JP4551037B2 - Large-scale PC slab erection method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a construction method and apparatus for a large-scale PC floor slab.
[0002]
[Prior art]
Conventionally, as a large-scale precast PC floor slab installed on a road bridge, a floor slab having a full width in the bridge width direction but a maximum dimension of about 2 m in the bridge axis direction has been installed. Such a conventional large-scale PC floor slab has been installed using an installation apparatus as shown in FIGS. 18 is a plan view, FIG. 19 is a front view, and FIG. 20 is a side view. In this construction device, four traveling wheels 122 and 123 are placed on a rail 121 laid on a bridge surface, a frame 124 is constructed thereon, a turning device 128 is placed on the frame 124, and the turning device 128 is The balanced turning beam 125 is turned. A floor slab 94 having a total width of about 2 m in the direction of the bridge axis, which has been transported by another transport carriage 130 provided with self-propelled devices 131 and 132, is suspended by a swivel beam 125, and the swirl beam turns 180 ° in a plane. And move it to the top. At this time, the floor slab 93 (FIGS. 19 and 20) is lowered and laid on the front side of the existing floor slab 92. For example, the PC floor slab 92 has a weight of 20 tons and a hanging bracket weight of 6 tons. The lifting device is performed using a 50 ton manual hydraulic jack 129. The working radius of the turn 127 is about 6 m. Reference numeral 126 denotes a chain block mounting rail.
[0003]
In the installation method, the floor slabs 92 are sequentially installed from the front side, and the installation is carried out by placing an installation machine on the floor slab near the leading end. This erection machine is provided with a large swing boom that lifts a floor slab 94 transported from the rear and turns to turn the floor slab forward. For this reason, there is a limit to constructing a large floor slab. The floor slab is full size in the width direction, for example, exceeding 15 m, but the length in the bridge axis direction is divided into about 2 m at most. The transportation to the erection machine is carried on the left and right drive carriage 130 on the bridge surface.
[0004]
[Problems to be solved by the invention]
In the present invention, a PC slab having a larger scale than the conventional large-scale PC slab, for example, a PC slab whose width coincides with the bridge width and whose dimension in the bridge axis direction reaches, for example, 10 m is installed. Such a large-scale precast PC floor slab cannot be erected even by a conventional large erection apparatus as shown in FIGS.
[0005]
It is an object of the present invention to provide a novel erection method and apparatus capable of erection of such a large-scale floor slab.
[0006]
[Means for Solving the Problems]
The present invention has been made to solve the above problems, and the method of the present invention should transport a plurality of traveling carriages equipped with lifting means when laying a large-scale PC floor slab on a bridge surface. Place it before and after the floor slab, suspend the floor slab, run all the traveling carts on the bridge surface at the synchronous speed, reorder the traveling rail step of the preceding traveling cart at the rail step position, and place the floor at the floor slab laying position Remove the rail under the block and install the new floor slab on the bridge surface, lay the rail on the new floor slab, change the traveling rail step of the traveling cart ahead , and position the floor slab for the next transport of all carts This is a construction method of a large-scale PC floor slab characterized by repeating the transportation and installation of the next floor slab. In the present invention, traveling carriages are arranged before and after the floor slab to be laid. There are usually four traveling carts, each in front and rear, for a total of four, but more vehicles may be used depending on the conditions. There is a step difference in the rail between the bridge surface with the slab laid and the bridge surface not laid. Since the forward traveling carriage needs to travel beyond the stepped portion, the rear traveling carriage is changed . A traveling cart requires a jack for raising and lowering a floor slab to be transported, a jack for extending and lowering the cart itself for reordering , and both lifting devices.
[0007]
The apparatus of the present invention capable of suitably carrying out the above-described method of the present invention includes a front and rear pair of traveling carts that run on a plurality of rows of tracks on a bridge surface and are provided with lifting jacks, and each front and rear pair of traveling carts. and lifting horizontal hanging upper arm connecting the central Te overhang in a receiving beam for hanging the deck from elevating horizontal hanging upper arm, and deck retainer attached to a lower surface of said hanging upper arm, running rails step of groups of the preceding traveling carriage A large-scale PC slab erection device, comprising: a reordering device for reordering and a travel control device for synchronously traveling the plurality of traveling carts.
