JP5014520B1 - Existing steel pipe column reinforcement and its construction method - Google Patents
Existing steel pipe column reinforcement and its construction method Download PDFInfo
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Abstract
【課題】既設鋼管柱の腐食部近傍の外部及び内部を補強できて強度が高まり、施工しやすい既設鋼管柱補強材を提供すること。
【解決手段】既設鋼管柱の腐食部近傍の外周囲を取り巻き、既設鋼管柱との間にモルタル充填空間が形成される補強管２と、既設鋼管柱の腐食部近傍の内部に上下方向に沿って挿入され、周方向に２分割された一対の半割り管３と、既設鋼管柱と同径で、一対の半割り管３の周囲に嵌合されたリング４とを備え、補強管２は周方向に連続した筒体より成り、補強管２に複数のネジ孔８が周方向に適宜間隔をおいて穿設されると共に、これらネジ孔８に芯出しネジ９がそれぞれ外側から内側に向けて螺合され、半割り管３はリング４に接離可能に取り付けられ、半割り管３の外径は既設鋼管柱及びリング４の内径より小さく形成されている。
【選択図】図２An object of the present invention is to provide an existing steel pipe column stiffener which can reinforce the outside and the inside of the vicinity of a corroded portion of an existing steel pipe column and has high strength and is easy to construct.
SOLUTION: A reinforcing pipe 2 that surrounds an outer periphery in the vicinity of a corroded portion of an existing steel pipe column, and a mortar filling space is formed between the existing steel pipe column, and an interior in the vicinity of the corroded portion of the existing steel pipe column along the vertical direction. The pair of half pipes 3 inserted in the circumferential direction and divided into two in the circumferential direction, and a ring 4 having the same diameter as the existing steel pipe column and fitted around the pair of half pipes 3, It consists of a cylindrical body continuous in the circumferential direction, and a plurality of screw holes 8 are formed in the reinforcing tube 2 at appropriate intervals in the circumferential direction, and centering screws 9 are respectively directed to the screw holes 8 from the outside to the inside. The half pipe 3 is detachably attached to the ring 4, and the outer diameter of the half pipe 3 is smaller than the inner diameter of the existing steel pipe column and the ring 4.
[Selection] Figure 2
Description
本発明は、道路標識、道路反射鏡等に用いられる既設鋼管柱の腐食部分を補強すると共に、腐食の進行を防ぐ既設鋼管柱補強材及びその施工方法に関する。 The present invention relates to an existing steel pipe column reinforcing material that reinforces a corroded portion of an existing steel pipe column used for road signs, road reflectors, and the like, and a construction method thereof.
道路標識、道路反射鏡等に用いられる鋼管柱は、長期間風雨に曝されると、腐食して一部が破損したり強度が低下することも多い。特に、鋼管柱の地表部近傍は、湿気や溜まった雨水等により腐食しやすく、腐食部分を放置すると強風等によって鋼管柱が倒れる心配もある。
このような事態に対応するため、従来、既設鋼管柱の地表部近傍に発生した腐食部を補強する技術が種々提案されている。
Steel pipe columns used for road signs, road reflectors, and the like are often corroded and partially damaged or reduced in strength when exposed to wind and rain for a long time. In particular, the vicinity of the surface portion of the steel pipe column is easily corroded by moisture, accumulated rainwater, and the like, and if the corroded portion is left, there is a concern that the steel pipe column may fall down due to strong winds or the like.
In order to cope with such a situation, conventionally, various techniques for reinforcing a corroded portion generated near the surface portion of an existing steel pipe column have been proposed.
