JP2010037727A - Equipment and method for erecting precast pc plate for floor slab - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the operations of movement, swing and erection of a precast PC plate for a floor slab performed in a constantly stable state by simplifying equipment for erection and making the whole equipment light. <P>SOLUTION: This equipment includes: a rail 23 for a carrier truck, installed in the direction of a bridge axis on the existing floor slab 21 erected on a bridge girder 20; a rail 24 for an erection machine, installed in parallel with the rail 23 outside the rail 23; a truck for conveying the precast PC plate for the floor slab, which can move on the rail 23; and an erection machine 35 capable of moving on the rail for the erection machine. The truck for conveying the precast PC plate for the floor slab is composed of a truck 25 with a revolving frame, and an end supporting truck 26. The erection machine 35 is constituted internally as a gate type though which the truck for conveying the precast PC plate for the floor slab, having the precast PC plate for the floor slab mounted in the direction of the bridge axis, can pass. A cantilevered horizontal beam 40 is protrusively provided on the side of an erection position, and equipped with a suspension device which lifts/lowers the precast PC plate for the floor slab by suspending it. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention conveys the precast PC board for floor slabs to the desired erection position on the bridge girder in the direction of the bridge axis, turns it to the desired erection angle before the erection position, and then moves it to the erection position and installs it. The present invention relates to a precast PC plate erection device for floor slab and a method thereof.

    In recent years, PC (prestressed concrete) floor slabs are often used for bridge slabs using steel girders, and precast PC plates for floor slabs are arranged side by side, especially in places where rapid construction is desired. A method of building a floor slab by erection is adopted.

  Generally, precast PC boards for floor slabs are often installed from under the girder using a truck crane. However, in places such as rivers and crossing roads where the truck crane cannot be approached under the girder, it is more dedicated than the bridge. It is erected using an erection device.

  As shown in FIGS. 8 to 10, the conventional erection apparatus lays a rail 3 on an existing floor slab 1 installed on a girder, and movably mounts a transport carriage 4 and an erection machine 5 thereon, The transport cart 4 is mounted with the precast PC plate 2 for floor slab to be newly installed in a direction orthogonal to the bridge axis direction and transported to a position before the installation machine 5.

  The framing machine 5 is provided with a swivel base 7 on a traveling carriage 6, and has a cantilever type horizontal beam 8 for suspension that protrudes from the swivel base 7, and a suspension device is attached to the tip of the horizontal beam 8. 9 is provided.

  When laying the precast PC plate for floor slab, as shown in FIG. 8, the laying machine 5 is moved to the tip of the existing floor slab 1 and the precast PC plate 2 for floor slab is placed on the carriage 4. The transport cart 6 and the swivel mount 7 are operated so that the suspension device 9 comes on the precast PC plate 2 for floor slabs, as shown in FIG. The floor cast precast PC plate 2 is lifted by a lifting device 9. In this state, the swivel base 7 is swung so that the precast PC plate 2 for floor slab is swung from the rear side of the laying machine 5 to the front side, that is, the erection position side, and the travel base 6 is moved as shown in FIG. Then, the precast PC plate 2 for floor slab is moved to the erection position and suspended.

In the conventional apparatus, when the precast PC plate 2 for floor slab is supported by the swivel base 7 and swiveled, the precast PC plate 2 for floor slab protrudes to the side of the existing floor slab 1 so that stability is maintained. In some cases, there is an obstacle such as a building near the existing floor slab 1 and there is not enough space for turning. As an attempt to solve this problem, as in the construction machine 10 shown in FIGS. 11 and 12, the upper portion of the traveling carriage 11 that protrudes from the upper end of the support member 12 erected on one side of the traveling carriage 11. A frame 12 is provided, a suspension rail 13 directed in the direction of the bridge axis is installed on the lower surface thereof, and a trolley 15 supported by the suspension rail 13 is used to support a suspension device 16. The floor slab precast PC plate 2 that has been transported is lifted by the lifting device 16, and the floor slab precast PC plate 2 lifted at that position is swung in the direction of the bridge axis. An apparatus has been developed that is moved to the opposite side of the erection machine 10 and swung in a direction perpendicular to the rear bridge axis direction and then suspended at the erection position (Patent Document 1).
JP 2005-307684 A

