JP3513784B2 - How to reinforce pillars of viaduct - Google Patents
How to reinforce pillars of viaductInfo
- Publication number
- JP3513784B2 JP3513784B2 JP34902095A JP34902095A JP3513784B2 JP 3513784 B2 JP3513784 B2 JP 3513784B2 JP 34902095 A JP34902095 A JP 34902095A JP 34902095 A JP34902095 A JP 34902095A JP 3513784 B2 JP3513784 B2 JP 3513784B2
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- epoxy resin
- bolt
- air vent
- vent pipe
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 90
- 239000010959 steel Substances 0.000 claims description 90
- 239000003822 epoxy resin Substances 0.000 claims description 66
- 229920000647 polyepoxide Polymers 0.000 claims description 66
- 238000002347 injection Methods 0.000 claims description 41
- 239000007924 injection Substances 0.000 claims description 41
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 40
- 229920005989 resin Polymers 0.000 claims description 35
- 239000011347 resin Substances 0.000 claims description 35
- 238000003780 insertion Methods 0.000 claims description 33
- 230000037431 insertion Effects 0.000 claims description 33
- 239000004567 concrete Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 239000011150 reinforced concrete Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 210000005036 nerve Anatomy 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Landscapes
- Working Measures On Existing Buildindgs (AREA)
- Bridges Or Land Bridges (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は高架橋における鉄筋
コンクリート製の脚柱を補強するための脚柱補強方法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pedestal reinforcement method for reinforcing reinforced concrete pedestals in viaducts.
【0002】[0002]
【従来の技術】高速道路橋や鉄道橋等の高架橋は、図6
に概略を示す如く、地中に埋設した基礎杭1上にフーチ
ング2を構築し、該フーチング2上に鉄筋コンクリート
製の脚柱3を立設して地表面(GL)上に突出させ、該
脚柱3の上端に梁4を設けて、隣接する脚柱3上端の梁
4の上に床版5を載置させることにより建設されてお
り、床版5及び床版5上の荷重を梁4から脚柱3、フー
チング2、基礎杭1を介して地盤に伝えるようにしてあ
る。2. Description of the Related Art Viaducts such as highway bridges and railway bridges are shown in FIG.
As shown in Fig. 2, a footing 2 is constructed on a foundation pile 1 buried in the ground, and a reinforced concrete pedestal 3 is erected on the footing 2 to project above the ground surface (GL). It is constructed by providing a beam 4 at the upper end of the pillar 3 and placing a floor slab 5 on the beam 4 at the upper end of the adjacent pillar 3 to load the floor slab 5 and the load on the floor slab 5 to the beam 4. Is transmitted to the ground through the pedestal 3, footing 2, and foundation pile 1.
【0003】上記高架橋においては、近年、耐震強度を
更に高めるために、脚柱3を補強することが行われてい
る。In the above-mentioned viaduct, in recent years, the pedestal 3 has been reinforced in order to further increase the earthquake resistance.
【0004】高架橋の脚柱補強方法の一つとして、地表
面GLを掘削してフーチング2の天端から梁4の下面ま
での脚柱全高さの外周に、4〜5mmの隙間を形成保持さ
せるように鋼板を巻き付けて、上記隙間にエポキシ樹脂
を注入し、脚柱に鋼板を一体化させて脚柱を補強するよ
うにした方法が知られている。As one of the methods for reinforcing the pillars of the viaduct, the ground surface GL is excavated to form and hold a gap of 4 to 5 mm on the outer circumference of the entire height of the pillars from the top of the footing 2 to the lower surface of the beam 4. There is known a method in which a steel plate is wound in such a manner, epoxy resin is injected into the gap, and the steel plate is integrated with the pedestal to reinforce the pedestal.
【0005】従来公知の補強方法を具体的に説明する
と、図7乃至図11に示す如く、たとえば、直径が3m
で高さが10m位の脚柱3を補強する場合には、輸送上
の制限から、周方向に4分割し且つ上下方向に2分割し
た如きセグメント形状とした鋼板6を用意し、これら各
鋼板6には、鋼板6を脚柱3に保持させるための皿ボル
ト7を挿通させる皿孔状のボルト挿通孔8と、エポキシ
樹脂9を注入するための樹脂注入パイプ13の挿入用孔
10とを縦方向、横方向に所定間隔で配列されるように
多数穿設し、更に、内面に、隙間形成用の小さいスペー
サ(図示せず)が多数取り付けてある。A conventionally known reinforcing method will be described in detail. As shown in FIGS. 7 to 11, for example, the diameter is 3 m.
