JP7373982B2 - How to build a bridge - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act On September 19th and 20th, 2019, a demonstration of the “floor slab renewal system” and a demonstration experiment observation session were held at Daiko Bussan Co., Ltd. Yokohama Kizai Center. did.

The present invention relates to a method for constructing a bridge by sequentially arranging deck slabs in one direction on main girders extending in the axial direction of the bridge.

Bridges generally consist of multiple piers, main girders (bridge girders) that span the multiple piers and extend in parallel in the bridge axis direction, and reinforced concrete floors that are lined up on the main girders to form the road surface. It consists of a version and a.

Such slabs may need to be replaced (removal of the existing slab and installation of a new slab) due to deterioration of the concrete due to long-term use or corrosion of internal reinforcing bars. For this reason, various floor slab replacement methods have been proposed (for example, see Patent Document 1).

JP2019-073948A

Regarding bridge reconstruction by replacing deck slabs as described above, since the target is a road that is in service, the most important issue is to minimize social loss due to traffic restrictions associated with construction. Become.

In view of the above-mentioned circumstances, it is an object of the present invention to improve the efficiency of bridge construction work, including the installation of deck slabs, in order to reduce social loss.
More specifically, the objective is to improve efficiency in operations such as transporting and/or installing newly installed floor slabs, and fixing floor slabs together.

A first aspect of the present invention is a method of constructing a bridge by sequentially arranging and installing precast concrete deck slabs on the main girder extending in the axial direction of the bridge, comprising:
installing a plurality of said floor slabs with gaps between said floor slabs;
Laying rails for moving the floor slab transport trolley on the plurality of installed floor slabs via sleepers , so that the rails are supported by the floor slabs via the sleepers ;
transporting the new floor slab by moving a movable floor slab carrier on the rail; and
pouring filler concrete into the gap between the plurality of installed floor slabs;
including;
The method is characterized in that the filling concrete is poured into the gap while the laid rail is above the gap.
A second aspect of the present invention is a method of constructing a bridge by sequentially arranging and installing precast concrete deck slabs on the main girder extending in the axial direction of the bridge,
installing a plurality of said floor slabs with gaps between said floor slabs;
Laying rails for moving the floor slab erection machine on the plurality of installed floor slabs via sleepers, so that the rails are supported by the floor slabs via the sleepers;
installing a new floor slab while a movable floor slab erection machine moves on the rail; and
pouring filler concrete into the gap between the plurality of installed floor slabs;
including;
The method is characterized in that the filling concrete is poured into the gap while the laid rail is above the gap.

A third aspect of the present invention is a method of constructing a bridge by sequentially arranging and installing precast concrete deck slabs on the main girder extending in the axial direction of the bridge,
installing a plurality of said floor slabs with gaps between said floor slabs;
By laying a first rail for moving the floor slab transport trolley and a second rail for moving the floor slab erection machine on the plurality of installed floor slabs via sleepers , the first rail and the supporting the second rail on the floor slab via the sleeper ;
transporting the new floor slab by moving a movable floor slab transport trolley on the first rail;
installing the new floor slab by a floor slab construction machine that is movable on the second rail ; and
pouring filler concrete into the gap between the plurality of installed floor slabs;
including;
The method is characterized in that the filling concrete is poured into the gap while the laid first rail and second rail are above the gap.
A fourth aspect of the present invention is a method of constructing a bridge by sequentially arranging and installing precast concrete deck slabs on the main girder extending in the axial direction of the bridge,
installing a plurality of said floor slabs with gaps between said floor slabs;
By laying a first rail for moving the floor slab transport trolley and a second rail for moving the floor slab erection machine on the plurality of installed floor slabs via sleepers, the first rail and the supporting the second rail on the floor slab via the sleeper;
transporting the new floor slab by moving a movable floor slab transport trolley on the first rail;
installing the new floor slab by a floor slab construction machine that is movable on the second rail; and
pouring filler concrete into the gap between the plurality of installed floor slabs;
including;
Placing the filler concrete into the gap with the first rail laid above the gap and the second rail removed from above the gap. Features.

