Methods for moving vents, vent construction methods, and trolleys for vents

Abstract

To provide a bent moving method that can easily move a bent.SOLUTION: A method for moving a bent 1 that temporarily supports a member to be erected during bridge construction work includes: a dolly attachment process of attaching a dolly (a bent dolly 40) as a separate body from the bent 1 to the installed bent 1; a holding-up process of elevating the bent 1 from an installation surface G using an elevating part 70 provided on the bent dolly 40; and a moving process of moving the bent dolly 40 in a state where the bent 1 is elevated.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a method for moving a bent, a bent construction method, and a carriage for a bent.

Background Art

[0002] For example, Patent Document 1 discloses a technique related to a bent for temporarily supporting a bridge girder or the like during bridge erection work. The bent is composed of a base portion formed on an installation surface and a plurality of columns. In the bent construction method, a bent assembly process, a bridge truss erection process, a bridge girder connection process, and a bent disassembly process are performed. That is, in the bent assembly process, a bent is assembled using a mobile crane at a planned installation position of the bent, and after the bridge girders are connected, the bent is disassembled at the installation position of the bent using the mobile crane again. In bridge erection, in order to shorten the construction period and traffic control, it has become the mainstream to use a large mobile crane for batch erection and batch disassembly.

[0003] On the other hand, it is known to perform a bent construction method using a self-propelled bent including a multi-axial self-propelled carriage and a bent installed on the multi-axial self-propelled carriage. By using the self-propelled bent, work can be performed while moving the bent in the bridge axis direction by the multi-axial self-propelled carriage. That is, it is possible to move to the next planned installation position without disassembling the once assembled bent.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when constructing bridges at large intersections or on expressways, it may not be possible to install large mobile cranes. In such cases, there is a problem in that traffic restrictions must be extended or the bridge design must be modified. On the other hand, using a self-propelled bent can make the preparation and operation of a multi-axle self-propelled trolley difficult, potentially prolonging the construction period. Furthermore, the need for structural strength in a unified state of the multi-axle self-propelled trolley and bent complicates structural calculations.

[0006] This invention was made to solve the above problems, and aims to provide a method for moving a vent and a trolley for a vent that can be easily moved. Furthermore, the present invention aims to provide a bending method that can shorten traffic restrictions and prevent the design of bridges from being limited by the bending. [Means for solving the problem]

[0007] To solve the aforementioned problems, the present invention provides a method for moving a bent used to temporarily support members to be erected during bridge construction work, characterized in that it includes a trolley attachment step of attaching a separate trolley to the installed bent, a lifting step of raising the bent from the installation surface using a lifting part provided on the trolley, and a moving step of moving the trolley while the bent is raised.

[0008] According to the present invention, a separate trolley is attached to the bent, and the bent is moved while in a raised position. This makes it easy to move the bent. Furthermore, because the bent and the trolley are separate, preparation and movement are easy, and structural calculations for the bridge and bent can be performed in the same way as before.

[0009] Furthermore, the trolley mounting process preferably includes a chassis installation step of installing chassis bodies that are erected so as to protrude laterally on both sides of the vent and are provided in at least one pair, front and rear, in the direction of movement of the vent; a wheel installation step of installing wheel bodies at the lower part of both ends of each chassis body; and a lifting section installation step of installing the lifting section so as to connect each chassis body to the base of the vent.

[0010] According to the present invention, a trolley can be easily formed. Furthermore, the trolley mounting process preferably includes a chassis installation step of installing chassis bodies that are erected so as to protrude laterally on both sides of the vent and are provided in at least one front-to-rear pair in the direction of movement of the vent; a first unevenness absorption part installation step of installing first unevenness absorption parts that absorb unevenness of the running surface at the lower part of both ends of each chassis body; a wheel installation step of installing wheel bodies at the lower part of each first unevenness absorption part; and a lifting part installation step of installing the lifting part so as to connect each chassis body to the base of the vent.

[0011] According to the present invention, a trolley can be easily formed. Furthermore, because it is equipped with a first unevenness absorption section, it is possible to prevent the bent from tilting due to unevenness on the running surface. Furthermore, it is preferable that the lifting section includes a jack installed on the chassis, a reaction force receiving plate provided on the base of the vent, and a tension bar connecting the jack and the reaction force receiving plate.

[0012] According to the present invention, the lifting mechanism can be easily formed. Furthermore, it is preferable that the wheel body comprises a plurality of tires, a tire support portion that supports each tire parallel to the direction of movement, and a second unevenness absorbing portion that absorbs unevenness on the running surface.

[0013] According to the present invention, the wheel body can be easily formed. Furthermore, the number of tires can be increased or decreased as appropriate by the tire support section. In addition, because a second unevenness absorption section is provided, it is possible to prevent the bend from tilting due to unevenness of the running surface. Furthermore, it is preferable that the first unevenness absorbing section comprises a lower member provided on the upper part of the wheel body, an upper member provided on the lower part of the chassis body, and a pin support section that rotatably supports the lower member and the upper member, with its axial direction being parallel to the direction of movement, which is perpendicular to the direction of movement.

