JP2552997B2 - Bridge girder construction method and its 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 girder construction method and an apparatus thereof, and more particularly to a bridge girder construction method and an apparatus thereof capable of constructing a bridge girder by a relatively simplified procedure.

[0002]

2. Description of the Related Art A bridge girder erection method includes an erection girder erection method, and a conventional example of this erection method is shown in FIG. In this bridge girder construction method, the erection girder is temporarily installed between the piers, that is, between the piers,
A method called hanging erection method for drawer construction hung in suspended Ri device girder.

In FIG. 8, reference numeral 1 is a pier constructed in a river with a predetermined span, and a plurality of piers are arranged in the width direction of the river such as a front pier 1a and a rear pier 1b. Two
Is a bridge girder, and has already been installed up to the rear pier 1b. 3 is a steel front vent assembled on the front pier 1a, 4 is a steel rear vent assembled on the rear pier 1b near the tip of the existing bridge girder 2,
5 is an erection girder that is installed and supported between the front vent 3 and the rear vent 4, 6 is a lifting device that is installed on the erection girder 5 and moves along the erection girder 5, and 7 is a span girder 2 A pulling track for pulling out the front and rear vents 8 is a wire rope stretched between these vents and the pier 1 to support the front and rear vents 3, 4.

In this construction, when the bridge girder 2 is to be erected, the front vent 3 is assembled to the front pier 1a, the rear vent 4 is assembled to the rear pier 1b, and the erection girder 5 is extended to the front vent 3. A drawer track is laid on the existing bridge girder 2 on the rear pier 1b. Then, the suspension device 6 suspends the new bridge girder 2 and installs it along the drawer track between the drawer spans. Since a plurality of bridge girders 2 are installed side by side with one span, if one bridge girder 2 is installed, the front and rear vents are shifted in the width direction on each pier 1a, 1b, and the next bridge girder 2 is moved. It will be installed in the same way as the previous bridge girder 2. In this way, by installing bridge girder 2 in each span from one abutment to the other abutment, bridge girder 2
Is erected.

[0005]

However, in such a conventional bridge girder construction method, the bridge girders 2 are sequentially installed in one span, or the bridge girder 2 is installed one more in the front span. For this reason, the front and rear vents must be newly assembled on the front pier 1a and the rear pier 1b, or they must be shifted in the width direction on each pier 1a, 1b. There was a problem of becoming complicated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a bridge girder erection method and an apparatus therefor capable of erection a bridge girder by a relatively simplified procedure. .

[0007]

In order to achieve the above object, the present invention provides a bridge approach section, abutment, pier, and
Rails are laid laterally on the bridge girder , and front and rear columns are movably mounted on each rail prior to erection of the bridge girder so that they can be moved along the rail.
Furthermore, a bridge approach that is further rearward than the rear support
Install a third support on the section , and use the front support and rear support.
The columns can be carried on the desired rails and the bridge girders can be
An erection girder having first and second suspension devices capable of being carried in a span is provided in a front strut, a rear strut, and a third strut.
The gist is a bridge girder erection device that is installed between the columns of the bridge and the bridge girder erection method using it.

[0008]

[ Function ] With the erection girder mounted on the front column
Almost one span to the existing pier ahead of the existing pier.
With the erection girder supported by the front struts and the third struts, the rear struts are moved forward by approximately one span to the tip of the existing bridge girder by the second suspension device, and then the erection girder is moved to the rear struts. While being supported by the third support pillar, the front support pillar is transported forward by one span by the first suspension device to the pier ahead,
Between the piers where the front and rear columns are newly installed ,
Bridge girders will be installed sequentially while moving these front and rear columns laterally on the pier.

[0009]

Embodiments of the present invention will be described below. 1 to 5 are diagrams showing an embodiment of a bridge girder erection device according to the present invention and an execution procedure of a bridge girder erection method using this device.