According to the present invention, by using the floor slab transport cart and/or the floor slab erection machine as a track vehicle, although it is necessary to install the rails, a large local load is placed on the already installed floor slabs, etc. can be suppressed.
When fixing the floor slabs together, by creating a gap between the slabs and fixing them with filler concrete, it is possible to increase flexibility by changing the left and right gaps on curved roads, etc. .
On the other hand, even if there is a gap between the floor slabs, the rail movement method does not hinder the movement of the floor slab transport cart or the floor slab erecting machine.
In addition, since there are almost no restrictions on the timing of the work to close the space between the floor slabs, it can be done all at once, greatly contributing to improving work efficiency.

A side view of the entire system during floor slab erection work shown as an embodiment of the present invention Side view of the floor slab erection machine during floor slab erection work Front view of the floor slab erection machine and floor slab transport trolley Plan view of floor slab erection machine Side view of the floor slab transport trolley Plan view of floor slab transport trolley Side view and plan view of floor slab erection work (1) Side view and plan view of floor slab erection work (2) Side view and plan view of floor slab erection work (3) Side view and plan view of floor slab erection work (4) Side view and plan view of floor slab erection work (5) Side view and plan view of floor slab erection work (6) Side view and plan view of floor slab erection work (7) Explanatory diagram of concrete filling area Explanatory diagram when pouring filler concrete after completion of floor slab erection work Plan view showing how to erect slabs for curved roads A side view of the entire system during floor slab erection work shown as another embodiment A side view of the floor slab erection machine during floor slab erection work in the above other embodiments A front view of the floor slab erection machine and the floor slab transport vehicle in the other embodiments described above. Side view of the floor slab transport vehicle in the other embodiments described above An explanatory diagram of the filling concrete placement part in the above other embodiments

Embodiments of the present invention will be described in detail below.
FIG. 1 is a side view of the entire system during floor slab erection work shown as one embodiment of the present invention, in which a floor slab erection machine 10 and a floor slab transport cart 30 are illustrated.

2 is a side view of the floor slab erection machine 10 during floor slab erection work, FIG. 3 is a front view of the floor slab erection machine 10 and the floor slab transport cart 30, and FIG. 4 is a plan view of the floor slab erection machine 10. 5 is a side view of the floor slab transport vehicle 30, and FIG. 6 is a plan view of the floor slab transport vehicle 30.

As shown in FIGS. 1, 2, and 3, a main girder (bridge girder) 1 of a bridge is made of H-beam steel or the like and extends in the axial direction of the bridge. The main girder 1 also has a four-row configuration in this embodiment, as can be seen from FIG.

The floor slabs 2 (2A, 2B, 2C, . . . , 2H, . . . , 2L, 2M) are installed one by one on top of the main girder 1 by the floor slab erection machine 10 to extend the main girder 1. They are arranged and installed in the same direction, thereby forming the road surface. Note that the floor slabs 2 are written as 2A, 2B, 2C, . . . in the order of installation.

In FIG. 1 (and FIG. 2), the floor slab erection work progresses in the direction of the arrow from left to right. Accordingly, on the left side of FIG. The slab 2N) will be installed at a position adjacent to the latest installed new floor slab 2M. Therefore, the left side of FIG. 1 is the upstream side when seen in the direction of progress of the floor slab erection work (the direction in which the floor slabs are arranged in order), and the right side of FIG. 1 is the downstream side when seen in the progress direction of the floor slab erection work.

Further, the direction of progress of the floor slab erection work is the basic direction of movement of the floor slab erection machine 10. Therefore, when the slab erection machine 10 moves to the right in FIG. 1, it is called forward movement, and when it moves to the left side, it is called backward movement. Further, the right side in FIG. 1 of the floor slab erection machine 10 is the front, and the left side in FIG. 1 is the rear.

In this embodiment, the deck slabs 2 (2A, 2B, 2C, . . . ) are made of reinforced precast concrete, and their short sides are aligned in the direction of the bridge axis, and their long sides are aligned in the direction perpendicular to the bridge axis. and install it. The length of the short side of the floor slab 2 is, for example, 2.5 m, and the length of the long side is, for example, 10 m.

Adjacent deck slabs 2 in the bridge axis direction (for example, 2L and 2M in FIG. 2) are installed with a gap of about 30 to 40 cm (s in FIG. 2). A reinforcing bar (anchoring joint; j in FIG. 2) protrudes from the long side of each floor slab 2 toward this gap. Note that after the floor slab 2 is installed, filler concrete (mortar) is placed in this gap. The filling work will be described later.

