JP2007182728A - Bridge construction method and bridge side floor slab mounting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method of a bridge, and a side floor slab mounting device for the bridge minimizing restrictions on construction such as traffic regulations without causing an increase in a construction cost or the extension of a construction period. <P>SOLUTION: A side floor slab 5 is transported into a predetermined position on a main girder 4 by a truck 6. There is thereby no need to lift the side floor slab 5 from a road by a truck crane or the like, nor need to provide an installation space and a working space for the truck crane or the like. In mounting the side floor slab to the side of the main girder 4, the side floor slab 5 is conveyed by a conveying device 13 of the side floor slab mounting device 10, and the fall of the side floor slab 5 is prevented by a fall preventive structure 14. There is thereby no need to limit passing of persons and vehicles below the side floor slab 5 during fixing work. Restrictions on traffic regulations or the like can thereby be minimized on the road or the like below and in a surrounding area below an upper construction 1B under construction, and restrictions on construction can be considerably relieved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bridge construction method and a bridge side floor slab mounting device, and more specifically, a steel main girder constructed between a plurality of support columns, and a steel main girder fixed to the side of the main girder. The present invention relates to a method for constructing a bridge having a side floor slab and a side floor slab mounting apparatus.

Conventionally, as a construction method of superstructure in a bridge composed of a substructure having a plurality of columns (piers) and a superstructure having a steel main girder and a side floor slab, In general, the main girder and the side floor slab are lifted from the top of the column to the upper part of the column, and the main girder is fixed to the column in the suspended state, and the side floor slab is fixed to the installed main beam. However, in such a method, when installing the main girder and side floor slab, the space below the lifting work range and the space for installing crane trucks are divided as construction sections to restrict the passage of people and vehicles (traffic regulations) Etc.), and there was a disadvantage that it was subject to large construction restrictions.
In order to alleviate such inconvenience, a construction method has been proposed in which a side floor slab can be attached without using a crane truck or the like on the ground (see, for example, Patent Document 1).
In the construction method described in Patent Document 1, the side floor slab is mounted in a folded state on the main girder in advance, and after the main girder is installed on the column, the side floor slab is unfolded to the side of the main girder. By fixing, the side floor slab can be attached without using a crane truck or the like.

JP 2004-176531 A

However, even in the construction method described in Patent Document 1, when the side floor slab is unfolded and fixed to the main girder, fixing work or the like on the lower side of the side floor slab is required. Regarding the lower part of the fixed position of the floor slab, it is necessary to restrict the passage of people and vehicles, and the space where the restrictions such as traffic regulations can be relaxed is limited, and a great effect cannot be expected.
Furthermore, in the construction method of Patent Document 1, it is necessary to prepare a high-performance crane to increase the weight of the main girder to be lifted, because the main girder with the side floor slab attached in advance is installed. Or, when the length of the main girder to be lifted is subdivided to suppress the increase in weight, it is necessary to increase the number of times of lifting or provide support work at a short pitch, which increases the construction cost and increases the construction period. There is also the problem of inviting.

  An object of the present invention is to provide a bridge construction method and a bridge side floor slab mounting device that can minimize construction restrictions such as traffic regulation without causing an increase in construction cost or a prolonged construction period. There is.

  According to a first aspect of the present invention, there is provided a bridge construction method comprising: a steel main girder installed between a plurality of support columns; and a steel side floor slab fixed to a side of the main girder. A construction method of a bridge having a conveying means for lifting the side floor slab transported to a predetermined position on the main girder and conveying it to a fixed position, and provided below the fixed position of the side floor slab A fall protection means for preventing the side floor slab from dropping, and the side floor slab is mounted using a side floor slab mounting device provided movably along the longitudinal direction of the main girder. .

According to the present invention described above, first, the side floor slab does not have to be lifted from the ground at the base end portion of the column by a crane vehicle or the like by transporting the side floor slab to a predetermined position on the main girder. There is no need to provide an installation space or work space. When the side floor slab is attached to the side of the main girder, the side floor slab is lifted and transported to the fixed position by using the transport means of the side floor slab mounting device, and the fall protection means drops the side floor slab. Therefore, it is not necessary to restrict the passage of people and vehicles under the side floor slab during fixing work. Therefore, it is possible to minimize restrictions such as traffic restrictions below and around the superstructure (main girder and side floor slab) under construction, and to construct the bridge on an existing road. However, the road need not be closed, and construction restrictions can be greatly eased.
In this case, the same effect can be obtained not only in the case of a bridge constructed on an existing road but also in a bridge straddling a railway. Also, it is a bridge provided in rivers and seas, and it is impossible to suspend the main girder and side floor slabs with a crane vehicle, etc. In this case, the construction of the bridge can be carried out at a low cost and in a short construction period by employing the construction method of the present invention.

