JP7437270B2 - Bridge construction method - Google Patents

Bridge construction method Download PDF

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JP7437270B2
JP7437270B2 JP2020145416A JP2020145416A JP7437270B2 JP 7437270 B2 JP7437270 B2 JP 7437270B2 JP 2020145416 A JP2020145416 A JP 2020145416A JP 2020145416 A JP2020145416 A JP 2020145416A JP 7437270 B2 JP7437270 B2 JP 7437270B2
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pier
piles
guide material
bridge
guide
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JP2022040625A (en
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正典 松浦
隆一郎 中村
恵史 三室
行博 中谷
淳一 卜部
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Kajima Corp
Hirose and Co Ltd
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Hirose and Co Ltd
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Description

本発明は、橋梁構築方法に関する。 The present invention relates to a bridge construction method.

特許文献1には、山岳部などで桟橋を施工する方法として、ガイド材を桟橋の既設スパン部分から延設し、このガイド材の中間部で橋脚の後部の杭を打設するとともに、ガイド材の前部で橋脚の前部の杭をさらに打設することで、平面において三角形の頂点にあたる位置に配置された3本の杭による橋脚を構築することが記載されている。 Patent Document 1 describes a method for constructing a pier in a mountainous area, etc., in which a guide material is extended from the existing span part of the pier, a pile at the rear of the pier is driven in the middle part of the guide material, and the guide material is It is described that by driving additional piles at the front of the pier at the front of the pier, a pier with three piles placed at the vertices of a triangle in a plane is constructed.

特開2019-131978号公報Japanese Patent Application Publication No. 2019-131978

特許文献1では、隣り合う杭の間にブレースを設けるため、杭で囲まれた平面三角形状の範囲に作業用のゴンドラを吊り降ろす。当該範囲にガイド材が残ったままだとゴンドラの吊り降ろしに干渉するので、特許文献1では、クレーンでガイド材を吊りつつこれを後退させ、上記範囲から事前に退避する。しかしながら、この退避作業は難しく、施工性の面で課題があった。 In Patent Document 1, in order to provide a brace between adjacent piles, a work gondola is lowered into a planar triangular area surrounded by the piles. If the guide material remains in the area, it will interfere with the hoisting and unloading of the gondola, so in Patent Document 1, the guide material is suspended by a crane and is moved backward to evacuate the area in advance. However, this evacuation work was difficult and there were issues in terms of workability.

本発明は上記の問題に鑑みてなされたものであり、桟橋等を容易に構築できる橋梁構築方法を提供することを目的とする。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a bridge construction method that can easily construct piers and the like.

前述した課題を解決するための本発明は、橋梁の既設部分の前方に、根元部と着脱部を有するガイド材を延ばすように、前記既設部分に前記ガイド材を取付ける工程(a)と、前記ガイド材を足場として前記ガイド材の長手方向の中間部と前部で橋脚の杭を打設する工程(b)と、前記既設部分から前記橋脚の上に橋梁の床部を架設する工程(c)と、を繰り返すことで橋梁を構築し、前記杭が合わせて3本以上存在し、各杭が平面において多角形の各頂点となる位置にあり、前記工程(b)で各杭の打設を行った後、前記ガイド材において前記各杭で囲まれた範囲に位置する前記着脱部を取り外し、当該着脱部を取り外した後の前記範囲に配置されるゴンドラを使用して隣り合う前記杭の間にブレースを設けることを特徴とする橋梁構築方法である。 The present invention for solving the above-mentioned problems includes a step (a) of attaching the guide material to the existing part of the bridge so as to extend the guide material having a root part and a detachable part in front of the existing part of the bridge ; Step (b) of driving the piles of the bridge pier at the middle and front portions of the guide material in the longitudinal direction using the guide material as a scaffold , and Step (c) of constructing the floor of the bridge from the existing portion onto the bridge pier. ), a bridge is constructed by repeating steps (b), and there are three or more piles in total, each pile is located at each vertex of a polygon in the plane, and each pile is driven in step (b). After performing this, remove the removable part located in the range surrounded by each of the piles in the guide material, and use the gondola located in the range after removing the removable part to connect the adjacent piles. This is a bridge construction method characterized by providing braces between the bridges.

