JP7331157B2 - How to build structures - Google Patents

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JP7331157B2
JP7331157B2 JP2022000103A JP2022000103A JP7331157B2 JP 7331157 B2 JP7331157 B2 JP 7331157B2 JP 2022000103 A JP2022000103 A JP 2022000103A JP 2022000103 A JP2022000103 A JP 2022000103A JP 7331157 B2 JP7331157 B2 JP 7331157B2
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pier
bridge
concrete
positions
piles
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JP2022033251A (en
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弘晴 向
直彦 岡
昌史 文村
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Kajima Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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Description

本発明は、水域における構造物の構築方法に関する。 The present invention relates to a method of constructing a structure in a body of water.

河川において橋脚などの構造物を構築するためにコンクリートを打設する方法として、コンクリートプラント船を用いる、生コン車から台船上のポンプ車にコンクリートを受け渡して台船上のポンプ車からコンクリートを打設する、生コンホッパーを台船に載せて台船上のポンプ車からコンクリートを打設する、水面に配管を浮かべ当該配管を用いてコンクリートを打設する、などの方法がある。 As a method of pouring concrete to construct structures such as bridge piers in rivers, a concrete plant ship is used. , placing a ready-mixed cone hopper on a barge and pouring concrete from a pump car on the barge, and placing a pipe on the surface of the water and using the pipe to pour concrete.

また特許文献１には、コンクリートを打設して河川に橋脚基礎を構築するために、橋脚位置の近傍に仮設桟橋を設け、この仮設桟橋上をポンプ車が走行するようにしたものが記載されている。 Further, Patent Document 1 describes a structure in which a temporary pier is provided in the vicinity of the position of the pier in order to cast concrete and build a pier foundation in the river, and a pump truck runs on this temporary pier. ing.

特開2002-146811号公報JP-A-2002-146811

しかしながら、コンクリートプラント船は大掛かりになり、施工場所に行くまでの航路に橋があるとその下を通過できない等の問題がある。また台船上のポンプ車からコンクリートを打設する場合には時間経過によるコンクリートの品質低下の問題が生じる。例えば生コン車の乗船降船に時間がかかるとスランプロスが大きくなり、生コンホッパーでは時間経過によりホッパー内で生コンが降下しスランプが小さくなる。またコンクリートプラント船や台船などの船舶を用いる場合、河川の流れと直交して航行するのも困難である。 However, the concrete plant ship is large-scaled, and if there is a bridge on the route to the construction site, there are problems such as being unable to pass under it. Moreover, when pouring concrete from a pump car on a barge, the quality of the concrete deteriorates over time. For example, if it takes a long time to get on and off the ready-mixed concrete truck, the slump loss will increase. Moreover, when using a ship such as a concrete plant ship or barge, it is difficult to navigate perpendicularly to the flow of the river.

一方、水面に配管を浮かべてコンクリートを打設する場合や特許文献１のように仮設桟橋を用いる場合、上記のような問題は少ない。しかしながら、水面に配管を浮かべる場合、河川の流れが速いとコンクリートの打設ができない。また長距離圧送が必要になるので配管が閉塞する可能性が高く、その時対処できないという問題もある。また、特許文献１の方法では仮設桟橋上をポンプ車が走行するので、仮設桟橋としてある程度の強度を有する大掛かりなものが必要になり、その構築に掛かる時間やコストが大きくなる。 On the other hand, when concrete is cast with pipes floating on the surface of water, or when a temporary pier is used as in Patent Document 1, the above problems are less likely to occur. However, when a pipe floats 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 clogged, and there is also a problem that it cannot be dealt with at that time. In addition, in the method of Patent Document 1, since the pump truck runs on the temporary pier, a large-scale temporary pier with a certain level of strength is required, which increases the time and cost required for construction.

本発明は上記の問題に鑑みてなされたものであり、水域でのコンクリート打設による構造物の構築を簡易に行うことができる構造物の構築方法を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a method of constructing a structure that can easily construct a structure by placing concrete in a water area.

