JP3968579B2 - Self-propelled precast slab erection machine - Google Patents

Self-propelled precast slab erection machine Download PDF

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Publication number
JP3968579B2
JP3968579B2 JP2003092781A JP2003092781A JP3968579B2 JP 3968579 B2 JP3968579 B2 JP 3968579B2 JP 2003092781 A JP2003092781 A JP 2003092781A JP 2003092781 A JP2003092781 A JP 2003092781A JP 3968579 B2 JP3968579 B2 JP 3968579B2
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Japan
Prior art keywords
frame
floor slab
portal
type
suspended
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JP2003092781A
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Japanese (ja)
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JP2004300688A (en
Inventor
定明 中村
満 堂前
雅人 山口
友和 行川
健司 鈴木
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ピーシー橋梁株式会社
三信工業株式会社
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a precast slab erection machine used in a replacement work for a precast slab of an existing bridge.
[0002]
[Prior art]
Conventionally, precast slabs have been installed on bridges using large machines such as truck cranes, forklifts, portal cranes, and jib cranes. However, in the replacement work of precast floor slabs for existing bridges, the weight of the work machine installed on the floor slab is limited by the load capacity of the floor slab, and in order to ensure the passage of the bridge in the daytime, Due to the increasing number of cases where it is required to stop the work and remove the work machine, the following difficulties have become conspicuous in each of the various work machines that have been used in the past.
[0003]
(1) Truck crane Truck cranes are self-propelled and there is no problem in terms of removing equipment in the daytime, but the total weight when the floor slab is suspended is equal to the load bearing capacity of the floor slab set at the time of erection of the bridge. In addition, the minimum turning radius when a floor slab is suspended is increased in a cantilever beam of a truck crane, and the beam rotates in a narrow work space such as a bridge where a structure exists on a road surface such as a truss bridge. This makes it difficult to supply the floor slab from the rear to the front of the crane truck.
(2) Forklifts Forklifts can be self-propelled, and there is no problem in removing the equipment in the daytime. However, modification of the lifting device is required, and the working radius is smaller than that of truck cranes.
[0004]
(3) Girder Girder is a large facility, and its assembly, dismantling and transportation are expensive. Therefore, assembling and dismantling on-site is not economically inquiring and cannot meet the requirement for daytime equipment removal.
(4) Gate-type cranes Gate-type cranes use steel wheels for their travel, which necessitates the installation of special rails and other equipment, and if this is installed on an existing floor slab, It is necessary that the weight of the crane does not exceed the load capacity of the floor slab. In addition, since it costs money to assemble, dismantle, and transport the portal crane, as in the case of the girder, repeated assembly and disassembly is not an economical matter and cannot meet the requirement for daytime equipment removal.
(5) Jib cranes Jib cranes are large in equipment and have the same machine weight restrictions and economic problems as the girder and portal crane.
[0005]
[Problems to be solved by the invention]
In view of the above-mentioned conventional technology, a self-propelled precast floor slab erection machine that is small and light and does not require assembly and disassembly during transportation is used in the replacement work of a precast floor slab of an existing bridge.
[0006]
[Means for Solving the Problems]
The present inventor has solved the above problems by the following means.
(1) A portal structure held by four legs, four rail-free traveling devices (having rubber tires or crawlers) mounted with the four legs of the portal structure, and the gate Two rails disposed and fixed in the longitudinal direction at the lower part of the rectangular frame frame at the upper part of the mold structure, and the long sides of the two rails are suspended, and along the rails A movable rectangular frame-type movable rack, a horizontal beam that is constructed between two long sides of the frame-shaped movable rack, and that is movable in the longitudinal direction of the frame-shaped movable rack, and a floor that is suspended from the horizontal beam. A suspension device for suspending the plate, and two struts suspended from the front ends of the two long sides of the frame-type moving rack in the same direction. Traveling precast slab erection machine.
(2) A portal structure held by four legs, four rail-free traveling devices (having rubber tires or crawlers) on which the four legs of the portal structure are mounted, and the gate Two rails disposed and fixed in the longitudinal direction at the lower part of the rectangular frame frame at the upper part of the mold structure, and the long sides of the two rails are suspended, and along the rails A movable rectangular frame-type movable frame, a horizontal beam that is constructed between two long sides of the frame-type movable frame and movable in the longitudinal direction of the frame-type movable frame, and a horizontal beam that is suspended from the horizontal beam. A suspension device for suspending the floor slab movable along the two sides, and two struts suspended from the front ends of the two long sides of the frame type movable rack in the same direction. A self-propelled precast slab erection machine.
