Structure exchange device and structure exchange method

Abstract

To provide a structure exchange device and a structure exchange method capable of carrying in and carrying out a structure efficiently.SOLUTION: A structure exchange device is used when removing an existing structure 10 and installing a new structure, the device integrally configuring a travelling unit 2 that moves the structure in a given direction, a support unit 3 that supports the structure, and a height adjustment unit 5 that is interposed between the traveling unit and the support unit and can adjust the height of the support unit relative to the travel unit, the support unit having a pair of support beams 31, 31 capable of being arranged on both sides of the structure, and a holding unit 32 that holds a distance between the pair of support beams.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a structure replacement device and a structure replacement method.

Background Art

[0002] Conventionally, in floor slab replacement work and seismic reinforcement work for bridges, replacement work of the support structure has been carried out. In the replacement work of the support structure, replacement work of the support body and movement work of the attached support pedestal concrete member (foundation) are carried out. In this replacement work, the work procedure is set based on the empirical rules and knowledge of skilled workers, and using lifting tools such as chain blocks and lever blocks (registered trademarks), the removal work and installation work of the heavy support body and support pedestal concrete member are carried out on the limited bridge piers under the narrow girders (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the conventional work greatly relies on the experience of skilled workers, and there are concerns about safety depending on the skill level of the workers. In addition, handling heavy objects is required in a narrow place, and the labor of many workers is required. As a result, there has been a problem that it took time for the loading and unloading work of the structure composed of the support body and the support pedestal concrete member.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a structure replacement device and a structure replacement method capable of efficiently loading and unloading a structure.

Means for Solving the Problems

[0006] To achieve the above object, a structure replacement device according to the present invention is a structure replacement device used when removing an existing structure and installing a new structure, and includes a traveling part that moves the structure in a predetermined direction, a support part that supports the structure, and a height adjustment part that is interposed between the traveling part and the support part and can adjust the height of the support part with respect to the traveling part, which are integrally configured. The support part includes a pair of support beams that can be arranged on both sides of the structure and a holding part that holds the distance between the pair of support beams.

[0007] With such a configuration, the existing structure can be replaced with a new structure only by operating the structure replacement device. That is, the loading and unloading of the structure can be efficiently performed without relying on the experience of skilled workers. In addition, by arranging a pair of support beams on both sides of the structure to be replaced and using the holding part to hold the distance between the pair of support beams, the structure can be reliably held from both sides.

[0008] Further, in the structure replacement device according to the present invention, the height adjustment part may be a jack device or a height adjustment bolt.

[0009] In this way, by configuring the height adjustment part with a jack device or a height adjustment bolt, the structure can be reliably lifted to a predetermined height with a simple structure.

[0010] A structure replacement method according to the present invention is a structure replacement method for removing an existing structure and installing a new structure using any of the above structure replacement devices. The traveling parts are arranged on both sides sandwiching the existing structure, the support part is supported and fixed to the existing structure, the height adjustment part is operated to adjust the height of the support part with respect to the traveling part, the existing structure is lifted to a predetermined height, the existing structure is removed by the traveling part, after removing the existing structure, the new structure is moved to a predetermined position using the structure replacement device, and at the predetermined position, the height adjustment part is operated to install the new structure at the predetermined position.

[0011] By configuring in this way, the existing structure can be replaced with a new structure only by operating the structure replacement device. That is, the loading and unloading of the structure can be efficiently performed without relying on the experience of skilled workers.

Effects of the Invention

[0012] According to the present invention, it is possible to provide a structure replacement device and a structure replacement method capable of efficiently loading and unloading a structure.

Brief Description of the Drawings

[0013]

Figure 1

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Figure 11

Embodiments for Carrying Out the Invention

[0014] Hereinafter, a structure replacement device and a structure replacement method according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11. In the present embodiment, a case where the structure replacement device 1 is used when replacing the seismic isolation bearing (structure) 10 installed between the pier and the floor slab of a bridge will be described.