前述した課題を解決するための本発明は、コンクリート打設用の配管を配置するための桟橋を水域に構築し、前記桟橋に沿って延伸するように配置された前記配管を用いて前記桟橋の側方の水域でコンクリートを打設し、構造物を構築する構造物の構築方法であって、前記構造物の位置は、前記桟橋の橋軸方向に間隔を空けて定められ、前記桟橋の杭の位置が、前記構造物の位置に対応し、前記構造物の間の位置では、前記杭が設けられないことを特徴とする構造物の構築方法である。 In order to solve the above-mentioned problems, the present invention constructs a pier for arranging pipes for placing concrete in a water area, and uses the pipes arranged so as to extend along the pier. A structure construction method for constructing a structure by placing concrete in a water area on the side, wherein the positions of the structures are determined at intervals in the axial direction of the pier, and the piles of the pier are positioned. correspond to the positions of the structures, and the piles are not provided at positions between the structures .

本発明では、河川等の水域に桟橋を構築し、この桟橋に配置した配管を用いてコンクリートを打設することで水域に構造物を構築する。本発明ではコンクリートの打設時に船舶が不要となり、また桟橋に配管を配置するので河川の流れに関係なくコンクリートを打設でき、配管の閉塞時などでも桟橋上の作業員が対処できる。また桟橋上をポンプ車が移動する必要もなく、桟橋に加わる荷重は配管と作業員の重量だけで済むので桟橋の構成も簡易なものとできる。 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 pipes arranged on the pier. The present invention eliminates the need for a ship when pouring concrete, and since the pipes are placed on the pier, the concrete can be placed regardless of the flow of the river, and workers on the pier can deal with blockages of the pipes. In addition, there is no need to move the pump truck on the pier, and the load applied to the pier is only the weight of the pipes and workers, so the structure of the pier can be simplified.

前記桟橋は、例えば鋼製の前記杭により通路桁を支持し、前記通路桁の上に、作業員が移動する通路面を構成する足場板を設けたものであり、前記配管は、前記足場板の上に配置される。
前記したように桟橋は簡易な構成で済み、上記のようにシンプルなものとしてその構築に掛かる時間やコストを小さくできる。 The pier, for example, supports a passage girder with the steel piles, and is provided with scaffolding boards on the passage girder that constitute a passage surface for workers to move. placed on the board .
As described above, the pier can have a simple structure, and the time and cost required for its construction can be reduced by making it simple as described above.

前記桟橋は、既設橋梁に沿って水域に延びるように設けられ、前記コンクリートは、新設橋梁の橋脚位置で打設されることが望ましい。
これにより、既設橋梁の架け替え工事において、新設橋梁の橋脚やその基礎部分をコンクリートにより構築できる。 It is desirable that the pier is provided so as to extend along the existing bridge to the water area, and the concrete is placed at the pier position of the new bridge.
As a result, in the replacement work of the existing bridge, the piers and foundations of the new bridge can be constructed with concrete.

前記桟橋は、例えば河川において既設橋梁の下流側に配置され、前記桟橋の杭が、既設橋梁の下流側において、既設橋梁の橋脚に対応する位置に配置される。
これにより、桟橋の杭によって河積阻害率が増加するのを防ぐことができる。本発明では桟橋に加わる荷重が小さく桟橋を簡易な構成とできるので、杭のスパンを大きくしその位置を既設橋梁の橋脚の位置に合わせるのも容易である。 The pier is arranged, for example, on the downstream side of an existing bridge in a river, and the piles of the pier are arranged at positions corresponding to the piers of the existing bridge on the downstream side of the existing bridge.
As a result, it is possible to prevent an increase in the river cross-section obstruction rate due to the pier piles. In the present invention, since the load applied to the pier is small and the pier can be constructed simply, it is easy to increase the span of the piles and match their positions with the positions of the piers of the existing bridge.

本発明により、水域でのコンクリート打設による構造物の構築を簡易に行うことができる構造物の構築方法を提供できる。 INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a method for constructing a structure that can easily construct a structure by placing concrete in a water area.