In order to reinforce the pedestal 3 having a height of about 10 m, a steel plate 6 having a segment shape divided into four in the circumferential direction and two in the vertical direction is prepared due to transportation restrictions. 6, a countersunk bolt insertion hole 8 for inserting a countersunk bolt 7 for holding the steel plate 6 on the pillar 3 and an insertion hole 10 for a resin injection pipe 13 for injecting the epoxy resin 9 are provided. A large number of holes are provided so as to be arranged at predetermined intervals in the vertical direction and the horizontal direction, and furthermore, a large number of small spacers (not shown) for forming gaps are attached to the inner surface.
【0006】上記加工が施してある各鋼板6を現場へ搬
入して、図8及び図9に示す如く、脚柱3の外周に配置
し、溶接により互いに接合して筒状に組み立てて脚柱3
に巻き付けるようにし、鋼板6と脚柱3との間に隙間S
を形成させるようにする。次に、図10に示す如く、鋼
板6に穿設されている各ボルト挿通孔8を利用して脚柱
3の外壁部にドリルによって所要深さのアンカー埋込穴
11を設け、これらのアンカー埋込穴11に雌ねじコン
クリートアンカー12を埋め込んだ後、各雌ねじコンク
リートアンカー12に、ボルト挿通孔8を通し皿ボルト
7を差し込んでねじ込むことにより、皿ボルト7の頭部
で鋼板6を押えて脚柱3の外周に鋼板6を固定させ、鋼
板6と脚柱3との間の隙間Sを一定に保持させるように
する。Each of the steel plates 6 having been subjected to the above-mentioned processing is carried to the site, placed on the outer periphery of the pedestal 3 as shown in FIGS. 8 and 9, and joined to each other by welding to assemble them into a tubular shape. Three
And the gap S between the steel plate 6 and the pedestal 3.
To form. Next, as shown in FIG. 10, by using each bolt insertion hole 8 formed in the steel plate 6, an anchor embedding hole 11 having a required depth is formed in the outer wall portion of the pedestal 3 by a drill, and these anchors are formed. After embedding the female threaded concrete anchors 12 in the embedding holes 11, by inserting the countersunk bolts 7 into the female threaded concrete anchors 12 through the bolt insertion holes 8 and screwing the steel bolts 6 with the heads of the countersunk bolts 7, The steel plate 6 is fixed to the outer periphery of the pillar 3 so that the gap S between the steel plate 6 and the pedestal 3 is kept constant.
【0007】又、上述した皿ボルト7による鋼板6の固
定作業と相前後して、図11に示す如く、鋼板6に穿設
されている樹脂注入パイプ13の挿入用孔10に、アル
ミニウム製の樹脂注入パイプ13を差し込んで、該樹脂
注入パイプ13の差し込み部の周囲に塗った接着剤14
により樹脂注入パイプ13を鋼板6に接着させてシール
させると共に、鋼板6の下端縁部をフーチング2の上面
に接着剤にて固定してシールさせるようにする。Along with the work of fixing the steel plate 6 with the countersunk bolt 7 described above, as shown in FIG. 11, the resin injection pipe 13 formed in the steel plate 6 has an insertion hole 10 made of aluminum and made of aluminum. Adhesive 14 applied by inserting the resin injection pipe 13 and coating the periphery of the insertion portion of the resin injection pipe 13.
Thus, the resin injection pipe 13 is adhered to the steel plate 6 for sealing, and the lower end edge of the steel plate 6 is fixed to the upper surface of the footing 2 with an adhesive for sealing.