The floor slab erecting machine 10 moves on the rails 4 that are laid on the newly installed floor slabs 2A to 2M that have already been installed, particularly on the new floor slabs 2A to 2M in this embodiment, via sleepers 3 made of H-shaped steel or the like. Then, a new floor slab 2N is installed in front of the latest installed new floor slab 2M.

For this reason, the floor slab erection machine 10 includes a moving body 11 that can move on the floor slab 2, and a floor slab lifting mechanism 15 that is supported by this moving body 11 and has a suspension point in front of the moving body 11. including.

The moving body 11 is separated into a first cart 12 on the front side in the moving direction and a second cart 13 on the rear side in the moving direction, and these carts 12 and 13 are connected by upper and lower connecting members 14 and move integrally. .

The floor slab lifting mechanism 15 includes a girder 17 that is supported by a column 16 erected on the first truck 12 of the moving body 11 and extends forward in the moving direction of the first truck 12, and a girder 17 provided on the tip side of the girder 17. and a hanging device 18.
The hanging device 18 includes at least a sheave or a wire feeding section, and a power section such as a winch does not need to be integrated with the hanging device 18. The hanging device 18 lifts up and receives the floor slab 2 from the floor slab transport cart 30, and can install the floor slab 2 at a predetermined position by suspending the floor slab 2 from above the floor slab installation position.

Here, the hanging device 18 is supported by the girder 17, and since the girder 17 protrudes forward in the moving direction of the moving body 11 (first truck 12), the floor slab can be transported without moving the hanging device 18 itself back and forth. It becomes possible to lift the floor slab 2 from the trolley 30 and lower it to the floor slab installation position.

Further, in addition to the hanging device 18 for the floor slab 2, an auxiliary hanging device 19 is provided on the front side of the girder 17. This auxiliary lifting device 19 can be used to lift and lower the sleepers 3 and rails 4 when installing the floor slab 2 and the rails 4 simultaneously.

The first truck 12 is equipped with a floor slab lifting mechanism 15, whereas the second truck 13 is equipped with a counterweight 20.

The counterweight 20 is for canceling the moment due to the load applied to the hanging point of the hanging device 18 that is remote from the support part (pillar 16) of the floor slab lifting mechanism 15 on the first truck 12.

Therefore, the load of the floor slab 2 to be lifted is FW, the distance from the support 16 to the hanging point (the length of the girder 17) is L1, and the distance from the support 16 to the counterweight 20 (the length of the connecting member 14) is L2. Then, the weight CW of the counterweight 20 is set as follows.
CW×L2≧FW×L1
CW≧FW×(L1/L2)
Therefore, by setting L2>>L1, it is possible to reduce the weight of the counterweight 20 (weight CW).

In this embodiment, the first cart 12 and the second cart 13 are connected by the connecting member 14, so by adjusting the length of the connecting member 14, the distance from the support 16 to the counterweight 20 is set to be longer. be able to. Therefore, it is easy to reduce the weight of the counterweight 20. Reducing the weight of the counterweight 20 leads to a reduction in the load on the floor slab.

The movable body 11 is also mounted on the floor slab 2 (a pair of left and right rails 4 laid on the floor slab 2 via sleepers 3) with left and right ground contact parts, in this embodiment, left and right wheels (track rings) 21. A space 25 is provided between the left and right ground contact portions, that is, between the left and right wheels 21, through which the floor slab carrier 30 can pass (see FIG. 3).

In this embodiment, wheels 21 are provided as the left and right ground contact portions of the moving body 11 to form a passing space 25 below the moving body 11. Thereby, the vehicle can run on the ground contact portion, and the ground contact portion can also serve as a running portion. Furthermore, by using a bearing ring in particular, the position of the passage space 25 can be stabilized.

Specifically, as shown in FIG. 3, the first truck (first wheel holding portion) 12 of the moving body 11 is provided with a pair of left and right columns along with columns 16 erected on the first truck 12. , 16 are rigidly connected by a horizontal connecting member 22 at a relatively high position.
Further, as shown in the plan view of FIG. 4, the girder 17 projects forward from the left and right pillars 16, 16, and is connected at the tip side by a horizontal connecting portion 17a. Therefore, the girder 17 has a U-shaped frame shape in plan view.