[0014] According to the present invention, the first unevenness absorption section can be easily constructed. Furthermore, the present invention is a bent construction method that uses bents to temporarily support members to be erected during bridge erection work, and is characterized by including a bent assembly step of assembling the bents in an assembly yard that is a location other than the planned installation location of the bents and is not subject to traffic restrictions, and a bent transport step of moving the assembled bents from the assembly yard to the planned installation location using the bent movement method described in claim 1.

[0015] According to the present invention, a separate trolley is attached to the bent, and the bent is moved while in a raised position. This makes it easy to move the bent. Furthermore, because the bent and the trolley are separate, preparation and movement are easy, and structural calculations for the bridge and bent can be the same as in the conventional method.

[0016] Furthermore, since the bents are assembled in the assembly yard rather than at the planned installation location, and can be easily moved in their assembled state, traffic restrictions can be shortened. In addition, large mobile cranes can be used in the assembly yard, so the bridge design is not subject to limitations imposed by the bents.

[0017] In addition, the present invention is a bent construction method using a bent for temporarily supporting a member to be erected during bridge erection work, and an existing bent is moved from the installation position of the bent to a dismantling yard where traffic control is not applied by the method of moving the bent according to claim 1, and a bent dismantling step of dismantling the existing bent in the dismantling yard, and is characterized by including these steps.

[0018] According to the present invention, a carriage separate from the bent is attached, and the bent is moved in a raised state. Thereby, the bent can be easily moved. In addition, since the bent and the carriage are separate, preparation and movement are easy, and the structural calculation of the bridge and the bent can be made the same as before.

[0019] In addition, since the bent dismantling step is carried out after moving to the dismantling yard instead of the planned installation position of the bent, traffic control can be shortened. In addition, since a large mobile crane can also be used in the dismantling yard, it is possible to prevent the design of the bridge from being restricted due to the bent.

[0020] In addition, the present invention is a carriage for a bent that moves a bent for temporarily supporting a member to be erected during bridge erection work, and includes a chassis body erected so as to protrude to both side sides of the bent, wheel bodies provided at lower portions of both end sides of the chassis body, and a lifting / lowering portion that connects the chassis body and a base portion of the bent and lifts and lowers the bent with respect to the chassis body.

[0021] According to the present invention, a carriage separate from the bent is attached, and the bent is moved in a raised state. Thereby, the bent can be easily moved. In addition, it is preferable to include a first unevenness absorption portion that absorbs unevenness of a running surface between the chassis body and the wheel bodies.

[0022] According to the present invention, it is possible to prevent the bent from tipping over due to unevenness of the running surface. In addition, it is preferable that the wheel bodies include a second unevenness absorption portion that absorbs unevenness of the running surface. According to the present invention, it is possible to prevent the tipping of the vent caused by unevenness of the running surface.

Effect of the Invention

[0023] According to the vent moving method and the vent cart of the present invention, the vent can be easily moved. Further, according to the vent construction method of the present invention, traffic restrictions can be shortened, and it is possible to prevent the design of the bridge from being restricted due to the vent.

Brief Description of the Drawings

[0024] [Figure 1] It is a side view of the vent according to the first embodiment of the present invention. [Figure 2] It is a front view of the vent according to the first embodiment. [Figure 3] It is a view taken along the arrow III-III in FIG. 1. [Figure 4] It is a front view of the vent cart according to the first embodiment. [Figure 5] It is a side view of the vent cart according to the first embodiment. [Figure 6] It is an enlarged front view of the vent cart according to the first embodiment. [Figure 7] It is a view taken along the arrow VII-VII in FIG. 6. [Figure 8] It is a view taken along the arrow VIII-VIII in FIG. 6. [Figure 9] It is a side view of the first unevenness absorption part. [Figure 10] It is a front view of the first unevenness absorption part. [Figure 11] It is a view taken along the arrow XI-XI in FIG. 10. [Figure 12] It is an enlarged side view (operation view) of the first unevenness absorption part. [Figure 13] It is a plan view showing the vent assembly process of the vent construction method according to the first embodiment of the present invention. [Figure 14] It is a perspective view showing a state where a holding member is installed in the chassis body installation process of the vent construction method according to the first embodiment. [Figure 15] This is a perspective view showing the state in which the inner chassis member has been installed during the chassis installation process of the vent construction method according to the first embodiment. [Figure 16] This is a perspective view showing the state in which the outer chassis members have been installed during the chassis installation process of the vent construction method according to the first embodiment. [Figure 17] This is a perspective view showing the state in which the upper sander has been installed during the chassis installation process of the vent construction method according to the first embodiment. [Figure 18] This is a perspective view showing the state after the lower sander has been installed in the chassis installation process of the vent construction method according to the first embodiment. [Figure 19] This is a perspective view showing the first unevenness absorption section installation process and the wheel body installation process of the bent construction method according to the first embodiment. [Figure 20] This is a perspective view showing the installation process of the lifting section of the bent construction method according to the first embodiment. [Figure 21] This is a perspective view showing the lifting process of the bent construction method according to the first embodiment. [Figure 22] This is a plan view showing the movement process (delivery process) of the bent construction method according to the first embodiment. [Figure 23] This is a plan view showing the movement process (export process) of the bent construction method according to the first embodiment. [Figure 24] This is a side view showing a trolley for vents according to a second embodiment of the present invention. [Modes for carrying out the invention]