橋脚位置ｃ１～ｃ４を示す図。The figure which shows the bridge pier positions c1-c4. 桟橋１を示す図。The figure which shows the pier 1. FIG. 桟橋１を示す図。The figure which shows the pier 1. FIG. 桟橋１を示す図。The figure which shows the pier 1. FIG.

以下、図面に基づいて本発明の好適な実施形態について詳細に説明する。 Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

（１．水域における橋脚Ｃ１～Ｃ４の構築）
図１（ａ）は、本発明の実施形態に係る構築方法により構築される構造物である橋脚の位置（以下、橋脚位置という）ｃ１～ｃ４を示す図であり、図１（ｂ）は橋脚位置ｃ１～ｃ４のそれぞれで構築される橋脚Ｃ１～Ｃ４の概略を示す図である。 (1. Construction of piers C1 to C4 in the water area)
FIG. 1(a) is a diagram showing positions c1 to c4 of bridge piers (hereinafter referred to as pier positions) that are structures constructed by a construction method according to an embodiment of the present invention, and FIG. 1(b) shows piers. FIG. 4 is a diagram showing an outline of bridge piers C1 to C4 constructed at positions c1 to c4, respectively;

橋脚Ｃ１～Ｃ４は、既設橋梁Ｄの架け替え工事として既設橋梁Ｄの近傍に構築される新設橋梁の橋脚である。新設橋梁は既設橋梁Ｄの延伸方向に沿って設けられ、その橋脚位置ｃ１～ｃ４も既設橋梁Ｄの延伸方向に沿って計画される。 Bridge piers C1 to C4 are piers of a new bridge constructed near the existing bridge D as a replacement work for the existing bridge D. The new bridge will be installed along the extension direction of the existing bridge D, and its pier positions c1 to c4 will also be planned along the extension direction of the existing bridge D.

既設橋梁Ｄおよび上記の新設橋梁は河岸Ａ（陸）から延びて河川の水域Ｂを横断するように設けられ、既設橋梁Ｄはその延伸方向に所定のスパンで設けられた橋脚Ｄ１～Ｄ４を有する。 The existing bridge D and the above-mentioned new bridge extend from the riverbank A (land) and are provided so as to cross the water area B of the river, and the existing bridge D has piers D1 to D4 provided with a predetermined span in the extending direction. .

図１（ａ）の矢印ｂは河川の流れ方向を示し、橋脚位置ｃ１～ｃ４はそれぞれ、既設橋梁Ｄの橋脚Ｄ１～Ｄ４の下流側に対応する。 Arrow b in FIG. 1(a) indicates the direction of river flow, and pier positions c1 to c4 correspond to the downstream side of piers D1 to D4 of existing bridge D, respectively.

本実施形態では、水域Ｂにある橋脚位置ｃ１～ｃ４のそれぞれでコンクリートを打設し、橋脚Ｃ１～Ｃ４やその基礎部分を構築する。そしてこの際、図１（ａ）に示すように簡易な仮設の桟橋１を構築し、その上にコンクリート打設用の配管３を設ける。 In this 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 their foundations. At this time, a simple temporary pier 1 is constructed as shown in FIG.

配管３は河岸Ａから桟橋１に沿って延伸するように配置され、この配管３内でコンクリートを圧送し、桟橋１の側方の水域Ｂにある橋脚位置ｃ１～ｃ４のそれぞれでコンクリートを打設する。コンクリート打設に係る管理は桟橋１上の作業員が行い、例えば配管３の閉塞などへの対処を行う。 The pipe 3 is arranged to extend from the riverbank A along the pier 1, concrete is pumped in this 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. Concrete placement is managed by workers on the pier 1, and, for example, a blockage of the pipe 3 is dealt with.

