JP4431365B2 - Elevated structure and method for reinforcing elevated structure - Google Patents

Description

  The present invention relates to an elevated structure such as a road or a railroad track (referred to as a road in the present specification) and a method for reinforcing the elevated structure.

For elevated structures such as roads, reinforcement work has been done to enhance earthquake resistance. For example, there was a method of reinforcing the pier body by wrapping a steel plate around the concrete pier or filling concrete inside an iron pier.
On the other hand, a method of strengthening the footing of the pier has been proposed. This seismic reinforcement method is proposed in, for example, Japanese Patent Application Laid-Open No. 2002-188157.

  In this method, a composite pillar is formed on the ground around an existing pile that supports the footing of an existing bridge pier, and the composite pillar and the existing footing are connected and integrated with an extension footing.

In such a conventional seismic reinforcement method, the composite column must constitute a large-diameter improved body constructed by a high-pressure jet agitating method, and a ready-made pile inserted into a vertical hole provided in this improved body, and Since the construction method is large-scale, such as using a hardener to fix these ready-made piles to the improved body, the construction period was long and the cost was high.
Furthermore, since this method only strengthens the footing of the pier, when the elevated structure such as the road above the pier is shaken, the supporting force against the shake was not greatly improved. .
JP 2002-188157 A

  The present invention has been made in view of the above points, and provides a method for reinforcing an elevated structure that can be quickly constructed by a simple method and that can efficiently perform earthquake-proof construction, and an elevated structure obtained thereby. .

The gist of the present invention is that a pier is provided with a footing at the lower end of the column part, and provided with a beam part projecting outward from both sides of the column part at the upper end of the column part, and the footing is embedded in the ground The piers are erected, and the floors that constitute the roads and the like are supported by the beam parts, and piles are constructed in the vertical direction at both predetermined portions of the beam parts of the piers, and the piers are vertically moved by the piles. It is an elevated structure that is supported from the direction to prevent swinging.

The gist of the present invention is that the piles are driven in the vertical direction through the predetermined portions of both the beam portions projecting outward from both sides of the pillar portion of the pier from the surface of the floor portion constituting the road or the like. Then, it is the reinforcement method of the elevated structure which supports the said pier from a perpendicular direction and prevents rocking | fluctuation by supporting the front-end | tip of the said pile in the ground, and fixing the said pile to a pier after that.

  The gist of the present invention is that a bridge pier is provided with a footing at the lower end of the column part and a beam part is provided at the upper end, the footing is embedded in the ground, the pier is erected, and the two piers are provided. A main girder is bridged between the beam sections of the main beam, and the main girder supports the floor part constituting the road, etc., and either or both of a predetermined part of the main girder or the vicinity of the main girder from the surface of the floor part. An elevated structure in which a pile is constructed in the vertical direction and the main girder is supported from the vertical direction by the pile to prevent swinging.

  The gist of the present invention is that the pile is driven in the vertical direction through one or both of the predetermined part of the main girder or the vicinity of the main girder from the surface of the floor part constituting the road or the like. This is a method for reinforcing an elevated structure in which the tip of the pile is supported in the ground, and then the upper part of the pile is fixed to the main girder to support the main girder from the vertical direction and prevent swinging.

  Further, the gist of the present invention is that a pier is provided with a footing at the lower end of the column part and a beam part is provided at the upper end, the pier is erected by burying the footing in the ground, and two of the above A main girder is bridged between the beam portions of the pier, and the main girder supports the floor portion constituting the road and the like, and either one or both of the predetermined portion of the pier column or the beam portion and the main girder An elevated structure in which a pile is constructed in a vertical direction in either one or both of a predetermined location or in the vicinity of a main girder, and the pier and main girder are supported from the vertical direction by the pile to prevent swinging.

   Further, the gist of the present invention is that either one or both of a predetermined part of the bridge pier column or the beam part and a predetermined part of the main girder or the vicinity of the main girder from the surface of the floor part constituting the road or the like. After driving one or both of the piles in the vertical direction, support the tip of the pile in the ground, and then fix the pile to the pier and main girder so that the pier and main girder are in the vertical direction. A method of reinforcing an elevated structure that is supported from above to prevent swinging.

Since the invention of claim 1 is an elevated structure in which a pile is placed at a predetermined position at the end of the beam portion, it can be constructed with relatively simple construction and a short construction period. By supporting from above, not only the strength of the pier is increased, but also strong earthquake resistance against shaking in all directions of the pier and elevated structure.

Since the invention of claim 2 is a method of reinforcing piles by placing piles at predetermined locations on the ends of the beam portions of the piers, the construction process is relatively simple and the construction is relatively simple. It can be constructed in a short construction period without using, and can perform reinforcement work that efficiently obtains strong earthquake resistance and increases the strength of the pier.

  Since the invention of claim 3 is an elevated structure in which a pile is driven at a predetermined place in the main girder or in the vicinity thereof, it can be constructed with relatively simple construction and a short construction period. By supporting from above, it has strong earthquake resistance against shaking in all directions of main girder and elevated structure.