[0025] [First Embodiment] A method for moving a bent, a bent construction method, and a bent trolley according to the first embodiment of the present invention will be described with reference to the drawings. In the description, "up and down," "left and right," and "front and back" refer to the arrows shown in Figures 1 and 2. These directions are used for convenience of explanation and do not limit the present invention. The left and right direction is also called the "bridge axis direction," and the front and back direction is also called the "direction perpendicular to the bridge axis."

[0026] <Vent configuration> First, as shown in Figures 1-3, the bent 1 used in this embodiment will be described. The bent 1 is a structure that temporarily supports the members being erected (in this embodiment, the bridge girder F) during bridge erection work. The bent 1 is assembled on site and dismantled after the predetermined work is completed. In this embodiment, the bent 1 is a foldable unit structure consisting of four columns, but this is merely an example, and the number of columns and the assembly method are not limited, and other bent structures such as panel bents may also be used.

[0027] The bent 1 comprises a base section 2, a column section 3, and a top section 4. The base section 2 is the foundation part and is provided on the installation surface (ground) G. The base section 2 comprises a plurality of base members 11 and a plurality of base members 12, which are assembled in a grid pattern. For example, H-shaped steel can be used for the base members 11 and 12. The base members 11 and 12 are integrally fastened together by fastening means or the like. Base plates J, J may be provided between the installation surface G and the base members 11.

[0028] In this embodiment, the column section 3 is mainly composed of four columns 13 (which may be distinguished as 13A, 13B, 13C, and 13D as appropriate). Each column 13 is erected at the point where the foundation members 11 and 12 intersect. Each column 13 is a rectangular prism and is generally the same shape. As shown in Figure 1, the column section 3 is provided with reinforcing sections 14 at predetermined intervals in the height direction. The reinforcing sections 14 consist of horizontal members 15, 15 spaced apart in the height direction and diagonal members 16, 16 that diagonally connect the horizontal members 15, 15. Also, as shown in Figure 2, the column section 3 is provided with horizontal members 17 and diagonal bracing members 18 at predetermined intervals in the height direction. The lower end of the column section 3 is joined to the foundation section 2 via a connecting plate PL, etc. The upper end of the column section 3 is joined to the top section 4 via a connecting plate PL, etc.

[0029] The top section 4 comprises a plurality of top members 19 and a plurality of top members 20, which are assembled in a grid pattern. The top members 19 and 20 can be made of, for example, H-shaped steel. The top members 19 and 20 are integrally fastened together by fastening means or the like. Multiple height adjustment sections 21 are provided on top of the top section 4. The height adjustment sections 21 are constructed, for example, by stacking multiple sandals in the height direction, and are the parts that support the bridge girder F.

[0030] <Cart for vents> Next, the vent trolley used in this embodiment will be described. As shown in Figures 4 and 5, the vent trolley 40 is separate from the vent 1 and is a device for lifting and moving (transporting) the vent 1. The vent trolley 40 is attached to the existing vent 1 as needed and is dismantled on-site after the work is completed.

[0031] The bent trolley 40 comprises a chassis section 50, a wheel section 60, a lifting section 70, and a first unevenness absorption section 80. The chassis section 50 is the base part of the bent trolley 40. As shown in Figure 5, the chassis section 50 comprises a first chassis body 51 and a second chassis body 52, which are spaced apart in the front-rear direction (direction of movement). As shown in Figure 4, the first chassis body 51 extends horizontally across columns 13A and 13C, with both ends protruding laterally from the bent 1. More specifically, the length of the first chassis body 51 (length in the left-right direction) is longer than the length of the base section 2 (length in the left-right direction).

[0032] As shown in Figure 5, the first chassis body 51 is composed of chassis members 53 installed on the front side and chassis members 53 installed on the rear side of columns 13A and 13C. The height dimension of the chassis members 53 is several tens of centimeters to about 1 m. The columns 13A and 13C are sandwiched between the chassis members 53, 53 installed at the front and rear. For example, H-shaped steel can be used for the chassis members 53, 53. The chassis members 53, 53 are supported by holding members 56 (see Figure 4) attached to each column 13. The first chassis body 51 and columns 13A and 13C are not joined together, and the first chassis body 51 and columns 13A and 13C are relatively movable in the height direction.

