JP2001241012A - Bridge removal and construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bridge removal and construction method that helps reduce a construction period and lower cost by enabling use of a small capacity moving device such as a lifting device by making both bridges bear the other party's weight when removing the old bridge and constructing the new bridge. SOLUTION: In a bridge removal and construction method by which an old bridge 2 is removed and a new bridge 4 is constructed between abutments 1 and 1, new bridge component members unloaded in the vicinity 8 of the abutments of the old bridge 2 are constructed by moving blocks 4A, 4B... with a cart 5 or the like to a construction position, and while supporting the old bridge 2 by the new bridge 4, after the old bridge 2 are cut on a block by block basis and carried out of the site, the new bridge 4 is lowered to the construction position and constructed. As carrying in and construction of the new bride 4 and removal of the old bridge 2 can be performed with a small capacity moving device, installation of the moving device does not require extensive work, the term of works can be reduced significantly, cost can be lowered, a traffic congestion is not invited. In addition, when disassembling the old bridge 2, the new ridge 4 is used effectively to bear the load of the old bridge 2 and support, the safety of work can be secured even with a lower capacity working machine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for removing and erection of a bridge for removing an old bridge and erection of a new bridge.

[0002]

2. Description of the Related Art Conventionally, when a new bridge is to be installed in place of an old bridge, a lifting device having a large lifting capacity such as a mobile crane or a cable crane is used. The bridge of the new bridge was installed using a cable crane.

[0003]

In such a conventional bridge removal and erection method, a new bridge is erected after the old bridge is removed. Therefore, the components of the new bridge may be block-by-block or the entire bridge may be directly cranes or the like. It is necessary to carry out the erection work using a lifting device. For this reason, all of the weight of the lifted new bridge component is hung on the lifting device, so that a lifting device having a large lifting capacity such as a mobile crane or a cable crane has to be used. Depending on the topography and conditions of the place where the bridge is to be installed, a lot of construction time and construction costs may be required for the installation of a lifting device with large lifting capacity, and in the case of installation using a road, the installation of the bridge including the installation of a crane truck is required. Even during the construction, significant traffic restrictions had to be made during operation of the lifting device with a large lifting capacity, which did not work well, and work efficiency had to be reduced.

Accordingly, the present invention solves the above-mentioned problem of removing and erection of a conventional bridge, and when removing an old bridge and temporarily constructing a new bridge, each other bears its own weight on the other side to lift a small capacity. It is an object of the present invention to provide a method for removing and erection of a bridge which enables use of a moving device such as a device to shorten a construction period and reduce costs.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for removing or erection of a bridge for removing an old bridge and erection of a new bridge, the whole or a block of the new bridge components unloaded on and near the old bridge. Every time, move to the erection position with a crane or a trolley, temporarily construct, support the old bridge with the new bridge, cut the old bridge into blocks and carry it out, then lower the new bridge to the erection position and erection It is characterized by the following. In addition, the present invention provides for the removal of old bridges and the construction of new bridges.
In the erection method, the new bridge component is moved to the erection position below the old bridge for each block, temporarily supported by the old bridge, and the old bridge is supported and the old bridge is cut for each block. After carrying out, the new bridge is raised to the erection position and erected, and these are used as means for solving the problem.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of a bridge removal and erection method according to the present invention. According to the present invention, in the removal and erection method of a bridge for removing the old bridge 2 on the abutment 1 and erection of the new bridge 4, the new bridge components unloaded onto the vicinity 8 of the abutment of the old bridge 2 are divided into blocks 4 A, 4 B, .. (2 blocks in the example shown, a large number of blocks are prepared in the case of a long bridge) are moved to the erection position by the bogie 5 and temporarily provided, and the old bridge 2 is supported by the new bridge 4 After cutting the old bridge 2 into blocks and carrying it out, the new bridge 4 is lowered to the erection position and erected. 1 (A) to 1
The method for removing and erection of the bridge according to the present embodiment will be described below in detail with reference to FIG. As shown in FIG. 1 (A), the bridge of the old bridge 2 is installed in a form of bridging between the abutments 1 and 1, and the old bridge 2 (truss bridge) is installed. On the abutment 8 near the abutment, the unloading crane with a capacity of about 15 t (not shown) or the like is used to block 4A of the new bridge component,
4B are respectively unloaded.

