JPH08218325A - How to repair and regenerate railway bridges - Google Patents

Abstract

(57) [Summary] [Purpose] It is intended to provide a construction method capable of repairing and rehabilitating a railway bridge including maintenance work at low cost without closing the track both day and night. [Structure] When repairing or rehabilitating a railway bridge, a plurality of girder trucks 6 each having a span length between piers 1 and fulcrums are guided and installed on the bridge 1 using the main rail 2 and each girder truck 6 and A support means 10 is provided between the piers 1 to support the load of the girder truck 6 on the pier 1, while the both ends of the girder truck 6 group are connected to the main rails 2 and 1, respectively.
3 is laid and the train 7 is normally run on the temporary rails 9 and 13.
After operating and repairing and / or regenerating the bridge 1 using the working space 11 formed between the girder truck 6 and the bridge pier 1, all the girder trucks 6 can be moved out of the system. And

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of repairing and rehabilitating a railway bridge.

[0002]

2. Description of the Related Art The repair of railway bridges that has been commonly used in the past,
In the case of rehabilitation, the track can be closed at night for small-scale repairs. For large-scale repairs and replacement of dilapidated girders, the tracks must be closed day and night, and vehicles must be operated by temporarily using parallel tracks or temporary bypass bridges must be operated. It was (For example, refer to "Nippon Railroad Facilities Association" November 1994 issue P48-P53)

[0003]

[Problems to be solved by the invention] Repair of conventional railway bridges,
The reproduction method has the following problems. (A) Separate construction of bridge piers, bridge erection work, track laying work, etc. are required in the vicinity of the railway bridge to be repaired or rehabilitated. In order to perform repairs or regeneration including track maintenance work,
The construction itself will take a long time. (B) If there is no location condition where a temporary bridge can be installed, repair and rehabilitation work cannot be performed on the railway bridge, and we have no choice but to resort to long-term track closures or fragmentary nighttime work in which the train does not operate. The construction will be prolonged. (C) The construction cost is very high and uneconomical, the temporary bridge itself is not reliable, and the operation of trains is restricted.

An object of the present invention is to provide a construction method capable of repairing and rehabilitating a railway bridge including maintenance work at low cost without closing the track day and night.

[0005]

The structure of the present invention for solving the problems of the prior art is to repair or rehabilitate a railway bridge having a bridge on which permanent rails can be laid on piers erected at appropriate intervals. At this time, a plurality of girder trucks having span lengths between pier fulcrums are guided and installed on the bridge using the main rail, and a supporting means is provided between each girder truck and each pier to install the girder trucks on the pier. The load is supported, and on the other hand, a temporary rail whose both ends are connected to the main rail is laid on the girder truck group, and is formed between the girder truck and the pier while operating the train normally on this temporary rail. After repairing and / or rehabilitating the bridge using the working space, move all the girders out of the system, lay the temporary rails in advance in the girders, and at appropriate intervals. On the vertically installed bridge pier, When reconstructing a railway bridge with a bridge that can be laid, a plurality of girder trucks with the span length between the pier fulcrums are guided and installed on the bridge using the main rail, and each girder truck is installed between the piers. In order to support the load of the girder trolley on the bridge pier through the support means, on the other hand, a temporary rail for replacement whose both ends are connected to the main rail is laid on the girder trolley, and on this temporary rail is usually While operating the train, the bridge and main rails were removed using the work space formed between the lower surface of the girder trolley and the pier, and then each girder trolley was dropped onto the pier and the girder trolley was left as it was. In addition to the bridge, the temporary rail is used as a new main rail as it is, and the temporary rail (replacement rail) is laid in advance on the girder truck.