[0033] As shown in Figure 5, the second chassis 52 is composed of chassis members 54 installed in front of columns 13B and 13D and chassis members 54 installed behind them. The height of the chassis members 54 is approximately several tens of centimeters to 1 meter. The columns 13B and 13D are sandwiched between the chassis members 54, 54 installed at the front and rear. For example, H-shaped steel can be used for the chassis members 54, 54. The chassis members 54, 54 are supported by retaining members 56 (see Figure 14) attached to each column 13. The second chassis 52 and columns 13B and 13D are not joined together, and the second chassis 52 and columns 13B and 13D are relatively movable in the height direction.

[0034] The wheel section 60 is located below the chassis section 50 and is a part that can move by the rotation of the tires T. The wheel section 60 comprises a first wheel body 61, a second wheel body 62, a third wheel body 63, and a fourth wheel body 64.

[0035] As shown in Figure 4, the first wheel 61 and the third wheel 63 are installed below both ends of the first chassis 51. Also, as shown in Figure 19, the second wheel 62 and the fourth wheel 64 are installed below both ends of the second chassis 52. More specifically, the first wheel 61 is installed at a position corresponding to column 13A, the second wheel 62 is installed at a position corresponding to column 13B, the third wheel 63C is installed at a position corresponding to column 13C, and the fourth wheel 64 is installed at a position corresponding to column 13D. Since the first to fourth wheel 64 have the same structure, the first wheel 61 will be used as an example and explained in detail.

[0036] As shown in Figures 5 and 6, the first wheel body 61 consists of a tire support section 69 and three tire sections 65. The tire support section 69 extends horizontally and in the front-rear direction. The tire support section 69 may be made of any material that can support the tire sections 65, but in this embodiment it is made of two steel members (for example, H-beams).

[0037] In this embodiment, three tire sections 65 are provided for each tire support section 69, but the number of tire sections 65 can be appropriately set according to the size of the vent 1 and the site conditions. In addition, the length of the tire support section 69 can be appropriately changed according to the number of tire sections 65.

[0038] As shown in Figure 6, the tire section 65 comprises a pair of tires T, T, an axle 66, an axle bearing member 67, and a pin support section 68. The axle 66 is a member that rotatably supports the tires T, T provided at both ends. The axle bearing member 67 is connected to the axle 66 via the pin support section 68. The axial direction of the pin support section 68 is parallel to the front-rear direction. The axle bearing member 67 and the tire support section 69 are fastened together via fastening means, etc. The axle 66 is rotatable relative to the axle bearing member 67 around the pin support section 68. This allows the unevenness of the running surface to be absorbed when the bend trolley 40 moves, and prevents the bend 1 from tilting in the left-right direction. The "second unevenness absorbing section" of the claim is composed of the axle 66, the axle bearing member 67, and the pin support section 68. The second unevenness absorbing section may also be composed of members capable of absorbing shocks and tilts, such as a suspension or shock absorber.

[0039] As shown in Figures 6 and 7, the lifting section 70 is the part that raises and lowers the vent 1 relative to the chassis section 50. Three lifting sections 70 are installed on the first chassis body 51 and three are also installed on the second chassis body 52. ​​The lifting section 70 is equipped with a jack 71, a reaction force receiving plate 72, and a tension bar 73. Various types of jacks, such as hydraulic jacks, can be used for the jack 71. As shown in Figure 8, the reaction force receiving plate 72 is positioned across the back surfaces of the upper flanges of adjacent foundation members 11, 11 of the foundation section 2. The tension bar 73 is a metal rod-shaped member that connects the jack 71 and the reaction force receiving plate 72.

[0040] As shown in Figure 7, the jack 71 is installed on upper sanders 74, 74 that are mounted across the upper surfaces of the chassis members 53, 53 of the first chassis body 51. Also, as shown in Figure 6, a lower sander 75 is mounted on the lower surface of the chassis members 53, 53. The tension bar 73 is inserted between the upper sanders 74, 74 and between the lower sanders 75, 75. This prevents the tension bar 73 (bent 1) from swinging in the left-right direction. Alternatively, as shown in Figure 8, three pairs of auxiliary sanders may be provided so as to straddle the upper surfaces of the base members 11, 11, and the tension bar 73 may be inserted between these auxiliary sanders.

[0041] The first unevenness absorption section 80 is a part that can prevent the bent 1 from tilting by absorbing unevenness on the running surface. As shown in Figures 5 and 6, the first unevenness absorption section 80 is installed at both ends of the first chassis body 51 and at both ends of the second chassis body 52. ​​In other words, the first unevenness absorption section is installed for each of the first wheel bodies 61 to the fourth wheel bodies 64. Since each first unevenness absorption section 80 has the same form, the first unevenness absorption section 80 provided on the first wheel body 61 will be described first.

[0042] The first unevenness absorbing section (bolster) 80 is a part that absorbs unevenness on the running surface. As shown in Figures 10 and 11, the first unevenness absorbing section 80 comprises a lower member 81, an upper member 82, and a pin support section 83. The lower member 81 is fastened to the tire support section 69 of the first wheel body 61 by fastening means or the like. The lower member 81 comprises a bottom plate section 81a and side plate sections 81b, 81b that rise from both the left and right sides of the bottom plate section 81a. The lower member 81 is a box-shaped body that opens in the front-rear direction and upward.