[0007]
(3) The gate-shaped structure is composed of an upper frame-shaped frame and four inverted L-shaped legs, and the short side of the frame-shaped frame has two rectangular tubes juxtaposed, By inserting the horizontal part of the inverted L-shaped leg into the square tube part from the right and the other from the left, the interval between the left and right legs can be changed. The self-propelled precast slab erection machine according to (1) or (2).
(4) The four legs and the column of the portal structure have a sheath tube structure that can be expanded and contracted, and the height of the portal structure can be changed. The self-propelled precast slab erection machine according to any one of 1) to (3).
(5) A rectangular frame-shaped moving rack in which the long sides are suspended from the two rails arranged and fixed at the lower part of the frame-shaped frame of the gate-type structure and movable along the rails; By adopting a two-stage rail transfer system that is constructed between two long sides of the frame-type moving rack and that is configured by one transverse beam that is movable in the longitudinal direction of the frame-type moving rack, The self-propelled precast floor according to any one of (1) to (4), wherein the range of movement of the suspension device that is suspended and moved can be extended to the outside of the gate-type structure. Plate erection machine.
[0008]
(6) Two struts suspended at the ends in the same direction of the two long sides of the frame-type moving rack are used to transfer the suspension device that suspends the floor slab to the outside of the portal structure. The self-propelled precast slab erection machine according to any one of (1) to (5), which is made safe and easy.
(7) A rotating carriage that mounts and rotates a floor slab transferred by a suspension device of a precast slab erection machine is disposed between the support column and the front leg of the portal structure. The self-propelled precast slab erection machine according to any one of (1) to (6).
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings of the embodiments.
FIG. 1 is a perspective view during working of the embodiment of the present invention, FIG. 2 is an explanatory view showing the configuration of the embodiment of the present invention, shortening of each member, and accommodation direction, and FIG. 3 is a perspective view during transportation of the embodiment of the present invention. 4 and FIG. 4 are schematic explanatory views of a two-stage rail type transfer system according to an embodiment of the invention, and FIGS. 5 to 7 are explanatory views of the erection operation of the precast slab erection machine according to the embodiment of the present invention.
In the figure, 1 is a precast floor slab erection machine, 2 is a frame-type frame, 3 is a leg, 4 is a railless traveling device, 5 is a base, 6 is a rail, 6a is a lower frame of the rail 6, and 7 is an electric slide type Lifting device, 7 ', 7 "are sliding type lifting devices, 8 is a frame type moving rack, 8a is an upper frame of the frame type moving rack 8, 9 is a cross beam, 10 is a chain block, 11 is a brace, 12 is a support column , 13, 13 ′, 13 ″ are floor slabs, 14 is an outrigger, and 15 is a rotating carriage.
[0010]
【Example】
As shown in FIGS. 1 and 2, the self-propelled precast floor slab erection machine 1 according to the embodiment of the present invention has a rectangular frame-shaped frame 2 having an upper gate structure and four legs 3 having an inverted L-shape. And the two short sides of the frame-type frame 2 have a structure in which two square tubes are juxtaposed, respectively, and one of the two square tubes from the right and the other from the left The horizontal portion of the inverted L-shaped leg 3 is inserted, and the interval between the legs 3 can be enlarged or reduced. This portal structure is mounted on a prismatic base 5 having two sets of left and right, two rail-less traveling devices 4 on the front and rear, and is configured to be able to run on its own.
Further, two rails 6 of H-type shape in the longitudinal direction at the bottom of the frame-shaped frame 2 is arranged and fixed, the two rails 6, long side H-shaped cross section shape of the two A rectangular frame-shaped movable rack 8 composed of rails 80 is suspended so as to be movable along the rail 6 via an electric slide type suspension device 7, and two rails forming the long side of the frame-shaped movable rack 8. Between 80, a horizontal beam 9 is installed to be movable in the longitudinal direction of the frame-type moving rack 8 via a slide type lifting device 7 '. A chain block 10 is suspended.
In addition, two struts 12 are suspended from the front ends of the two long sides of the frame type moving rack 8 in the same direction.
[0011]
The vertical portions of the four inverted L-shaped legs 3 constituting the portal structure and the support column 12 have a stretchable sheath structure, and the short side of the frame frame 2 of the portal structure. The structure of attaching the leg 3 to the section, the frame-type structure 8, the leg 3, the column 12, and the outrigger 14 are shortened by inserting and shortening in the direction indicated by the arrow in FIG. The shape is changed to the shape at the time of transportation shown in FIG. 3 so that the precast slab erection machine can be transported without being disassembled.
