JP6271207B2 - Steel pipe reinforcing method and reinforcing device - Google Patents

Steel pipe reinforcing method and reinforcing device Download PDF

Info

Publication number
JP6271207B2
JP6271207B2 JP2013210913A JP2013210913A JP6271207B2 JP 6271207 B2 JP6271207 B2 JP 6271207B2 JP 2013210913 A JP2013210913 A JP 2013210913A JP 2013210913 A JP2013210913 A JP 2013210913A JP 6271207 B2 JP6271207 B2 JP 6271207B2
Authority
JP
Japan
Prior art keywords
steel pipe
support
support portions
local load
moving mechanism
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.)
Active
Application number
JP2013210913A
Other languages
Japanese (ja)
Other versions
JP2015074902A (en
Inventor
北村　精男
北村　　精男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GIKEN LTD.
Original Assignee
GIKEN LTD.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GIKEN LTD. filed Critical GIKEN LTD.
Priority to JP2013210913A priority Critical patent/JP6271207B2/en
Publication of JP2015074902A publication Critical patent/JP2015074902A/en
Application granted granted Critical
Publication of JP6271207B2 publication Critical patent/JP6271207B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Piles And Underground Anchors (AREA)

Description

本発明は、鋼管の補強方法及び補強装置に関する。   The present invention relates to a steel pipe reinforcing method and a reinforcing device.

一般に、土留壁では壁面に支保工を設置するが、鋼管矢板や鋼管杭では鋼管が支保工と線接触するため、鋼管側面には局部荷重が作用する。
また、建築物の柱・梁接合部において柱が鋼管である場合も同様である。
鋼管矢板土留壁や建築物の鋼管柱・梁接合部などにおいて鋼管柱の側面に局部荷重が作用すると、鋼管側面は凹みなど損傷を受ける虞がある。
そこで、これら鋼管側面に作用する局部荷重に対しその作用点位置の鋼管の内部に補強部材を挿入して鋼管を補強することが行われる。そのために、例えば、特許文献１にあっては、短尺のコンクリート柱を膨張セメントで鋼管杭内に固着する。また特許文献２にあっては、縦リブを有する治具を梁接合位置の鋼管柱内部に溶接固定する。
また、特許文献３には、鋼管と鋼管との継手部に設置されるリング状の本体を成した継手部裏当リングが記載されている。この継手部裏当リングは、外周に設けられた突起部で溶接間隔を保持するためのものであって、リング本体に設けられたテーパー状スリットに楔を打ち込んでリング本体を拡径させて鋼管に密着安定させることができる。 In general, the retaining wall is installed on the wall surface of the retaining wall, but in the steel pipe sheet pile and steel pipe pile, the steel pipe is in line contact with the supporting structure, so that a local load acts on the side surface of the steel pipe.
The same applies to the case where the column is a steel pipe at the column / beam joint of the building.
If a local load is applied to the side surface of a steel pipe column in a steel pipe sheet pile retaining wall or a steel pipe column / beam joint of a building, the side surface of the steel pipe may be damaged, such as a dent.
Therefore, it is performed to reinforce the steel pipe by inserting a reinforcing member into the steel pipe at the position of the action point against the local load acting on the side surfaces of the steel pipe. For this purpose, for example, in Patent Document 1, a short concrete column is fixed in a steel pipe pile with expanded cement. Moreover, in patent document 2, the jig | tool which has a vertical rib is weld-fixed inside the steel pipe pillar of a beam joining position.
Patent Document 3 describes a joint portion backing ring that forms a ring-shaped main body that is installed in a joint portion between a steel pipe and a steel pipe. This joint portion backing ring is for maintaining the welding interval with the protrusion provided on the outer periphery, and the wedge is driven into a tapered slit provided on the ring body to expand the diameter of the ring body, thereby Can be adhered and stabilized.

特開昭５５−０９８５２４号公報JP 55-098524 A 特開平０６−２８８００１号公報Japanese Patent Laid-Open No. 06-288001 特開２００３−２８６７１８号公報JP 2003-286718 A

しかし、以上の従来技術にあっては次のような課題がある。
特許文献１に記載の方法では、膨張セメントを充填する作業や、その膨張セメントの硬化・強度発現を待たなければならず、補強完了までに時間を要して効率的でない。
特許文献２に記載の方法では、治具を鋼管内部に溶接するため、補強個所が鋼管の開口端より遠い中ほどになるほど、治具の位置決めや溶接作業が困難となり、相当の労力を要する。
特許文献３に記載の継手部裏当リングは、鋼管と鋼管の継手部にしか設置できず、かつ、外圧に対する補強を目的としておらず補強効果があまり期待でいない。
また以上の何れの従来技術においても、補強部材は１個所ずつの設置となり作業効率が悪いほか、補強が不要となった場合には容易に補強部材を撤去・回収ができず不経済である。 However, the above conventional techniques have the following problems.
In the method described in Patent Document 1, it is necessary to wait for the work of filling the expanded cement and the hardening / strength of the expanded cement, and it takes time to complete the reinforcement, which is not efficient.
In the method described in Patent Document 2, since the jig is welded to the inside of the steel pipe, the positioning of the jig and the welding operation become more difficult as the reinforcing part is farther from the opening end of the steel pipe, and considerable labor is required.
The joint portion backing ring described in Patent Document 3 can be installed only at the joint portion of a steel pipe and a steel pipe, and is not intended to reinforce against external pressure, and is not expected to have a reinforcing effect.
In any of the above prior arts, the reinforcing members are installed one by one, resulting in poor work efficiency. In addition, when the reinforcement is unnecessary, the reinforcing members cannot be easily removed and collected, which is uneconomical.

本発明は以上の従来技術における問題に鑑みてなされたものであって、鋼管の軸方向の任意の１又は２以上の個所を鋼管内部から補強するにあたり、所要の個所を作業効率よく補強でき、再利用性があって工期の短縮、工事費の節減に寄与できる鋼管の補強方法及び補強装置を提供することを課題とする。   The present invention has been made in view of the problems in the prior art described above, and in reinforcing any one or two or more locations in the axial direction of the steel pipe from the inside of the steel pipe, the required locations can be reinforced with good work efficiency. It is an object of the present invention to provide a steel pipe reinforcing method and a reinforcing device that are reusable and can contribute to shortening the construction period and reducing construction costs.