[0015] As shown in FIGS. 1 to 5, the seismic isolation bearing 10 is attached to the upper surface 11a of a concrete foundation 11 provided on the upper surface of the pier. The seismic isolation bearing 10 includes a pair of support plates 12, 12 arranged vertically, and a seismic isolation rubber 13 disposed between the pair of support plates 12, 12. In plan view, the seismic isolation rubber 13 is smaller than the support plate 12. A step portion 14 is formed between the support plate 12 and the seismic isolation rubber 13. The step portion 14 is formed over the entire circumference of the seismic isolation rubber 13.

[0016] The structure replacement device 1 integrally includes a traveling part 2 for moving the seismic isolation bearing 10 in a predetermined direction, a support part 3 for supporting the seismic isolation bearing 10, and a height adjustment part 5 interposed between the traveling part 2 and the support part 3 and capable of adjusting the height of the support part 3 with respect to the traveling part 2.

[0017] The traveling part 2 moves the seismic isolation bearing 10 in a predetermined direction. The traveling part 2 has a plurality of traveling units 22 provided with wheels 21 and a connecting part 23 connecting the traveling units 22 to each other.

[0018] The traveling unit 22 includes a frame portion 24 formed in a substantially rectangular shape in plan view. The frame portion 24 is formed by combining steel square tubes. Wheels 21 are attached to the lower surface of the frame portion 24. Four wheels 21 are attached to the traveling unit 22. At a substantially central portion of the frame portion 24 in plan view, a connecting portion 25 to which the height adjusting portion 5 is connected is provided. The connecting portion 25 is arranged so as to span between the opposing square tubes of the frame portion 24. The connecting portion 25 is composed of the same square tubes as the frame portion 24.

[0019] The connecting portion 23 is a member that connects adjacent traveling units 22. The connecting portion 23 includes a fixing portion 26 provided on the traveling unit 22 and a connecting rod 30 attached to the fixing portion 26. The fixing portion 26 is attached to substantially four corners of the frame portion 24 of the traveling unit 22 in plan view. The fixing portion 26 has a base portion 27 fixed to the frame portion 24 and a movable portion 28 that moves relative to the base portion 27. The movable portion 28 is attached so as to rotate upward with respect to the base portion 27. The base portion 27 and the movable portion 28 can be tightened by a fastening tool 29 such as a screw to fix the connecting rod 30. The connecting rod 30 is made of, for example, a cylindrical steel material. The connecting rod 30 has a length that can span, for example, the fixing portions 26 of two traveling units 22. As shown in FIG. 1, by fixing the connecting rod 30 of the connecting portion 23 to two traveling units 22, the traveling units 22 can be connected and travel in a desired direction.

[0020] The support portion 3 includes a pair of support beams 31, 31 that can be arranged on both sides of the seismic isolation bearing 10 and a holding portion 32 that holds the distance between the pair of support beams 31, 31.

[0021] The support beam 31 is formed of, for example, a steel square tube. The support beam 31 has a length that includes (straddles) the seismic isolation bearing 10 to be carried in and out and the traveling portions 2 arranged on both sides of the seismic isolation bearing 10 in plan view. The pair of support beams 31, 31 are arranged on both the front and rear sides in the traveling direction of the structure replacement device 1.

[0022] The holding part 32 has a holding bar 33 for holding the distance between the pair of support beams 31, 31 and a fixture 34 for fixing the holding bar 33 to the support beam 31. The holding bar 33 is formed of, for example, a round bar made of steel. The holding bar 33 has a length that encompasses (straddles) the seismic isolation bearing 10 to be carried in and out and the pair of support beams 31, 31 arranged on both sides of the seismic isolation bearing 10. Although a pair of holding bars 33 are arranged on both sides in the width direction of the seismic isolation bearing 10, only one of them may be arranged.

[0023] On the side surface 31a of the support beam 31, through holes 35 through which the holding bar 33 is inserted are formed. A plurality of through holes 35 are formed along the axial direction of the support beam 31. The through holes 35 are formed at positions facing both sides in the width direction of the seismic isolation bearing 10. That is, the holding bar 33 is configured to be attachable to both sides in the width direction of the seismic isolation bearing 10.

