JP7018031B2 - How to build a structure - Google Patents

Description

The present invention relates to a method for constructing a structure in a water area.

As a method of placing concrete in order to construct structures such as bridge piers in a river, a concrete plant ship is used. Concrete is delivered from a ready-mixed concrete truck to a pump truck on a pontoon and concrete is poured from the pump truck on the pontoon. There are methods such as placing a ready-mixed concrete hopper on a pontoon and placing concrete from a pump truck on the pontoon, floating a pipe on the water surface, and placing concrete using the pipe.

Further, Patent Document 1 describes a temporary pier provided in the vicinity of the pier position in order to cast concrete to construct a pier foundation in a river so that a pump truck can run on the temporary pier. ing.

Japanese Patent Application Laid-Open No. 2002-146811

However, concrete plant ships are large-scale, and if there is a bridge on the route to the construction site, there is a problem that it cannot pass under it. In addition, when concrete is poured from a pump truck on a pontoon, there is a problem that the quality of concrete deteriorates over time. For example, if it takes time to board and disembark a ready-mixed concrete truck, the slump loss becomes large, and in the ready-mixed concrete hopper, the ready-mixed concrete descends in the hopper and the slump becomes small. In addition, when using a ship such as a concrete plant ship or a pontoon, it is difficult to navigate at right angles to the flow of the river.

On the other hand, when concrete is placed by floating a pipe on the water surface or when a temporary pier is used as in Patent Document 1, the above-mentioned problems are few. However, when floating pipes on the surface of the water, concrete cannot be placed if the river flow is fast. In addition, since long-distance pumping is required, there is a high possibility that the piping will be blocked, and there is also the problem that it cannot be dealt with at that time. Further, in the method of Patent Document 1, since the pump truck runs on the temporary pier, a large-scale temporary pier having a certain strength is required, and the time and cost required for its construction increase.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for constructing a structure capable of easily constructing a structure by placing concrete in a water area.

In the present invention for solving the above-mentioned problems, a pier for arranging a pipe for placing concrete is constructed in a water area so as to extend along an existing bridge, and is arranged so as to extend along the pier. This is a method for constructing a structure, which comprises placing concrete at a position of a pier of a new bridge in a water area on the side of the pier using the above-mentioned pipe to construct the structure.

In the present invention, a pier is constructed in a water area such as a river, and a structure is constructed in the water area by placing concrete using the pipes arranged on the pier. In the present invention, a ship is not required when placing concrete, and since the pipe is arranged on the pier, concrete can be placed regardless of the flow of the river, and the worker on the pier can deal with the blockage of the pipe. In addition, there is no need for the pump truck to move on the pier, and the load applied to the pier is only the weight of the pipes and workers, so the pier configuration can be simplified.

In the pier, for example, a passage girder is supported by a steel pile, and a plate material is provided on the passage girder.
As described above, the pier has a simple structure, and as a simple structure as described above, the time and cost required for its construction can be reduced.

The pier is provided so as to extend to the water area along the existing bridge, and the concrete is cast at the position of the pier of the new bridge, so that the pier of the new bridge and its pier can be used in the replacement work of the existing bridge. The foundation can be constructed from concrete.

The pier is arranged, for example, on the downstream side of the existing bridge in a river, and the pile of the pier is arranged on the downstream side of the existing bridge at a position corresponding to the pier of the existing bridge.
This can prevent the pier piles from increasing the river volume obstruction rate. In the present invention, since the load applied to the pier is small and the pier can be configured in a simple manner, it is easy to increase the span of the pile and adjust its position to the position of the pier of the existing bridge.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a method for constructing a structure capable of easily constructing a structure by placing concrete in a water area.

The figure which shows the bridge pier position c1 to c4. The figure which shows the pier 1. The figure which shows the pier 1. The figure which shows the pier 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

(1. Construction of piers C1 to C4 in water area)
1A is a diagram showing positions c1 to c4 of piers (hereinafter referred to as pier positions) which are structures constructed by the construction method according to the embodiment of the present invention, and FIG. 1B is a diagram showing piers. It is a figure which shows the outline of the piers C1 to C4 constructed at each of the positions c1 to c4.

The piers C1 to C4 are piers of a new bridge constructed in the vicinity of the existing bridge D as a replacement work of the existing bridge D. The new bridge is provided along the extension direction of the existing bridge D, and the pier positions c1 to c4 are also planned along the extension direction of the existing bridge D.

The existing bridge D and the above-mentioned new bridge are provided so as to extend from the river bank A (land) and cross the water area B of the river, and the existing bridge D has piers D1 to D4 provided in a predetermined span in the extending direction thereof. ..