本発明では、橋梁の既設部分からガイド材を延設し、その中間部と前部で橋脚の杭を打設することで、剛性の高い平面多角形状の橋脚を構築する。隣り合う杭の間にはブレースを設けるが、この際、前記のようにガイド材を後退させるのでなく、ガイド材の杭で囲まれた範囲に位置する部分を取り外すことで、ガイド材を当該範囲から容易に退避でき、ブレースの設置のために当該範囲で行われる作業との干渉を避けることができる。これにより、桟橋等の橋梁を容易に構築できる。 In the present invention, a highly rigid planar polygonal pier is constructed by extending guide members from an existing part of the bridge and driving pier piles at the intermediate and front portions of the guide members. A brace is provided between adjacent piles, but in this case, instead of retreating the guide material as described above, by removing the part of the guide material located in the area surrounded by the piles, the guide material can be moved into the area surrounded by the piles. can be easily evacuated from the area to avoid interference with work being carried out in the area for brace installation. Thereby, bridges such as piers can be easily constructed.

前記ガイド材から前記着脱部を取り外した後、前記ガイド材を前記既設部分から抜き取り、前記工程(a)において、抜き取った前記ガイド材に取り外した前記着脱部を取り付けて当該ガイド材を再利用することが望ましい。
これにより、前記の工程で構築した橋梁の部分を既設部分としてさらにその次の部分を構築する際に、上記ガイド材を転用できるようになる。
After removing the detachable part from the guide material, the guide material is extracted from the existing part, and in the step (a), the detachable part is attached to the extracted guide material to reuse the guide material. This is desirable.
This makes it possible to reuse the guide material when constructing the next part of the bridge using the existing part constructed in the above process.

また本発明では、杭で囲まれた範囲に配置したゴンドラを利用し、杭間にブレースを設置することにより、ブレースの設置作業を容易且つ安全に行うことができる。また、ゴンドラを配置する前にガイド材を上記範囲から退避しているので、ブレースの設置時にガイド材とゴンドラの干渉を防ぐことができる。 Further, in the present invention, by using gondolas placed in an area surrounded by piles and installing braces between the piles, the brace installation work can be performed easily and safely. Furthermore, since the guide material is evacuated from the above range before placing the gondola, it is possible to prevent interference between the guide material and the gondola when installing the brace.

本発明により、桟橋等を容易に構築できる橋梁構築方法を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the bridge construction method which can easily construct a pier etc. can be provided.

桟橋1を示す図。A diagram showing a pier 1. 桟橋1を示す図。A diagram showing a pier 1. 橋梁構築方法を示す図。A diagram showing a bridge construction method. 橋梁構築方法を示す図。A diagram showing a bridge construction method. 橋梁構築方法を示す図。A diagram showing a bridge construction method. 橋梁構築方法を示す図。A diagram showing a bridge construction method. 橋梁構築方法を示す図。A diagram showing a bridge construction method. 橋梁構築方法を示す図。A diagram showing a bridge construction method. 橋梁構築方法を示す図。A diagram showing a bridge construction method. 橋梁構築方法を示す図。A diagram showing a bridge construction method. 橋梁構築方法を示す図。A diagram showing a bridge construction method. 橋梁構築方法を示す図。A diagram showing a bridge construction method. 橋梁構築方法を示す図。A diagram showing a bridge construction method.

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。 Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.

(1.桟橋1)
図1、2は本発明の実施形態に係る橋梁構築方法で構築される桟橋1(橋梁)を示す図である。図1は桟橋1の斜視図である。図2(a)は桟橋1を上から見た図であり、図2(b)は桟橋1を側方から見た図である。
(1. Pier 1)
1 and 2 are diagrams showing a pier 1 (bridge) constructed by a bridge construction method according to an embodiment of the present invention. FIG. 1 is a perspective view of the pier 1. FIG. 2(a) is a diagram of the pier 1 viewed from above, and FIG. 2(b) is a diagram of the pier 1 viewed from the side.

