JP2018009396A - Floor slab replacement apparatus and floor slab replacement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method that can reduce the load applied to a main girder of a bridge when replacing the floor slab of the bridge more than the conventional method and eliminate the need to reinforce the main girder of the bridge during the replacement work of the slab floor.SOLUTION: Leg parts on the bridge surface of a bridge 100, which are arranged face-to-face approximately perpendicular to the bridge axial direction, are provided with two pairs of leg parts 12 arranged in the approximate bridge axial direction, a frame part 14 extending in the approximate bridge axial direction, the vicinity of both ends of which are respectively supported by one of the two pairs of leg parts 12, a track part 16 extending in the approximate bridge axial direction and supported by the frame part 14 and a hoisting means 20 capable of moving in the approximate bridge axial direction along the track part 16. The points of action where pressure from both of the leg parts 12 is applied to the bridge 100 are positioned vertically above the bridge piers 102 of the bridge 100.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a floor slab replacement device and a floor slab replacement method, and more particularly, a floor slab replacement that can be used when an existing floor slab of a bridge is removed and a new floor slab is subsequently installed on the bridge. The present invention relates to an apparatus and a floor slab replacement method using the same.

  In the floor slab replacement work, the existing floor slab is removed and the new floor slab is installed, but the existing floor slab and the new floor slab are generally installed by using a crane car installed on the bridge surface of the bridge. To do. A truck is generally used for carrying out the removed existing slab and carrying in the new slab.

  Crane vehicles and trucks are heavy, and the weights of existing and new floor slabs that crane trucks lift and trucks carry out and carry in are also heavy.

  For this reason, the load applied to the existing main girder at the time of floor slab replacement work increases, and the load carrying capacity of the main girder may be insufficient. In this case, it is necessary to reinforce the main girder.

  On the other hand, a construction method has been proposed in which a portal crane is installed on a bridge surface, and an existing floor slab is removed and a new floor slab is installed to replace the floor slab (see Patent Document 1). In this construction method, the existing floor slab is removed and the new floor slab is installed with the portal crane installed on the bridge surface, so there is no need to use a crane truck when removing the existing floor slab and installing the new floor slab. .

Japanese Patent Laid-Open No. 2006-98489

  However, in the construction method described in Patent Document 1, the weight of the portal crane installed on the bridge surface is not small, and the weight of the truck loaded with the floor slab (existing floor slab or new floor slab) is also considered. Even when the floor slab replacement work is performed using the construction method described in, it may be possible that the load applied to the main girder of the bridge becomes excessive and the main girder needs to be reinforced.

  In addition, the lack of load capacity of the main girder is likely to occur when the main girder is damaged or when aged deterioration has progressed, so when using the conventional slab replacement method, In the future, the present inventor predicts that in many cases, the load capacity of the main girder will be insufficient during the floor slab replacement work.

  The present invention has been made in view of such points, and reduces the load applied to the main girder of the bridge when replacing the floor slab of the bridge as compared with the conventional construction method. It is an object of the present invention to provide a floor slab replacement device and a floor slab replacement method that can eliminate the reinforcement of a main girder of a bridge.

  The present invention solves the above problems by the following floor slab replacement apparatus and floor slab replacement method.

That is, the floor slab replacement device according to the present invention is a floor slab replacement device used for replacement of a bridge floor slab, and is disposed on the bridge surface of the bridge so as to be opposed in a direction substantially perpendicular to the bridge axis. Two pairs of legs that are arranged in two pairs in the direction of the bridge axis, and one pair of legs of the two pairs of legs are supported near one end, and the two pairs of legs A frame portion extending in a substantially bridge axis direction supported in the vicinity of the other end by another pair of legs, and a track portion extending in a substantially bridge axis direction and supported by the frame portion; , A lifting means that can move in the direction of the bridge axis along the track portion;
The point of action of the force that the leg applies to the bridge is located vertically above the bridge pier of the bridge in any of the two pairs of legs. Is a floor slab replacement device.

  Here, the action point of the force that the leg portion applies to the bridge is the action point of the resultant force of the force that one leg portion applies to the bridge.

  It is preferable that the point of action of the force applied to the bridge by the leg is located above the fulcrum of the main girder of the bridge in any of the two pairs of legs.

  Here, the fulcrum of the main girder of the bridge is the position of a member that is attached to the upper end portion of the pier of the bridge and supports the superstructure including the main girder of the bridge.

  Preferably, the frame portion includes two truss structures formed in a substantially vertical plane substantially parallel to the bridge axis direction and extending in the substantially bridge axis direction so as to face each other in a direction substantially perpendicular to the bridge axis.

  The lifting means is preferably capable of rotating the lifted object in a substantially horizontal plane.

  The track portion includes a plurality of track members extending substantially in the direction of the bridge axis, and the floor slab replacement device spans the plurality of track members in a direction substantially perpendicular to the bridge axis, and the plurality of tracks. A long moving member attached to the plurality of track members so as to be movable in the direction of the bridge axis along the member; and the lifting means is movable in the longitudinal direction of the long moving member. It may be configured to be attached to the long moving member.

  The bridge has a plurality of lanes, and at least one lane of the plurality of lanes of the bridge may be arranged so as not to obstruct the passage of the vehicle, and the floor slab replacement device may be configured. . The floor slab replacement apparatus configured as described above will be referred to as a partial cross-section replacement type floor slab replacement apparatus.

  The floor slab replacement apparatus may be configured such that the leg portions are disposed in the vicinity of both ends of the effective width of the bridge. The floor slab replacement apparatus configured as described above will be referred to as a full-section replacement type floor slab replacement apparatus.

  A main girder support member for supporting the main girder of the bridge from above may be further provided, and the floor slab replacement device may be configured such that the main girder support member is attached to the frame portion. The floor slab replacement device configured as described above will be referred to as a main girder support type floor slab replacement device.

  The first aspect of the floor slab replacement method according to the present invention is that the existing floor slab of the bridge is removed using the floor slab replacement apparatus, and the floor slab replacement is installed at the position where the removed existing floor slab is installed. This is a floor slab replacement method characterized in that a new floor slab is installed using an apparatus.

  The second aspect of the floor slab replacement method according to the present invention is the partial cross-section replacement type floor in which the existing floor slab corresponding to a part of the cross section in the cross-sectional direction of the existing floor slab of the bridge is used. It is a floor slab replacement construction method in which a new floor slab is installed using the partial cross-section replacement type floor slab replacement device at a position where the existing floor slab removed is installed using a plate replacement device. The existing floor slab to be removed includes the existing floor slab of the lane in which the partial cross-section replacement type floor slab replacement device is installed, and does not include the existing floor slab in the area of the lane in which the bridge is in service. This is a floor slab replacement method.

  The third aspect of the floor slab replacement method according to the present invention is the removal of the existing floor slab at a portion corresponding to the entire cross section in the cross-sectional direction of the existing floor slab of the bridge using the entire cross-section replacement type floor slab replacement device. Then, the floor slab replacement construction method is characterized in that the newly installed floor slab is installed at the position where the removed existing floor slab was installed using the all-section replacement type floor slab replacement device.

  The fourth mode of the floor slab replacement method according to the present invention is the main girder support type floor slab replacement after the main girder of the bridge is supported from above by the main girder support material of the main girder support type floor slab replacement device. The existing floor slab of the bridge is removed using a device, and the new floor slab is installed on the bridge using the main girder support type floor slab replacement device at the position where the removed existing floor slab was installed. This is a floor slab replacement method.

  According to the present invention, when the bridge slab is replaced, the load applied to the main girder of the bridge is reduced as compared with the conventional method, and the reinforcement of the main girder of the bridge is not required at the time of replacing the slab. be able to.

