Method for removing the deck slab

Abstract

This invention provides a method for removing and installing bridge decks that enables efficient bridge deck replacement work. [Solution] The method for removing the deck slabs comprises a peeling step in which, among a plurality of existing deck slabs 201 installed on a fixed surface G1 and arranged adjacent to each other in the first direction, an existing deck slab 201 located at one end in the first direction is peeled from the fixed surface G1, and then the existing deck slab 201 adjacent to the peeled existing deck slab 201 is peeled, and this process is repeated to peel off a plurality of existing deck slabs 201; and a rail section installation step in which a rail section extending in the first direction is installed. In the peeling step, a deck slab peeling device 7 that is movable along the rail section and peels the existing deck slabs 201 from the fixed surface G1 is used to peel off a plurality of existing deck slabs 201.

Description

Technical Field

[0001] The present invention relates to a method for removing a floor slab.

Background Art

[0002] Conventionally, in the work of renewing (replacing) a floor slab, in the case of a two-lane road, the construction is carried out by closing one lane of the road and performing oncoming traffic on the other lane. Patent Document 1 below discloses a floor slab renewal work of semi-section construction.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] For the demolition of an existing floor slab, cutting work with an adjacent floor slab and peeling work with a fixed surface such as a supporting girder are required. However, the floor slab replacement device disclosed in Patent Document 1 does not have a peeling device for an existing floor slab. Therefore, it is assumed that a peeling device is attached to a hoisting machine such as a crane and implemented, which is a problem causing a decrease in work efficiency.

[0005] Therefore, the present invention has been made in view of the above circumstances, and provides a method for removing a floor slab that can efficiently perform the renewal work of the floor slab.

Means for Solving the Problems

[0006] In order to achieve the above object, the present invention employs the following means. In other words, the method for removing a floor slab according to the present invention comprises a peeling step of peeling off a plurality of existing floor slabs that are installed on a fixed surface and arranged adjacent to each other in a first direction, by peeling off the existing floor slab located at one end in the first direction from the fixed surface, and then peeling off the existing floor slab adjacent to the peeled-off existing floor slab, and repeating this process to peel off the plurality of existing floor slabs; and a rail section installation step of installing a rail section extending in the first direction, wherein in the peeling step, the plurality of existing floor slabs are peeled off using a floor slab peeling device that is movable along the rail section and peels the existing floor slabs from the fixed surface.

[0007] In this method of removing deck slabs, the deck slab stripping device is movable along a rail section that extends in the first direction where multiple existing deck slabs are adjacent to each other. The deck slab stripping device is moved along the rail section, and at a predetermined position, one existing deck slab is stripped off by the deck slab stripping device. Then, the deck slab stripping device is moved along the rail section again, and the adjacent existing deck slab is stripped off by the deck slab stripping device. By repeating this process, the existing deck slabs can be stripped one after another, thus enabling efficient deck slab replacement work, including stripping.

[0008] Furthermore, in the method for removing a deck slab according to the present invention, the deck slab peeling device may be detachably provided on a deck slab support portion capable of supporting the existing deck slab.

[0009] In this method of removing a deck slab, the deck slab removal device can be attached to a deck slab support section capable of supporting the existing deck slab, and the removal work can be performed. By removing the deck slab removal device from the deck slab support section, the support section can be used to support the existing deck slab, thus increasing the convenience of the device.

[0010] Furthermore, in the method for removing a deck slab according to the present invention, the deck slab support portion may be a gripping device capable of gripping the existing deck slab.

[0011] In this method of removing deck slabs, a deck slab removal device is attached to a gripping device capable of gripping the existing deck slab, allowing for efficient deck slab replacement work.

[0012] Furthermore, the method for removing a deck slab according to the present invention may include a step of temporarily placing the deck slab removal device on one end side in the first direction after the completion of the peeling step.

[0013] In this method of removing a deck slab, after the peeling process is completed, the deck slab peeling device is temporarily placed on one end in the first direction. This allows the existing deck slab to be gripped and removed using the gripping device from which the deck slab peeling device has been removed.

[0014] Furthermore, the method for removing a deck slab according to the present invention may include a removal step of removing a plurality of existing deck slabs by repeatedly gripping an existing deck slab located at one end in the first direction with the gripping device and transporting it to the other side in the first direction, then gripping an existing deck slab adjacent to the removed existing deck slab with the gripping device and transporting it to the other side in the first direction, and so on.

[0015] In this method of removing deck slabs, an existing deck slab located at one end in the first direction is grasped by a gripping device and transported to the other end in the first direction. Next, the existing deck slab adjacent to the removed deck slab is grasped by the gripping device and transported to the other end in the first direction. By repeating this process, the removal of all existing deck slabs can be completed quickly, and the deck slab replacement work can be carried out efficiently. [Effects of the Invention]

[0016] According to the method for removing deck slabs of the present invention, deck slab replacement work can be carried out efficiently. [Brief explanation of the drawing]