例えば、特許文献１には、既設鋼管柱の地表部近傍を取り巻く腐食防止補強材と、腐食防止補強材の内面に取り付けられた複数のコの字型受け材と、ウェブ部がコの字型受け材の溝部に差し込まれ、フランジ部が既設鋼管柱に対向する複数のＴ字型補強材と、既設鋼管柱と腐食防止剤の間隙に充填される補強モルタルとを備えた既設鋼管柱腐食防止補強材が記載されている。
しかし、この既設鋼管柱腐食防止補強材は、既設鋼管柱の内部を補強する手段を備えていないため十分な強度を得にくく、既設鋼管柱の内部空間から進行する腐食を防ぐのが困難である。
また、腐食防止補強材を既設鋼管柱と同心状に固定するのが難しいという問題もある。
For example, Patent Document 1 discloses a corrosion prevention reinforcing material surrounding the vicinity of the surface portion of an existing steel pipe column, a plurality of U-shaped receiving materials attached to the inner surface of the corrosion prevention reinforcing material, and a web portion having a U shape. Corrosion prevention of existing steel pipe columns provided with a plurality of T-shaped reinforcing members that are inserted into the grooves of the receiving material and whose flange faces the existing steel pipe columns, and reinforcing mortar filled in the gap between the existing steel pipe columns and the corrosion inhibitor Reinforcing materials are described.
However, since this existing steel pipe column corrosion prevention reinforcing material does not have means for reinforcing the inside of the existing steel pipe column, it is difficult to obtain sufficient strength, and it is difficult to prevent corrosion that proceeds from the internal space of the existing steel pipe column. .
There is also a problem that it is difficult to fix the corrosion prevention reinforcing material concentrically with the existing steel pipe column.
本発明が解決しようとする課題は、既設鋼管柱の腐食部近傍の外部及び内部を補強できて強度が高まり、施工しやすい既設鋼管柱補強材及びその施工方法を提供することにある。 The problem to be solved by the present invention is to provide an existing steel pipe column reinforcing material which can reinforce the outside and the inside of the corroded portion of the existing steel pipe column and increase the strength and is easy to construct, and a construction method therefor.
本発明の既設鋼管柱補強材は、既設鋼管柱の腐食部近傍の外周囲を取り巻き、前記既設鋼管柱との間にモルタル充填空間が形成される補強管と、前記既設鋼管柱の腐食部近傍の内部に上下方向に沿って挿入され、周方向に２分割された一対の半割り管と、前記既設鋼管柱と同径で、前記一対の半割り管の周囲に嵌合されたリングとを備え、前記補強管は周方向に連続した筒体より成り、前記補強管に複数のネジ孔が周方向に適宜間隔をおいて穿設されると共に、これらネジ孔に芯出しネジがそれぞれ外側から内側に向けて螺合され、前記半割り管は前記リングに接離可能に取り付けられ、前記半割り管の外径は前記既設鋼管柱及びリングの内径より小さく形成されている。 The existing steel pipe column stiffener of the present invention surrounds the outer periphery in the vicinity of the corroded portion of the existing steel pipe column, and a reinforcing pipe in which a mortar filling space is formed between the existing steel pipe column and the corroded portion of the existing steel pipe column. A pair of half pipes inserted in the vertical direction and divided into two in the circumferential direction, and a ring having the same diameter as the existing steel pipe column and fitted around the pair of half pipes The reinforcing pipe is formed of a cylindrical body that is continuous in the circumferential direction, and a plurality of screw holes are formed in the reinforcing pipe at appropriate intervals in the circumferential direction, and centering screws are respectively inserted into the screw holes from the outside. The half pipe is screwed inwardly, and the half pipe is attached to the ring so as to be able to contact and separate, and the outer diameter of the half pipe is formed smaller than the inner diameter of the existing steel pipe column and the ring.
前記補強管の内面に上下方向に沿う複数の外部補強リブを溶接すると良い。
前記半割り管の内面に上下方向に沿う内部補強リブをそれぞれ溶接してもよい。
前記半割り管の内面にそれぞれナットを固定し、前記リング及び半割り管を貫通したボルトの先端部を前記ナットに螺合したことにより、前記半割り管が前記リングに接離可能に取り付けられることがある。
A plurality of external reinforcing ribs along the vertical direction may be welded to the inner surface of the reinforcing pipe.
You may weld the internal reinforcement rib which follows an up-down direction to the inner surface of the said half pipe.
The nut is fixed to the inner surface of the half pipe, and the tip of a bolt penetrating the ring and the half pipe is screwed to the nut, so that the half pipe is attached to and separated from the ring. Sometimes.
