JPH08326014A - Structure and method of reinforcing stud made of steel - Google Patents
Structure and method of reinforcing stud made of steelInfo
- Publication number
- JPH08326014A JPH08326014A JP15405795A JP15405795A JPH08326014A JP H08326014 A JPH08326014 A JP H08326014A JP 15405795 A JP15405795 A JP 15405795A JP 15405795 A JP15405795 A JP 15405795A JP H08326014 A JPH08326014 A JP H08326014A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- steel
- existing
- pedestal
- internal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、道路、鉄道、橋梁等
各種構造体の橋脚の桁や梁を支持する鋼製の中空既設脚
柱の内部空間部に、内部筒体を立設し、該内部筒体と既
設脚柱間の環状空間部に、モルタル、コンクリートモル
タル、又は鉄筋コンクリート（以下コンクリートとい
う）を充填して補強する鋼製脚柱の補強構造及び補強方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides an internal cylinder standing in an internal space of a steel hollow existing pedestal for supporting girders and beams of various structures such as roads, railways and bridges. The present invention relates to a reinforcing structure and a reinforcing method for a steel pedestal in which an annular space portion between the internal cylinder and an existing pedestal is filled with mortar, concrete mortar, or reinforced concrete (hereinafter referred to as concrete) to reinforce.
【０００２】[0002]
【従来の技術】道路、鉄道、橋梁等各種構造体の橋脚の
桁や梁を支持する鋼製の中空既設脚柱は、内部に空間の
ある横断面円形や矩形の構造でＴ字形や門形等の形状に
形成されている。これらの鋼製の既設脚柱は、地震等に
よって予想以上の圧縮荷重や曲げ応力が集中した場合
に、桁又は梁を支える橋脚の横梁部やその下部の脚柱に
ワレ等が発生し損傷したり、塑性変形し座屈や破壊等が
生じる心配があった。2. Description of the Related Art Hollow steel existing pedestals for supporting girders and beams of various structures such as roads, railways and bridges are T-shaped or gate-shaped with a cross-section circular or rectangular structure with a space inside. And the like. These existing steel columns are damaged by damage such as cracks in the lateral beam part of the bridge pier supporting the girder or the beam and the pedestal below it when the compressive load and bending stress are concentrated more than expected due to an earthquake. Or, there is a concern that it may be plastically deformed to cause buckling or breakage.
【０００３】そこで、鋼製の中空既設脚柱の補強方法と
して、既設脚柱内部の空間部にコンクリートを充填し断
面性能を高めて損傷や座屈等が生じないように補強する
ことが考えられている。Therefore, as a method of reinforcing an existing steel pedestal, it is conceivable to fill the space inside the existing pedestal with concrete so as to enhance the cross-sectional performance so as to prevent damage and buckling. ing.
【０００４】図７（ａ），（ｂ）に鋼製橋脚の中空既設
脚柱にコンクリート１０７を充填して補強する従来例を
示し説明する。（ａ）は横断面円形の脚柱の場合、
（ｂ）は横断面矩形の脚柱の場合の一部を欠除した斜視
説明図である。橋脚１０１は、上部の道路や鉄道や橋等
の桁や梁を鋼製の横梁部１０５上で支持する鋼製の脚柱
１０２と、該脚柱１０２を支えるコンクリート製のフー
チング１０３と、該フーチング１０３を地中に固定する
杭１０４よりなる基礎１０８とから形成されている。こ
の脚柱１０２は、横断面円形又は横断面矩形の内部が中
空の筒体で図のようなＴ字形、又は図示省略した門形等
の形状に形成されている。図は、この横断面円形又は横
断面矩形の脚柱１０２内部の空間部１０６全体にコンク
リート１０７を充填し補強している。7A and 7B, a conventional example in which a hollow existing pedestal of a steel bridge pier is filled with concrete 107 for reinforcement will be described. (A) is a column with a circular cross section,
(B) is a perspective explanatory view in which a part of a pillar having a rectangular cross section is cut away. The pier 101 includes a steel pedestal 102 that supports girders and beams of roads, railways, bridges, and the like on a steel cross beam portion 105, a concrete footing 103 that supports the pedestal 102, and the footing. It is formed of a foundation 108 composed of piles 104 for fixing 103 to the ground. The pedestal 102 is a tubular body having a hollow cross section or a rectangular cross section with a hollow inside, and is formed into a T shape as shown in the figure, or a gate shape not shown in the figure. In the figure, concrete 107 is filled and reinforced in the entire space 106 inside the pillar 102 having a circular cross section or a rectangular cross section.
【０００５】[0005]
【発明が解決しようとする課題】内部が中空の鋼製の既
設脚柱１０２の空間部１０６の全体にコンクリート１０
７を充填する方法は、コンクリート１０７が大量に必要
になり、かつコンクリート１０７の荷重が大きくなるた
め、図の一点鎖線に示すように基礎１０８のフーチング
１０３Ａを拡幅したり、杭１０４Ａの本数を増やす必要
が生じた。また、充填する大量かつ大荷重のコンクリー
ト１０７を打設する際に外側に広がる力、及びコンクリ
ートが凝固する際の発熱により膨張する力を支えるため
に、必要に応じて脚柱１０２本体まで外側から補強する
必要が生じた。そのため鋼製既設脚柱１０２は必要以上
の過大な補強構造、かつ大規模な工事となって経済性の
問題も生じた。The entire space 106 of the existing steel pedestal 102 having a hollow interior is made of concrete 10.
The method of filling 7 requires a large amount of concrete 107 and a large load on the concrete 107, so that the footing 103A of the foundation 108 is widened or the number of piles 104A is increased as shown by the alternate long and short dash line in the figure. The need arises. Also, in order to support the force that spreads outward when placing a large amount of heavy concrete 107 to be filled and the force that expands due to the heat generated when the concrete solidifies, from the outside to the pedestal 102 main body as necessary. It became necessary to reinforce. Therefore, the existing steel pedestal 102 has an excessively large reinforced structure more than necessary and is a large-scale construction, which causes a problem of economical efficiency.
【０００６】この発明はこれらの課題に鑑みてなされた
もので、鋼製の中空既設脚柱の内部空間部に鋼製の内部
筒体を作業性良く効率良く構築し二重壁構造に形成し、
該既設脚柱と内部筒体間の環状空間部にコンクリートを
充填し、このコンクリート充填量は必要な耐震性能が得
られる必要最少量とし、鋼製の既設脚柱と内部筒体とコ
ンクリートとを一体化複合させた鋼製脚柱の補強構造及
び補強方法を提供するものである。The present invention has been made in view of these problems, and an internal cylinder made of steel is constructed in a double wall structure by efficiently constructing an internal cylinder made of steel in the internal space of a hollow existing pedestal made of steel. ,
Concrete is filled in the annular space between the existing pedestal and the inner cylinder, and the concrete filling amount is set to the minimum required to obtain the required seismic performance. The present invention provides a reinforcing structure and a reinforcing method for a steel pedestal that is integrally combined.
【０００７】[0007]
【課題を解決するための手段】この発明の鋼製脚柱の補
強構造は、鋼製の中空既設脚柱の内部空間部に、下端部
を基礎上に固定しかつ上端部を既設脚柱上部の横梁部に
固定した鋼製の内部筒体を立設し、該内部筒体と上記既
設脚柱との間の環状空間部にコンクリートを充填して形
成したものである。According to the reinforcing structure for a steel pedestal of the present invention, a lower end is fixed on a foundation and an upper end is an upper part of an existing pedestal in an internal space of a hollow steel existing pedestal. The steel inner cylindrical body fixed to the cross beam portion is erected, and the annular space between the inner cylindrical body and the existing pedestal is filled with concrete.
【０００８】また、この発明の鋼製脚柱の補強方法は、
鋼製の中空既設脚柱の下部側壁に開口部を設け、該開口
部から鋼製の挿入板を該既設脚柱の内部空間部に挿入
し、該挿入板を内部空間部の基礎上にて複数枚接合して
リング壁を形成し、該リング壁を既設脚柱に沿って垂直
に上昇させ、該リング壁の下部に挿入板を接合して下部
リング壁を形成し、順次上記上昇と接合を繰返しリング
壁を継ぎ足して上記既設脚柱の内部空間部に内部筒体を
立設し、上記開口部を閉塞した後上記内部筒体と上記既
設脚柱との間の環状空間部にコンクリートを充填するも
のである。Further, the method of reinforcing a steel pedestal of the present invention is
An opening is provided in the lower side wall of the existing hollow pedestal made of steel, and an insertion plate made of steel is inserted into the internal space of the existing pedestal through the opening, and the insertion plate is placed on the foundation of the internal space. A plurality of rings are joined to form a ring wall, the ring wall is vertically raised along an existing pedestal, and an insertion plate is joined to a lower portion of the ring wall to form a lower ring wall, which is sequentially joined to the rise. Repeatedly add a ring wall to erected an internal cylinder in the internal space of the existing pedestal, and after closing the opening, add concrete to the annular space between the internal cylinder and the existing pedestal. It is to be filled.
