JP2015169029A - Laying method of bridge floor plate and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laying method of a bridge floor plate which can contribute to the improvement of installation efficiency and safety, and a device.SOLUTION: A slide beam 11 which slides in an advance direction is arranged at a transportation bogie 12 traveling on rails 1 which are laid on a bridge girder 2. A wheeled movable leg 13 which vertically moves is attached to the vicinity of a tip of the slide beam 11, and a suspension device 14 which suspends floor plates 4 is arranged at an intermediate part of the seal beam 11. The floor plates 4 are temporarily placed immediately in front of the transportation bogie 12, the slide beam 11 is extended up to a length which straddles the floor plates 4, the wheeled movable part 13 is extended up to the rails 1 downwardly, and the slide beam 11 is supported. The floor plates 4 are suspended by the suspension device 14, and forwardly moved along the rails 1, and the floor plates 4 are sequentially laid from a remote side. After the floor plates 4 are unloaded, the wheeled movable leg 13 is pulled up, the slide beam 11 is withdrawn to the transportation bogie 12 side, and the transportation bogie 12 is made to retreat up to a floor-plate suspension position.

Description

  The present invention relates to a construction method and a transportation device for installing a composite floor slab for a steel bridge on a bridge girder.

  Conventionally, in the construction of steel bridges, in order to install synthetic slabs and precast slabs on the bridge girders that have already been installed, various transport devices and construction methods for transporting these slabs to the installation site have been developed and put into practical use. It has been.

  These construction methods are effective construction methods that are adopted when it is difficult to secure the installation location of the crane for unloading the slabs onto the bridge girder or there are restrictions such as traffic restrictions.

  As a conventional construction method, a transportation device that hangs a floor slab unloaded at one end of a bridge girder that has already been installed is placed on a rail temporarily placed on the installed floor slab, and then the suspended floor slab is installed. Contrary to the method of transporting to the specified position adjacent to the finished floor slab, unloading and installing it, the transport device moves backward on the rail and returns to the next unloaded floor slab. There is a method in which the floor slab suspended in the device is unloaded and installed on the side closest to the farthest end of the bridge girder, and then the transport device moves backward to return to the next unloaded floor slab.

  Since the former method moves forward while installing the floor slab in front of the transport device, it moves forward on the installed floor slab and then moves backward to hang the next floor slab. Since it moves on the installed floor slab again, there is an advantage that the moving distance is shortened.

  However, since the transport device moves over the installed floor slab, there is a concern of damaging the floor slab, and the rail for the transport device installed on the floor slab is installed until the installation of the entire floor slab is completed. Therefore, the process of removing the rails after the installation of all floor slabs is required.

  On the other hand, in the latter method, the transport device moves forward to transport the floor slab to the installation location, and after the installation, the transport device moves backward to the position where the next floor slab is unloaded. Become. However, unlike the former method, the transport device does not get on the installed floor slab, so there is no fear of damaging the floor slab, and the rail in the section where the floor slab is installed is removed each time the floor slab is installed. So it is efficient.

The present invention is directed to the latter method described above, and relates to an erection method and a conveying device in a method in which a floor slab is installed from the farthest end side of a bridge girder by a conveying device.
For example, Patent Documents 1 to 5 are known as prior arts related to a floor slab erection method and a transportation device.

The inventions described in Patent Document 1 and Patent Document 2 are such that a heavy and long floor slab is suspended in a frame of a transport device and unloaded at a predetermined place to be installed. It is rotated 90 degrees.
In the invention described in Patent Document 3, the suspended floor slab is installed at a predetermined position by a conveying device having a column interval wider than the floor slab without rotating.

  The inventions described in Patent Documents 1 to 3 are applied to floor slabs that are long in the direction orthogonal to the bridge axis but short in the direction of the bridge axis, but the invention of Patent Document 4 is only in the direction orthogonal to the bridge axis. It is for transporting large slabs with large dimensions in the direction of the bridge axis.

  The invention described in Patent Document 5 is the same as the invention described in Patent Document 1 to Patent Document 3 in that the floor slab is rotated in the direction orthogonal to the bridge axis but the dimension in the bridge axis direction is short. Instead of hanging the slab, temporarily place it on a turntable installed separately on the bridge girder in front of the predetermined installation position, rotate it 90 degrees, lift it again, and unload it to the predetermined installation position To do. By separating the rotation process from the transportation device, the transportation device is made smaller and lighter, and assembly and disassembly is not required during transportation.