The same applies to the second truck (second wheel holding portion) 13, and a pair of left and right counterweights 20 are provided on the second truck 13. Supports 23, 23 are provided on the left and right second carts 13, 13, respectively, and the left and right supports 23, 23 are rigidly connected by a horizontal connecting member 24 at a relatively high position.
The same applies to the upper and lower connecting members 14, and a pair of left and right connecting members 14 are provided to connect the columns 16, 16 on the left and right first carts 12, 12 and the columns 23, 23 on the left and right second carts 13, 13. .

Therefore, the floor slab transport cart 30 can pass between the left and right first carts 12 and 12 and between the left and right second carts 13 and 13 below the horizontal connecting members 22 and 24 and the horizontal connecting portion 17a. A space 25 is formed.

Next, the floor slab transport cart 30 will be explained with reference to FIGS. 1, 3, 5, and 6.
The floor slab transport trolley 30 is for transporting (carrying in) the floor slab 2N installed by the floor slab erection machine 10, and is used to transport sleepers 3 onto the newly installed floor slabs 2A to 2M that have already been installed, especially on the new floor slabs 2A to 2M. The robot moves on a pair of left and right rails 5 laid through the vehicle.
The left and right pair of rails 5 for the floor slab transport cart 30 are laid between the left and right pair of rails 4 for the floor slab erection machine 10, using the same sleepers 3 as the left and right pair of rails 4 for the floor slab erection machine 10. be done.

The floor slab transport trolley 30 includes a car body 31 that is long in the bridge axis direction (the direction in which the rails 5 extend), and wheels (track rings) 32 that are attached to the lower part of the car body 31 and roll on a pair of left and right rails 5. It is equipped with The floor slab transport truck 30 further includes a turntable 33 on a vehicle body 31 on which the floor slab 2 can be loaded and whose direction can be changed.

The turntable 33 includes a circular rotating section 33a that is supported by the vehicle body 31 and rotatable in a horizontal plane, and a rectangular floor slab mounting section 33b that is fixedly supported on the rotating section 33a.

Therefore, by aligning the longitudinal direction of the floor slab mounting portion 33b with the moving direction of the floor slab transport vehicle 30 using the rotating portion 33a of the turntable 33, the floor slab transportation vehicle 30 can move the floor slab 2 loaded onto the floor. It is possible to pass through the space 25 of the plate construction machine 10.
The floor slab transport cart 30 also changes the direction of the floor slab 2 loaded on the floor slab mounting section 33b by changing the orientation of the floor slab mounting section 33b using the rotating section 33a of the turntable 33, The longitudinal direction of the floor slab 2 can be set perpendicular to the bridge axis to match the direction at the time of installation.

Next, the floor slab erection work using the above-mentioned floor slab erection machine 10 and the floor slab transport cart 30 will be explained with reference to the process diagrams of FIGS. 7 to 13. Note that in FIGS. 7 to 13, (A) in each figure is a side view, and (B) is a plan view.

FIG. 7 shows a state in which the installation of the floor slab 2M has been completed, and the floor slab erection machine 10 is still at the floor slab installation position when the floor slab 2M was installed (added). The floor slab transport cart 30 has just arrived close to the floor slab erection machine 10, loaded with the next floor slab to be installed (the next floor slab to be installed adjacent to the front of the floor slab 2M) 2N. In addition, in the floor slab transport trolley 30, the floor slabs 2N for installation are loaded with the longitudinal direction of the floor slabs facing the bridge axis direction.

Next, as shown in FIG. 8, the floor slab erection machine 10 moves backward from the floor slab installation position, and the floor slab transport cart 30, with the floor slab 2N still loaded, moves through the passage space of the floor slab erection machine 10 ( It passes through 25) in FIG. 3 and enters the floor slab erection machine 10 from the rear to the front.

Next, as shown in FIG. 9, the turntable 33 (floor slab mounting portion 33b) is rotated 90 degrees in the floor slab transport cart 30, and the direction of the loaded floor slab 2N is changed so that the longitudinal direction of the floor slab is the bridge. Change it so that it is perpendicular to the axis. Therefore, the position where the floor slab erecting machine 10 moves backward in FIG. .

Next, as shown in FIG. 10, after the floor slab erecting machine 10 moves forward to the floor slab receiving position, the floor slab erecting machine 10 unloads the floor slab 2N from the floor slab transport cart 30 using the floor slab lifting mechanism 15. do.
After unloading, the floor slab transport trolley 30 rotates the turntable 33 (floor slab mounting portion 33b) by 90 degrees to the original position in preparation for leaving.

