JP4526941B2 - Bridge floor slab erection method and floor slab carrier - Google Patents

Description

  The present invention relates to a technique for conveying a floor slab for a bridge.

  Recently, precast-type floor slabs (hereinafter referred to as PC floor slabs) are used for replacement of bridge decks on girders and new installations.

  In order to carry the PC floor slab onto the girders, for example, as shown in FIG. 9, there is a method in which a crane car 300 is installed under the bridge and the PC floor slab 304 is installed on the bridge girders 302.

  According to this method, the crane vehicle 300 is installed under the bridge, and a truck (not shown) carrying the PC floor slab 304 needs to be placed on the crane vehicle 300, so that a wide work space is required. . Therefore, adverse effects on traffic are unavoidable even if measures such as construction at night are taken.

On the other hand, on-site slabs are economical, but require formwork, rebar, concrete placement, etc., and the construction period is long and the curing of vehicles passing under the bridge (various treatment) is large. It will be something.
Although it is conceivable to construct a bridge using a steel slab instead of a PC slab, there is a problem in that the cost becomes higher than when a PC slab is used.

In addition, about the construction method of a bridge, patent document 1 is mentioned, for example.
JP 2000-257024 A

  The present invention has been made in view of such a situation, and the problem to be solved is a technique capable of eliminating the installation space of the crane on the ground and eliminating the adverse effects on traffic. It is to provide.

  Therefore, the present invention employs the following means.

That is, the present invention provides a bridge floor slab erection method in which a plurality of floor slabs are installed between a pair of left and right main girders that extend parallel to each other in the axial direction of the bridge and are installed on both sides of the bridge. In installing the plate, a floor slab transport vehicle that transports the floor slab by moving in the axial direction of the bridge on the pair of main girders is provided, and the floor slab is moved from the predetermined position by the floor slab transport vehicle. By repeating the operation of moving to the upper floor slab installation position, the floor slabs were sequentially arranged on the bridge.
Further, the main girder is made of a shape steel having a flange on the web, and the floor slab transporter is placed on the flange of the main girder. Examples of the shape steel include ready-made H-shape steel, I-shape steel, built-type H-shape steel, I-shape steel, and box-shape steel.

Therefore, according to the present invention, when installing a plurality of floor slabs, the floor slab transporter moves the upper flanges of the left and right main girders installed on both sides of the bridge, so that the floor slab is moved to the floor slab installation position on the bridge. Since it is moved, it is not necessary to move the crane truck to the predetermined position, and thus the space for installing the crane on the ground, which was necessary in the construction work of the bridge floor slab, becomes unnecessary.

  According to the present invention, traffic congestion caused by installing the crane on the ground is less likely to occur. Moreover, since it is not necessary to install a crane vehicle on the ground, the free space can be used as a storage place for various members required for the construction. Therefore, various members necessary for the construction can be quickly supplied, so that workability is improved.

  Embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to FIGS.

FIG. 1 is a bridge 1 constructed by using a bridge floor slab erection method according to the present invention.
The bridge 1 is disposed on a pair of left and right main girders 31 made of H-shaped steel extending in parallel to each other in the axial direction thereof, and a web portion 31a of the left and right main girders 31. A bridge floor slab 5 including a plurality of PC slabs 51, 51,... Provided between a web girder 31 of the main girder 31. It has the bridge pier 7 which supports the girder 31 from the ground.

  By positioning the PC floor slab 5 between the web portions 31a of the main girder 31, the bridge 1 has a so-called middle path type.

Further, each of the PC floor slabs 51 is provided on the web portion 31a of the main girder 31, and both end edges are supported by a floor slab support plate 6 installed at regular intervals in the longitudinal direction of the bridge 1 (FIG. 2). reference). Note that the PC floor slab 51 is supported by a plurality of triangular or trapezoidal support plates through the floor slab support plate 6 (in the figure, at both ends of the floor slab support plate 6 for simplification). The state which only supports is shown (refer FIG. 1).
The PC floor slab 51 has a width dimension of about 2500 mm, for example, and is arranged so that the width direction is parallel to the longitudinal direction of the bridge.