【０００９】また、この発明の鋼製脚柱の補強方法は、
鋼製の中空既設脚柱の下部側壁に開口部を設け、上記既
設脚柱の内部空間部の基礎上に上端ラセン状の底部リン
グを設置し、該底部リングの上端に走行ガイドを設け、
上記開口部から鋼製の挿入板を該既設脚柱の内部空間部
に挿入し、上記走行ガイド上に案内させた上記挿入板を
順次接合し回転させてラセン状の連続したリング壁を組
上げ内部筒体を立設し、上記開口部を閉塞した後上記内
部筒体と上記既設脚柱との間の環状空間部にコンクリー
トを充填するものである。Further, the method of reinforcing a steel pedestal of the present invention is
An opening is provided in the lower side wall of the existing hollow pedestal made of steel, a bottom ring of upper end spiral shape is installed on the foundation of the internal space of the existing pedestal, and a running guide is provided at the upper end of the bottom ring.
A steel insert plate is inserted into the internal space of the existing pedestal through the opening, and the insert plates guided on the running guide are sequentially joined and rotated to assemble a continuous spiral ring wall inside. After the cylinder is erected and the opening is closed, concrete is filled in the annular space between the internal cylinder and the existing pedestal.
【００１０】また、この発明の鋼製脚柱の補強方法は、
上記鋼製の内部筒体とその外側に位置する鋼製の中空既
設脚柱との間の環状空間部にコンクリートを充填するに
当たり、コンクリートが流出する複数の流出口を上下方
向にわたって所定間隔をおいて形成した導入管を上記内
部筒体の内側又は外側に立設し、該導入管の下部入口か
らコンクリートを圧入し、下部の流出口から上部の流出
口へと順次コンクリートを流出させ上記環状空間部にコ
ンクリートを充填するものである。Further, the method of reinforcing a steel pedestal of the present invention is
When filling the annular space between the steel inner cylindrical body and the existing hollow steel pedestal located on the outer side with concrete, a plurality of outlets through which the concrete flows out are arranged at predetermined intervals in the vertical direction. The inner pipe is formed upright inside or outside the inner cylindrical body, concrete is press-fitted from the lower inlet of the inner pipe, and concrete is sequentially discharged from the lower outlet to the upper outlet to form the annular space. The part is filled with concrete.
【００１１】また、この発明の鋼製脚柱の補強構造は、
上記鋼製の中空既設脚柱と、該既設脚柱の内部空間部に
立設した鋼製の内部筒体と、該内部筒体と既設脚柱との
間の環状空間部に充填したコンクリートと、上記内部筒
体の内側又は外側に配設した単数のラセン状管又は複数
の垂直管若しくは複数の段状管で構成されるコンクリー
ト充填導入管とからなるものである。Further, the reinforcing structure of the steel pedestal of the present invention is
A hollow existing stud made of steel, an internal cylinder made of steel erected in the internal space of the existing stanchion, and concrete filled in an annular space between the internal cylinder and the existing stanchion. A concrete-filled introduction pipe composed of a single spiral pipe or a plurality of vertical pipes or a plurality of step pipes arranged inside or outside the inner cylinder.
【００１２】[0012]
【作用】この発明の鋼製脚柱の補強構造は、鋼製の中空
既設脚柱の内部空間部に、下端部を基礎上に固定しかつ
上端部を既設脚柱上部の横梁部に固定した鋼製の内部筒
体を立設し、該内部筒体と上記既設脚柱との間の環状空
間部にコンクリートを充填して形成したので、鋼製の内
部筒体が粘りと柔軟性を増大させ、弾性変形能を大きく
し脚柱の強度を高める。また充填したコンクリートは、
断面性能を高め、圧縮強度を増大させる。またコンクリ
ートは、コンクリート型枠を別途作らなくても内部筒体
と既設脚柱を型枠にして打設でき型枠作業が不要とな
り、また圧縮荷重がかかってもヒビ割れが入ったり内部
及び外部にはじける損傷がない。また既設脚柱に変形や
割れ、溶接部等の接続部に破損を生じることがない。こ
のように、中空で軽量な二重壁の鋼材とその間に充填し
た少量のコンクリートとが一体化した強い複合構造の補
強脚柱が得られる。また、既設の基礎を充填コンクリー
トの荷重に耐えるために補強する必要がない。また、既
設脚柱本体もコンクリートの打設する際の力に耐えるよ
うに補強する必要がない。In the reinforcing structure of the steel pedestal of the present invention, the lower end portion is fixed to the foundation and the upper end portion is fixed to the horizontal beam portion above the existing pedestal in the internal space portion of the hollow existing pedestal made of steel. Since the inner cylinder made of steel is erected and the annular space between the inner cylinder and the existing pedestal is filled with concrete, the inner cylinder made of steel has increased stickiness and flexibility. The elastic deformability is increased to increase the strength of the pedestal. Also, the filled concrete is
Improves cross-sectional performance and increases compressive strength. In addition, concrete can be placed by using the inner cylinder and the existing pedestal as the formwork without making a concrete formwork separately, which eliminates the need for the formwork work. Also, even if a compressive load is applied, the concrete may crack or internal or external There is no damage bursting. In addition, the existing pedestal will not be deformed or cracked, and the welded portion or the like will not be damaged. In this way, a strong composite reinforced column in which a hollow and lightweight double-walled steel material and a small amount of concrete filled between them are integrated can be obtained. Also, existing foundations do not need to be reinforced to withstand the load of filled concrete. Also, it is not necessary to reinforce the existing pedestal body so as to withstand the force of concrete pouring.
【００１３】また、この発明の鋼製脚柱の補強方法は、
鋼製の中空既設脚柱の下部側壁に開口部を設け、該開口
部から鋼製の挿入板を該既設脚柱の内部空間部に挿入
し、該挿入板を内部空間部の基礎上にて複数枚接合して
リング壁を形成し、該リング壁を既設脚柱に沿って垂直
に上昇させ、該リング壁の下部に挿入板を接合して下部
リング壁を形成し、順次上記上昇と接合を繰返しリング
壁を継ぎ足して上記既設脚柱の内部空間部に内部筒体を
立設し、上記開口部を閉塞した後上記内部筒体と上記既
設脚柱との間の環状空間部にコンクリートを充填するの
で、空間部の地上の出入口付近及び内部空間部の内側か
らリング壁の接合作業ができ、狭く密閉された環状空間
部内での作業や高所の危険な作業がなく、低所で安全に
効率良く作業ができる。また、高さ方向に順次上昇させ
延長するので、高い脚柱でも任意に連続して構築でき
る。また、コンクリートは狭い環状空間部に後から必要
量を、打ち継ぎ部なしに一度に効率良く充填できる。The method of reinforcing a steel pedestal of the present invention is
An opening is provided in the lower side wall of the existing hollow pedestal made of steel, and an insertion plate made of steel is inserted into the internal space of the existing pedestal through the opening, and the insertion plate is placed on the foundation of the internal space. A plurality of rings are joined to form a ring wall, the ring wall is vertically raised along an existing pedestal, and an insertion plate is joined to a lower portion of the ring wall to form a lower ring wall, which is sequentially joined to the rise. Repeatedly add a ring wall to erected an internal cylinder in the internal space of the existing pedestal, and after closing the opening, add concrete to the annular space between the internal cylinder and the existing pedestal. Since it is filled, the ring wall can be joined from near the above-ground entrance and exit of the space and from the inside of the internal space, and there is no work inside the narrowly sealed annular space or dangerous work at high places, and it is safe at low places. You can work efficiently. In addition, since it is sequentially raised and extended in the height direction, it is possible to continuously construct even a high pedestal. Further, the concrete can be efficiently filled into the narrow annular space portion later with a necessary amount at a time without using the splicing portion.
【００１４】また、この発明の鋼製脚柱の補強方法は、
鋼製の中空既設脚柱の下部側壁に開口部を設け、上記既
設脚柱の内部空間部の基礎上に上端ラセン状の底部リン
グを設置し、該底部リングの上端に走行ガイドを設け、
上記開口部から鋼製の挿入板を該既設脚柱の内部空間部
に挿入し、上記走行ガイド上に案内された上記挿入板を
順次一枚ずつ接合し、回転させてラセン状の連続したリ
ング壁を組上げ内部筒体を立設するので、挿入板は走行
ガイド上を案内されて円滑に挿入部まで移動し、該挿入
板を接合してリング壁に組立てる作業は、開口部付近の
挿入部の一定箇所で安全に効率良くできる。従って、狭
い密閉空間内部を人が機器を移動して組立て接合する必
要がなく作業効率が良い。また、リング壁をラセン状に
回転させて連続して押上げるので、荷重を垂直に支えて
持ち上げたり吊り上げる作業を必要とせず、大きくて高
い内部筒体でも安全に効率良く構築できる。また、上記
開口部を閉塞した後上記内部筒体と上記既設脚柱との間
の環状空間部にコンクリートを充填するので、コンクリ
ートは環状空間部に後から必要量を、打ち継ぎ部なしに
一度に効率良く充填できる。The method of reinforcing a steel pedestal of the present invention is
An opening is provided in the lower side wall of the existing hollow pedestal made of steel, a bottom ring of upper end spiral shape is installed on the foundation of the internal space of the existing pedestal, and a running guide is provided at the upper end of the bottom ring.