Next, as shown in FIG. 11, the floor slab transport cart 30 in an empty state exits from the front to the rear of the floor slab erection machine 10 through the passage space of the floor slab erection machine 10, and at the same time exits the floor slab erection machine 10 from the front to the rear. The machine 10 advances and moves from the floor slab receiving position to the floor slab installation position. The moving distance of the floor slab erection machine 10 from the floor slab receiving position to the floor slab installation position is small.

Next, as shown in FIG. 12, the floor slab erection machine 10 uses the floor slab lifting mechanism 15 to unload the newly installed floor slab 2N and place it adjacent to the front of the already installed floor slab 2M. Install.
At this time, the floor slab transport cart 30 is being moved to a new floor slab storage area (not shown) in an empty state.

Next, as shown in FIG. 13, a sleeper 3 is installed on the front edge of the floor slab 2N installed this time, and is supported by the sleeper 3 on the floor slab 2M and the sleeper 3 on the floor slab 2N. Set up. For these installations, an auxiliary hanging device 19, which is different from the hanging device 18 of the floor slab lifting mechanism 15, can be used.
The sleepers 3 and rails 4 to be installed here can be transported by being placed on the floor slab 2N together with the floor slab 2N using the floor slab transportation cart 30, and then installed at a predetermined position on the floor slab 2N after the floor slab 2N is installed. .

The same applies to the rails 5 for the floor slab transport cart 30.
That is, the rails 5 are installed by sharing the sleepers 3 and supporting them by the sleepers 3 on the floor slab 2M and the sleepers 3 on the floor slab 2N. A pair of rails 5, 5 for the floor slab transport cart 30 is arranged between a pair of rails 4, 4 for the floor slab erection machine 10. Also for installing the rail 5, an auxiliary hanging device 19, which is different from the hanging device 18 of the floor slab lifting mechanism 15, can be used.
Furthermore, the rails 4 for the floor slab erection machine 10 and the rails 5 for the floor slab transport vehicle 30 may be connected to each other and handled as an integrated object. In other words, they are transported and installed at the same time.

FIG. 13 shows a state in which the floor slab 2N has been installed, and the floor slab erection machine 10 is still at the floor slab installation position when the floor slab 2N was installed (added). The floor slab transport cart 30 has just arrived near the floor slab erecting machine 10, loaded with the floor slab 2O to be installed next (the floor slab to be next installed adjacent to the front of the floor slab 2N). Comparing FIG. 7 and FIG. 13, it can be seen that the floor slab erection work has progressed by one slab.

The floor slab erection system of the present embodiment includes a floor slab erection machine 10 that moves over the floor slab to install additional floor slabs, a floor slab transportation cart 30 that transports the floor slab that the floor slab erection machine 10 is adding. including;
The floor slab erection machine 10 includes a movable body 11 that is movable on the floor slab, and a floor slab lifting mechanism 15 that is supported by the movable body 11 and has a suspension point in front of the moving direction of the movable body 11,
The floor slab transport cart 30 can enter from the rear to the front of the movable body 11 when viewed in the moving direction of the movable body 11 with the floor slab loaded thereon.

With the above system, during floor slab erection work, the floor slab transport cart 30 enters the front of the floor slab erecting machine 10, which is the floor slab installation side of the floor slab erecting machine 10, to newly install the floor slab. can be delivered to the floor slab erection machine 10. Therefore, the moving distance of the floor slab erection machine 10 from receiving the floor slab to installing the floor slab can be reduced. This makes it possible to stably install the floor slab from a suspended state with just a few movements.

Further, according to the present embodiment, the direction of the floor slab can be changed in front of the floor slab erection machine 10 by using the floor slab transport cart 30 equipped with the turntable 33. There is no need to change the direction of the floor slab. This also contributes to stable installation of the floor slab.

As is clear from the above description, this embodiment is characterized by the following A (A-1 to 3) and/or B (B-1 to 3).

(A-1) Installing a plurality of floor slabs with gaps s between them (A-2) Installing rails 5 for moving the floor slab transport cart 30 above the plurality of installed floor slabs. Laying (A-3) Transporting a new floor slab by moving the movable floor slab transport cart 30 on the rails 5.