[0024] Thread grooves (see FIGS. 3 and 5) are formed at predetermined positions on the peripheral surface of the holding bar 33. The thread grooves are formed at positions protruding from the side surface 31a of the support beam 31 when the holding bar 33 is inserted through the through hole 35 of the support beam 31. The fixture 34 is, for example, a nut. By screwing the fixture 34 into the thread groove, the holding bar 33 can be fixed to the support beam 31.

[0025] The height adjustment part 5 is interposed between the traveling part 2 and the support part 3 and is provided so as to be able to adjust the height of the support part 3 with respect to the traveling part 2. The height adjustment part 5 has an upper connection part 51 connected to the support beam 31, a jack part 52 whose upper part is connected to the upper connection part 51, and a lower connection part 53 connected to the lower part of the jack part 52 and connected to the connection part 25.

[0026] The upper connection part 51 is, for example, a steel square tube in which a through hole 54 through which the support beam 31 is inserted is formed. The size of the through hole 54 of the upper connection part 51 is formed slightly larger than the outer shape of the support beam 31. The upper connection part 51 is configured to be movable along the axial direction of the support beam 31 in a state of being externally fitted to the support beam 31.

[0027] The jack part 52 has an upper connecting part 51 connected to its upper part and a lower connecting part 53 connected to its lower part. The jack part 52 is configured to be telescopically extendable in the vertical direction. When the jack part 52 is arranged between the traveling part 2 and the support part 3 and the jack part 52 is extended, the seismic isolation bearing 10 is configured to be lifted from the concrete foundation 11.

[0028] The lower connecting part 53 is connected to the lower part of the jack part 52 and has a structure detachable from the connecting part 25. The lower connecting part 53 is formed of, for example, a substantially U-shaped steel material that can be fitted to the outer surface of the connecting part 25. In a state where the lower connecting part 53 is fitted to the connecting part 25, the lower connecting part 53 and the connecting part 25 can be fixed using a screw (not shown) or the like.

[0029] Next, a method of moving the seismic isolation bearing 10 using the structure replacement device 1 will be described. As shown in FIGS. 2 and 3, first, the traveling part 2 is arranged at a predetermined position around the seismic isolation bearing 10. In the present embodiment, two traveling units 22 (a total of four) are arranged on both sides in the width direction of the seismic isolation bearing 10, respectively. Then, the two traveling units 22, 22 on one side are connected by the connecting part 23. The connection of the two traveling units 22, 22 is performed by attaching the connecting rod 30 to the fixing part 26. When attaching the connecting rod 30 to the fixing part 26, the movable part 28 is rotated upward with respect to the base part 27 of the fixing part 26, and the connecting rod 30 is arranged so as to be sandwiched between the base part 27 and the movable part 28. Then, the connecting rod 30 is fixed to the traveling unit 22 by fixing the base part 27 and the movable part 28 using a fastener 29 such as a bolt. By connecting the two traveling units 22, 22 with the connecting part 23, the two traveling units 22, 22 can be made to travel in the same direction simultaneously.

[0030] Subsequently, the support portion 3 is arranged at a predetermined position of the seismic isolation bearing 10. A pair of support beams 31, 31 are arranged before and after in the depth direction (the direction of movement) of the seismic isolation bearing 10. The pair of support beams 31, 31 are arranged at positions where they are locked to a step portion 14 formed between the lower surface of the upper support plate 12 of the seismic isolation bearing 10 and the seismic isolation rubber 13. A holding rod 33 is inserted through through-holes 35 of the pair of support beams 31, 31. As shown in FIG. 3, a fixture 34 such as a nut is attached to the holding rod 33, and the fixture 34 is screwed until the pair of support beams 31, 31 are securely locked to the step portion.

