Method for replacing bridge decks

Abstract

To provide an efficient change-over method of a floor slab.SOLUTION: In the change-over method of a floor slab, the following steps (1)-(4) are repeated, while a moving crane 10 sequentially moves in a proceeding direction of change-over work on the raw of an existing floor slab 2. (1) The moving crane 10 has a suspension point at a position extending in the direction opposite to the proceeding direction, and suspends the existing floor slab 2 to remove (a). (2) After an empty load transport vehicle 20 approaches under the suspension point of the moving crane 10, the moving crane 10 hangs down the existing floor slab 2 onto the transport vehicle 20, and retreats the transport vehicle 20 with the existing floor slab 2 loaded thereon (b-c). (3) After the transport vehicle 20 for a new floor slab carrying-in proceeds under the suspension point of the moving crane 10, the moving crane 10 suspends a new floor slab 2N from the transport vehicle 20, and the transport vehicle 20 is retreated in an empty load state (d-f). (4) The moving crane 10 returns to the position of the existing floor slab removal, and the new floor slab 2N is hung down at the position from which the existing floor slab 2 is removed, to be installed (g).SELECTED DRAWING: Figure 3

Claims

1. A method for replacing deck slabs, which involves using a lifting and moving machine capable of lifting and moving deck slabs, to sequentially replace rows of deck slabs in a single direction of travel, The bridge whose deck slab is to be replaced has multiple lanes, including the first lane and the second lane. While the deck replacement method is being carried out in the first lane, general vehicles are permitted to pass in the second lane. A temporary protective barrier is installed on the end of the second lane adjacent to the first lane. The lifting and moving machine moves along the rows of existing deck slabs and has a lifting point at a position that extends from the lifting and moving machine in the direction opposite to the direction of the deck replacement work. The aforementioned replacement work is, (1) The existing deck slab removal process involves lifting and removing the existing deck slab using the lifting and moving machine, (2) The lifting and moving machine lifts the existing deck slab and moves in the direction of the replacement work, a transport vehicle for removing the existing deck slab is positioned below the lifting point of the lifting and moving machine, and thereafter the lifting and moving machine lowers the existing deck slab onto the transport vehicle for removing the existing deck slab, and the existing deck slab is loaded onto the transport vehicle for removing the existing deck slab and removed, in an existing deck slab removal process, (3) A new floor slab delivery process in which a transport vehicle for delivering the new floor slab is positioned below the lifting point of the lifting and moving machine, the lifting and moving machine then lifts the new floor slab from the transport vehicle for delivering the new floor slab, and then the transport vehicle for delivering the new floor slab exits, (4) A new floor slab installation process in which the lifting and moving machine moves in the opposite direction to the direction of the replacement work and lowers and installs the new floor slab, Includes, In the process of removing the existing deck slab, before the lifting and moving machine lowers the existing deck slab onto the transport vehicle for removing the existing deck slab, the existing deck slab is rotated by 90°, thereby changing the longitudinal direction of the existing deck slab from the direction perpendicular to the bridge axis to the direction in the bridge axis direction. The lifting and moving machine is supported on rows of existing floor slabs at its left and right ground contact points, and has a space between the left and right ground contact points through which the transport vehicle can pass. A method for replacing a floor slab, wherein, in the process of removing the existing floor slab, the transport vehicle moves through the space between the left and right ground contact points of the lifting and moving machine when the transport vehicle enters below the lifting point of the lifting and moving machine.

2. A method for replacing deck slabs, which involves using a lifting and moving machine capable of lifting and moving deck slabs, to sequentially replace rows of deck slabs in a single direction of travel, The bridge whose deck slab is to be replaced has multiple lanes, including the first lane and the second lane. While the deck replacement method is being carried out in the first lane, general vehicles are permitted to pass in the second lane. A temporary protective barrier is installed on the end of the second lane adjacent to the first lane. The lifting and moving machine moves along the rows of existing deck slabs and has a lifting point at a position that extends from the lifting and moving machine in the direction opposite to the direction of the deck replacement work. The aforementioned replacement work is, (1) The existing deck slab removal process involves lifting and removing the existing deck slab using the lifting and moving machine, (2) The lifting and moving machine lifts the existing deck slab and moves in the direction of the replacement work, a transport vehicle for removing the existing deck slab is positioned below the lifting point of the lifting and moving machine, and thereafter the lifting and moving machine lowers the existing deck slab onto the transport vehicle for removing the existing deck slab, and the existing deck slab is loaded onto the transport vehicle for removing the existing deck slab and removed, in an existing deck slab removal process, (3) A new floor slab delivery process in which a transport vehicle for delivering the new floor slab is positioned below the lifting point of the lifting and moving machine, the lifting and moving machine then lifts the new floor slab from the transport vehicle for delivering the new floor slab, and then the transport vehicle for delivering the new floor slab exits, (4) A new floor slab installation process in which the lifting and moving machine moves in the opposite direction to the direction of the replacement work and lowers and installs the new floor slab, Includes, In the aforementioned process of installing the new deck slab, before lowering the new deck slab, the new deck slab is rotated by 90°, thereby changing the longitudinal direction of the new deck slab from the direction of the bridge axis to the direction perpendicular to the bridge axis. The lifting and moving machine is supported on rows of existing floor slabs at its left and right ground contact points, and has a space between the left and right ground contact points through which the transport vehicle can pass. A method for replacing a floor slab, wherein, in the process of transporting a newly installed floor slab, the transport vehicle moves through the space between the left and right ground contact points of the lifting and moving machine when the transport vehicle enters below the lifting point of the lifting and moving machine.