図1、2に示すように桟橋1は複数のスパン部分10から構成され、図1、2ではその一部を示している。桟橋1の各スパン部分10は、橋脚3の上に主桁5を配置し、主桁5上に覆工板7を載せた構成を有する。主桁5および覆工板7は本発明において桟橋1の床部を構成する。 As shown in FIGS. 1 and 2, the pier 1 is composed of a plurality of span sections 10, only a part of which is shown in FIGS. Each span portion 10 of the pier 1 has a structure in which a main girder 5 is arranged on a pier 3 and a lining plate 7 is placed on the main girder 5. The main girder 5 and the lining plate 7 constitute the floor of the pier 1 in the present invention.

橋脚3は、平面において三角形の各頂点にあたる位置に配置された3本の杭31の間にブレース32を取付けた構成を有し、前部の2本の杭31の上部の間に仮受桁34が設けられ、当該2本の杭31と後部の1本の杭31の頂部の間に、床部(主桁5と覆工板7)を支持するためのV字状の受桁33が架け渡される。 The pier 3 has a structure in which a brace 32 is attached between three piles 31 arranged at positions corresponding to the vertices of a triangle in a plane, and a temporary support girder is installed between the upper parts of the two piles 31 at the front. 34 is provided, and a V-shaped support girder 33 for supporting the floor (main girder 5 and lining plate 7) is provided between the tops of the two piles 31 and the rear one pile 31. bridged.

また、V字状の受桁33の間には横桁35が架け渡され、後部の杭31の杭頭にはH形鋼等の鋼材37が配置される。上記の受桁33は鋼材37の上に載置される。本実施形態では上記の三角形が正三角形となっており、各方向からの外力に対し橋脚3がバランスよく抵抗できる。 Further, a cross beam 35 is spanned between the V-shaped support girders 33, and a steel member 37 such as an H-shaped steel is placed on the pile head of the rear pile 31. The support girder 33 described above is placed on the steel material 37. In this embodiment, the above-mentioned triangle is an equilateral triangle, and the pier 3 can resist external forces from each direction in a well-balanced manner.

主桁5は、隣り合う橋脚3の横桁35の上に架け渡すように設けられる。本実施形態では、桟橋1の幅方向(図2(a)の上下方向に対応する。以下桟橋幅方向という)に間隔を空けて4本の主桁5が設けられる。 The main girder 5 is provided so as to span over the cross beams 35 of the adjacent piers 3. In this embodiment, four main girders 5 are provided at intervals in the width direction of the pier 1 (corresponding to the vertical direction in FIG. 2A; hereinafter referred to as the pier width direction).

覆工板7は、桟橋幅方向の両側に配置される覆工板7aと、桟橋幅方向の中央部に配置される覆工板7bを含む。 The lining board 7 includes a lining board 7a arranged on both sides of the pier in the width direction, and a lining board 7b arranged in the center of the pier in the width direction.

(2.橋梁構築方法)
次に、図3~図13を参照して本発明の実施形態に係る橋梁構築方法について説明する。各図において、(a)は桟橋1を上から見た図であり、(b)は桟橋1を側方から見た図である。
(2. Bridge construction method)
Next, a bridge construction method according to an embodiment of the present invention will be described with reference to FIGS. 3 to 13. In each figure, (a) is a view of the pier 1 viewed from above, and (b) is a view of the pier 1 viewed from the side.

本実施形態では、まず図3に示すように、桟橋1の既設スパン部分10(既設部分)の前方にガイド桁20(ガイド材)を延ばすように、既設スパン部分10にガイド桁20を取付ける。 In this embodiment, first, as shown in FIG. 3, the guide girder 20 is attached to the existing span portion 10 of the pier 1 so that the guide girder 20 (guide material) extends forward of the existing span portion 10 (existing portion).

