JP7465775B2 - Inter-building bridge construction method - Google Patents

Description

This invention relates to a construction method for erecting a bridge between ridges.

For example, in a thermal power plant, coal stored in a bunker is transported to a mill by a conveyer belt. The transported coal is pulverized into pulverized coal by the mill and burned in a boiler. Due to an increase in electricity demand or other reasons, a boiler building may be added to an existing plant. In such cases, a bridge (fuel transport gallery) may be erected between the boiler buildings to transport coal from the existing boiler building to the new boiler building.

For example, Patent Document 1 describes a method for erecting a bridge between buildings such as boiler buildings, which "is a method of erecting a bridge between the first and second buildings by placing a bridge in a first building and sending it out while supporting it at one end on the side of a second building adjacent to the first building, dividing the bridge into multiple blocks in the sending direction, lifting the block at the tip in the sending direction and connecting it to a front stretching machine that has been placed in advance in the first building, and moving the tip block together with the front stretching machine in the sending direction while lifting the remaining blocks in order from the tip side and connecting the blocks together, thereby assembling the bridge with the front stretching machine floating in a position between the first and second buildings" (see abstract).

JP 2014-047525 A

The construction method described in Patent Document 1 requires the preparation of a front-hand stretching machine, and because the bridge is supported by a cantilever, the amount of deflection of the bridge needs to be managed. Therefore, the construction method described in Patent Document 1 has the problem that the bridge erection work is large-scale and complicated. Also, depending on the weight of the bridge, it may be necessary to prepare a large crane separately, but due to space constraints in existing plants, it may be difficult to install a large crane. Therefore, a construction method that makes it easy to erect the bridge is required.

The present invention was made in consideration of the above-mentioned circumstances, and its purpose is to provide a bridge construction method that makes it easy to erect a bridge between buildings.

In order to achieve the above object, a representative embodiment of the present invention is an inter-building bridge construction method for erecting a bridge between a first building and a second building, the method including: a first step of suspending one end of the bridge with a first jack device installed on the first building, suspending the other end of the bridge with a second jack device installed on the second building, and hoisting the bridge to a predetermined height using the first jack device and the second jack device simultaneously; and a second step of fixing the bridge hoisted to the predetermined height between the first building and the second building , the bridge being composed of a plurality of blocks, The inter-building bridge erection method further includes a third step of connecting the blocks to assemble the bridge before the first step, wherein the blocks are placed on the ground and a building lower than the specified height is installed between the first building and the second building, and the inter-building bridge erection method further includes a fourth step of hoisting the blocks placed on the ground onto the roof of the building by a crane and temporarily placing them in a first position before the third step, and a fifth step of moving the blocks temporarily placed at the first position to a second position on the roof of the building to perform the third step .

According to the present invention, construction work for erecting a bridge between buildings can be easily carried out. Problems, configurations, and effects other than those described above will become clear from the explanation of the embodiment below.

Layout of the area around the boiler. FIG. 2 is a plan view of the roof of the electrical room shown in FIG. 1 . FIG. 2 is a view taken along the arrow A in FIG. A flowchart showing the work procedures for erecting the fuel transport gallery.

The following describes an embodiment of the present invention with reference to the drawings.

Figure 1 is a layout diagram of the area around a boiler in a thermal power plant. In Figure 1, boiler 1, bunker steel frame 21, and electrical room 3 are existing facilities. In this facility, as boiler 2 and bunker steel frame 22 are added, construction work is required to erect a fuel transport gallery 7 (bridge) between bunker steel frame 21 (first building) and bunker steel frame 22 (second building). The fuel transport gallery 7 is equipped with a transport device such as a belt conveyor inside, and coal, which is fuel, is transported by driving this transport device. The bunker steel frames 21 and 22 are also steel structures for supporting bunkers 23 and 24 for storing coal (see Figure 3).

As shown in FIG. 1, an electrical room 3, which is a low-rise building, is installed between the boiler 1 and bunker steel frame 21 and the boiler 2 and bunker steel frame 22, and a crane 5 is installed near the electrical room 3. A workshop 50, which is an open space on the ground, is secured near the crane 5, and the gallery blocks 7A, 7B, and 7C (blocks) that make up the fuel transport gallery 7 are placed in this workshop 50.