  In the above-mentioned conventional apparatus, the construction machine is swung with the precast PC board for floor slab being lifted or swung in the state of being lifted, and moved from the near side position of the construction machine to the construction position side. Is moved to the erection position side of the erection machine and swiveled again, so that the structure of the erection machine becomes complicated and the manufacturing cost is high. Moreover, in order to ensure stability, it is necessary to increase the weight, a large load is applied to the existing floor slab, and movement is difficult. Furthermore, there is a problem that the reaction force of the carriage becomes non-uniform and the stability is deteriorated even during the lifting (loading), turning, moving, and erection work of the precast PC board for floor slab by the erection machine. It was.

  In view of such a conventional problem, the present invention simplifies the apparatus for erection, makes the entire apparatus lighter, and keeps the work of moving, turning, and erection of the precast PC plate for floor slabs constantly. It is made for the purpose of providing the precast PC board erection apparatus for floor slabs made, and its erection method.

  The feature of the invention described in claim 1 for solving the conventional problems as described above and achieving the intended purpose is that the transport installed in the direction of the bridge axis on the existing floor slab installed on the bridge girder. A rail for a carriage, a rail for an erection machine installed in parallel with the outer side of the rail for the carriage, a precast PC board carriage for a floor slab that can move on the rail for the carriage, and the rail for the erection machine The floor slab precast PC board carriage is provided with a slewing base that supports a central portion of the floor slab precast PC board and that can turn the slab horizontally. And a pair of end support carts that support both ends of the precast PC plate for floor slabs facing the bridge axis direction, and the construction machine straddles over the rails for the transport cart It can move on the rail for the construction machine And a portal pedestal through which the precast PC board transportation carriage for floor slabs, in which the precast PC board for floor slabs is mounted in the direction of the bridge axis, and the precast PC board for floor slab installation from the top of the portal gantry A cantilever type horizontal beam that protrudes in the direction of the bridge axis toward the section side, and a suspension device that is supported by the protruding part of the cantilever type horizontal beam and lifts and lowers the precast PC board for floor slab The precast PC plate for floor slab that has been swung in a direction crossing the bridge axis on the carriage with the swivel platform is lifted by the suspension device, and the portal frame can be moved to be transported to the installation position. It is in the precast PC board erection device for floor slabs.

  A feature of the invention described in claim 2 is that the precast PC board erection device for floor slabs according to claim 1 is used, and the precast PC board for floor slabs is placed on the precast PC board transport carriage for floor slabs composed of the three carriages. The PC board is mounted in the direction of the bridge axis, and this is passed through the portal frame and moved from the laying machine to the precast PC board installation position side for the floor slab. It is supported only on the swivel of the car with swivel, and the swivel is used to turn the precast PC plate for floor slab to a desired angle that intersects the bridge axis direction, and then the portal frame of the installation machine is moved. The suspension device is moved onto the precast PC plate for the floor slab, the precast PC plate for the floor slab is lifted by the suspension device, and the gate-type gantry is moved until the precast PC plate for the floor slab reaches the desired installation position. Move In the floor slab for precast PC plate construction method to unload hanging for the floor slab precast PC board at the set position.

  The invention according to claim 3 is characterized in that, in addition to the structure of claim 2, temporary reinforcing steel material that resists the cross-sectional force generated by the weight of the precast PC plate for floor slab on the upper surface or the lower surface of the precast PC plate for floor slab In this state, the process from the mounting to the precast PC board conveying cart for floor slab to the installation is performed.