ここでは、既設スパン部分10の先端の橋脚3の受桁33と仮受桁34の間にガイド桁20の後部を挿入し、当該後部を受桁33と仮受桁34に仮固定する。仮固定にはブルマン(登録商標)などの狭締具を用いることができる。ガイド桁20は予め地組し、クレーン(不図示)によって吊り上げ、角度を調整しながら挿入する。なお、「後」とは既設スパン部分10側を指すものとし、「前」とはその逆側を指すものとする。 Here, the rear part of the guide girder 20 is inserted between the support girder 33 and the temporary support girder 34 of the bridge pier 3 at the tip of the existing span portion 10, and the rear part is temporarily fixed to the support girder 33 and the temporary support girder 34. A tightening tool such as Bulman (registered trademark) can be used for temporary fixation. The guide girder 20 is assembled on the ground in advance, lifted by a crane (not shown), and inserted while adjusting the angle. Note that "rear" refers to the existing span portion 10 side, and "front" refers to the opposite side.

ガイド桁20は、桟橋幅方向の両側に配置されたスパン方向(図3(a)、(b)の左右方向に対応する)の2本の鋼材21の前方に、同じく桟橋幅方向の両側に配置されたスパン方向の2本の鋼材23を設けた構成を有し、鋼材23の根元部23aが、鋼材21の前部の下に取付けられる。鋼材23は根元部23aとその前方の着脱部23bとに分割され、着脱部23bを根元部23aにボルト等で着脱可能に取り付けた構成となっている。 The guide girder 20 is placed in front of two steel members 21 in the span direction (corresponding to the left and right directions in FIGS. 3(a) and (b)) arranged on both sides of the pier in the width direction, and also on both sides of the pier in the width direction. It has a configuration in which two steel members 23 are arranged in the span direction, and the root portion 23a of the steel member 23 is attached under the front portion of the steel member 21. The steel material 23 is divided into a root portion 23a and a removable portion 23b in front of the root portion 23a, and the removable portion 23b is detachably attached to the root portion 23a with bolts or the like.

鋼材21の間には作業用の足場板22が設けられる。また、鋼材21の前方且つ鋼材23の根元部23aにあたる箇所に桟橋幅方向の横桁24が設けられる。 A scaffold board 22 for work is provided between the steel materials 21. Further, a cross beam 24 in the pier width direction is provided in front of the steel material 21 and at a location corresponding to the root portion 23a of the steel material 23.

次に、図4に示すように、桟橋1の既設スパン部分10の次スパン部分の橋脚の後部の杭31を、ガイド桁20の長手方向の中間部で打設する。杭31はガイド桁20の横桁24で位置決めし、当該横桁24の前で鋼材23の間に挿入する。杭31としては鋼管杭を用いるが、これに限ることはない。 Next, as shown in FIG. 4, the piles 31 at the rear of the piers of the next span section of the existing span section 10 of the pier 1 are driven in the middle part of the guide girder 20 in the longitudinal direction. The pile 31 is positioned by the cross beam 24 of the guide girder 20 and inserted between the steel members 23 in front of the cross beam 24. Although a steel pipe pile is used as the pile 31, it is not limited to this.

その後、杭31に取付けたブラケット50により、ガイド桁20を鋼材23の根元部23aにあたる部分で杭31に仮固定する。これにより、ガイド桁20を中間部で支持する。 Thereafter, the guide girder 20 is temporarily fixed to the pile 31 at a portion corresponding to the root portion 23a of the steel material 23 using the bracket 50 attached to the pile 31. Thereby, the guide girder 20 is supported at the intermediate portion.

本実施形態では、次に、図5に示すように、ガイド桁20の鋼材23の着脱部23bの間に作業用の足場板27を設け、桟橋1の次スパン部分の橋脚の前部の2本の杭31をガイド桁20の長手方向の前部で打設する。ここでは、当該前部に桟橋幅方向の2本の横桁25を設け、杭31は横桁25の先端の間で位置決めして当該先端の間に挿入する。横桁25の間には作業用の足場板26が配置されるが、横桁25の両端は足場板26から露出している。 In this embodiment, as shown in FIG. A book pile 31 is driven at the front part of the guide girder 20 in the longitudinal direction. Here, two cross beams 25 are provided in the front part of the pier in the width direction of the pier, and the piles 31 are positioned between the tips of the cross beams 25 and inserted between the tips. Scaffolding boards 26 for work are arranged between the crossbeams 25, and both ends of the crossbeams 25 are exposed from the scaffolding boards 26.