In these drawings, reference numeral 10 is a bridge approach portion corresponding to a dike, 11 is an abutment provided with the tip end portion of the bridge approach portion 10 solidified with concrete, etc. It is a pier constructed in a river with a span, starting from a first pier 12a provided at a distance of a first span in front of the abutment 11, a second pier 12b, a third pier 12c .... … And so on, a number of them will be constructed side by side in the width direction of the river. 13 is a rail laid on the upper surface of the abutment 11 in the longitudinal direction of the abutment 11 (hereinafter, this is the horizontal direction, and the direction in which the bridge extends is the vertical direction), and 14 is the upper surface of the first pier 12a. A rail laid in the lateral direction, 15 is a rear strut assembled near the tip on the abutment 11, and 16 is a rail 14 on the pier (the first pier 12a in FIG. 1) on the forward side in the bridge erection direction. A front column that is movably mounted along
Reference numeral 17 is a steel vent as a third support post assembled in the rear part on the abutment 11, 18 is an erection girder installed and supported between the front support post 16, the rear support post 15 and the vent 17, 19 and 20 Is a first and second suspension device provided on the erection girder 18 so as to be movable along the erection girder 18, and 21 is a bridge girder, which is installed between the diameters of the rear piers 12.

As shown in FIG. 6, the rear column 15 is composed of two moving bodies 22, which are arranged in pairs at a fixed interval.
23 and a girder receiving beam 24 bridged between these moving bodies 22, 23. The moving bodies 22 and 23 have rollers 25, and sleepers 27 are arranged laterally on a base 26 placed on the installation surface and are placed on rails 28 laid thereon. A roller for vertical movement is placed on the girder receiving beam 24.
29 is arranged , and a supporting iron plate 30 is placed on the vertical movement roller.
Is laid to support the erection girder 18.

A portion of the rail 28 between the moving body 22 and the moving body 23 can be removed. A drawer track 31 is laid vertically on the installation surface between the two moving bodies 22 and 23, and a heavy-weight trolley truck 32 for transporting the bridge girder 21 is installed on the drawer track 31. ing.

As shown in FIG. 7, the front support column 16 comprises a single moving body 33 and a girder receiving beam 34 mounted on the moving body 33. The moving body 33 is a rail 13 or 1 for lateral movement placed on the installation surface on the pier 12.
The lateral movement roller 36 is installed on the No. 4 and is placed on the lateral movement roller 36. The girder receiving beam 34 is the moving body 3
A plurality of them are placed on top of each other on top of each other so that the height dimension of the front support column 16 can be adjusted. Further, a delivery roller 37 that rotates so as to move in the vertical direction is provided on the upper surface of the uppermost girder receiving beam 34a, and the erection girder 18 is supported on the delivery roller 37. Further, a scaffolding deck plate 38 is provided on the upper end portion of the moving body 33 so as to project in the lateral direction, and a plurality of steps 39 for an operator to climb to the scaffolding deck plate are provided on the side surface of the moving body 33. It is provided individually.

As is apparent from FIGS. 6 and 7, the erection girder 18 is formed into a frame structure having a rectangular cross section, and is composed of a truss structure substantially similar to the erection girder 5 shown in FIG. The first and second suspension devices 19 and 2 installed on the erection girder 18
As shown in FIG. 6, the reference numeral 0 designates a suspension device carriage 40, an upper suspension beam 41 provided on the suspension device carrier 40, and center hole jacks attached to both ends of the upper suspension beam 41 in pairs. 42, and a hanging steel rod 43 which extends vertically from the center hole jack 42 and which is attached and lifted up and down by the center hole jack 42,
Lower suspension beam 44 attached to the lower end of the suspended steel rod 43
And a supporting steel rod 45 which is connected to the lower suspension beam 44 and suspends the bridge girder 21. Then, a cargo such as the bridge girder 21 is coupled to the supporting steel rod 45 and the center hole jack 42 is operated to move the bridge girder 21 and the like to the lower suspension beam 44.
Can be hoisted with. In the present invention, the first suspension device 19 or the second suspension device 20 is the bridge girder 21.
Not only the front pillar 16 and the rear pillar 15 are also hung and conveyed.