The perspective view which shows typically the condition which is replacing the floor slab of a bridge using the floor slab replacement | exchange apparatus 10 which concerns on 1st Embodiment of this invention. The side view seen from the bridge axis perpendicular direction which shows the situation where the floor slab of a bridge is removed using floor slab exchange device 10 concerning a 1st embodiment of the present invention. III-III sectional view of FIG. 3 is an enlarged cross-sectional view of FIG. The enlarged side view of the edge part vicinity of the floor slab replacement | exchange apparatus 10 which concerns on 1st Embodiment seen from the bridge axis right angle direction Vertical sectional view in the cross-sectional direction in a state immediately after lifting the existing floor slab 106 to be removed using the floor slab replacement apparatus 10 according to the first embodiment. Crossing in a state where the existing floor slab 106 lifted by using the floor slab replacement apparatus 10 according to the first embodiment is rotated by 90 ° to change the direction, and then is moved toward the track 202 in a substantially bridge axis direction. Vertical cross section in the plane direction (transverse cross section direction that cuts the leg 12) The side view seen from the bridge axis perpendicular direction which shows the situation where the floor slab of the bridge is removed using the floor slab changing device 30 concerning a 2nd embodiment of the present invention. A vertical cross-sectional view in the cross-sectional direction showing a situation before the main girder support member 32 of the floor slab replacement device 30 according to the second embodiment is attached to the side truss 14A of the frame portion 14. A state in which the main girder support member 32 of the floor slab replacement device 30 according to the second embodiment is attached to the side truss 14A of the frame portion 14 to support the main girder 104 from above, and then the existing floor slab 106 is lifted by the lifting means 20 Vertical cross-sectional view in the cross-sectional direction showing Vertical sectional view of the cross-sectional direction of the floor slab replacement apparatus 40 according to the third embodiment of the present invention (the cross-sectional direction in which the ridge 46 is cut). The enlarged side view of the edge part vicinity of the floor slab replacement | exchange apparatus 40 which concerns on 3rd Embodiment seen from the bridge axis right angle direction Vertical sectional view of the cross-sectional direction of the floor slab replacement apparatus 50 according to the fourth embodiment of the present invention (the cross-sectional direction that cuts the flange 46) The enlarged side view of the edge part vicinity of the floor slab replacement | exchange apparatus 50 which concerns on 4th Embodiment seen from the bridge axis right angle direction The perspective view which shows typically the condition which is changing the floor slab of a bridge using the floor slab replacement | exchange apparatus 60 which concerns on 5th Embodiment of this invention. The side view seen from the bridge axis perpendicular direction which shows the situation where the floor slab of the bridge is removed using the floor slab changing device 60 concerning a 5th embodiment of the present invention. Vertical sectional view in the cross-sectional direction of the state immediately after lifting the existing floor slab 156 to be removed using the floor slab replacement device 60 of the fifth embodiment A cross section in a state in which the existing floor slab 156 suspended using the floor slab replacement device 60 of the fifth embodiment is rotated by 90 ° to change its direction and then is moved toward the track 252 in a substantially bridge axis direction. Vertical sectional view in the direction (transverse direction that cuts the leg 62 and the support 158) The perspective view which shows typically the condition which is changing the floor slab of a bridge using the floor slab replacement | exchange apparatus 80 which concerns on 6th Embodiment of this invention. The side view seen from the bridge axis perpendicular direction which shows the situation where the floor slab of the bridge is removed using floor slab exchange device 80 concerning a 6th embodiment of the present invention. A state in which the main girder support member 82 of the floor slab replacement device 80 according to the sixth embodiment is attached to the ceiling beam 84B of the frame portion 84 to support the main girder 154 from above, and then the existing floor slab 156 is lifted by the lifting means 70 Vertical cross-sectional view in the cross-sectional direction showing A state in which the main girder support member 82 of the floor slab replacement device 80 according to the sixth embodiment is attached to the ceiling beam 84B of the frame portion 84 to support the main girder 154 from above, and then the existing floor slab 156 is lifted by the lifting means 70 Vertical cross-sectional view in the cross-sectional direction showing A cross section in a state in which the existing floor slab 156 suspended using the floor slab replacement device 80 of the sixth embodiment is rotated by 90 ° and changed in direction, and then moved toward the track 252 in a substantially bridge axis direction. Vertical sectional view in the direction (cross-sectional direction cutting the leg 62 and the support 158) The flowchart which showed an example of the construction procedure in the case of replacing floor slabs about a part of section of existing floor slab 106 of bridge 100 using the floor slab replacement device concerning an embodiment of the present invention. The flowchart which showed an example of the construction procedure in the case of performing the floor slab replacement | exchange about the whole cross section of the existing floor slab 156 of the bridge 150 using the floor slab replacement | exchange apparatus which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, each embodiment of a floor slab replacement apparatus according to an embodiment of the present invention will be described in “(1) Floor slab replacement apparatus”. Then, “(2) Floor slab replacement method” describes the floor slab replacement method using the floor slab replacement device according to the embodiment of the present invention.

(1) Floor slab replacement device (1-1) Floor slab replacement device according to the first embodiment The floor slab replacement device according to the first embodiment of the present invention is a cross section in the cross-sectional direction of the existing floor slab of the bridge. It is possible to remove the existing floor slab at a portion corresponding to a part of the cross section, and to install the new floor slab at the position where the removed existing floor slab was installed.

  FIG. 1 is a perspective view schematically showing a situation in which a bridge floor slab is replaced using the floor slab replacement apparatus 10 according to the first embodiment of the present invention. FIG. 2 is a side view as seen from a direction perpendicular to the bridge axis schematically showing a situation where the floor slab of the bridge is being removed using the floor slab replacement apparatus 10 according to the first embodiment of the present invention. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is an enlarged cross-sectional view of FIG. 3 that is enlarged centering on the floor slab replacement apparatus 10, and FIG. It is a side view.

  In the description of the floor slab replacement apparatus 10 according to the first embodiment, the crosswise width of the bridge 100 of one side two lanes shown in FIG. Of the two lanes, the floor slab replacement device 10 is installed in a region having a width in the transverse direction of the lane A, which is a lane closer to the center of the bridge 100 in the direction perpendicular to the bridge axis. Therefore, even when the floor slab of the lane A of the bridge 100 is replaced using the floor slab replacement apparatus 10 of the first embodiment, the remaining three lanes (lanes B, C, D) are shown in FIG. It can be used as shown in

  The bridge 100 includes a pier 102, a main girder 104, and an existing floor slab 106, and a support 108 is provided at the upper end of the pier 102. The upper part of the support 108 is connected to the lower surface of the main girder 104, and the support 108 supports the upper structure of the bridge 100 including the main girder 104 from below, and transmits the weight of the upper structure of the bridge 100 to the pier 102. Therefore, the position of the support 108 becomes a fulcrum of the main girder 104 of the bridge 100.

  As shown in FIG. 1, an existing floor slab in a portion corresponding to a part of a cross section in a cross-sectional direction of an existing floor slab 106 of a bridge 100 using the floor slab replacement device 10 of the first embodiment. The new floor slab 200 can be installed at the position where the removed existing floor slab 106 was installed, while removing the existing 106. That is, by using the floor slab replacement apparatus 10 of the first embodiment, the existing floor slab 106 can be removed and the new floor slab 200 can be installed at the same time. The bridge axis direction and the bridge axis perpendicular direction in the bridge 100 may be simply referred to as the bridge axis direction and the bridge axis perpendicular direction, respectively.