[0017] [Figure 1] This is a perspective view showing an apparatus used in a method for removing a deck slab according to one embodiment of the present invention. [Figure 2] This is a side view showing the apparatus used in a method for removing a deck slab according to one embodiment of the present invention. [Figure 3]It is a perspective view showing a floor slab peeling device used in a method for removing a floor slab according to an embodiment of the present invention. [Figure 4] It is a diagram for explaining a method for removing a floor slab. [Figure 5] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 4. [Figure 6] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 5. [Figure 7] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 6. [Figure 8] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 7. [Figure 9] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 8. [Figure 10] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 9. [Figure 11] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 10. [Figure 12] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 11. [Figure 13] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 12. [Figure 14] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 13. [Figure 15] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 14. <X [Figure 16] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 15. [Figure 17] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 16. [Figure 18] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 17. [Figure 19] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 18. [Figure 20] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 19. [Figure 21] It is a diagram for explaining a method for removing a floor slab, showing the subsequent process of FIG. 20. [Figure 22] This is a diagram illustrating the method for erecting the bridge deck. [Figure 23] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 22. [Figure 24] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 23. [Figure 25] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 24. [Figure 26] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 25. [Figure 27] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 26. [Figure 28] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 27. [Figure 29] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 28. [Figure 30] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 29. [Figure 31] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 30. [Figure 32] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 31. [Figure 33] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 32. [Figure 34] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 33. [Figure 35] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 34. [Figure 36] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 35. [Figure 37] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 36. [Figure 38] This diagram illustrates the method for erecting the bridge deck, and shows the subsequent steps after Figure 37. [Figure 39] This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 38. [Figure 40]This diagram illustrates the method for erecting the bridge deck, showing the subsequent steps after Figure 39. [Modes for carrying out the invention]

[0018] (Slab removal and erection equipment) The following describes a deck slab removal and erection device according to an embodiment of the present invention with reference to the drawings. Figure 1 is a perspective view showing a deck slab removal and erection device according to one embodiment of the present invention. Figure 2 is a side view showing a deck slab removal and erection device according to one embodiment of the present invention. The deck slab removal and erection device 100 according to this embodiment is used, for example, during renewal work to replace deck slabs installed on roads. An example will be given to the half-section construction, in which renewal work is performed on one lane at a time in a road with multiple lanes on one side. As shown in Figures 1 and 2, the deck slab removal and erection device 100 comprises a lower support 1, a rail section 2, and a main body section 3A. The main body section 3A comprises a running section 4A, a gripping device (deck slab support section) 6, and a deck slab peeling device 7. The running section 4A comprises an upper support 3, a guide swing section 4, and a rotating support section 5 (see Figure 2). The deck slab removal and erection device 100 corresponds to the deck slab removal device and deck slab erection device in the claims.

[0019] In the following description, the direction in which multiple existing deck slabs 201 are arranged adjacent to each other is defined as the bridge axis direction X. The direction perpendicular to the bridge axis Y is defined as the direction perpendicular to the bridge axis, perpendicular to the longitudinal direction and along the substantially horizontal direction. The direction perpendicular to the bridge axis direction X and the direction perpendicular to the bridge axis Y is defined as the vertical direction Z. One side of the bridge axis direction X may be referred to as the rear X1, and the other side as the front X2. The bridge axis direction X corresponds to the first direction in the claims.

[0020] As shown in Figure 1, the lower support 1 includes a rear support 11, a front support 12, a plurality of wheels 13, 14, a drive unit 15, and an outrigger 16.

[0021] The rear support 11 and the front support 12 are structural elements. The rear support 11 and the front support 12 are made of materials such as steel. The rear support 11 is located at the rear X1 on one side of the bridge axis direction X, on the side of the deck slab to be replaced. The front support 12 is located at the front X2 on the other side of the bridge axis direction X. The materials constituting the rear support 11 and the front support 12 can be set as appropriate.

[0022] The rear support 11 has a pair of rear support parts 11a and a rear connecting part 11b. The pair of rear support parts 11a are spaced apart in the direction Y perpendicular to the bridge axis. The rear support parts 11a extend in the vertical direction Z. The rear connecting part 11b connects the upper parts of the pair of rear support parts 11a.

[0023] The front support 12 has a pair of front support sections 12a and a front connecting section 12b. The pair of front support sections 12a are spaced apart in the direction Y perpendicular to the bridge axis. The front connecting section 12b connects the upper parts of the pair of front support sections 12a. A space S1 extending in the direction X along the bridge axis is formed between the pair of front support sections 12a. The cargo bed 102 of the transport vehicle 101 (see Figure 21) and the cargo bed 112 of the loading vehicle 111 (see Figure 27), which will be described later, can be inserted into the space S1.

[0024] As shown in Figure 2, multiple wheels 13 are provided on the front support portion 12a, spaced apart in the bridge axis direction X. The wheels 13 are rotatable around the axial direction with the direction perpendicular to the bridge axis Y as the axial direction, and are capable of traveling in the bridge axis direction X.

[0025] The wheels 14 are provided on the rear support 11a (see Figure 1) and the front support 12a. The wheels 14 are rotatable around the axial direction with the bridge axis direction X as the axial direction, and are capable of traveling in the direction Y perpendicular to the bridge axis.

[0026] The drive unit 15 drives the wheels 13. The drive unit 15 can be, for example, a hydraulic motor or an electric motor. The configuration of the drive unit 15 can be set as appropriate, as long as it drives the wheels 13. The drive unit 15 may be configured to be operated from a control panel at any location, or it may be configured to be remotely operated from a handheld control box.