3. The method for replacing a deck slab according to claim 1 or claim 2, wherein the lifting point is provided on the tip side of a girder that is supported on the upper part of the lifting mobile machine and extends from the lifting mobile machine in the opposite direction.

4. A method for replacing deck slabs, which involves using a lifting and moving machine capable of lifting and moving deck slabs, to sequentially replace rows of deck slabs in a deck slab replacement area in one direction of travel, The lifting and moving machine moves along the rows of existing deck slabs and has a lifting point at a position that extends from the lifting and moving machine in the direction opposite to the direction of the deck replacement work. In the aforementioned deck replacement area, the replacement work is carried out as follows: (1) The existing deck slab removal process involves lifting and removing the existing deck slab using the lifting and moving machine, (2) The lifting and moving machine lifts the existing deck slab and moves in the direction of the replacement work, a transport vehicle for removing the existing deck slab is positioned below the lifting point of the lifting and moving machine, and thereafter the lifting and moving machine lowers the existing deck slab onto the transport vehicle for removing the existing deck slab, and the existing deck slab is loaded onto the transport vehicle for removing the existing deck slab and removed, in an existing deck slab removal process, (3) A new floor slab delivery process in which a transport vehicle for delivering the new floor slab is positioned below the lifting point of the lifting and moving machine, the lifting and moving machine then lifts the new floor slab from the transport vehicle for delivering the new floor slab, and then the transport vehicle for delivering the new floor slab exits, (4) A new floor slab installation process in which the lifting and moving machine moves in the opposite direction to the direction of the replacement work and lowers and installs the new floor slab, Includes, In the process of removing the existing deck slab, before the lifting and moving machine lowers the existing deck slab onto the transport vehicle for removing the existing deck slab, the existing deck slab is rotated by 90°, thereby changing the longitudinal direction of the existing deck slab from the direction perpendicular to the bridge axis to the direction in the bridge axis direction. The lifting and moving machine is supported on rows of existing floor slabs at its left and right ground contact points, and has a space between the left and right ground contact points through which the transport vehicle can pass. A method for replacing a floor slab, wherein, in the process of removing the existing floor slab, the transport vehicle moves through the space between the left and right ground contact points of the lifting and moving machine when the transport vehicle enters below the lifting point of the lifting and moving machine.

5. The method for replacing a bridge deck according to claim 4, wherein the transport vehicle for removing the existing bridge deck is a tire-type trailer or truck that can travel on public roads.

6. A method for replacing deck slabs, which involves using a lifting and moving machine capable of lifting and moving deck slabs, to sequentially replace rows of deck slabs in a deck slab replacement area in one direction of travel, The lifting and moving machine moves along the rows of existing deck slabs and has a lifting point at a position that extends from the lifting and moving machine in the direction opposite to the direction of the deck replacement work. In the aforementioned deck replacement area, the replacement work is carried out as follows: (1) The existing deck slab removal process involves lifting and removing the existing deck slab using the lifting and moving machine, (2) The lifting and moving machine lifts the existing deck slab and moves in the direction of the replacement work, a transport vehicle for removing the existing deck slab is positioned below the lifting point of the lifting and moving machine, and thereafter the lifting and moving machine lowers the existing deck slab onto the transport vehicle for removing the existing deck slab, and the existing deck slab is loaded onto the transport vehicle for removing the existing deck slab and removed, in an existing deck slab removal process, (3) A new floor slab delivery process in which a transport vehicle for delivering the new floor slab is positioned below the lifting point of the lifting and moving machine, the lifting and moving machine then lifts the new floor slab from the transport vehicle for delivering the new floor slab, and then the transport vehicle for delivering the new floor slab exits, (4) A new floor slab installation process in which the lifting and moving machine moves in the opposite direction to the direction of the replacement work and lowers and installs the new floor slab, Includes, In the aforementioned process of installing the new deck slab, before lowering the new deck slab, the new deck slab is rotated by 90°, thereby changing the longitudinal direction of the new deck slab from the direction of the bridge axis to the direction perpendicular to the bridge axis. The lifting and moving machine is supported on rows of existing floor slabs at its left and right ground contact points, and has a space between the left and right ground contact points through which the transport vehicle can pass. A method for replacing a floor slab, wherein, in the process of transporting a newly installed floor slab, the transport vehicle moves through the space between the left and right ground contact points of the lifting and moving machine when the transport vehicle enters below the lifting point of the lifting and moving machine.

7. The method for replacing a bridge deck according to claim 6, wherein the transport vehicle for bringing in the new bridge deck is a tire-type trailer or truck that can travel on public roads.

8. The method for replacing a deck slab according to any one of Claims 4 to 7, wherein the lifting point is provided on the tip side of a girder that is supported on the upper part of the lifting mobile machine and extends from the lifting mobile machine in the opposite direction.

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