In addition, as shown in FIG. 4A, the frame-type moving rack 8 is suspended from the rail 6 by using two electric slide-type hanging apparatuses 7 fixed near the center of the frame-shaped moving rack 8. Done through. That is, as shown in FIGS. 4B and 4C, the lower part of the electric slide suspending device 7 is fixed to the upper frame 8a of the frame type moving rack 8, and the upper portion of the electric slide suspending device 7 is fixed. A wheel W that rotates while being in contact with the upper surface of the lower frame 6a of the rail 6 with the rail 6 interposed therebetween is pivotally attached.
As described above, a total of two support columns 12 are vertically provided at the front end portions in the same direction of the two rails forming the long sides of the frame-type moving rack 8. Accordingly, the two struts 12 move with the movement of the frame-type moving rack.
[0012]
Next, the slab erection operation of the precast slab erection machine 1 according to the embodiment of the present invention will be described. The precast slab erection machine 1 transported to the work site in the shape shown in FIG. 3 and FIG. 4 is self-propelled to a predetermined position by the rail-type traveling device 4, and then the drawer of the leg 3 from the frame frame 2 The legs 3 and the columns 12 are extended, and are fixed on the floor slab by the outrigger 14 in the shape shown in FIG. At this time, it is also preferable to use reinforcing braces (not shown) between the leg portion of the inverted L-shaped leg 3 of the portal structure and the frame frame and between the leg 3 and the base 5.
[0013]
The work of laying the floor slab 13 by the precast floor slab erection machine 1 fixed on the floor slab is taken into the precast floor slab erection machine 1, that is, the floor slab 13 is suspended from the chain block 10. Next, the suspended slab 13 is transported to and mounted on the rotary carriage 15, the column 12 is lifted, the precast floor slab erection machine 1 is retracted, the floor slab 13 is rotated 90 degrees by the rotary trolley 15, and the precast floor slab erection machine 1 advancement, landing of the support column 12, lifting of the floor slab 13 by the chain block 10, and installation at a predetermined position.
First, the floor slab 13 is taken into the precast floor slab erection machine 1, that is, the floor slab 13 is suspended from the chain block 10 between the two rails 80 forming the long side of the frame-type movable rack 8. The horizontal beam 9 movably installed along the rail 80 is moved in the direction of the arrow shown in FIG. 5A, and the chain block 10 is moved to the center of the precast floor slab erection machine 1.
[0014]
As shown in FIG. 5 (b), the floor slab 13 suspended from the chain block 10 is transferred to and mounted on the rotary carriage 15. The horizontal beam 9 on which the chain block 10 is suspended is attached to the frame type movable rack 8 as shown in FIG. This is carried out by lowering the floor slab 13 after being advanced to the top of the rotating carriage 15 in the direction of the arrow along the two rails 80 forming the long sides (see FIG. 6C).
[0015]
Subsequently, the floor slab 13 is rotated. At this time, when the dimension in the longitudinal direction of the floor slab 13 is smaller than the distance between the support column 12 and the front leg portion 3 of the portal structure, the hanging bracket of the chain block 10 is used. Since it can be rotated while being suspended by the swivel mechanism, it is not necessary to be mounted on the rotating carriage 15 and rotated. However, when the longitudinal dimension of the floor slab 13 is larger than the distance between the support column 12 and the front leg 3 of the portal structure, as shown in FIG. After mounting and removing from the chain block 10, the strut 12 of the precast floor slab erection machine 1 is pulled up, and the gate-type structure is moved rearward using the railless traveling device 4 to rotate the floor slab 13. A necessary space is secured, and then the floor slab 13 is rotated 90 degrees by the rotating carriage 15 to obtain the state shown in FIG.
[0016]
When the rotation of the floor slab 13 is finished, the portal structure that has been moved backward is advanced to the original position by using the railless traveling device 4, and the column 12 that has been lifted is landed, and then rotated. The raised floor slab 13 is again lifted by the chain block, and as shown in FIG. 7 (f), the existing beam slab is moved further forward along the two rails 80 that form the long sides of the frame type moving rack 8. Is moved to a position where it has been removed, and then moved down along the horizontal beam 9 of the chain block 10 while being finely adjusted in position, and installed at the position indicated by 13 ″ in FIG. 7 (f). The
In FIG. 5, the reference numeral 13 'indicates an existing floor slab. After the floor slab 13 "is installed, the precast floor slab erection machine 1 is moved forward to replace the next floor slab. Do.