[0043] The upper member 82 has a T-shaped cross-section and comprises an upper plate portion 82a and a vertical plate portion 82b. As shown in Figure 9, the upper member 82 is fastened to the lower surfaces of the chassis members 53, 53 of the first chassis body 51 by fastening means or the like. In other words, the front and rear ends of the upper plate portion 82a support the chassis members 53, 53, respectively. As shown in Figure 10, the upper member 82 is rotatably housed inside the lower member 81. The upper plate portion 82a is a plate-shaped member arranged parallel to the horizontal direction. The vertical plate portion 82b is perpendicular to the upper plate portion 82a and arranged parallel to the front-rear direction.

[0044] The shaft portion 83a of the pin support portion 83 extends parallel to the left-right direction and is inserted through through holes provided in the side plate portions 81b, 81b and the vertical plate portion 82b, respectively. As a result, as shown in Figure 12, when there is unevenness on the running surface, the lower member 81 rotates relative to the upper member 82 around the pin support portion 83. In other words, the first unevenness absorption portion 80 rotates like a seesaw, so that the tilt of the first wheel body 61 is not transmitted to the bend 1 side. The first unevenness absorption portion can also be configured to include members capable of absorbing shocks and tilts, such as a suspension or shock absorber.

[0045] <Bent construction method> Next, the bent construction method according to this embodiment will be described. The bent construction method according to this embodiment includes a bent assembly process, a bent delivery process, a height adjustment process, a bridge girder installation process, a bridge girder connection process, and a bent removal process.

[0046] The bent assembly process is the process of assembling bent 1, as shown in Figure 13. Here, the planned installation position U for bent 1 is set between bridge piers Z, Z which are spaced apart and constructed between roadways S, S. The assembly of bent 1 is carried out in an assembly / disassembly yard Y, which is a different location from the planned installation position U and roadways S. The assembly / disassembly yard Y is a flat area that is not subject to traffic restrictions and is not affected by height restrictions for large mobile cranes. It is preferable that the assembly / disassembly yard Y is directly in front of and in a straight line with respect to the planned installation position U. It is also preferable to provide appropriate paving boards between the assembly / disassembly yard Y and the planned installation position U to ensure that the roadway is flat.

[0047] The vent delivery process involves attaching a vent trolley 40 to the assembled vent 1, and then moving the vent 1 from the assembly / disassembly yard Y to the planned installation location U. The vent delivery process includes a trolley attachment process, a lifting process, a moving process, and an installation process. The "vent moving method" of the present invention includes at least the trolley attachment process, the lifting process, and the moving process from the above-mentioned steps.

[0048] The trolley installation process involves the chassis installation process, the first unevenness absorption section installation process, the wheel installation process, and the lifting section installation process. These processes are also carried out at assembly / disassembly yard Y. In the chassis installation process, first, as shown in Figure 14, retaining members 56 are installed on each side of columns 13A, 13B, 13C, and 13D, parallel to the horizontal and parallel to the front-rear direction. Each retaining member 56 has an L-shaped cross-section, is installed at the same height, and extends laterally on both sides relative to each column 13.

[0049] Next, in the chassis installation process, as shown in Figure 15, the chassis member 53 is installed so as to straddle the opposing retaining members 56, 56. The chassis member 53 is installed adjacent to the inside of the columns 13A, 13C. In addition, the chassis member 54 is installed so as to straddle the opposing retaining members 56, 56. The chassis member 54 is installed adjacent to the inside of the columns 13B, 13D.

[0050] Next, in the chassis installation process, as shown in Figure 16, chassis member 53 is installed so as to straddle the opposing retaining members 56, 56. Chassis member 53 is installed adjacent to the outside of columns 13A, 13C. Chassis member 54 is also installed so as to straddle the opposing retaining members 56, 56. Chassis member 54 is installed adjacent to the outside of columns 13B, 13D. Chassis members 53, 53 are parallel to each other, facing each other with columns 13A, 13C in between, and protrude laterally. Chassis members 54, 54 are parallel to each other, with columns 13B, 13D in between, and protrude laterally. Each chassis member 53, 54 is above the retaining members 56 and is relatively movable in the height direction without being fastened to the adjacent column 13.

[0051] Next, as shown in Figure 17, upper sandals 74, 74 are installed so as to straddle the upper surfaces of the chassis members 53, 53 via fastening means, etc. Three sets of upper sandals 74, 74 are installed on the first chassis body 51. Also, upper sandals 74, 74 are installed so as to straddle the upper surfaces of the chassis members 54, 54 via fastening means, etc. Three sets of upper sandals 74, 74 are installed on the second chassis body 52.