[0008]
Since the height of the upper surface of the rail differs depending on whether the running rail is on the girder or on the floor slab, it is necessary to raise and lower the traveling cart in accordance with this. For this reason, a refilling device is required. The refilling device is located ahead of the front traveling cart and is attached to the same refilling beam as the front traveling cart. When the reordering device reaches the repositioning position, it sits on the rail, floats the front traveling cart to take over the load of the front traveling cart, and then places the front traveling cart on the rail of a different level, To eliminate the seating and put the traveling vehicle in the normal state. This reordering device can be used in any case where the level goes up and down, and acts in the same way in either the forward path or the return path of the floor slab erection process. The refilling device may use a trolley that is exactly the same as the forward traveling trolley, or may be a single jack device. Depending on the type, the refilling operation is slightly different.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0010]
FIG. 1 is a side view showing an embodiment of the present invention. In this embodiment, a case is shown in which a floor slab is installed from the front side of the bridge body, and the floor slab is sequentially retracted to the near side. Two rails 110 are laid on a bridge body (for example, a steel girder) 100, and a rear traveling carriage 10 and a forward traveling carriage 20 that respectively travel on the two rails 110 are installed. Setting beams 12 and 22 are provided on the rear traveling carriage 10 and the forward traveling carriage 20, respectively, and are connected by a connecting member 16. Load beams 13 and 23 are provided on the setting beams 12 and 22, and the floor slab 90 is suspended by the suspended steel bars 14 and 24. The setting beam 12 is also provided with reaction force members 15 and 25 that take the reaction force of the suspended steel bars 14 and 24 on the floor slab 90 and is pressed against the upper surface of the floor slab 90. The floor slab 90 is stably suspended by the suspended steel bars 14 and 24 and the reaction force members 15 and 25. A cable reel 11 is attached to the rear traveling carriage 10, and is fed with power to move forward in the direction indicated by an arrow 41, so that it travels on its own. A replacement truck 30 is provided on the common frame 21 ahead of the front traveling carriage 20.
[0011]
2-5 is explanatory drawing of the work process of the Example of FIG. As shown in FIG. 1, the erection apparatus of the present invention moves forward and travels on the rail 110, and when it reaches the vicinity of the existing floor slab 80 as shown in FIG. 2, the load of the front traveling carriage 20 is changed to the replacement carriage 30. Reorder. The jack of the refill cart 30 is extended as indicated by the arrow 31 and placed on the existing floor slab 80. Next, the front traveling carriage 20 is reduced as indicated by an arrow 26 and lifted from the rail 110 so that the load on the front running carriage is borne by the replacement carriage. Next, when the vehicle advances, as shown in FIG. 3, the forward traveling carriage 20 is also placed on the existing floor slab 80, so that it is extended as shown by an arrow 27 and set on the existing floor slab 80. Next, the rail under the floor slab 90 to be laid is removed, and the floor slab 90 is lowered and installed on the bridge body 100 as indicated by an arrow 42.
[0012]
FIG. 4 shows a process in which after the floor slab 90 is installed, the forward traveling carriage 20 and the replacement carriage 30 are reversely fed in the direction of the arrow 43. When the front traveling carriage 20 reaches a position where it is removed from the installed floor slab 80, the jack is extended as shown by an arrow 28 as shown in FIG. Next, the replacement cart 30 is contracted as indicated by an arrow 32 and separated upward from the existing floor slab 80. All the carriages are then fed back as indicated by arrow 44 and returned to the position to lift the next floor slab. The above work is repeated.
[0013]
In FIGS. 1 to 5, the slabs are constructed from the front side of the bridge body sequentially to the front side, but FIGS. 6 to 9 show an embodiment in which the floor slabs are laid from the front side to the front side sequentially. It was.
[0014]
FIG. 6 shows that the new floor slab 90 is transported on the existing floor slab 80, the front traveling carriage 20 reaches the tip of the existing floor slab 80, and the replacement carriage 30 that has been suspended is the rail on the bridge body 100. 110 shows a step of seating on 110 and performing reshuffling by reducing the traveling cart 20. As it progresses slightly in the direction of the arrow 41, the traveling vehicle 20 is replaced on the rail 110, and the replacement vehicle 30 is reduced. In this state, it further advances in the direction of arrow 41 to reach the state of FIG. FIG. 7 shows a state immediately before the rear traveling carriage 10 reaches the leading end of the existing floor slab 80, the rail 110 below the new floor slab 90 is removed, and the new floor slab 90 is installed on the bridge body 100. Yes. Next, a rail is disposed on the new floor slab 90, and the relocation of placing the traveling carriage 20 on the rail on the new floor slab 90 is performed.
[0015]
FIG. 8 shows this replacement process, in which the replacement carriage 30 is seated on a rail and the front traveling carriage 20 is reduced. In this state, the vehicle travels slightly in the direction of arrow 43, places the traveling carriage 20 on the rail on the new floor slab 90, then reduces the replacement carriage 30 (FIG. 9), and all the carriages run in the direction of arrow 43. Return to the original position, and move on to the next floor slab conveyance work.
[0016]
FIG. 10 is a side view showing still another embodiment of the present invention. This embodiment is the same as the embodiment shown in FIG. 1 in that the rear traveling carriage 10 and the forward traveling carriage 20 are used, and FIG. 10 shows a state where the floor slab 90 is conveyed in the direction of the arrow 45. A difference from the example of FIG. 1 is that a jack 50 is provided instead of the replacement truck of FIG. The jack 50 is simpler and less expensive than the replacement cart, but the construction procedure is different from the apparatus of FIG. FIG. 11 is a view taken along the line AA in FIG.