The arrow b in FIG. 1A indicates the flow direction of the river, and the pier positions c1 to c4 correspond to the downstream sides of the piers D1 to D4 of the existing bridge D, respectively.

In the present embodiment, concrete is placed at each of the pier positions c1 to c4 in the water area B to construct the piers C1 to C4 and the foundation portion thereof. At this time, as shown in FIG. 1A, a simple temporary pier 1 is constructed, and a concrete casting pipe 3 is provided on the pier 1.

The pipe 3 is arranged so as to extend from the riverbank A along the pier 1, concrete is pumped in the pipe 3, and concrete is placed at each of the pier positions c1 to c4 in the water area B on the side of the pier 1. do. The worker on the pier 1 manages the concrete placement, and takes measures such as the blockage of the pipe 3.

The pier 1 is provided in the vicinity of the existing bridge D and the new bridge to be constructed so as to extend from the riverbank A along the extending direction of these bridges. The pier 1 of the present embodiment is arranged on the downstream side of the existing bridge D between the existing bridge D and the new bridge. Reference numeral 31 in FIG. 1A is a branch portion that branches from the pipe 3, and in the example of the figure, a branch portion 31 that branches from the pipe 3 is provided in order to place concrete at the bridge pier position c1.

(2. Pier 1)
2 to 4 are views showing a part of the pier 1 in the bridge axial direction, FIG. 2 is a view of the pier 1 from the side, FIG. 3 is a view of the pier 1 from above, and FIG. 4 is a view of the pier. It is a figure which looked at the vertical plane orthogonal to the bridge axis direction of 1. The bridge axis direction corresponds to the left-right direction of FIGS. 2 and 3 and the paper normal direction of FIG.

The pier 1 is provided to secure a space on the water for moving workers and arranging pipes 3 when placing concrete at the pier positions c1 to c4.

The pier 1 has a passage portion 10 erected on the water and a support portion 20 that supports the passage portion 10 from the ground at the bottom of the water. The passage portion 10 and the support portion 20 are mainly composed of steel materials.

The passage portion 10 has a passage girder 11, a scaffolding plate 13, an enclosure 14, and the like.

The passage girder 11 is a girder material provided in the direction of the bridge axis, and is used, for example, by connecting the ends of a plurality of H-shaped steel members in the axial direction with splicing plates or the like. The passage girder 11 is formed by installing a material such as H-shaped steel placed on a pontoon with a crane.

In the present embodiment, the pair of passage girders 11 are arranged so as to be parallel to each other, and these passage girders 11 are connected by a connecting member 12 in the direction orthogonal to the bridge axis. The bridge axis orthogonal direction is a direction orthogonal to the bridge axis direction in a plane, and corresponds to the paper normal direction of FIG. 2, the vertical direction of FIG. 3, and the left-right direction of FIG.

The scaffolding plate 13 is a plate material arranged on the passage girder 11, and constitutes a passage surface on which the worker moves and the pipe 3 is arranged. Baseboards (not shown) along the bridge axis direction are also provided on both sides of the scaffolding plate 13.

The enclosure 14 is arranged so as to cover both sides of the passage portion 10 and the sky by assembling steel pipes and the like in a grid pattern.

The support portion 20 has a pile 21, a support beam 22, a brace 23, a connecting member 24, and the like.

The pile 21 is made of steel and is formed by placing shaped steel such as H-shaped steel on the ground at the bottom of the water. The piles 21 are arranged in a predetermined span along the bridge axis direction. The reference numeral a in FIG. 1A indicates the position where the pile 21 is provided on the pier 1, and the position of the pile 21 in the bridge axial direction corresponds to the position of the piers D1 to D4 of the existing bridge D. For example, when the span of the piers D1 to D4 of the existing bridge D is 16 m, the span of the pile 21 is also 16 m.

A pair of piles 21 are provided in the direction orthogonal to the bridge axis, and a support beam 22 is bridged between the upper ends of these piles 21. A passage girder 11 is placed on the support beam 22, and the pile 21 supports the passage girder 11 via the support beam 22. Shaped steel such as a channel material is used for the support beam 22. The support beams 22 are attached to both front and rear surfaces of the pile 21 in the bridge axial direction.