[0027] As shown in Figure 1, the outrigger 16 is provided on the rear support portion 11a. As shown in Figure 2, the outrigger 16 is provided on the front support portion 12a, spaced apart in the bridge axis direction X. The outrigger 16 is a known configuration. The outrigger 16 can stabilize the posture of the lower support 1. The posture of the lower support 1 can also be adjusted to match the inclination of the installation surfaces G2, G3 (see Figure 5) on which the outrigger 16 is installed.

[0028] The rail section 2 has a pair of rail members 21. The pair of rail members 21 are spaced apart in the direction Y perpendicular to the bridge axis. The rail members 21 extend in the direction X in the bridge axis direction. The rear part of the rail member 21 is supported by the rear support part 11a. The front part of the rail member 21 is supported by the front support part 12a.

[0029] As shown in Figure 2, the upper support 3 has four upper legs 31, running wheels 32, an upper support beam 33, a lower connecting leg 34, a rear connecting part 36, a central connecting part 37, a first front connecting part 38, and a second front connecting part 39.

[0030] The four upper legs 31 extend in the vertical direction Z. The four upper legs 31 are spaced apart in the bridge axis direction X and in the direction perpendicular to the bridge axis Y.

[0031] The running wheels 32 are provided at two locations on the lower end of each upper leg portion 31. The running wheels 32 are capable of rotating around the axial direction, with the direction Y perpendicular to the bridge axis as the axial direction. The running wheels 32 are capable of traveling along the upper part of the rail material 21 in the bridge axis direction X.

[0032] The upper support beam 33 connects the upper parts of two upper legs 31 that are spaced apart in the bridge axis direction X. The upper support beam 33 has a support beam projection 33a that protrudes forward X2 from the upper legs 31.

[0033] The support beam projection 33a is provided with a pivoting pin receiving portion 33b. The pivoting pin receiving portion 33b is positioned in the bridge axis direction X between the pair of outriggers 16 of the front support portion 12a.

[0034] The lower connecting leg portion 34 connects the lower parts of the two upper leg portions 31, which are spaced apart in the bridge axis direction X.

[0035] The rear connecting section 36 connects the rear ends of two upper support beams 33 that are spaced apart in the direction Y perpendicular to the bridge axis. The central connecting section 37 connects the centers of the two upper support beams 33 that are spaced apart in the direction Y perpendicular to the bridge axis in the direction X perpendicular to the bridge axis. The first front connecting section 38 connects the front ends of two upper support beams 33 that are spaced apart in the direction Y perpendicular to the bridge axis. The second front connecting section 39 connects the lower ends of the front ends of two upper support beams 33 that are spaced apart in the direction Y perpendicular to the bridge axis. The second front connecting section 39 is provided with guide support sections 39a that protrude upward. A pair of guide support sections 39a are provided, spaced apart in the direction Y perpendicular to the bridge axis.

[0036] The guide swinging section 4 includes a guide section 40, a balance weight 43, and an arm member 45. The guide section 40 has a pair of guide rails 41.

[0037] A pair of guide rails 41 are spaced apart in the direction Y perpendicular to the bridge axis. The guide rails 41 extend in the direction X in the bridge axis direction. The guide rails 41 are supported by a central connecting portion 37 and a guide support portion 39a.

[0038] The balance weight 43 is configured as a rectangular plate in plan view. Wheels 43a are provided at both ends of the balance weight 43 in the direction Y perpendicular to the bridge axis, and at both ends in the direction X perpendicular to the bridge axis. The wheels 43a are rotatable around the axis with the direction Y perpendicular to the bridge axis as the axis direction. The wheels 43a are movable along the upper surface of the guide rail 41 in the direction X perpendicular to the bridge axis.

[0039] The arm member 45 includes a pair of arm support parts 46, a pair of arm swing jacks 47, and a swing arm 48.

[0040] A pair of arm support sections 46 are spaced apart in the direction Y perpendicular to the bridge axis. Each arm support section 46 has a pair of link arms 46a and 46b. The pair of link arms 46a and 46b are connected via a connecting pin 46c so as to be rotatable around the axis with the direction Y perpendicular to the bridge axis as the axis direction. One end of the link arm 46a is connected via a connecting pin 46d to an arm receiving section 43b provided on the balance weight 43 so as to be rotatable around the axis with the direction Y perpendicular to the bridge axis as the axis direction. The arm support section 46 is swingable relative to the balance weight 43.

[0041] A pair of swing arm jacks 47 are spaced apart in the direction Y perpendicular to the bridge axis. The swing arm jacks 47 are connected via connecting pins 47a to the swing pin receiving portion 33b so as to be rotatable around the axis with the direction Y perpendicular to the bridge axis as the axis direction. The swing arm jacks 47 are extendable in the longitudinal direction.

[0042] The swing arm 48 is fixed to the link arm 46b. The swing arm 48 is provided with a connecting portion 48a. The connecting portion 48a is connected via a connecting pin 48b to the arm swing jack 47 so as to be rotatable around the axial direction, with the direction Y perpendicular to the bridge axis as the axial direction. The swing arm 48 is swingable relative to the upper support 3 and the balance weight 43. A retractable arm 50 (see Figure 19), which is configured to be retractable, is connected to the tip of the swing arm 48.