以上の課題を解決するための請求項１記載の発明は、側面に支保工が架設され当該側面に当該支保工から局部荷重を受ける鋼管の、当該支保工からの局部荷重作用点に相当する鋼管内面を支持して当該局部荷重に対する構造強度を補強する補強装置を鋼管の内部に着脱自在に設置する鋼管の補強方法であって、
前記補強装置として、鋼管内面と略等価曲率の支持面をそれぞれ有し、鋼管軸を中心にして前記支持面が外向きに配置される複数の支持部と、前記複数の支持部が鋼管軸を中心に集散するよう半径方向に前記複数の支持部を相対的に移動させる移動機構と、を備え、前記支持面が鋼管軸を中心とした最大径部位とされ、前記移動機構による前記最大径部位の径の拡大に伴い前記支持面を鋼管内面に当接させて鋼管内部に設置可能にされたものを用い、
前記支持面を、前記局部荷重作用点に相当する鋼管内面に当接させて、前記補強装置を鋼管内部に設置する鋼管の補強方法である。 The invention according to claim 1 for solving the above-mentioned problems is a steel pipe corresponding to a local load acting point from the support work of a steel pipe having a support work constructed on the side face and receiving a local load from the support work on the side face. A steel pipe reinforcing method in which a reinforcing device that supports the inner surface and reinforces the structural strength against the local load is detachably installed inside the steel pipe ,
The reinforcing device has a steel pipe inner surface and a support surface having a substantially equivalent curvature, respectively, and a plurality of support portions in which the support surface is arranged outwardly about the steel pipe shaft, and the plurality of support portions have a steel pipe shaft. A moving mechanism that relatively moves the plurality of support portions in the radial direction so as to converge in the center, and the support surface is a maximum diameter portion centered on a steel pipe shaft, and the maximum diameter portion by the moving mechanism With the expansion of the diameter of the steel pipe, the support surface is brought into contact with the inner surface of the steel pipe and can be installed inside the steel pipe.
It is a steel pipe reinforcing method in which the support surface is brought into contact with an inner surface of a steel pipe corresponding to the local load acting point, and the reinforcing device is installed inside the steel pipe.

請求項２記載の発明は、前記支持面を、前記局部荷重作用点に相当する鋼管内面に当接させて、前記補強装置を鋼管内部に設置した後、
前記移動機構により前記最大径部位の径を縮小させて前記補強装置を前記鋼管内から撤去する請求項１に記載の鋼管の補強方法である。 In the invention according to claim 2, after the support surface is brought into contact with the inner surface of the steel pipe corresponding to the local load acting point, and the reinforcing device is installed inside the steel pipe,
The steel pipe reinforcing method according to claim 1, wherein the diameter of the maximum diameter portion is reduced by the moving mechanism and the reinforcing device is removed from the steel pipe.

請求項３記載の発明は、側面に局部荷重を受ける鋼管の、当該局部荷重作用点に相当する鋼管内面を支持して当該局部荷重に対する構造強度を補強する補強装置であって、
鋼管内面と略等価曲率の支持面をそれぞれ有し、鋼管軸を中心にして前記支持面が外向きに配置される複数の支持部と、
前記複数の支持部が鋼管軸を中心に集散するよう半径方向に前記複数の支持部を相対的に移動させる移動機構と、
を備え、
前記支持面が鋼管軸を中心とした最大径部位とされ、前記移動機構による前記最大径部位の径の拡大に伴い前記支持面を鋼管内面に当接させて鋼管内部に設置可能にされ、
前記移動機構は、動力装置と、前記動力装置の動力を前記複数の支持部に伝達する伝達機構とによって前記複数の支持部を、鋼管軸を中心とした半径方向に移動させる機構であり、
前記動力装置の出力軸が鋼管軸上に配置される鋼管の補強装置である。 The invention according to claim 3 is a reinforcing device that reinforces the structural strength against the local load by supporting the inner surface of the steel pipe that corresponds to the local load acting point of the steel pipe that receives the local load on the side surface,
A plurality of support portions each having a support surface having a substantially equivalent curvature and a steel pipe inner surface, the support surfaces being arranged outwardly about the steel pipe axis;
A moving mechanism that relatively moves the plurality of support portions in a radial direction so that the plurality of support portions converge around a steel pipe axis;
With
The support surface is a maximum diameter portion centered on a steel pipe shaft, and the support surface is brought into contact with the inner surface of the steel pipe as the diameter of the maximum diameter portion is increased by the moving mechanism, and can be installed inside the steel pipe .
The moving mechanism is a mechanism that moves the plurality of support portions in a radial direction around a steel pipe shaft by a power device and a transmission mechanism that transmits power of the power device to the plurality of support portions.
It is a steel pipe reinforcement device in which the output shaft of the power unit is disposed on the steel pipe shaft .

請求項４記載の発明は、側面に局部荷重を受ける鋼管の、当該局部荷重作用点に相当する鋼管内面を支持して当該局部荷重に対する構造強度を補強する補強装置であって、
鋼管内面と略等価曲率の支持面をそれぞれ有し、鋼管軸を中心にして前記支持面が外向きに配置される複数の支持部と、
前記複数の支持部が鋼管軸を中心に集散するよう半径方向に前記複数の支持部を相対的に移動させる移動機構と、
を備え、
前記支持面が鋼管軸を中心とした最大径部位とされ、前記移動機構による前記最大径部位の径の拡大に伴い前記支持面を鋼管内面に当接させて鋼管内部に設置可能にされ、
前記移動機構は、複動シリンダーと、前記複動シリンダーの動力を前記複数の支持部に伝達するコッタとによって前記複数の支持部を、鋼管軸を中心とした半径方向に移動させる機構であり、
前記複動シリンダーの出力軸が鋼管軸上に配置される鋼管の補強装置である。 The invention described in claim 4 is a reinforcing device that reinforces the structural strength against the local load by supporting the inner surface of the steel pipe that corresponds to the local load acting point of the steel pipe that receives the local load on the side surface,
A plurality of support portions each having a support surface having a substantially equivalent curvature and a steel pipe inner surface, the support surfaces being arranged outwardly about the steel pipe axis;
A moving mechanism that relatively moves the plurality of support portions in a radial direction so that the plurality of support portions converge around a steel pipe axis;
With
The support surface is a maximum diameter portion centered on a steel pipe shaft, and the support surface is brought into contact with the inner surface of the steel pipe as the diameter of the maximum diameter portion is increased by the moving mechanism, and can be installed inside the steel pipe.
The moving mechanism is a mechanism that moves the plurality of support portions in a radial direction around a steel pipe axis by a double-action cylinder and a cotter that transmits the power of the double-action cylinder to the plurality of support portions.
A steel pipe reinforcing device in which an output shaft of the double-acting cylinder is disposed on a steel pipe shaft .