  In the present invention, the floor slab precast PC board conveying carriage is constituted by a car with a swivel base that supports the central portion of the floor cast precast PC board and a pair of end support carriages that support both ends, The precast PC board for the slab is transported on the existing floor slab vertically by these carts, and the precast PC board for the floor slab is swung while being supported on the carriage with the swivel platform on the rail. On the existing floor slab, it can be safely performed in a stable state without protruding to the outside.

  Further, the erection machine is formed in a gate shape through which the precast PC board for floor slab mounted on the carriage can pass through, and can be moved on the rail installed outside the rail for the precast PC board conveying carriage for floor slab. By doing in this way, work can be performed separately from the movement work of the precast PC board conveying carriage for floor slabs, and workability is improved.

  In addition, the precast PC board transportation cart for floor slabs is used for transporting the precast PC board for floor slabs in the direction of the bridge axis because it uses three carts. Therefore, the work space is reduced, and other work equipments are left on the floor slab, and the precast PC board for floor slab can be installed while the other work is progressed, so that the work efficiency is improved.

  Furthermore, since the three trolleys are used to transport the precast PC board for floor slabs, the end support trolleys in particular may have a simple structure, and the erection machine can move and floor itself. Since it is only necessary to be able to lift and lower the precast PC plate for the plate, the configuration of each required device is simplified and the weight is reduced, and the cost is reduced as a whole, and the load applied to the temporarily placed existing floor slab Becomes smaller.

  In addition, the precast floor slab precast is fixed in a state in which a temporary reinforcing steel material that resists the cross-sectional force generated by the weight of the precast PC plate for floor slab is attached to the upper or lower surface of the precast PC plate for floor slab. By performing the steps from mounting on the PC board conveying cart to erection, the work can be performed in a safe state against the cross-sectional force of the precast PC board for floor slab generated during the work.

  Next, embodiments of the present invention will be described based on the examples shown in FIGS. 1 to 3 show a simplified overall configuration of an apparatus according to the present invention. In the figure, reference numeral 20 is a steel girder, and 21 is an existing floor slab constructed by temporarily placing a precast PC plate 22 for floor slab. On this existing floor slab 21, rails 23 and 23 for conveying carts are laid in the direction of the bridge axis, and rails 24 and 24 for construction machines are laid on the outside of the rails in parallel with the rails.

  On the transport carriage rails 23, 23, floor slab precast PC board transport carriages 25, 26, 26, which are a set of three, are movably mounted. Each of these carts is mounted with a precast PC plate 22 for floor slabs so that it can be moved in the direction of the bridge axis. End support trolleys 26, 26 are arranged on the side.

  In the carriage 25 with a swivel base, a swivel base 28 that can turn in a horizontal direction is placed on a traveling base 27 having wheels at the bottom, and the center of the precast PC plate 22 for floor slabs is placed on the upper surface thereof via a pillow material 29. The partial lower surface is supported.

  The end support carriages 26 and 26 are arranged in front of and behind the carriage 25 with swivel carriage, and the lower surfaces of both end portions of the precast PC plate 22 for floor slabs are supported on the loading platform 30 on the upper surface via pillows 31. It has become so. Although not shown in the figure, the pillow 31 is provided with an upward jack, and the bottom of the precast PC plate 22 for floor slab is loaded via the jack.

  A construction machine 35 is movably mounted on the construction machine rails 24, 24. This erection machine 35 has a gate-type gantry 36 that can move on the rails 24, 24. The gate-type gantry 36 includes a pair of gate-shaped structures 37 and 37 formed in a gate shape by the cross beams 37a and legs 37b and 37b integrated under both ends thereof, and the top of the cross beams 37a and 37a. And a pair of longitudinal beams 38, 38, which are fixed to each other, and are provided with traveling wheels 39 loaded on rails at the lower ends of the legs 37b.

  The portal frame 35 is formed in such a size that it can pass through the portal frame in a state in which the precast PC plate 22 for floor slabs on the carts 25, 26, 26 described above is mounted.