[0043] The rotating support part 5 is fixed to the tip of the telescopic arm 50 of the swinging arm 48. The rotating support part 5 supports the gripping device 6 so that it can rotate around the axial direction, with the vertical direction Z as the axial direction, in the state shown in Figure 2. The rotating support part 5 may also be a pin-connected configuration, and the configuration can be set as appropriate.

[0044] The gripping device 6 is capable of gripping both the existing deck slab 201 and the new deck slab 202. The gripping device 6 is connected to the telescopic arm 50 of the swing arm 48 via the rotating support part 5. In the state shown in Figure 2, the gripping device 6 is connected to the telescopic arm 50 so as to be rotatable around the axial direction, with the vertical direction Z as the axial direction. The gripping device 6 is constructed, for example, by assembling steel frames in a grid pattern. The outer edge shape of the gripping device 6 is approximately rectangular in plan view. The length of the short side of the gripping device 6 is shorter than the length in the direction Y perpendicular to the bridge axis between the pair of front support parts 12a. This allows the gripping device 6 to be placed in space S1. The configuration and materials of the gripping device 6 can be set as appropriate. The gripping device 6 can grip the deck slab by being connected to bolts inserted through bolt holes formed in the thickness direction of the deck slab. Furthermore, the configuration by which the gripping device 6 grips the floor slab is not limited to bolts; it can be configured as appropriate, such as by using hooks for fastening.

[0045] The deck slab peeling device 7 is detachably mounted on the gripping device 6. The deck slab peeling device 7 can peel the existing deck slab 201 from the fixed surface G1 (see Figure 4).

[0046] Figure 3 is a perspective view showing the deck slab removal device 7. As shown in Figure 3, the slab peeling device 7 has four legs 71 and a peeling structure 72. The legs 71 and the peeling structure 72 are made of, for example, steel. The materials constituting the legs 71 and the peeling structure 72 can be set as appropriate. The number of legs 71 can also be set as appropriate.

[0047] The four legs 71 are installed on the installation surfaces G4 and G5 (see Figure 10). The peeling structure 72 is supported by the four legs 71. The outer edge shape of the peeling structure 72 is approximately rectangular in plan view. The length of the short side of the peeling structure 72 is shorter than the length Y perpendicular to the bridge axis between the pair of front support parts 12a. This allows the deck peeling device 7 to be placed in space S1. The legs 71 are provided near the four corners of the approximately rectangular shape in plan view. The shape of the peeling structure 72 can be set as appropriate.

[0048] The peeling structure 72 has locking portions 73. There are four locking portions 73. The number of locking portions 73 can be set as appropriate.

[0049] The locking portion 73 is locked to the existing floor slab. The locking portion 73 includes a tension bar 74, a fastening portion 75, and a jack 78.

[0050] The tension bar 74 is formed in a rod shape. The tension bar 74 extends in the vertical direction Z. The tension bar 74 is inserted through a through hole that penetrates the existing floor slab in the thickness direction. A support plate 76 is inserted through the tension bar 74. The support plate 76 is positioned on the underside of the existing floor slab.

[0051] The fastening portion 75 is fastened to the tension bar 74 on the underside of the existing floor slab. With the existing floor slab sandwiched between the delamination structure 72 and the support plate 76, the fastening portion 75 is fastened to the tension bar 74, thereby fixing the position of the existing floor slab relative to the delamination structure 72. For example, the tension bar 74 is a bolt and the fastening portion 75 is a nut.

[0052] The jack 78 is located on top of the tension bar 74. The jack 78 is positioned above the delamination structure 72. The jack 78 can pull the tension bar 74 upward. This pulls the existing floor slab through which the tension bar 74 is inserted upward.

[0053] (Method for removing and installing deck slabs) Next, we will explain the method for removing and installing the bridge deck.

[0054] [Method for removing the deck slab] First, let me explain how to remove the deck slab. As shown in Figure 4, the existing deck slabs 201 are arranged adjacent to each other in the bridge axis direction X. The existing deck slabs 201 are installed on the upper side of the girder. The existing deck slabs 201 are fixed to a fixed surface G1. The fixed surface G1 is, for example, the upper surface of the girder. In the illustrated example, five existing deck slabs 201 are labeled, but although existing deck slabs 201 are also installed on the lower side of the deck slab removal and erection device 100, this is only shown schematically.

[0055] (Movement process of floor slab removal and erection equipment) When removing five existing deck slabs 201 in succession, the rear support 11 of the deck slab removal and erection device 100 is installed behind X1 of the existing deck slab 201 to be removed, and the front support 12 is installed in front X2 of the existing deck slab 201 to be removed. Although adjacent existing deck slabs 201 are joined together, the joints of adjacent existing deck slabs 201 are cut in advance. Note that the number of existing deck slabs 201 to be removed at one time is not limited to five, and the number can be set as appropriate. The number of existing deck slabs 201 to be removed at one time should be two or more, and the number can be determined according to the length of the rail section 2, etc.