A steel insert plate is inserted into the internal space of the existing pedestal through the opening, and the insert plates guided on the running guide are sequentially joined one by one and rotated to rotate the spiral continuous ring. Since the wall is assembled and the internal cylinder is erected, the insertion plate is guided along the traveling guide and smoothly moves to the insertion portion.The work of joining the insertion plate and assembling it to the ring wall is performed by inserting the insertion portion near the opening. It can be done safely and efficiently at certain places. Therefore, it is not necessary for a person to move the device inside the narrow closed space to assemble and join the device, and work efficiency is good. Further, since the ring wall is rotated in a spiral shape and continuously pushed up, it is not necessary to vertically support and lift the load, and it is possible to safely and efficiently construct a large and tall internal cylinder. Further, after closing the opening, concrete is filled in the annular space between the internal cylinder and the existing pedestal, so that the concrete needs to have a necessary amount in the annular space afterwards, once without the splice part. Can be filled efficiently.
【００１５】また、この発明の鋼製脚柱の補強方法は、
上記鋼製の内部筒体とその外側に位置する鋼製の中空既
設脚柱との間の環状空間部にコンクリートを充填するに
当たり、コンクリートが流出する複数の流出口を上下方
向にわたって所定間隔をおいて形成した導入管を上記内
部筒体の内側又は外側に立設し、該導入管の下部入口か
らコンクリートを圧入し、下部の流出口から上部の流出
口へと順次コンクリートを流出させ上記環状空間部にコ
ンクリートを充填するので、コンクリートを狭い環状空
間部に下から順次均一に広がり効率良く充填できる。ま
た、コンクリートを高所まで運び上げる必要がなく、そ
の結果、コンクリートが高所から落下することにより分
離しばらけ、変質して強度の低下が生じるといったこと
からも解放される。また、導入管を内部筒体の内側に立
設した場合には、内部筒体にもコンクリートの流出口を
開口する必要があるが、内部空間部の内側の広い作業空
間での取付作業であるためその作業は容易である他、内
部筒体の補強部材として作用する。また、導入管を内部
筒体の外側に立設した場合には、環状空間部にコンクリ
ートを直接流出させることができ、導入管はコンクリー
ト内に補強材として埋設する。The method of reinforcing a steel pedestal of the present invention is
When filling the annular space between the steel inner cylindrical body and the existing hollow steel pedestal located on the outer side with concrete, a plurality of outlets through which the concrete flows out are arranged at predetermined intervals in the vertical direction. The inner pipe is formed upright inside or outside the inner cylindrical body, concrete is press-fitted from the lower inlet of the inner pipe, and concrete is sequentially discharged from the lower outlet to the upper outlet to form the annular space. Since the parts are filled with concrete, it is possible to spread the concrete uniformly in the narrow annular space from the bottom in order and efficiently. Further, it is not necessary to carry the concrete up to a high place, and as a result, the concrete is separated from the high place by being dropped and deteriorated to deteriorate the strength. Further, when the introduction pipe is erected inside the inner cylinder, it is necessary to open the concrete outlet in the inner cylinder, but this is a mounting work in a large work space inside the inner space part. Therefore, the work is easy, and it works as a reinforcing member for the internal cylinder. Further, when the introduction pipe is erected on the outside of the inner cylindrical body, the concrete can flow out directly into the annular space portion, and the introduction pipe is embedded in the concrete as a reinforcing material.
【００１６】また、この発明の鋼製脚柱の補強構造は、
上記鋼製の中空既設脚柱と、該既設脚柱の内部空間部に
立設した鋼製の内部筒体と、該内部筒体と既設脚柱との
間の環状空間部に充填したコンクリートと、上記内部筒
体の内側又は外側に配設した単数のラセン状管又は複数
の垂直管若しくは複数の段状管で構成されるコンクリー
ト充填導入管とからなるので、該導入管を内部筒体の内
側に設けた場合には導入管は内部筒体を内側から支える
補強材、及びコンクリートの打設荷重を支える補強材と
なり、上記導入管を内部筒体の外側に設けた場合には導
入管はコンクリートに埋設される補強材となり、いずれ
の場合も各部材が一体化した複合構造の一層強い補強脚
柱となる。単数のラセン状管は、内部筒体の外側に設け
ることによって、フープ力を与え脚柱の周方向の曲げ強
度を高める。複数の垂直管は、内部筒体の内側又は外側
に等間隔に立設することによって、脚柱の曲げ強度を高
める。複数の段状管を内部筒体の外側に設けた場合は、
脚柱の周方向の強度を高める。Further, the reinforcing structure of the steel pedestal of the present invention is
A hollow existing stud made of steel, an internal cylinder made of steel erected in the internal space of the existing stanchion, and concrete filled in an annular space between the internal cylinder and the existing stanchion. , A concrete-filled introduction pipe composed of a single spiral pipe or a plurality of vertical pipes or a plurality of step pipes arranged inside or outside the internal cylinder, so that the introduction pipe of the internal cylinder is When installed on the inside, the introduction pipe serves as a reinforcing material that supports the inner cylinder from the inside, and a reinforcement that supports the placing load of concrete.When the above introduction pipe is installed on the outside of the inner cylinder, the introduction pipe does not It becomes a reinforcing material embedded in concrete, and in each case, it becomes a stronger reinforcing pillar with a composite structure in which each member is integrated. The single spiral tube is provided on the outside of the inner cylindrical body to give a hoop force and enhance the bending strength of the pedestal in the circumferential direction. The plurality of vertical pipes are provided upright inside or outside the inner cylinder at equal intervals to enhance the bending strength of the pedestal. When multiple stepped tubes are provided outside the inner cylinder,
Increase the strength of the pedestal in the circumferential direction.
【００１７】[0017]
【実施例】図面に基づいて、実施例を説明する。図１
に、この発明に係る鋼製の中空既設脚柱の補強構造を示
す。（ａ）は横断面円形筒状の脚柱、（ｂ）は横断面矩
形筒状の脚柱の事例である。道路、鉄道、橋梁等の橋脚
１は、上部を通る道路や鉄道等の桁や梁を直接又は支承
材を介して支える横梁部５と、該横梁部５下部に続く断
面円形又は断面矩形の鋼製の中空脚柱２と、該脚柱２に
かかる荷重を支えるコンクリート構造のフーチング３及
び地中の杭４よりなる基礎８とから形成される。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described with reference to the drawings. FIG.
Fig. 1 shows a reinforcing structure of a steel hollow existing pedestal according to the present invention. (A) is a column having a circular tubular cross section, and (b) is an example of a column having a rectangular tubular cross section. A bridge pier 1 such as a road, a railroad, or a bridge is composed of a cross beam part 5 that supports a girder or a beam of a road or a rail line that passes therethrough directly or through a support material, and a steel section having a circular cross section or a rectangular cross section that follows the lower part of the cross beam part 5. It is formed from a hollow pedestal 2 made of steel, and a foundation 8 composed of a footing 3 having a concrete structure for supporting a load applied to the pedestal 2 and a pile 4 in the ground.
【００１８】上記鋼製の中空既設脚柱２の補強は、図１
及び図２に示すように既設脚柱２の内部空間部６に鋼製
の内部筒体９を立設する。該内部筒体９は、下端部を地
上の基礎８のフーチング３にベース板とアンカー等を用
いて頑強に固定し、かつ上端部を既設脚柱２上部の横梁
部５の頂部支承端１０に固定する。次に、この内部筒体
９とその外側に位置する既設脚柱２との二重壁間の環状
空間部１２にコンクリート７を充填し補強する。このコ
ンクリート７は不連続部や打ち継ぎ部が生じないよう
に、連続して均一に充填する。The reinforcement of the existing steel hollow pedestal 2 is shown in FIG.
As shown in FIG. 2, a steel internal cylinder 9 is erected in the internal space 6 of the existing pedestal 2. The inner cylinder 9 has its lower end firmly fixed to the footing 3 of the ground foundation 8 by using a base plate and anchors, and the upper end to the top bearing end 10 of the cross beam 5 above the existing pedestal 2. Fix it. Next, concrete 7 is filled and reinforced in the annular space 12 between the double walls of the inner tubular body 9 and the existing stanchions 2 located outside thereof. The concrete 7 is continuously and evenly filled so that no discontinuous portion or joint is formed.