本発明の既設鋼管柱補強材の施工方法は、既設鋼管柱の腐食部を切除してから、前記既設鋼管柱において切除した部分よりも下方の下部鋼管柱の内側下部に半割り管支持モルタルを充填した後、前記下部鋼管柱の内部に前記半割り管の下部を挿入すると共に、前記リングの下端面を前記下部鋼管柱の上端面に当接し、次に、一対の半割り管の内側に内部モルタルを充填し、前記下部鋼管柱の外周囲に上方から前記補強管を被せ、該補強管を前記芯出しネジによって前記下部鋼管柱に仮固定し、次いで、前記既設鋼管柱において切除した部分よりも上方の上部鋼管柱を前記補強管の内部に挿入して、その下端面を前記リングの上端面に当接し、さらに、前記補強管を上方に移動させて、前記芯出しネジによって前記上部鋼管柱に仮固定してから、前記内部モルタルが硬化する前に、前記半割り管をぞれぞれ前記リングに接近させて一対の半割り管の隙間を広げ、該隙間を通して前記内部モルタルを前記上部鋼管柱と半割り管との間に流入させ、その後、前記補強管を下方に移動させてから、前記補強管の外側に露出する芯出しネジの長さが全て同じくなるよう調節することにより、前記補強管の中心を前記既設鋼管柱の中心に合わせると共に、前記補強管を前記既設鋼管柱に固定し、次いで、前記モルタル充填空間にモルタルを充填する。 The construction method of the existing steel pipe column reinforcing material according to the present invention is to cut the corroded portion of the existing steel pipe column, and then divide the half pipe support mortar at the inner lower part of the lower steel pipe column below the cut part of the existing steel pipe column. After filling, the lower part of the half pipe is inserted into the lower steel pipe column, the lower end surface of the ring is brought into contact with the upper end surface of the lower steel pipe column, and then inside the pair of half pipes Filled with internal mortar, covers the reinforcing pipe from above on the outer periphery of the lower steel pipe column, temporarily fixes the reinforcing pipe to the lower steel pipe column with the centering screw, and then cuts off the existing steel pipe column An upper steel pipe column above is inserted into the inside of the reinforcing pipe, a lower end surface thereof is brought into contact with an upper end face of the ring, and the reinforcing pipe is moved upward, and the upper part is moved by the centering screw. After temporarily fixing to the steel pipe column Before the internal mortar hardens, each of the half pipes approaches the ring to widen the gap between the pair of half pipes, and through the gap, the internal mortar is connected to the upper steel pipe column and the half pipe. The center of the reinforcing tube is adjusted by adjusting the lengths of the centering screws exposed to the outside of the reinforcing tube after the reinforcing tube is moved downward. While aligning with the center of the existing steel pipe column, the reinforcing pipe is fixed to the existing steel pipe column, and then the mortar filling space is filled with mortar.
請求項１に係る発明によれば、既設鋼管柱の腐食部近傍の外部及び内部を補強するので、腐食による既設鋼管柱の強度の低下を十分に補って倒壊等の危険性を確実に防止でき、既設鋼管柱の耐久性を高めて柱交換に要するコストを低減できる。
また、腐食部分を除去しても、上下に分割された既設鋼管柱は、リング、補強管及び半割り管から成る三重構造によって接合されるため、高い強度が得られる。
さらに、補強管と既設鋼管柱とがモルタルで接合される前であっても、芯出しネジで仮固定しておくことができるため現場での作業性が高まり、しかも、芯出しネジを進退させるだけで簡単に補強管を既設鋼管柱と同心状に設置することができ、この結果、モルタル充填空間の厚みが均一化されるので強度のバラツキが発生し難く、補強後の外観にも違和感が生じにくい。
また、一対の半割り管を既設鋼管柱の補強部分に挿入して、その内部にモルタルを充填しておき、半割り管をリング内面に接近させると、一対の半割り管間の隙間が広がってモルタルが既設鋼管柱の補強部分内に流入し、既設鋼管柱の内部を強固に補強することができる。
According to the invention according to claim 1, since the outside and the inside in the vicinity of the corroded portion of the existing steel pipe column are reinforced, it is possible to reliably prevent the risk of collapse or the like by sufficiently compensating for the decrease in strength of the existing steel pipe column due to corrosion. The durability of existing steel pipe columns can be increased and the cost required for column replacement can be reduced.
