JP3030638U - Steel plate structure for seismic reinforcement of concrete piers - Google Patents
Steel plate structure for seismic reinforcement of concrete piersInfo
- Publication number
- JP3030638U JP3030638U JP1996003552U JP355296U JP3030638U JP 3030638 U JP3030638 U JP 3030638U JP 1996003552 U JP1996003552 U JP 1996003552U JP 355296 U JP355296 U JP 355296U JP 3030638 U JP3030638 U JP 3030638U
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- pier
- concrete
- outer peripheral
- peripheral surface
- 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.)
- Expired - Lifetime
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Abstract
(57)【要約】
【課題】 コンクリート橋脚の外周面に、鋼板を取付け
ボルト及び接着剤を介して張り付ける際に、その取付け
ボルトねじ込み用のアンカーを打込むアンカー穴を橋脚
に穿孔時に、削りカス等の粉塵が橋脚の外周面と鋼板と
の隙間に落下するのを防止でき、橋脚に対する鋼板の接
着強度の向上をはかりうるコンクリート橋脚の耐震補強
用鋼板構造体を提供する。
【解決手段】 コンクリートの橋脚2の外周面に、多数
の取付けボルト5のねじ込み及び接着剤4を介して張り
付ける鋼板1に、取付けボルト5挿入用のボルト穴8を
多数設けると共に、鋼板1の各ボルト穴8の裏面に伸縮
性を有するパッキング材9を張り付ける。
(57) [Abstract] [PROBLEMS] When a steel plate is attached to the outer peripheral surface of a concrete bridge pier via a mounting bolt and an adhesive, an anchor hole for driving an anchor for screwing the mounting bolt is shaved when drilling the pier. Provided is a steel plate structure for earthquake-proof reinforcement of a concrete pier, which can prevent dust such as dust from falling into the gap between the outer peripheral surface of the pier and the steel plate, and can improve the adhesive strength of the steel plate to the pier. SOLUTION: A steel plate 1 which is attached to the outer peripheral surface of a concrete pier 2 by screwing a large number of mounting bolts 5 and an adhesive 4 is provided with a large number of bolt holes 8 for inserting the mounting bolts 5, and the steel plate 1 A packing material 9 having elasticity is attached to the back surface of each bolt hole 8.
Description
【0001】[0001]
本考案は、主として既存のコンクリート橋脚の耐震性を向上するために、その 橋脚外周面に鋼板巻立工法により耐震補強用鋼板を取付けボルトと接着剤で張り 付ける際に、コンクリート橋脚に取付けボルトねじ込み用のアンカーを打込む際 に、アンカー穴を削孔時に生ずるコンクリートの削りカスなどが橋脚表面と鋼板 との隙間に落下するのを防止できるコンクリート橋脚の耐震補強用鋼板構造体に 関する。 The present invention is mainly intended to improve the earthquake resistance of an existing concrete pier, and when a steel plate for seismic reinforcement is attached to the outer peripheral surface of the pier by the steel plate winding construction method with a mounting bolt and an adhesive, screw the mounting bolt into the concrete pier. The present invention relates to a steel plate structure for seismic reinforcement of a concrete pier that can prevent concrete scraps and the like generated when drilling an anchor hole from dropping into the gap between the surface of the pier and the steel plate when driving an anchor.
【0002】[0002]
近年、本邦で発生している大型地震においては、高速道路や鉄道軌条等のコン クリート橋脚に当初の設計値以上の大きな衝撃が加わることにより、橋脚が損壊 し大事故発生の恐れがあることが判明した。 そこで、上記のごとき既設のコンクリート橋脚に対してその耐震強度を増大さ せるために、橋脚の外周面に鋼板を強固に接合する鋼板巻立工法の施工が行なわ れている。 In recent years, when a large earthquake occurs in Japan, a large impact more than the originally designed value may be applied to concrete piers such as highways and railroad tracks, which may damage the piers and cause a major accident. found. Therefore, in order to increase the seismic strength of the existing concrete piers as mentioned above, the steel plate winding method is used to firmly join the steel plates to the outer peripheral surface of the piers.