On the roof of the electrical room 3, rails 10 and 11 are installed, which are an example of a moving device for moving the gallery blocks 7A, 7B, and 7C. Note that the moving device may be something other than the rails 10 and 11.

Figure 2 is a plan view of the roof of the electrical room 3. As shown in Figure 2, a horizontal rail 10 and a vertical rail 11 that is perpendicular to the horizontal rail 10 at the end of the horizontal rail 10 are laid on the roof of the electrical room 3. Although not shown, the horizontal rail 10 and the vertical rail 11 are installed on a base (rail foundation) installed in the electrical room 3. The horizontal rail 10 and the vertical rail 11 have a rail width that allows the gallery blocks 7A, 7B, and 7C to move.

In FIG. 2, one end of the horizontal rail 10 is a temporary storage area 15 (first position) for temporarily storing the gallery blocks 7A, 7B, and 7C, and the vertical rail 11 is an assembly area 16 (second position) for assembling the gallery blocks 7A, 7B, and 7C.

Figure 3 is a view of the equipment shown in Figure 1 as seen from the direction A. As shown in Figure 3, a pair of bunker steel frames 21, 22 are installed on the left and right, and the electrical room 3 is installed between them. The fuel transport gallery 7 assembled on the roof of the electrical room 3 is then lifted up to a specified height from the roof of the electrical room 3 and fixed to the joints 25, 26 at the tops of the bunker steel frames 21, 22.

Next, the details of the construction method for the fuel transport gallery 7 will be explained with reference to Figure 4, and also with reference to Figures 1 to 3 as appropriate. Figure 4 is a flowchart showing the work procedure for the construction work of the fuel transport gallery 7. As shown in Figure 4, the construction work for the fuel transport gallery 7 is divided into work in the workshop 50, work on the roof of the electrical room 3, and work on the top of the bunker steel frames 21 and 22.

In the work area 50 (on the ground), a worker assembles the gallery blocks 7A, 7B, and 7C that make up the fuel transport gallery 7 (Work 1). Note that in this embodiment, the number of gallery blocks 7A, 7B, and 7C is three, but this number can be any number.

The worker installs a foundation (not shown) on the roof of the electrical room 3 for placing the horizontal rails 10 and vertical rails 11 (task 2).

The worker installs structural blocks 41, 42 to support the vertical rail 11 on the left and right side walls of the electrical room 3 (task 3). Note that if the roof of the electrical room 3 is sufficiently large so that the entire length of the vertical rail 11 can be installed on the roof of the electrical room 3, it is not necessary to install the structural blocks 41, 42.

The worker installs the horizontal rails 10 and vertical rails 11 on the foundation (task 4).

Using the existing crane 5, the worker lifts the gallery block 7A placed in the work area 50, moves it in the directions of the arrows W1 and W2 in FIG. 1, and temporarily places it in the temporary storage area 15 in the electrical room 3 (operation 5/fourth step). The worker then uses the horizontal rails 10 to move the gallery block 7A in the direction of the arrow W3 in FIG. 1, and then uses the vertical rails 11 to move it in the direction of the arrow W4. In this way, the gallery block 7A is placed in the assembly area 16 (operation 6/fifth step). This operation is similarly performed for gallery blocks 7B and 7C (operation 7).

In addition, in task 7, the worker moves gallery block 7C in the direction of arrow W5, and moves gallery block 7B between gallery blocks 7A and 7C. As a result, gallery block 7A, gallery block 7B, and gallery block 7C are lined up in a row on vertical rails 11, which is assembly area 16.

In this state, the worker connects gallery block A, gallery block B, and gallery block C, attaches the outer wall, and assembles the fuel transport gallery 7 (operation 8/third step).

As shown in Figure 3, the worker sets up temporary lifting beams 31, 32 on the top of the bunker steel frames 21, 22 to attach the jack devices 35, 36 (first jack device, second jack device) (Task 9).

The workers install jacking devices 35, 36 on the temporary lifting beams 31, 32, and install the joints 25, 26 for attaching the fuel transport gallery 7 to the top of the bunker steel frames 21, 22 (task 10).