  The floor slab replacement apparatus 10 according to the first embodiment includes a leg portion 12, a frame portion 14, a rail (track member) 16, a long moving member 18, and a lifting means 20.

  The leg portion 12 is disposed on the bridge surface of the bridge 100, transmits the weight of the entire floor slab replacement device 10 to the bridge 100, and supports the entire floor slab replacement device 10.

  As shown in FIG. 1, the leg portions 12 are arranged on the bridge surface of the bridge 100 so as to be opposed to each other in a direction substantially perpendicular to the bridge axis. As shown in FIG. 1, two pairs of leg portions 12 that are arranged so as to face each other in the direction substantially perpendicular to the bridge axis are arranged in the direction of the bridge axis. Therefore, the floor slab replacement apparatus 10 according to the first embodiment includes four legs 12 in total.

  The leg portion 12 is disposed on the bridge surface of the bridge 100 so that the point of action of the force applied to the bridge 100 is positioned vertically above the bridge pier 102 of the bridge 100 as shown in FIG. Accordingly, a member for transmitting a vertical load (for example, a sanddle) is placed between the upper surface of the bridge pier 102 and the lower surface of the existing floor slab 106 at a position vertically below each action point of the force applied to the bridge 100 by the leg 12. , The weight of the floor slab replacement device 10 and the weight of the existing floor slab 106 and the new floor slab 200 that the floor slab replacement device 10 is lifting (hereinafter referred to as “the floor slab replacement device 10”) The vertical load by the slab replacement device 10 or the like may be transmitted to the pier 102. Further, when there is a cross beam connecting the adjacent main girders 104 vertically below the point of application of the force applied by the leg 12 to the bridge 100, the upper surface of the cross beam and the lower surface of the existing floor slab 106 are provided. A vertical load due to the weight of the floor slab replacement device 10 or the like can be transmitted to the pier 102 by inserting a steel material or the like between the lower surface of the cross girder and the upper surface of the pier 102 as necessary. Here, “inserting steel or the like as necessary” means that there is a gap between the upper surface of the cross beam and the lower surface of the existing floor slab 106 or between the lower surface of the cross beam and the upper surface of the pier 102. In this case, a steel material or the like is inserted into the gap.)

  Therefore, when the floor slab replacement device 10 of the first embodiment is used to remove the existing floor slab 106 of the bridge 100 and to construct the new floor slab 200 on the bridge 100, the main girder 104 of the bridge 100 is used. The applied load is reduced as compared with the case of using the conventional construction method, and the reinforcement of the main beam 104 can be made unnecessary.

  When the point of action of the force that the leg 12 applies to the bridge 100 is positioned vertically above the support 108 of the bridge pier 102 (the fulcrum of the main girder 104) of the bridge 100, a member for transmitting a vertical load (for example, The vertical load due to the weight of the floor slab replacement device 10 and the like can be applied from the leg 12 to the main girder 104 and the support without generating a bending moment in the main girder 104 without arranging a sanddle or the like on the pier 102. It can be transmitted to the pier 102 via 108.

  Therefore, it is possible to arrange the leg portion 12 so that the point of action of the force that the leg portion 12 applies to the bridge 100 is positioned vertically above the support 108 of the bridge pier 102 of the bridge 100 (the fulcrum of the main girder 104). This is preferable in that a member is not required and a bending moment is hardly generated in the main beam 104.

  1, 3, and 4, the temporary guard fence 300 is safe for use in the lane B (see FIG. 1) even during the slab replacement work in the lane A (see FIG. 1). It is a protective fence provided to perform.

  The detailed structure of the leg part 12 is demonstrated using FIG. 4 and FIG. Specifically, the leg portion 12 includes a sanddle fixed base 12A, a sandle 12B, a saddle 12C, and a flange 12D.

  The sanddle fixing base 12A fixes the sandle 12B and distributes the reaction force received from the bridge surface of the bridge 100. For example, H-section steel can be used for the sanddle fixed base 12A.

  The sandal 12B is a main body portion of the leg portion 12, and adjusts the overall height of the leg portion 12 to ensure the necessary height of the entire leg portion 12. Scorpio 12C and saddle 12D are provided between the frame portion 14 and the sandle 12B, and connect the frame portion 14 and the leg portion 12 with a certain degree of freedom to change temperature, wind, earthquake, etc. The bending of the bridge 100 caused by the above can be absorbed. For example, H-section steel or the like can be used for the saddle 12C.

  The frame portion 14 includes two side trusses 14A formed in a substantially vertical plane substantially parallel to the bridge axis direction of the bridge 100 and extending in a substantially bridge axis direction, and a ceiling beam 14B connecting the upper ends of the two side trusses 14A. It has. The two side trusses 14A are arranged so as to face each other in a direction substantially perpendicular to the bridge axis. The ceiling beam 14B is disposed so that both ends thereof are located on the upper ends of the two side trusses 14A, and the longitudinal direction of the ceiling beam 14B is substantially perpendicular to the bridge axis. The two side trusses 14A and the ceiling beam 14B are connected by mechanical joining using bolts or the like. Further, two rails (track members) 16 are attached to the lower surface of the ceiling beam 14B by mechanical joining with bolts or the like at a predetermined interval in the direction perpendicular to the bridge axis. The connecting method between the two side trusses 14A and the ceiling beam 14B and the connecting method between the two rails (track members) 16 and the ceiling beam 14B are not particularly limited, and may be connected by welding.

  As shown in FIG. 1, the frame portion 14 is supported in the vicinity of one end by one pair of the leg portions 12 of the two pairs of leg portions 12, and the other pair of leg portions of the two pairs of leg portions 12. 12 is supported near the other end. As shown in FIG. 1, the frame portion 14 extends substantially in the bridge axis direction.

  The lower end portions of the two side trusses 14 </ b> A of the frame portion 14 are attached to the flange 12 </ b> D at the upper end portion of the leg portion 12, and the frame portion 14 is connected to the leg portion 12.

  Since the distance between the two pairs of legs 12 supporting the vicinity of both ends of the frame portion 14 is about the length of the main girder 104, the length of the frame portion 14 in the bridge axis direction becomes long. Also, since the distance between the two pairs of legs 12 supporting the vicinity of both ends of the frame portion 14 is about the length of the main girder 104, the vertical direction of the existing floor slab 106 and the new floor slab 200 that are lifted up The bending moment applied to the entire frame portion 14 due to the downward weight increases. However, since the frame portion 14 includes the two side trusses 14A, the frame portion 14 can be sufficiently supported even if the vertically lowered weights of the existing floor slab 106 and the new floor slab 200 that are lifted are applied to the frame portion 14. Note that the frame portion 14 may have a structure without a truss structure as long as the weight of the suspended existing floor slab 106 and the newly installed floor slab 200 can be sufficiently supported in the vertical direction. It is good also as a structure provided with a girder structure.

  The rails (track members) 16 are two long members extending substantially in the direction of the bridge axis, and are attached to the lower surface of the ceiling beam 14B of the frame portion 14 at a predetermined interval in the direction perpendicular to the bridge axis. Yes. As the rail (track member) 16, for example, H-section steel can be used.

  The long moving member 18 is movable between the two rails (track members) 16 in a direction substantially perpendicular to the bridge axis and along the two rails (track members) 16 in the direction of the bridge axis. Thus, the two rails (track members) 16 are attached. That is, both ends of the long moving member 18 are arranged so that the longitudinal direction is substantially perpendicular to the bridge axis and can be moved along the two rails (track members) 16 in the substantially bridge axis direction. The long moving member 18 is attached to two rails (track members) 16 and can move in a substantially bridge axis direction when power is supplied from a power source (not shown). As the long moving member 18, for example, H-section steel can be used.