  Since the invention of claim 4 is a method for reinforcing an elevated structure by placing a pile at a predetermined place in the main girder or in the vicinity thereof, the construction is relatively simple and the construction is relatively simple, and a large apparatus is used. It can be constructed in a short construction period without any problems, and can be efficiently and reinforced with strong earthquake resistance.

  Since the invention of claim 5 is an elevated structure in which piles are driven at predetermined portions in the vicinity of the ends of the pillars or beams of the pier and the main girder or in the vicinity thereof, the effects of the above claims 1 and 3 Are obtained at the same time.

Since the invention of claim 6 is a method for reinforcing an elevated structure by placing a pile at a predetermined portion in the vicinity of the end portion of the pillar or beam portion of the pier and the main girder or in the vicinity thereof, The effect of claim 4 can be obtained at the same time.

  In the best mode for carrying out the present invention, a foot is provided with a footing at the lower end of the column part and a beam part is provided at the upper end. The footing is buried in the ground and the pier is erected. The main girder is bridged between the beam portions of the piers, and the main girder supports the floor portion that constitutes the road, etc., and the piles are vertically positioned at the predetermined portions of the steep beam portions and the main girder. This is an elevated structure that prevents the rocking by supporting the beam part and main girder of the pier from the vertical direction by the pile.

  The best mode for carrying out the present invention is that the pile is driven in the vertical direction through the end of the beam part of the bridge pier and the predetermined part of the main girder from the surface of the floor part constituting the road or the like. By supporting the tip of the pile in the ground and then fixing the upper part of the pile to the beam and main girder of the pier, the beam and main girder of the pier are supported from the vertical direction to prevent swinging. This is a method for reinforcing an elevated structure.

  FIG. 1 shows an embodiment of the present invention, FIG. 1 is a partially cutaway front view illustrating a method for reinforcing an elevated structure, and FIG. 2 is a floor portion excluding a method for reinforcing the elevated structure. FIG. 3 is a side view illustrating a method for reinforcing an elevated structure, FIG. 4 is a front view partially illustrating a method for reinforcing the elevated structure, and FIG. 5 is a method for reinforcing the elevated structure. FIG.

A method for reinforcing an elevated structure according to the present embodiment will be described with reference to the drawings.
In the figure, reference numeral 10 denotes a pier, and a column portion 12 of the pier 10 is erected on the ground by the supporting force of a lower footing 13 embedded in the ground, and the footing 13 is driven into the support layer 101. Is supported by a plurality of piles P10.

  The beam portion 11 formed on the upper portion of the column portion 12 of the pier 10 has a shape opened on both sides from the pier 10, and a plurality of main girders 22 are arranged on the upper surface thereof at regular intervals.

  The main girder 22 supports a floor 21 on which a road on which a car runs or a railroad track is laid, and is usually arranged in a state substantially orthogonal to the beam 11.

In the reinforcement work, first, a steel pipe pile press-fitting device (not shown) is disposed on the floor portion 21, and the steel pipe pile P1 is driven by this device.
As shown in FIG. 1, the steel pipe pile P1 indicated by the imaginary line above the floor portion 21 is lowered in the vertical direction, passes through the floor portion 21, and passes through the gap between the two main girders 22, 22. It penetrates the end portions 11a and 11b of the beam portion 11 and reaches the support layer 101 in the ground.
Then, if necessary, the top end of the steel pipe pile P1 is processed to prevent protrusion from the surface of the floor 21. At the same time, the upper portion of the steel pipe pile P1 is fixed to the beam portion 11 by a known method.
However, if the steel pipe pile P1 is firmly supported only by passing through the beam portion 11, no further fixing work is required.

Thereby, the pier 10 is firmly supported by the steel pipe pile P1. On the other hand, when the pier 10 is shaken by an earthquake or the like, the end portions 11a and 11b of the beam portion 11 are subjected to the largest shake.
That is, when the bridge pier 10 is shaken and a rotational moment is generated in the direction of the arrow M1 in FIG. 1, the end 11a tries to rotate downward, but the support force upward of the steel pipe pile P1 that supports the end 11a. The downward rotation is prevented by F1.
At this time, the other end portion 11b tries to rotate upward, but the upward rotation is prevented by the downward supporting force F2 of the steel pipe pile P1 supporting the end portion 11b.

As described above, according to the present embodiment, both ends of the beam portion 11 of the pier 10 are supported more firmly in the vertical direction by the steel pipe pile P1, so that the shaking of the pier during an earthquake can be effectively suppressed and the entire elevated structure. Can prevent damage from earthquakes.
Furthermore, the strength of the bridge pier or the floor main body is increased by placing the steel pipe pile P1.

  In the said Example, although the steel pipe pile P1 was driven in the both ends 11a and 11b of the beam part 11, either one edge part may be sufficient. Further, the pile to be placed is not limited to the steel pipe pile, and other piles can be used.