【0003】 この工法は、コンクリート橋脚の外周面に対し、鋼板を多数の取付けボルトの ねじ込みと、接着剤とで張り付けるものであるが、一般的なコンクリート橋脚の 鉄筋被りは、主鉄筋中心まで約100mmであり、帯鉄筋の外側から橋脚コンクリ ート表面までの距離を考慮すれば、約70mm程度であり、取付けボルトねじ込み 用のアンカーの削孔深さは、鉄筋部分においては70mm以上の削孔深さの施工が 不可能となり、そのため上記の削孔深さ以内で施工できるアンカーボルトコーン をアンカー穴に打ち込み、そのアンカー内の雌ねじに取付けボルトをねじ込むこ とが行なわれている。In this method, a steel plate is attached to the outer peripheral surface of a concrete pier with a large number of mounting bolts and an adhesive agent. It is about 100 mm, and it is about 70 mm considering the distance from the outside of the reinforced steel bars to the surface of the pier concrete surface. The anchor drilling depth for screwing the mounting bolt is 70 mm or more at the reinforcing bar. Since it is impossible to construct the hole depth, it is necessary to drive an anchor bolt cone that can be constructed within the above drilling depth into the anchor hole and screw the mounting bolt into the female screw inside the anchor.
【0004】 しかしながら、コンクリート橋脚に対し、鋼板取り付け用のアンカー穴をドリ ルなどで穿孔する際には、張り付けられる鋼板とコンクリート橋脚の表面との間 の狭い隙間に穿孔時のコンクリートの削りカス等の粉塵が落下し、さらにその隙 間に詰まってしまい、その隙間に注入される樹脂などの接着剤の接着強度が弱め られ、所定の耐震補強の強度が得られなくなるという問題がある。However, when drilling an anchor hole for attaching a steel plate to a concrete pier with a drill or the like, concrete scraps or the like during drilling are provided in a narrow gap between the steel plate to be attached and the surface of the concrete pier. There is a problem that the dust falls and is clogged in the gaps, and the adhesive strength of the resin and other adhesives injected into the gaps is weakened, and the prescribed strength for seismic reinforcement cannot be obtained.
【0005】 そこで、このアンカー穴の穿孔時において排出されるコンクリートの削りカス などの粉塵の処理としては、従来エアブロー等で行っているが、鋼板裏面に落下 した上記粉塵などを充分除去することはできないのが現状である。[0007] Thus, the dust such as concrete shavings discharged when the anchor hole is drilled is conventionally treated by air blow or the like, but it is not possible to sufficiently remove the dust and the like dropped on the back surface of the steel plate. The current situation is that it cannot be done.
【0006】[0006]
本考案は、コンクリート橋脚の外周面に、鋼板を取付けボルトのねじ込み及び 接着剤を介して張り付ける際に、その取付けボルトねじ込みのためのアンカー打 込み用のアンカー穴を、コンクリート橋脚に対して穿孔時に、コンクリートの削 りカス等の粉塵がコンクリート橋脚の外周面と鋼板との隙間に落下することを防 止でき、橋脚表面に対する鋼板の樹脂接着強度の向上をはかりうるコンクリート 橋脚の耐震補強用鋼板構造体を提供することを解決課題としたものである。 The present invention, when the steel plate is screwed onto the outer peripheral surface of the concrete pier and is attached with an adhesive, an anchor hole for anchor driving for screwing the mounting bolt is drilled in the concrete pier. At times, dust such as scraps of concrete can be prevented from falling into the gap between the outer surface of the concrete pier and the steel plate, and the steel plate for earthquake-proof reinforcement of concrete piers can be improved to improve the resin bond strength of the steel plate to the pier surface. The problem to be solved is to provide a structure.
【0007】[0007]
本考案は、コンクリート橋脚外周面に、多数の取付けボルトのねじ込み及び樹 脂等の接着剤を介して取り付ける鋼板に、上記取付けボルト挿入用のボルト穴を 多数設けると共に、その鋼板の各ボルト穴の裏面に伸縮性を有するウレタンその 他のパッキング材を接着剤などで張り付けたコンクリート橋脚の耐震補強用鋼板 構造体からなる。 The present invention provides a large number of bolt holes for inserting the mounting bolts on a steel plate to be mounted on the outer peripheral surface of a concrete bridge pier by screwing in a large number of mounting bolts and an adhesive such as resin, and It consists of a steel plate structure for earthquake-proof reinforcement of concrete piers, with urethane on the backside having elasticity and other packing materials attached with adhesive.
【0008】 また、本考案は、上記のコンクリート橋脚の外周面に張り付ける鋼板に、接着 剤を注入する注入穴を適宜な数だけ設けているコンクリート橋脚の耐震補強用鋼 板構造体からなる。Further, the present invention comprises a steel plate structure for seismic reinforcement of a concrete pier in which an appropriate number of injection holes for injecting an adhesive are provided in a steel plate attached to the outer peripheral surface of the concrete pier.