請求項５記載の発明は、側面に局部荷重を受ける鋼管の、当該局部荷重作用点に相当する鋼管内面を支持して当該局部荷重に対する構造強度を補強する補強装置であって、
鋼管内面と略等価曲率の支持面をそれぞれ有し、鋼管軸を中心にして前記支持面が外向きに配置される複数の支持部と、
前記複数の支持部が鋼管軸を中心に集散するよう半径方向に前記複数の支持部を相対的に移動させる移動機構と、
を備え、
前記支持面が鋼管軸を中心とした最大径部位とされ、前記移動機構による前記最大径部位の径の拡大に伴い前記支持面を鋼管内面に当接させて鋼管内部に設置可能にされ、
前記移動機構は、モーターと、前記モーターの動力を前記複数の支持部に伝達するネジ及び歯車機構とによって前記複数の支持部を、鋼管軸を中心とした半径方向に移動させる機構であり、
前記モーターの出力軸が鋼管軸上に配置される鋼管の補強装置である。
請求項６記載の発明は、側面に局部荷重を受ける鋼管の、当該局部荷重作用点に相当する鋼管内面を支持して当該局部荷重に対する構造強度を補強する補強装置であって、
鋼管内面と略等価曲率の支持面をそれぞれ有し、鋼管軸を中心にして前記支持面が外向きに配置される複数の支持部と、
前記複数の支持部が鋼管軸を中心に集散するよう半径方向に前記複数の支持部を相対的に移動させる移動機構と、
を備え、
前記支持面が鋼管軸を中心とした最大径部位とされ、前記移動機構による前記最大径部位の径の拡大に伴い前記支持面を鋼管内面に当接させて鋼管内部に設置可能にされ、
前記移動機構は、複動シリンダーと、前記複動シリンダーの動力を前記複数の支持部に伝達するリンク機構とによって前記複数の支持部を、鋼管軸を中心とした半径方向に移動させる機構であり、
前記複動シリンダーの出力軸が鋼管軸上に配置される鋼管の補強装置である。 The invention according to claim 5 is a reinforcing device that reinforces the structural strength against the local load by supporting the steel pipe inner surface corresponding to the local load acting point of the steel pipe that receives the local load on the side surface,
A plurality of support portions each having a support surface having a substantially equivalent curvature and a steel pipe inner surface, the support surfaces being arranged outwardly about the steel pipe axis;
A moving mechanism that relatively moves the plurality of support portions in a radial direction so that the plurality of support portions converge around a steel pipe axis;
With
The support surface is a maximum diameter portion centered on a steel pipe shaft, and the support surface is brought into contact with the inner surface of the steel pipe as the diameter of the maximum diameter portion is increased by the moving mechanism, and can be installed inside the steel pipe.
The moving mechanism is a mechanism that moves the plurality of support portions in a radial direction around a steel pipe axis by a motor and a screw and gear mechanism that transmits power of the motor to the plurality of support portions.
It is a steel pipe reinforcement device in which the output shaft of the motor is disposed on the steel pipe shaft .
The invention according to claim 6 is a reinforcing device that reinforces the structural strength against the local load by supporting the inner surface of the steel pipe corresponding to the local load acting point of the steel pipe that receives the local load on the side surface,
A plurality of support portions each having a support surface having a substantially equivalent curvature and a steel pipe inner surface, the support surfaces being arranged outwardly about the steel pipe axis;
A moving mechanism that relatively moves the plurality of support portions in a radial direction so that the plurality of support portions converge around a steel pipe axis;
With
The support surface is a maximum diameter portion centered on a steel pipe shaft, and the support surface is brought into contact with the inner surface of the steel pipe as the diameter of the maximum diameter portion is increased by the moving mechanism, and can be installed inside the steel pipe.
The moving mechanism is a mechanism that moves the plurality of support portions in a radial direction around a steel pipe axis by a double-action cylinder and a link mechanism that transmits power of the double-action cylinder to the plurality of support portions. ,
A steel pipe reinforcing device in which an output shaft of the double-acting cylinder is disposed on a steel pipe shaft.

本発明によれば、補強装置を鋼管の内部に着脱自在に設置するので、短時間で補強を完了でき、位置決めのやり直しも容易であり、所要の個所を作業効率よく補強できる。補強が不要となった場合には、補強装置を容易に撤去、回収することができ、また、補強装置が撤去できるので、補強装置のみならず鋼管の再利用をも図ることができる。以上により、工期の短縮、工事費の節減に寄与することができる。   According to the present invention, since the reinforcing device is detachably installed inside the steel pipe, the reinforcement can be completed in a short time, the positioning can be easily performed again, and a required portion can be reinforced with high work efficiency. When reinforcement is no longer necessary, the reinforcement device can be easily removed and recovered, and since the reinforcement device can be removed, not only the reinforcement device but also the steel pipe can be reused. As a result, the construction period can be shortened and construction costs can be reduced.

本発明の一実施形態による鋼管の補強構造の縦断面図である。It is a longitudinal cross-sectional view of the reinforcement structure of the steel pipe by one Embodiment of this invention. 本発明の一構成例である補強装置を含む補強個所の垂直方向視模式図(a)及び水平方向視模式図(b)である。FIG. 2 is a schematic view in a vertical direction (a) and a schematic view in a horizontal direction (b) of a reinforcing part including a reinforcing device that is one configuration example of the present invention. 本発明の他の一構成例である補強装置を含む補強個所の垂直方向視模式図(a)及び水平方向視模式図(b)である。FIG. 6 is a schematic view in a vertical direction (a) and a schematic view in a horizontal direction (b) of a reinforcing part including a reinforcing device as another configuration example of the present invention. 本発明の他の一構成例である補強装置を含む補強個所の垂直方向視模式図(a)及び水平方向視模式図(b)である。FIG. 6 is a schematic view in a vertical direction (a) and a schematic view in a horizontal direction (b) of a reinforcing part including a reinforcing device as another configuration example of the present invention.

以下に本発明の一実施形態につき図面を参照して説明する。以下は本発明の一実施形態であって本発明を限定するものではない。   An embodiment of the present invention will be described below with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

図１に示すように、立坑など鋼管を用いた連続壁の鋼管１００の側面１０１，１０１，・・・に支保工２００，２００，・・・が架設される構造において、補強装置１，１，・・・を鋼管１００の内部に着脱自在に設置して補強する場合について説明する。
鋼管１００背面に作用する土水圧は支保工２００によって支持されるが、支保工２００と線接触する鋼管１００の側面１０１には支保工２００からの反力が局部荷重として作用する。この場合、鋼管１００は局部荷重によって凹み等の損傷を受ける虞があるため、その局部荷重作用点に相当する鋼管内面１０２を補強装置１によって内側から突っ張るようにして支持することで当該局部荷重に対する補強を行う。 As shown in FIG. 1, in a structure in which support works 200, 200,... Are installed on side surfaces 101, 101,. Will be described in which the steel pipe 100 is detachably installed and reinforced.
The earth and water pressure acting on the back surface of the steel pipe 100 is supported by the support work 200, but the reaction force from the support work 200 acts as a local load on the side surface 101 of the steel pipe 100 in line contact with the support work 200. In this case, since the steel pipe 100 may be damaged by a local load such as a dent, the steel pipe inner surface 102 corresponding to the local load acting point is supported by the reinforcing device 1 so as to be stretched from the inside, thereby supporting the local load. Reinforce.

図１に示すように、鋼管１００の軸方向に位置の異なる２以上の補強対象個所の内部に補強装置１，１，・・・をそれぞれ設置するに場合には、ワイヤーや棒材などの連結材２により補強装置１，１，・・・を連結して鋼管１００内に挿入する。
それには、まず、補強対象個所の数に相等する数の補強装置１を用意する。補強対象個所がＮ個所であるとすると、補強装置１をＮ個用意する。なお、図１では３個所分を図示する。
最下位置の補強対象個所を１番目として、上へ向って２番目、３番目、・・・Ｎ番目とする。１番目を補強する補強装置１と２番目を補強する補強装置１とを、１番目と２番目の補強対象個所の間隔に相等する間隔で連結材２により連結する。１番目、２番目の補強対象個所にそれぞれ補強装置１を精度良く配置するためである。この間隔は、予め決まっているので連結材２の長さを適宜合うように調整しておけばよい。
同様にして、２番目を補強する補強装置１と３番目を補強する補強装置１とを、２番目と３番目の補強対象個所の間隔に相等する間隔で連結材２により連結する。 As shown in FIG. 1, in the case where reinforcing devices 1, 1,... Are installed inside two or more reinforcement target portions having different positions in the axial direction of the steel pipe 100, connection of wires, rods, etc. The reinforcing devices 1, 1,... Are connected by the material 2 and inserted into the steel pipe 100.
For this purpose, first, a number of reinforcing devices 1 equivalent to the number of reinforcement target portions are prepared. If there are N places to be reinforced, N reinforcing devices 1 are prepared. In FIG. 1, three parts are shown.
The lowermost position to be reinforced is first, second upward, third,... Nth. The reinforcing device 1 that reinforces the first and the reinforcing device 1 that reinforces the second are connected by a connecting member 2 at an interval equivalent to the interval between the first and second reinforcement target portions. This is because the reinforcing device 1 is accurately arranged at the first and second reinforcement target portions. Since this interval is determined in advance, the length of the connecting member 2 may be adjusted so as to match appropriately.
Similarly, the reinforcing device 1 that reinforces the second and the reinforcing device 1 that reinforces the third are connected by the connecting member 2 at an interval equivalent to the interval between the second and third reinforcement target portions.