The bridge construction method according to claim 2 of the present invention is the bridge construction method according to claim 1, wherein the side floor slab mounting device travels along a rail laid on the main girder. The conveying means includes a support beam extending laterally from an upper position of the main girder, a winch supported by the support beam and lifting the side floor slab, and the winch The fall protection means includes a vertical member extending downward from a front end portion of the support beam of the conveying means, and the side floor slab from a lower end portion of the vertical member. And a cross member extending to the lower side of the fixed position.
According to such a structure, the side floor slab formed with a predetermined length is attached by the side floor slab attachment device having traveling means for traveling along the rails laid on the main girder. After that, the side floor slab attaching device can be moved to sequentially attach the next side floor slab, and the workability of the attaching work can be improved.
In addition, since the conveying means of the side floor slab mounting apparatus has a support beam, a winch, and a moving means, the side floor slab transported on the main girder by a carriage or the like can be easily transported to its fixed position and attached. Work can be carried out.
Furthermore, by connecting the vertical members and cross members to the support beams of the transport means, the fall protection means can be constituted by a frame in which the support beams, vertical members and cross members are continuous in a substantially U-shape on the side, and the member is wasted. The side floor slab mounting device having an efficient structure can be obtained by omitting.

Furthermore, the bridge construction method according to claim 3 of the present invention is the bridge construction method according to claim 1 or 2, wherein the fall protection means is provided with a work scaffold, and the scaffold And fixing the lower part of the side floor slab to the main girder.
According to such a configuration, a work scaffold is provided in the fall protection means, and the work of fixing the side floor slab is improved by using this scaffold to fix the lower part of the side floor slab. In addition, it is not necessary to separately provide a suspension scaffold or the like, and the cost of temporary materials can be reduced.

On the other hand, the bridge side floor slab mounting device according to claim 4 of the present invention is a steel main girder installed between a plurality of columns and a steel main girder fixed to the side of the main girder. A bridge side floor slab mounting device used for mounting the side floor slab when a bridge having a side floor slab is installed, lifting the side floor slab transported to a predetermined position on the main girder And travels along rails laid on the main girder, transporting means for transporting to the fixed position, drop protection means for preventing the side floor slab from dropping and being provided below the fixed position of the side floor slab. Traveling means, and the conveying means includes a support beam extending laterally from above the main girder, a winch supported by the support beam to lift the side floor slab, and the winch And a moving means for moving along the beam. Is composed of a vertical member extending downward from the front end of the support beam of the conveying means, and a horizontal member extending from the lower end of the vertical member to below the fixed position of the side floor slab. And
According to such a configuration, similarly to the above-described construction method, traffic control restrictions and the like can be minimized at the lower and lower periphery of the upper work (main girder and side floor slab) under construction, Construction restrictions can be greatly eased. Furthermore, the workability in the installation work of the side floor slab can be improved.

Furthermore, the bridge side floor slab mounting device according to claim 5 of the present invention is the bridge side floor slab mounting device according to claim 4, wherein the fall protection means includes the side floor slab with respect to the main girder. A scaffold for carrying out the lower fixing work is provided.
According to such a configuration, the workability of the mounting work of the side floor slab is improved by performing the fixing work of the lower part of the side floor slab using the scaffolding provided in the fall protection means, similarly to the construction method described above. In addition, it is not necessary to separately provide a suspension scaffold or the like, and the cost of temporary materials can be reduced.

  According to the bridge construction method and the bridge side floor slab mounting apparatus of the present invention as described above, construction restrictions such as traffic regulations are minimized without causing an increase in construction cost and a prolonged construction period. Can do.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing a construction method of a bridge 1 according to an embodiment of the present invention. FIG. 2 is a perspective view showing a construction method of the bridge 1.
1 and 2, a bridge 1 includes a foundation 2 constructed in the ground G, a substructure 1 </ b> A composed of a plurality of pillars 3 having a base end fixed to the foundation 2 and extending upward, and a plurality of pillars And a superstructure 1B composed of a steel main girder 4 installed between 3 and a steel side floor slab 5 fixed in a cantilevered manner on both sides of the main girder 4. Yes. The bridge 1 is used as an elevated road provided along the existing road R laid on the ground G, and an asphalt pavement (not shown) is provided on the upper surface of the bridge 1 and side walls and the like. Is to be provided.