【0008】上記の状態において、最下位に位置する周
方向所要個所の樹脂注入パイプ13に樹脂圧入ポンプを
接続して、樹脂注入パイプ13から鋼板6の内側の隙間
Sにエポキシ樹脂9を所要高さ位置まで注入し、注入し
たエポキシ樹脂9が硬化した後、同様に、その上方に位
置する所要の樹脂注入パイプ13を利用し、鋼板6の内
側の隙間Sにエポキシ樹脂9を注入して硬化させる作業
を繰り返すようにする。この場合、上記エポキシ樹脂9
が隙間Sに順次注入されて隙間Sを下方から上方へ埋め
て押し上げて行くとき、樹脂圧入ポンプを接続していな
い上方の樹脂注入パイプ13は空気抜きとして機能する
ため、注入レベルが上昇してくると、空気抜きとして機
能している樹脂注入パイプ13からエポキシ樹脂9が溢
れ出てくることになる。したがって、その溢れを検出す
ることによってエポキシ樹脂9の注入高さレベルを知る
ことができる。この際、エポキシ樹脂9が溢れ出た樹脂
注入パイプ13は折り曲げることによりシールし、樹脂
硬化後に切断することによって取り去り、切断部にパテ
を詰めてグラインダーで仕上げるようにしている。In the above state, the resin injection pump is connected to the resin injection pipe 13 at the lowest required position in the circumferential direction, and the epoxy resin 9 is applied to the gap S inside the steel plate 6 from the resin injection pipe 13 to the required height. After the epoxy resin 9 has been injected to a predetermined position and the epoxy resin 9 has been cured, the epoxy resin 9 is similarly injected into the gap S inside the steel plate 6 and cured using the required resin injection pipe 13 located above it. Try to repeat the work. In this case, the epoxy resin 9
When the resin is sequentially injected into the gap S and the gap S is filled from the lower side to the upper side and pushed up, the upper resin injection pipe 13 not connected to the resin press-fitting pump functions as an air bleeder, so that the injection level rises. Then, the epoxy resin 9 overflows from the resin injection pipe 13 functioning as an air vent. Therefore, the injection height level of the epoxy resin 9 can be known by detecting the overflow. At this time, the resin injection pipe 13 overflowing with the epoxy resin 9 is bent and sealed to be sealed, and the resin injection pipe 13 is removed by cutting after curing the resin, and the cut portion is filled with putty and finished with a grinder.
【0009】[0009]
【発明が解決しようとする課題】ところが、上記従来の
高架橋の脚柱補強方法の場合、鋼板6の内側に形成した
隙間Sへのエポキシ樹脂9の注入作業は、1回の注入工
程でできるだけ多くのエポキシ樹脂9を注入することが
作業能率を向上できる上で有利となるが、あまり多くの
エポキシ樹脂9を注入すると、隙間S内の圧力が過大に
なってアルミニウム製の樹脂注入パイプ13の接着剤1
4によるシール部からエポキシ樹脂9が漏れるおそれが
あるため、従来では、エポキシ樹脂を注入して3m程度
しか押し上げないようにして、上述したようにエポキシ
樹脂9の注入作業を上下方向で複数段階に分けて行うよ
うにして、隙間Sの圧力が過大とならないような状況下
で作業を進めているので、工期が長くなるという問題が
ある。However, in the case of the above-described conventional viaduct reinforcement method, the injection work of the epoxy resin 9 into the gap S formed inside the steel plate 6 is performed as much as possible in one injection step. It is advantageous to inject the epoxy resin 9 in order to improve the work efficiency, but if too much epoxy resin 9 is injected, the pressure in the gap S becomes excessive and the resin injection pipe 13 made of aluminum is bonded. Agent 1
Since there is a possibility that the epoxy resin 9 leaks from the seal portion due to 4, the conventional epoxy resin is injected by pushing only about 3 m, and as described above, the epoxy resin 9 is injected in multiple stages in the vertical direction. Since the work is carried out separately in such a manner that the pressure in the gap S does not become excessive, there is a problem that the construction period becomes long.
【0010】そこで、本発明は、隙間内へのエポキシ樹
脂の注入量を1回の工程でなるべく多くすることができ
るようにして工期の短縮化を図ることができるようにし
ようとするものである。Therefore, the present invention is intended to shorten the construction period by making it possible to increase the injection amount of the epoxy resin into the gap as much as possible in one step. .