  The lifting means 20 is attached to the long moving member 18 so as to be movable in the longitudinal direction of the long moving member 18. Therefore, the lifting means 20 is movable in both directions of the substantially bridge axis direction and the substantially bridge axis perpendicular direction.

  The lifting means 20 lifts and lifts the objects to be lifted (the existing floor slab 106 and the new floor slab 200) and lowers them at a predetermined position and places them on a predetermined position. The lifting means 20 includes a hook 20A for lifting an object to be lifted, and the hook 20A can be moved up and down by being supplied with power from a power source (not shown). The lifting object can be raised and lowered. Further, the lifting means 20 is configured to be able to rotate the hook 20A around a substantially vertical axis by being supplied with power from a power source (not shown), and is to be lifted by the hook 20A. The direction of the lifting object can be changed to a predetermined direction by rotating the object.

  In a state where the lifting means 20 lifts the existing floor slab 106 to a sufficient height, the long moving member 18 is moved in the direction of the bridge axis to the position of the loading platform of the truck 202, and then the lifting means 20 is moved to the existing floor slab. By lowering 106, the existing floor slab 106 cut out from the bridge 100 can be loaded onto the truck 202.

  In addition, in the state where the lifting means 20 lifts the new floor slab 200 from the track 204, the new floor slab 200 is installed at a predetermined position of the bridge 100 by moving the long moving member 18 substantially in the bridge axis direction. Can do.

  As described above, the lifting means 20 is attached to the long moving member 18 so as to be movable in the longitudinal direction of the long moving member 18, so that the lifting means 20 can move substantially in the direction perpendicular to the bridge axis. The lifting means 20 can also adjust the position of the lifting object in the direction perpendicular to the bridge axis.

  FIG. 6 is a vertical cross-sectional view in the cross-sectional direction immediately after lifting the existing floor slab 106 to be removed, and FIG. FIG. 6 is a vertical sectional view in a cross-sectional direction (a cross-sectional direction in which the leg portion 12 is cut) in a state of moving in a substantially bridge axis direction toward a track 202.

  As shown in FIG. 6, the width of the existing floor slab 106 to be removed has a width in the direction perpendicular to the bridge axis, which is larger than the width in the direction perpendicular to the bridge axis of the frame portion 14 of the floor slab replacement device 10. Since it is attached to the upper end portion of the leg portion 12, there is a space about the height of the leg portion 12 between the lower end portion of the frame portion 14 and the bridge surface of the bridge 100. For this reason, even if the width in the direction perpendicular to the bridge axis of the existing floor slab 106 to be removed is larger than the width in the direction perpendicular to the bridge axis of the frame portion 14 of the floor slab replacement apparatus 10, the existing floor slab 106 to be removed is lifted. be able to.

  The existing floor slab 106 lifted by the lifting means 20 is rotated by the lifting means 20 and changed in direction by 90 °, and then, as shown in FIG. 7, it is substantially directed toward the track 202 (see FIGS. 1 and 2). It is moved in the direction of the bridge axis and loaded on the loading platform of the truck 202.

(1-2) Floor Slab Replacement Device According to Second Embodiment FIG. 8 is a schematic view of a situation where a bridge floor slab is being removed using a floor slab replacement device 30 according to a second embodiment of the present invention. It is the side view seen from the bridge axis perpendicular direction shown in.

  The floor slab replacement device 30 according to the second embodiment of the present invention is an embodiment in which the floor slab replacement device 10 according to the first embodiment further includes a main girder support member 32. The same code | symbol is attached | subjected about the structure same as the floor slab replacement | exchange apparatus 10 which concerns on 1st Embodiment, and description is abbreviate | omitted.

  The main girder support member 32 includes a suspension member 32 </ b> A and a horizontal support member 32 </ b> B, and supports the main girder 104 from above to reduce a load of a vertical load applied to the main girder 104.

  The suspension member 32A has an upper end connected to the side truss 14A of the frame portion 14 and a lower end connected to the horizontal support member 32B. As the suspension member 32A, for example, a PC steel rod of about φ30 can be used.

  The horizontal support member 32B is a long member made of, for example, H-shaped steel and the like, and both end portions are respectively connected to the lower end portion of the suspension member 32A so that the longitudinal direction is substantially perpendicular to the bridge axis of the bridge 100. The suspension member 32A is suspended. The horizontal support member 32B is disposed below the main girder 104, and the horizontal support member 32B supports the main girder 104 from below to reduce the load of vertical load applied to the main girder 104.

  Although the main girder 104 of the bridge 100 and the existing floor slab 106 are firmly connected to form a composite girder, the strength of the main girder 104 may be insufficient if the existing floor slab 106 is removed. In such a case, it is possible to safely remove the existing floor slab 106 by supporting the main girder 104 from above with the main girder support member 32 and reducing the load of the vertical load applied to the main girder 104. it can.

  FIG. 9 is a vertical sectional view in the transverse direction showing a state before the main girder support member 32 of the floor slab replacement apparatus 30 according to the second embodiment is attached to the side truss 14A of the frame portion 14, and FIG. The main girder support member 32 of the floor slab replacement apparatus 30 according to the second embodiment is attached to the side truss 14A of the frame portion 14 to support the main girder 104 from above, and then the existing floor slab 106 is lifted by the lifting means 20. It is the vertical sectional view of the transverse section direction which shows the state.

  The ground cover height section 110 (see FIG. 9) that interferes when the suspension member 32A of the main girder support member 32 is disposed is removed in advance. Further, a through hole 112 (see FIG. 9) is provided in the existing floor slab 106 in the central portion in the transverse direction so that the suspension material 32A can be inserted.

(1-3) Floor slab replacement apparatus according to the third embodiment FIG. 11 is a vertical cross-sectional direction of the floor slab replacement apparatus 40 according to the third embodiment of the present invention. FIG. 12 is a cross-sectional view, and FIG. 12 is an enlarged side view of the vicinity of an end portion of a floor slab replacement apparatus 40 according to the third embodiment as viewed from the direction perpendicular to the bridge axis.

  The floor slab replacement device 40 according to the third embodiment of the present invention is an embodiment in which the frame portion 14 of the floor slab replacement device 10 according to the first embodiment is changed to a frame portion 42 and the leg portion 12 is eliminated. The same code | symbol is attached | subjected about the structure same as the floor slab replacement | exchange apparatus 10 which concerns on 1st Embodiment, and description is abbreviate | omitted.

  The frame part 14 of the floor slab replacement apparatus 10 according to the first embodiment is supported from below by the leg parts 12, but in the floor slab replacement apparatus 40 according to the third embodiment, a side truss 42A of the frame part 42 is provided. In addition, the leg portion 42C having a structure similar to the truss structure is provided so that the leg portion 42C is integrally included in the side truss 42A, and the leg portion 12 is eliminated.

  Further, between the leg portions 42C facing each other in the direction perpendicular to the bridge axis, a lateral support member 42D is provided between the lower end portions thereof to stabilize the structure. If safety can be confirmed, the side support member 42D may not be provided.

  Parts of the side truss 42A other than the leg portions 42C correspond to the side truss 14A of the floor slab replacement apparatus 10 according to the first embodiment and perform the same function, and the ceiling beam 42B replaces the floor slab according to the first embodiment. Corresponds to the ceiling beam 14B of the device 10 and performs the same function.