さらにＮ番目を補強する補強装置１に連結材２を連結して、この連結材２は鋼管１００の上端部や鋼管１００外の適所に固定し、そこに固定したときにＮ番目を補強する補強装置１がちょうどＮ番目の補強対象個所に配置される長さに調整しておく。   Further, the connecting member 2 is connected to the reinforcing device 1 that reinforces the Nth, and this connecting member 2 is fixed at the upper end of the steel pipe 100 or at an appropriate place outside the steel pipe 100, and the reinforcement that reinforces the Nth when fixed there. The length is adjusted so that the device 1 is arranged at the location of the Nth reinforcement object.

補強装置１を鋼管１００内に挿入する作業は支保工架設前の適宜のタイミングで行えばよい。例えば、１番目を補強する補強装置１と２番目を補強する補強装置１とを連結材２で連結したら、１番目を補強する補強装置１を鋼管１００内に挿入して下ろしていき、２番目を補強する補強装置１と３番目を補強する補強装置１とを連結材２で連結したら、２番目を補強する補強装置１を鋼管１００内に挿入して下ろしていく、というように連結しながら順次に挿入してもよい。
また、使用するすべて補強装置１を使用するすべての連結材２で連結してから、１番目を補強する補強装置１から順次に鋼管１００内に挿入してもよい。
また、使用するすべて補強装置１を使用するすべての連結材２で連結し、Ｎ番目を補強する補強装置１に連結した連結材２を鋼管１００の上端部や鋼管１００外の適所に固定した後、１番目を補強する補強装置１から順次に鋼管１００内に挿入してもよい。連結材２で正しく連結された補強装置１を現場に持ち込めば、現場作業を格段に効率化できる。 The operation of inserting the reinforcing device 1 into the steel pipe 100 may be performed at an appropriate timing before the support construction. For example, when the reinforcing device 1 that reinforces the first and the reinforcing device 1 that reinforces the second are connected by the connecting material 2, the reinforcing device 1 that reinforces the first is inserted into the steel pipe 100 and lowered. While connecting the reinforcing device 1 that reinforces the reinforcing device 1 that reinforces the third with the connecting material 2, the reinforcing device 1 that reinforces the second is inserted into the steel pipe 100 and lowered. You may insert sequentially.
Alternatively, all the reinforcing devices 1 to be used may be connected by all the connecting members 2 to be used, and then inserted into the steel pipe 100 sequentially from the reinforcing device 1 that reinforces the first.
In addition, after all the reinforcing devices 1 to be used are connected by all the connecting materials 2 and the connecting material 2 connected to the reinforcing device 1 that reinforces the Nth is fixed to an upper end portion of the steel pipe 100 or an appropriate place outside the steel pipe 100. You may insert in the steel pipe 100 sequentially from the reinforcement apparatus 1 which reinforces the 1st. If the reinforcing device 1 correctly connected by the connecting material 2 is brought into the field, the work at the site can be made much more efficient.

以上のように、すべて補強装置１を鋼管１００内に挿入し、Ｎ番目を補強する補強装置１に連結した連結材２を鋼管１００の上端部や鋼管１００外の適所に固定すると、Ｎ番目を補強する補強装置１がちょうどＮ番目の補強対象個所に配置されるとともに、その下に続く１番目から（Ｎ−１）番目の補強装置１もそれぞれ精度良く補強対象個所に配置される。   As described above, when all the reinforcing devices 1 are inserted into the steel pipe 100 and the connecting member 2 connected to the reinforcing device 1 that reinforces the Nth is fixed at the upper end of the steel pipe 100 or at a suitable place outside the steel pipe 100, the Nth is The reinforcing device 1 to be reinforced is arranged at the Nth reinforcement target location, and the 1st to (N-1) th reinforcement devices 1 following the reinforcement device 1 are also accurately arranged at the reinforcement target locations.

すべての補強装置１を補強対象個所に配置したら、各補強装置１をその着脱のための機能を用いて外圧を支持できる状態に設置する。補強装置１の着脱のための機能としては、図２から図４にそれぞれ例示するように、挿入作業時は鋼管１００の内径未満に縮径し、設置時は鋼管１００の内径以上に拡径する機能が好適に用いられる。
すなわち、拡径する機能を利用する場合、すべての補強装置１が補強対象個所に配置されたら、各補強装置１を拡径させて鋼管内面１０２に当接させて設置する。
以上で補強が完了する。
その後、補強が不要となれば、各補強装置１を縮径させて鋼管１００内から順次引き抜き撤去できる。すべての補強装置１が連結材２で連結されているから、すべての補強装置１を引き抜き撤去する作業が迅速かつ容易に行える。 When all the reinforcing devices 1 are arranged at the portions to be reinforced, each reinforcing device 1 is installed in a state where external pressure can be supported by using a function for attaching and detaching the reinforcing devices 1. As a function for attaching and detaching the reinforcing device 1, as illustrated in FIGS. 2 to 4, the diameter of the reinforcing device 1 is reduced to less than the inner diameter of the steel pipe 100 during the insertion operation, and the diameter is increased to be larger than the inner diameter of the steel pipe 100 during installation. The function is preferably used.
That is, when the function of expanding the diameter is used, when all the reinforcing devices 1 are arranged at the reinforcement target portions, the diameter of each reinforcing device 1 is increased and brought into contact with the inner surface 102 of the steel pipe.
This completes the reinforcement.
Thereafter, if reinforcement is not necessary, each reinforcing device 1 can be reduced in diameter and sequentially pulled out from the steel pipe 100 and removed. Since all the reinforcing devices 1 are connected by the connecting material 2, the operation of pulling out and removing all the reinforcing devices 1 can be performed quickly and easily.