  The main girder 4 constituting the superstructure 1B is formed in a substantially box-shaped cross section by assembling a plurality of steel plates by welding or the like, and is supported on the upper portion of the support column 3. A bracket 4 </ b> A (see FIG. 3) for fixing the side floor slab 5 is provided on the side surface of the main beam 4. The side floor slab 5 is formed by assembling a plurality of steel plates such as an upper surface material 5A, an I-shaped steel, and a corrugated material, and is divided into a predetermined length dimension (for example, about 5 m) in the extending direction of the bridge 1. Then, the upper surface material 5A of the side floor slab 5 and the upper surface material of the main girder 4 are welded, the lower flange 5B of the I-shaped steel and the lower flange of the bracket 4A are welded, and the I-shaped steel web 5C and the bracket The side floor slab 5 and the main girder 4 are fixed by bolting the 4A web. Further, the upper surface material 5A of the side floor slab 5 adjacent to each other in the extending direction of the bridge 1 is welded and fixed, so that the upper surface of the superstructure 1B is substantially the same as the upper surface material of the main girder 4 and the upper surface material 5A of the side floor slab 5. It is designed to be flat.

  The main girder 4 is installed by being lifted up to the upper part of the column 3 by a crane truck or the like installed on the ground G, and the main beams 4 divided into a plurality of spans between the spans of the column 3 are connected as necessary. It has become. In this manner, the side floor slab 5 is attached to the main girder 4 using the side floor slab attachment device 10 in a state where the main girder 4 is continuously installed in the extending direction of the bridge 1. That is, the side floor slab 5 is transported from the right side of the drawing to a predetermined mounting position, as shown in FIG. While being lifted by the floor slab attachment device 10, it is moved to a fixed position and attached. The position where the side floor slab 5 is suspended on the main girder 4 includes a position where the road R has a sufficient road width, a sloping road position at the end of the bridge 1 connecting the road surface of the superstructure 1B and the road R, and the like. It is desirable. Moreover, as shown in FIG. 2, the side floor slab attachment apparatus 10 is provided with two units for attaching the side floor slab 5 to one and the other side surfaces of the main girder 4 in a horizontally reversed state.

The side floor slab mounting apparatus 10 for mounting the side floor slab 5 as described above will be described in detail with reference to FIGS.
FIGS. 3 and 4 are side views showing the side floor slab mounting apparatus 10, respectively. FIG. 5 is a plan view showing the side floor slab mounting apparatus 10.
The side floor slab mounting device 10 is a fixed position by lifting a side floor slab 5 supported by a pair of portal frames 11 and 12 provided along the extending direction of the bridge 1 and these portal frames 11 and 12. And a drop protection mechanism (drop protection means) 14 that is connected to the transfer device 13 and is located below the fixed position of the side floor slab 5. Wheels 15 are provided on the legs 11A and 12A of the portal frames 11 and 12 of the side floor slab mounting device 10, and the wheels 15 are guided to a pair of rails 7 temporarily provided on the upper surface of the main girder 4. As a result, the side floor slab mounting device 10 can move along the main beam 4. Furthermore, the wheel 15 in one portal frame 11 is driven by a drive device 16 such as a motor or an engine, so that the side floor slab mounting device 10 can be self-propelled on the rail 7. That is, the wheel 15 and the driving device 16 constitute a traveling device (traveling means) 17 of the present invention.

