JP4852484B2 - Method for manufacturing bridge track - Google Patents

Description

  The present invention relates to a method of manufacturing a bridge part track that can build a vibration isolation track in the bridge part.

Conventionally, in a bridge portion, a track of the bridge portion is configured by laying sleepers (either vertical or horizontal) on the upper surface of a concrete slab installed on an iron girder. As this type of concrete slab, for example, there is floor slab concrete shown in Patent Documents 1 and 2, and sleepers are installed on the floor slab concrete via a support material.
JP 2005-163264 A JP 2002-332601 A

  By the way, in the concrete slab installed in the bridge part, when the train passes on the slab track, noise is generated by the vibration of the concrete slab being transmitted to the iron girder of the bridge part, in order to reduce or prevent the noise Countermeasures were necessary.

  An object of the present invention is to provide a method for manufacturing a bridge track that can easily construct a track having high vibration-proof performance in a bridge portion. .

  In order to achieve the above object, in the problem solving means of the present invention, a release means laminating step for providing a release means on the upper surface of the stringer and the transverse beam of the bridge portion, and lamination on the stringer and the transverse beam. On the mold release means, a mold forming process for forming a mold to prevent the concrete from being integrated with the main girder web of the bridge portion at the time of placing the concrete and to form the concrete into a plate shape, and on the mold release means A concrete placing process in which concrete is placed in the form of the floor to form floor slab concrete, a jack up process for jacking up the floor slab concrete, and the jacked up floor slab concrete and the vertical and horizontal girders It has a vibration isolator installation process for arranging a vibration isolator in the gap, and a jack down process for jacking down the floor slab concrete.

  Moreover, in the problem-solving means of the present invention, the releasing means is composed of an iron plate.

  In the problem-solving means of the present invention, the releasing means is configured by applying a releasing agent to the upper surfaces of the vertical and horizontal girders of the bridge portion.

  In the problem-solving means of the present invention, the jack for raising the floor slab concrete in the jack-up process is screwed into a vertical girder and a horizontal girder so that the axis thereof is vertical, and the upper end of this bolt is engaged. And a flange that moves up and down together with the bolt.

  In the method for constructing a bridge section track according to the present invention, after providing release means such as laying iron plates or applying a mold release on the upper surfaces of the vertical and horizontal girders of the bridge section, a mold is placed on the mold release means. Then, concrete is placed in the formwork to form floor slab concrete on which sleepers are laid. After the concrete is solidified, the floor slab concrete is jacked up, and after placing the anti-vibration material in the gap between the jacked up floor slab concrete and the vertical and horizontal girders, the floor slab concrete is jacked down. Anti-vibration materials are closely arranged between the girders and cross girders and the floor slab concrete. And by the process as described above, the vibration isolator can be easily installed between the vertical girder and cross girder of the bridge part and the floor slab concrete. When the train travels, the vibration of the floor slab concrete is prevented from being transmitted to the iron girder of the bridge portion, and noise generated thereby can be reduced or prevented. Moreover, since the release means is laminated on the lower surface of the floor slab concrete, when the floor slab concrete is jacked up, the floor slab concrete is not in close contact with the vertical and horizontal girders, and the jacking up is not hindered. It can be carried out.

  Moreover, in the construction method of the bridge part track of the present invention, a bolt is screwed to the vertical and horizontal girders so that the axis thereof is vertical, and a flange that moves up and down together with the bolt is provided at the upper end of the bolt. Since the bolt head is operated with a spanner or the like and the bolt is moved up and down with respect to the vertical and horizontal girders of the bridge portion, the above-described work of jacking up and down the floor slab concrete can be performed. This can be done easily and the workability can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. These drawings are explanatory diagrams for explaining the construction method of the bridge section track in the order of steps. First, in FIG. 1, reference numeral 1 is a bridge section composed of vertical and horizontal girders 2 and a main girder web 3. . The vertical girder and the horizontal girder 2 have a girder flange 4 and a girder flange 5, and a bolt 6 used as a gibber or the like is fixed to the girder flange 4 in floor slab concrete described later. Further, a flange 6 a is integrally attached to the bolt 6.

  Next, as shown in FIG. 2, a laying iron plate 7 serving as a release means is placed on the vertical and horizontal beams 2 of the bridge portion 1 shown in FIG. 1 (release means stacking step). The laying iron plate 7 is arranged so as to coincide with the installation position of floor slab concrete described later, and is formed slightly larger than the size (vertical and horizontal size) of the floor slab concrete. The laying iron plate 7 is provided with a through hole (not shown) in advance so that the bolt 6 can be inserted vertically. Moreover, it is not limited to using the laying iron plate 7 as a mold release means, but a mold release agent may be applied on the vertical and horizontal beams 2. Further, instead of the laying iron plate 7, a wood plate that forms the bottom plate of the mold may be used.

  Next, as shown in FIG. 3, on the laying iron plate 7 laminated on the vertical girder and the horizontal girder 2, it is prevented from being integrated with the main girder web 3 of the bridge portion 1 when placing concrete, and the concrete plate A mold 8 for forming the mold is formed (form forming process). Then, concrete is cast in the mold 8 using the laid iron plate 7 as a bottom plate to form a floor slab concrete 9 (concrete placing step). When placing concrete in the mold 8, it is desirable to apply a release agent or to embed a bolt penetration sleeve in the concrete so that the concrete does not adhere to the bolt 6. Further, as the mold 8, for example, styrene foam or timber is used. FIG. 7 shows a plan view of the floor slab concrete 9 formed by the above-described formwork forming process and concrete placing process. As shown in the figure, a plurality of floor slab concretes 9 are arranged between main girder webs 3 of the bridge portion 1 along the train track.