  Cantilever type horizontal beams 40 and 40 are projected from the gate-type gantry 35 toward the precast PC board new erection part side of the floor slab. The horizontal beam 40 is configured such that the above-described vertical beam 38 is formed longer than the interval between the ceiling horizontal beams 37a and 37a, and the tip of the horizontal beam 40 protrudes toward the new installation portion side.

  Suspension devices 45 and 45 are supported at the front ends of the horizontal beams 40 and 40. The suspension devices 45 and 45 are for lifting and lowering the suspension member 46 that hangs downward from them. For example, an electric wire hoisting machine, a chain block, and a hydraulic cylinder can be used. A suspension fitting 47 is connected to the lower end of the suspension member 46.

  Next, a method of laying the precast PC plate 22 for floor slabs using the above-described precast PC plate laying device for floor slabs will be described with reference to FIGS. 1 and 4 to 7.

  As shown in FIG. 1, the precast PC plate 22 for floor slabs to be newly installed has a central portion on the swivel-equipped carriage 25 with the temporary reinforcing material 50 made of H-shaped steel fixed to the upper surface thereof. Is supported on the end support carriages 26, 26, and the floor slab 21 is transported to the erection position side of the floor slab end with the transport carriage rails 23, 23 facing the bridge axis direction. At this time, the laying machine 35 is kept waiting at a position that is at least the length of the precast PC plate 22 for floor slabs from the laying position.

  As shown in FIG. 4, the precast PC plate 22 for floor slab transported in the state of being mounted on the carriages 25, 26, 26 is passed through the portal shape of the waiting erection machine 35 to the erection position side. Move. Thereafter, the support of the precast PC plate 22 for floor slabs by the both-end support carts 26, 26 is released. This operation is performed by, for example, shrinking the jack between the pillow 31 and the floor slab precast PC board 22 to release the loading state of the floor slab precast PC board.

  Next, as shown in FIG. 5, the turntable 28 of the turntable-equipped carriage 25 is turned to turn the precast PC plate 22 for floor slabs until the installation direction intersects the bridge axis direction. This turning may be performed by installing an electric turning drive mechanism on the turntable 25, and when the turning drive mechanism is not provided, the floor precast PC plate 22 is turned manually.

  Next, as shown in FIG. 6, the suspending device 45 of the horizontal beam 40 is moved to a position on the precast PC plate 22 for floor slab by moving the laying machine 35 to a position before the precast PC plate 22 for floor slab. Next, the suspension material 46 is lowered and fixed to the temporary reinforcing material 50 attached to the floor slab precast PC plate 22 by the suspension metal fitting 47 and lifted, and the floor slab precast PC plate 22 is placed on the carriage 25 with a swivel base. To the construction machine 35.

  Thereafter, as shown in FIG. 7, the laying machine 35 is moved to the erection position side, and the floor cast precast PC plate 22 is moved to the erection position. Subsequently, the precast PC board 22 for floor slabs is suspended by the suspension device 45 and installed at a specified position. The movement of the erection machine 35 is made across the trolleys 25, 26, 26. During the movement and erection of the precast PC plate 22 for floor slab by the erection machine 35, the trolleys 25, 26 are shown in FIG. Then, the transport carriage rails 23, 23 are moved in the return direction to prepare for the next floor slab precast PC board transport operation. After the construction work of the precast PC plate 22 for floor slabs is completed, the laying machine 35 moves a distance equal to or longer than the length of the precast PC plate for floor slab transported next from the position in the return direction. Prepare for work.

  In addition, in the Example mentioned above, the case where the jack was attached to the pillow material as a system which cancels | releases the precast PC board edge part support for floor slabs by the edge part support trolley 26, and supports only the trolley | bogie 25 with a turntable is shown. However, the loading state with respect to the end support carriage 26 may be canceled by allowing the swivel of the swivel-equipped carriage 25 to be raised and lowered with a jack and raising the precast PC plate for floor slab with the jack. .