【００１９】上記の複合補強構造にすることにより、鋼
製の内部筒体９が粘りと柔軟性を増大させ弾性変形能を
大きくし、また充填したコンクリート７が断面性能を高
め圧縮強度を増大させる。またコンクリート７は、コン
クリート打設用型枠を別途作らなくても内部筒体９と既
設脚柱２を型枠にして打設充填でき、型枠費用が削減で
き、かつコンクリート７は両側面を鋼製の壁９，２に挟
まれ押えられているため、コンクリート７に圧縮荷重や
曲げ荷重がかかってもヒビ割れが入ったり外部にはじけ
飛散する等の損傷がない。また上記コンクリート７が圧
縮荷重を支えるので、鋼製の脚柱２が座屈する心配がな
く、また鋼材に変形や割れ、溶接部等の接続部に破損が
生じることがない。このように、軽量な鋼材と必要最少
量のコンクリート７を使用し一体化した中空二重壁状の
強い複合構造の補強脚柱が得られる。By using the above-mentioned composite reinforcing structure, the steel inner cylindrical body 9 increases tenacity and flexibility to increase elastic deformability, and the filled concrete 7 increases cross sectional performance and compressive strength. . Further, the concrete 7 can be placed and filled by using the internal cylinder 9 and the existing pedestal 2 as a form without separately making a concrete placing form, and the form cost can be reduced, and the concrete 7 has both side surfaces. Since the concrete 7 is sandwiched and pressed by the walls 9 and 2, there is no damage such as cracking or splashing to the outside even if a compressive load or a bending load is applied to the concrete 7. Further, since the concrete 7 bears the compressive load, there is no concern that the steel pedestal 2 will buckle, and the steel material will not be deformed or cracked, and the welded portion or the like will not be damaged. In this manner, a hollow double-walled strong reinforced pillar having a hollow double-walled structure, which is integrated by using a lightweight steel material and a minimum amount of concrete 7, can be obtained.
【００２０】また、上記内部筒体９内側の大きい空間に
はコンクリート７を充填することなく、狭い環状空間部
１２にコンクリート７を充填するので、コンクリート７
の量は少なく荷重も少ないので、フーチング３と杭４よ
りなる基礎８を拡幅するなど必要以上の大掛かりな補強
は要らない。例えば、既設脚柱２の大きさが外径２ｍ高
さ１０ｍの円筒の事例では、内部筒体９は外径１．５ｍ
程度に形成し、この場合コンクリート７を充填する環状
空間部１２は、間隔が０．２５ｍ高さが１０ｍの縦に細
長い密閉された環状の空間となる。この場合のコンクリ
ート７の充填量は、全体に充填する場合に比較して体積
及び重量が約４割程度に軽減される。Further, since the large space inside the inner tubular body 9 is not filled with the concrete 7 but the narrow annular space 12 is filled with the concrete 7, the concrete 7
Since the amount of load is small and the load is small, it is not necessary to reinforce the foundation 8 consisting of the footing 3 and the piles 4, such as widening more than necessary. For example, in the case where the size of the existing pedestal 2 is a cylinder having an outer diameter of 2 m and a height of 10 m, the inner cylindrical body 9 has an outer diameter of 1.5 m.
The annular space portion 12 which is formed to a degree and in this case is filled with concrete 7 is a vertically elongated and enclosed annular space having a space of 0.25 m and a height of 10 m. In this case, the filling amount of the concrete 7 is reduced to about 40% in volume and weight as compared with the case of filling the whole.
【００２１】図２に、上記実施例の橋脚上部の横梁部５
の近傍を拡大して示す。鋼製の内部筒体９の上端部は、
既設脚柱２上部の横梁部５の上端部の横梁部上端５Ａま
で延長し、該横梁部上端５Ａに頂部開口１１を設け頂部
支承端１０に固定した場合を示す。この頂部開口１１は
補強作業時に使用し、補強作業の終了時には覆い板等で
閉塞する。なお、横梁部上端５Ａが上部の桁や梁と一体
化されている場合には、横梁部５の側面等に開口を設
け、この開口を使用して上記補強作業を行う。FIG. 2 shows a cross beam portion 5 above the pier of the above embodiment.
The vicinity of is shown enlarged. The upper end of the steel inner cylinder 9 is
A case is shown in which the upper end of the horizontal beam portion 5 above the existing pedestal 2 is extended to the horizontal beam portion upper end 5A, and a top opening 11 is provided in the horizontal beam portion upper end 5A and fixed to the top bearing end 10. The top opening 11 is used during the reinforcing work, and is closed with a cover plate or the like at the end of the reinforcing work. When the upper end 5A of the horizontal beam portion is integrated with the upper girder or the beam, an opening is provided in the side surface of the horizontal beam portion 5 and the reinforcement work is performed using this opening.
【００２２】なお、コンクリート７の環状空間部１２へ
の充填高さは既設脚柱２の途中の所定位置までの充填高
さとするか、又は図のように横梁部下端５Ｂまでの高さ
とするか、若しくは横梁部上端５Ａまで至る全体充填と
する。脚柱の途中や所定高さまでの部分充填の場合は、
上部が軽量で安定性が良く所定位置まで効率の良い補強
構造になる。また、横梁部下端又は上端までの全体充填
の場合は、横梁部５まで一体化させた全体の補強構造に
なる。Incidentally, whether the filling height of the concrete 7 into the annular space portion 12 is the filling height up to a predetermined position in the middle of the existing pedestal 2, or the height up to the lower end 5B of the horizontal beam portion as shown in the figure. Alternatively, the entire filling up to the upper end 5A of the lateral beam portion is performed. In the case of partial filling up to the specified height in the middle of the pedestal,
The upper part is lightweight and has good stability, and it is a reinforced structure that is efficient up to a predetermined position. Further, in the case of the entire filling up to the lower end or the upper end of the lateral beam portion, the entire reinforcing structure including the lateral beam portion 5 is integrated.
【００２３】図３はこの発明に係る内部筒体９を構築す
る方法の実施例で、ジャッキアップによって地上にて組
立てる場合を示す。既設脚柱２の下部側壁に開口部１４
を設け、該既設脚柱２の内部空間部６の基礎８のフーチ
ング３上に所定間隔を置いて複数のジャッキ１７を配設
する。上記開口部１４から搬入した挿入板１５を、内部
空間部６の内側から上記ジャッキ１７で支えながら接合
しリング壁１３を組立て、次に該ジャッキ１７を使用し
１段上にジャッキアップする。このジャッキアップした
下部でさらに次の下段のリング壁１３を組立て上段のリ
ング壁１３に下段のリング壁１３を継ぎ足し、順次上記
ジャッキアップと組立てを繰り返して内部筒体９を構築
する。内部筒体９の構築後は、使用したジャッキ１７は
開口部１４から撤去し、開口部１４は閉塞する。FIG. 3 shows an embodiment of a method for constructing the internal cylinder 9 according to the present invention, and shows a case of assembling on the ground by jacking up. The opening 14 is formed in the lower side wall of the existing pedestal 2.
And a plurality of jacks 17 are arranged at predetermined intervals on the footing 3 of the foundation 8 of the internal space 6 of the existing pedestal 2. The insertion plate 15 carried in through the opening 14 is joined from the inside of the internal space 6 while being supported by the jack 17 to assemble the ring wall 13, and then the jack 17 is used to jack up one step. The lower ring wall 13 of the next stage is assembled at this jacked-up lower part, the lower ring wall 13 is added to the upper ring wall 13, and the above-mentioned jacking up and assembling are sequentially repeated to construct the inner cylindrical body 9. After the construction of the inner cylinder 9, the used jack 17 is removed from the opening 14 and the opening 14 is closed.
【００２４】挿入板１５は、図示した横断面円形のリン
グ壁１３の場合には弧状の板の端面１６を溶接接合す
る。また、横断面矩形のリング壁１３の場合には平板の
端面１６を溶接接合する。なお、挿入板１５の端面１６
に鍔部を設けボルトとナットで接合する構造にしても良
い。最上部のリング壁１３の上端部には必要に応じて、
頂部支承端１０となる補強用の補強リング１９を設け、
またリング壁１３を既設脚柱２に沿って垂直に上昇させ
るための複数個の隔接したガイド１８を設ける。また強
度不足の場合には、リング壁１３の内部に補強用の梁材
を設けたり、リング壁１３の外側にコンクリート７に埋
設する鉄筋等の補強材を設ける。In the case of the ring wall 13 having a circular cross section as shown, the insert plate 15 is welded to the end face 16 of the arc-shaped plate. Further, in the case of the ring wall 13 having a rectangular cross section, the end face 16 of the flat plate is welded and joined. The end surface 16 of the insertion plate 15
Alternatively, a collar portion may be provided on the base and the structure may be joined with a bolt and a nut. At the upper end of the uppermost ring wall 13, if necessary,
Providing a reinforcing ring 19 for reinforcement to be the top bearing end 10,
Further, a plurality of spaced guides 18 are provided for vertically raising the ring wall 13 along the existing pedestal 2. When the strength is insufficient, a reinforcing beam member is provided inside the ring wall 13 or a reinforcing member such as a reinforcing bar embedded in the concrete 7 is provided outside the ring wall 13.