[0017]
When the bridge floor slab is replaced, the existing floor slab 13 ′ to be replaced is already removed as shown in FIG. 5A. Accordingly, the precast floor slab erection machine 1 can only be installed in front of it, and in order to install a new floor slab 13 in such a state, the floor slab 13 is greatly extended in front of the precast floor slab erection machine 1. Need to be held. However, if a heavy floor slab is projected forward, the precast floor slab erection machine 1 may lose balance, and measures such as increasing the weight of the precast floor slab erection machine 1 are necessary to prevent this. However, the weight cannot be increased beyond the load bearing capacity of the bridge slab, and there is a strong demand for weight reduction from the viewpoint of transportation.
In the embodiment of the present invention, the column 12 suspended from the front end of the frame type moving rack 8 of the precast floor slab laying machine 1 is placed at the end of the removed floor slab as shown in FIG. The precast floor slab erection machine 1 is stabilized and lightened by being fixed on a certain existing floor slab 13 'or a bridge girder.
[0018]
【The invention's effect】
The following effects can be exhibited by the present invention.
(1) In particular, a suspension device for suspending a floor slab suspended from a horizontal beam of a rectangular frame-type movable rack that is movable along the two rails above the gate-type structure Because it can project greatly in front of the body, hang the precast floor slab directly from the truck directly under the portal structure to the suspension device and transfer it directly to the front of the portal structure to install the floor slab at a predetermined position. be able to.
In addition , the precast floor slab erection machine lacks balance because a suspension device for suspending the floor slab suspended from the transverse beam of the movable rectangular frame-type movable rack projects over the front of the portal structure. This fear is suppressed by the frame-type moving rack drawn out from the gate-type structure and the column suspended at the tip, so that all operations can be performed stably.
Furthermore, in addition to the effect described in (1) above,
( 2 ) Since the trackless traveling device is provided, it can be moved and installed at an arbitrary position, and the floor slab is not damaged by the movement.
(3) By providing two struts at the front end of the rectangular frame-type moving rack, the apparatus reaction force during the installation can be distributed to six locations, so that the load bearing capacity of the existing floor slab can be sufficiently cleared.
(4) Since the precast floor slab erection machine can be configured lightly, even if it is installed on the existing floor slab, there is little impact on the existing floor slab or bridge.
(5) Since the height and width of the precast floor slab erection machine can be reduced to the dimensions that can be loaded on one truck (in the embodiment, the height is 2.4 m, the width is 2.22 m), the floor slab erection machine is also used during transportation. There is no need to disassemble the vehicle and no special permission is required for transportation.
(6) As described in (5) above, the precast floor slab erection machine can be transported to the site by truck without disassembling, and can be lowered by self-propelling by attaching a ramp to the loading platform. It does not require a heavy machine such as a crane for transporting, and does not require assembling work.
(7) When precast slabs are installed, it is possible to finely adjust the position in the direction of the bridge axis and the direction perpendicular to the bridge.
(8) It can be built up to a long floor slab with a width of about 8m by using a rotating carriage.
(9) It is possible to reduce the total cost including transportation cost and assembly / disassembly cost.
(10) Workability is good and the process can be shortened.
(11) Precast floor slabs can be used on all bridges regardless of the bridge type and bridge size because they are within the building limits even during precast slab erection work.
(12) Since the precast floor slab erection machine is self-propelled, it can be easily removed, and it can easily meet the demand for securing bridge traffic in the daytime even during the floor slab replacement work.
[Brief description of the drawings]
FIG. 1 is a perspective view of an embodiment of the present invention during operation.
FIG. 2 is an explanatory diagram showing the configuration of the embodiment of the present invention, the shortening of each member, and the accommodation direction.
FIG. 3 is a perspective view of the embodiment of the present invention during transportation.
FIG. 4 is a schematic explanatory diagram of a two-stage rail type transfer system according to an embodiment of the present invention.
FIG. 5 is an explanatory diagram of the erection operation of the precast slab erection machine according to the embodiment of the present invention.
(A) Installation of floor slab erection machine, (b) Incorporation of floor slab.
FIG. 6 is an explanatory diagram of the erection operation of the precast slab erection machine according to the embodiment of the present invention.
(C) Transfer of floor slab, (d) Mounting of floor slab on rotating carriage and retreat of floor slab erection machine.
FIG. 7 is an explanatory diagram of the erection operation of the precast slab erection machine according to the embodiment of the present invention.
(E) Rotating floor slab erection machine and advancing floor slab erection machine, (f) slab erection.