その後、3本の杭31の杭頭処理を行い、図6に示すようにガイド桁20の横桁25と足場板26を撤去し、3本の杭31の頂部に前記した受桁33を設置する。 Thereafter, the pile caps of the three piles 31 are treated, the cross beams 25 and scaffolding boards 26 of the guide girder 20 are removed as shown in FIG. do.

杭頭処理は受桁33の設置のため行われ、後部の杭31は、杭頭を切断した後でその頂部にH形鋼等の鋼材37を設置する。受桁33は2本の鋼材をV字型に突き合わせた部材であり、後部の杭31はそのV字の頂点に位置することから、上記の鋼材37はその上に載置する受桁33の載置可能範囲を広くとるために後部の杭31の頂部に設置している。ガイド桁20の鋼材23が鋼材21より一段下に配置されているのは、鋼材23間から当該杭31の杭頭を露出させ、この杭頭処理を容易に行えるようにするためである。 Pile cap processing is performed to install the support girder 33, and after cutting the pile cap of the rear pile 31, a steel material 37 such as an H-shaped steel is installed at the top. The support girder 33 is a member made by abutting two steel members in a V-shape, and since the rear pile 31 is located at the apex of the V-shape, the steel member 37 mentioned above is a member of the support girder 33 placed on it. It is installed at the top of the rear pile 31 in order to widen the mounting range. The reason why the steel members 23 of the guide girder 20 are arranged one step below the steel members 21 is to expose the pile heads of the piles 31 from between the steel members 23 so that the pile heads can be easily processed.

一方、前部の2本の杭31は、杭頭切断後、その頂部にプレート(不図示)を設置する。前記した足場板26は、杭頭処理を容易とするためこれらの杭31の杭頭より低い位置に設置されている(図5参照)。 On the other hand, after cutting the pile heads of the two front piles 31, a plate (not shown) is installed at the top. The scaffold board 26 described above is installed at a position lower than the pile caps of these piles 31 in order to facilitate pile cap processing (see FIG. 5).

その後、図7に示すように、3本の杭31で囲まれた範囲に位置する鋼材23の着脱部23bと着脱部23bの間の足場板27を取り外す。 Thereafter, as shown in FIG. 7, the scaffold board 27 between the detachable parts 23b of the steel material 23 located in the range surrounded by the three stakes 31 is removed.

そして、図8に示すように予め地組したゴンドラ42を3本の杭31で囲まれた範囲に配置する。ここでは、ゴンドラ42の吊降部41を受桁33の上に設置して固定し、ゴンドラ42は吊降部41からワイヤ43によって上記範囲に吊り降ろす。 Then, as shown in FIG. 8, a gondola 42 assembled in advance is placed in an area surrounded by three piles 31. Here, the hanging part 41 of the gondola 42 is installed and fixed on the support girder 33, and the gondola 42 is suspended from the hanging part 41 to the above range by the wire 43.

そして、図9に示すようにゴンドラ42を利用して隣り合う杭31の間にブレース32と仮受桁34を設置する。ゴンドラ42には、ブレース32等の取付のため、外側に延びる延長足場44が進退可能に設けられている。なお、ブレース32の設置はゴンドラ42を利用するものに限らず、その他の足場を用いて行ってもよい。 Then, as shown in FIG. 9, the braces 32 and the temporary support girders 34 are installed between the adjacent piles 31 using the gondolas 42. The gondola 42 is provided with an extension scaffold 44 that extends outward and is movable in order to attach the brace 32 and the like. Note that the installation of the brace 32 is not limited to the use of the gondola 42, and may be performed using other scaffolds.

この後、図10に示すようにゴンドラ42等を撤去し、受桁33上に横桁35を設置することで、既設スパン部分10の前方に次スパン部分の橋脚3が構築される。横桁35はV字状の受桁33の間に架け渡される。 Thereafter, as shown in FIG. 10, the gondola 42 and the like are removed and the cross beam 35 is installed on the support girder 33, so that the pier 3 of the next span section is constructed in front of the existing span section 10. The cross beam 35 is spanned between the V-shaped support beams 33.