【0009】[0009]
以下図面を参照して本考案の耐震補強用鋼板構造体の一実施形態につき説明す るが、この鋼板構造体11は、図6に示すような高速道路等のコンクリート製の 橋脚2の外周面に対し鋼板巻立工法で施工されるものであり、図6のA−A方向 の平断面の斜視図を図1で、そして図1の平断面図を図2に示している。この鋼 板構造体11の鋼板1は、コンクリートの橋脚2の外周面に対し、図2の矢印B 部分の拡大平断面図である図3のごとく、取付けボルト5のねじ込み及び、例え ばエポキシ樹脂などの接着剤4を介して張り付けられている。 An embodiment of the steel plate structure for earthquake-proof reinforcement of the present invention will be described below with reference to the drawings. The steel plate structure 11 is an outer peripheral surface of a concrete pier 2 such as a highway as shown in FIG. On the other hand, it is constructed by the steel plate winding method, and a perspective view of the plane cross section in the AA direction of FIG. 6 is shown in FIG. 1, and a plane cross section of FIG. 1 is shown in FIG. The steel plate 1 of the steel plate structure 11 is attached to the outer peripheral surface of the concrete pier 2 as shown in FIG. 3 which is an enlarged plan sectional view of an arrow B portion of FIG. It is attached via an adhesive 4 such as.
【0010】 この鋼板1には、図3に示すような皿ボルト等の取付けボルト5が図1及び図 2に示すごとく橋脚2の外表面に対し多数ねじ込まれているが、この実施形態に おいては、図3に示すごとく、コンクリートの橋脚2に穿孔されたアンカー穴6 に、内部がコーン状に形成され、打込むことにより先端がアンカー穴6内に開く 方式の内部打込み式のアンカー7が打込まれており、このアンカー7 の先端内部 の雌ねじに対し、上記取付けボルト5の雄ねじをねじ込むことで鋼板1を橋脚2 の外周面に締着するようになっている。A large number of mounting bolts 5 such as countersunk bolts as shown in FIG. 3 are screwed into the steel plate 1 with respect to the outer surface of the pier 2 as shown in FIGS. 1 and 2. As shown in FIG. 3, the inside of the anchor hole 6 formed in the concrete pier 2 is formed into a cone shape, and the tip is opened into the anchor hole 6 by driving. The steel plate 1 is fastened to the outer peripheral surface of the pier 2 by screwing the male screw of the mounting bolt 5 into the female screw inside the tip of the anchor 7.
【0011】 即ち、本考案の鋼板構造体11の鋼板1には、図5の要部拡大正面図のごとく 、多数の取付けボルト5の挿入用のボルト穴8が設けられており、このボルト穴 8からドリルなどによりコンクリートの橋脚2の外周面に上記のアンカー穴6を 穿孔することになるが、これらの各ボルト穴8の裏面に、図3、図4及び図5に 示すようにパッキング材9を張り付けている。That is, the steel plate 1 of the steel plate structure 11 of the present invention is provided with bolt holes 8 for inserting a large number of mounting bolts 5 as shown in the enlarged front view of the main part of FIG. The anchor holes 6 are drilled on the outer peripheral surface of the concrete pier 2 from 8 by a drill or the like. The packing material is formed on the back surface of each of the bolt holes 8 as shown in FIGS. 3, 4 and 5. 9 is stuck.
【0012】 このパッキング材9は、伸縮性を有する材料で形成されており、この実施形態 においては接着剤4の樹脂の浸透性に優れたウレタンなどを使用し、また図4に 示すように片面に接着剤10を付着させたものとし、鋼板1を橋脚2外周面に張 り付ける前に予め鋼板1の各ボルト穴8の裏面にそれぞれパッキング材9を付着 させておくものである。The packing material 9 is formed of a material having elasticity, and in this embodiment, urethane or the like having excellent resin permeability of the adhesive 4 is used, and as shown in FIG. Adhesive 10 is attached to the steel plate 1, and the packing material 9 is attached to the back surface of each bolt hole 8 of the steel plate 1 in advance before the steel plate 1 is attached to the outer peripheral surface of the pier 2.