Further, even if the corroded portion is removed, the existing steel pipe columns divided vertically are joined by a triple structure including a ring, a reinforcing pipe, and a half pipe, so that high strength can be obtained.
Furthermore, even before the reinforcement pipe and the existing steel pipe column are joined with mortar, the work can be temporarily fixed with a centering screw, so that the workability at the site is improved, and the centering screw is advanced and retracted. It is easy to install the reinforcing pipe concentrically with the existing steel pipe column, and as a result, the thickness of the mortar filling space is made uniform, so that the strength does not vary and the appearance after reinforcement is uncomfortable. Hard to occur.
In addition, when a pair of half pipes are inserted into the reinforcing part of an existing steel pipe column and filled with mortar, and the half pipe is brought close to the inner surface of the ring, the gap between the pair of half pipes widens. Thus, the mortar flows into the reinforcing portion of the existing steel pipe column, and the inside of the existing steel pipe column can be firmly reinforced.
請求項２に係る発明によれば、補強管の強度が高まると共に、モルタル充填空間に充填したモルタルと補強管との定着性が良く、しかも、現場で外部補強リブをモルタル充填空間に配置する手間を省ける。
請求項３に係る発明によれば、半割り管の強度が高まり、現場で内部補強リブを半割り管の内面に取り付ける必要が無いので、現場での作業が簡略化される。
請求項４に係る発明によれば、半割り管が外部に露出していない状態であっても、リング外側からの操作によって簡単に半割り管をリングに接近させ、一対の半割り管間の隙間を広げることができる。
According to the second aspect of the invention, the strength of the reinforcing pipe is increased, the fixing property between the mortar filled in the mortar filling space and the reinforcing pipe is good, and the trouble of disposing the external reinforcing rib in the mortar filling space on site. Can be omitted.
According to the invention which concerns on Claim 3, since the intensity | strength of a half pipe increases and it is not necessary to attach an internal reinforcement rib to the inner surface of a half pipe on the spot, the work on the spot is simplified.
According to the invention of claim 4, even when the half pipe is not exposed to the outside, the half pipe is easily brought close to the ring by an operation from the outside of the ring, and the pair of half pipes The gap can be widened.
請求項５に係る発明によれば、熟練作業を必要とせずに容易に既設鋼管柱の腐食部近傍を外側及び内側から確実に、且つ、体裁よく補強することが可能であり、既設鋼管柱の外部だけでなく、補強部分の内側に充填した内部モルタルによって既設鋼管柱内部の腐食の進行も防止できる。
また、リングの上下に上部鋼管柱及び下部鋼管柱を設置した後であっても、半割り管の内側に充填した内部モルタルを、簡単に既設鋼管柱の補強部分及びリングの内側に流入させることができ、施工が容易となる。
According to the fifth aspect of the present invention, it is possible to reinforce the vicinity of the corroded portion of the existing steel pipe column from the outside and the inside easily and without any need for skilled work. The progress of corrosion inside the existing steel pipe column can be prevented not only by the exterior but also by the internal mortar filled inside the reinforcing portion.
Also, even after the upper and lower steel pipe columns are installed above and below the ring, the internal mortar filled inside the halved pipe can easily flow into the reinforcement part of the existing steel pipe column and the inside of the ring. It can be done and construction is easy.
以下、本発明の実施例を図面に基づいて詳細に説明する。
本実施例において、発明の既設鋼管柱補強材は、図１及び図２に示すように、道路反射鏡に用いられている既設鋼管柱１の腐食部近傍を補強するものであって、既設鋼管柱１の腐食部近傍の外周囲を取り巻き、既設鋼管柱１との間に厚さ２０〜４０ｍｍ程度のモルタル充填空間５が形成される補強管２と、既設鋼管柱１の腐食部近傍の内部に上下方向に沿って挿入された一対の半割り管３と、これら半割り管３の周囲に嵌合されたリング４とを備える。
既設鋼管柱１は、比較的小型のものであって、既設鋼管柱１の下部は地中に打設された基礎コンクリート６に埋設されている。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the present embodiment, the existing steel pipe column stiffener of the invention reinforces the vicinity of the corroded portion of the existing steel pipe column 1 used in the road reflector as shown in FIGS. A reinforcing pipe 2 that surrounds the outer periphery in the vicinity of the corroded portion of the column 1 and is formed with a mortar filling space 5 having a thickness of about 20 to 40 mm between the steel pipe column 1 and an inner portion in the vicinity of the corroded portion of the existing steel pipe column 1 A pair of half pipes 3 inserted along the vertical direction and a ring 4 fitted around the half pipes 3 are provided.