The worker lowers the wire 37 of the jack device 35 and secures it to one end of the fuel transfer gallery 7, and lowers the wire 38 of the jack device 36 and secures it to the other end of the fuel transfer gallery 7. Then, while keeping the fuel transfer gallery 7 horizontal, the worker simultaneously drives the jack devices 35 and 36 to slowly lift the fuel transfer gallery 7 from the roof of the electrical room 3 to the top of the bunker steel frames 21 and 22 (operation 11/first step). Next, the worker secures both ends of the fuel transfer gallery 7 to the joints 25 and 26, respectively, completing the erection of the fuel transfer gallery 7 between the bunker steel frames 21 and 22 (operation 11/second step).

As described above, the construction method for erecting the fuel transport gallery 7 according to this embodiment provides the following effects:

(1) Because this method uses jack devices 35 and 36 to lift the fuel transport gallery 7, there is no need to prepare a separate large crane. Therefore, there is no need for large-scale construction work.

(2) Because this method uses jack devices 35, 36 to lift the fuel transport gallery 7, there is no need to cantilever the fuel transport gallery 7 as in the method described in Patent Document 1. This makes the installation work easier.

(3) Because this construction method involves assembling the gallery blocks 7A, 7B, and 7C block by block in the work area 50, the gallery blocks 7A, 7B, and 7C can be lifted using the existing crane 5, making the erection work easy.

(4) Because this construction method uses the space on the roof of the electrical room 3 to assemble the fuel transport gallery 7, there is no need to secure a large space on the ground to assemble the fuel transport gallery 7. Therefore, the construction method according to this embodiment is particularly convenient when adding a boiler building to an existing plant.

(5) Gallery blocks 7A, 7B, and 7C can be moved using rails 10 and 11 installed on the roof of electrical room 3, improving work efficiency.

The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the gist of the present invention. All technical matters included in the technical ideas described in the claims are the subject of the present invention. The above-described embodiment shows a preferred example, but a person skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed in this specification, and these are included in the technical scope described in the attached claims.

For example, if the electrical room 3 is not installed between the bunker steel frames 21, 22, or if there is sufficient space between the bunker steel frames 21, 22 to assemble the fuel transport gallery 7, a construction method may be used in which the gallery blocks 7A, 7B, and 7C are connected in that space to assemble the fuel transport gallery 7, the outer walls are attached, and then the fuel transport gallery 7 is hoisted by the jack devices 35 and 36.

1, 2 Boiler 3 Electric room (building)
5 Crane 7 Fuel transport gallery (bridge)
7A, 7B, 7C Gallery Blocks (Blocks)
10 Horizontal rail (moving device)
11 Vertical rail (movement device)
15 Temporary storage area (first location)
16 Assembly area (second location)
21, 22 Banka Steel Frame (1st Building, 2nd Building)
23, 24 Bunker 25, 26 Joint 31, 32 Temporary lifting beam 35, 36 Jack device (first jack device, second jack device)
37, 38 Wire 41, 42 Structural block 50 Work place

Claims (3)

A method for erecting a bridge between a first building and a second building, comprising the steps of:
a first step of suspending one end of the bridge by a first jack device installed on the first building, suspending the other end of the bridge by a second jack device installed on the second building, and suspending the bridge to a predetermined height by simultaneously using the first jack device and the second jack device;
a second step of fixing the bridge, which has been lifted to the predetermined height, between the first and second towers;
Including,
The bridge is composed of a plurality of blocks,
The inter-building bridge construction method further includes a third step of connecting the blocks to assemble the bridge before the first step,
Each of the blocks is placed on the ground,
a building lower than the predetermined height is installed between the first building and the second building;
The above-mentioned inter-building bridge construction method is as follows:
a fourth step of lifting each of the blocks placed on the ground to the roof of the building by a crane and temporarily placing the blocks in the first position before the third step;
a fifth step of moving each of the blocks temporarily placed at the first position to a second position on the roof of the building in order to carry out the third step;
The method for erecting a bridge between buildings further comprises : In the inter-building bridge construction method according to claim 1 ,
A moving device for moving each of the blocks is installed on the roof of the building,
An inter-building bridge erection method, characterized in that in the fifth step, each of the blocks is moved from the first position to the second position using the moving device. In the inter-building bridge construction method according to claim 2 ,
The first building and the second building are each a steel frame structure for installing a bunker for storing coal,
the bridge being a fuel transport gallery equipped with a transport device for transporting the coal;
the building is an electrical room,
The moving device is a rail.
This is a construction method for erecting bridges between buildings.

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