  Next, the PC floor slab 51 of such a bridge 1 is transported from the position where the bridge starts to the floor slab installation position of the main girder 31, and the floor slab is installed from the position where the bridge starts (predetermined position). The floor slab conveyance vehicle 10 in which the floor slabs are sequentially arranged up to the position will be described.

  The floor slab carrier 10 moves on the upper flange 31b of the left and right main girders 31. For this purpose, the floor slab carrier 10 is provided on a rectangular main body 18 formed in a frame shape with a steel material, with support legs 14 provided at the four corners thereof, and rotatably provided at the tip ends of the support legs 14. A transport wheel 12 that moves on the upper flange 31b of the main girder 31 and a plate that is provided at the front end of the support leg 14 and corresponds to the side edge of the upper flange 31b, and prevents rolls of the upper floor transport vehicle 10 Alternatively, a lateral movement restriction device 17 composed of a support wheel and a lifting device 16 for lifting and lowering the PC floor slab 51 are provided (see FIG. 3). Further, in this embodiment, the length dimension of the floor slab carrier 10 is set to about 3000 mm, which is slightly longer than the width dimension of the PC floor slab 51. You may make it improve the installation property of the PC floor slab 51 when the plate conveyance vehicle 10 conveys the PC floor slab 51 to the bridge edge part.

  Each conveyance wheel 12 is driven by an appropriate driving device.

Also, the lifting device 16 itself can move the main body 18 in the width direction by an appropriate driving device. Further, the lifting device 16 suspends the PC floor slab 51 with the hanging tool 16a, but is connected to the PC floor slab 51 at four locations on the front, rear, left and right sides of the PC floor slab 51 so as to be stably suspended. (See FIGS. 3 to 5).

  The transport wheel 12 and the lifting device 16 can be remotely operated by a remote controller 20 (see FIG. 5).

  Next, a method of laying the floor slab 51 on the bridge using such a floor slab conveyance vehicle 10 will be described.

  This will be described with reference to FIGS.

  (A) has shown the construction state of the pier 7, and the thing installed in the center has length. In this embodiment, the bridge piers 7 are illustrated as being installed at approximately equal intervals. However, the present invention is not limited to this.

  (B) has shown the state in the middle of having constructed the main girder 31 to the bridge pier 7 formed by (a) by the well-known delivery method.

  (C) is a state in which the construction of the main beam 31 has been completed.

  (D) shows the halfway state where the PC floor slab 51 is erected from the right side of FIG.

  When the plurality of PC floor slabs 51 are installed on the main girder 31, the floor slab carrier 10 moves in the axial direction of the bridge 7 on the upper flanges 31 b of the left and right main girder 31, so that the PC floor slab 51 is connected to the bridge 1. Is moved from the starting point (predetermined location) to the floor slab installation position on the main girder, and moved up and down to the upper edge (corresponding to the base of the triangle) of the floor slab support plate 6 provided in advance at the floor slab installation position The PC 16 is lowered by the device 16 and the PC floor slabs 51 are successively arranged in parallel in the longitudinal direction of the bridge 1. Note that the PC floor slab 51 is suspended by the hanging tool 16a of the lifting device 16 at the starting point of the bridge 1, and is transported to a predetermined installation location by the floor slab carrier 10 in that state, and then the installation is performed. When it reaches the point, it is lowered by the lifting device 16, and then returns to the starting point again, and the same operation is repeated.

  Thus, in this embodiment, the ground crane car required in the construction work of the bridge floor slab using the conventional crane truck and the space for the installation are unnecessary.

  Therefore, it is possible to prevent the traffic jam that has occurred due to the installation of the crane truck. In addition, since there is no need to install a crane truck on the ground, if a space for installing a crane truck, which was necessary in the past, is secured, it can be used as a storage place for storing various members required for bridge construction. Can do. Therefore, since various members necessary for the construction can be supplied quickly, workability is improved.

In addition, because the road girder structure where the vehicle runs over the bridge girder, the planned road height will be high,
Although there is a problem that the entire length of the bridge is naturally long, in the present embodiment, since the floor slab 51 is located in the middle of the main girder 31 in the height direction, the height of the bridge can be suppressed. Since the road height can be suppressed, the total length of the bridge can be shortened naturally.