桟橋１は、既設橋梁Ｄおよび構築予定の新設橋梁の近傍で、これらの橋梁の延伸方向に沿って河岸Ａから延びるように設けられる。本実施形態の桟橋１は、既設橋梁Ｄの下流側で、既設橋梁Ｄと新設橋梁の間に配置される。図１（ａ）の符号３１は配管３から分岐する分岐部であり、図の例では橋脚位置ｃ１でコンクリートを打設するため配管３から分岐する分岐部３１を設けている。 A jetty 1 is provided near an existing bridge D and a new bridge to be constructed so as to extend from a riverbank A along the extending direction of these bridges. The pier 1 of this embodiment is arranged downstream of the existing bridge D and between the existing bridge D and the new bridge. Reference numeral 31 in FIG. 1(a) denotes a branching portion branching from the pipe 3. In the example shown in the figure, the branching portion 31 branching from the pipe 3 is provided for placing concrete at the pier position c1.

（２．桟橋１）
図２～図４は桟橋１の橋軸方向の一部を示す図であり、図２は桟橋１を側方から見た図、図３は桟橋１を上方から見た図、図４は桟橋１の橋軸方向と直交する鉛直面を見た図である。なお橋軸方向は図２、３の左右方向および図４の紙面法線方向に対応する。 (2. Pier 1)
2 to 4 are diagrams showing a part of the pier 1 in the axial direction. FIG. 2 is a side view of the pier 1, FIG. 3 is a top view of the pier 1, and FIG. 4 is a pier. It is the figure which looked at the vertical plane orthogonal to the bridge axis direction of 1. FIG. Note that the direction of the bridge axis corresponds to the left-right direction in FIGS.

桟橋１は、橋脚位置ｃ１～ｃ４にてコンクリートを打設する際に、作業員の移動と配管３の配置を行うスペースを水上で確保するために設けられる。 The pier 1 is provided to secure a space on the water for moving workers and arranging the pipes 3 when concrete is placed at the pier positions c1 to c4.

桟橋１は、水上に架設される通路部分１０と、通路部分１０を水底の地盤から支持する支持部分２０とを有する。通路部分１０と支持部分２０は主に鋼材によって構成される。 The pier 1 has a passage portion 10 constructed over water and a support portion 20 for supporting the passage portion 10 from the ground of the water bottom. The passage portion 10 and the support portion 20 are mainly made of steel.

通路部分１０は、通路桁１１、足場板１３、囲い１４等を有する。 The passage portion 10 has passage beams 11, scaffolding boards 13, enclosures 14, and the like.

通路桁１１は橋軸方向に設けられる桁材であり、例えば複数のＨ形鋼の部材軸方向の端部同士を添接板等で接続して用いる。通路桁１１は、台船上に載せたＨ形鋼等の資材をクレーンで設置するなどして形成される。 The passage girder 11 is a girder member provided in the bridge axis direction, and is used, for example, by connecting the ends of a plurality of H-shaped steel members in the axial direction with a splicing plate or the like. The passage girder 11 is formed by installing materials such as H-shaped steel placed on a barge with a crane.

本実施形態では一対の通路桁１１が平行するように配置され、これらの通路桁１１が橋軸直交方向の連結材１２により連結される。橋軸直交方向は橋軸方向と平面において直交する方向であり、図２の紙面法線方向、図３の上下方向、および図４の左右方向に対応する。 In this embodiment, a pair of passage girders 11 are arranged in parallel, and these passage girders 11 are connected by connecting members 12 in the direction perpendicular to the bridge axis. The direction perpendicular to the bridge axis is a direction perpendicular to the direction of the bridge axis in a plane, and corresponds to the direction normal to the paper surface of FIG. 2, the vertical direction of FIG. 3, and the horizontal direction of FIG.

足場板１３は通路桁１１上に配置される板材であり、作業員が移動し、且つ配管３が配置される通路面を構成する。なお足場板１３の両側には橋軸方向に沿った巾木（不図示）も設けられる。 The scaffolding board 13 is a board material arranged on the passage girder 11, and constitutes a passage surface on which workers move and the pipe 3 is arranged. Baseboards (not shown) along the bridge axis direction are also provided on both sides of the scaffold board 13 .

囲い１４は鋼管等を格子状に組んで通路部分１０の両側および上空を覆うように配置される。 The enclosure 14 is arranged to cover both sides of the passage portion 10 and the sky by assembling steel pipes or the like in a grid pattern.