  Between the leg part 42C of the frame part 42 and the bridge surface of the bridge 100, a saddle 44 and a hook 46 are provided, and the leg part 42C of the frame part 42 and the bridge surface of the bridge 100 have a certain degree of freedom. They are connected so that they can absorb the deflection of the bridge 100 caused by temperature changes, winds, earthquakes, and the like. For the scorpio 44, for example, H-shaped steel or the like can be used.

  In the floor slab replacement device 40 according to the third embodiment of the present invention, a leg portion 42C is provided on the frame portion 42 instead of the leg portion 12 of the floor slab replacement device 10 according to the first embodiment, and the leg portion is Since it has a structure integrated with the frame part 42, the safety against falling or the like is improved compared to the floor slab replacement apparatus 10 according to the first embodiment.

  In addition, like the floor slab replacement device 30 according to the second embodiment, the floor slab replacement device 40 according to the third embodiment can be provided with the main girder support material 32 (the floor according to the third embodiment). Modification of the plate replacement device 40).

(1-4) Floor slab replacement device according to the fourth embodiment FIG. 13 is a vertical cross-sectional direction of the floor slab replacement device 50 according to the fourth embodiment of the present invention. FIG. 14 is a cross-sectional view, and FIG. 14 is an enlarged side view of the vicinity of the end of the floor slab replacement apparatus 50 according to the fourth embodiment, viewed from the direction perpendicular to the bridge axis.

  The floor slab replacement apparatus 50 according to the fourth embodiment of the present invention has a frame part 42 (the frame part 42 includes a leg part 42C) of the floor slab replacement apparatus 40 according to the third embodiment, and also functions as a leg part. This is an embodiment in which the leg portion 42C is abolished by changing to the frame portion 52 that is provided. The same code | symbol is attached | subjected about the structure same as the floor slab replacement | exchange apparatuses 10 and 40 which concern on 1st and 3rd embodiment, and description is abbreviate | omitted.

  In the floor slab replacement apparatus 40 according to the third embodiment, instead of the leg part 12 of the floor slab replacement apparatus 10 according to the first embodiment, a leg part 42C is provided in the frame part 42, and the leg part and the frame part are provided. The integrated structure improves safety against overturning and the like over the floor slab replacement apparatus 10 according to the first embodiment. However, in the floor slab replacement apparatus 50 according to the fourth embodiment, the frame portion 52 is provided. Safety itself is further improved by providing the functions of the legs themselves.

  In the floor slab replacement apparatus 50 according to the fourth embodiment, a side truss 52A having a high height is provided in the vicinity of both ends connected to the saddle 44 and the flange 46 installed on the bridge surface of the bridge 100, The side surfaces of the frame portion 52 other than both end portions are side trusses (not shown) having the same height as the floor slab replacement devices 10 and 40 according to the first and third embodiments, and the height of the upper side member is the side trusses It arrange | positions so that it may become the same as the height of the member of 52 A of the upper side. By adopting such a configuration for the frame portion 52, the frame portion 52 itself also has the function of a leg portion.

  Further, between the side trusses 52A facing each other in the direction perpendicular to the bridge axis, a lateral support member 52C is provided between the lower ends of the trusses so as to stabilize the structure. If safety can be confirmed, the side support member 52C may not be provided.

  The ceiling beam 52B of the floor slab replacement apparatus 50 according to the fourth embodiment corresponds to the ceiling beams 14B and 42B of the floor slab replacement apparatuses 10 and 40 and performs the same function.

  In addition, like the floor slab replacement apparatus 30 according to the second embodiment, the floor slab replacement apparatus 50 according to the fourth embodiment can be provided with the main girder support member 32 (the floor according to the fourth embodiment). Modification of plate change device 50).

(1-5) Floor Slab Replacement Device According to Fifth Embodiment A floor slab replacement device according to a fifth embodiment of the present invention is an existing floor slab in a portion corresponding to the entire cross section in the cross-sectional direction of an existing floor slab of a bridge. The new floor slab can be installed at the position where the removed existing floor slab was installed.

  FIG. 15: is a perspective view which shows typically the condition which is replacing the floor slab of a bridge using the floor slab replacement | exchange apparatus 60 which concerns on 5th Embodiment of this invention. FIG. 16: is the side view seen from the bridge axis orthogonal direction which shows typically the condition which is removing the floor slab of a bridge using the floor slab replacement | exchange apparatus 60 which concerns on 5th Embodiment of this invention.

  A bridge 150 that performs floor slab replacement work using the floor slab replacement apparatus 60 of the fifth embodiment includes a pier 152, a main girder 154, and an existing floor slab 156, and an upper end of the pier 152. The part is provided with a support 158. The upper part of the support 158 is connected to the lower surface of the main girder 154, and the support 158 supports the upper structure of the bridge 150 including the main girder 154 from below, and transmits the weight of the upper structure of the bridge 150 to the pier 152. Therefore, the position of the support 158 becomes a fulcrum of the main girder 154 of the bridge 150.

  As shown in FIG. 15, the floor slab replacement device 60 according to the fifth embodiment is used to remove the existing floor slab 156 at a portion corresponding to the entire cross section in the cross-sectional direction of the existing floor slab 156 of the bridge 150. The newly installed floor slab 250 can be installed at the position where the removed existing floor slab 156 was installed. That is, by using the floor slab replacement device 60 of the fifth embodiment, the existing floor slab 156 can be removed and the new floor slab 250 can be installed at the same time. The bridge axis direction and the bridge axis perpendicular direction in the bridge 150 may be simply referred to as the bridge axis direction and the bridge axis perpendicular direction, respectively.

  The floor slab replacement device 60 according to the fifth embodiment includes a leg portion 62, a frame portion 64, a rail (track member) 66, a long moving member 68, and a lifting means 70.

  The leg portion 62 is disposed on the bridge surface of the bridge 150, transmits the weight of the entire floor slab replacement device 60 to the bridge 150, and supports the entire floor slab replacement device 60.

  As shown in FIG. 15, the leg portions 62 are arranged on the bridge surface of the bridge 150 so as to be opposed to each other in a direction substantially perpendicular to the bridge axis. As shown in FIG. 15, the pair of leg portions 62 arranged so as to face each other substantially in the direction perpendicular to the bridge axis are arranged in the vicinity of both ends of the effective width of the bridge 150. As shown in FIG. 15, two pairs of leg portions 62 arranged in a pair so as to face each other in a direction substantially perpendicular to the bridge axis are arranged in the direction of the substantially bridge axis. Therefore, the floor slab replacement device 60 according to the fifth embodiment includes a total of four legs 62.

  The legs 62 are arranged on the bridge surface of the bridge 150 so that the point of action of the force applied to the bridge 150 is positioned vertically above the pier 152 of the bridge 150 as shown in FIG. Therefore, a member for transmitting a vertical load (for example, a sanddle or the like) is placed between the upper surface of the bridge pier 152 and the lower surface of the existing floor slab 156 at a position vertically below each action point of the force applied to the bridge 150 by the leg 62. , The weight of the floor slab replacement device 60 and the weight of the existing floor slab 156 and the newly installed floor slab 250 suspended by the floor slab replacement device 60 (hereinafter, The vertical load by the slab replacement device 60 may be transmitted to the pier 152. Further, when there is a cross beam connecting the adjacent main girders 154 vertically below the point of action of the force applied by the leg 62 to the bridge 150, the upper surface of the cross beam and the lower surface of the existing floor slab 156 A vertical load due to the weight of the floor slab replacement device 60 or the like can be transmitted to the pier 152 by inserting a steel material or the like between the lower surface of the cross girder and the upper surface of the pier 152 as necessary. Here, “inserting steel or the like as necessary” means that there is a gap between the upper surface of the cross beam and the lower surface of the existing floor slab 156 or between the lower surface of the cross beam and the upper surface of the pier 152. In this case, a steel material or the like is inserted into the gap.)