[0031] Subsequently, as shown in FIGS. 4 and 5, the height adjustment portion 5 and the traveling portion 2 are connected. After the adjustment of the support portion 3 is completed, the upper connection portion 51 is moved along the axial direction of the support beam 31 so that the connection portion 25 of the traveling unit 22 is positioned below the height adjustment portion 5. After the position adjustment of the upper connection portion 51 is completed, the jack portion 52 is extended downward. With the lower connection portion 53 of the height adjustment portion 5 fitted to the connection portion 25 of the traveling unit 22, the lower connection portion 53 and the connection portion 25 are connected using a fixture such as a screw or a bolt. In this state, the four jack portions 52 are operated to further extend the jack portions 52, so that the seismic isolation bearing 10 lifts off the concrete foundation 11. At this time, the four jack portions 52 are evenly operated so that the seismic isolation bearing 10 rises while maintaining a horizontal state.

[0032] When the seismic isolation bearing 10 is lifted off and separated from the concrete foundation 11, the lock of the traveling portion 2 is released, and the seismic isolation bearing 10 is moved to a predetermined position together with the structure replacement device 1.

[0033] For example, when the concrete foundation 11 continues to be used as it is and only the seismic isolation bearing 10 is replaced, after removing the existing seismic isolation bearing 10, a new seismic isolation bearing is attached to the structure replacement device 1, and in the reverse flow from when it was removed, the new seismic isolation bearing is transported together with the structure replacement device 1 to a predetermined position above the concrete foundation 11. Then, the jack part 52 is operated to place the new seismic isolation bearing at a predetermined position on the upper surface of the concrete foundation 11. After that, the structure replacement device 1 is removed from the new seismic isolation bearing, and the replacement of the seismic isolation bearing is completed. In this way, by simply operating the structure replacement device 1, the existing seismic isolation bearing 10 can be easily replaced with a new seismic isolation bearing. That is, the loading and unloading of the seismic isolation bearing 10 can be efficiently performed without relying on the experience of skilled workers.

[0034] The structure replacement device 1 of the present embodiment is a structure replacement device 1 used when removing an existing seismic isolation bearing 10 and installing a new seismic isolation bearing, and includes a traveling part 2 that moves the seismic isolation bearing 10 in a predetermined direction, a support part 3 that supports the seismic isolation bearing 10, and a height adjustment part 5 interposed between the traveling part 2 and the support part 3 and capable of adjusting the height of the support part 3 with respect to the traveling part 2, which are integrally configured. By configuring it in this way, the existing seismic isolation bearing 10 can be replaced with a new seismic isolation bearing by simply assembling and operating the structure replacement device 1 on site. That is, the loading and unloading (replacement) of the seismic isolation bearing 10 can be efficiently performed without relying on the experience of skilled workers.

[0035] Further, in the structure replacement device 1 of the present embodiment, since the support part 3 includes a pair of support beams 31, 31 that can be arranged on both sides of the seismic isolation bearing 10 and a holding part 32 that holds the distance between the pair of support beams 31, 31, by arranging the pair of support beams 31, 31 on both sides of the seismic isolation bearing 10 to be replaced and using the holding part 32 to hold the distance between the pair of support beams 31, 31, the seismic isolation bearing 10 can be reliably held from both sides.

[0036] Moreover, in the structure replacement device 1 of the present embodiment, since the height adjustment part 5 is a jack device (jack part 52), the seismic isolation bearing 10 can be reliably lifted to a predetermined height.

[0037] Next, a method for removing (replacing) the concrete foundation 11 will be described with reference to FIGS. 6 to 11.

[0038] FIGS. 6 to 8 show a first aspect of the foundation replacement device. As shown in FIGS. 6 and 7, when replacing the concrete foundation 11, the foundation replacement device 60 is used. The foundation replacement device 60 is composed of a plurality of replacement units 64. In this embodiment, the foundation replacement device 60 is composed of two replacement units 64, 64. The replacement unit 64 includes a traveling part 61, a jack part 62 connected to the traveling part 61, and a foundation support part 63 connected to the jack part 62.