支持部分２０は、杭２１、支持梁２２、ブレース２３、繋ぎ材２４等を有する。 The support portion 20 has piles 21, support beams 22, braces 23, tie members 24, and the like.

杭２１は鋼製のものであり、Ｈ形鋼などの形鋼を水底の地盤に打設して形成される。杭２１は橋軸方向に沿って所定のスパンで配置される。図１（ａ）の符号ａは桟橋１において杭２１が設けられる位置を示したものであり、杭２１の橋軸方向の位置は既設橋梁Ｄの橋脚Ｄ１～Ｄ４の位置に対応する。例えば既設橋梁Ｄの橋脚Ｄ１～Ｄ４のスパンが16mの場合、杭２１のスパンも同じ16mとなる。 The pile 21 is made of steel, and is formed by driving shaped steel such as H-shaped steel into the ground of the sea bottom. The piles 21 are arranged with a predetermined span along the bridge axis direction. Reference character a in FIG. 1(a) indicates the position where the pile 21 is provided on the pier 1, and the position of the pile 21 in the bridge axis direction corresponds to the positions of the piers D1 to D4 of the existing bridge D. As shown in FIG. For example, if the span of the piers D1 to D4 of the existing bridge D is 16m, the span of the pile 21 is also 16m.

杭２１は橋軸直交方向に一対設けられ、これらの杭２１の上端部の間に支持梁２２が架け渡される。支持梁２２の上には通路桁１１が載置され、杭２１は支持梁２２を介して通路桁１１を支持する。支持梁２２にはチャンネル材等の形鋼が用いられる。支持梁２２は杭２１の橋軸方向の前後両面に取付けられる。 A pair of piles 21 are provided in the direction perpendicular to the bridge axis, and a support beam 22 is bridged between the upper ends of these piles 21 . The passage girder 11 is placed on the support beams 22 , and the piles 21 support the passage girder 11 via the support beams 22 . Shaped steel such as channel material is used for the support beams 22 . The support beams 22 are attached to both front and rear surfaces of the piles 21 in the bridge axis direction.

橋軸直交方向の一対の杭２１の間には、ブレース２３や繋ぎ材２４も設けられる。ブレース２３は支持梁２２の下方で杭２１間を繋ぐように設けられた斜材であり、杭２１の橋軸方向の前後両面に取付けられたブレース２３がＸ字状に配置される。繋ぎ材２４はブレース２３の下方且つ水上で杭２１間を繋ぐように水平方向に設けられる。ブレース２３にはＬ型鋼などの形鋼が用いられ、繋ぎ材２４にはチャンネル材などの形鋼が用いられる。 A brace 23 and a connecting member 24 are also provided between a pair of piles 21 in the direction perpendicular to the bridge axis. The braces 23 are diagonal members provided to connect the piles 21 below the support beams 22, and the braces 23 attached to both front and rear surfaces of the piles 21 in the bridge axis direction are arranged in an X shape. A connecting member 24 is provided horizontally so as to connect the piles 21 below the brace 23 and above the water. 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 joint material 24 .

本実施形態では、桟橋１が負担する荷重が配管３と作業員の重量のみであり、上記のように桟橋１を主に鋼材によって構成された簡易なものとできる。そのため杭２１のスパンを大きくでき、既設橋梁Ｄの橋脚Ｄ１～Ｄ４の位置に合わせて杭２１を配置することが可能になり、杭２１によって河積阻害率が増加することがなく、大雨などで流量が増加した際に流木やゴミなどがひっかかり洪水の原因になるのを防ぐことができる。 In this embodiment, the load borne by the pier 1 is only the weight of the pipes 3 and the workers, and as described above, the pier 1 can be made simple and mainly made of steel. Therefore, the span of the piles 21 can be increased, and the piles 21 can be arranged according to the positions of the piers D1 to D4 of the existing bridge D. It can prevent driftwood, garbage, etc. from getting caught and causing flooding when the flow increases.