[0006]

[Operation] When repairing or rehabilitating a railway bridge on which the main rail is laid, a plurality of girder trucks with span lengths between pier fulcrums are installed on the bridge and removed in a short time using the main rail. Since normal train operation is possible during repair or rehabilitation work, there are almost no constraints on the repair or rehabilitation of bridges including track maintenance work, and the construction period can be greatly shortened. The girder dolly can be used as it is for a new bridge, which can greatly reduce costs and shorten the construction period.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, details of embodiments of the method of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a state where a train is normally operating on a bridge to be repaired or regenerated, FIG. 2 is a front view showing a state where a girder truck is installed on the bridge, and FIG. 3 is a supporting means for the girder truck. Is a front view of a state in which a work space is formed by supporting the bridge on the pier via the bridge and removing the bridge structure main rail, and FIGS. 4 to 11 are explanatory views showing repair and rehabilitation procedures of the railway bridge.

FIGS. 1 and 4 correspond to each other, FIGS. 2 to 5 and 6 correspond to each other, and FIGS. 3 to 7, 8 and 9 correspond to each other. Next, the bridge 1 and the main rail 2 which constitute the railway bridge of the present invention
The reproducing means will be described. The bridge 1 constituting the railway bridge is composed of a plate girder 4 erected on a span between fulcrums of bridge piers 3 erected at appropriate intervals, and a large number of bridge girders 5 having a main rail 2 erected between the plate girders 4 and the like. Has been done. Although the one shown is a girder bridge, the present invention can also be applied to a truss bridge or the like. In the case of a train, a trolley wire (aerial overhead line) is added to FIG. As shown in FIG. 2, a plurality of girder trucks 6 each having a span length between fulcrums of the bridge piers 3 are guided on the bridge 1 using the main rails 2 so that the front and rear ends of the girder trucks 6 face the piers 3. Install. As the guide installation means of the girder truck 6, as shown in FIG. 5, the girder trucks 6 in a loose state are guided one by one, or as shown in FIG. A group is installed by induction. In addition, on the upper surface of the girder truck 6, the main rail 2
Rails 9 for wheels 8 of a train 7 traveling above are provided, and rails 9 formed on the front and rear girder trucks 6 are formed in an upslope and a downslope so as to match the mains installation rail 2, and The wheels 8 of the train running on the rails 2 are configured to be smoothly transferred from the main rails 2 to the rails 9 and vice versa. The shape of the rail 9 may be a grooved rail shape so that the tread surface of the wheel 8 is engaged as shown in the figure, or a rail having the same shape as the main rail 2.

When the group of girder trucks 6 is arranged on the bridge 1 and on the land portion other than the bridge 1 for a required length, a supporting structure or a jack function is provided between the lower surface of the girder truck 6 facing the bridge pier 1 and the upper surface of the pier 3. Each supporting structure 10 is installed to support the load of the girder truck 6 on the pier 1.
Support me. After supporting the girder truck 6 on the pier 3,
The phantom line part of FIG. 3 and the bridge 1 as shown in FIG. 7, FIG. 8 and FIG.
A work space 11 is formed by disassembling and removing a part or all of the main rail 2 and the main rail 2. A separate scaffold (not shown) will be installed if necessary for the dismantling and removal, construction of new bridges and permanent rails, or repair of bridges.
Next, as shown in FIG. 10, the working space 11 is used to renew or repair the bridge 1 or renew the main rail 2. The operation of the train 7 is maintained by using the rails 9 provided on the girder truck 6 during the construction period. After all the regeneration work is completed, the wheels of the girder truck 6 are placed on the new main rail 2a, and the girder truck 6 is moved out of the system. In addition, since the operation of the train 7 is closed for a short time for supporting the girder truck 6 on the pier 1 and removing the girder truck 6, for example, 1: 00
It is desirable to do it during 5:00 AM.