The operation of the bridge girder erection device having such a configuration will be described below with reference to FIGS. 1 to 5. FIG. 1 is a diagram for explaining a pre-work when the first bridge girder is installed in the first span from the abutment 11 to the first bridge pier 12a. In this case, first place the rear support 15 at a location near the tip of the abutment 11.
The vent 17 is installed on the bridge approach section 10 behind the rear support 15 by a predetermined distance, and the front support 16 is installed on the abutment 11. These stanchions 15, 16 and vents 17 are all constructed by assembling in the initial stage. And both columns 15,
Once the 16 and vent 17 have been constructed, then the rear strut 1
An erection girder 18 is installed between the 5 and the vent 17, and a first suspending device 19 and a second suspending device 20 are installed on the erection girder 18. Then, the erection girder 18 is gradually extended forward of the abutment 11 to reach the first pier 12a.
When the erection girder 18 is extended, in order to prevent the erection girder 18 from becoming unstable and the rearmost part from rising, a lifting prevention device is attached to each of the columns 15 and 16 and the vent 17, and each of the rails 28 and 14 is attached. Alternatively, it is fixed on the installation surface . And the erection girder 18 is the first
When reaching the first pier 12a, the first supporting device 19 suspends and supports the front support column 16 to carry and advance to the first pier 12a, and laterally moves on the rail 14 laid on the first pier 12a. Place it with the roller 36.

Next, the first suspension device 19 is returned to the abutment 11 on the erection girder 18, and the first bridge girder 21 is suspended by the first suspension device 19 and the second suspension device 20, as shown in FIG. It is lowered and carried out from the abutment 11 to the first span, and installed between the abutment 11 and the first pier 12a as shown in FIG. Once the first bridge girder 21 has been erected,
Next, the rear strut 15 and the front strut 16 are moved laterally at their respective positions and positioned at the installation location of the second bridge girder 21. Then, similarly to the case of the first bridge girder 21, the second bridge girder 21 is carried out and installed between the abutment 11 and the first bridge pier 12a. Hereinafter, similarly, bridge girders 21 are erected one after another between the abutment 11 and the first pier 12a.

When the bridge girder 21 has been installed over the first span, the vent 17a is installed near the rear support column 15 and the erection girder 18 is installed on the front support column 1 as shown in FIG.
In the state of being supported by the 6 and the vent 17a, the rear supporting column is transported by the first suspension device 19 by about one span to the tip portion of the existing bridge girder 21 and installed on the rail 28 laid at that position. . Then, the erection girder 18 is gradually extended forward of the first pier 12a to reach the second pier 12b. Then, when the erection girder 18 reaches the second pier 12b, as shown in FIG.
Is supported by the rear support column 15 and the vent 17a, the front support column 16 is suspended and supported by the first suspension device 19 to be transported and advanced from the first pier 12a to the second pier 12b. Rail 14 laid on
It is placed together with the lateral movement roller 36 on a . Same state as when bridging the at which this bridge beam 21 to the previous first span is made in the second span. Therefore, even after the second span, the first
The bridge girder 21 is erected in the same manner as in the span.

[0018]

As described above, according to the present invention, rails are laid so as to extend laterally on the bridge approach section, abutment, pier, and bridge girder, and the front and rear columns are provided on the rails. Prior to the construction of the bridge girder so that it can move along it, it is carried and placed on each occasion, and a third strut is installed on the bridge approach part further rearward than the rear strut, and the front strut and the rear strut are desired. First, the bridge girder can be carried on the rails and the bridge girder can be carried on a desired span.
And the erection girder equipped with the second suspension device is installed between the front column, the rear column, and the third column to form a bridge girder erection device, and the bridge girders are sequentially erected while moving laterally on the pier, since this was further to perform repeatedly in order to erection the first span worth girder of other party, erection work girder is simplified, yet with eliminating wasteful equipment, there is no need to repeat the assembly disassembly of the strut Therefore, various effects can be obtained such that the facility configuration can be simplified.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a bridge girder erection apparatus to which the present invention is applied and a first step in the case of erection of a bridge girder using the same.