以上説明したように、本実施形態では水域Ｂに桟橋１を構築し、この桟橋１上に配置した配管３を用いてコンクリートを打設することで水域Ｂに橋脚Ｃ１～Ｃ４等の構造物を構築する。これにより、本実施形態では船舶によらず通常のコンリート打設方法での施工が可能になる。また桟橋１上に配管３を配置するので河川の流れに関係なくコンクリートを打設でき、配管３の閉塞時などでも桟橋１上の作業員が対処できる。さらに、通常施工場所まで作業員が通信船で行くところ、作業員が桟橋１上を徒歩で行くことができるので通信船に係る費用が削減され、またいつでも施工場所まで行くことができる。 As described above, in this embodiment, the pier 1 is constructed in the water area B, and concrete is poured using the pipes 3 arranged on the pier 1 to construct structures such as piers C1 to C4 in the water area B. To construct. As a result, in this embodiment, it is possible to perform construction by a normal concrete placing method regardless of the vessel. Further, since the pipe 3 is arranged on the pier 1, concrete can be placed regardless of the flow of the river, and workers on the pier 1 can deal with blockage of the pipe 3. In addition, workers can walk on the pier 1 instead of the workers who usually go to the construction site by communication ship, so that the cost for the communication ship can be reduced and the construction site can be reached at any time.

また本実施形態では桟橋１上をポンプ車が移動する必要もなく、桟橋１に加わる荷重は配管３と作業員の重量だけで済むので、桟橋１を、鋼製の杭２１により通路桁１１を支持して通路桁１１上に足場板１３を設けたシンプルなものとでき、その構成が簡易になる。そのため、桟橋１の構築に掛かる時間やコストを小さくできる。 Further, in this embodiment, there is no need for the pump truck to move on the pier 1, and the load applied to the pier 1 is only the weight of the pipes 3 and the workers. The structure can be made simple by providing a scaffolding board 13 on the passage girder 11 while supporting it, and the structure is simplified. Therefore, the time and cost required for constructing the pier 1 can be reduced.

また本実施形態では、既設橋梁Ｄの架け替え工事において、新設橋梁の橋脚Ｃ１～Ｃ４やその基礎部分をコンクリートにより構築しており、そのため桟橋１は既設橋梁Ｄに沿って水域Ｂに延びるように設けられる。 In this embodiment, in the replacement work of the existing bridge D, the piers C1 to C4 of the new bridge and their foundations are made of concrete. be provided.

また、杭２１は、既設橋梁Ｄの下流側において、既設橋梁Ｄの橋脚Ｄ１～Ｄ４に対応する位置に配置されるので、桟橋１の杭２１によって河積阻害率が増加するのを防ぐことができる。前記したように本実施形態では桟橋１に加わる荷重が小さく桟橋を簡易な構成とできるので、杭２１のスパンは通常の3倍程度まで大きくでき、その位置を既設橋梁Ｄの橋脚Ｄ１～Ｄ４の位置に合わせるのも容易である。 In addition, since the piles 21 are arranged at positions corresponding to the piers D1 to D4 of the existing bridge D on the downstream side of the existing bridge D, the piles 21 of the pier 1 can prevent an increase in the river area obstruction rate. can. As described above, in this embodiment, the load applied to the pier 1 is small and the structure of the pier can be simplified. It is also easy to match the position.

しかしながら、本発明は上記の実施形態に限らない。例えば本実施形態では既設橋梁Ｄの架け替え工事において新設橋梁の橋脚Ｃ１～Ｃ４やその基礎部分をコンクリートにより構築しているが、本実施形態の方法で構築される構造物はこれに限らず、河川や海、湖などの水域にコンクリートを打設して構築されるものであればよい。 However, the invention is not limited to the above embodiments. For example, in the present embodiment, the bridge piers C1 to C4 of the new bridge and their foundations are constructed of concrete in the replacement work of the existing bridge D, but the structure constructed by the method of the present embodiment is not limited to this. It may be constructed by placing concrete in a water area such as a river, the sea, or a lake.

