JP2019044453A - Replacement method and erection machine - Google Patents

Abstract

To provide a replacement method capable of replacing a main girder even if the replacement section of a railway bridge is high from the ground and there are curves or tunnels nearby.SOLUTION: First to third erection machines are used. A replacement method includes: a lifting step for lifting an old girder 2 by a second erection machine 1B and a third erection machine 1C arranged with a replacement section X in between; an old girder carrying out step for moving a rigid formation in which the third erection machine 1C, the old girder 2, the second erection machine 1B and a new girder 3 are rigidly connected in that order in a direction in which the third erection machine 1C is present, and then carrying out the old girder 2 from the replacement section X; a delivering step for further moving a rigid formation in which the second erection machine 1B, the new girder 3, and a first erection machine 1A are rigidly connected in that order in a direction in which the second erection machine 1B is present, and then delivering the new girder 3 to the replacement section; and a lowering step for lowering the new girder 3 with the first erection machine 1A and the second erection machine 1B to bridge the replacement section X.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a replacement method for replacing a main girder of a railway bridge, and a construction machine used to replace the main girder.

  The main girder (bridge girder) of the railway bridge will need to be replaced as it gets older. However, if it is difficult to install a mechanical device such as a crane when the main girder to be replaced is at a high position from the ground or if the river below the main girder is a river, use the crane etc. It can not be replaced.

  DESCRIPTION OF RELATED ART Conventionally, the apparatus for bridge girder construction which can move on a rail is known (refer patent document 1). In this bridge girder construction device, the bridge girder (main girder) is suspended by the installation girder and the bridge girder is erected or removed. The installation girder is slightly longer than twice the length of the installation section or the removal section, and has a lift device or the like that feeds out in the horizontal direction with the bridge girder suspended. However, such a bridge girder construction device can not be carried into the construction section if the track from the base where the bridge girder construction device is placed to the construction section has a sharp curve because the construction girder is long. In addition, if there is a narrow tunnel near the installation section, the lift device or the like interferes with the tunnel, and the bridge girder construction device can not be carried into the installation section.

JP, 2006-214209, A

  The present invention is intended to solve the above problems, and it is an object of the present invention to provide a replacement method that can replace the main girder even if the replacement section of the railway bridge is high from the ground and there are curves and tunnels nearby. I assume.

  The replacement method of the present invention is a method of replacing the main girder in the replacement section of the railway bridge from the old girder to the new girder, and the first to third construction machines are used. The lifting process of lifting the old girder with the second construction machine and the third construction machine arranged, the third construction machine, the old girder, the second construction machine, and the new girder in this order The old girder carrying-out process of moving the rigidly-knitted structure rigidly connected to the third construction machine in the direction where the third construction machine is located and carrying out the old girder from the replacement section, the second construction machine, the new girder, Moving the rigidly-knitted structure rigidly connected such that the construction machine in this order is in the direction in which the second construction machine is located, and sending out the new girder to the replacement section, the first construction machine and the first construction machine And a hanging step of hanging the new girder with a construction machine 2 and bridging the replacement section, and the construction machine mainly comprises a construction girder as a beam member and the construction girder. In To fine communication for rigidly connected, wherein the lifting suspension device for reducing lifting and suspending the main beam, to have a carriage for moving on the rail.

  In this replacement construction method, the new girder carrying-in, in which the first construction machine, the new girder, and the second construction machine are carried into the section adjacent to the replacement section in this order before the lifting step. It is preferable to have a process.

  In this replacement method, it is preferable to have a step of rigidly connecting the second construction machine and the new girder after the new girder loading step and before the lifting step.

  In this replacement construction method, it is preferable to have a step of releasing a third construction machine and a step of releasing the old girder after the old girder unloading step and before the suspension step.

  In this replacement method, when moving the main girder, it is preferable that a truck for moving on the rail is temporarily installed under the main girder.

  The erection machine of the present invention is used to rebuild the main girder in the replacement section of the railway bridge, and the erection girder as a beam member and a train for rigidly connecting the erection girder to the main girder. It is characterized by having a lifting lifting device for lifting and lifting the main girder and a carriage for moving on the rails.

  According to the replacement method of the present invention, since the movement on the rails is used, the main girder can be replaced with the new girder from the old girder even if the replacement section of the railway bridge is high from the ground. Further, since the construction machine having the erection girder is rigidly connected to the old girder or the new girder, the construction girder functions as if the length of the old girder or the new girder is increased. For this reason, a construction machine can shorten a construction girder, and can pass a curve, even if a curve exists near a change section. In addition, the construction machine can be made smaller because the function of sending out the main girder horizontally to the construction girder is unnecessary. Therefore, the construction machine can pass through the tunnel even if there is a tunnel near the replacement section. Therefore, by using this construction machine, the main girder can be replaced even if there is a curve or tunnel near the replacement section.