Japanese Patent Publication No. 2006-028881 JP 2005-307684 A JP 2001-064915 A JP 2003-074018 A Japanese Patent Laid-Open No. 2004-300688

  In the conventional construction method, a rail for a transport device is laid on a plurality of bridge bridge girders and a frame with wheels is built on the rail, so when hanging a floor slab wider than the distance between bridge girders to the transport device, If the floor slab is not rotated 90 degrees, there is a restriction that the floor slab cannot be taken into the frame, and it is necessary to rotate the floor slab again 90 degrees immediately before unloading the floor slab to the position where the floor slab should be installed. It was bad and accompanied by the dangers associated with rotating work.

  There is also a method that does not rotate the floor slab, but in that case, it is necessary to make the frame width of the transport device wider than the length of the floor slab, which makes the apparatus very large.

  Since the devices described in Patent Document 1 and Patent Document 2 are large-scale and rotate in an unstable state suspended in the air, sufficient safety measures are required.

  The invention described in Patent Document 3 is high in safety because there is no rotation process, but the frame of the conveying device is larger than the bridge girder interval.

  The invention described in Patent Document 4 is highly safe because the floor slab does not rotate, but when the transport device is pulled back after the floor slab is installed, a mechanism is required for the rear wheels to ride on the installed floor slab. Therefore, the apparatus is complicated.

  The invention described in Patent Document 5 has a problem in terms of work efficiency because not only a turntable is required separately but also the rotation of the floor slab comes after the wholesaler has been wholesaled, so that setup change is also necessary. .

  In the inventions described in Patent Document 1 to Patent Document 5, problems remain such that the transporting device is large or complicated, and it is necessary to ensure safety in the rotation process.

  The present invention solves the problems in the conventional floor slab erection method as described above, and contributes to the improvement of the installation efficiency and safety of the floor slab, for installing the steel slab floor slab on the bridge girder. An erection method and a transportation device are provided.

The construction method of the bridge deck of the present invention is as follows:
(A) a step of temporarily placing a floor slab immediately before a wheeled carriage that runs on a rail temporarily installed on a bridge girder;
(B) Extending the slide beam provided on the transport cart to a length straddling the floor slab in the traveling direction of the transport cart, and extending a movable leg with a wheel attached to the tip of the slide beam downward to the rail to extend the slide beam The process of making the legs to support,
(C) Thereafter, the step of suspending the floor slab on the slide beam using a lifting device provided in the middle of the slide beam,
(D) In this state, after the carriage is moved forward along the rail to a predetermined position on the bridge girder where the floor slab is to be installed, the floor slab is unloaded from the slide beam and installed. Process,
(E) Thereafter, the step of pulling up the wheeled movable leg and pulling the slide beam toward the transporting carriage,
(F) In this state, the transport cart returns to the floor slab suspension position by moving backward on the rail;
And the above process is repeated as many times as necessary.

  In addition, about the rail of a part which overlaps with the floor slab installed in the predetermined position on a bridge girder, it can remove after raising a movable leg with a wheel upwards after unloading a floor slab.

  A transport device for a bridge floor slab according to the present invention is a transport device used in the above-described construction method, and includes a transport cart with wheels that travels on a rail temporarily installed on a bridge girder, and a transport cart provided on the transport cart. A slide beam that slides in the traveling direction; a movable leg with a wheel that is attached to the tip of the slide beam and moves up and down; and a suspension device that is provided in the middle of the slide beam and suspends the floor slab. It is a feature.

The present invention is configured as described above, and the following effects are obtained.
(1) Since the floor slab is hung on the transport device in the original orientation installed on the bridge girder, a dangerous rotating process is unnecessary, and the safety of the slab erection is improved.
(2) Since the floor slab does not need to be rotated, the erection efficiency is improved and the construction period is shortened.
(3) Since an apparatus necessary for rotating the slab is unnecessary, the apparatus can be manufactured simply and inexpensively.
(4) The carrying device is compact and easy to assemble and disassemble, making it easy to carry.
(5) Since the transport device does not pass over the installed floor slab, there is no fear of damaging the floor slab.
(6) The temporary rail in the section where the floor slab is installed is efficient because it is removed each time after the floor slab is installed.
(7) Since the floor slab is unloaded at the fixed position of the bridge girder, it can be operated with a small crane, which reduces the cost.
(8) There is no need to regulate traffic because the floor slabs can be built inside the suspension scaffolds that are installed in advance over the entire length or required range of the bridge girder.