次に、補強装置１の具体的構成例につき、図２、図３及び図４を参照して説明する。
まず、図２に示した一構成例である補強装置１Ａにつき説明する。
図２に示すように補強装置１Ａは、中心に配置されるコッタ１０と、コッタ１０を介して対向する２つの支持部１１，１１とを備える。
コッタ１０は、軸方向の位置によって外径が増減する雄テーパー面を有した円錐台状の形状を有する。支持部１１，１１はそれぞれコッタ１０の雄テーパー面にして相補的な雌テーパー面を有しており、コッタ１０の雄テーパー面と支持部１１，１１の雌テーパー面とが接している。２つの支持部１１，１１は、ガイド部１２，１２により連結されている。２つの支持部１１，１１は、ガイド部１２，１２により径方向に沿って相対的に近づいたり離れたりできるようにガイドされている。また、２つの支持部１１，１１は、ガイド部１２，１２に設けられたバネ（不図示）によって互いに近づく方向に付勢されている。
支持部１１，１１は、上下の支持板１３，１３によって挟まれ、軸方向に移動規制され半径方向に移動自由にされている。支持板１３に固定されたフレーム１４を介して複動シリンダー１５が設けられ、複動シリンダー１５の出力軸が継手１６を介してコッタ１０に連結されている。 Next, a specific configuration example of the reinforcing device 1 will be described with reference to FIGS. 2, 3, and 4.
First, the reinforcing device 1A which is an example of the configuration shown in FIG. 2 will be described.
As illustrated in FIG. 2, the reinforcing device 1 </ b> A includes a cotter 10 disposed in the center and two support portions 11 and 11 that are opposed to each other with the cotter 10 interposed therebetween.
The cotter 10 has a truncated cone shape having a male tapered surface whose outer diameter increases or decreases depending on the position in the axial direction. Each of the support portions 11 and 11 has a female taper surface complementary to the male taper surface of the cotter 10, and the male taper surface of the cotter 10 and the female taper surface of the support portions 11 and 11 are in contact with each other. The two support parts 11 and 11 are connected by guide parts 12 and 12. The two support portions 11 and 11 are guided by the guide portions 12 and 12 so as to be relatively close to and away from each other along the radial direction. Moreover, the two support parts 11 and 11 are urged | biased in the direction which mutually approaches by the spring (not shown) provided in the guide parts 12 and 12. FIG.
The support portions 11 and 11 are sandwiched between upper and lower support plates 13 and 13, are restricted in movement in the axial direction, and are free to move in the radial direction. A double-action cylinder 15 is provided via a frame 14 fixed to the support plate 13, and an output shaft of the double-action cylinder 15 is connected to the cotter 10 via a joint 16.

したがって、複動シリンダー１５を動作させることによって、コッタ１０が支持部１１，１１に対して軸方向に移動し、これに伴いコッタ１０の雄テーパー面と支持部１１，１１の雌テーパー面とが摺動して、２つの支持部１１，１１が鋼管軸Ａを中心に集散するよう半径方向に移動する。
以上のように複数の支持部１１，１１を相対的に移動させる移動機構が構成されている。コッタ１０、支持部１１は、金属類のほかコンクリートや、塩ビ等のプラスチックなどで、耐荷部材であればよい。 Therefore, by operating the double acting cylinder 15, the cotter 10 moves in the axial direction with respect to the support portions 11 and 11, and accordingly, the male tapered surface of the cotter 10 and the female tapered surface of the support portions 11 and 11 are moved. By sliding, the two support portions 11 and 11 move in the radial direction so as to converge around the steel pipe axis A.
As described above, the moving mechanism for relatively moving the plurality of support portions 11 is configured. The cotter 10 and the support portion 11 may be made of a load-bearing member made of metal, concrete, plastic such as vinyl chloride, and the like.

支持部１１，１１は、鋼管内面と略等価曲率の支持面１１ａをそれぞれ有している。
図２に示すように、鋼管軸Ａを中心にして支持面１１ａ，１１ａが外向きに配置される。また、支持面１１ａ，１１ａが鋼管軸Ａを中心とした最大径部位とされ、上述した移動機構による最大径部位の径の拡大に伴い支持面１１ａ，１１ａを鋼管内面に当接させて鋼管１００内部に設置可能である。支持面１１ａ，１１ａが最大径部位であるので、鋼管内部の任意の個所に設置可能である。
図２(b)の場合、複動シリンダー１５を縮ませてコッタ１０を引き上げることにより、支持面１１ａ，１１ａが拡径移動し、これにより支持面１１ａ，１１ａを鋼管内面に当接させて補強装置１Ａを鋼管１００内部に設置でき、反対に、複動シリンダー１５を伸ばしてコッタ１０を押し下げることにより、支持面１１ａ，１１ａがバネの力により縮径移動し、これにより補強装置１Ａを取り外し鋼管１００内部から撤去することができる。 The support portions 11 and 11 each have a steel pipe inner surface and a support surface 11a having a substantially equivalent curvature.
As shown in FIG. 2, the support surfaces 11 a and 11 a are arranged outward with the steel pipe axis A as the center. Further, the support surfaces 11a and 11a are the maximum diameter portions centered on the steel pipe axis A, and the steel pipe 100 is brought into contact with the inner surface of the steel pipe as the diameter of the maximum diameter portion is increased by the moving mechanism described above. Can be installed inside. Since the support surfaces 11a and 11a are the maximum diameter portions, they can be installed at any location inside the steel pipe.
In the case of FIG. 2 (b), the double acting cylinder 15 is contracted and the cotter 10 is pulled up, whereby the support surfaces 11a and 11a are expanded in diameter, and thereby the support surfaces 11a and 11a are brought into contact with the inner surface of the steel pipe to be reinforced. The apparatus 1A can be installed inside the steel pipe 100, and conversely, by extending the double-acting cylinder 15 and pushing down the cotter 10, the support surfaces 11a and 11a are reduced in diameter by the force of the spring, thereby removing the reinforcing apparatus 1A and the steel pipe 100 can be removed from the inside.

図２に示すように、局部荷重作用点に相当する鋼管内面１０２に支持面１１ａ（好ましくは支持面１１ａの周方向中心）が当接する設置状態を確実に実現できることが好ましい。
そのためには、支持面１１ａの中心角θ（図２(a)参照）は大きいほうが良い。中心角θを大きくするためには、支持部１１は少ない方が良いため、本例のように最少の２つとすることが好ましい。そして、中心角θとして９０度以上を確保するように支持部１１を形成する。こうしたことで支保工が架設される側に対面する鋼管側面には、支持部材を介して反力が作用するが、支持部材に触れない部分の力の成分は法線方向に対して接線方向が卓越するため鋼管の変形を抑止できる。
またこの場合、±４５度以上の設置誤差が許容されるが、設置誤差が大きくならないようにするために、連結材２を接続する連結部１７（図２(b)参照）を上下各２個所に設け、図１に示したように２本の並列な連結材２，２で補強装置１，１間を連結することが好ましい。これにより、鋼管１００内へ挿入時における補強装置１の回転を抑え、支持面１１ａが局部荷重作用点に相当する鋼管内面１０２から外れることを防ぐことができる。複動シリンダー１５に替えてネジジャッキなど往復動可能なものとしてもよい。 As shown in FIG. 2, it is preferable that the installation state in which the support surface 11a (preferably the center in the circumferential direction of the support surface 11a) is in contact with the steel pipe inner surface 102 corresponding to the local load acting point can be reliably realized.
For that purpose, it is better that the central angle θ (see FIG. 2A) of the support surface 11a is larger. In order to increase the central angle θ, it is preferable that the number of support portions 11 is small, and therefore, it is preferable to use the minimum two as in this example. And the support part 11 is formed so that 90 degree | times or more may be ensured as center angle (theta). As a result, a reaction force acts on the side surface of the steel pipe facing the side where the support work is erected via the support member, but the component of the force that does not touch the support member is tangential to the normal direction. Because it excels, deformation of the steel pipe can be suppressed.
Further, in this case, an installation error of ± 45 degrees or more is allowed, but in order to prevent the installation error from increasing, two connecting portions 17 (see FIG. 2 (b)) for connecting the connecting material 2 are provided at two locations on the upper and lower sides. It is preferable to connect the reinforcing devices 1 and 1 with two parallel connecting members 2 and 2 as shown in FIG. Thereby, rotation of the reinforcement apparatus 1 at the time of insertion in the steel pipe 100 can be suppressed, and it can prevent that the support surface 11a remove | deviates from the steel pipe inner surface 102 corresponded to a local load action point. The double-acting cylinder 15 may be replaced with a screw jack or the like that can reciprocate.