The existing steel pipe column 1 is relatively small, and the lower part of the existing steel pipe column 1 is embedded in a foundation concrete 6 placed in the ground.
補強管２は、鋼等の金属を素材とする高さ２５０〜４５０ｍｍの周方向に連続した筒体である。なお、補強管２の高さ及び外径は既設鋼管柱１の寸法によって適宜変更することができる。
また、補強管２の内面には複数の（本実施例では４本の）外部補強リブ７が上下方向に沿って装着される。外部補強リブ７は、断面Ｔ字形で、ウェブ部の先端を補強管２の内面に溶接してある。外部補強リブ７の張り出し寸法は、モルタル充填空間５を区画してしまわないよう、既設鋼管柱１の外周面との間に十分な隙間ができる寸法とする。
図２及び図３に示すように、補強管２の下部（下端から８０ｍｍ程度の位置）には複数の（本実施例では４個の）ネジ孔８が周方向に等間隔で穿設され、ネジ孔８に芯出しネジ９がそれぞれ外側から内側に向けて螺合される。
The reinforcing pipe 2 is a cylindrical body continuous in the circumferential direction with a height of 250 to 450 mm made of a metal such as steel. In addition, the height and outer diameter of the reinforcing pipe 2 can be appropriately changed according to the dimensions of the existing steel pipe column 1.
A plurality of (four in this embodiment) external reinforcing ribs 7 are mounted on the inner surface of the reinforcing pipe 2 along the vertical direction. The external reinforcing rib 7 has a T-shaped cross section, and the tip of the web portion is welded to the inner surface of the reinforcing tube 2. The overhanging dimension of the external reinforcing rib 7 is a dimension that allows a sufficient gap between the outer peripheral surface of the existing steel pipe column 1 so as not to partition the mortar filling space 5.
As shown in FIGS. 2 and 3, a plurality of (four in this embodiment) screw holes 8 are formed at equal intervals in the circumferential direction at the lower portion (position of about 80 mm from the lower end) of the reinforcing tube 2. Centering screws 9 are screwed into the screw holes 8 from the outside to the inside.
一対の半割り管３は、図２及び図４に示すように、外径が既設鋼管柱１及びリング４の内径より小さい筒体を周方向に２分割した形状とされ、半割り管３の高さは、補強管２と同じかやや高く形成されている。
また、各半割り管３の内面には、上下方向に沿って内部補強リブ１０が装着される。内部補強リブ１０は、断面Ｔ字形で、ウェブ部の先端を半割り管３の内面に溶接してある。 さらに、半割り管３の内面の周方向中央部には、それぞれナット１１が溶接等により固定されている。
As shown in FIGS. 2 and 4, the pair of half pipes 3 are formed by dividing a cylindrical body whose outer diameter is smaller than the inner diameter of the existing steel pipe column 1 and the ring 4 into two in the circumferential direction. The height is the same as or slightly higher than that of the reinforcing tube 2.
Moreover, the internal reinforcement rib 10 is attached to the inner surface of each half pipe 3 along the up-down direction. The internal reinforcing rib 10 has a T-shaped cross section, and the tip of the web portion is welded to the inner surface of the half pipe 3. Further, nuts 11 are fixed to the central portion in the circumferential direction of the inner surface of the half pipe 3 by welding or the like.
リング４は、既設鋼管柱１と同径で、高さが５０ｍｍ程度の筒体より成り、直径の両端に相当する位置にそれぞれボルト１２が外側から内側に向けて挿通されている。
そして、リング４を一対の半割り管３の周囲に嵌合すると共に、ボルト１２を半割り管３に挿通し、リング４及び半割り管３を貫通したボルト１２の先端部をナット１１に螺合することにより、一対の半割り管３がリング４の内側に取り付けられている。
ボルト１２は半割り管３に固定されたナット１１に螺合してあるので、ボルト１２を回動させると半割り管３はリング４に接離する。また、半割り管３の外径はリング４の内径よりも小さいため、半割り管３をリング４に接近させると、一対の半割り管３の端部間に形成された隙間１３が広がる。
The ring 4 is formed of a cylindrical body having the same diameter as the existing steel pipe column 1 and a height of about 50 mm, and bolts 12 are inserted from the outside toward the inside at positions corresponding to both ends of the diameter.