  Therefore, when the existing floor slab 156 of the bridge 150 is removed and the new floor slab 250 is installed on the bridge 150 using the floor slab replacement device 60 of the fifth embodiment, the main girder 154 of the bridge 150 is used. The applied load is reduced as compared with the case where the conventional method is used, and the reinforcement of the main beam 154 can be made unnecessary.

  When the point of action of the force applied by the leg 62 to the bridge 150 is located vertically above the support 158 of the bridge pier 152 of the bridge 150 (the fulcrum of the main girder 154), a member for transmitting a vertical load (for example, Even if a sanddle or the like is not arranged on the upper part of the pier 152, a vertical load due to the weight of the floor slab replacement device 60 or the like is applied from the leg 62 to the main girder 154 and the support without generating a bending moment in the main girder 154. 158 can be transmitted to the pier 152.

  Therefore, it is possible to arrange the leg portion 62 so that the point of action of the force applied by the leg portion 62 to the bridge 150 is located vertically above the support 158 of the bridge pier 152 of the bridge 150 (the fulcrum of the main girder 154). This is preferable in that a member is not required and a bending moment is hardly generated in the main beam 154.

  In addition, since the structure of the leg part 62 is the same as that of the leg part 12 of the floor slab replacement | exchange apparatus 10 of 1st Embodiment, description of the detailed structure of the leg part 62 is abbreviate | omitted.

  Further, the frame portion 42 of the third embodiment can be used in place of the frame portion 64 of the fifth embodiment. In this case, since the frame portion 42 includes the leg portion 42C, the leg portion 62 is unnecessary. Become.

  Further, the frame portion 52 of the fourth embodiment can be used in place of the frame portion 64 of the fifth embodiment. In this case, since the frame portion 52 itself has a function of a leg portion, the leg portion 62 is It becomes unnecessary.

  The frame portion 64 includes two side trusses 64A formed in a substantially vertical plane substantially parallel to the bridge axis direction of the bridge 150 and extending in the substantially bridge axis direction, and a ceiling beam 64B connecting the upper ends of the two side trusses 64A. It has. The two side trusses 64A are arranged so as to face each other substantially in the direction perpendicular to the bridge axis. The ceiling beam 64B is disposed so that both ends thereof are located on the upper ends of the two side trusses 64A, and the longitudinal direction of the ceiling beam 64B is substantially perpendicular to the bridge axis. The two side trusses 64A and the ceiling beam 64B are connected by mechanical joining using bolts or the like. Further, two rails (track members) 66 are attached to the lower surface of the ceiling beam 64B by mechanical joining with bolts or the like at a predetermined interval in the direction perpendicular to the bridge axis. The connection method between the two side trusses 64A and the ceiling beam 64B and the connection method between the two rails (track members) 66 and the ceiling beam 64B are not particularly limited, and may be connected by welding.

  As shown in FIG. 15, the frame portion 64 is supported in the vicinity of one end portion by the pair of leg portions 62 of the two pairs of leg portions 62, and the other pair of leg portions of the two pairs of leg portions 62. The vicinity of the other end is supported by 62. As shown in FIG. 15, the frame portion 64 extends substantially in the bridge axis direction.

  The lower end portions of the two side trusses 64 </ b> A of the frame portion 64 are attached to a hook (not shown) at the upper end portion of the leg portion 62, and the frame portion 64 is connected to the leg portion 62.

  Since the distance between the two pairs of legs 62 supporting the vicinity of both ends of the frame portion 64 is about the length of the main girder 154, the length of the frame portion 64 in the bridge axis direction becomes long. Further, since the distance between the two pairs of leg portions 62 supporting the vicinity of both ends of the frame portion 64 is about the length of the main girder 154, the vertical direction of the existing floor slab 156 and the new floor slab 250 that are lifted up The bending moment applied to the entire frame portion 64 due to the downward weight increases. However, since the frame portion 64 includes the two side trusses 64 </ b> A, it can be sufficiently supported even when the weights of the suspended existing floor slab 156 and the newly installed floor slab 250 are applied to the frame portion 64. In addition, the floor slab replacement device 60 according to the fifth embodiment removes the existing floor slab at the portion corresponding to the entire cross section in the cross-sectional direction of the existing floor slab of the bridge, and the removed existing floor slab is installed. Since the newly installed floor slab is installed at the position where it has been, the side truss 64A of the floor slab replacement device 60 according to the fifth embodiment is more perpendicular to the bridge truss 14A than the side truss 14A of the floor slab replacement device 10 according to the first embodiment. The amount of steel is increasing in the direction. However, as long as the weight of the existing floor slab 156 and the newly installed floor slab 250 that are lifted can be sufficiently supported in the vertical direction, the frame part 64 may have a structure without a truss structure. It is good also as a structure provided with a girder structure.

  The rails (track members) 66 are two long members extending substantially in the direction of the bridge axis, and are attached to the lower surface of the ceiling beam 64B of the frame portion 64 at a predetermined interval in the direction perpendicular to the bridge axis. Yes. As the rail (track member) 66, for example, H-section steel can be used.

  FIG. 17 is a vertical sectional view in the cross-sectional direction immediately after lifting the existing floor slab 156 to be removed using the floor slab replacement device 60 of the fifth embodiment, and FIG. 18 is the fifth embodiment. After the existing floor slab 156 lifted by using the floor slab replacement device 60 is rotated by 90 ° to change its direction, it is moved substantially in the direction of the bridge axis toward the track 252 (see FIGS. 15 and 16). It is a vertical sectional view of the state of the transverse cross section (transverse cross section direction that cuts the leg portion 62 and the support 158).

  The long moving member 68 can move between the two rails (track members) 66 in a direction substantially perpendicular to the bridge axis and can move along the two rails (track members) 66 in the direction of the bridge axis. Thus, the two rails (track members) 66 are attached. That is, both ends of the long moving member 68 are arranged so that the longitudinal direction is substantially perpendicular to the bridge axis and can be moved along the two rails (track members) 66 in the substantially bridge axis direction. It is attached to two rails (track members) 66, and the long moving member 68 can move in a substantially bridge axis direction by being supplied with power from a power source (not shown). As the long moving member 68, for example, H-section steel can be used.

  The lifting means 70 is attached to the long moving member 68 so as to be movable in the longitudinal direction of the long moving member 68. Therefore, the lifting means 70 is movable in both directions of the substantially bridge axis direction and the substantially bridge axis perpendicular direction.

  The lifting means 70 lifts and lifts the objects to be lifted (the existing floor slab 156 and the new floor slab 250) and lowers them at a predetermined position and places them on a predetermined position. The lifting means 70 includes a hook 70A for lifting an object to be lifted, and the hook 70A can be moved up and down by being supplied with power from a power source (not shown). The lifting object can be raised and lowered. Further, the lifting means 70 is configured to be able to rotate the hook 70A about a substantially vertical axis by being supplied with power from a power source (not shown), and is to be lifted by the hook 70A. The direction of the lifting object can be changed to a predetermined direction by rotating the object.

  In a state where the lifting means 70 lifts the existing floor slab 156 to a sufficient height, the long moving member 68 is moved in the direction of the bridge axis to the position of the loading platform of the truck 252, and then the lifting means 70 is moved to the existing floor slab. By lowering 156, the existing floor slab 156 cut out from the bridge 150 can be loaded on the truck 252.

  Further, in a state where the lifting means 70 lifts the new floor slab 250 from the truck 254, the new floor slab 250 is installed at a predetermined position of the bridge 150 by moving the long moving member 68 substantially in the direction of the bridge axis. Can do.