BRIEF DESCRIPTION OF THE DRAWINGS It is the side view which shows one Embodiment of the conveying apparatus of the bridge floor slab which concerns on this invention schematically, and shows the state by which the floor slab was temporarily placed immediately before the conveyance trolley placed on the rail of the bridge girder. is there. FIG. 2 is a side view showing a state in which the slide beam is slid over the floor slab and the movable leg extends downward to the rail in the embodiment of FIG. 1. In the embodiment of FIG. 1, the floor is suspended with the movable leg supporting the slide beam, and the transport device moves forward on the rail. In the embodiment of FIG. 1, it is a side view which shows the state immediately after the conveying apparatus arrived at the installation position of the floor slab and unloaded the floor slab. FIG. 2 is a side view showing a state in which the lifting device and the movable leg are pulled up after the transport device has installed the floor slab at a predetermined position in the embodiment of FIG. 1. In embodiment of FIG. 1, it is a side view which shows a mode just before a conveying apparatus reversely moves on a rail toward the position which suspends the next floor slab. In this invention, it is the figure which showed the state of the installed floor slab and the floor slab just after installation, (a) A sectional view of FIG. 6, (b) is the B sectional view of FIG. 7 (a), (c ) Is a form of a separate floor slab in the cross-sectional view of FIG. It is the expanded side view which showed one Embodiment of the bridge floor slab conveying apparatus which concerns on this invention, (a) is a cross-sectional view in (a) of FIG. 9, (b) is a cross-sectional view in (c) of FIG. is there. 9A is a plan view of the embodiment of FIG. 8, and FIG. 9A is a cross-sectional view of FIG. 8A, and FIG. 9B is a plan view showing a state in which the slide beam is slid and extended in FIG. . BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a method for attaching a wheel portion and a rail of a bridge floor slab conveying device according to the present invention, wherein (a) is a sectional view, (b) is a sectional view of (a), (c). FIG. 11 is a cross-sectional view showing an embodiment different from FIG.

  Hereinafter, the present invention will be described with reference to the accompanying drawings. In addition, this invention is not limited to embodiment shown below.

  An embodiment of the present invention will be described with reference to FIGS. First, as shown in FIG. 1, a bridge girder 2 on which a rail 1 is temporarily installed and a transport device 10 including a transport carriage 12 having fixed legs 12a and 12a with wheels 12b or a drive device 12c and a slide beam 11 are installed. The floor slab 4 is temporarily placed by the crane 3 in front of the transport carriage 12.

  Next, as shown in FIG. 2, the slide beam 11 for suspending the floor slab 4 is extended from the transport carriage 12 of the transport device 10 to a length straddling the floor slab 4 and attached to the tip of the slide beam 11. The wheeled movable leg 13 is extended downward to the rail 1 to support the slide beam 11.

  A jack may be used for expansion and contraction of the movable leg 13 with wheels, and a counterweight 11a is provided on the opposite side of the movable leg 13 with wheels to provide a balance when the slide beam 11 is extended. In addition, when making a conveying apparatus self-propelled, you may use the generator for drive devices 12c also as a counterweight.

  Then, as shown in FIG. 3, the floor slab 4 is suspended by the suspension devices 14 and 14 attached to the slide beam 11, and is transported to a predetermined position (FIG. 4) where the floor slab 4 should be installed. The apparatus 10 is moved forward (in the direction of the arrow) along the rail 1, and the floor slab 4 is unloaded and removed from the suspension apparatuses 14 and 14 as shown in FIG. The wheeled movable leg 13 is pulled upward.

  Then, as shown in FIG. 6, the transport device 10 is moved backward (in the direction of the arrow) to the position where the next floor slab 4 is suspended in a state where the slide beam 11 is pulled into the transport cart 12 side.

  FIG. 7 is a cross-sectional view of FIG. 6 showing the state of the installed floor slab 4a and the floor slab 4 immediately after installation, and the wheeled movable leg 13 immediately after unloading the floor slab 4 is installed. Since it can put in the clearance gap 5 of the baseplate 30 of the floor slab 4a, the installed floor slab 4a and the floor slab 4 just after installation can be stuck.

  FIGS. 8 and 9 show an example of a specific form of the transporting device 10, and FIGS. 8B and 9A are a cross-sectional view and a cross-sectional view, respectively, of FIG. 8A. The slide beam 11 slides back and forth on the transport carriage 12 by the guides 11b and 11b, and the movable leg 13 is moved up and down by the jack 13a.

  In addition, the method of moving the conveying apparatus 10 on the rail 1 is not only a method using the driving device 12c, but also a method of winding a wire with a winch and moving it back and forth (not shown).

  FIGS. 10A to 10C show an example of a method for temporarily fixing the rail 1 installed on the bridge girder 2. 10 (a) to 10 (b) show that rail receiving plates 1a and 1a to which rib plates 1b and 1b are fixed by welding are placed on both sides of studs 20 and 20, and bolts 1c and 1c using studs 20 and 20 are shown. In this method, the rail 1 is temporarily fixed to the upper flange of the bridge girder 2.