Next, a second embodiment of the present invention will be described.
As is apparent from FIGS. 2 to 4, this embodiment is a method of placing a steel pipe pile P <b> 2 on the main girder 22. The method for placing the steel pipe pile P2 in the present embodiment is the same as that in Embodiment 1 described above, but differs in that the main girder 22 is penetrated from the floor portion 21 or the vicinity thereof.
FIG. 2 shows a state of being driven in the gap between the two main girders 22, 22, and FIG. 4 shows a state of being driven through the main girder 22. In these cases, after placing, the upper portions of the steel pipe piles P2, P3 are fixed to the main girders 22, 22 by means such as welding.

  As for the main girder 22 for placing the steel pipe pile P2, the main girder on both ends of the floor portion 21 is more effective as much as possible. As is clear from FIG. 3, it is most effective to place two steel pipe piles P2 between the two piers 10 and 10 at equal intervals.

  Thereby, since the main girder 22 is firmly supported by the steel pipe pile P2, when the main girder 22 is subjected to shaking due to an earthquake or the like and a rotational moment is generated in the direction of the arrow M2 in FIG. As a result, the steel pipe pile P2 prevents the main girder 22 from rotating downward and upward.

  As described above, according to the present embodiment, the main girder 22 and the floor portion 21 are supported more firmly in the vertical direction by the steel pipe pile P2, so that the swing of the main girder 22 can be suppressed and damage to the entire elevated structure due to the earthquake is prevented. In addition, the strength of the structure of the floor 21 and the main girder 22 itself is increased.

In the said Example, the placement position, the number, etc. of the steel pipe piles P2 and P3 are not limited to a present Example, but can be determined arbitrarily. In addition, the piles to be placed are not limited to steel pipe piles, and other piles can be used.
2 and 3 show an example in which Example 1 and Example 2 are simultaneously applied.

In Example 3 shown in FIG. 5, two steel pipe piles P <b> 4 pass through the floor plate 21 and the column part 12 of the pier 10, and are driven through the gap between the main girders 22. Since the placement method and the like are the same as those in the above embodiments, the description thereof will be omitted. In this embodiment, by placing two steel pipe piles P4, it is possible to enhance the earthquake resistance of the pier 10 and increase the strength of the pier itself.
Moreover, the structure which drives one steel pipe pile P4 in the center of the column part 10 in the said Example is also employable.
Needless to say, this embodiment can be implemented in combination with the above embodiments.

Partially cutaway front view explaining how to reinforce an elevated structure Partially cutaway plan view excluding the floor to explain how to reinforce an elevated structure Side view explaining how to reinforce an elevated structure Partially cutaway front view explaining how to reinforce an elevated structure Partially cutaway front view explaining how to reinforce an elevated structure

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Bridge pier 11 Beam part 11a End part of beam part 11b End part of beam part 13 Footing 21 Floor part 22 Main girder 100 Ground 101 Support layer P1 Steel pipe pile P2 Steel pipe pile P3 Steel pipe pile P4 Steel pipe pile

Claims (6)

The bottom of the pillar part is provided with a footing, and the top part of the pillar part is constructed with a pier provided with a beam part projecting outward from both sides of the pillar part . The footing is buried in the ground and the pier is erected. While supporting the floor part which constituted the road etc. by the beam part , the pile is constructed in the vertical direction at both predetermined parts of the beam part of the pier, and the pier is supported from the vertical direction by the pile to prevent the swinging. Elevated structure. Pile the pile in the vertical direction from the surface of the floor that constitutes the road, etc., through both predetermined parts of the beam that protrudes outward from both sides of the pillar part of the pier, and then place the tip of the above pile in the ground A method for reinforcing an elevated structure that supports the bridge pier from a vertical direction and prevents swinging by supporting the pile to the pier after that.   A pier with a footing at the lower end of the column part and a beam part at the upper end is constructed, the footing is buried in the ground and the pier is erected, and the main girder is placed between the two beam parts of the pier. The main girder supports the floor part that constitutes the road and the like, and the pile is constructed in the vertical direction from the surface of the floor part at one or both of the predetermined part of the main girder or in the vicinity of the main girder. An elevated structure that supports the main girder from the vertical direction to prevent swinging.   After driving the pile vertically through one or both of the main girder or the vicinity of the main girder from the surface of the floor part constituting the road, etc., then support the tip of the above pile in the ground, A method for reinforcing an elevated structure in which an upper portion of the pile is fixed to a main girder to support the main girder from a vertical direction to prevent swinging.   A pier with a footing at the lower end of the column part and a beam part at the upper end is constructed, the footing is buried in the ground and the pier is erected, and the main girder is placed between the two beam parts of the pier. It supports and supports the floor part that constitutes the road etc. by this main girder, and at one or both of the predetermined part of the pillar or beam part of the pier and the predetermined part of the main girder or one or both of the vicinity of the main girder An elevated structure in which a pile is constructed in the vertical direction and the pier and main girder are supported from the vertical direction by the pile to prevent swinging.   Pile was laid in the vertical direction through one or both of the pillar or beam part of the pier and one or both of the main girder or the vicinity of the main girder from the surface of the floor constituting the road etc. After that, by supporting the tip of the pile in the ground and then fixing the pile to the pier and the main girder, the bridge pier and the main girder are supported from the vertical direction to prevent the swing structure from being reinforced. .

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