[0017]
FIG. 12 shows a state in which the traveling vehicle 20 has reached a position in contact with the existing floor slab 80. In this state, the rail below the floor slab 90 to be laid is removed, and the floor slab 90 is lowered and installed on the bridge body 100 as indicated by an arrow 46. FIG. 13 shows a state in which the traveling carriage is lowered as seen in the direction of arrows BB in FIG. Next, as shown in FIG. 14, the jack 50 is extended on the existing floor slab 80, and the front traveling carriage 20 and the load receiving beam 23 are raised by the rear traveling carriage 10 and the jack 50. At this time, since the traveling carriages 10 and 20 do not suspend the floor slab 90, the jack 50 does not require a strong ability. The plan view of FIG. 14 is shown in FIG. As shown in FIG. 14, the front traveling carriage 20 is reduced and lifted, and the rail under it is removed. Further, as shown in FIG. 16, the rail is extended from the existing floor slab 80 to above the new floor slab 90. The front traveling carriage 20 is lowered onto the rail and placed on the new floor slab 90, and the traveling carriage is moved backward in the direction of arrow 47. After the traveling carriage is moved backward, the floor slab is formed by placing the cast-in-place concrete in the gap between the existing floor slab 80 and the new floor slab 90. As shown in FIG. 17, when the front traveling carriage 20 comes off the existing floor slab 80 (the same as the floor slab 90 that has been laid), the front traveling carriage 20 is lowered onto the rail 110, and then the jack 50 is reduced. Retreat to the floor slab transport position and repeat the above operations.
[0018]
【The invention's effect】
According to the present invention, it has become possible for the first time to construct a large-scale PC slab whose width matches the bridge width and whose axial dimension in the bridge axis reaches 10 m.
[Brief description of the drawings]
FIG. 1 is a side view showing steps of an embodiment of the present invention.
FIG. 2 is a side view showing the process of the embodiment of the present invention.
FIG. 3 is a side view showing the process of the embodiment of the present invention.
FIG. 4 is a side view showing the process of the embodiment of the present invention.
FIG. 5 is a side view showing the process of the embodiment of the present invention.
FIG. 6 is a side view showing a process of another embodiment.
FIG. 7 is a side view showing a process of another example.
FIG. 8 is a side view showing a process of another embodiment.
FIG. 9 is a side view showing a process of another example.
FIG. 10 is a side view showing a process of another example.
11 is an AA arrow view of FIG.
FIG. 12 is a side view showing a process of another example.
13 is a view taken along arrow BB in FIG.
FIG. 14 is a side view showing a process of another example.
FIG. 15 is a plan view of the embodiment apparatus of FIG. 14;
FIG. 16 is a side view showing a process of another example.
FIG. 17 is a side view of another embodiment apparatus.
FIG. 18 is a plan view of a conventional device.
FIG. 19 is a side view of a conventional device.
FIG. 20 is a front view of a conventional device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Back traveling trolley 11 Cable reel 12 Setting beam 13 Load receiving beam 14 Suspension steel rod 15 Reaction force member 16 Connecting material 20 Forward traveling trolley 21 Replacement beam 22 Setting beam 23 Load receiving beam 24 Suspension steel rod 25 Reaction force Member 26 Arrow (Upward direction)
27 Arrow (downward direction)
28 Arrow (downward direction)
29 Jack 30 Refilling cart (Refilling device)
31 Arrow (downward direction)
32 arrow (ascending direction)
41 Arrow (forward direction)
42 Arrow (downward direction)
43 Arrow (Reverse direction)
44 arrow (backward direction)
45 arrow (forward and upward direction)
46 Arrow (Descent direction)
47 arrow (backward direction)
48 arrow (backward direction)
50 Jack (Refilling device)
80 Existing slab 90 (to be installed) Floor slab 100 Bridge (steel girder)
110 rail 111 rail

Claims (2)

When laying a large-scale PC floor slab on the bridge surface, a plurality of traveling carts equipped with lifting means are arranged before and after the floor slab to be transported to suspend the floor slab, and all traveling carts are synchronized at a speed. Run on the bridge surface, replace the traveling rail step of the traveling carriage at the rail step position, remove the rail under the floor slab at the floor laying position and install the new floor slab on the bridge surface, on the new floor slab A large-scale PC floor characterized by laying rails on the floor , rearranging the travel rail steps of the front traveling carriage , returning all carriages to the position of the next floor deck to be transported, and repeating the transportation and installation of the next floor deck How to build a plate. A pair of front and rear traveling carts that run on a plurality of rows of tracks on the bridge surface and are provided with lifting jacks, a lifting horizontal suspension upper arm that extends from each of the front and rear traveling carts and connects the centers, and the lifting horizontal suspension upper arms a receiving beam for hanging the slabs from a slab pressing attached to the underside of the suspended upper arm, and Morikawa device changing prime running rail step of groups of the preceding traveling vehicle traveling for running synchronizing the plurality of traveling vehicles A large-scale PC slab erection device comprising a control device.

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