A brace 23 and a connecting member 24 are also provided between the pair of piles 21 in the direction orthogonal to the bridge axis. The brace 23 is a diagonal member provided below the support beam 22 so as to connect the piles 21, and the brace 23 attached to both front and rear surfaces of the pile 21 in the bridge axial direction is arranged in an X shape. The connecting member 24 is provided in the horizontal direction below the brace 23 and above the water so as to connect the piles 21 to each other. Shaped steel such as L-shaped steel is used for the brace 23, and shaped steel such as a channel material is used for the connecting material 24.

In the present embodiment, the load borne by the pier 1 is only the weight of the pipe 3 and the worker, and the pier 1 can be a simple one mainly made of steel as described above. Therefore, the span of the pile 21 can be increased, and the pile 21 can be arranged according to the positions of the piers D1 to D4 of the existing bridge D. It is possible to prevent driftwood and dust from getting caught and causing floods when the flow rate increases.

As described above, in the present embodiment, a pier 1 is constructed in the water area B, and concrete is placed using the pipe 3 arranged on the pier 1 to provide structures such as piers C1 to C4 in the water area B. To construct. As a result, in the present embodiment, it is possible to carry out the construction by the usual constant placing method regardless of the ship. Further, since the pipe 3 is arranged on the pier 1, concrete can be placed regardless of the flow of the river, and the worker on the pier 1 can deal with it even when the pipe 3 is blocked. Further, where the worker usually goes to the construction site by a communication ship, the worker can go on foot on the pier 1, so that the cost related to the communication ship is reduced and the construction site can be reached at any time.

Further, in the present embodiment, the pump vehicle does not need to move on the pier 1, and the load applied to the pier 1 is only the weight of the pipe 3 and the worker. Therefore, the pier 1 is provided with the passage girder 11 by the steel pile 21. It can be made simple by providing a scaffolding plate 13 on the passage girder 11 in support of the passage girder, and the configuration becomes simple. Therefore, the time and cost required for constructing the pier 1 can be reduced.

Further, in the present embodiment, in the replacement work of the existing bridge D, the piers C1 to C4 of the new bridge and the foundation portion thereof are constructed of concrete, so that the pier 1 extends along the existing bridge D to the water area B. It will be provided.

Further, since the pile 21 is arranged at a position corresponding to the piers D1 to D4 of the existing bridge D on the downstream side of the existing bridge D, it is possible to prevent the river load inhibition rate from increasing due to the pile 21 of the pier 1. can. As described above, in the present embodiment, the load applied to the pier 1 is small and the pier can be configured in a simple manner, so that the span of the pile 21 can be increased to about three times the normal span, and the position of the piers D1 to D4 of the existing bridge D can be increased. It is also easy to align.

However, the present invention is not limited to the above embodiment. For example, in the present embodiment, in the replacement work of the existing bridge D, the piers C1 to C4 of the new bridge and the foundation portion thereof are constructed of concrete, but the structure constructed by the method of the present embodiment is not limited to this. It may be constructed by placing concrete in water areas such as rivers, seas, and lakes.

Further, in the present embodiment, the span of the pile 21 corresponds to the span of the piers D1 to D4 of the existing bridge D, but some or all the spans may be the length of a plurality of spans of the piers D1 to D4. The span can be increased in rigidity by providing a truss structure on the pier 1 to reinforce it, or by increasing the thickness of the H-shaped steel of the passage girder 11.

Further, the configuration of the pier 1 is not limited to the above, and the planar shape thereof is not limited to the one extending linearly as shown in FIG. 1 (a). The pipe 3 can be branched and extended according to the planar shape of the pier 1 by connecting the pipe 3 with a joint or the like.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that a person skilled in the art can come up with various modified or modified examples within the scope of the technical idea disclosed in the present application, and these also naturally belong to the technical scope of the present invention. Understood.

1: Pier 3: Pier 10: Passage 11: Passage girder 12: Connecting material 13: Scaffold plate 14: Enclosure 20: Support part 21: Pile 22: Support beam 23: Brace 24: Connecting material c1 to c4: (New bridge) ) Pier positions C1-C4: (new bridge) pier D: existing bridge D1-D4: (existing bridge) pier

Claims (3)

A pier for arranging concrete casting pipes is constructed in the water area so as to extend along the existing bridge, and the pipes arranged so as to extend along the pier are used on the sides of the pier. A method for constructing a structure, which is characterized by placing concrete at the pier position of a new bridge in a water area to construct the structure. The method for constructing a structure according to claim 1, wherein the pier supports a passage girder with steel piles and a plate material is provided on the passage girder. The pier is located on the downstream side of the existing bridge in the river.
The method for constructing a structure according to claim 1 or 2 , wherein the pile of the pier is arranged at a position corresponding to a pier of the existing bridge on the downstream side of the existing bridge.

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