[Explanation of symbols]
1: Precast floor slab erection machine 2: Frame type frame 3: Leg 4: Non-rail type traveling device 5: Base 6: Rail 6a: Rail lower frame 7: Electric slide type suspension device 7 ', 7 ": Slide Type suspension device 8: frame type moving rack 8a: upper frame 9 of frame type moving rack 9: cross beam 10: chain block 12: support columns 13, 13 ', 13 ": floor slab 14: outrigger 15: rotating carriage
80: Two rails forming the long side of the frame type moving rack W: Wheel

Claims (6)

  1. A portal structure that is held by four legs, four rail- free traveling devices that mount the four legs of the portal structure, and a rectangular frame-shaped frame above the portal structure. Two rails disposed and fixed in the longitudinal direction at the lower part, and a rectangular frame-type movable rack in which the long sides of the two rails are suspended and movable along the rails; A transverse beam that is constructed between two long sides of the frame-type movable rack and is movable in the longitudinal direction of the frame-shaped movable rack; and a suspension device for hanging a floor slab suspended from the transverse beam; A self-propelled precast floor slab erection machine comprising two support columns suspended at the front ends of the two long sides of the frame type movable rack in the same direction.
  2. A portal structure that is held by four legs, four rail- free traveling devices that mount the four legs of the portal structure, and a rectangular frame-shaped frame above the portal structure. Two rails disposed and fixed in the longitudinal direction at the lower part, and a rectangular frame-type movable rack in which the long sides of the two rails are suspended and movable along the rails; A horizontal beam that is constructed between two long sides of the frame-type movable rack and is movable in the longitudinal direction of the frame-shaped movable rack, and a floor slab that is suspended from the horizontal beam and that is movable along the horizontal beam are suspended. A self-propelled precast floor comprising: a suspension device for the above and two struts suspended from the front ends of the two long sides of the frame-type moving rack in the same direction. Plate erection machine.
  3. The portal structure is composed of an upper frame frame and four inverted L-shaped legs, and the frame frame has a structure in which two rectangular tubes are juxtaposed at each short side portion. The horizontal portion of the inverted L-shaped leg is inserted into the part from one side from the right and the other from the left side, so that the interval between the left and right legs can be changed. The self-propelled precast floor slab erection machine according to 2.
  4. 4. The four legs and the support of the portal structure have a sheath tube structure that can be expanded and contracted, and the height of the portal structure can be changed. The self-propelled precast slab erection machine according to any one of the above.
  5. A rectangular frame-type moving rack in which the long sides are suspended from the two rails disposed and fixed at the lower part of the frame-type frame of the gate-type structure and movable along the rails, and the frame type A floor slab is suspended by adopting a two-stage rail transfer system that is constructed between two long sides of a movable rack and is composed of one horizontal beam movable in the longitudinal direction of the frame-shaped movable rack. The self-propelled precast slab erection machine according to any one of claims 1 to 4, wherein a moving range of the hanging device to be moved can be extended to the outside of the portal structure.
  6. A rotary carriage that mounts and rotates a floor slab transferred by a suspension device of a precast slab erection machine is disposed between the support column and a front leg of the portal structure. The self-propelled precast slab erection machine according to any one of 1 to 5 .
JP2003092781A 2003-03-28 2003-03-28 Self-propelled precast slab erection machine Active JP3968579B2 (en)

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CN111335178A (en) * 2020-03-26 2020-06-26 中铁七局集团第三工程有限公司 Small-curve-radius steel box girder bridge girder erection machine and erection construction method

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JP3901657B2 (en) * 2003-03-28 2007-04-04 ピーシー橋梁株式会社 Self-propelled precast slab erection machine
JP4473762B2 (en) * 2005-03-30 2010-06-02 日立造船株式会社 PC slab erection method and PC slab
JP2007182728A (en) * 2006-01-10 2007-07-19 Kajima Corp Construction method of bridge, and side floor slab mounting device for bridge
KR100964155B1 (en) 2008-02-04 2010-06-17 김근택 A precast deck slab of a bridge
JP5319216B2 (en) * 2008-09-08 2013-10-16 三井住友建設株式会社 Bridge girder erection device and bridge girder erection method
JP5507383B2 (en) * 2010-08-04 2014-05-28 東日本旅客鉄道株式会社 Heavy load erection machine and heavy load erection method
JP5823552B2 (en) * 2014-03-10 2015-11-25 株式会社巴コーポレーション Method and apparatus for erection of bridge deck
JP6444226B2 (en) * 2015-03-09 2018-12-26 オリエンタル白石株式会社 Floor slab erection device
CN105162033A (en) * 2015-09-06 2015-12-16 安徽华电工程咨询设计有限公司 Mechanized self-lifting portal crossing frame
JP6793542B2 (en) * 2016-12-26 2020-12-02 株式会社Ihiインフラシステム Floor slab erection method and floor slab erection equipment
JP6483177B2 (en) * 2017-03-17 2019-03-13 株式会社Ihiインフラ建設 Floor slab replacement device and installation method of floor slab replacement device

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