[0052] Next, as shown in Figure 18, the lower sandals 75, 75 are installed so as to straddle the lower surfaces of the chassis members 54, 54 via fastening means, etc. Three sets of lower sandals 75, 75 are installed under the first chassis body 51 so as to correspond to the upper sandals 74, 74. The lower sandals 75, 75 are also installed so as to straddle the lower surfaces of the chassis members 54, 54 via fastening means, etc. Three sets of lower sandals 75, 75 are installed under the second chassis body 52 so as to correspond to the upper sandals 74, 74. The first chassis body 51 can be integrated by joining the chassis members 53, 53 with the upper sandals 74 and lower sandals 75. Similarly, the second chassis body 52 can be integrated by joining the chassis members 54, 54 with the upper sandals 74 and lower sandals 75.

[0053] Next, as shown in Figure 19, a first unevenness absorption section installation step is performed in which the first unevenness absorption section 80 is installed, and a wheel body installation step is performed in which each wheel body is installed. In this step, the first unevenness absorption section 80 is installed in advance on each wheel body (first wheel body 61 to fourth wheel body 64). Then, each wheel body (first wheel body 61 to fourth wheel body 64) with the first unevenness absorption section 80 installed is placed on the lower ends of both ends of the first chassis body 51 and the lower ends of both ends of the second chassis body 52. ​​For example, in the third wheel body 63 shown in Figure 19, chassis members 53, 53 are installed on both ends of the upper member 82 of the first unevenness absorption section 80.

[0054] Next, in the lifting section installation process, as shown in Figure 20, the lifting section 70 is installed. In the lifting section installation process, each jack 71 is installed on the six sets of upper sanders 74, 74, and the reaction force receiving plate 72 (see Figure 6) is installed on the base member 11 via the tension bar 73. With this, the attachment of the bent trolley 40 to the bent 1 is completed.

[0055] Next, in the lifting process, as shown in Figure 21, the lifting unit 70 is operated to lift the bent 1 from the assembly / disassembly yard Y by several centimeters to about ten centimeters. Next, in the moving process, as shown in Figure 22, the bent 1 is moved using the bent trolley 40. The towing device K is installed on the roadway S on the opposite side of the bent 1, with the planned installation location U in between. The towing device K and the bent trolley 40 are connected by multiple wires W, W. The towing device K then pulls the bent trolley 40 via the wires W, W, and moves it to the planned installation location U.

[0056] Next, in the installation process, as shown in Figure 23, the lifting mechanism 70 is operated at the planned installation position U to lower the vent 1, and the vent 1 is installed on the installation surface G. At this time, the vent trolley 40 is left attached to the vent 1. Next, in the height adjustment process, as shown in Figures 1 and 2, the height adjustment unit 21 is installed on the top 4 to adjust the height relative to the bridge girder F.

[0057] Next, in the bridge girder installation process, as shown in Figures 1 and 2, the bridge girder F is temporarily placed on the bent 1 via the height adjustment section 21. Next, in the bridge girder connection process, adjacent bridge girders F, F are connected to each other. Once bridge girders F are connected, bent 1 is no longer needed, and the removal work begins.

[0058] Next, in the vent removal process, as shown in Figure 23, the following steps are performed: preparation, lifting, moving, and dismantling. In the preparation process, the height adjustment section 21 is removed, and the towing device K is installed at a location opposite the planned installation location U across the roadway S (in this case, the assembly / disassembly yard Y). The lifting and moving processes are generally the same as the delivery process. Once the bent 1 reaches the assembly / disassembly yard Y, the bent 1 is installed in the assembly / disassembly yard Y.

[0059] Finally, in the dismantling process, as shown in Figure 23, the bent trolley 40 and the bent 1 are dismantled in the assembly / dismantling yard Y. A large mobile crane may be used in the dismantling process as needed. This concludes the bent construction method of this embodiment.

[0060] <Previous challenges> Traditionally, when using the bent construction method, a large mobile crane would travel along roadway S to assemble and dismantle the bent 1. Therefore, traffic on roadway S had to be restricted during both the assembly and dismantling of the bent 1. Furthermore, if the large mobile crane was subject to height restrictions, it was necessary to address this by extending traffic restrictions or modifying the bridge design. These issues were particularly pronounced at sites with challenging conditions, such as large intersections or when constructing bridges on expressways.

[0061] Furthermore, when using a self-propelled bent that integrates a multi-axle self-propelled trolley and a bent, the preparation and operation of the multi-axle self-propelled trolley becomes difficult, potentially prolonging the construction period. In addition, the structural calculations become complex because the strength of the integrated multi-axle self-propelled trolley and bent is required.

[0062] <Effects> In contrast, according to the method of moving the vent according to this embodiment, a separate vent trolley 40 is attached to the vent 1 after it has been assembled, and the vent 1 is moved while it is raised. This makes it easy to move the vent 1. Furthermore, since the vent 1 and the vent trolley 40 are separate, preparation and movement are easy, and structural calculations for the bridge and the vent 1 can be handled in the same way as before.