【0013】 また、このパッキング材9はリング状に形成され、その内径Dはアンカー穴6 の径より若干大きくし、厚さTは、橋脚2の外周面と、巻き付けられる鋼板1と の間隙を約4mmとすると、T=10mm程度としており、取付ボルト5で鋼板1を 橋脚2に締着することにより、厚さTが適宜に圧縮されるようになっており、こ れによりボルト穴8からコンクリート面にアンカー穴6を穿孔する際の削りカス 等の粉塵が橋脚2の外周面と鋼板1との隙間に侵入し、落下するのをシャットア ウトするようになっている。The packing material 9 is formed in a ring shape, the inner diameter D of which is slightly larger than the diameter of the anchor hole 6, and the thickness T is the gap between the outer peripheral surface of the pier 2 and the steel plate 1 to be wound. When it is set to about 4 mm, T = about 10 mm, and when the steel plate 1 is fastened to the pier 2 with the mounting bolts 5, the thickness T is appropriately compressed. Dust such as shavings when the anchor hole 6 is drilled on the concrete surface intrudes into the gap between the outer peripheral surface of the pier 2 and the steel plate 1 and shuts out from falling.
【0014】 また、上記の鋼板1には前記接着剤4の注入穴12を図5に示すごとく適宜な 数だけ設けており、橋脚2の外周面と鋼板1との隙間に樹脂の接着剤4が均一に 注入されるようにできるだけ多くの注入穴12を設けることが望ましく、また各 注入穴12には着脱可能な蓋を取り付けることも好ましい。 次に、上記本考案の耐震補強用の鋼板構造体11を図6で示すごときコンクリ ートの橋脚2に巻立施工時の手順を説明すると、鋼板1を吊上げフック13を使 用してクレーンなどで吊上げて橋脚2の取付位置に移動し、位置決めし、リーマ ボルトまたは数本のボルトを利用して鋼板1の位置固定を行う。Further, the steel plate 1 is provided with an appropriate number of injection holes 12 for the adhesive 4 as shown in FIG. 5, and the resin adhesive 4 is provided in the gap between the outer peripheral surface of the pier 2 and the steel plate 1. It is desirable to provide as many injection holes 12 as possible so that the injection can be performed uniformly, and it is also preferable to attach a removable lid to each injection hole 12. Next, a description will be given of the procedure for winding the seismic reinforcing steel plate structure 11 of the present invention on the concrete pier 2 as shown in FIG. Then, lift it up and move it to the installation position of the pier 2, position it, and fix the position of the steel plate 1 using a reamer bolt or several bolts.
【0015】 その後、コンクリートの橋脚2に対し、鋼板1の各ボルト穴8からそれぞれア ンカー穴6をドリル等により穿孔して、アンカー7を各アンカー穴6に打ち込む 。 次に、鋼板1の表面から各ボルト穴8に皿ボルト等の取付けボルト5を挿入し 、アンカー7にねじで締付けて固定することによりパッキング材9は圧縮される 。After that, on the concrete pier 2, the anchor holes 6 are drilled from the bolt holes 8 of the steel plate 1 by a drill or the like, and the anchors 7 are driven into the anchor holes 6. Next, the packing material 9 is compressed by inserting the mounting bolts 5 such as countersunk bolts from the surface of the steel plate 1 into the respective bolt holes 8 and tightening and fixing them to the anchors 7 with screws.
【0016】 その後、各鋼板の端縁部の開先加工を施された部分に、図1の矢印Wで示すご とく溶接仕上げを行なった後、樹脂の接着剤4を注入穴12から注入して、鋼板 1を橋脚2の外周面に強固に張り付けし、その外面の塗装を行ない施工を完了す る。After that, a groove-finished portion of the edge of each steel plate is subjected to a very welding finish as shown by an arrow W in FIG. 1, and then a resin adhesive 4 is injected through an injection hole 12. Then, the steel plate 1 is firmly attached to the outer peripheral surface of the pier 2, and the outer surface is painted to complete the construction.
【0017】[0017]
以上に説明した本考案の耐震補強用鋼板構造体を適用してコンクリート橋脚の 外周面に鋼板巻立施工を行えば、コンクリート橋脚に対してアンカー穴を穿孔時 に、コンクリートの削りカス等の粉塵が橋脚の外周面と鋼板との隙間に落下する のを防止できるので、橋脚表面に対する鋼板の樹脂接着強度の向上がはかれるこ とになる。 その結果、既設のコンクリート橋脚を耐震強度の高い構造体に格上げすること ができる。 If the steel plate structure for earthquake-proof reinforcement of the present invention described above is applied to wind up the steel plate on the outer peripheral surface of the concrete pier, dust such as concrete scraps will be removed when the anchor hole is drilled in the concrete pier. Can be prevented from falling into the gap between the outer peripheral surface of the pier and the steel plate, so that the resin bond strength of the steel plate to the pier surface can be improved. As a result, existing concrete piers can be upgraded to structures with high seismic resistance.