Then, the ring 4 is fitted around the pair of half pipes 3, the bolt 12 is inserted into the half pipe 3, and the tip of the bolt 12 penetrating the ring 4 and the half pipe 3 is screwed to the nut 11. As a result, the pair of half pipes 3 are attached to the inside of the ring 4.
Since the bolt 12 is screwed into the nut 11 fixed to the half pipe 3, the half pipe 3 contacts and separates from the ring 4 when the bolt 12 is rotated. Further, since the outer diameter of the half pipe 3 is smaller than the inner diameter of the ring 4, when the half pipe 3 is brought close to the ring 4, a gap 13 formed between the end portions of the pair of half pipes 3 widens.
この既設鋼管柱補強材で、既設鋼管柱１の地表面付近に発生した腐食部近傍を補強するには、まず、図５に示すように、既設鋼管柱１の周囲において基礎コンクリート６の上部を斫り、既設鋼管柱１の補強部分を露出させる。基礎コンクリート６の斫り部分１４の深さは、補強管２の下端よりもやや深くなるようにする。
次に、既設鋼管柱１の腐食部１５を切除し、既設鋼管柱１を切除した部分よりも下方の下部鋼管柱１ａと、切除した部分よりも上方の上部鋼管柱１ｂとに分割する。
In order to reinforce the vicinity of the corroded portion generated near the ground surface of the existing steel pipe column 1 with the existing steel pipe column reinforcing material, first, as shown in FIG. The reinforced portion of the existing steel pipe column 1 is exposed. The depth of the turned portion 14 of the foundation concrete 6 is set to be slightly deeper than the lower end of the reinforcing pipe 2.
Next, the corroded portion 15 of the existing steel pipe column 1 is excised and divided into a lower steel pipe column 1a below the portion where the existing steel pipe column 1 is excised, and an upper steel pipe column 1b above the excised portion.
次いで、図６に示すように、下部鋼管柱１ａの内部に、速乾性の半割り管支持モルタル１６を充填した後、下部鋼管柱１ａの内部に一対の半割り管３の下部を挿入すると共に、リング４の下端面を下部鋼管柱１ａの上端面に当接する。
なお、予め、ボルト１２を回動操作することにより、一対の半割り管３をリング４の内面から離して、半割り管３間の隙間１３を狭めておく。
次に、図７に示すように、一対の半割り管３の内側に内部モルタル１７を充填する。内部モルタル１７は、半割り管３の上方に山盛りになるよう充填する。
Next, as shown in FIG. 6, after the inside of the lower steel pipe column 1a is filled with the quick-drying half pipe supporting mortar 16, the lower part of the pair of half pipes 3 is inserted into the lower steel pipe column 1a. The lower end surface of the ring 4 is brought into contact with the upper end surface of the lower steel pipe column 1a.
In addition, by rotating the bolt 12 in advance, the pair of half pipes 3 are separated from the inner surface of the ring 4 and the gap 13 between the half pipes 3 is narrowed.
Next, as shown in FIG. 7, internal mortar 17 is filled inside the pair of half pipes 3. The internal mortar 17 is filled in a heap above the half pipe 3.
その後、下部鋼管柱１ａ、半割り管３及びリング４の外周囲に上方から補強管２を被せ、補強管２を芯出しネジ９によって下部鋼管柱１ａに仮固定する。
次いで、図８に示すように、上部鋼管柱１ｂの下部を補強管２の内部に挿入して半割り管３の周囲に被せ、その下端面をリング４の上端面に当接する。
さらに、補強管２を上方に移動させて、芯出しネジ９によって上部鋼管柱１ｂに仮固定し、リング４及び既設鋼管柱１の補強部分を露出させる。
次に、内部モルタル１７が硬化する前に、ボルト１２を回動操作して一対の半割り管３をリング４の内面に接近させ、半割り管３間の隙間１３を広げてから、上部鋼管柱１ｂを叩く。すると、一対の半割り管３の内部に充填された内部モルタル１７が隙間１３を通して上部鋼管柱１ｂ及びリング４と半割り管３との間に流入する。
Thereafter, the outer periphery of the lower steel pipe column 1 a, the half pipe 3 and the ring 4 is covered with the reinforcing pipe 2 from above, and the reinforcing pipe 2 is temporarily fixed to the lower steel pipe column 1 a with a centering screw 9.