[0056] (Outrigger installation process, rail installation process) As shown in Figure 5, the outriggers 16 are installed on the installation surfaces G2 and G3 to support the slab removal and erection device 100. In the illustrated example, the installation surface G2 on which the outriggers 16 of the rear support 11 are installed is the upper surface of the newly installed slab 202 that has already been replaced. The installation surface G3 on which the outriggers 16 of the front support 12 are installed is the upper surface of the existing slab 201 that will be removed in the next stage. Once the slab removal and erection device 100 is installed on the installation surfaces G2 and G3, the rail section 2 is set to a predetermined height.

[0057] (Vertical oscillation process of the oscillating arm) As shown in Figure 6, the swinging arm 48 is swung so that it points vertically downward in preparation for the removal of the first existing floor slab 201.

[0058] (Main body movement process) As shown in Figure 7, the running wheels 32 of the main body 3A are moved rearward X1 along the rail material 21. The rotating support unit 5 moves the main body 3A to a position where there is enough space for both the gripping device 6 and the slab removal device 7 attached to the gripping device 6 to rotate 90 degrees horizontally.

[0059] (Gripping device rotation process) As shown in Figure 8, the rotating support section 5 rotates both the gripping device 6 and the deck slab removal device 7 attached to the gripping device 6 by 90 degrees horizontally. This causes the longer sides of the gripping device 6 and the deck slab removal device 7 to face in the direction Y, which is perpendicular to the bridge axis.

[0060] (Main body movement process) As shown in Figure 9, the running wheels 32 of the main body 3A are moved backward X1 along the rail material 21. The main body 3A is moved to a position where the deck slab removal device 7 is positioned above the first existing deck slab 201 to be removed.

[0061] (Preparation process for peeling) As shown in Figure 10, a tension bar 74 is inserted into a through hole formed in the existing floor slab 201 in the vertical Z direction. A fastening part 75 is fastened to the lower end of the tension bar 74, and the existing floor slab 201 is sandwiched between the delamination structure 72 (see Figure 3) and the support plate 76 (see Figure 3). The legs 71 are installed on the installation surfaces G4 and G5. For example, installation surface G4 is the upper surface of the second existing floor slab 201. Installation surface G5 is the upper surface of the reaction platform 91 installed on the fixed surface G1.

[0062] (Existing deck slab lifting process) As shown in Figure 11, the jack 78 of the slab removal device 7 is used to lift the existing slab 201 and separate it from the fixed surface G1. The existing slab 201 only needs to be lifted by, for example, about 200 mm. After separating the existing slab 201 from the fixed surface G1, the existing slab 201 is lowered once and returned to the upper side of the fixed surface G1.

[0063] (Returning the existing deck slab) As shown in Figure 12, loosen the fastening part 75 from the tension bar 74 and remove the fastening part 75 and support plate 76 from the tension bar 74. Pull the tension bar 74 out from the detached existing floor slab 201 and place the existing floor slab 201 back in its original position above the fixed surface G1. Remove the reaction force platform 91. The fastening part 75 and support plate 76 will be used for the detachment work of the second and subsequent existing floor slabs 201.

[0064] (Repeated process of removing existing deck slabs) As shown in Figure 13, the process from moving the main body to returning the existing floor slabs 201 is carried out for each of the second to fifth existing floor slabs 201. This separates the second to fifth existing floor slabs 201 from the fixed surface G1.

[0065] (Gripping device rotation process) As shown in Figure 14, after the first to fifth existing deck slabs 201 are detached from the fixed surface G1, the running wheels 32 of the main body 3A are moved along the rail material 21 to move the main body 3A to a position where there is enough space for both the gripping device 6 and the deck slab detachment device 7 attached to the gripping device 6 to rotate 90 degrees horizontally. At the rotating support section 5, both the gripping device 6 and the deck slab detachment device 7 are rotated 90 degrees horizontally.

[0066] (Temporary placement of deck slab removal equipment) As shown in Figure 15, when temporarily placing the slab peeling device 7 on the new slab 202 side, the running wheels 32 of the main body 3A are moved along the rail material 21 to move both the gripping device 6 and the slab peeling device 7 to the rear X1.

[0067] As shown in Figure 16, the main body 3A is moved to the rearmost position. The gripping device 6 and the deck slab removal device 7 are positioned above the newly installed deck slab 202.

[0068] As shown in Figure 17, the deck slab peeling device 7 is partially detached from the gripping device 6. For example, the gripping device 6 is made slidable in the bridge axis direction X relative to the deck slab peeling device 7. The deck slab peeling device 7 is hoisted onto the chain block 49 provided on the main body 3A, and the lower end of the swing arm 48 supporting the gripping device 6 is tilted forward X2. As a result, the gripping device 6 is positioned X2 in front of the deck slab peeling device 7.

[0069] As shown in Figure 18, the gripping device 6 is supported by the swinging arm 48, and the slab peeling device 7 is lifted together by rigging it with a chain block 49, so that the slab peeling device 7 is positioned X1 behind the existing slab 201 to be removed. In the illustrated example, it is positioned above the newly installed slab 202 that has already been replaced. The slab peeling device 7 is completely removed from the gripping device 6 and temporarily placed in position.

[0070] (Existing floor slab gripping process) As shown in Figure 19, the gripping device 6 is rotated 90 degrees horizontally at the rotating support unit 5 so that the long side of the gripping device 6 faces in the direction Y perpendicular to the bridge axis. The first existing deck slab 201 is then gripped with the gripping device 6.