次に、図３に示した一構成例である補強装置１Ｂにつき説明する。なお、図２に示した補強装置１Ａと対応する要素は同符号を付し説明を省略する。
本例の補強装置１Ｂは、モーターとネジ機構によって支持部１１，１１の半径方向への移動機構を実現するものである。
例えば図３に示すとおり、モーター２０と、かさ歯車２１，２２，２２と、支持部１１，１１とをフレーム２４に支持し、かさ歯車２２，２２の軸２３に形成された雄ネジ２３ａを、支持部１１に形成された雌ネジ１１ｂに螺合連結し、モーター２０の回転動力を、かさ歯車２１，２２，２２を介して雄ネジ２３ａまで伝達することで、支持部１１，１１の半径方向への移動機構を実現できる。支持部１１，１１はフレーム２４に対し半径方向にのみ可動にして支持される。 Next, the reinforcing device 1B which is an example of the configuration shown in FIG. 3 will be described. Elements corresponding to those of the reinforcing device 1A shown in FIG.
The reinforcing device 1B of this example realizes a moving mechanism in the radial direction of the support portions 11 and 11 by a motor and a screw mechanism.
For example, as shown in FIG. 3, the motor 20, the bevel gears 21, 22, 22 and the support portions 11, 11 are supported by the frame 24, and the male screw 23 a formed on the shaft 23 of the bevel gears 22, 22 is By screwing and coupling to a female screw 11b formed on the support portion 11, the rotational power of the motor 20 is transmitted to the male screw 23a via the bevel gears 21, 22, and 22 so that the radial direction of the support portions 11 and 11 is reached. A moving mechanism can be realized. The support portions 11 and 11 are supported by being movable in the radial direction only with respect to the frame 24.

次に、図４に示した一構成例である補強装置１Ｃにつき説明する。なお、図２に示した補強装置１Ａと対応する要素は同符号を付し説明を省略する。
本例の補強装置１Ｃは、複動シリンダーとリンク機構によって支持部１１，１１の半径方向への移動機構を実現するものである。
例えば図４に示すとおり、複動シリンダー３０の両端に連結されたヒンジベース３１，３１をそれぞれ経由するように２つの支持部１１，１１を４つのリンク３２，３２，３２，３２を介して連結し、複動シリンダー３０を伸縮させることで、支持部１１，１１の半径方向への移動機構を実現できる。
なお、リンク３２，３２，３２，３２とブラケット３３，３３を排して、複動シリンダー３０の軸方向を一方の支持部１１から他方の支持部１１に至る方向に配置し、２つの支持部１１，１１を直接的に複動シリンダー３０で連結した構成を実施してもよい。いわば、一方のヒンジベース３１が一方の支持部１１に固定され、他方のヒンジベース３１が他方の支持部１１に固定されたような構成である。 Next, a description will be given of the reinforcing device 1C as an example of the configuration shown in FIG. Elements corresponding to those of the reinforcing device 1A shown in FIG.
The reinforcing device 1C of this example realizes a moving mechanism in the radial direction of the support portions 11 and 11 by a double acting cylinder and a link mechanism.
For example, as shown in FIG. 4, two support portions 11 and 11 are connected via four links 32, 32, 32, 32 so as to pass through hinge bases 31, 31 connected to both ends of the double-acting cylinder 30. And the moving mechanism to the radial direction of the support parts 11 and 11 is realizable by expanding / contracting the double acting cylinder 30. FIG.
The links 32, 32, 32, 32 and the brackets 33, 33 are removed, and the axial direction of the double-acting cylinder 30 is arranged in a direction from one support part 11 to the other support part 11, and two support parts 11 and 11 may be directly connected by the double-acting cylinder 30. In other words, one hinge base 31 is fixed to one support portion 11 and the other hinge base 31 is fixed to the other support portion 11.

以上説明した補強装置１Ａ，１Ｂ，１Ｃは、動力装置（１５，２０，３０）と、その動力を支持部１１，１１に伝達する機構とを個々に備えるものである。
各動力装置（１５，２０，３０）と接続されたコントローラーを鋼管１００の外部に設置しておき、必要数の補強装置１を鋼管１００内に配置した後、コントローラーを操作して支持部１１の拡径動作を実行させることで、補強装置１を鋼管１００の内部に設置する。その際、コントローラーを操作して全補強装置１の支持部１１の拡径動作を一斉に実行させることで、必要数の補強装置１を鋼管１００の内部に短時間で設置することができる。
設置後、コントローラーを操作して支持部１１の縮径動作を実行させれば、鋼管１００内から補強装置１を引き抜き撤去することができる。その際、コントローラーを操作して全補強装置１の支持部１１の縮径動作を一斉に実行させれば、鋼管１００内から補強装置１を引き抜き撤去するための準備を短時間に行える。
動力装置（１５，２０，３０）のエネルギー形態は、電気、油圧、空圧などを挙げることができるが、特に限定されるものではない。
なお、補強装置１は、支持面１１ａの曲率を変えることで、各径の鋼管の補強に適用することができる。 The reinforcing devices 1A, 1B, and 1C described above are each provided with a power device (15, 20, 30) and a mechanism that transmits the power to the support portions 11 and 11.
The controller connected to each power unit (15, 20, 30) is installed outside the steel pipe 100, and after the necessary number of reinforcing devices 1 are arranged in the steel pipe 100, the controller is operated to operate the support 11 The reinforcement device 1 is installed inside the steel pipe 100 by executing the diameter expansion operation. At that time, by operating the controller to increase the diameter of the support portions 11 of all the reinforcing devices 1 at the same time, the required number of reinforcing devices 1 can be installed inside the steel pipe 100 in a short time.
After the installation, if the controller is operated to reduce the diameter of the support portion 11, the reinforcing device 1 can be pulled out from the steel pipe 100 and removed. At that time, if the controller is operated to reduce the diameters of the support portions 11 of all the reinforcing devices 1 at the same time, preparation for pulling out and removing the reinforcing device 1 from the steel pipe 100 can be performed in a short time.
Although the energy form of a power unit (15, 20, 30) can mention electricity, oil pressure, air pressure, etc., it is not specifically limited.
In addition, the reinforcement apparatus 1 can be applied to the reinforcement of the steel pipe of each diameter by changing the curvature of the support surface 11a.