As shown in FIG. 1 (B), the unloaded new bridge components are moved from the blocks 4A, 4B. As shown in FIG. 1 (C), while being supported by jacks and the like at each erection position, the bogie 5 is removed and lowered onto the abutment 1 to connect the blocks 4A, 4B. Is temporarily fixed to the abutment 1 in an appropriate form (for example, with an L-shaped bracket or the like). A temporary material 7 constituting a scaffold and the like is attached to the lower part of the old bridge 2, and the new bridge 4, the old bridge 2 and the temporary material 7 are surrounded by chains 6 and the like at a number of places, and the old bridge 4 Support Bridge 2.
Next, as shown in FIG. 1 (D), the old bridge 2 and the old truss 3 are disassembled into small blocks under the holding of the temporary members 7 supported on the new bridge 4 via the chains 6 and the like. It is carried out by a crane or the like (or a trolley).

When the removal of the old bridge 2 and the old truss 3 is completed, as shown in FIG. 1E, the temporary material 7 of the new bridge 4 temporarily installed on the abutment 1 is released, and a simple jack device or the like is used. As shown in FIG. 1 (F), the new bridge 4 is lowered or taken over to a proper erection position to complete the erection of the bridge. (The temporary material 7 may be removed after the completion of the bridge construction.) With this configuration, the new bridge 4 can be carried in, constructed and the old bridge removed, even with a lifting device having a small capacity. A large-scale operation is not required for installing the lifting device, the construction period can be significantly reduced, the cost is reduced, and traffic congestion is not caused. In addition, when the old bridge 2 is dismantled, the new bridge 4 can be effectively used to bear and support the load of the old bridge 2, and work safety can be ensured even if the capacity of the work machine is reduced.

FIG. 2 shows a second embodiment of the method for removing and erection of a bridge according to the present invention. As shown in FIG. 2 (A), the bridge of the old bridge 2 is installed in a form of bridging between the abutments 1 and 1, and the old bridge 2 (truss bridge) is installed. As shown in FIG. 2 (B), the unloaded unloading new bridge components are connected to the old bridge 2 by the carts 5 by the blocks 4A, 4B,.
Is moved to each erection position on the abutment 8 near the abutment, and unlike the first embodiment, as shown in FIG. 2 (C), without removing the trolley 5 at each erection position, Blocks 4A, 4B ... are connected together, and Shimbashi 4
Is temporarily fixed to the abutment 1 in an appropriate form (for example, with an L-shaped bracket or the like). Then, a temporary material 7 constituting a scaffold or the like is attached to the lower part of the old bridge 2, and the new bridge 4,
The old bridge 2 and the temporary material 7 are surrounded by chains 6 and the like at many places, and the new bridge 4 supports the old bridge 2.

Next, as shown in FIG. 2D, the old bridge 2 and the truss 3 are disassembled into small blocks while holding the temporary members 7 supported on the new bridge 4 via the chains 6 and the like, and compared. It is carried out by a small crane. When the removal of the old bridge 2, the truss 3, and the temporary materials 7 is completed, the temporary construction of the new bridge 4 temporarily provided on the abutment 1 is released, and the bogie 5 is removed from the new bridge 4, as shown in FIG. Using a simple jack device or the like, as shown in FIG.
Is lowered to the proper erection position or intercepted to complete the erection of the bridge. With this configuration, as in the case of the first embodiment, the loading, erection, and removal of the old bridge can be performed with a small-capacity lifting device, as in the case of the first embodiment. Without the need for extensive work,
The construction period can be significantly reduced, the cost can be reduced, and traffic congestion does not occur. In addition, when the old bridge 2 is dismantled, the new bridge 4 can be effectively used to bear and support the load of the old bridge 2, and work safety can be ensured even if the capacity of the work machine is reduced. Furthermore, in the present embodiment, when the new bridge 4 is fully erected, the bogie 5 is removed and the new bridge 4 is lowered by jacks or the like, so that only one descent operation is required, and the work period is further shortened.

FIG. 3 shows a third embodiment of the bridge removal and erection method according to the present invention. As shown in FIG. 3 (A), the bridge of the old bridge 2 is installed in a form of bridging between the abutments 1 and 1. As shown in FIG. 3 (B), the end members 4T, 4T are temporarily installed on the abutments 1 at both ends of the unloaded Shinbashi constituent members, and as shown in FIG. 3 (C), the Shinbashi constituent members Move to the erection position below the old bridge 2 (may be a crane or a cable winch) for each of the blocks 4A, 4B,... Disposed between the end members 4T, 4T. , The old bridge 2 and the temporary material 7 are surrounded by chains 6 and the like at many places, and the new bridge 4 supports the old bridge 2 while each block 4T, 4A, 4B,.
Connect them together and make them temporary. At this time, the old bridge 2 also functions as a scaffold for the temporary construction of the new bridge 4.