(B-1) Installing a plurality of floor slabs with gaps s between them. (B-2) Installing rails 4 for moving the floor slab erection machine 10 above the plurality of installed floor slabs. Laying (B-3) Installing a new floor slab while the movable floor slab erection machine 10 moves on the rails 4.

Alternatively, the present embodiment can be described as being characterized by the following C (C-1 to C-3) and/or D (D-1 to 2).

(C-1) Transporting the newly installed floor slab using the floor slab transport cart 30 that is movable on the rails 5 laid above the installed floor slab (C-2) The transported floor slab (C-3) Above the installed floor slab, in line with the already laid rail 5, install a rail for moving the floor slab transport cart 30. Installing 5

(D-1) Using a floor slab erection machine 10 that is movable on the rails 4 laid above the installed floor slabs, install the floor slabs with a gap s between them and the installed floor slabs. (D-2) Laying the rail 5 for moving the floor slab erection machine 10 above the installed floor slab in line with the already laid rail 4.

In the present embodiment, the gap s between the installed floor slabs 2 (see FIG. (see). Place filler concrete.

FIG. 14 is an explanatory diagram of a part where concrete is placed between the floor slabs, with FIG. 14(A) being a plan view and FIG. 14(B) being an enlarged side view.

As shown in FIG. 14(A), reinforcing bars (fixing joints) j protrude from the long sides of the installed floor slab 2 toward the gap s. Therefore, by placing filler concrete here, the adjacent deck slabs 2, 2 in the bridge axis direction can be reliably fixed. In addition, as shown in FIG. 14(B), a buried formwork 41 is arranged at the bottom of the filler concrete casting space, and filler concrete 42 is placed on top of the buried formwork 41.

The timing of placing the filler concrete 42 can be determined as follows.
The work efficiency can be improved by placing the filler concrete 42 in batches as much as possible.

The filling concrete 42 can be placed after passing through the slab erection machine 10. At this time, the rails 4 for the floor slab erection machine 10 and the rails 5 for the floor slab transport cart 30 are present on the installed floor slab 2.
The rail 4 for the floor slab erection machine 10 can be removed once the floor slab erection machine 10 has passed. On the other hand, the rails 5 for the floor slab transport vehicle 30 can be removed after the floor slab erection work is completed, since it is necessary to operate the floor slab transport vehicle 30 until the floor slab erection work is completed. However, if the rail 4 for the floor slab erection machine 10 and the rail 5 for the floor slab transport vehicle 30 are integrated, both can be removed after the floor slab erection work is completed.

Therefore, when pouring filler concrete before completing the floor slab erection work, pour the filler concrete toward the filler concrete placement space below the rail 5 with at least the rail 5. Set up
If filling concrete is to be placed after the floor slab erection work is completed, the rails 5 can be removed, so the work can be done all at once without any restrictions.

FIG. 15 is an explanatory diagram of the case where filler concrete is placed after completion of the floor slab erection work, and FIG. 15(A) shows the state at the time of completion of the floor slab erection work. In FIG. 15(B), after completion of the slab erection work, filler concrete 42 is placed between the adjacent slabs 2 in the bridge axis direction. In FIG. 15(C), asphalt coating 43 is applied to the floor slab 2 after the filling concrete 42 has been placed.

FIG. 16 is a plan view showing a method of constructing a floor slab in the case of a curved road, in which rectangular precast floor slabs 2 are arranged along the curved shape, and the gap shape between the floor slabs 2 and 2 (filling concrete 42 This is achieved by making the shape (shape) trapezoidal in plan view. In this way, by providing a gap between the floor slabs 2 and fixing them with filler concrete, it is possible to change the left and right gaps to accommodate curved roads and the like.

Next, other embodiments of the present invention will be described with reference to FIGS. 17 to 21.
In the embodiment described above, the rails 4 and 5 of the floor slab erecting machine 10 and the floor slab transport cart 30 are supported by the floor slab 2 (via the sleepers 3), and the floor slab erecting machine 10 and the floor The load of the plate transport cart 30 is applied to the installed floor plate 2.

On the other hand, in the embodiments shown in FIGS. 17 to 21, the load of the floor slab erection machine 10 and the floor slab transport cart 30 is not applied to the installed floor slab 2 before the floor slabs 2 are fixed to each other. be.