１（１Ａ，１Ｂ，１Ｃ） 補強装置
１１ 支持部
１１ａ 支持面
２ 連結材
１００ 鋼管
２００ 支保工 1 (1A, 1B, 1C) Reinforcing device 11 Support part 11a Support surface 2 Connecting material 100 Steel pipe 200 Supporting work

Claims (6)

側面に支保工が架設され当該側面に当該支保工から局部荷重を受ける鋼管の、当該支保工からの局部荷重作用点に相当する鋼管内面を支持して当該局部荷重に対する構造強度を補強する補強装置を鋼管の内部に着脱自在に設置する鋼管の補強方法であって、
前記補強装置として、鋼管内面と略等価曲率の支持面をそれぞれ有し、鋼管軸を中心にして前記支持面が外向きに配置される複数の支持部と、前記複数の支持部が鋼管軸を中心に集散するよう半径方向に前記複数の支持部を相対的に移動させる移動機構と、を備え、前記支持面が鋼管軸を中心とした最大径部位とされ、前記移動機構による前記最大径部位の径の拡大に伴い前記支持面を鋼管内面に当接させて鋼管内部に設置可能にされたものを用い、
前記支持面を、前記局部荷重作用点に相当する鋼管内面に当接させて、前記補強装置を鋼管内部に設置する鋼管の補強方法。 Reinforcing device that supports a steel pipe inner surface corresponding to the local load acting point of the steel pipe that receives a local load from the support work by supporting a support work on the side face and reinforces the structural strength against the local load. Is a method of reinforcing a steel pipe that is detachably installed inside the steel pipe ,
The reinforcing device has a steel pipe inner surface and a support surface having a substantially equivalent curvature, respectively, and a plurality of support portions in which the support surface is arranged outwardly about the steel pipe shaft, and the plurality of support portions have a steel pipe shaft. A moving mechanism that relatively moves the plurality of support portions in the radial direction so as to converge in the center, and the support surface is a maximum diameter portion centered on a steel pipe shaft, and the maximum diameter portion by the moving mechanism With the expansion of the diameter of the steel pipe, the support surface is brought into contact with the inner surface of the steel pipe and can be installed inside the steel pipe.
A method for reinforcing a steel pipe, wherein the support device is brought into contact with an inner surface of a steel pipe corresponding to the local load acting point, and the reinforcing device is installed inside the steel pipe. 前記支持面を、前記局部荷重作用点に相当する鋼管内面に当接させて、前記補強装置を鋼管内部に設置した後、
前記移動機構により前記最大径部位の径を縮小させて前記補強装置を前記鋼管内から撤去する請求項１に記載の鋼管の補強方法。 After the support surface is brought into contact with the inner surface of the steel pipe corresponding to the local load acting point, and the reinforcing device is installed inside the steel pipe,
The steel pipe reinforcing method according to claim 1, wherein the diameter of the maximum diameter portion is reduced by the moving mechanism and the reinforcing device is removed from the steel pipe. 側面に局部荷重を受ける鋼管の、当該局部荷重作用点に相当する鋼管内面を支持して当該局部荷重に対する構造強度を補強する補強装置であって、
鋼管内面と略等価曲率の支持面をそれぞれ有し、鋼管軸を中心にして前記支持面が外向きに配置される複数の支持部と、
前記複数の支持部が鋼管軸を中心に集散するよう半径方向に前記複数の支持部を相対的に移動させる移動機構と、
を備え、
前記支持面が鋼管軸を中心とした最大径部位とされ、前記移動機構による前記最大径部位の径の拡大に伴い前記支持面を鋼管内面に当接させて鋼管内部に設置可能にされ、
前記移動機構は、動力装置と、前記動力装置の動力を前記複数の支持部に伝達する伝達機構とによって前記複数の支持部を、鋼管軸を中心とした半径方向に移動させる機構であり、
前記動力装置の出力軸が鋼管軸上に配置される鋼管の補強装置。 A steel pipe that receives a local load on a side surface, a reinforcing device that supports a steel pipe inner surface corresponding to the local load acting point and reinforces the structural strength against the local load,
A plurality of support portions each having a support surface having a substantially equivalent curvature and a steel pipe inner surface, the support surfaces being arranged outwardly about the steel pipe axis;
A moving mechanism that relatively moves the plurality of support portions in a radial direction so that the plurality of support portions converge around a steel pipe axis;
With
The support surface is a maximum diameter portion centered on a steel pipe shaft, and the support surface is brought into contact with the inner surface of the steel pipe as the diameter of the maximum diameter portion is increased by the moving mechanism, and can be installed inside the steel pipe .
The moving mechanism is a mechanism that moves the plurality of support portions in a radial direction around a steel pipe shaft by a power device and a transmission mechanism that transmits power of the power device to the plurality of support portions.
A steel pipe reinforcing device in which an output shaft of the power unit is disposed on a steel pipe shaft . 側面に局部荷重を受ける鋼管の、当該局部荷重作用点に相当する鋼管内面を支持して当該局部荷重に対する構造強度を補強する補強装置であって、
鋼管内面と略等価曲率の支持面をそれぞれ有し、鋼管軸を中心にして前記支持面が外向きに配置される複数の支持部と、
前記複数の支持部が鋼管軸を中心に集散するよう半径方向に前記複数の支持部を相対的に移動させる移動機構と、
を備え、
前記支持面が鋼管軸を中心とした最大径部位とされ、前記移動機構による前記最大径部位の径の拡大に伴い前記支持面を鋼管内面に当接させて鋼管内部に設置可能にされ、
前記移動機構は、複動シリンダーと、前記複動シリンダーの動力を前記複数の支持部に伝達するコッタとによって前記複数の支持部を、鋼管軸を中心とした半径方向に移動させる機構であり、
前記複動シリンダーの出力軸が鋼管軸上に配置される鋼管の補強装置。 A steel pipe that receives a local load on a side surface, a reinforcing device that supports a steel pipe inner surface corresponding to the local load acting point and reinforces the structural strength against the local load,
A plurality of support portions each having a support surface having a substantially equivalent curvature and a steel pipe inner surface, the support surfaces being arranged outwardly about the steel pipe axis;
A moving mechanism that relatively moves the plurality of support portions in a radial direction so that the plurality of support portions converge around a steel pipe axis;
With
The support surface is a maximum diameter portion centered on a steel pipe shaft, and the support surface is brought into contact with the inner surface of the steel pipe as the diameter of the maximum diameter portion is increased by the moving mechanism, and can be installed inside the steel pipe .
The moving mechanism is a mechanism that moves the plurality of support portions in a radial direction around a steel pipe axis by a double-action cylinder and a cotter that transmits the power of the double-action cylinder to the plurality of support portions.
A steel pipe reinforcing device in which an output shaft of the double-acting cylinder is disposed on a steel pipe shaft . 側面に局部荷重を受ける鋼管の、当該局部荷重作用点に相当する鋼管内面を支持して当該局部荷重に対する構造強度を補強する補強装置であって、
鋼管内面と略等価曲率の支持面をそれぞれ有し、鋼管軸を中心にして前記支持面が外向きに配置される複数の支持部と、
前記複数の支持部が鋼管軸を中心に集散するよう半径方向に前記複数の支持部を相対的に移動させる移動機構と、
を備え、
前記支持面が鋼管軸を中心とした最大径部位とされ、前記移動機構による前記最大径部位の径の拡大に伴い前記支持面を鋼管内面に当接させて鋼管内部に設置可能にされ、
前記移動機構は、モーターと、前記モーターの動力を前記複数の支持部に伝達するネジ及び歯車機構とによって前記複数の支持部を、鋼管軸を中心とした半径方向に移動させる機構であり、
前記モーターの出力軸が鋼管軸上に配置される鋼管の補強装置。 A steel pipe that receives a local load on a side surface, a reinforcing device that supports a steel pipe inner surface corresponding to the local load acting point and reinforces the structural strength against the local load,
A plurality of support portions each having a support surface having a substantially equivalent curvature and a steel pipe inner surface, the support surfaces being arranged outwardly about the steel pipe axis;
A moving mechanism that relatively moves the plurality of support portions in a radial direction so that the plurality of support portions converge around a steel pipe axis;
With
The support surface is a maximum diameter portion centered on a steel pipe shaft, and the support surface is brought into contact with the inner surface of the steel pipe as the diameter of the maximum diameter portion is increased by the moving mechanism, and can be installed inside the steel pipe .
The moving mechanism is a mechanism that moves the plurality of support portions in a radial direction around a steel pipe axis by a motor and a screw and gear mechanism that transmits power of the motor to the plurality of support portions.
A steel pipe reinforcing device in which an output shaft of the motor is disposed on a steel pipe shaft . 側面に局部荷重を受ける鋼管の、当該局部荷重作用点に相当する鋼管内面を支持して当該局部荷重に対する構造強度を補強する補強装置であって、
鋼管内面と略等価曲率の支持面をそれぞれ有し、鋼管軸を中心にして前記支持面が外向きに配置される複数の支持部と、
前記複数の支持部が鋼管軸を中心に集散するよう半径方向に前記複数の支持部を相対的に移動させる移動機構と、
を備え、
前記支持面が鋼管軸を中心とした最大径部位とされ、前記移動機構による前記最大径部位の径の拡大に伴い前記支持面を鋼管内面に当接させて鋼管内部に設置可能にされ、
前記移動機構は、複動シリンダーと、前記複動シリンダーの動力を前記複数の支持部に伝達するリンク機構とによって前記複数の支持部を、鋼管軸を中心とした半径方向に移動させる機構であり、
前記複動シリンダーの出力軸が鋼管軸上に配置される鋼管の補強装置。 A steel pipe that receives a local load on a side surface, a reinforcing device that supports a steel pipe inner surface corresponding to the local load acting point and reinforces the structural strength against the local load,
A plurality of support portions each having a support surface having a substantially equivalent curvature and a steel pipe inner surface, the support surfaces being arranged outwardly about the steel pipe axis;
A moving mechanism that relatively moves the plurality of support portions in a radial direction so that the plurality of support portions converge around a steel pipe axis;
With
The support surface is a maximum diameter portion centered on a steel pipe shaft, and the support surface is brought into contact with the inner surface of the steel pipe as the diameter of the maximum diameter portion is increased by the moving mechanism, and can be installed inside the steel pipe .
The moving mechanism is a mechanism that moves the plurality of support portions in a radial direction around a steel pipe axis by a double-action cylinder and a link mechanism that transmits power of the double-action cylinder to the plurality of support portions. ,
A steel pipe reinforcing device in which an output shaft of the double-acting cylinder is disposed on a steel pipe shaft .
JP2013210913A 2013-10-08 2013-10-08 Steel pipe reinforcing method and reinforcing device Active JP6271207B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013210913A JP6271207B2 (en) 2013-10-08 2013-10-08 Steel pipe reinforcing method and reinforcing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013210913A JP6271207B2 (en) 2013-10-08 2013-10-08 Steel pipe reinforcing method and reinforcing device