The side view of the construction machine concerning one embodiment of the present invention. (A)-(c) is a side view which shows the new girder carrying-in process in the replacement construction method which concerns on one Embodiment of this invention in time-sequential order. The side view which shows the continuation of the new girder carrying-in process in the same construction method. (A) And (b) is a side view which shows the lifting process in the construction method in order of time series. (A)-(c) is a side view which shows the old girder carrying-out process in the same construction method in time-sequential order. (A)-(c) is a side view which shows the continuation of FIG. 5 in the old carrying out process in time-sequential order. The side view which shows the sending out process in the same construction method. The side view which shows the suspension process in the same construction method. The side view which shows transfer of the construction machine in the same construction method.

  A construction machine according to an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the construction machine 1 has a construction girder 11, a connection structure 12, a lifting and lowering device 13, and a carriage 14. The installation girder 11 is a beam member. The connecting structure 12 is a member for rigidly connecting the erecting girder 11 with the old girder as a main girder and a new girder. The lifting and lowering device 13 is a device for lifting and lifting the main girder. The carriage 14 is a device for the construction machine 1 to move on the rails.

  The construction machine 1 configured as described above will be further described in detail. The installation girder 11 is a long beam member, and the rail direction is the long direction. The connection structure 12 rigidly connects the construction girder 11 and the main girder to each other so that the longitudinal directions coincide with each other. In the present embodiment, the installation girder 11 is a general installation girder used also for the maintenance of a track, and is fastened to the connection structure 12 with a plurality of bolts. The erecting girder 11 and the connecting structure 12 may be integrally configured. The lifting and lowering device 13 lifts and lowers the main girder supported by the wire with respect to the construction girder 11 by rolling up and lowering the wire. The lifting and lowering device 13 does not have a function to feed the main girder horizontally to the construction girder 11. The construction machine 1 shown in FIG. 1 has the connecting structure 12 and the lifting and lowering device 13 at both ends of the building beam 11, but the connecting structure 12 and the lifting and lowering device 13 are provided only at one end of the structure beam 11. You may The truck 14 has wheels, an axle, a truck frame, and the like. In addition, the construction machine 1 has a coupler, and can be coupled to the main girder by the coupler. Coupling by coupling is pin coupling. The construction machine 1 can be connected to the main girder by a connector to pass through the curve. In order to make the curved passage easier, the carriage 14 may be configured to be displaceable in the direction of the mass with respect to the installation girder 11.

  A replacement method according to an embodiment of the present invention will be described with reference to FIGS. 2 to 9. In this replacement method, three construction machines 1 are used. The three construction machines 1 are referred to as a first construction machine 1A, a second construction machine 1B, and a third construction machine 1C to be distinguished. That is, the first to third construction machines 1 are used.

  As shown in FIG. 2 (a), this replacement method is a method of changing the main girder in the replacement section X of the railway bridge from the old girder 2 to the new girder 3. The old girder 2 is an existing main girder to be removed. The new digit 3 is a main digit to be newly established. The main girder is supported by substructures such as bridge piers and abutments.

  In the present embodiment, there is a base (yard) in the left section of the section shown in FIG. First, preparation is done at the base. First, the new girder 3 is assembled. A rail fastening device and the like are incorporated in the new girder 3. Under the new girder 3, a carriage 4 for moving on the rail is temporarily provided. Prepare three construction machines 1. Then, they are connected by a coupler, and the first formation consisting of a second construction machine 1B + a new girder 3 + a first construction machine 1A + a motor car 5a is composed and stands by in the base. The second train consisting of the motor car 5b and the third construction machine 1C is constructed and stands by in the base.

  And the first formation and the second formation leave the base. The first formation and the second formation enter the site section shown in FIG. 2 from the left of the figure. In addition, this is an example, and arrangement | positioning in which right and left are reverse to this embodiment may be sufficient.

  The replacement method first has a new girder loading step. As shown in FIGS. 2 (a) to 2 (c), in the new girder loading step, the replacing section X is performed such that the first construction machine 1A, the new girder 3, and the second construction machine 1B are in this order. Carried to the section adjacent to

  The new girder loading process will be described in more detail. The first construction machine 1A, the new girder 3, and the second construction machine 1B are connected in this order and towed by the motor car 5a (first formation). The new girder 3 moves to the track straight portion (on the bridge) (see FIG. 2 (b)). Then, the second construction machine 1B and the new girder 3 are rigidly connected (see FIG. 2 (c)). In addition, it is desirable to provide a carriage for main line movement and a construction carriage for construction as the carriages 4 and 14, and to use them separately. When using different trucks, the truck for main line movement is jacked up and the construction truck is lowered. This prevents the failure of the truck on the main line. A truck for moving the main line and a truck for work may be shared.