  In FIG. 10C, the studs 20 and 20 are screwed, the female screws 20a and 20a are welded to the upper flange of the bridge girder 2, and the rail receiving plate 1a is attached to the bolts 20b and 20b using the female screws 20a and 20a. It is a method to stop.

  Moreover, the rail 1 of the part which overlaps with the installed floor slab 4 is unnecessary, and is removed. The state of the floor slab 4 after installation is, for example, as shown in FIG. 7B, a bottom plate 30 (material is a steel plate or the like) and a reinforcing bar truss 31 attached to the bottom plate 30, or as shown in FIG. 7C. A part of the bottom plate 30 that is made of CT section steel 31a and overlaps the bridge girder 2 is an opening.

  Accordingly, as shown in FIG. 7B or FIG. 7C, there is a space 40 formed by the rebar truss 31 or the CT section 31a and the upper flange of the bridge girder 2, so that the floor slab of the rail 1 4 can be extracted in the axial direction of the bridge girder 2, and if the bolts 1c, 1c or 20b, 20b temporarily fixing the rail 1 are removed, the rail 1 in this portion can be easily removed.

FIG. 7A shows a plan view of the state in which the floor slab 4 and the installed floor slab 4 a have removed the portion of the rail 1 that overlaps the bridge girder 2.
The above steps are repeated as many times as necessary to spread the floor slab 4.

DESCRIPTION OF SYMBOLS 1 ... Rail 1a ... Rail receiving plate 1b ... Rib plate 1c ... Bolt 2 ... Bridge girder 3 ... Crane 4 ... Floor slab 4a ... Installed floor slab 5 ... Gap 10 ... Transport device 11 ... Slide beam 11a ... Counter weight 11b ... Slide beam Guide 12 ... Carriage truck 12a ... Fixed leg 12b ... Wheel 12c ... Drive unit 13 ... Movable leg 13a ... Jack 14 ... Suspension device 20 ... Stud 20a ... Female screw 20b ... Bolt 30 ... Bottom plate 31 ... Reinforcing bar truss 31a ... CT Shape steel, etc. 40 ... space

A transport device for a bridge slab according to the present invention is a transport device used in the above-described construction method, and is provided on a rail temporarily provided on a bridge girder, a wheeled transport cart that travels on the rail, and the transport cart. A slide beam that slides in the traveling direction of the transport carriage, a movable leg that is attached to the tip of the slide beam and moves up and down, and a suspension device that is provided in the middle of the slide beam and suspends the floor slab A rail receiving plate having a rib plate welded and fixed to both sides of the stud protruding from the upper flange of the bridge girder, and the rail receiving plate is bolted to the rib plate with a bolt. The rail is temporarily fixed to the rail, and the rail is bolted between the rib plates with bolts using the studs, whereby the upper flange of the bridge girder is fastened. And it is characterized in that it is temporarily fixed to.
Also, a rail temporarily installed on the bridge girder, a wheeled carriage that travels on the rail, a slide beam that is provided on the carriage and slides in the traveling direction of the carriage, and is attached to the tip of the slide beam A movable leg with wheels that move up and down, and a suspension device that is provided in the middle of the slide beam for suspending the floor slab, and welds a female screw for projecting a stud by screwing into the upper flange of the bridge girder The rail is temporarily fixed to the upper flange of the bridge girder by fixing the rail receiving plate to the rail by welding and fastening the rail receiving plate to the female screw with a bolt. To do.

Claims (2)

  A floor slab is temporarily placed immediately before a wheeled carriage that runs on a rail temporarily installed on a bridge girder, and a slide beam provided on the carriage is extended to a length straddling the floor slab in the traveling direction of the carriage, and the slide A wheeled leg attached to the tip of the beam is extended downward to the rail to support the slide beam, and then the floor slab is attached to the slide beam using a suspension device provided in the middle of the slide beam. After the carriage is moved forward along the rail to a predetermined position on the bridge girder where the floor slab should be installed in this state, the floor slab is unloaded from the slide beam and installed. Thereafter, the movable leg with the wheel is pulled up, the slide beam is pulled to the transport carriage side, and in this state, the transport carriage moves back on the rail and returns to the floor staking position. Erection process of the bridge deck and repeating necessary times the above steps.   A wheeled carriage that runs on rails temporarily installed on the bridge girder, a slide beam that is provided on the carriage and slides in the traveling direction of the carriage, and a movable wheel that is attached to the tip of the slide beam and moves up and down. A bridge floor slab transporter comprising a leg and a suspension device provided in the middle of the slide beam for suspending the floor slab.

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