また、図11に示すように、4本の主桁5を桟橋幅方向の両側に2本ずつ設置する。主桁5は、既設スパン部分10の橋脚3の横桁35から、上記で新たに設置した横桁35に架設される。 Further, as shown in FIG. 11, four main girders 5 are installed, two on each side of the pier in the width direction. The main girder 5 is constructed from the crossbeam 35 of the pier 3 of the existing span section 10 to the newly installed crossbeam 35 described above.

そして、図12に示すように、桟橋幅方向の両側の2本の主桁5の間に覆工板7aをそれぞれ設置し、覆工板7a間の隙間からガイド桁20を前方に抜き取る。ガイド桁20はクレーン(不図示)によって前方斜め上に角度をつけながら既設スパン部分10から抜き取る。なお、ガイド桁20は、抜き取り前に既設スパン部分10の橋脚3の受桁33と仮受桁34への仮固定、およびブラケット50による杭31への仮固定を解除し、足場板22や横桁24等を撤去しておく。 Then, as shown in FIG. 12, the lining plates 7a are respectively installed between the two main girders 5 on both sides in the width direction of the pier, and the guide girder 20 is extracted forward from the gap between the lining plates 7a. The guide girder 20 is extracted from the existing span portion 10 while being angled forward and upward by a crane (not shown). In addition, before removing the guide girder 20, the temporary fixation of the bridge pier 3 of the existing span section 10 to the support girder 33 and the temporary support girder 34, and the temporary fixation to the pile 31 by the bracket 50 are released, and Remove girder 24 etc.

その後、図13に示すように覆工板7aの間の隙間の上部に覆工板7bを設置し、手摺等(不図示)を取付けることで、桟橋1の次スパン部分10が構築される。抜き取ったガイド桁20は、鋼材23の着脱部23bを再度取り付けたうえで、次スパン部分10の橋脚3の受桁33と仮受桁34の間に後部を挿入し、仮固定することで、当該次スパン部分10を既設スパン部分10としてその次のスパン部分を構築する際に再利用することができる。前記の足場板22や横桁24はガイド桁20に再び取付けておく。 Thereafter, as shown in FIG. 13, the next span portion 10 of the pier 1 is constructed by installing the lining board 7b above the gap between the lining boards 7a and attaching a handrail or the like (not shown). The removed guide girder 20 is temporarily fixed by inserting the rear part between the support girder 33 and the temporary support girder 34 of the pier 3 of the next span section 10 after reattaching the detachable part 23b of the steel material 23. The next span section 10 can be reused as the existing span section 10 when constructing the next span section. The aforementioned scaffolding board 22 and cross beam 24 are reattached to the guide beam 20.

以下、図3~図13の工程を繰り返すことで、桟橋1が延長して構築されてゆく。なお、図示は省略しているが、前記した各工程では必要に応じて適当な箇所に仮設足場(不図示)が設けられる。 Thereafter, by repeating the steps shown in FIGS. 3 to 13, the pier 1 is extended and constructed. Although not shown in the drawings, temporary scaffolding (not shown) is provided at appropriate locations in each of the above-described steps as necessary.

以上説明したように、本実施形態によれば、桟橋1の既設スパン部分10からガイド桁20を延設し、その中間部と前部で橋脚3の杭31を打設することで、剛性の高い平面三角形状の橋脚3を構築する。隣り合う杭31の間にはブレース32を設けるが、この際、前記のようにガイド桁20を後退させるのでなく、ガイド桁20の杭31で囲まれた範囲に位置する部分(鋼材23の着脱部23b)を取り外すことで、ガイド桁20を当該範囲から容易に退避でき、ブレース32の設置のために当該範囲で行われる作業との干渉を避けることができる。これにより、桟橋1を容易に構築できる。 As explained above, according to the present embodiment, the guide girder 20 is extended from the existing span portion 10 of the pier 1, and the piles 31 of the pier 3 are driven at the intermediate and front portions of the guide girder 20, thereby increasing the rigidity. A tall triangular bridge pier 3 is constructed. A brace 32 is provided between adjacent piles 31, but in this case, instead of retracting the guide girder 20 as described above, the brace 32 is placed in the area of the guide girder 20 surrounded by the piles 31 (the attachment and detachment of the steel material 23). By removing the portion 23b), the guide girder 20 can be easily evacuated from the area, and interference with work performed in the area for installing the brace 32 can be avoided. Thereby, the pier 1 can be easily constructed.