また本実施形態では杭２１のスパンが既設橋梁Ｄの橋脚Ｄ１～Ｄ４のスパンに対応するが、一部あるいは全てのスパンを橋脚Ｄ１～Ｄ４の複数スパン分の長さとしてもよい。そのスパンについては桟橋１にトラス構造を設けて補強したり、通路桁１１のＨ形鋼のせいを大きくするなどして剛性を高くすることもできる。 In this embodiment, the span of the pile 21 corresponds to the span of the piers D1 to D4 of the existing bridge D, but part or all of the span may be the length of multiple spans of the piers D1 to D4. The span can be reinforced by providing the pier 1 with a truss structure, or the H-shaped steel of the passage girder 11 can be increased to increase the rigidity.

また桟橋１の構成も前記に限らず、その平面形状も図１（ａ）のように直線状に延びるものに限らない。配管３は、ジョイント等により接続するなどして桟橋１の平面形状に応じて分岐、延長させることができる。 Further, the configuration of the pier 1 is not limited to the above, and the planar shape thereof is not limited to that extending linearly as shown in FIG. 1(a). The pipe 3 can be branched or extended according to the planar shape of the pier 1 by connecting with a joint or the like.

以上、添付図面を参照して、本発明の好適な実施形態について説明したが、本発明は係る例に限定されない。当業者であれば、本願で開示した技術的思想の範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。 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 such examples. It is obvious that a person skilled in the art can conceive of various modifications or modifications within the scope of the technical ideas disclosed in the present application, and these also belong to the technical scope of the present invention. Understood.

１：桟橋
３：配管
１０：通路部分
１１：通路桁
１２：連結材
１３：足場板
１４：囲い
２０：支持部分
２１：杭
２２：支持梁
２３：ブレース
２４：繋ぎ材
ｃ１～ｃ４：（新設橋梁の）橋脚位置
Ｃ１～Ｃ４：（新設橋梁の）橋脚
Ｄ：既設橋梁
Ｄ１～Ｄ４：（既設橋梁の）橋脚 1: Pier 3: Piping 10: Passage part 11: Passage girder 12: Connecting material 13: Scaffold board 14: Enclosure 20: Support part 21: Pile 22: Support beam 23: Brace 24: Tie material c1 to c4: (New bridge No) Pier position C1 to C4: Pier D (of new bridge): Existing bridge D1 to D4: Pier (of existing bridge)

Claims (2)

コンクリート打設用の配管を配置するための桟橋を水域に構築し、前記桟橋に沿って延伸するように配置された前記配管を用いて前記桟橋の側方の水域でコンクリートを打設し、構造物を構築する構造物の構築方法であって、
前記構造物の位置は、前記桟橋の橋軸方向に間隔を空けて定められ、
前記桟橋の杭の位置が、前記構造物の位置に対応し、前記構造物の間の位置では、前記杭が設けられないことを特徴とする構造物の構築方法。 A pier is constructed in a water area for arranging pipes for placing concrete, and concrete is poured in the water area on the side of the pier using the pipes arranged so as to extend along the pier. A method of constructing a structure for constructing an object,
The positions of the structures are determined at intervals in the bridge axis direction of the pier,
A method of constructing a structure, wherein the positions of the piles of the pier correspond to the positions of the structures, and the piles are not provided at positions between the structures. 前記桟橋は、鋼製の前記杭により通路桁を支持し、前記通路桁の上に、作業員が移動する通路面を構成する足場板を設けたものであり、
前記配管は、前記足場板の上に配置されたことを特徴とする請求項１記載の構造物の構築方法。 The pier supports a passage girder with the steel piles, and has a scaffolding plate on the passage girder that constitutes a passage surface for workers to move ,
2. The method of constructing a structure according to claim 1, wherein the piping is arranged on the scaffold board .
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近畿地方整備局 紀南河川国道事務所，新宮紀宝道路熊野川河口大橋Ｐ１－Ｐ３ 下部工事設計図面，2018年03月13日，21,24,33,45,46,47

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