【００２５】上記ジャッキアップによる内部筒体９の構
築方法は、狭く密閉された環状空間部１２内での作業性
の悪い危険な作業がない。また、基礎上の開口部１４の
出入口付近、及び内部筒体９の内側の比較的広い空間部
で組立て作業ができるので、低所の広い作業空間で安全
に効率良く作業ができる。また、高さ方向にジャッキ１
７を用いて順次リング壁１３を継ぎ足し延長するので、
高い内部筒体９でも低所で安全に効率良く構築できる。In the method of constructing the inner cylinder 9 by jacking up, there is no dangerous work with poor workability in the narrowly sealed annular space 12. Further, since the assembling work can be performed in the vicinity of the entrance / exit of the opening 14 on the foundation and in the relatively wide space inside the inner cylindrical body 9, the work can be performed safely and efficiently in a wide working space at a low place. Also, jack 1 in the height direction.
Since the ring wall 13 is added and extended sequentially by using 7,
Even a high internal cylinder 9 can be safely and efficiently constructed at a low place.
【００２６】図４は、内部筒体を構築する他の実施例
で、（ａ）は地上付近から吊り上げ組立てる場合を示
し、（ｂ）は上部から吊り上げ組立てる場合を示す。FIGS. 4A and 4B show another embodiment for constructing an internal cylinder, in which FIG. 4A shows a case of hoisting and assembling from near the ground, and FIG. 4B shows a case of hoisting and assembling from the upper part.
【００２７】（ａ）は、既設脚柱２の内壁の所定高さ位
置に、隔接して周方向に複数の吊り支点２１を設け、こ
の吊り支点２１に吊り具２２を係合する。挿入板１５Ａ
には吊りピース２３を設け、該挿入板１５Ａを開口部１
４から挿入し、基礎８上で接合してリング壁１３Ａを組
立てた後、上記吊り具２２を吊りピース２３に係合し、
該吊り具２２によって平均に吊り上げ、順次下部のリン
グ壁１３Ａを組立て継ぎ足し、垂直に上昇させて内部筒
体９を構築する。なお必要に応じて、上端部のリング壁
１３Ａに、内部筒体９を既設脚柱２に沿って垂直に上昇
させるために複数個の隔接したガイド１８Ａを設ける。In the case of (a), a plurality of suspension fulcrums 21 are provided in a circumferential direction at a predetermined height position on the inner wall of the existing pedestal 2, and the suspension 22 is engaged with the suspension fulcrums 21. Insert plate 15A
A hanging piece 23 is provided in the
4, the ring wall 13A is assembled by joining on the foundation 8 and then the hanging tool 22 is engaged with the hanging piece 23,
The hoisting tool 22 lifts the ring evenly, and the lower ring wall 13A is sequentially assembled and added to the hoisting tool 22, and the hoisting tool 22 is vertically lifted to construct the inner cylindrical body 9. If necessary, the ring wall 13A at the upper end portion is provided with a plurality of spaced guides 18A for vertically raising the inner cylindrical body 9 along the existing pedestal 2.
【００２８】（ｂ）は、既設脚柱２の横梁部上端５Ａの
上部に吊り支点２４を設け、この吊り支点２４にウイン
チ等の吊り装置２５を設置し、基礎８上で挿入板１５Ｂ
を接合しリング壁１３Ｂを組立て、該リング壁１３Ｂの
上端に設けた吊り端部２７に上記吊りワイヤ２６を掛
け、上記吊り装置２５で吊り上げ順次下部のリング壁１
３Ｂを継ぎ足して内部筒体９を構築する。なお上端部の
リング壁１３Ｂに、前述と同様に必要に応じて複数のガ
イド１８Ｂを設ける。In (b), a suspension fulcrum 24 is provided on the upper end 5A of the transverse beam of the existing pedestal 2, and a suspension device 25 such as a winch is installed at the suspension fulcrum 24, and the insertion plate 15B is installed on the foundation 8.
Are joined together to assemble the ring wall 13B, the hanging wire 26 is hung on the hanging end portion 27 provided at the upper end of the ring wall 13B, and the hanging device 25 hoists the lower ring wall 1 in order.
3B is added to construct the inner cylinder 9. It should be noted that a plurality of guides 18B are provided on the ring wall 13B at the upper end as required, as described above.
【００２９】（ａ）のように地上付近から吊り上げる場
合は、基礎８上の手の届く範囲の低所で安全に吊り作業
と接合組立作業が同時にできる。また（ｂ）のように上
部から吊り上げる場合は、吊り上げ幅を大きくでき又垂
直に吊り上げる作業が連続して簡単容易にできる。When hoisting from near the ground as shown in (a), the hoisting work and the joining and assembling work can be simultaneously performed safely at a low place on the foundation 8 within the reach of the hand. Further, in the case of lifting from the upper portion as in (b), the lifting width can be increased, and the vertical lifting operation can be continuously and easily performed.
【００３０】図５は、内部筒体を構築する他の実施例
で、円形の内部筒体９をラセン状に組上げる場合を示
す。円形の内部筒体９を基礎８上で挿入板３０の送り込
みと回転によってラセン状の連続したリング壁３１に組
上げて構築する。挿入板３０は傾斜した湾曲平行四辺形
に形成し、該挿入板３０を、上記リング壁３１の挿入部
３６の傾斜に合わせた勾配に開口部１４の近傍に設置し
た複数のローラー架台３８上を滑らせて搬入する。挿入
板３０の接合部３７を溶接し押上げ、順次連続してラセ
ン状のリング壁３１を組上げ構築していく。FIG. 5 shows another embodiment for constructing the inner cylindrical body, in which the circular inner cylindrical body 9 is assembled in a spiral shape. The circular inner cylinder 9 is assembled on the foundation 8 by feeding and rotating the insertion plate 30 into a spiral continuous ring wall 31. The insertion plate 30 is formed in an inclined curved parallelogram, and the insertion plate 30 is mounted on a plurality of roller mounts 38 installed in the vicinity of the opening 14 at a slope matching the inclination of the insertion part 36 of the ring wall 31. Slide in and carry in. The joint portion 37 of the insertion plate 30 is welded and pushed up, and the spiral ring wall 31 is assembled successively and successively.
【００３１】上記リング壁３１をラセン状に組上げる方
法は、既設脚柱２内部の基礎８上にラセン状の底部リン
グ３２を設置し、該底部リング３２上に走行ガイド３３
を設け、該走行ガイド３３上に案内して挿入板３０を挿
入部３６に挿入しその端縁を接合した後、上記挿入板３
０端部のフック４０に係合回転機構３４を係合し、モー
ター３５を用いて上記走行ガイド３３上を回転させなが
ら引き上げて、順次上記操作を繰り返してラセン状の連
続したリング壁３１を形成する。上記走行ガイド３３
は、例えば回転により摩擦抵抗を軽減させる回転体、又
は滑り摩擦の低い溝等で形成する。また上記係合回転機
構３４は、例えばワイヤ又はチェーン等を使用する。な
お、最上部の頂部リング２０は上端部を水平に形成し、
この上端部には必要に応じて補強リング１９を設け、こ
の補強リング１９の外周に、リング壁３１を既設脚柱２
に沿ってラセン状に回転させながら垂直に上昇させるた
めの複数個の隔接したガイドローラー３９を設ける。In the method of assembling the ring wall 31 in a spiral shape, a spiral bottom ring 32 is installed on the foundation 8 inside the existing pedestal 2 and the running guide 33 is mounted on the bottom ring 32.
Is provided, the insertion plate 30 is guided to the running guide 33, the insertion plate 30 is inserted into the insertion portion 36, and the edges thereof are joined.
The engaging rotation mechanism 34 is engaged with the hook 40 at the 0 end, the motor 35 is used to pull up while rotating on the traveling guide 33, and the above operation is sequentially repeated to form a spiral continuous ring wall 31. To do. The running guide 33
Is formed of, for example, a rotating body that reduces frictional resistance by rotation, or a groove having low sliding friction. The engagement rotation mechanism 34 uses, for example, a wire or a chain. In addition, the uppermost top ring 20 has the upper end formed horizontally,
A reinforcing ring 19 is provided on the upper end portion as necessary, and a ring wall 31 is provided on the outer periphery of the reinforcing ring 19 to the existing pedestal 2.
A plurality of spaced guide rollers 39 are provided for vertically raising while rotating in a spiral shape.
【００３２】上記ラセン状に組上げる内部筒体９の構築
方法は、既設脚柱２の内部空間部６の基礎８上の開口部
１４の出入口付近の挿入部３６で、挿入板３０を接合し
てリング壁を組立てる作業ができるので、狭い密閉空間
の内部を人が周方向に回り、かつ機器を移動させてリン
グ壁を接合組立てる必要がなく、低所の一定箇所で人も
機器も移動することなく効率良く作業ができる。また、
リング壁を走行ガイドに案内しラセン状に回転させて連
続して押上げるので、荷重を垂直に支えて持ち上げたり
吊り上げる作業を必要とせず、大きくて高い内部筒体９
でも安全に効率良く構築できる。The method of constructing the internal cylindrical body 9 assembled in the spiral shape is as follows. The insertion plate 30 is joined at the insertion portion 36 near the entrance of the opening 14 on the foundation 8 of the internal space 6 of the existing pedestal 2. Since it is possible to assemble the ring wall with a person, it is not necessary for a person to go around the inside of a narrow enclosed space in the circumferential direction and to move the equipment to join and assemble the ring wall. You can work efficiently without Also,
Since the ring wall is guided by the running guide and rotated in a spiral shape and continuously pushed up, the work of vertically supporting and lifting or suspending the load is not required, and the large and high internal cylinder 9
But you can build it safely and efficiently.