[0063] Furthermore, according to the method of moving the vent according to this embodiment, the vent trolley 40 is equipped with a chassis (first chassis 51 and second chassis 52), wheels (first to fourth wheel 64), a lifting section 70, and a first unevenness absorption section 80, so the vent trolley 40 can be easily formed. Also, when the vent 1 is raised and lowered, the chassis members 53, 53 of the first chassis 51 and the chassis members 54, 54 of the second chassis 52 guide each column 13. This allows the raising and lowering of the vent 1 to be performed stably. In addition, because it is equipped with a first unevenness absorption section 80, it is possible to prevent the vent 1 from tilting (tilting forward or backward relative to the direction of travel) due to unevenness of the running surface.

[0064] Furthermore, as shown in Figure 6, the tire section 65 is designed so that the axle 66 rotates relative to the axle bearing member 67 around the pin support section 68, thereby better preventing the bend 1 from tilting (tilting to the left or right with respect to the direction of travel) caused by unevenness in the running surface. In other words, by providing a second unevenness absorption section composed of the axle 66, axle bearing member 67, and pin support section 68, tilting to the left or right with respect to the direction of travel can be prevented. In short, in this embodiment, since the first unevenness absorption section 80 and the second unevenness absorption section are provided, tilting of the bend 1 caused by unevenness in the running surface can be prevented synergistically.

[0065] Furthermore, according to the method of moving the vent according to this embodiment, the lifting section 70 includes a jack 71 installed on the chassis (first chassis 51 and second chassis 52), a reaction force receiving plate 72 provided on the base 2 of the vent 1, and a tension bar 73 connecting the jack 71 and the reaction force receiving plate 72, so the lifting section 70 can be easily formed. In addition, since three lifting sections 70 are provided on each chassis, the lifting and lowering of the vent 1 can be performed stably.

[0066] Furthermore, according to the method of moving the vent according to this embodiment, the wheel bodies (first wheel bodies 61 to fourth wheel bodies 64) are equipped with a plurality of tires T and tire support parts 69 that support each tire T parallel to the direction of movement, so the wheel bodies can be easily formed. In addition, the number of tires T can be increased or decreased as appropriate by changing the length of the tire support parts 69.

[0067] Furthermore, according to the vent movement method of this embodiment, the first unevenness absorbing section 80 comprises a lower member 81, an upper member 82 provided at the lower part of the chassis body (first chassis body 51 and second chassis body 52), and a pin support section 83 that rotatably supports the lower member 81 and the upper member 82, with its axial direction parallel to the direction of movement which is perpendicular to the direction of movement. This makes it possible to easily construct the first unevenness absorbing section 80.

[0068] Furthermore, according to the bent construction method of this embodiment, the bent 1 is assembled in an assembly / disassembly yard Y, which is a location other than the planned installation location U, where there are no traffic restrictions and no height restrictions for large mobile cranes. After that, the bent 1, already erected, is transported to the planned installation location U. As a result, traffic restrictions do not need to be imposed while the bent 1 is being assembled, thus shortening the period of traffic restrictions. In addition, since large mobile cranes can be used in the assembly / disassembly yard Y, it is possible to prevent the bridge design from being restricted due to the bent.

[0069] Furthermore, according to the bent construction method of this embodiment, after the erected bent 1 is removed, the bent 1 is dismantled in an assembly / dismantling yard Y, which is a location other than the planned installation location U of the bent 1, where there are no traffic restrictions and there are no height restrictions for large mobile cranes. As a result, traffic restrictions do not need to be imposed while the bent 1 is being dismantled, thus shortening the period of traffic restrictions.

[0070] [Second Embodiment] Next, a second embodiment of the present invention will be described. As shown in Figure 24, the configuration of the vent trolley 40A differs from that of the first embodiment. In the second embodiment, the first unevenness absorption section 80 is omitted, and the wheel bodies 90, 90 are a pair, left and right with respect to the direction of travel, which is another difference from the first embodiment.

[0071] The wheel body 90 is composed of a tire support section 69A and a plurality of tire sections 65. In this embodiment, six tire sections 65 are provided, but the number is not limited. The lower surfaces of the first chassis body 51 and the second chassis body 52 are attached to the upper surface of the tire support section 69A via fastening means or the like.

[0072] As in the second embodiment, the first unevenness absorption section 80 may be omitted, and the wheel bodies 90 (tire support sections 69) may be directly provided on the lower surfaces of the first chassis body 51 and the second chassis body 52. ​​This simplifies the structure of the bent trolley 40A. The second embodiment can be applied, for example, when the height of the bent 1 is low.

[0073] While embodiments of the present invention have been described above, the design can be modified as appropriate without straying from the spirit of the invention. For example, in this embodiment, the assembly yard and the dismantling yard are in the same location (assembly / dismantling yard Y), but they may be in different locations. Also, for example, if there are six columns in the front-rear direction of the bent (perpendicular to the bridge axis), three sets of chassis bodies and six each of wheel bodies and first unevenness absorption parts may be provided. In other words, the chassis bodies, wheel bodies and first unevenness absorption parts can be appropriately set according to the structure and size of the bent.