[0071] (Gripping device rotation process) As shown in Figure 20, the gripping device 6 is rotated 90 degrees horizontally at the rotating support section 5 so that the long side of the existing deck slab 201 faces the bridge axis direction X.

[0072] (Existing deck slab lifting process) As shown in Figure 21, the lower end of the swing arm 48 is lifted upward to hoist up the existing deck slab 201. The loading platform 102 of the transport vehicle 101 is moved into the space S1 of the front support parts 12a on both sides of the deck slab removal and erection device 100 in the direction Y perpendicular to the bridge axis.

[0073] (Existing floor slab loading process) As shown in Figure 22, the main body 3A is moved forward X2 to a position where the existing floor slab 201 is positioned above the loading platform 102 of the transport vehicle 101. The existing floor slab 201 is loaded onto the loading platform 102. The transport vehicle 101 is then moved out, the existing floor slab 201 is lowered from the loading platform 102, and the existing floor slab 201 is placed in the designated position.

[0074] (Repeated process of removing existing deck slabs) For the second to fifth existing deck slabs 201, the process from gripping the existing deck slab to loading the existing deck slab is carried out for each. The second to fifth existing deck slabs 201 are removed and placed in their designated positions.

[0075] The process from the movement of the deck slab removal and erection device described above to the repeated process of peeling off the existing deck slab corresponds to the peeling process in the claims. The process from the gripping of the existing deck slab described above to the repeated process of removing the existing deck slab corresponds to the removal process in the claims.

[0076] [Method for erecting deck slabs] Next, we will explain the method for erecting the bridge deck. The new deck slab 202 is then erected in a continuous manner in the area where the existing deck slab 201 was removed as described above.

[0077] (Main body movement process) As shown in Figure 23, the wheels 32 of the main body 3A are moved forward X2 along the rail material 21. The main body 3A is moved to a position where the newly installed floor slab 202, which is placed on the loading platform 112 of the loaded vehicle 111, can be unloaded. The swing arm 48 is raised to its maximum lifting height.

[0078] (Vehicle approach process) As shown in Figure 24, the loading platform 112 of the loading vehicle 111 is moved into the space S1 between the front support parts 12a on both sides of the bridge deck removal and erection device 100 in the direction Y perpendicular to the bridge axis. The new deck slabs 202 are placed on the loading platform 112. Multiple new deck slabs 202 may be placed on the loading platform 112.

[0079] (New floor slab gripping process) As shown in Figure 25, the swinging arm 48 swings downward to grip the first newly installed floor slab 202 with the gripping device 6.

[0080] (New deck slab lifting process) As shown in Figure 26, the lower end of the swing arm 48 is lifted upward to hoist up the new floor slab 202. The loaded vehicle 111 is temporarily moved out of the way.

[0081] (New floor slab lowering process) As shown in Figure 27, the swinging arm 48 is lowered vertically downward and positioned at a height below the rail section 2.

[0082] (Main body movement process) As shown in Figure 28, the main body 3A is moved rearward X1 along the rail material 21. The main body 3A is moved to a position where there is enough space to rotate the newly installed deck slab 202, which is gripped by the gripping device 6, 90 degrees horizontally.

[0083] (Gripping device rotation process) As shown in Figure 29, the gripping device 6 and the newly installed deck slab 202 gripped by the gripping device 6 are rotated 90 degrees horizontally.

[0084] (Main body movement process) As shown in Figure 30, the main body 3A is moved backward X1 along the rail material 21. The main body 3A is moved to the position where the first new deck slab 202 will be installed.

[0085] (New floor slab erection process) As shown in Figure 31, the telescopic arm 50 of the swing arm 48 is extended to erect the new deck slab 202 in the predetermined position.

[0086] (Extendable arm retraction process) As shown in Figure 32, the gripping device 6 is removed from the newly installed floor slab 202 and the telescopic arm 50 is retracted. If the gripping device 6 is eccentric, slide it around its center.

[0087] (Main body movement process) As shown in Figure 33, the main body 3A is moved forward X2 along the rail material 21. The main body 3A is moved to a position where there is enough space for the gripping device 6 to rotate 90 degrees horizontally.

[0088] (Gripping device rotation process) As shown in Figure 34, the gripping device 6 is rotated 90 degrees horizontally.

[0089] (Main body movement process) As shown in Figure 35, the main body 3A is moved forward X2 along the rail material 21.

[0090] (Oscillating arm raising process) As shown in Figure 36, the main body 3A is moved to a position where the newly installed floor slab 202, which is placed on the loading platform 112 of the loading vehicle 111, can be unloaded. The swing arm 48 is raised to its maximum lifting height.

[0091] (Vehicle approach process) As shown in Figure 37, the loading platform 112 of the loading vehicle 111 is moved into the space S1 between the front support sections 12a on both sides of the deck slab removal and erection device 100 in the direction Y perpendicular to the bridge axis. The second new deck slab 202 is placed on the loading platform 102.

[0092] (Repeated process of erecting new deck slabs) For the second to fourth newly constructed deck slabs 202, the process from gripping the new deck slab to the vehicle entry process is performed. For the fifth newly constructed deck slab 202, the process from gripping the new deck slab to moving the main body just before the swing arm raising process is performed. For the second to fifth newly constructed deck slabs 202, the new deck slabs 202 are erected.