  As described above, since the lifting means 70 is attached to the long moving member 68 so as to be movable in the longitudinal direction of the long moving member 68, the lifting means 70 can move substantially in the direction perpendicular to the bridge axis. The lifting means 70 can also adjust the position of the lifting object in the direction perpendicular to the bridge axis.

  As shown in FIG. 17, the width of the existing floor slab 156 to be removed has a width in the direction perpendicular to the bridge axis that is larger than the width of the frame part 64 of the floor slab replacement device 60 in the direction perpendicular to the bridge axis. Since 64 is attached to the upper end portion of the leg portion 62, there is a space about the height of the leg portion 62 between the lower end portion of the frame portion 64 and the bridge surface of the bridge 150. For this reason, even if the width of the existing floor slab 156 to be removed is larger than the width of the frame 64 of the floor slab replacement device 60 in the direction perpendicular to the bridge axis, the existing floor slab 156 to be removed is lifted. be able to.

  The existing floor slab 156 lifted by the lifting means 70 is rotated by the lifting means 70 and changed in direction by 90 ° as shown in FIG. Load on 252 cargo bed.

(1-6) Floor Slab Replacement Device According to Sixth Embodiment FIG. 19 schematically illustrates a situation where a bridge slab is being replaced using a floor slab replacement device 80 according to the sixth embodiment of the present invention. It is a perspective view shown in FIG. FIG. 20: is the side view seen from the bridge axis orthogonal direction which shows typically the condition which is removing the floor slab of a bridge using the floor slab replacement | exchange apparatus 80 which concerns on 6th Embodiment of this invention.

  The floor slab replacement apparatus 80 according to the sixth embodiment of the present invention is an embodiment in which a main girder support member 82 is further provided in the floor slab replacement apparatus 60 according to the fifth embodiment. The same code | symbol is attached | subjected about the structure same as the floor slab replacement | exchange apparatus 60 which concerns on 5th Embodiment, and description is abbreviate | omitted.

  The main girder support member 82 includes a suspension member 82 </ b> A and a horizontal support member 82 </ b> B, and supports the main girder 154 from above to reduce a load of a vertical load applied to the main girder 154.

  The suspension member 82A has an upper end connected to the ceiling beam 84B of the frame portion 84 and a lower end connected to the horizontal support member 82B. As the suspension member 82A, for example, a PC steel rod of about φ30 can be used. As shown in FIG. 19, the ceiling beam 84 </ b> B is longer than the width of the upper work of the bridge 150 in the direction perpendicular to the bridge axis so that the suspension member 82 </ b> A does not interfere with the upper work of the bridge 150.

  The horizontal support member 82B is a long member made of, for example, H-shaped steel, and both ends thereof are connected to the lower ends of the suspension members 82A, respectively, so that the longitudinal direction is substantially perpendicular to the bridge axis of the bridge 150. , Suspended by a suspension material 82A. The horizontal support member 82B is disposed below the main girder 154, and the horizontal support member 82B supports the main girder 154 from below to reduce the load of the vertical load applied to the main girder 154.

  Although the main girder 154 of the bridge 150 and the existing floor slab 156 are firmly connected to form a composite girder, the strength of the main girder 154 may be insufficient when the existing floor slab 156 is removed. In such a case, the existing girder 156 can be removed safely by supporting the main girder 154 from above with the main girder support member 82 and reducing the load of the vertical load applied to the main girder 154. it can.

  21 and 22 are cross-sectional directions showing a state in which the existing girder 156 is lifted by the lifting means 70 after the main girder support member 82 is attached to the ceiling beam 84B of the frame portion 84 and the main girder 154 is supported from above. FIG.

  FIG. 21 shows a state where the existing floor slab 156 is lifted by the lifting means 70 with the upper surface of the upper flange of the main girder 154 and the lower surface of the existing floor slab 156 cut off, and the main girder 154 and existing floor slab are shown. It is assumed that the connection state with 156 is a non-synthetic girder that cannot be said to be particularly strong. 22 shows a state in which the upper part of the web of the main girder 154 is cut in the direction of the bridge axis, and the upper flange of the main girder 154 and the upper part of the web are lifted by the lifting means 70 together with the existing floor slab 156. The case where the connection state of the girder 154 and the existing floor slab 156 is a strong composite girder is assumed.

  As shown in FIG. 21 or FIG. 22, the existing floor slab 156 is cut from the main girder 154 and lifted by the lifting means 70, and the existing floor slab 156 is rotated by the lifting means 70, as shown in FIG. After changing the direction by 90 °, the direction is moved toward the truck 252 (see FIGS. 19 and 20) in the direction of the bridge axis, and the truck 252 is loaded.

(2) Floor slab replacement method (2-1) Floor slab replacement method for a part of the cross section of the existing floor slab Existing part corresponding to a part of the cross section in the cross-sectional direction of the existing floor slab of the bridge The floor slab is removed, and the new slab is installed at the position where the removed existing slab was installed (hereinafter, referred to as “replacement of some slabs”). The construction procedure will be described by taking as an example the case where the existing floor slab 106 in the lane A (see FIG. 1) of the bridge 100 is replaced with the new floor slab 200.

  When replacing the floor slab for a part of the cross section, the floor slab replacement apparatuses 10, 30, 40, 50, and the first embodiment according to the first to fourth embodiments described in “(1) Floor slab replacement apparatus”. 3. A modified example of the floor slab replacement device 40, 50 in which the main girder support member 32 is provided in the floor slab replacement device 40, 50 according to the fourth embodiment, depending on the necessity of the main girder support member 32. Here, the floor slab replacement device 10 according to the first embodiment that does not include the main girder support member 32 and the main plate support member 32 are included in the floor slab replacement device 10 according to the first embodiment. The floor slab replacement apparatus 30 according to the second embodiment will be described on the assumption that the floor slab replacement apparatus 30 is used by performing properly according to the necessity of the main girder support member 32.

  FIG. 24 is a flowchart showing a construction procedure when replacing the floor slab with respect to a partial cross section of the existing floor slab 106 of the bridge 100.

  Since the slab replacement work to replace the existing floor slab 106 in the lane A of the bridge 100 with the new floor slab 200, the lanes B, C, and D of the bridge 100 continue to be in service, so there is a protective fence between the lane A and the lane A. In order to ensure the safety of passage of the vehicle in the lane B that is not provided, a temporary protective fence 300 is provided as shown in FIG. 1 and the like (step S101).

  Next, the pavement in the target area of the floor slab replacement in lane A is removed (step S102).

  Next, the influence of the removal of the existing floor slab 106 on the main girder 104 is scrutinized to determine whether it is necessary to support the main girder 104 (step S103). The floor slab replacement apparatus 10 that does not include the main girder support member 32 is installed (step S104), and if it is determined that the main girder 104 needs to be supported, the floor slab replacement apparatus 30 that includes the main girder support member 32 is installed. (Step S105).

  When it is determined that the main girder 104 needs to be supported and the floor slab replacement device 30 including the main girder support member 32 is installed in step S105, the existing members that interfere with the main girder support member 32 to be installed are cut and removed. I do. As the cutting / removal of the existing member that interferes, it is conceivable to cut / remove the ground cover column 110 (see FIG. 9) or to provide a through hole 112 (see FIG. 9) in the existing floor slab 106.

  After the floor slab replacement apparatus 10 is installed in step S104 or the floor slab replacement apparatus 30 is installed in step S105, the existing floor slab 106 in the target area for floor slab replacement is cut and removed (step S106).