【００３３】図６は、環状空間部１２にコンクリート７
を充填する実施例で、（ａ）は導入管４２を内部筒体９
の内側に立設した場合を示し、（ｂ）は導入管４２を内
部筒体９の外側に立設した場合を示す。FIG. 6 shows concrete 7 in the annular space 12.
(A) is an embodiment in which the introduction pipe 42 is inserted into the inner cylindrical body 9
2B shows the case in which it is erected inside, and FIG. 7B shows the case in which the introduction pipe 42 is erected outside the inner cylindrical body 9.
【００３４】鋼製の内部筒体９とその外側に位置する鋼
製の中空既設脚柱２との間の環状空間部１２にコンクリ
ート７を充填するに当たり、コンクリート７が流出する
複数の流出口４１を所定間隔をおいて上下方向にわたっ
て形成した導入管４２を、（ａ）は上記内部筒体９の内
側に立設し、（ｂ）は上記内部筒体９の外側に立設して
いる。該導入管４２は上記内部筒体９の組立て時に、順
次溶接又はボルト接合によって延長し立設する。なお、
図では上記導入管４２を複数の隔接した垂直管で形成し
た場合を示すが、単数のラセン状管、又は複数の段状管
で形成してもよい。上記導入管４２の下部入口からコン
クリート７を圧入し、下部の流出口４１から上部の流出
口４１へと順次コンクリート７を流出させ、上記環状空
間部１２に下方から上方に向かってコンクリート７を平
均に充填していく。When filling the annular space 12 between the steel inner cylindrical body 9 and the existing steel hollow pedestal 2 located on the outside thereof with concrete 7, a plurality of outlets 41 through which the concrete 7 flows out. The (a) is provided upright inside the inner tubular body 9, and the (b) is provided upright outside the inner tubular body 9. At the time of assembling the inner cylinder body 9, the introduction pipe 42 is sequentially extended by welding or bolt connection and erected. In addition,
Although the drawing shows the case where the introduction pipe 42 is formed by a plurality of vertical pipes that are spaced apart from each other, it may be formed by a single spiral pipe or a plurality of step pipes. Concrete 7 is press-fitted from the lower inlet of the introduction pipe 42, and the concrete 7 is sequentially discharged from the lower outlet 41 to the upper outlet 41, and the concrete 7 is averaged in the annular space 12 from the lower side to the upper side. To fill.
【００３５】コンクリート７は、環状空間部１２が狭く
縦長でも、下から順次均一に広がり上方に向かって効率
良く充填される。また、コンクリート７を高所まで運び
上げる必要がなく、その結果、コンクリート７を高所か
ら落下することにより、分離しばらけ、変質して強度の
低下が生じるといったことからも解放される。また、導
入管４２を内部筒体９の内側に立設した場合には、内部
筒体９の壁面にも該導入管４２の流出口４１に対応し
て、コンクリート７の出口４３を開口する必要がある
が、内部空間部１２の内側の広い作業空間での作業であ
るため開口や位置合わせ等が容易にできる他、この導入
管４２は内部筒体９を内側から支える補強部材として作
用する。また、導入管４２を内部筒体９の外側に立設し
た場合には、環状空間部１２のコーナー部等コンクリー
ト７が流動しにくい方向に向けてコンクリート７を直接
流出させることができ、この導入管４２はコンクリート
７内に補強材として埋設する。Even if the annular space 12 is narrow and vertically long, the concrete 7 spreads uniformly from the bottom and is efficiently filled upward. Further, it is not necessary to carry the concrete 7 up to a high place, and as a result, when the concrete 7 is dropped from a high place, the concrete 7 is separated and separated, and the quality is deteriorated to reduce the strength. Further, when the introducing pipe 42 is erected inside the inner tubular body 9, it is necessary to open the outlet 43 of the concrete 7 on the wall surface of the inner tubular body 9 corresponding to the outlet 41 of the introducing pipe 42. However, since the work is performed in a wide work space inside the internal space 12, the opening and the positioning can be easily performed, and the introduction pipe 42 functions as a reinforcing member that supports the internal tubular body 9 from the inside. Further, when the introduction pipe 42 is erected on the outer side of the inner cylindrical body 9, the concrete 7 can be directly flown out in a direction such as a corner portion of the annular space 12 in which the concrete 7 is hard to flow. The pipe 42 is embedded in the concrete 7 as a reinforcing material.
【００３６】上記鋼製脚柱の補強構造は、上記鋼製の中
空既設脚柱２と、該既設脚柱２の内部空間部６に立設し
た鋼製の内部筒体９と、該内部筒体９と既設脚柱２との
間の環状空間部１２に充填したコンクリート７と、上記
内部筒体９の内側又は外側に配設した単数のラセン状管
又は複数の垂直管若しくは複数の段状管で構成されるコ
ンクリート７充填導入管４２とからなるので、導入管４
２を内部筒体９の内側に設けた場合には導入管４２は内
部筒体９を内側から支える補強材、及びコンクリート７
の打設荷重を内側から支える補強材となり、導入管４２
を内部筒体９の外側に設けた場合には導入管４２はコン
クリート７に埋設される補強材となり、いずれの場合も
各部材が一体化した複合構造の一層強い補強脚柱とな
る。The reinforcing structure of the steel pedestal comprises a hollow existing stanchion 2 made of steel, an internal tubular body 9 made of steel erected in an internal space 6 of the existing stanchion 2, and the internal tubular body. Concrete 7 filled in the annular space 12 between the body 9 and the existing pedestal 2, and a single spiral pipe or a plurality of vertical pipes or a plurality of step pipes arranged inside or outside the inner tubular body 9 Since it is composed of the concrete 7 filling introduction pipe 42 composed of a pipe, the introduction pipe 4
When 2 is provided inside the inner tubular body 9, the introduction pipe 42 serves as a reinforcing material for supporting the inner tubular body 9 from the inside, and the concrete 7
It becomes a reinforcing material that supports the driving load of
When is provided outside the inner cylindrical body 9, the introduction pipe 42 serves as a reinforcing material embedded in the concrete 7, and in each case, it becomes a stronger reinforcing pedestal of a composite structure in which the respective members are integrated.
【００３７】上記導入管４２を単数のラセン状管で形成
した場合は、内部筒体９の外側に設けることによって、
内部筒体９にフープ力を与え脚柱の周方向の圧縮強度を
高め、コンクリート７も均一に連続して充填される。ま
た、上記導入管４２を複数の垂直管で形成した場合は、
内部筒体９の内側又は外側に等間隔に立設することによ
って、脚柱の曲げ強度を高める。なお、桁と直交する方
向に対称に２本の垂直管を設けると、橋脚横倒れに強い
効率的な補強が可能となる。さらにまた、上記導入管４
２を複数の段状管で形成し内部筒体９の外側に設けた場
合は、脚柱の周方向の強度を高め、高さ方向に必要とさ
れる脚柱の強度に対応してコンクリート７の強度を段状
に変化させて充填することができる。When the introduction pipe 42 is formed of a single spiral-shaped pipe, by providing it on the outside of the inner cylindrical body 9,
A hoop force is applied to the inner cylindrical body 9 to increase the circumferential compressive strength of the pedestal, and the concrete 7 is also uniformly and continuously filled. When the introduction pipe 42 is formed by a plurality of vertical pipes,
The bending strength of the pedestal is increased by erected at equal intervals inside or outside the inner tubular body 9. In addition, if two vertical pipes are provided symmetrically in the direction orthogonal to the girder, it is possible to effectively reinforce the pier sideways. Furthermore, the above-mentioned introduction pipe 4
When 2 is formed of a plurality of stepped pipes and provided outside the inner cylindrical body 9, the strength of the pedestal in the circumferential direction is increased, and the concrete 7 corresponding to the strength of the pedestal required in the height direction. Can be filled by changing the strength of the stepwise.
【００３８】[0038]
【発明の効果】この発明の鋼製脚柱の補強構造は、既設
脚柱の内部空間部に内部筒体を立設し、該内部筒体と既
設脚柱との間の環状空間部にコンクリートを充填して形
成したので、軽量な鋼材と必要最少量のコンクリートと
を一体化した強い複合構造の補強脚柱が得られる。ま
た、基礎や既設脚柱本体を拡幅等必要以上に補強する必
要がなく経済的な補強ができる。According to the reinforcing structure for steel pedestal of the present invention, an internal cylinder is erected in the internal space of the existing pedestal, and concrete is provided in the annular space between the internal cylinder and the existing pedestal. Since it is formed by filling with, it is possible to obtain a reinforced pedestal with a strong composite structure in which a lightweight steel material and a minimum amount of concrete are integrated. In addition, it is possible to economically reinforce the foundation and the existing pedestal main body without needing to reinforce them, such as widening them.