  As shown in FIG. 3, in the new girder loading step, the first construction machine 1A, the new girder 3, and the second construction machine 1B are carried into the section adjacent to the replacement section X such that they become in this order. It will be in the state (in FIG. 3, the section to the right of the replacement section X). Then, as preparation for the next step, the third construction machine 1C is pushed by the motor car 5b (second formation) and carried in to the front of the replacement section X (in FIG. Section of

  The replacement method next has a lifting step. As shown in FIGS. 4 (a) and 4 (b), in the lifting step, the old girder 2 is lifted by the second construction machine 1B and the third construction machine 1C arranged with the switching section X interposed therebetween.

  The lifting process will be described in more detail. The 2nd construction machine 1B and the 3rd construction machine 1C are arranged on both sides of exchange section X (refer to figure 4 (a)). Then, the rails are cut at both ends of the old girder 2 and preparation for lifting the old girder 2 is made. Then, the old girder 2 is lifted by the second construction machine 1B and the third construction machine 1C (see FIG. 4 (b)). The motor car 5a, 5b opposes the force by which the second construction machine 1B and the third construction machine 1C are pulled by the weight of the old girder 2. The old girder 2 is lifted to a height at which it can be rigidly connected to the second construction machine 1B and the third construction machine 1C.

  Next, the replacement method has an old girder unloading step. As shown in FIGS. 5 (a) to 5 (c) and 6 (a) to 6 (c), in the old girder unloading step, the third construction machine 1C, the old girder 2, and the second construction machine 1B The third frame machine 1C is moved in the direction (left direction in the figure) in which the third construction machine 1C has a rigidly-knitted structure in which the new girder 3 is rigidly connected in this order, and the old girder 2 is unloaded from the replacement section X.

  The old carry-out process will be described in more detail. One end of the old girder 2 is rigidly connected to the second construction machine 1B, and the other end of the old girder 2 is rigidly connected to the third construction machine 1C (see FIG. 5A). As a result, a rigid formation is formed in which the third construction machine 1C, the old girder 2, the second construction machine 1B, and the new girder 3 are rigidly connected in this order. The first construction machine 1A is separated from the new girder 3. Then, the motor cars 5a, 5b disengage. And moving equipment is installed in rigid formation. The moving equipment is a winch 6 for pulling in and a winch 7 for applying a squeeze tension in the opposite direction. The winch 6 is equipment that is hydraulically driven and pulls the third construction machine 1C in the left direction in the figure with a wire. The winch 7 is hydraulically driven to pull the new girder 3 to the right in the figure with a wire. When moving the old girder 2, a carriage 4 for moving on the rails is temporarily provided below the old girder 2. Then, the first movement is performed (see FIG. 5 (b)). The movement distance is, for example, about 5 m. Then, the first change is performed (see FIG. 5C). In the first change, the truck 4 of the old girder 2 is transferred.

  Then, the second movement is performed (see FIG. 6A). Then, the second change is performed (see FIG. 6B). In the second change, transfer of the carriage 4 of the old girder 2 and the new girder 3 is performed. Then, the third construction machine 1C is released (see FIG. 6 (c)). The released third construction machine 1C is carried out by the motor car 5b. Then, several moves and changes are performed.

  This replacement method next has a delivery step. As shown in FIG. 7, in the delivery step, the second knitting machine 1B is a rigidly connected knitting in which the second construction machine 1B, the new girder 3, and the first construction machine 1A are rigidly connected in this order. Further move in a certain direction (left direction in FIG. 7) and send out the new digit 3 to the replacement section X.

  The delivery process will be described in more detail. The first construction machine 1A is moved by the motor car 5a and rigidly connected to the new girder 3. As a result, a rigid formation is formed in which the second construction machine 1B, the new girder 3, and the first construction machine 1A are rigidly arranged in this order. In this embodiment, at this point, the old girder 2 remains rigidly connected to the second construction machine 1B. The motor car 5b pulls and moves this rigid formation. Then, the old girder 2 is released from the second construction machine 1B and moved by the motor car 5b (left direction in FIG. 7). Then, the rigid train is further moved by the motor car 5a to send out the new girder 3 (left direction in FIG. 7).

  The replacement method next has a hanging step. As shown in FIG. 8, in the hanging step, the new girder 3 is hung by the first construction machine 1A and the second construction machine 1B, and is bridged to the replacement section X. Then, the rail of the new girder 3 and the existing rail are temporarily connected.