FIG. 2 is a front view showing a second step when the bridge girder is erected using the bridge girder erection device of the embodiment.

FIG. 3 is a front view showing a third step of constructing a bridge girder using the bridge girder erection device of the embodiment.

FIG. 4 is a front view showing a fourth step of erection of a bridge girder using the bridge girder erection device of the embodiment.

FIG. 5 is a front view showing a fifth step of constructing a bridge girder by using the bridge girder erection device of the embodiment.

FIG. 6 is a front view showing a configuration of a rear strut used in the embodiment.

FIG. 7 is a front view showing a configuration of a front support column used in the embodiment.

FIG. 8 is a front view showing a conventional bridge girder erection device and its operation state.

[Explanation of symbols]

 11 Abutments 12 Bridge Piers 13 Rails 14 Rails 15 Rear Struts 16 Front Struts 17 Bents (Third Struts) 18 Erection Girders 19 First Suspension Device 20 Second Suspension Device 21 Bridge Girders 22, 23 Mobiles 28 Rails

Claims (2)

(57) [Claims] 1. A bridge approach section, abutment, pier, and
A rail that is laid horizontally extending on the bridge girder and a rail that is laid on the abutment or pier on the side ahead in the bridge erection direction so that the bridge girder can be movably moved along this rail. Destination
It is laid on the front pillar, which is stood and transported each time, and placed on the bridge approach section or bridge girder on the rear side in the bridge erection direction.
And movable bridge girder along the rails on the rail
A rear strut that is transported and placed each time before erection, and a bridge approach behind the rear strut
The third support pillar installed on the section , the front support pillar, the rear support pillar,
And an erection girder that is erected so as to be able to extend forward between the third stanchions, and is movably provided along the erection girder on the erection girder.
The front and rear struts above the desired rail.
It can be transported and can be transported and placed in the desired span.
That first and configure the bridge girder erection device and a second suspension device, piers and erection girder forward strut is placed
Almost one span is extended to the existing pier ahead
When, that allowed <br/> carrying forward of the said second suspension device to the tip portion of substantially only one span component existing bridge girder backward strut while supporting et les transfection girder by the front strut and the third strut process, only one span component forward strut et les transfected girder while supporting the rear strut and a third strut other party of abutments certain had
Is transported and advanced to the pier by the first suspension device.
That step, before uprights and rear struts between newly installed piers,
The process of constructing bridge girders sequentially while moving these front and rear columns laterally on the bridge pier , the above steps, and further constructing the bridge girder for the preceding one span
Bridge girder erection method characterized by being repeatedly performed for 2. A bridge approach section, abutment, pier, and
A rail that is laid horizontally extending on the bridge girder and a rail that is laid on the abutment or pier on the side ahead in the bridge erection direction so that the bridge girder can be movably moved along this rail. Destination
It is laid on the front pillar, which is stood and transported each time, and placed on the bridge approach section or bridge girder on the rear side in the bridge erection direction.
It is possible to move along this rail on the above rail.
A rear strut that is transported and placed each time before erection, and a bridge approach behind the rear strut
The third support pillar installed on the section , the front support pillar, the rear support pillar,
And an erection girder that is erected so as to be able to extend forward between the third stanchions, and is movably provided along the erection girder on the erection girder.
The front and rear struts above the desired rail.
It can be transported and placed, and the bridge girder can be transported to the desired span.
Bridge girder erection apparatus characterized by comprising a first and second hanger tool that.