Figure 17 is a side view of the entire system during floor slab erection work shown as another embodiment, Figure 18 is a side view of a floor slab erection machine during floor slab erection work, and Figure 19 is a floor slab erection machine and floor slab transportation. FIG. 20 is a front view of the cart, and FIG. 20 is a side view of the deck transport cart.

As can be seen from these figures, the bundle member 3a is placed between the floor slabs 2 and 2 on the upper surface of the main girder 1, and the rails 4 and 5 are supported by the bundle member 3a (via the sleepers 3) and laid. ing. In other words, the rails 4 and 5 are supported by the main girder 1 and laid without using the floor slab 2. Thereby, the rails 4 and 5 can be reliably supported without applying any load to the floor slab 2.

In this case, the sleeper 3 and the bundle member 3a are integrated to form the sleeper 3 with legs (bundle member) 3a, thereby increasing the efficiency of the rail installation work.
In actual handling, one sleeper 3 and the four bundle members 3a on the lower surface side thereof in this example are integrated in advance, and the sleeper 3 with bundle members (legs) 3a is integrated in advance. Treated as such. Thereby, the sleepers 3 can be attached and removed on site by simply attaching and detaching the bundle members (legs) 3a to the main girder 1, making it possible to improve the efficiency of the rail installation work.

In the case of the embodiments shown in FIGS. 17 to 20, filling concrete cannot be placed until after the bundle member 3a is removed, that is, after the rails 4 and 5 are removed.
Therefore, in this embodiment, the filling concrete is placed after the rails 4, 5 and sleepers 3 (bundle member 3a) are removed.

FIG. 21 is an explanatory view of the part where concrete is placed between the floor slabs in the embodiment of FIGS. 17 to 20, with FIG. 12(A) being a plan view and FIG. 21(B) being an enlarged side view.

Due to the fact that the bundle member 3a is installed on the main girder 1 between the floor slabs 2, 2, the reinforcing bars (joints for anchorage) j are not protruded from each long side of the floor slabs 2, 2 in that part. (See FIG. 21(A)).
Therefore, a female joint 44 is embedded in the floor slab 2 in this part, so that the fixing member 45 can be connected to the female joint 44 after the bundle member 3a is removed (see FIG. 21(B)). ).

In addition, in the above explanation, only the erection work of the new floor slab was explained, but on the premise that the floor slab will be replaced, the new floor slab may be installed after the existing floor slab is removed. Needless to say. Moreover, by preparing two sets of floor slab erection machines and floor slab transport carts and arranging them before and after the floor slab replacement location, the floor slab replacement work can be carried out in parallel.

Furthermore, the illustrated embodiments are merely illustrative of the present invention, and the present invention encompasses various improvements and improvements made by those skilled in the art within the scope of the claims, in addition to what is directly shown by the described embodiments. Needless to say, this includes changes.
The claims originally filed were as follows.
[Claim 1]
A method of constructing a bridge by sequentially arranging and installing deck slabs on the main girder extending in the direction of the bridge axis,
Installing multiple floor slabs with gaps between them,
Laying a rail for moving the floor slab transport trolley above the plurality of installed floor slabs;
transporting a new floor slab by moving a movable floor slab carrier on the rail; and
pouring filler concrete into the gaps between the plurality of installed floor slabs;
methods of building bridges, including;
[Claim 2]
A method of constructing a bridge by sequentially arranging and installing deck slabs on the main girder extending in the direction of the bridge axis,
Installing multiple floor slabs with gaps between them,
Laying a rail for moving the floor slab erection machine above the plurality of installed floor slabs;
installing a new floor slab while a movable floor slab erection machine moves on the rail; and
pouring filler concrete into the gaps between the plurality of installed floor slabs;
methods of building bridges, including;
[Claim 3]
3. The bridge construction method according to claim 1, wherein the filling concrete is placed before the rails are removed.
[Claim 4]
4. The bridge according to claim 3, wherein the rail is supported by the deck slab and the filling concrete is placed in a gap between the deck slabs below the rail. How to build.
[Claim 5]
3. The bridge construction method according to claim 1, wherein the filling concrete is placed after the rails are removed.
[Claim 6]
The rail is supported by a bundle member placed between the deck slabs of the main girder, and the filling concrete is placed after the rail and the bundle member are removed. The method of constructing a bridge according to claim 5.