[0093] The process from the main body movement process shown in Figure 23 above to the repeated process of erecting the new deck slab corresponds to the installation process described in the claims.

[0094] [Installation method for deck slab removal device] Next, we will explain how to install the temporarily placed deck slab peeling device 7 into the gripping device 6.

[0095] As shown in Figure 38, the main body 3A is moved backward X1 along the rail material 21. The main body 3A is moved to a position where the gripping device 6 is positioned above the deck slab peeling device 7.

[0096] As shown in Figure 39, the deck slab peeling device 7 is hoisted onto the chain block 49 provided on the main body 3A. The gripping device 6 is supported by the swing arm 48, and the deck slab peeling device 7 is hoisted onto the chain block 49 to perform a joint lift.

[0097] As shown in Figure 40, the tip of the swinging arm 48 is swung so that it faces rearward X1, and the slab removal device 7 is installed on the gripping device 6. With the slab removal device 7 attached to the gripping device 6, the main body 3A can be moved forward X2 to perform the removal work of the existing slab 201 as shown in Figure 4.

[0098] Once the replacement work on the first to fifth deck slabs is completed, the outriggers 16 are raised and the wheels 13 of the deck slab removal and erection device 100 are placed on the installation surfaces G2 and G3. The device moves forward X2 using the wheels 13 and performs the replacement work on the sixth and subsequent deck slabs in the same manner at the work site in X2. After the replacement work on all deck slabs aligned in the bridge axis direction X is completed, a rail (not shown) extending in the direction Y perpendicular to the bridge axis is installed below the wheels 14 of the deck slab removal and erection device 100. The outriggers 16 are raised and the wheels 14 of the deck slab removal and erection device 100 are placed on the rail. The wheels 14 are moved along the rail in the direction Y perpendicular to the bridge axis and the replacement work on the adjacent deck slab is performed in the same manner. Alternatively, the wheels 14 of the deck slab removal and erection device 100 may be configured to move on their own along the installation surfaces G2 and G3 without the rail.

[0099] In this method of removing and erecting a bridge deck, the bridge deck removal and erection device 100's bridge deck stripping device 7 is movable along rail sections 2 that extend in the bridge axis direction X, where multiple existing bridge decks 201 are adjacent. The bridge deck stripping device 7 is moved along the rail section 2, and at a predetermined position, the bridge deck stripping device 7 strips off one existing bridge deck 201. Then, the bridge deck stripping device 7 is moved along the rail section 2 again, and the bridge deck stripping device 7 strips off the adjacent existing bridge deck 201. By repeating this process, the existing bridge decks 201 can be stripped off sequentially, thus enabling efficient bridge deck replacement work, including stripping.

[0100] Furthermore, the deck slab peeling device 7 can be attached to the gripping device 6, which is capable of gripping the deck slabs 201 and 202, to perform the peeling work. By removing the deck slab peeling device 7 from the gripping device 6, the gripping device 6 can be used to grip the deck slabs 201 and 202, thereby increasing the convenience of the device.

[0101] Furthermore, after the peeling process is completed, the deck peeling device 7 is temporarily placed at the rear X1 in the bridge axis direction X. This allows the existing deck slab 201 to be gripped and removed using the gripping device 6 from which the deck peeling device 7 has been removed.

[0102] Furthermore, after the installation process is completed, the gripping device 6 is moved to the rear X1 in the bridge axis direction X along the rail section 2. The temporarily placed deck slab peeling device 7 is then attached to the gripping device 6, and the deck slab peeling device 7 can be used for peeling the existing deck slab 201 in the next work area.

[0103] Furthermore, the existing deck slab 201 located at the rear X1 in the bridge axis direction X is grasped by the gripping device 6 and transported to the front X2 in the bridge axis direction X. Next, the existing deck slab 201 adjacent to the removed existing deck slab 201 is grasped by the gripping device 6 and transported to the other side in the bridge axis direction X. By repeating this process, the removal of all existing deck slabs 201 can be carried out quickly, and the replacement work of deck slabs 201 and 202 can be carried out efficiently.

[0104] Furthermore, the gripping device 6 is movable along the rail section 2 that extends in the bridge axis direction X where multiple new deck slabs 202 are adjacent. The gripping device 6 is moved along the rail section 2, and at a predetermined position, the gripping device 6 installs one new deck slab 202 onto the fixed surface G1. Then, the gripping device 6 is moved along the rail section 2 again, and the gripping device 6 installs a new deck slab 202 next to a new deck slab 202 that has already been installed. By repeating this process, the installation work for all new deck slabs 202 can be completed quickly, and the replacement work for deck slabs 201 and 202 can be carried out efficiently.

[0105] It should be noted that the shapes and combinations of the constituent members shown in the above-described embodiments are merely examples, and can be modified in various ways based on design requirements, etc., without departing from the spirit of the present invention.

[0106] For example, the embodiment described above illustrates the use of the deck removal and erection device 100 in the replacement work of a road deck, but it is not limited to this. The deck removal and erection device 100 can also be used in the replacement work of a road deck, etc.