[0039] The traveling part 61 has a plate part 65 on which the jack part 62 is placed on the upper surface, and wheels 66 arranged on the lower surface side of the plate part 65.

[0040] The jack part 62 is attached to the upper surface of the plate part 65. The jack part 62 is configured to expand and contract in the vertical direction.

[0041] The foundation support part 63 has a movable plate part 67 arranged above the jack part 62 and a support plate part 68 connected to the movable plate part 67. The movable plate part 67 is attached so as to move up and down in accordance with the expansion and contraction of the jack part 62. The movable plate part 67 is an L-shaped steel plate in a front view. The movable plate part 67 has a bottom plate part 70 formed with a through hole (not shown) through which a guide rod 69 extending from the traveling part 61 is inserted, and a vertical plate part 71 extending upward from the widthwise end of the bottom plate part 70. An urging part 72 such as a spring is provided between the plate part 65 and the bottom plate part 70. The urging part 72 urges in a direction to widen the distance between the plate part 65 and the bottom plate part 70. The movable plate part 67 and the support plate part 68 are connected by welding or the like.

[0042] A method of transporting the concrete foundation 11 using the foundation replacement device 60 will be described. First, the replacement units 64 are arranged on both sides in the width direction of the concrete foundation 11. The support plate portion 68 of the replacement unit 64 is pressed against the side surface of the concrete foundation 11. In this state, the support plate portion 68 and the side surface of the concrete foundation 11 are fixed using, for example, bolts or the like.

[0043] Subsequently, the concrete foundation 11 is lifted. Specifically, the jack portion 62 is driven to push up the movable plate portion 67 disposed above the jack portion 62. At this time, the driving force of the jack portion 62 and the biasing force of the biasing portion 72 are utilized to lift the concrete foundation 11 upward. The movable plate portion 67 is guided by the guide rod 69 and moves vertically upward.

[0044] As shown in FIG. 8, when the concrete foundation 11 is lifted to a predetermined height, the traveling portion 61 transports the concrete foundation 11 to a predetermined position.

[0045] FIGS. 9 to 11 show a second aspect of the foundation replacement device. As shown in FIGS. 9 and 10, when replacing the concrete foundation 11, the foundation replacement device 80 is used. The foundation replacement device 80 is composed of a plurality of replacement units 79. In the present embodiment, the foundation replacement device 80 is composed of two replacement units 79, 79. The replacement unit 79 includes a traveling portion 81, a push bolt portion 82 connected to the traveling portion 81, and a foundation support portion 83 connected to the push bolt portion 82.

[0046] The traveling portion 81 has a plate portion 84 on which the push bolt portion 82 is placed upward, and wheels 85 disposed on the lower surface side of the plate portion 84.

[0047] The plate portion 84 is a steel plate that is L-shaped when viewed from the front. The plate portion 84 has a bottom plate portion 86 and a vertical plate portion 87 that extends upward from the widthwise end of the bottom plate portion 86. A vertically long oblong hole 88 is formed in the vertical plate portion 87. At the upper end of the vertical plate portion 87, a placement portion 89 on which the lower end of the push bolt 90 is placed is provided. The placement portion 89 is provided in a recess 91 formed at the upper end of the vertical plate portion 87.

[0048] The push bolt portion 82 includes a push bolt 90 and a nut 92. Two push bolts 90 are arranged. The basic support portion 83 is configured to move up and down in accordance with the rotation of the push bolt 90.

[0049] The basic support portion 83 has a movable plate portion 93 and a support plate portion 94. The movable plate portion 93 has a horizontal plate portion 95 in which a through hole (not shown) through which the push bolt 90 is inserted is formed, and a connecting plate portion 96 that extends downward from the widthwise end of the horizontal plate portion 95. The nut 92 of the push bolt portion 82 is fixed to the lower surface of the horizontal plate portion 95. The support plate portion 94 and the connecting plate portion 96 are connected, for example, by welding. A guide rod 97 that extends in a substantially horizontal direction is provided from the connecting plate portion 96. The guide rod 97 passes through the oblong hole 88 of the vertical plate portion 87.