It is a side view which shows schematic structure of the apparatus based on this invention. It is a top view same as the above. It is an enlarged front view same as the above. It is a side view in the state where the precast PC board for floor slabs in the method using the device shown in FIG. It is a side view of the state which made the precast PC board for floor slabs face in the direction at the time of erection. It is a side view of the state which unloaded the precast PC board for floor slabs to the construction machine. It is a side view of the state which has built the precast PC board for floor slabs. It is a side view which shows an example of the conventional precast PC board erection apparatus for floor slabs, and shows the state which loaded the erection machine. It is a side view which shows the turning state by a construction machine same as the above. It is a side view which shows the construction state same as the above. It is a front view which shows the other conventional construction machine. FIG.

Explanation of symbols

20 Steel Girder 21 Existing Floor Slab 22 Precast PC Plate for Floor Slab 23 Rail for Carriage 24 Rail for Construction Machine 25 Carriage with Swivel Platform 26 Carriage for End Support 27 Traverse 28 Swivel Platform 29 Pillow Material 30 Loading Base 31 Pillow Material 35 Construction Machine 36 Gate-type Base 37 Gate-type Structure 37a Ceiling Horizontal Beam 37b Leg 38 Vertical Beam 39 Traveling Wheel 40 Cantilevered Horizontal Beam 45 Lifting Device 46 Hanging Material 47 Hanging Bracket 50 Temporary Reinforcement Material

Claims (3)

A rail for a transport carriage installed on an existing floor slab installed on a bridge girder in the direction of the bridge axis, a rail for a construction machine installed in parallel to the outside of the rail for the transport carriage, and the rail for the transport carriage It has a precast PC board carriage for floor slab that can move on, and an erection machine that can move on the erection rail.
The floor slab precast PC board transporting carriage supports the central part of the floor slab precast PC board, and is provided with a car with a swivel that has a swivel that can be turned in a horizontal direction, and is directed in the bridge axis direction. It is composed of a pair of end support carts that support both ends of the precast PC plate for floor slabs,
The precast PC for floor slab, which can move on the rail for the construction machine across the rail for the carriage, and has the precast PC plate for floor slab mounted in the direction of the bridge axis. A gate-type pedestal through which a plate carriage can pass, a cantilevered horizontal beam projecting in the direction of the bridge axis from the top of the gate-type pedestal toward the precast PC plate erection side of the floor slab, Is supported by the projecting portion of, and is composed of a lifting device that lifts and lowers a precast PC board for floor slab,
A floor slab that allows a precast PC plate for a floor slab in a state of being swung in a direction intersecting with a bridge axis on the carriage with a swivel to be lifted by the suspension device and moved to a laying position by moving a gate-type frame. Precast PC board erection device.   Using the precast PC plate erection device for floor slabs according to claim 1, the precast PC plate for floor slabs is mounted on the floor cast precast PC plate conveyance carriage composed of the three carts in the direction of the bridge axis. Then, this is passed through the portal frame and moved from the erection machine to the floor precast PC plate erection position side, after which the floor precast PC plate is supported only on the swivel of the carriage with swivel And turn the precast PC plate for floor slabs to a desired angle intersecting the bridge axis direction by the swivel, and then move the portal frame of the erection machine to the precast PC plate for floor slabs The suspension device is moved, the floor cast precast PC plate is lifted by the suspension device, the gate-type frame is moved until the floor cast precast PC plate reaches a desired installation position, and the floor plate is used at the installation position. Precast P Precast PC plate construction method for the deck down hanging plate.   In the state where the temporary reinforcing steel material that opposes the cross-sectional force generated by the weight of the precast PC plate for floor slab is attached to the upper surface or the lower surface of the precast PC plate for floor slab, and fixed to the precast PC plate carriage for floor slab The precast PC board erection method for floor slabs according to claim 2, wherein the steps from mounting to installation are performed.

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