  Next, after the concrete has solidified and the formwork 8 has been removed, the floor slab concrete 9 is jacked up as shown in FIG. 4 (jacking process). For this jack-up, the floor slab concrete 9 may be lifted from below or suspended from above by using a hydraulic jack, a pantograph jack or the like.

  Next, as shown in FIG. 5, a vibration isolator 10 made of rubber is installed in the gap between the jacked-up floor slab concrete 9 and the upper flange 4 of the vertical girder and the horizontal girder 2 (vibration isolating material installation step). ). The anti-vibration material 10 may be a long one along the track or a quadrangular shape, and the shape and the number of installation are not limited.

  Next, as shown in FIG. 6, the floor slab concrete 9 is jacked down so that the vibration isolator 10 is closely disposed between the vertical and horizontal girders 2 of the bridge portion 1 and the floor slab concrete 9 (jacking). Down process). Thereafter, the track 11 is installed on the floor slab concrete 9. In this embodiment, the support pedestal 12 is installed on the floor slab concrete 9, and the rails 14 are fastened and fixed on the support pedestal 12 via the ladder sleepers 13, but the track 11 is formed. It is not limited to 13, and a horizontal sleeper may be used.

  As described above in detail, in the method of constructing the bridge portion track shown in the present embodiment, the iron plate 7 is placed on the upper surfaces of the vertical and horizontal girders 2 of the bridge portion 1, and then the mold is placed on the iron plate 7. A frame 8 is formed, and concrete is placed in the mold 8 to form floor slab concrete 9 on which the track 11 is laid. After the concrete is solidified, the floor slab concrete 9 is jacked up, the anti-vibration material 10 is arranged in the gap between the jacked-up floor slab concrete 9 and the vertical girder and the horizontal girder 2, and then the floor slab concrete 9 is jacked down. The vibration isolator 10 is disposed in close contact between the vertical and horizontal beams 2 of the bridge portion 1 and the floor slab concrete 9. And the vibration isolator 10 can be simply installed between the vertical girder and cross girder 2 of the bridge part 1 and the floor slab concrete 9 by the above processes, and the floor slab is provided by this vibration isolator 10. When the train travels on the track 11 on the concrete 9, the vibration of the floor slab concrete 9 is prevented from being transmitted to the iron girder of the bridge portion 1, and thereby noise generated can be reduced or prevented. . In addition, since a laying iron plate 7 (or a wood board or a release agent) serving as a release means is laminated on the lower surface of the floor slab concrete 9, when the floor slab concrete 9 is jacked up, the floor slab concrete 9 is bridged. The vertical girder and horizontal girder 2 of the section 1 are not in close contact with each other, and jacking up can be performed without any trouble.

In the embodiment described above, as a jack for raising the floor slab concrete 9, for example, a female screw is cut perpendicularly to the vertical girder 4 of the bridge portion 1 and the girder flange 4 of the horizontal girder 2, and the bolt 6 is screwed to this. In addition, the bolt 6 is provided with a flange 6a and integrally moved up and down so that it can be used as a jack. The flange 6a can be moved up and down with respect to the vertical and horizontal girders 2 of the bridge portion 1 by rotating the head of the bolt 6 with a spanner or the like. The laying iron plate 7 and the floor slab concrete 9 thereon can also be moved up and down. That is, the floor slab concrete 9 on the laying iron plate 7 can be jacked up and jacked down by the vertical movement of the bolt 6.
In addition, the said bolt 6 may be used as a mere jebel bolt, a concrete floor slab may be jacked up with the jack brought in separately, or may be lifted up with a crane.
In addition, in this case, it is of course necessary to cover the bottom of the mold 8 with a plate material or the like when placing concrete.

Front sectional view showing the bridge part 1 before installing the floor slab concrete Front sectional view for explaining the mold release means lamination step Front sectional view for explaining the mold forming process and concrete placing process Front sectional view for explaining jack-up process Front sectional view for explaining the vibration isolator installation process Front sectional view for explaining jackdown process Plan view of floor slab concrete 9 on bridge 1 as seen from above

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bridge part 2 Vertical girder and horizontal girder 3 Main girder web 4 Girder upper flange 5 Girder lower flange 6 Bolt 6a Flange 7 Laying iron plate 8 Formwork 9 Floor slab concrete 10 Anti-vibration material 11 Track

Claims (4)

  Release means laminating process for providing release means on the upper and lower girders of the bridge part, and the main girder web of the bridge part when placing concrete on the release means laminated on the vertical and horizontal girders Forming a mold for forming concrete into a plate shape and forming a floor slab concrete by placing concrete in the mold on the mold release means A concrete placing process, a jackup process for jacking up the floor slab concrete, a vibration isolation material installation process for arranging a vibration isolation material in the gap between the jacked-up floor slab concrete and the vertical and horizontal girders, and a floor slab A method of manufacturing a bridge track, comprising: a jackdown process for jacking down concrete.   2. The method of manufacturing a bridge portion track according to claim 1, wherein the releasing means is made of an iron plate.   2. The method of manufacturing a bridge portion track according to claim 1, wherein the releasing means applies a release agent to the upper surface of the vertical and horizontal beams of the bridge portion.   In the jack for raising the floor slab concrete in the jack-up process, a bolt is screwed to the vertical and horizontal girders so that the axis thereof is vertical, and a flange that moves up and down together with the bolt is provided integrally with the bolt. The bridge part track manufacturing method according to claim 2, wherein

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