  Then, the installation work of the new floor slab 200 is performed in the target area of the floor slab replacement after the existing floor slab 106 has been cut and removed (step S107).

  After the installation work of the new floor slab 200 is completed, the floor slab replacement apparatuses 10 and 30 are removed (step S108). Subsequently, when replacing the floor slab with respect to the area of the other existing floor slab 106 of the bridge 100, the floor slab replacement apparatuses 10 and 30 are moved to the next target area and the same construction is advanced.

(2-2) Floor slab replacement method for the entire cross section of the existing floor slab The existing floor slab is removed from the site corresponding to the entire cross section in the cross-sectional direction of the existing floor slab of the bridge, and the removed existing slab is installed. The installation procedure of the floor slab replacement (hereinafter referred to as “floor slab replacement for all cross sections”) to install the new floor slab in the existing position is the existing construction of the bridge 150 (see FIG. 15, FIG. 19 etc.) The case where the floor slab 156 is replaced with the new floor slab 250 will be described as an example.

  When replacing the floor slab for the entire cross section, the floor slab replacement apparatuses 60 and 80 according to the fifth and sixth embodiments described in “(1) Floor slab replacement apparatus” are required for the main girder support member 82. Since it can be used properly according to the nature, here, in the sixth embodiment provided with the floor slab replacement device 60 and the main girder support material 82 according to the fifth embodiment not provided with the main girder support material 82. Such a floor slab replacement device 80 will be described as being used by properly using it according to the necessity of the main girder support member 82.

  FIG. 25 is a flowchart showing a construction procedure in the case of replacing the floor slab with respect to the entire cross section of the existing floor slab 156 of the bridge 150.

  First, the pavement in the target area for floor slab replacement is removed (step S201).

  Next, the influence of the removal of the existing floor slab 156 on the main girder 154 is scrutinized to determine whether or not the main girder 154 needs to be supported (step S202). The floor slab replacement device 60 without the main girder support member 82 is installed (step S203), and if it is determined that the main girder 154 needs to be supported, the floor slab replacement device 80 with the main girder support member 82 is installed. (Step S204).

  When it is determined that the main girder 154 needs to be supported and the floor slab replacement device 80 including the main girder support member 82 is installed in step S204, the existing members that interfere with the main girder support member 82 are cut and removed. I do. As the cutting / removal of the existing members that interfere with each other, it is conceivable to cut / remove the ground cover column or to provide a through hole in the existing floor slab 156.

  After the floor slab replacement device 60 is installed in step S203 or the floor slab replacement device 80 is installed in step S204, the existing floor slab 156 in the target area of the floor slab replacement is cut and removed (step S205).

  Then, the installation work of the new floor slab 250 is performed in the target area of the floor slab replacement after the existing floor slab 156 has been cut and removed (step S206).

  After the installation work of the new floor slab 250 is completed, the floor slab replacement devices 60 and 80 are removed (step S207). Subsequently, when replacing the floor slab with respect to the area of the other existing floor slab 156 of the bridge 150, the floor slab replacement devices 60 and 80 are moved to the next target area and the same construction is advanced.

10, 30, 40, 50, 60, 80 ... floor slab changing device 12, 42C, 62 ... leg 12A ... sanddle fixed base 12B ... sandle 12C, 44 ... saddle 12D, 46 ... cage 14, 42, 52, 64 , 84: Frame portion 14A, 42A, 52A, 64A, 84A ... Side truss 14B, 42B, 52B, 64B, 84B ... Ceiling beam 16, 66 ... Rail (track member)
18, 68 ... Long moving member 20, 70 ... Lifting means 20A, 70A ... Hook 32, 82 ... Main girder support member 32A, 82A ... Suspension member 32B, 82B ... Horizontal support member 42D, 52C ... Horizontal support member 100, 150 ... Bridges 102, 152 ... Piers 104, 154 ... Main girders 106, 156 ... Existing floor slabs 108, 158 ... Bearings 110 ... Ground cover columns 112 ... Through holes 200, 250 ... New floor slabs 202, 204, 252, 254 ... Truck 300 ... Temporary guard fence AD ... Lane

Claims (12)

A floor slab replacement device used to replace a bridge floor slab,
Two pairs of leg portions in which two pairs of leg portions arranged to face each other in a direction substantially perpendicular to the bridge axis on the bridge surface of the bridge are arranged in a substantially bridge axis direction;
A substantially bridge shaft that is supported in the vicinity of one end by a pair of legs of the two pairs of legs, and is supported in the vicinity of the other end by another pair of legs of the two pairs of legs. A frame portion extending in a direction;
A track portion extending substantially in the bridge axis direction and supported by the frame portion;
A lifting means capable of moving in a substantially bridge axis direction along the track portion;
With
The point of action of the force that the leg portion applies to the bridge is located above the bridge pier of the bridge in any leg portion of the two pairs of leg portions. Replacement device.   The point of action of the force that the leg portion applies to the bridge is located vertically above the fulcrum of the main girder of the bridge in any of the two pairs of leg portions. The floor slab replacement apparatus according to claim 1.   The frame portion includes two truss structures formed in a substantially vertical plane substantially parallel to the bridge axis direction and extending in a substantially bridge axis direction so as to face each other in a direction substantially perpendicular to the bridge axis. The floor slab replacement apparatus according to claim 1 or 2.   The floor slab replacement apparatus according to claim 1, wherein the lifting means is capable of rotating the lifted object in a substantially horizontal plane. The track portion is composed of a plurality of track members extending substantially in the bridge axis direction,
The floor slab replacement device is configured to bridge the plurality of track members in a direction substantially perpendicular to the bridge axis and to move in the bridge axis direction along the plurality of track members. A long moving member attached to the raceway member;
The floor slab replacement apparatus according to any one of claims 1 to 4, wherein the lifting means is attached to the long moving member so as to be movable in a longitudinal direction of the long moving member.   6. The bridge has a plurality of lanes, and at least one lane of the plurality of lanes of the bridge is arranged so as not to prevent a vehicle from passing. The floor slab replacement device according to any one of the above.   The floor slab replacement apparatus according to any one of claims 1 to 6, wherein the legs are disposed in the vicinity of both ends of the effective width of the bridge.   The floor slab according to any one of claims 1 to 7, further comprising a main girder support member that supports the main girder of the bridge from above, and the main girder support member is attached to the frame portion. Replacement device.   The existing floor slab of the bridge is removed using the floor slab replacement device according to any one of claims 1 to 8, and is newly installed using the floor slab replacement device at a position where the removed existing floor slab is installed. A floor slab replacement method characterized by installing a floor slab.   The existing floor slab is removed by using the floor slab replacement device according to claim 6 by removing the existing floor slab at a portion corresponding to a part of the cross section in the cross-sectional direction of the existing floor slab of the bridge. Is a floor slab replacement method in which a new floor slab is installed using the floor slab replacement device at the position where the floor slab is installed, and the existing floor slab to be removed is an existing floor slab of the lane in which the floor slab replacement device is installed And an existing floor slab in the area of the lane in which the bridge is in service is not included.   The position where the existing floor slab of the portion corresponding to the entire cross section in the cross-sectional direction of the existing floor slab of the bridge is removed using the floor slab replacement device according to claim 7, and the removed existing floor slab is installed The floor slab replacement method is characterized in that a new floor slab is installed using the floor slab replacement device.   The existing slab of the bridge is removed by using the floor slab replacement device after the main girder of the bridge is supported from above by the main girder support member of the floor slab replacement device according to claim 8. A floor slab replacement method characterized in that a new floor slab is installed on the bridge using the floor slab replacement device at a position where the floor slab has been installed.

Images