  The transfer device 13 includes a pair of support beams 18 that are installed on the beams 11B and 12B of the portal frames 11 and 12 and extend from an upper position of the main girder 4 to an upper position of the side floor slab 5 to be attached. A pair of slide members 19 supported movably along 18, a winch 20 having a lifting tool supported by each slide member 19 and lifting the side floor slab 5, and these slide member 19 and winch 20 The motor 21 is configured to be moved along the support beam 18. The conveying device 13 moves the slide member 19 to the front end side of the support beam 18 by driving the motor 21 while the side floor slab 5 is lifted by the winch 20, and lowers the winch 20, thereby reducing the side floor slab 5. Can be transported from the pedestal 6 to a fixed position (a position indicated by a two-dot chain line in FIGS. 3 and 5). Further, on the opposite side of the side floor slab 5 to be attached, that is, on the legs 11A and 12A of the portal frame 12 to which the base end side of the support beam 18 is connected, the portal frame 12 cannot be moved upward with respect to the rail 7. A locking member 22 for locking is provided. The locking member 22 constitutes means for preventing the overturning of the side floor slab mounting apparatus 10 when the side floor slab 5 is conveyed to the front end side of the support beam 18.

  The drop protection structure 14 includes a pair of vertical members 23 extending downward from the front end portion of the support beam 18 of the transport device 13 and a pair of horizontal members extending from the lower end portion of each vertical member 23 to below the fixing position of the side floor slab 5. 24 and a face material 25 such as a grating spanned between a pair of cross members 24. A handrail 26 is provided on the upper side of the cross member 24 and on the three sides between the pair of vertical members 23, and the upper space of the face member 25 is surrounded by the handrail 26 and the main girder 4 on all sides. A work space is formed. That is, a scaffolding is constituted by the face material 25 of the fall protection structure 14, and the side floor slab 5 and the bracket 4 </ b> A of the main girder 4 can be fixed from the face material 25. The fall protection structure 14 receives the side floor slab 5 with the face material 25 even if the side floor slab 5 is likely to fall during the transportation by the transport device 13, and the side floor slab 5 to the road R below. Can be prevented from falling. Further, the fixing member (splice plate, bolt, nut, welding material, etc.) and various tools during the fixing operation of the side floor slab 5 can be prevented by the face material 25 from falling.

According to this embodiment, there are the following effects.
(1) That is, since the side floor slab 5 is transported by the carriage 6 to a predetermined position on the main girder 4, it is not necessary to lift the side floor slab 5 from the road R with a crane car or the like. There is no need to provide a space or work space. When the side floor slab is attached to the side of the main girder 4, the side floor slab 5 is transported by the transport device 13 of the side floor slab mounting device 10, and the side floor slab 5 is dropped by the fall protection structure 14. Therefore, it is not necessary to restrict the passage of people and vehicles below the side floor slab 5 during the fixing work. Therefore, it is possible to minimize restrictions such as traffic restrictions on the road R below and below the superstructure 1B under construction, and this road R need not be closed, greatly restricting the construction restrictions. Can be relaxed.

(2) Furthermore, since the side floor slab attachment device 10 can travel along the rail 7 on the main girder 4, the side floor slab is attached after the side floor slab 5 formed with a predetermined length is attached. The mounting apparatus 10 can be moved and the next side floor slab 5 can be mounted sequentially, and the workability of the mounting work can be improved. Further, since the side floor slab mounting apparatus 10 is provided with the transport device 13, the side floor slab 5 can be easily transported to the fixed position to perform the mounting work, which further improves workability. it can.

(3) Further, a scaffold is constituted by the face material 25 of the fall protection structure 14, and the side floor slab 5 and the bracket 4 </ b> A of the main girder 4 can be fixed from above the face material 25. The workability of the attachment work can be improved, and it is not necessary to separately provide a suspension scaffold or an assembly scaffold, so that the cost of temporary materials can be reduced.

In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention.
For example, in the said embodiment, although the construction method of the bridge 1 constructed on the existing road R was demonstrated, not only this but the structure similar to the said embodiment is employable even if it is a bridge over a railway. Thus, the same effect can be obtained. In addition, it is a bridge provided in rivers, seas, lakes, etc., and it is impossible to suspend the main girder or side floor slab with a crane vehicle, etc. Even if it is necessary, the construction of the bridge can be carried out at low cost and in a short construction period by employing the construction method of the present invention.