[0074] Furthermore, although a towing device K was used in the loading and unloading processes, the bent 1 may also be moved by pushing it from the rear using, for example, a device. Alternatively, a rotary drive source may be provided on the bent trolley 40 to allow it to move under its own power. In addition, although the bent 1 was moved in a direction perpendicular to the bridge axis in this embodiment, it may also be moved in the direction of the bridge axis. [Explanation of Symbols]

[0075] 1 vent 2 Foundation part 3 Pillar part 4 Top 13 pillars 40. Trolley for vents (trolley) 50 Chassis section 51. First Chassis (Chassis Body) 52 Second Chassis (Chassis) 53 Chassis members 54 Chassis members 60 Wheel section 61 First wheel body 62 Second wheel body 63 Third wheel body 64 Fourth wheel body 65 Tire section 69 Tire support section 70 Lifting section 71 Jack 72 Reaction force receiving plate 73 Tension Bar 80 First unevenness absorption section 81 Lower member 82 Upper member 83 Pin support section F Bridge girder G Installation surface T-tire Y Assembly and Dismantling Yard (Assembly Yard, Dismantling Yard) Z pier

Claims

1. A method for moving bents used to temporarily support structural members during bridge construction work, A trolley installation process involves attaching a trolley, separate from the vent, to the installed vent. A lifting step is performed by using a lifting mechanism provided on the trolley to raise the vent from the installation surface, The process includes moving the trolley while the vent is raised, In the trolley installation process, A chassis installation step involves installing chassis bodies that are mounted so as to protrude laterally on both sides from the vent, and that at least one pair of chassis bodies are provided in the front and rear directions relative to the direction of movement of the vent. A first unevenness absorption section installation step involves installing a first unevenness absorption section at the lower part of both ends of each chassis body to absorb unevenness on the running surface, A wheel installation step involves providing a wheel body at the lower part of each of the first unevenness absorption sections, A method for moving a vent, characterized by including a step of installing the lifting unit so as to connect each of the chassis bodies with the base of the vent.

2. The aforementioned lifting mechanism is A jack installed on the chassis body, A reaction force receiving plate provided at the base of the vent, The method for moving a vent according to claim 1, further comprising a tension bar connecting the jack and the reaction force receiving plate.

3. The wheel body is Multiple tires, A tire support section that supports each of the tires parallel to the aforementioned direction of movement, A method for moving a vent according to claim 1, characterized by comprising a second unevenness absorbing part that absorbs unevenness on the running surface.

4. The first unevenness absorbing section is, A lower member provided on the upper part of the wheel body, An upper member provided at the lower part of the chassis body, The method for moving a vent according to claim 1, further comprising a pin support portion that rotatably supports the lower member and the upper member, and whose axial direction is parallel to the direction of movement which is perpendicular to the direction of movement.

5. A bent construction method that uses bents to temporarily support the members being erected during bridge construction work, The bent assembly process involves assembling the bent in an assembly yard located outside the planned installation site and where there are no traffic restrictions. This includes a vent delivery process, in which the assembled vent is moved from the assembly yard to the planned installation location by a method for moving the vent, The method for moving the aforementioned vent is: A trolley installation process involves attaching a trolley, separate from the vent, to the installed vent. A lifting step is performed by using a lifting mechanism provided on the trolley to raise the vent from the installation surface, A vent construction method characterized by including a moving step of moving the trolley while the vent is raised.

6. A bent construction method that uses bents to temporarily support the members being erected during bridge construction work, Depending on the method of moving the vents, the process involves moving the existing vents from their installation location to a demolition yard where there are no traffic restrictions, and This includes a bent dismantling process in which existing bents are dismantled at the aforementioned dismantling yard, The method for moving the aforementioned vent is: A trolley installation process involves attaching a trolley, separate from the vent, to the installed vent. A lifting step is performed by using a lifting mechanism provided on the trolley to raise the vent from the installation surface, A vent construction method characterized by including a moving step of moving the trolley while the vent is raised.

7. A trolley for moving bents used to temporarily support structural members during bridge construction, A chassis body is erected so as to protrude from both sides of the vent, Wheel bodies provided at the lower ends of both ends of the chassis body, The chassis body and the base of the vent are connected, and the lifting mechanism is provided to raise and lower the vent relative to the chassis body. A trolley for bending, characterized by having a first unevenness absorbing section between the chassis and the wheel body that absorbs unevenness on the running surface.

8. A trolley for moving bents used to temporarily support structural members during bridge construction, A chassis body is erected so as to protrude from both sides of the vent, Wheel bodies provided at the lower ends of both ends of the chassis body, The chassis body and the base of the vent are connected, and the lifting mechanism is provided to raise and lower the vent relative to the chassis body. The aforementioned wheel body is characterized by having a second unevenness absorbing section that absorbs unevenness on the running surface, making it a trolley for vents.

Images