【0011】[0011]
【課題を解決するための手段】本発明は、上記課題を解
決するために、所要のピッチでボルト挿通孔と空気抜き
パイプ螺合用のねじ孔を設けた鋼板を、補強すべき鉄筋
コンクリート製の脚柱の外周に、該脚柱外周面との間に
所要の隙間が形成されるように巻き付けて配置し、ボル
ト挿通孔を通して脚柱の外壁部にアンカー埋込穴を穿設
して、該アンカー埋込穴に雌ねじコンクリートアンカー
を埋め込み、該雌ねじコンクリートアンカーに、ボルト
挿通孔を通し皿ボルトを差し込んでねじ込むことによ
り、脚柱の外周に鋼板を固定し、次に、先端部を盲ナッ
トで塞げるようにしてある全ねじパイプ製の空気抜きパ
イプを、鋼板の上記ねじ孔にねじ込んで取り付け、しか
る後、鋼板の内側の隙間に対し、最下位に位置する所要
の空気抜きパイプを通してエポキシ樹脂を所要高さ位置
まで注入し、このとき、エポキシ樹脂の溢れが生じた空
気抜きパイプの先端部を盲ナットで塞いで行くように
し、注入したエポキシ樹脂が硬化した後、同様にその上
方に位置する所要の空気抜きパイプを通してエポキシ樹
脂を注入して硬化させる工程を繰り返すことにより隙間
を下から上へ埋めて行き、すべてのエポキシ樹脂が硬化
した後、上記空気抜きパイプを取り外してパテを詰めて
仕上げるようにする。In order to solve the above problems, the present invention provides a reinforced concrete pedestal for reinforcing a steel plate having a bolt insertion hole and a screw hole for screwing an air vent pipe at a required pitch. It is wound around the outer periphery of the pedestal so as to form a required gap with the outer peripheral surface of the pedestal, and an anchor embedding hole is bored in the outer wall portion of the pedestal through the bolt insertion hole, thereby the anchor embedding By embedding a female screw concrete anchor in the insertion hole, inserting a countersunk bolt through the bolt insertion hole and screwing it into the female screw concrete anchor, fix the steel plate to the outer periphery of the pedestal, then close the tip with a blind nut Attach the air-bleeding pipe made of all-threaded pipe in this way by screwing it into the above-mentioned screw hole of the steel plate, and then place the required air-bleeding pipe at the lowest position in the gap inside the steel plate. Then, inject the epoxy resin to the required height position.At this time, the tip of the air vent pipe where the epoxy resin overflows is closed with a blind nut, and after the injected epoxy resin has cured, The gap is filled from bottom to top by repeating the process of injecting epoxy resin through the required air vent pipe located above and curing it, and after all epoxy resin is cured, remove the air vent pipe and pack the putty. To finish.
【0012】又、雌ねじコンクリートアンカーに皿ボル
トをねじ込み、且つ全ねじパイプ製の空気抜きパイプを
通してエポキシ樹脂を注入することに代えて、雌ねじコ
ンクリートアンカーに寸切ボルトの一端側をねじ込んで
他端側を鋼板の外側に突出させた後、該寸切ボルトを鋼
板のボルト挿通孔の部分で全周溶接し、次に、上記寸切
ボルトを索状物受けに利用して鋼板の外周に索状物を多
段に巻き付けて締め付けるようにし、一方、予め、脚柱
の外壁面に、上下方向に延びる溝を設けて、該溝内に樹
脂注入用ホースを上から挿入しておき、該樹脂注入用ホ
ースを通して隙間にエポキシ樹脂を注入させるように
し、エポキシ樹脂の注入レベルに合わせて樹脂注入用ホ
ースを引き上げて行くようにするとよい。Further, instead of screwing a flat head bolt into a female threaded concrete anchor and injecting epoxy resin through an air vent pipe made of a fully threaded pipe, one end of a slicing bolt is screwed into a female threaded concrete anchor and the other end side is screwed in. After projecting to the outside of the steel plate, the shredded bolt is welded all around the bolt insertion hole portion of the steel plate, and then the shredded bolt is used as a rope receiving member on the outer circumference of the steel plate. Is to be wound in multiple stages for tightening, and on the other hand, a groove extending vertically is provided in advance on the outer wall surface of the pedestal, and a resin injecting hose is inserted into the groove from above, and the resin injecting hose is inserted. It is advisable to inject the epoxy resin into the gap through the through hole and to pull up the resin injecting hose according to the injection level of the epoxy resin.
【0013】[0013]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。図1は本発明の高架橋の脚柱補強
方法の実施の一形態を示すもので、図7乃至図11に示
したのと同様な高架橋の脚柱補強方法において、鋼板6
の内側の隙間Sにアルミニウム製の樹脂注入用パイプ1
3を通してエポキシ樹脂9の注入作業を行うことに代え
て、全ねじパイプ製の空気抜きパイプ16を通してエポ
キシ樹脂9の注入作業を行うようにする。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a method for reinforcing a viaduct column according to the present invention. In the same method for reinforcing a viaduct column as shown in FIGS. 7 to 11, a steel plate 6 is used.
The resin injection pipe 1 made of aluminum in the gap S inside the
Instead of performing the injection work of the epoxy resin 9 through 3, the injection work of the epoxy resin 9 is performed through the air vent pipe 16 made of all-threaded pipe.