特に本実施形態では、杭31で囲まれた範囲に配置したゴンドラ42を利用し、杭31間にブレース32を設置することにより、ブレース32の設置作業を容易且つ安全に行うことができる。前記のように、ガイド桁20はゴンドラ42を配置する前に上記範囲から退避しているので、ブレース32の設置時にガイド桁20とゴンドラ42の干渉を防ぐことができる。 In particular, in this embodiment, by using the gondolas 42 arranged in the range surrounded by the piles 31 and installing the braces 32 between the piles 31, the work of installing the braces 32 can be performed easily and safely. As described above, since the guide girder 20 is evacuated from the above range before placing the gondola 42, interference between the guide girder 20 and the gondola 42 can be prevented when the brace 32 is installed.

さらに本実施形態では、ガイド桁20を桟橋1の既設スパン部分10から抜き取った後、一旦取り外していた鋼材23の着脱部23bを再度取り付け、前記の工程で構築した桟橋1の次スパン部分10を既設スパン部分10としてさらにその次のスパン部分を構築する際に、ガイド桁20を転用できる。 Furthermore, in this embodiment, after the guide girder 20 is removed from the existing span section 10 of the pier 1, the detachable part 23b of the steel material 23 that was once removed is reattached, and the next span section 10 of the pier 1 constructed in the above process is installed. When constructing the next span section as the existing span section 10, the guide girder 20 can be reused.

しかしながら、本発明は以上の実施形態に限らない。例えば本実施形態では計3本の杭31が平面において三角形の各頂点にあたる位置に配置されており、これにより剛性の高い橋脚3を杭31の本数を最小限としつつ得ることができるが、橋脚3の構成は、3本以上の杭31を多角形の頂点にあたる位置に配置したものであればよく、特に限定されない。例えば4本の杭31から平面四角形状の橋脚3を構成することも可能であり、多角形の向きも様々に定めることができる。 However, the present invention is not limited to the above embodiments. For example, in this embodiment, a total of three piles 31 are arranged at positions corresponding to the vertices of a triangle in a plane, and as a result, a highly rigid bridge pier 3 can be obtained while minimizing the number of piles 31. The structure of No. 3 is not particularly limited as long as three or more stakes 31 are arranged at positions corresponding to the vertices of the polygon. For example, it is possible to construct a bridge pier 3 having a rectangular planar shape from four piles 31, and the orientation of the polygon can also be determined in various ways.

ガイド桁20は、このような杭31の配置のバリエーションに応じたものを用いればよく、杭31で囲まれた範囲に位置する部分が取り外し可能であればその構成は特に限定されない。 The guide girder 20 may be used in accordance with variations in the arrangement of the stakes 31, and its configuration is not particularly limited as long as the portion located within the range surrounded by the stakes 31 is removable.

また本発明は山岳部に限らず、その他の種々の位置に桟橋1を構築する際に適用することが可能である。さらに、桟橋1に限らずその他の橋梁を構築する際にも適用することが可能である。 Furthermore, the present invention is applicable not only to mountainous areas but also to the construction of piers 1 in various other locations. Furthermore, it can be applied not only to the pier 1 but also when constructing other bridges.

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 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 clear that those skilled in the art can come up with various changes or modifications within the scope of the technical idea disclosed in this application, and these naturally fall within the technical scope of the present invention. Understood.