[0107] Furthermore, in the embodiments described above, a gripping device 6 capable of gripping the deck slab was used as an example of a deck slab support, but the invention is not limited to this. The deck slab support can be any device capable of supporting the deck slab. For example, a deck slab peeling device 7 may be detachably provided on a deck slab support that is equipped with a crane system or the like as a lifting means and capable of supporting the deck slab.

[0108] Furthermore, although the above-described embodiment illustrates an example of performing deck slab replacement work on adjacent deck slabs in the bridge axis direction X using the deck slab removal and erection device 100, it is not limited to this. The first direction may be the direction perpendicular to the bridge axis Y, and the second direction may be the bridge axis direction X, and the deck slab replacement work on adjacent deck slabs in the direction perpendicular to the bridge axis Y may be performed.

[0109] Furthermore, the rail section 2 has a pair of rail materials 21, but is not limited to this. The rail material 21 may be one or three or more.

[0110] Furthermore, the locking portion 73 of the deck slab removal device 7 includes a tension bar 74 and a jack 78, but is not limited to this. The configuration of the locking portion 73 can be set as appropriate, as long as it can be locked to the deck slab.

[0111] Furthermore, the deck slab removal and erection device 100 has a rotating support section 5, but is not limited to this. The deck slab removal and erection device 100 does not need to have a rotating support section 5.

[0112] Furthermore, the cargo bed 102 of the transport vehicle 101 and the cargo bed 112 of the loading vehicle 111 are designed to enter the space S1 of the front support parts 12a on both sides of the deck slab removal and erection device 100 in the direction Y perpendicular to the bridge axis, but this is not limited to this. The cargo bed 102 of the transport vehicle 101 and the cargo bed 112 of the loading vehicle 111 may be placed adjacent to or near the deck slab removal and erection device 100 in the direction Y perpendicular to the bridge axis, and the existing deck slab 201 gripped by the gripping device 6 may be transferred there.

[0113] Furthermore, although the deck slab peeling device 7 is temporarily placed on the newly installed deck slab 202 side, this is not the only option. The location for temporarily placing the deck slab peeling device 7 can be set as appropriate.

[0114] Furthermore, while the slab peeling device 7 is configured to be detachably attached to the gripping device 6, it is not limited to this configuration. The slab peeling device 7 may be configured to be used independently of the gripping device 6, without being attached to the gripping device 6. For example, there may be a slab removal device separate from the slab removal and erection device 100 described above, in which the slab peeling device 7 is directly attached to the rotating support unit 5, rather than being attached to the rotating support unit 5 via the gripping device 6.

[0115] Furthermore, in the embodiment described above, the deck slab peeling device 7 is rigged with a chain block 49 provided on the main body 3A, but this is not the only configuration. If the swing arm 48 has sufficient stroke, the swing arm 48 may extend to the position where the deck slab peeling device 7 is temporarily placed without using the chain block 49, and the tip of the swing arm 48 may support the deck slab peeling device 7.

[0116] Furthermore, although the above-described embodiment uses a half-section construction method, where the renovation work is carried out on one lane at a time out of multiple lanes on one side, as an example, it is not limited to this. It can also be applied to full-section construction, where the renovation work is carried out on multiple lanes on one side at once.

[0117] The Sustainable Development Goals (SDGs) are 17 international goals adopted at the UN Summit in September 2015. The deck slab removal and erection device 100 according to this embodiment can contribute to achieving some of the 17 SDGs, such as goal 11, "Make cities and human settlements inclusive, safe, resilient and sustainable." [Explanation of symbols]

[0118] 2 Rail section 3. Main body 3A Main body 4A Running section 5. Rotating support section 6 Gripping device 7. Deck slab removal device (deck slab support section) 21 Rail material 71 Legs 72 Delamination Structure 73 Locking part 74 Tension Bar 78 Jack 100 Floor slab removal and erection equipment 201 Existing slab 202 Newly constructed deck G1 fixed surface G2,G3,G4,G5 Installation surface X Bridge axis direction (first direction) Y Direction perpendicular to bridge axis Z vertical direction

Claims

1. A peeling step in which, of a plurality of existing floor slabs installed on a fixed surface and arranged adjacent to each other in a first direction, the existing floor slab located at one end in the first direction is peeled from the fixed surface, and then the existing floor slab adjacent to the peeled existing floor slab is peeled, and this process is repeated to peel off the plurality of existing floor slabs, The process includes a rail section installation step of installing the rail section extending in the first direction, A method for removing floor slabs, wherein the peeling step involves using a floor slab peeling device that is movable along the rail section and peels the existing floor slabs from the fixed surface, thereby peeling off the plurality of existing floor slabs.

2. The method for removing a slab according to claim 1, wherein the slab removal device is detachably provided on a slab support portion capable of supporting the existing slab.

3. The method for removing a floor slab according to claim 2, wherein the floor slab support is a gripping device capable of gripping the existing floor slab.

4. The method for removing a slab according to claim 2 or 3, further comprising a step of temporarily placing the slab removal device on one end side in the first direction after the completion of the peeling step.

5. A method for removing a floor slab according to claim 3, comprising a removal step of removing a plurality of existing floor slabs by repeatedly gripping the existing floor slab located at one end in the first direction with the gripping device and transporting it to the other side in the first direction, then gripping the existing floor slab adjacent to the removed existing floor slab with the gripping device and transporting it to the other side in the first direction, and so on.

Images