【００３９】また、既設脚柱の下部に形成した開口部か
ら鋼製の挿入板を該既設脚柱の内部空間部に挿入し、該
挿入板を内部空間部の基礎上にて複数枚接合してリング
壁を形成し、該リング壁を既設脚柱に沿って垂直に上昇
させ、順次上記上昇と接合を繰返しリング壁を継ぎ足し
て上記既設脚柱の内部空間部に内部筒体を立設し、上記
内部筒体と上記既設脚柱との間の環状空間部にコンクリ
ートを充填する鋼製脚柱の補強方法は、狭く密閉された
環状空間部内での高所作業及び危険な作業がなく、基礎
上の出入口付近の空間部及びその内側から低所で安全に
効率良く作業ができる。また、高さ方向に順次上昇延長
し、高い脚柱でも任意に連続し効率良く構築することが
できる。Further, a steel insertion plate is inserted into the internal space of the existing pedestal through an opening formed in the lower part of the existing pedestal, and a plurality of the insertion plates are joined on the foundation of the internal space. To form a ring wall, raise the ring wall vertically along the existing pedestal, and repeat the above-mentioned raising and joining in sequence to add the ring wall to set up an internal cylinder in the internal space of the existing pedestal. The reinforcing method of the steel pedestal that fills the annular space between the inner cylindrical body and the existing pedestal with concrete does not include high-place work and dangerous work in the narrowly sealed annular space, Work can be performed safely and efficiently at a low place from the space inside and near the doorway on the foundation and inside. In addition, it is possible to build up continuously and efficiently even in the case of a tall pedestal by gradually raising and extending in the height direction.
【００４０】また、鋼製の中空既設脚柱の下部側壁に開
口部を設け、上記既設脚柱の内部空間部の基礎上に上端
ラセン状の底部リングを設置し、該底部リングの上端に
走行ガイドを設け、上記開口部から鋼製の挿入板を該既
設脚柱の内部空間部に挿入し、上記走行ガイド上に案内
された上記挿入板を順次接合し回転させてラセン状の連
続したリング壁を組上げ内部筒体を立設し、上記内部筒
体と上記既設脚柱との間の環状空間部にコンクリートを
充填する鋼製脚柱の補強方法は、挿入板を円滑に挿入部
まで案内し、リング壁の接合組立て作業を一定箇所で移
動することなく効率良くできる。また、リング壁をラセ
ン状に回転させて連続して押上げるので、径が大きく高
さが高い内部筒体でも安全に効率良く構築することがで
きる。Further, an opening is provided in the lower side wall of the existing hollow steel pedestal, and a bottom ring having an upper end spiral shape is installed on the foundation of the internal space of the existing pedestal, and the upper end of the bottom ring runs. A guide is provided, a steel insert plate is inserted into the internal space of the existing pedestal through the opening, and the insert plates guided on the running guides are sequentially joined and rotated to form a spiral continuous ring. The method of reinforcing the steel pedestal by assembling the wall and erection of the internal cylinder and filling the annular space between the internal cylinder and the existing pedestal with concrete is to guide the insertion plate smoothly to the insertion part. However, the work of joining and assembling the ring walls can be efficiently performed without moving at a fixed location. Further, since the ring wall is rotated in a spiral shape and continuously pushed up, it is possible to safely and efficiently construct an internal cylinder having a large diameter and a high height.
【００４１】また、環状空間部にコンクリートを充填す
るに当たり、コンクリートが流出する複数の流出口を上
下方向にわたって所定間隔をおいて形成した導入管を上
記内部筒体の内側又は外側に立設し、該導入管の下部入
口からコンクリートを圧入し、順次上部へとコンクリー
トを流出させ上記環状空間部にコンクリートを充填する
鋼製脚柱の補強方法は、コンクリートは狭い環状空間部
に下から順次均一に広がり効率良く充填される。またコ
ンクリートは、ばらけたり打ち継ぎがない品質の良い強
度の高いコンクリートが充填できる。Further, when filling the annular space with concrete, introducing pipes having a plurality of outlets through which the concrete flows out are formed at predetermined intervals in the vertical direction, and are installed upright inside or outside the internal cylinder. The method of reinforcing the steel pedestal is to press concrete into the lower inlet of the introduction pipe, and then to let the concrete flow out to the upper part and to fill the annular space with concrete. Spreads and is filled efficiently. In addition, concrete can be filled with high-quality concrete of good quality that does not come apart or are spliced.
【００４２】また、上記鋼製の中空既設脚柱と、該既設
脚柱の内部空間部に立設した鋼製の内部筒体と、該内部
筒体と既設脚柱との間の環状空間部に充填したコンクリ
ートと、上記内部筒体の内側又は外側に配設した単数の
ラセン状管又は複数の垂直管若しくは複数の段状管で構
成されるコンクリート充填導入管とからなる鋼製脚柱の
補強構造は、該導入管が内部筒体の補強材又はコンクリ
ートの補強材となり、各部材が一体化した複合構造の一
層強い補強脚柱が得られる。Also, the hollow existing stanchions made of steel, the internal cylinder made of steel erected in the internal space of the existing stanchions, and the annular space between the internal cylinder and the existing stanchions. Of the steel pedestal consisting of the concrete filled in and the concrete filling introduction pipe composed of a single spiral pipe or a plurality of vertical pipes or a plurality of step pipes arranged inside or outside the internal cylinder In the reinforcement structure, the introduction pipe serves as a reinforcement material for the inner cylinder or a reinforcement material for concrete, and a stronger reinforcement pillar having a composite structure in which the respective members are integrated can be obtained.
【図１】この発明に係る鋼製の既設脚柱を補強する実施
例の斜視側断面説明図で、（ａ）は円形筒状の脚柱を補
強する場合を示し、（ｂ）は矩形筒状の脚柱を補強する
場合を示す。FIG. 1 is a perspective side sectional explanatory view of an embodiment for reinforcing an existing steel pedestal according to the present invention, (a) showing a case of reinforcing a circular cylindrical pedestal, and (b) showing a rectangular tube. The case of reinforcing a column-shaped pedestal is shown.
【図２】上記実施例の橋脚上部を拡大して示す側断面説
明図である。FIG. 2 is an explanatory side sectional view showing an enlarged upper part of the pier of the embodiment.
【図３】内部筒体を構築する実施例で、ジャッキアップ
で組立てる場合を示す一部を欠除した斜視断面説明図で
ある。FIG. 3 is a partially cutaway perspective cross-sectional explanatory view showing a case of assembling by a jack-up in an example of constructing an internal cylinder.
【図４】内部筒体を構築する実施例の側断面説明図で、
（ａ）は地上付近から吊り上げ組立てる場合を示し、
（ｂ）は上部から吊り上げ組立てる場合を示す。FIG. 4 is a side cross-sectional explanatory view of an embodiment for constructing an internal cylinder,
(A) shows the case of lifting and assembling from near the ground,
(B) shows the case of hoisting and assembling from the upper part.
【図５】内部筒体を構築する実施例の側断面説明図で、
円形の内部筒体をラセン状に組上げる場合を示す。FIG. 5 is a side cross-sectional explanatory view of an embodiment for constructing an internal cylinder,
The case where a circular inner cylinder is assembled into a spiral shape is shown.
【図６】環状空間部にコンクリートを充填する実施例の
側断面説明図で、（ａ）は導入管を内部筒体の内側に立
設した場合を示し、（ｂ）は導入管を内部筒体の外側に
立設した場合を示す。6A and 6B are side cross-sectional explanatory views of an embodiment in which the annular space is filled with concrete. FIG. 6A shows a case where the introduction pipe is erected inside the inner cylinder, and FIG. 6B shows the introduction pipe. Shown when standing upright on the outside of the body.
【図７】鋼製の既設脚柱を補強する従来例の斜視断面説
明図で、（ａ）は円形筒状、（ｂ）は矩形筒状の既設脚
柱の場合を示す。7A and 7B are perspective cross-sectional explanatory views of a conventional example for reinforcing an existing steel pedestal, in which FIG. 7A shows a case of a circular tubular shape and FIG.