  The suspension process will be described in more detail. The winch 7 is connected to the first construction machine 1A by a wire, and the winch 6 is connected to the second construction machine 1B by a wire. Then, the rigid connection between the new girder 3 and the first construction machine 1A is released, and the rigid connection between the new girder 3 and the construction machine 1B is released. Then, the new girder 3 is suspended and lowered by the first construction machine 1A and the second construction machine 1B. The winch 7 and the winch 6 oppose the pulling force of the first construction machine 1A and the second construction machine 1B by the weight of the new girder 3. When the lowering of the new girder 3 is completed, the winch 7 and the winch 6 are removed.

  As shown in FIG. 9, finally, the first construction machine 1A and the second construction machine 1B are pushed by the motor car 5a and transferred to the base. Then, make a final confirmation of the rail height, set up a formwork around the girder of the new girder, and cast a non-shrink mortar.

  As mentioned above, according to the replacement construction method which concerns on this embodiment, since the movement on a rail is utilized, even if the replacement section X of a railway bridge is high from the ground, the main girder can be replaced. In addition, since the construction machine 1 having the erection girder 11 is rigidly connected to the old girder 2 or the new girder 3, the construction girder 11 functions as if it were longer by the length of the old girder 2 or the new girder 3. That is, the old girder 2 or the new girder 3 functions as a part of the erection girder. For this reason, the construction machine 1 can shorten the construction girder 11, and can pass the curve even if there is a curve near the replacement section X. Moreover, since the construction machine 1 does not need the function of sending out the main girder horizontally to the construction girder 11, the construction machine 1 can be made smaller. Therefore, the construction machine 1 can pass through the tunnel even if there is a tunnel near the replacement section X. Therefore, by using this construction machine 1, the main girder can be replaced even if there is a curve or a tunnel near the replacement section X. In addition, since the old girder 2 is carried out from the replacement section by moving on the rails, the old girder 2 does not have to be temporarily placed beside the line, and a large temporary storage space is not required near the replacement section X .

  Further, by rigidly connecting the second construction machine 1B and the new girder 3 prior to the lifting step, the new girder 3 functions as a counterbalance when lifting the old girder 2.

  In addition, since the process of releasing the third construction machine 1C and the process of releasing the old girder 2 are performed after the old girder carrying-out process, the old girder 2 is carried out from the replacement section X. Even if there is a steep track on the way to the base, you can pass the curve. In addition, since the process of releasing the third construction machine 1C and the process of releasing the old girder 2 are provided prior to the hanging process, the old girder 2 can be moved to the base in parallel with the hanging process. And the time required for the replacement method is shortened.

  The present invention is not limited to the configuration of the embodiment described above, and various modifications can be made without departing from the scope of the invention. For example, the construction machine 1 may be equipped with a counterbalance to counter the weight to be lifted. Moreover, when there are bases in the sections on both sides of the replacement section X, the formation may be the first at one of the bases, and the second formation may be the composition at the other base and carried into the site section.

1, 1A, 1B, 1C Construction machine 11 Construction girder 12 Connection structure 13 Lifting and hanging device 14 Bogie 2 Old girder (main girder)
3 New digit (main digit)
4 truck X change section

Claims (6)

This is a replacement method for replacing the main girder in the replacement section of the railway bridge from the old girder to the new girder,
The first to third construction machines are used,
A lifting step of lifting the old girder with a second construction machine and a third construction machine arranged with the replacement section interposed therebetween;
The third girder, the old girder, the second girder, and the new girder are moved in the direction of the third girder so that the rigidly-knitted structure in which the third girder is rigidly connected in this order Old carrying out process of taking out from the replacement section,
The second construction machine, the new girder and the first construction machine are moved in the direction of the second construction machine, and the new girder is replaced Sending process to the section,
And suspending the new girder with the first construction machine and the second construction machine to bridge the replacement section.
The above-mentioned construction machine has a construction member as a beam member, a connection structure for rigidly connecting the construction girder to the main girder, a lifting and lowering device for lifting and suspending the main girder, and moving on rails. A transfer method characterized by having a truck of   It is characterized by having a new girder loading process of carrying in to the section adjacent to the replacement section so that the first construction machine, the new girder and the second construction machine are in this order before the lifting process. The replacement method according to claim 1.   The method according to claim 2, further comprising the step of rigidly connecting the second construction machine and the new girder after the new girder loading step and before the lifting step.   4. The method according to claim 1, further comprising the steps of: releasing the third construction machine after the old girder unloading step and before the hanging step; and releasing the old girder. The replacement method described in any one.   The transfer method according to any one of claims 1 to 4, wherein when moving the main girder, a bogie for moving on the rails is temporarily installed under the main girder. . A construction machine used to replace the main girder in the replacement section of the railway bridge,
Construction girder as a beam member,
A connecting structure for rigidly connecting the installation girder to the main girder;
A lifting and lowering device for lifting and lifting the main girder,
An installation machine characterized by having a carriage for moving on a rail.

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