Next, as shown in FIG. 3 (D), while the lower part is supported by the temporary new bridge 4, the old bridge 2 and the old truss 3 are disassembled into small blocks using the new bridge 4 as a scaffold and compared. It is carried out by a small crane. When the removal of the old bridge 2 and the old truss 3 is completed, as shown in FIG. 3 (E), the temporary members of the end member 4T and the new bridge 4 which are temporarily provided on the abutment 1 are released, and the block 4 is removed using a jack device or the like.
After raising A and 4B and aligning them with the end members 4T and 4T, as shown in FIG. 3 (F), the new bridge 4 is lowered or intercepted to complete the erection of the bridge. With this configuration, the loading of the new bridge 4 and the temporary construction of the old bridge 2
It is possible to safely remove the old bridge 2 on the temporary new bridge 4 without the need for a large crane.
The construction period can be significantly reduced, the cost can be reduced, and traffic congestion does not occur.

The embodiments of the present invention have been described above. However, within the scope of the present invention, the shapes and types of abutments, old bridges and new bridges, lifting devices for unloading components of the new bridge, and trucks The shape, type, type of temporary materials, the shape and type of temporary materials, the shape, type and support form of chains and other supporting members for supporting the new bridge with the old bridge and the temporary materials, the temporary form of the new bridge, the old bridge The form of dismantling and removal of the bridge, the form of descent or ascending of the new bridge, and the form of erection can be appropriately selected.

[0014]

As described above in detail, according to the present invention, in the removal and erection method of a bridge for removing an old bridge and constructing a new bridge, a new bridge unloaded on and near the old bridge is constructed. After moving the members to the erection position with a crane or a trolley etc. in whole or in blocks for each block, temporarily supporting the old bridge on the new bridge, cutting the old bridge for each block, and carrying it out,
By lowering and erection of the new bridge to the erection position, it is possible to carry in the new bridge, erection and removal of the old bridge even with a small-capacity mobile device, so no major work is required to install the mobile device. In addition, the construction period can be significantly reduced, the cost can be reduced, and traffic congestion is less likely to occur. Moreover,
When the old bridge is dismantled, the new bridge can be effectively used to bear and support the load of the old bridge, and work safety can be ensured even if the capacity of the work machine is reduced.

[0015] In the removal and erection method of a bridge for removing an old bridge and erection of a new bridge, the new bridge constituent members are moved to the erection position under the old bridge for each block and temporarily supported by the old bridge. After supporting the old bridge at, cut the old bridge into blocks and carry it out, then raise the new bridge to the erection position and construct it when the new bridge is carried in or temporarily supported by the old bridge. , The removal of the old bridge can be done safely on the temporary new bridge, so it can be done with small-capacity mobile devices,
The installation of the moving device does not require a large amount of work, the construction period can be significantly reduced, the cost is low, and traffic congestion is rarely caused. Thus, when the old bridge is removed and the new bridge is temporarily constructed, the other party can share their own weight with the other party, enabling the use of moving equipment such as small-capacity lifting equipment, thereby shortening the construction period and reducing costs. Bridge removal and erection methods are provided.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a method for removing and erection of a bridge according to the present invention.

FIG. 2 shows a second embodiment of the bridge removal and erection method according to the present invention.

FIG. 3 shows a third embodiment of the method for removing and erection of a bridge according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Abutment 2 ... Old bridge 3 ... Old truss 4 ... Shimbashi 4A ... Shimbashi block 4B ... Shimbashi block 4T ... End member 5 ... Truck 6 ... Chain (Support member) 7: Temporary material 8: Near abutment

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Makoto Fujiwara 6-2-10 Ginza, Chuo-ku, Tokyo Inside the Tomoe Corporation (72) Inventor Mizuho Fujita 6-2-10 Ginza, Chuo-ku, Tokyo 2D059 CC08 CC15 GG41 F-term in the company Tomoe Corporation (reference)

Claims (2)

[Claims] In a method for removing and erection of a bridge for removing an old bridge and erection of a new bridge, a new bridge component unloaded on the old bridge and in the vicinity of the old bridge is moved to the erection position by a crane or a truck for the whole or for each block. Moving and temporarily constructing, supporting the old bridge on the new bridge, cutting the old bridge into blocks and transporting it out, then lowering the new bridge to the erection position and constructing it . 2. In the removal and erection method of a bridge for removing an old bridge and erection of a new bridge, a new bridge component is moved to an erection position below the old bridge for each block and temporarily supported by the old bridge. A bridge removal and erection method characterized by supporting the old bridge, cutting the old bridge into blocks, transporting the new bridge, and then raising the new bridge to the erection position.