Next, as shown in FIG. 8, the lower part of the upper steel pipe column 1 b is inserted into the reinforcing pipe 2 and covered around the half pipe 3, and the lower end surface thereof is brought into contact with the upper end surface of the ring 4.
Further, the reinforcing pipe 2 is moved upward and temporarily fixed to the upper steel pipe column 1b by the centering screw 9, and the reinforcing part of the ring 4 and the existing steel pipe column 1 is exposed.
Next, before the internal mortar 17 is hardened, the bolt 12 is rotated to bring the pair of half pipes 3 closer to the inner surface of the ring 4 and the gap 13 between the half pipes 3 is widened. Hit the pillar 1b. Then, the internal mortar 17 filled in the pair of half pipes 3 flows between the upper steel pipe column 1 b and the ring 4 and the half pipe 3 through the gap 13.
次いで、図９に示すように、補強管２を下降させ、補強管２の下半部を基礎コンクリート６の斫り部分１４の内部に配置する。
その後、芯出しネジ９を進退させてその先端を既設鋼管柱１の外周面に当接させ、補強管２の外側に露出する芯出しネジ９の長さが全て同じくなるよう調節することにより、補強管２の中心を既設鋼管柱１の中心に合わせると共に、補強管２を既設鋼管柱１に固定する。これにより、補強管２と既設鋼管柱１及びリング４との間に均一な厚みのモルタル充填空間５が形成される。
Next, as shown in FIG. 9, the reinforcing pipe 2 is lowered, and the lower half of the reinforcing pipe 2 is arranged inside the turned portion 14 of the foundation concrete 6.
Thereafter, the centering screw 9 is advanced and retracted, the tip thereof is brought into contact with the outer peripheral surface of the existing steel pipe column 1, and the length of the centering screw 9 exposed to the outside of the reinforcing pipe 2 is adjusted to be all the same. The center of the reinforcing pipe 2 is aligned with the center of the existing steel pipe column 1 and the reinforcing pipe 2 is fixed to the existing steel pipe column 1. Thereby, a mortar filling space 5 having a uniform thickness is formed between the reinforcing pipe 2 and the existing steel pipe column 1 and the ring 4.
さらに、再度、既設鋼管柱１を軽く叩いて、内部モルタル１７を隅まで詰める。
次に、基礎コンクリート６の斫り部分１４を速乾モルタル１８で埋め、モルタル充填空間５に速乾性のモルタル１９を充填する。
斫り部分１４に充填した速乾モルタル１８の上面は、既設鋼管柱１に近付くほど高くなるよう勾配をつける。
モルタル１９が乾燥したら、モルタル１９の上面にプライマを塗布し、さらに変成シリコンで防水処理を施す。
Further, the existing steel pipe column 1 is tapped again to pack the internal mortar 17 to the corner.
Next, the turned portion 14 of the foundation concrete 6 is filled with the quick-drying mortar 18 and the mortar filling space 5 is filled with the quick-drying mortar 19.
The upper surface of the quick-drying mortar 18 filled in the turned portion 14 is inclined so as to become higher as it approaches the existing steel pipe column 1.
When the mortar 19 is dried, a primer is applied to the upper surface of the mortar 19 and further waterproofed with modified silicon.