Publications (2)

Publication Number Publication Date
JP2015074902A JP2015074902A (en) 2015-04-20
JP6271207B2 true JP6271207B2 (en) 2018-01-31

Family

ID=52999992

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013210913A Active JP6271207B2 (en) 2013-10-08 2013-10-08 Steel pipe reinforcing method and reinforcing device

Country Status (1)

Country Link
JP (1) JP6271207B2 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5781529A (en) * 1979-11-15 1982-05-21 Yoshiji Kondo Method and apparatus for holding hollow pile
JPH06257150A (en) * 1993-03-09 1994-09-13 Chiyouwa Kogyo Kk Core body for steel pipe pile or the like
JP2641137B2 (en) * 1995-05-01 1997-08-13 株式会社技研製作所 Pressing device for cylindrical structure and method of driving cylindrical structure
US6047505A (en) * 1997-12-01 2000-04-11 Willow; Robert E. Expandable base bearing pile and method of bearing pile installation
JP4194738B2 (en) * 2000-06-08 2008-12-10 株式会社クボタ Falling object prevention pile
JP5655738B2 (en) * 2010-12-06 2015-01-21 新日鐵住金株式会社 Reinforced structure of square steel pipe column
JP5823715B2 (en) * 2011-03-30 2015-11-25 株式会社技研製作所 Pile inner surface support device and punching method

Also Published As

Publication number Publication date
JP2015074902A (en) 2015-04-20

Similar Documents

Publication Publication Date Title
JP5871367B2 (en) Drilling rig
JP6042172B2 (en) Pile holding relay device and pile construction method
JP2015175226A (en) Strut device and earth-retaining timbering
JP2011106190A (en) Liner plate connection structure and liner plate connection structural body
JP2008045728A (en) Timbering device and pipeline construction method using the same
CN102756019A (en) Device for roundness adjustment and supporting of penstock
US20140030029A1 (en) Tapered Pipe System and Method for Foundation Support
JP4326908B2 (en) Retaining wall and method for constructing retaining wall
JP6271207B2 (en) Steel pipe reinforcing method and reinforcing device
JP6899571B1 (en) Abdominal upright correction jig and mountain retaining wall construction method
JP2013108302A (en) Inclination angle adjustment device and inclination angle adjustment method of steel tower main column material
JP2009257070A (en) Liner plate and deep foundation construction method
JP2004332202A (en) Method for constructing shaft by using liner plate
JP4976999B2 (en) Sheet pile-type support method for cut groove
JP6178030B1 (en) Prior construction method for earth retaining of excavation groove and supporting device used for the construction method
JP2019183632A (en) Rehabilitation pipe levitation prevention device
CN113684829B (en) Pile pulling method and pile pulling machine in limited space
JP2007231522A (en) Bendable and joinable sheet panel, and tunnel reinforcing method
JP4014050B2 (en) Steel pipe temporary facility construction method
JP5062571B2 (en) Synthetic frame and tunnel construction method using square steel pipe
JP6295029B2 (en) Pile embedding method
JP6854699B2 (en) Joint structure and pile body of pile constituent members, joint method of pile constituent members and manufacturing method of pile body
KR101163723B1 (en) Device for combination hume pipe and methode construction there of
JP2015101836A (en) Steel pipe sheet pile foundation method
JP7229634B2 (en) Support jig for work scaffold in shaft, support jig unit, work scaffold in shaft, and method for constructing work scaffold in shaft

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20160914

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20170713

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20170919

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20171120

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20171205

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20171227

R150 Certificate of patent or registration of utility model

Ref document number: 6271207

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250