１ 橋脚 １０１ 橋脚 ２ 脚柱 １０２ 脚柱 ３ フーチング １０３，１０３Ａ フ
ーチング ４ 杭 １０４，１０４Ａ 杭 ５ 横梁部 １０５ 横梁部 ５Ａ 横梁部上端 １０６ 空間部 ５Ｂ 横梁部下端 １０７ コンクリー
ト ６ 空間部 １０８ 基礎 ７ コンクリート ８ 基礎 ２５ 吊り装置 ９ 内部筒体 ２６ 吊りワイヤ １０ 頂部支承端 ２７ 吊り端部 １１ 頂部開口 ３０ 挿入板 １２ 環状空間部 ３１ リング壁 １３，１３Ａ，１３Ｂ リング壁 ３２ 底部リング １４ 開口部 ３３ 走行ガイド １５，１５Ａ，１５Ｂ 挿入板 ３４ 係合回転機
構 １６ 端面 ３５ モーター １７ ジャッキ ３６ 挿入部 １８，１８Ａ，１８Ｂ ガイド ３７ 接合部 １９ 補強リング ３８ ローラー架
台 ２０ 頂部リング ３９ ガイドロー
ラー ２１ 吊り支点 ４０ フック ２２ 吊り具 ４１ 流出口 ２３ 吊りピース ４２ 導入管 ２４ 吊り支点 ４３ 出口1 Bridge Pier 101 Bridge Pier 2 Pillar 102 Pillar 3 Footing 103, 103A Footing 103 Pile 104, 104A Pile 5 Cross beam part 105 Cross beam part 5A Cross beam part upper end 106 Space part 5B Cross beam part lower end 107 Concrete 6 Space part 108 Foundation 7 Concrete 8 Foundation 25 Suspension Device 9 Internal Cylinder 26 Suspension Wire 10 Top Support End 27 Suspension End 11 Top Opening 30 Insert Plate 12 Annular Space 31 Ring Wall 13, 13A, 13B Ring Wall 32 Bottom Ring 14 Opening 33 Travel Guide 15, 15A , 15B Insertion plate 34 Engagement rotation mechanism 16 End surface 35 Motor 17 Jack 36 Insertion portion 18, 18A, 18B Guide 37 Joint portion 19 Reinforcement ring 38 Roller mount 20 Top ring 39 Guide roller 21 Suspension fulcrum 40 Hook 22 Suspension tool 41 Flow Mouth 23 hanging piece 42 inlet tube 24 hanging fulcrum 43 outlet
Claims (5)
端部を基礎上に固定しかつ上端部を既設脚柱上部の横梁
部に固定した鋼製の内部筒体を立設し、該内部筒体と上
記既設脚柱との間の環状空間部にコンクリートを充填し
て形成したことを特徴とする鋼製脚柱の補強構造。1. A steel internal cylinder having a lower end fixed to a foundation and an upper end fixed to a horizontal beam above the existing pedestal is erected in the internal space of the existing hollow pedestal made of steel. A reinforcing structure for a steel pedestal, characterized in that the annular space between the inner cylindrical body and the existing pedestal is formed by filling with concrete.
を設け、該開口部から鋼製の挿入板を該既設脚柱の内部
空間部に挿入し、該挿入板を内部空間部の基礎上にて複
数枚接合してリング壁を形成し、該リング壁を既設脚柱
に沿って垂直に上昇させ、該リング壁の下部に挿入板を
接合して下部リング壁を形成し、順次上記上昇と接合を
繰返しリング壁を継ぎ足して上記既設脚柱の内部空間部
に内部筒体を立設し、上記開口部を閉塞した後上記内部
筒体と上記既設脚柱との間の環状空間部にコンクリート
を充填することを特徴とする鋼製脚柱の補強方法。2. An opening is provided in a lower side wall of an existing steel pedestal, and an insertion plate made of steel is inserted into the internal space of the existing pedestal through the opening, and the insertion plate is inserted into the internal space. To form a ring wall by joining a plurality of on the foundation of, the ring wall is vertically raised along the existing pedestal, the lower plate of the ring wall is joined to form the lower ring wall, The inner cylinder is erected in the inner space of the existing stanchion by repeating the above-mentioned rising and joining and sequentially adding the ring wall, and after closing the opening, the annular shape between the inner cylinder and the existing stanchion. A method of reinforcing a steel pedestal, characterized by filling space with concrete.
を設け、上記既設脚柱の内部空間部の基礎上に上端ラセ
ン状の底部リングを設置し、該底部リングの上端に走行
ガイドを設け、上記開口部から鋼製の挿入板を該既設脚
柱の内部空間部に挿入し、上記走行ガイド上に案内させ
た上記挿入板を順次接合し回転させてラセン状の連続し
たリング壁を組上げ内部筒体を立設し、上記開口部を閉
塞した後上記内部筒体と上記既設脚柱との間の環状空間
部にコンクリートを充填することを特徴とする鋼製脚柱
の補強方法。3. A steel hollow existing pedestal is provided with an opening in a lower side wall thereof, a bottom ring having an upper end spiral shape is installed on a foundation of an internal space of the existing pedestal, and the upper end of the bottom ring is run. A guide is provided, a steel insert plate is inserted into the internal space of the existing pedestal through the opening, and the insert plates guided on the running guides are sequentially joined and rotated to form a spiral continuous ring. Reinforcement of steel stanchions, characterized in that a wall is assembled and an internal cylinder is erected, the opening is closed, and then the annular space between the internal cylinder and the existing stanchion is filled with concrete. Method.
製の中空既設脚柱との間の環状空間部にコンクリートを
充填するに当たり、コンクリートが流出する複数の流出
口を上下方向にわたって所定間隔をおいて形成した導入
管を上記内部筒体の内側又は外側に立設し、該導入管の
下部入口からコンクリートを圧入し、下部の流出口から
上部の流出口へと順次コンクリートを流出させ上記環状
空間部にコンクリートを充填することを特徴とする請求
項２又は３記載の鋼製脚柱の補強方法。4. When filling an annular space between a steel inner cylindrical body and an existing steel hollow pedestal located outside thereof with concrete, a plurality of outlets through which the concrete flows out are vertically arranged. Introducing inlet pipes formed at predetermined intervals inside or outside the inner cylinder, concrete is press-fitted from the lower inlet of the inlet pipe, and concrete is sequentially discharged from the lower outlet to the upper outlet. The method for reinforcing a steel pillar according to claim 2 or 3, wherein the annular space is filled with concrete.
部空間部に立設した鋼製の内部筒体と、該内部筒体と既
設脚柱との間の環状空間部に充填したコンクリートと、
上記内部筒体の内側又は外側に配設した単数のラセン状
管又は複数の垂直管若しくは複数の段状管で構成される
コンクリート充填導入管とからなる鋼製脚柱の補強構
造。5. A hollow existing steel stanchion, a steel internal cylinder standing upright in the internal space of the existing stanchion, and an annular space between the internal cylinder and the existing stanchion. Filled concrete,
A reinforcing structure for a steel pedestal, comprising a single spiral pipe arranged inside or outside the inner cylinder, or a concrete filling introduction pipe constituted by a plurality of vertical pipes or a plurality of step pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15405795A JP3470246B2 (en) | 1995-05-30 | 1995-05-30 | Method of reinforcing steel pedestal and reinforced pedestal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15405795A JP3470246B2 (en) | 1995-05-30 | 1995-05-30 | Method of reinforcing steel pedestal and reinforced pedestal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08326014A true JPH08326014A (en) | 1996-12-10 |
| JP3470246B2 JP3470246B2 (en) | 2003-11-25 |
Family
ID=15575975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15405795A Expired - Fee Related JP3470246B2 (en) | 1995-05-30 | 1995-05-30 | Method of reinforcing steel pedestal and reinforced pedestal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3470246B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009068334A (en) * | 2008-12-26 | 2009-04-02 | Mitsui Eng & Shipbuild Co Ltd | Steel-made pier having bearing core material |
| JP2013256788A (en) * | 2012-06-12 | 2013-12-26 | Toa Harbor Works Co Ltd | Structure body and lining method using fiber-reinforced cementitious composite with multiple fine cracks |
| CN110656574A (en) * | 2018-06-29 | 2020-01-07 | 比亚迪股份有限公司 | Method for manufacturing bridge pier |
| CN111705553A (en) * | 2020-05-20 | 2020-09-25 | 安徽浦进轨道装备有限公司 | Vehicle track supporting component |
| CN112376408A (en) * | 2020-11-18 | 2021-02-19 | 福州大学 | UHPC hollow column pier and construction method thereof |
| JP2023165547A (en) * | 2022-05-06 | 2023-11-16 | 株式会社クリコン | Method for producing synthetic box culvert, and synthetic box culvert |
-
1995
- 1995-05-30 JP JP15405795A patent/JP3470246B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009068334A (en) * | 2008-12-26 | 2009-04-02 | Mitsui Eng & Shipbuild Co Ltd | Steel-made pier having bearing core material |
| JP2013256788A (en) * | 2012-06-12 | 2013-12-26 | Toa Harbor Works Co Ltd | Structure body and lining method using fiber-reinforced cementitious composite with multiple fine cracks |
| CN110656574A (en) * | 2018-06-29 | 2020-01-07 | 比亚迪股份有限公司 | Method for manufacturing bridge pier |
| CN110656574B (en) * | 2018-06-29 | 2022-03-18 | 比亚迪股份有限公司 | Method for manufacturing bridge pier |
| CN111705553A (en) * | 2020-05-20 | 2020-09-25 | 安徽浦进轨道装备有限公司 | Vehicle track supporting component |
| CN112376408A (en) * | 2020-11-18 | 2021-02-19 | 福州大学 | UHPC hollow column pier and construction method thereof |
| JP2023165547A (en) * | 2022-05-06 | 2023-11-16 | 株式会社クリコン | Method for producing synthetic box culvert, and synthetic box culvert |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3470246B2 (en) | 2003-11-25 |
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