1 Main girder 2 (2A, 2B, 2C, ..., 2M, 2N) Floor slab 3 Sleeper 3a Bundle member (sleeper leg)
4 Rails 5 Rails 10 Floor slab erection machine 11 Moving body 12 First trolley 13 Second trolley 14 Connecting member 15 Floor slab lifting mechanism 16 Pillar 17 Girder 17a Horizontal connecting portion 18 Hanging device 19 Auxiliary hanging device 20 Counterweight 21 Wheel 22 Horizontal connecting member 23 Support column 24 Horizontal connecting member 25 Pass-through space 30 Slab transport trolley 31 Car body 32 Wheels 33 Turntable 33a Swivel section 33b Slab mounting section 41 Buried formwork 42 Filling concrete 43 Asphalt coating 44 Female joint 45 Fixing member

Claims (8)

A method of constructing a bridge by sequentially installing precast concrete deck slabs on the main girder extending in the bridge axis direction, the method comprising:
installing a plurality of said floor slabs with gaps between said floor slabs;
Laying rails for moving the floor slab transport trolley on the plurality of installed floor slabs via sleepers , so that the rails are supported by the floor slabs via the sleepers ;
transporting the new floor slab by moving a movable floor slab carrier on the rail; and
pouring filler concrete into the gap between the plurality of installed floor slabs;
including;
A method for constructing a bridge, wherein the filling concrete is placed in the gap while the laid rail is above the gap. A method of constructing a bridge by sequentially installing precast concrete deck slabs on the main girder extending in the bridge axis direction, the method comprising:
installing a plurality of said floor slabs with gaps between said floor slabs;
Laying rails for moving the floor slab erection machine on the plurality of installed floor slabs via sleepers , so that the rails are supported by the floor slabs via the sleepers ;
installing a new floor slab while a movable floor slab erection machine moves on the rail; and
pouring filler concrete into the gap between the plurality of installed floor slabs;
including;
A method for constructing a bridge, wherein the filling concrete is placed in the gap while the laid rail is above the gap. A method of constructing a bridge by sequentially installing precast concrete deck slabs on the main girder extending in the bridge axis direction, the method comprising:
installing a plurality of said floor slabs with gaps between said floor slabs;
By laying a first rail for moving the floor slab transport trolley and a second rail for moving the floor slab erection machine on the plurality of installed floor slabs via sleepers , the first rail and the supporting the second rail on the floor slab via the sleeper ;
transporting the new floor slab by moving a movable floor slab transport trolley on the first rail ;
installing the new floor slab by a floor slab construction machine that is movable on the second rail; and
pouring filler concrete into the gap between the plurality of installed floor slabs;
including;
A method for constructing a bridge, wherein the filling concrete is placed in the gap while the first rail and the second rail that have been laid are above the gap. A method of constructing a bridge by sequentially installing precast concrete deck slabs on the main girder extending in the bridge axis direction, the method comprising:
installing a plurality of said floor slabs with gaps between said floor slabs;
By laying a first rail for moving the floor slab transport trolley and a second rail for moving the floor slab erection machine on the plurality of installed floor slabs via sleepers , the first rail and the supporting the second rail on the floor slab via the sleeper ;
transporting the new floor slab by moving a movable floor slab transport trolley on the first rail ;
installing the new floor slab by a floor slab construction machine that is movable on the second rail; and
pouring filler concrete into the gap between the plurality of installed floor slabs;
including;
A bridge in which the filling concrete is poured into the gap while the laid first rail is above the gap and the second rail is removed from above the gap. How to build. The bridge construction method according to claim 3 or 4, wherein the pair of first rails are arranged between the pair of second rails. The new floor slab is installed next to the most recently installed floor slab,
installing new sleepers on the new floor slab by the floor slab erection machine;
causing the new sleeper to support the new first rail;
The method for constructing a bridge according to any one of claims 3 to 5. The new floor slab is installed next to the most recently installed floor slab,
installing new sleepers on the new floor slab by the floor slab erection machine;
causing the new sleeper to support the new second rail;
The method for constructing a bridge according to any one of claims 3 to 5. The said floor slab is a newly installed floor slab,
The method for constructing a bridge according to any one of claims 1 to 7, wherein the new deck slab is installed after removing the existing deck slab in the bridge.