  In the case of a three-dimensionally intersecting bridge, the height of the bridge is higher than that of a non-crossover bridge, which requires advanced work. However, since the floor slab is transported without using a crane, it is relatively easy to eliminate adverse effects on traffic such as traffic jams. It can also be applied to bridges other than three-dimensionally intersecting bridges.

  Moreover, the upper half of the main girder 31 can be used as a high column by adopting the above-described middle path format. For this reason, it is possible not only to shorten the construction period of the high-profile work but also to reduce the construction cost.

  In addition, this invention is not limited only to the above-mentioned illustration example, Of course, various changes can be added within the range which does not deviate from the summary of this invention.

  For example, in the above-described embodiment, the case of facing two lanes is illustrated, but it is needless to say that the present invention can also be applied to the case of four lanes each having two upper and lower lanes as shown in FIGS. In this case, the pier 7 and the main girder 31 are three, and the middle main girder 31 is shared with the left and right main girder 31 and is constructed on each of the left and right sides.

  FIG. 6D shows only the floor slab transporter 10 that has traveled from one of the main girders 31, but a separate floor slab transporter 10 travels from both of the main girders 31. The floor slab carrier 10 may be moved backward by the main girder 31 after the attachment work is completed.

It is a perspective view of the bridge completed by the bridge floor slab erection method concerning the present invention, and shows the case of facing two lanes. It is a cross-sectional view of FIG. It is a perspective view when the floor slab carrier according to the present invention is on the main beam. FIG. 4 is a cross-sectional view of FIG. 3. FIG. 4 is a side view of FIG. 3. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining step by step from construction of a bridge pier to installation of a floor slab by a bridge floor slab erection method according to the present invention. FIG. 3 is a perspective view of a bridge corresponding to FIG. 1 and completed by the bridge floor slab erection method according to the present invention, and showing a case where there are four lanes in two upper and lower lanes. FIG. 8 corresponds to FIG. 2 and is a cross-sectional view of FIG. It is a figure which shows an example of a prior art example.

Explanation of symbols

1 Bridge 3 Bridge Girder 5 Bridge Floor Slab 6 Floor Slab Support Plate (Slab Support Material)
DESCRIPTION OF SYMBOLS 7 Bridge pier 10 Floor slab conveyance vehicle 12 Conveyance wheel 14 Support leg 16 Lifting device 16a Lifting tool 17 Lateral movement restricting device 18 Main part 20 Remote controller 31 Main beam 31a Web part 31b Upper flange 33 Horizontal 51 PC floor slab 300 Crane car 302 Bridge girder 304 Floor slab

Claims (5)

In the bridge floor slab erection method that lays a plurality of floor slabs between a pair of left and right main girders that extend parallel to each other in the axial direction of the bridge and are installed on both sides of the bridge,
In installing the plurality of floor slabs,
Providing a floor slab transporter that moves the pair of main girders in the axial direction of the bridge to transport the floor slab;
By repeating the operation of moving the floor slab from a predetermined position to the floor slab installation position on the main girder by this floor slab conveyance vehicle,
A bridge floor slab erection method characterized by sequentially arranging the floor slabs on the bridge. The main girder is composed of a section having a flange on the web,
The bridge slab erection method according to claim 1, wherein the floor slab transporter is placed on the flanges of the pair of main girders.   The floor slab support material that supports the floor slab is installed on the web of the pair of main girders, and the floor slab transport vehicle is equipped with a lifting device, and the floor transported to the floor slab installation position by the lifting device The bridge floor slab erection method according to claim 1 or 2, wherein the plate is lowered from the floor slab carrier onto the floor slab support. This is a floor slab transporter used in the bridge floor slab erection method that lays a plurality of floor slabs between a pair of left and right main girders that extend parallel to each other in the axial direction of the bridge and are installed on both sides of the bridge. There,
A main body for carrying the floor slab,
A transport wheel that is rotatably supported by the main body and moves on the main beam;
A floor slab transporter having a lateral movement restricting device including a plate or a support wheel provided corresponding to a side edge of the flange of the main girder in order to prevent rolling of the upper floor slab transport vehicle. Equipped with a lifting device, the floor slab transported to the floor slab installation position is lowered by the lifting device from the floor slab carrier onto a floor slab support material that supports both edges of the floor slab. The floor slab conveyance vehicle according to claim 4.

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