As another application method of the present invention, as shown in FIG. 11, instead of the rail 9, a temporary rail 12 which will eventually become a permanent rail is laid, and the train 7 is normally placed on the temporary rail 12. After dismantling and removing the bridge girder 1 and the old main rail 2 while maintaining operation, the support structure 10 is gradually dismantled and the girder truck 6 is set down on the pier 1, and the girder truck 6 group is used as it is. While constructing a new bridge, the temporary rail 12 is used as a new permanent rail as it is, and the end of the temporary rail 12 is connected to the existing permanent rail 2 on land. In this case as well, since the work of supporting the girder truck 6 on the pier 1 and transferring the girder truck 6 onto the pier 1 requires some time, the operation of the train 7 is closed 1: 0
It is desirable to use the time zone of 0 to 5:00 AM.

[0011]

As described above, according to the structure of the present invention, the following effects can be obtained. (A) When repairing or rehabilitating a railway bridge on which main rails have been laid, a plurality of girder trucks with span lengths between pier fulcrums are installed and removed on the bridge in a short time using main rails. Since normal train operation is possible during repair or rehabilitation work, there are almost no constraints on the repair or rehabilitation of bridges including track maintenance work, and the construction period can be greatly shortened. (B) The girder truck can be used as it is for a new bridge, which can greatly reduce the cost and shorten the construction period.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which a train is normally operating on a bridge to be repaired or regenerated.

FIG. 2 is a front view of a state in which a girder cart is guided and installed on a bridge.

FIG. 3 is a front view showing a state in which a working space is formed by supporting a girder cart on a bridge pier via a supporting means and removing a bridge structure main rail.

FIG. 4 is an explanatory diagram showing a procedure for repairing and regenerating a railway bridge.

FIG. 5 is an explanatory diagram showing a procedure for repairing and regenerating a railway bridge.

FIG. 6 is an explanatory diagram showing a procedure for repairing and regenerating a railway bridge.

FIG. 7 is an explanatory diagram showing a procedure for repairing and regenerating a railway bridge.

FIG. 8 is an explanatory diagram showing a procedure for repairing and regenerating a railway bridge.

FIG. 9 is an explanatory diagram showing a procedure for repairing and regenerating a railway bridge.

FIG. 10 is an explanatory diagram showing a procedure for repairing and regenerating a railway bridge.

FIG. 11 is an explanatory diagram showing a procedure for repairing and regenerating a railway bridge.

[Explanation of symbols]

 1 Bridge 2 Main rail 2a New main rail 3 Pier 4 Plate girder 5 Bridge girder 6 Girder truck 7 Train 8 Wheel 9 Rail 10 Support structure 11 Working space 12 Temporary rail

Claims (4)

[Claims] 1. A span length between pier fulcrums is utilized by repairing or regenerating a railway bridge in which a bridge for laying a main rail is erected on piers erected at appropriate intervals, using the main rail. A plurality of girder trucks are installed on the bridge, and a supporting means is provided between each girder truck and each pier to support the load of the girder truck on the pier, while both ends of the girder truck group are connected to the book. Laying a temporary rail connected to the installation rail,
After operating the train on this temporary rail normally, repair and / or regenerate the bridge using the work space formed between the girder truck and the pier, and then move all the girder trucks out of the system. A method of repairing and rehabilitating railway bridges characterized by the following. 2. The method of repairing and rehabilitating a railway bridge according to claim 1, wherein the temporary rail is laid in advance on a girder truck. 3. When reconstructing a railway bridge in which a bridge for laying a main rail is erected on piers erected at appropriate intervals, a plurality of span lengths between the pier fulcrums are utilized by using the main rail. The girder trucks are installed on the bridge, and each girder truck is supported by supporting means between the bridge piers to support the load of the girder trucks on the bridge piers. A temporary rail for replacement that will be connected is laid, and while the train is operating normally on this temporary rail, the bridge and main rail are removed using the work space formed between the lower surface of the girder truck and the pier. After that, each girder truck is set down on the pier, the girder truck is used as a bridge as it is, and the temporary rail is used as a new main rail as it is. 4. The temporary rail (replacement rail) is previously laid on the girder truck.
How to regenerate the stated railway bridge.