1:桟橋
3:橋脚
5:主桁
7、7a、7b:覆工板
10:スパン部分
20:ガイド桁
21、23、37:鋼材
22、26、27:足場板
23a:根元部
23b:着脱部
24、25、35:横桁
31:杭
32:ブレース
33:受桁
34:仮受桁
42:ゴンドラ
50:ブラケット
1: Pier 3: Pier 5: Main girder 7, 7a, 7b: Lining plate 10: Span section 20: Guide girder 21, 23, 37: Steel material 22, 26, 27: Scaffolding board 23a: Root part 23b: Detachable part 24, 25, 35: Cross beam 31: Pile 32: Brace 33: Support girder 34: Temporary support girder 42: Gondola 50: Bracket

Claims (2)

橋梁の既設部分の前方に、根元部と着脱部を有するガイド材を延ばすように、前記既設部分に前記ガイド材を取付ける工程(a)と、
前記ガイド材を足場として前記ガイド材の長手方向の中間部と前部で橋脚の杭を打設する工程(b)と、
前記既設部分から前記橋脚の上に橋梁の床部を架設する工程(c)と、
を繰り返すことで橋梁を構築し、
前記杭が合わせて3本以上存在し、各杭が平面において多角形の各頂点となる位置にあり、
前記工程(b)で各杭の打設を行った後、前記ガイド材において前記各杭で囲まれた範囲に位置する前記着脱部を取り外し、当該着脱部を取り外した後の前記範囲に配置されるゴンドラを使用して隣り合う前記杭の間にブレースを設けることを特徴とする橋梁構築方法。
(a) attaching the guide material to the existing portion of the bridge so as to extend the guide material having a base portion and a removable portion in front of the existing portion;
a step (b) of driving pier piles at the middle and front portions of the guide material in the longitudinal direction using the guide material as a scaffold;
(c) constructing a bridge floor part from the existing part onto the bridge pier;
Build a bridge by repeating
There are three or more piles in total, and each pile is located at each vertex of a polygon in a plane,
After each pile is driven in the step (b), the removable part located in the range surrounded by each of the piles in the guide material is removed, and the removable part located in the range after removing the removable part is A method for constructing a bridge, characterized in that a gondola is used to provide a brace between the adjacent piles.
前記ガイド材から前記着脱部を取り外した後、前記ガイド材を前記既設部分から抜き取り、
前記工程(a)において、抜き取った前記ガイド材に取り外した前記着脱部を取り付けて当該ガイド材を再利用することを特徴とする請求項1記載の橋梁構築方法。
After removing the removable part from the guide material, extracting the guide material from the existing part,
2. The bridge construction method according to claim 1, wherein in the step (a), the removed guide material is reused by attaching the removed attachment/detachment portion to the extracted guide material.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001131938A (en) 1999-11-01 2001-05-15 Taisei Corp Construction method for launching pier
JP2012162862A (en) 2011-02-03 2012-08-30 Kouchi Marutaka:Kk Scaffold for pier construction and pier construction method
JP2015113581A (en) 2013-12-09 2015-06-22 株式会社横山基礎工事 Construction method of structure and support device
JP2016199956A (en) 2015-04-14 2016-12-01 新日鉄住金エンジニアリング株式会社 Bridge construction method
JP2017190607A (en) 2016-04-13 2017-10-19 ヒロセ株式会社 Erection method of simple temporary bridge
JP2019131978A (en) 2018-01-29 2019-08-08 鹿島建設株式会社 Bridge construction method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001131938A (en) 1999-11-01 2001-05-15 Taisei Corp Construction method for launching pier
JP2012162862A (en) 2011-02-03 2012-08-30 Kouchi Marutaka:Kk Scaffold for pier construction and pier construction method
JP2015113581A (en) 2013-12-09 2015-06-22 株式会社横山基礎工事 Construction method of structure and support device
JP2016199956A (en) 2015-04-14 2016-12-01 新日鉄住金エンジニアリング株式会社 Bridge construction method
JP2017190607A (en) 2016-04-13 2017-10-19 ヒロセ株式会社 Erection method of simple temporary bridge
JP2019131978A (en) 2018-01-29 2019-08-08 鹿島建設株式会社 Bridge construction method

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