[0050] A method for transporting the concrete foundation 11 using the foundation replacement device 80 will be described. First, the replacement units 79 are arranged on both sides in the width direction of the concrete foundation 11. The support plate portion 94 of the replacement unit 79 is pressed against the side surface of the concrete foundation 11. In this state, the support plate portion 94 and the side surface of the concrete foundation 11 are fixed using, for example, bolts.

[0051] Subsequently, the concrete foundation 11 is lifted. Specifically, the push bolt 90 is rotated in a predetermined direction. Then, the horizontal plate portion 95 connected to the nut 92 moves upward. At this time, since the guide rod 97 of the movable plate portion 93 moves along the oblong hole 88, the movable plate portion 93 moves vertically upward. The support plate portion 94 connected to the movable plate portion 93 also moves upward to lift the concrete foundation 11 upward.

[0052] As shown in Fig. 11, when the concrete foundation 11 is lifted to a predetermined height, the traveling unit 81 transports the concrete foundation 11 to a predetermined position.

[0053] As described above, by using the foundation replacement device 60 or the foundation replacement device 80, the existing concrete foundation 11 can be easily removed and can be easily replaced with a newly installed concrete foundation. That is, the loading and unloading of the concrete foundation 11 can be efficiently performed without relying on the experience of skilled workers.

[0054] The embodiments of the structure replacement device and the structure replacement method according to the present invention have been described above. However, the present invention is not limited to the above embodiments and can be appropriately modified without departing from the gist thereof.

[0055] For example, in the present embodiment, the case where the support portion 3 is composed of a pair of support beams 31, 31 and the holding portion 32 has been described. However, the configuration is not limited to this as long as the seismic isolation bearing 10 (structure) can be supported.

[0056] Also, in the present embodiment, the height adjustment portion 5 is configured by a jack device (jack portion 52). However, as long as it is a mechanism capable of adjusting the height, a configuration other than the jack device, for example, a height adjustment bolt, may be used.

[0057] Furthermore, in the present embodiment, the case of moving the seismic isolation bearing 10 has been described. However, the object to be moved may be other than the seismic isolation bearing 10. Also, it may be used not only when replacing the seismic isolation bearing 10 but also when simply removing the seismic isolation bearing 10.

[0058] Note that there are 17 international goals adopted at the United Nations Summit in September 2015, namely "Sustainable Development Goals (SDGs)". The structure replacement device and the structure replacement method according to the present embodiment can contribute to the achievement of, for example, the goal of "9. Build the foundation for industry and technological innovation" among the 17 goals of these SDGs.

Description of Reference Numerals

[0059] 1…Structural replacement device 2…Traveling part 3…Support part 5…Height adjustment part 10…Seismic isolation bearing (structure) 31…Support beam 32…Holding part 52…Jack part (jack device)

Claims

1. A structure replacement device used when removing an existing structure and installing a new structure, comprising: A traveling unit that moves the structure in a predetermined direction; A support unit that supports the structure; A height adjustment unit interposed between the traveling unit and the support unit, capable of adjusting the height of the support unit relative to the traveling unit, and the three are integrally configured; The support unit includes: A pair of support beams that can be arranged on both sides of the structure; A holding unit that maintains the distance between the pair of support beams.

2. The structure replacement device according to claim 1, wherein the height adjustment unit is a jack device or a height adjustment bolt.

3. A structure replacement method for removing an existing structure and installing a new structure using the structure replacement device according to claim 1 or claim 2, comprising: Arranging the traveling units on both sides sandwiching the existing structure; Supporting and fixing the support unit to the existing structure; Operating the height adjustment unit to adjust the height of the support unit relative to the traveling unit, and lifting the existing structure to a predetermined height; Removing the existing structure with the traveling unit; After removing the existing structure, moving the new structure to a predetermined position using the structure replacement device; At the predetermined position, operating the height adjustment unit to install the new structure at the predetermined position.

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