girder elevating and holding device 12 located at the right and left sides, the left and right wing portions 16A are turned downward by 90 ° and turned directly downward, and these left and right wing portions 16A are used as supporting members when the girder suspenders 22 are raised and lowered. Since the girder is temporarily used, the girder elevating and holding device 12 can be easily used for the temporary installation work of the girder. Also, since the left and right wing portions 16A can be folded upward, the overall length of the lower bogie 16 can be shortened, and the girder lifting and lowering device 12 can be easily handled.

[Brief description of the drawings]

FIG. 1 is a side view showing an overall configuration of a bridge erection apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a detail of a girder elevating and holding device located on the left side in FIG. 1;

FIG. 3 is a view taken along the line III-III in FIG. 2;

FIG. 4 is a view taken along the line IV-IV in FIG. 3;

FIG. 5 is a view taken along the line VV of FIG. 2;

FIG. 6 is a view taken along the line VI-VI of FIG. 2;

FIG. 7 is a view similar to FIG. 1, showing a state when a PC girder is hung on an abutment;

FIG. 8 is a view taken along line VIII-VIII in FIG. 1;

FIG. 9 is a view showing a girder erection process using the bridge erection device (part 1).

10 is a view taken along the line Xa-Xa of FIG. 9 (a) and a view taken along the line Xb-Xb (b) of FIG.

FIG. 11 is a view showing a girder erection process using the bridge erection device (part 2).

FIG. 12 is a diagram showing a girder erection process using the bridge erection device (part 3).

FIG. 13 is a view showing a girder erection process using the bridge erection device (part 4).

FIG. 14 is a view showing a girder erection process by the bridge erection device (part 5).

FIG. 15 is a diagram showing a conventional girder erection process.

16 is a view taken along the line XVI-XVI in FIG.

FIG. 17 is a view similar to FIG. 16, showing a conventional girder erection process;

[Explanation of symbols]

 2 PC girder (girder) 4 Abutment 4a, 14a, 64a, 68a Vertical rail 4b Auxiliary rail 6, 8 Bridge pier 10 Bridge erection device 12 Girder elevating and holding device 14 Girder 14b Penetrating part 16 Lower bogie 16A Central part 16B Left and right wing parts 16a Side Rail 18 Upper trolley 20 Support frame 22 Girder suspender (Girder retainer) 22a, 22b Hanging bracket 26 Hydraulic jack (Jack) 28, 28A, 28B, 28C, 36 Wheel 34 Winch 40 Turntable 42 Engagement frame 44, 46 , 48 Guide rollers 50, 52 Rectangular block 54 Bracket 56 PC steel bar 60 Receiving beam 62 Diagonal beam 64 Ladder beam 68 Girder transfer beam

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E01D 21/00

Claims (5)

(57) [Claims] 1. A bridge erection device for erection of a plurality of girders with the same diameter, comprising a girder elevating and holding device for holding an end of the girder so as to be able to move up and down, wherein the girder elevating and holding device is arranged in a bridge axis direction A lower truck having a horizontal rail formed on the upper surface thereof and extending in a direction perpendicular to the bridge axis; and a lower truck mounted on the lower truck and traveling on the horizontal rail. An upper trolley configured to obtain the trolley, a support frame mounted on the upper trolley, a girder holder supported on the support frame so as to be able to move up and down, and a jack for raising and lowering the girder holder. A bridge erection device, characterized in that: 2. The strut frame is connected to the upper bogie so as to be tiltable around a horizontal axis extending in a direction orthogonal to the bridge axis, and the girder retainer is connected to the strut frame by the horizontal axis. 2. The bridge erection apparatus according to claim 1, wherein the bridge erection apparatus is supported so as to be relatively non-rotatable about the horizontal axis, and is connected to the girder so as to be relatively non-rotatable about the horizontal axis. 3. 3. The jack is supported by the support frame and connected to the upper bogie so as to be tiltable about the same horizontal axis as the support frame.
The bridge erection device according to claim 2, wherein 4. A girder temporarily mounted on the span, the girder being provided with a receiving beam for supporting left and right wing portions of the lower bogie.
3. The bridge erection apparatus according to any one of the above items 3. 5. The left and right wing portions of the lower bogie are connected to a central portion of the lower bogie so as to be rotatable around an axis extending in a bridge axis direction.
4. The bridge erection apparatus according to any one of the above items 4.