【図1】コンクリート製の橋脚の外周面に鋼板を張り付
けた図6のA−A方向の平断面を示す斜視図である。FIG. 1 is a perspective view showing a plane cross section taken along line AA of FIG. 6 in which a steel plate is attached to the outer peripheral surface of a concrete bridge pier.
【図2】図1の平断面図である。FIG. 2 is a plan sectional view of FIG.
【図3】図2の矢印B部分の拡大平断面図である。FIG. 3 is an enlarged plan sectional view of a portion indicated by an arrow B in FIG.
【図4】図3のパッキング材の拡大斜視図である。FIG. 4 is an enlarged perspective view of the packing material of FIG.
【図5】図1の鋼板の要部拡大の正面図である。5 is a front view showing an enlarged main part of the steel plate of FIG. 1. FIG.
【図6】コンクリート橋脚に本考案の耐震補強用鋼板構
造体の施工を行なった部分断面で示す正面図である。FIG. 6 is a front view showing a partial cross-section in which the steel plate structure for earthquake-proof reinforcement of the present invention is applied to a concrete pier.
1 鋼板 2 橋脚 4 接着剤 5 取付けボル
ト 8 ボルト穴 9 パッキング
材 11 鋼板構造体 12 注入穴1 Steel Plate 2 Bridge Pier 4 Adhesive 5 Mounting Bolt 8 Bolt Hole 9 Packing Material 11 Steel Plate Structure 12 Injection Hole
Claims (2)
けボルトのねじ込み及び接着剤を介して張り付ける鋼板
に、上記取付けボルト挿入用のボルト穴を多数設けると
共に、その鋼板の各ボルト穴の裏面に伸縮性を有するパ
ッキング材を張り付けてなるコンクリート橋脚の耐震補
強用鋼板構造体。1. A steel plate to be attached to the outer peripheral surface of a concrete bridge pier by screwing a number of mounting bolts and bonding with an adhesive, and a plurality of bolt holes for inserting the mounting bolts are provided on the back surface of each bolt hole of the steel plate. A steel plate structure for seismic reinforcement of concrete piers, which is made by attaching elastic packing material.
請求項1記載の鋼板に、接着剤の注入穴を適宜な数だけ
設けるコンクリート橋脚の耐震補強用鋼板構造体。2. A steel plate structure for seismic reinforcement of a concrete pier, wherein the steel plate according to claim 1 attached to the outer peripheral surface of the concrete pier is provided with an appropriate number of holes for injection of an adhesive.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1996003552U JP3030638U (en) | 1996-04-26 | 1996-04-26 | Steel plate structure for seismic reinforcement of concrete piers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1996003552U JP3030638U (en) | 1996-04-26 | 1996-04-26 | Steel plate structure for seismic reinforcement of concrete piers |
Publications (1)
Publication Number | Publication Date |
---|---|
JP3030638U true JP3030638U (en) | 1996-11-01 |
Family
ID=43165622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP1996003552U Expired - Lifetime JP3030638U (en) | 1996-04-26 | 1996-04-26 | Steel plate structure for seismic reinforcement of concrete piers |
Country Status (1)
Country | Link |
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JP (1) | JP3030638U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20010038534A (en) * | 1999-10-26 | 2001-05-15 | 장재근 | Process Of Repairing A Pier |
JP3455449B2 (en) | 1998-12-03 | 2003-10-14 | 株式会社奥村組 | Construction method of reaction force receiving member of tunnel excavator and reaction force receiving member |
JP2019163598A (en) * | 2018-03-19 | 2019-09-26 | 戸田建設株式会社 | Reinforcing structure and reinforcing method for existing reinforced concrete structure |
-
1996
- 1996-04-26 JP JP1996003552U patent/JP3030638U/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3455449B2 (en) | 1998-12-03 | 2003-10-14 | 株式会社奥村組 | Construction method of reaction force receiving member of tunnel excavator and reaction force receiving member |
KR20010038534A (en) * | 1999-10-26 | 2001-05-15 | 장재근 | Process Of Repairing A Pier |
JP2019163598A (en) * | 2018-03-19 | 2019-09-26 | 戸田建設株式会社 | Reinforcing structure and reinforcing method for existing reinforced concrete structure |
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