なお、図に示す例では、既設鋼管柱１、補強管２及びリング４を断面円形とし、半割り管３を断面半円形としたが、既設鋼管柱１の補強部分の断面が角形であれば、補強管２、半割り管３及びリング４の断面も角形とする。
また、既設鋼管柱１の寸法に応じて、補強管２及び半割り管３の寸法や外部補強リブ７の数も適宜変更することができる。
さらに、補強管２のネジ孔８及び芯出しネジ９の数は３個以上であれば良く、外部補強リブ７及び内部補強リブ１０の断面形状も図に示す例に限定されない。
In the example shown in the figure, the existing steel pipe column 1, the reinforcing pipe 2 and the ring 4 have a circular cross section, and the half pipe 3 has a semicircular cross section. However, if the cross section of the reinforcing portion of the existing steel pipe column 1 is square, The cross sections of the reinforcing tube 2, the half tube 3, and the ring 4 are also square.
Moreover, according to the dimension of the existing steel pipe pillar 1, the dimension of the reinforcement pipe 2 and the half pipe 3 and the number of the external reinforcement ribs 7 can also be changed suitably.
Furthermore, the number of the screw holes 8 and the centering screws 9 in the reinforcing tube 2 may be three or more, and the cross-sectional shapes of the external reinforcing rib 7 and the internal reinforcing rib 10 are not limited to the example shown in the drawing.
１ 既設鋼管柱
１ａ 下部鋼管柱
１ｂ 上部鋼管柱
２ 補強管
３ 半割り管
４ リング
５ モルタル充填空間
６ 基礎コンクリート
７ 外部補強リブ
８ ネジ孔
９ 芯出しネジ
１０ 内部補強リブ
１１ ナット
１２ ボルト
１３ 隙間
１４ 斫り部分
１５ 腐食部
１６ 半割り管支持モルタル
１７ 内部モルタル
１８ 速乾モルタル
１９ モルタル
DESCRIPTION OF SYMBOLS 1 Existing steel pipe pillar 1a Lower steel pipe pillar 1b Upper steel pipe pillar 2 Reinforcement pipe 3 Half split pipe 4 Ring 5 Mortar filling space 6 Foundation concrete 7 External reinforcement rib 8 Screw hole 9 Centering screw 10 Internal reinforcement rib 11 Nut 12 Bolt 13 Gap 14 Spiral part 15 Corrosion part 16 Half pipe support mortar 17 Internal mortar 18 Quick dry mortar 19 Mortar
Claims (5)
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| JP2012025164A JP5014520B1 (en) | 2012-02-08 | 2012-02-08 | Existing steel pipe column reinforcement and its construction method |
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| JP5014520B1 true JP5014520B1 (en) | 2012-08-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5881261B1 (en) * | 2014-12-26 | 2016-03-09 | 株式会社不二電業社 | Existing strut pipe reinforcement and its construction method |
| CN108979285A (en) * | 2018-07-18 | 2018-12-11 | 北票电力电杆制造有限公司 | A kind of sectional annular concrete electric pole and its installation method |
| CN113982314A (en) * | 2021-12-10 | 2022-01-28 | 国网山东省电力公司临沂供电公司 | Quick prosthetic devices of disconnected pole |
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| JP6042779B2 (en) * | 2013-07-30 | 2016-12-14 | 鹿島建設株式会社 | Method for fixing shear reinforcement member |
| JP6305057B2 (en) * | 2013-12-27 | 2018-04-04 | 株式会社熊谷組 | Diagonal reinforcement and reinforcement method |
| KR102075012B1 (en) * | 2019-08-27 | 2020-02-10 | (주)로드키네마틱스 | Post Protection Shock Absorber |
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| KR102373470B1 (en) * | 2020-01-21 | 2022-03-14 | 주식회사케이베츠 | Stressed clamped hinge type connection for circular cross section members and its installation sequence |
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| JP2011117166A (en) * | 2009-12-02 | 2011-06-16 | Fuji Dengyosha:Kk | Reinforcing material for preventing corrosion of existing steel-pipe column |
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| JP5881261B1 (en) * | 2014-12-26 | 2016-03-09 | 株式会社不二電業社 | Existing strut pipe reinforcement and its construction method |
| CN108979285A (en) * | 2018-07-18 | 2018-12-11 | 北票电力电杆制造有限公司 | A kind of sectional annular concrete electric pole and its installation method |
| CN113982314A (en) * | 2021-12-10 | 2022-01-28 | 国网山东省电力公司临沂供电公司 | Quick prosthetic devices of disconnected pole |
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| JP2013160023A (en) | 2013-08-19 |
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