Moreover, in the said embodiment, although the two side floor slab attachment apparatuses 10 for attaching the side floor slab 5 to each of the one side and the other side of the main girder 4 were installed, as shown in FIG. Moreover, it is also possible to attach both the side floor slabs 5 by one side floor slab attaching apparatus 10A.
That is, the side floor slab mounting apparatus 10A in FIG. 6 includes a pair of portal frames 11 of the side floor slab mounting apparatus 10 in the above-described embodiment, and the support beams of the transport device 13 supported by these portal frames 11. 18A is provided so as to protrude to both sides of the main girder 4, that is, above the fixing positions of the left and right side floor slabs 5. Then, the slide member 19 and the winch 20 that are movable along the support beam 18A can lift both the left and right side floor slabs 5 one by one and transport them to a fixed position. According to such a side floor slab attachment device 10A, since both the left and right side floor slabs 5 can be attached by a single unit, the production cost and assembly installation cost of the attachment device can be reduced.

  Furthermore, in the above-described embodiment, the T-shaped bridge 1 in which the side floor slab 5 is fixed in a cantilever manner on both sides of the single main girder 4 is described, but the form of the bridge is not particularly limited. It may be an inverted L-shaped bridge in which the side floor slab 5 is fixed in a cantilevered manner on one side of the main girder 4 or a gate type in which the side floor slab 5 is installed between two or more main girder 4 It may be a bridge.

In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described with particular reference to certain specific embodiments, but without departing from the spirit and scope of the invention, Various modifications can be made by those skilled in the art in terms of material, quantity, and other detailed configurations.
Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such restrictions is included in this invention.

It is a side view which shows the construction method of the bridge which concerns on embodiment of this invention. It is a perspective view which shows the construction method of the said bridge. It is a side view which shows the side floor slab attachment apparatus used for construction of the said bridge. It is a side view different from FIG. 3 which shows the said side floor slab attachment apparatus. It is a top view which shows the said side floor slab attachment apparatus. It is a side view which shows the side floor slab attachment apparatus used for construction of the bridge which concerns on the modification of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Bridge, 3 ... Post, 4 ... Main girder, 5 ... Side floor slab, 7 ... Rail, 10, 10A ... Side floor slab mounting device, 13 ... Conveyance device (conveyance means), 14 ... Drop protection structure (drop protection) Means), 17 ... Traveling device (traveling means), 18 ... Support beam, 20 ... Winch, 21 ... Motor as moving means, 23 ... Vertical member, 24 ... Cross member, 25 ... Face material as scaffold, G ... Ground .

Claims (5)

A method of constructing a bridge having a steel main girder constructed between a plurality of support columns and a steel side floor slab fixed to the side of the main girder,
Conveying means for lifting the side floor slab transported to a predetermined position on the main girder and transporting it to a fixed position, and fall protection provided below the fixed position of the side floor slab to prevent the side floor slab from falling A bridge construction method, wherein the side floor slab is attached using a side floor slab attachment device provided movably along the longitudinal direction of the main girder. In the construction method of the bridge according to claim 1,
The side floor slab mounting device includes traveling means for traveling along rails laid on the main girder,
The transport means includes a support beam extending laterally from an upper position of the main beam, a winch supported by the support beam and lifting the side floor slab, and a movement for moving the winch along the support beam. Means comprising:
The fall protection means includes a vertical member extending downward from the front end of the support beam of the conveying means, and a cross member extending from the lower end portion of the vertical member to below the fixed position of the side floor slab. The construction method of the bridge characterized by this. In the construction method of the bridge according to claim 1 or claim 2,
The fall protection means is provided with a working scaffold, and a fixing work of the lower part of the side floor slab with respect to the main girder is carried out using this scaffold. In order to install the side floor slab in the construction of a bridge having a steel main girder laid across a plurality of columns and a steel side slab fixed to the side of the main girder A side slab mounting device for a bridge used,
Conveying means for lifting the side floor slab transported to a predetermined position on the main girder and transporting it to a fixed position, and fall protection provided below the fixed position of the side floor slab to prevent the side floor slab from falling Means and traveling means for traveling along rails laid on the main girder,
The conveying means includes a support beam extending laterally from above the main girder, a winch supported by the support beam and lifting the side floor slab, and a moving means for moving the winch along the support beam. And configured with
The fall protection means includes a vertical member extending downward from the front end portion of the support beam of the conveying means, and a cross member extending from the lower end portion of the vertical member to below the fixed position of the side floor slab. A side floor slab mounting device for a bridge, characterized in that In the side slab mounting device for a bridge according to claim 4,
The bridge side floor slab mounting apparatus according to claim 1, wherein the fall protection means is provided with a scaffold for performing a fixing operation of the lower part of the side floor slab with respect to the main girder.

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