【0014】詳述すると、上記脚柱3の外周に巻き付け
る鋼板6として、従来の方法で用いる図7に示した鋼板
6と同様に、周方向に4分割し且つ上下方向に2分割し
た如きセグメント形状として、所要のピッチ間隔でボル
ト挿通孔8を設け、且つ従来の鋼板6の樹脂注入パイプ
挿入用孔10に代えて、全長にわたりねじを設けた全ね
じパイプ製の空気抜きパイプ16を螺合させるための空
気抜きパイプ螺合用のねじ孔17を設け、更に、内面
に、隙間形成用の小さいスペーサ(図示せず)を多数取
り付けた構成のものを用いるようにする。More specifically, as the steel plate 6 to be wound around the outer periphery of the pedestal 3, as in the case of the steel plate 6 shown in FIG. 7 used in the conventional method, the segment is divided into four in the circumferential direction and two in the vertical direction. As a shape, bolt insertion holes 8 are provided at a required pitch interval, and instead of the resin injection pipe insertion holes 10 of the conventional steel plate 6, an air vent pipe 16 made of a full-threaded pipe having screws over the entire length is screwed. For this purpose, a screw hole 17 for screwing the air vent pipe is provided, and a large number of small spacers (not shown) for forming gaps are attached to the inner surface.
【0015】脚柱3の外周に鋼板6を巻き付けて補強す
る場合には、先ず、現場で、上下方向に2分割されてい
る鋼板6を溶接により一体化し、該一体化した各鋼板6
を、図8に示す如く脚柱3の外周に立てて仮り止めさせ
るようにする。この仮り止めには、鋼板6の最上位のボ
ルト挿通孔8を通してドリルにより脚柱3にアンカー埋
込穴11を穿設して雌ねじコンクリートアンカー12を
埋め込み、その雌ねじコンクリートアンカー12に上記
ボルト挿通孔8を通して仮り止め用のボルト(図示せ
ず)を締め込むようにする。鋼板6を仮り止めした後、
従来と同様に、鋼板6に穿設されている各ボルト挿通孔
8を利用して脚柱3の外壁部にアンカー埋込孔11を設
け、雌ねじコンクリートアンカー12を埋め込んだ後、
皿ボルト7をねじ込むことにより脚柱3の外周に鋼板6
を固定し、更に、周方向に4分割されている鋼板6の側
辺部同士を溶接して、鋼板6を筒状に一体化し、鋼板6
の内側に所定の隙間Sを形成させるようにする。なお、
この際、鋼板6の上端部を仮り止めしていた部分にも、
仮り止め用ボルトを外して皿ボルト7をねじ込むように
する。When the steel plate 6 is wound around the outer periphery of the pedestal 3 for reinforcement, first, the steel plates 6 which are vertically divided into two are integrated by welding at the site, and the integrated steel plates 6 are formed.
Is erected on the outer periphery of the pedestal 3 as shown in FIG. For this temporary fixing, an anchor embedding hole 11 is bored in the pedestal 3 by drilling through the uppermost bolt insertion hole 8 of the steel plate 6 to embed a female screw concrete anchor 12 into the female screw concrete anchor 12. Tighten a bolt (not shown) for temporary fixing through 8. After temporarily fixing the steel plate 6,
Similarly to the conventional method, each bolt insertion hole 8 formed in the steel plate 6 is used to provide an anchor embedding hole 11 in the outer wall portion of the pedestal 3, and after embedding the female screw concrete anchor 12,
The flat plate 6 is attached to the outer periphery of the pedestal 3 by screwing in the flat head bolt 7.
Is fixed, and the side portions of the steel plate 6 which is divided into four in the circumferential direction are welded to each other so that the steel plate 6 is integrated into a tubular shape.
A predetermined gap S is formed inside the. In addition,
At this time, even in the part where the upper end of the steel plate 6 is temporarily fixed,
Remove the temporary fixing bolt and screw in the flat head bolt 7.
【0016】次に、図1に示す如く、鋼板6の各空気抜
きパイプ螺合用のねじ孔17に全ねじパイプ製の空気抜
きパイプ16を螺合して取り付け、更に、鋼板6の下端
全周を、フーチング2の上面にシール剤によりシールさ
せるようにする。Next, as shown in FIG. 1, an air vent pipe 16 made of a fully threaded pipe is screwed into a screw hole 17 for screwing each air vent pipe of the steel plate 6, and further, the entire lower end of the steel plate 6 is attached. The upper surface of the footing 2 is sealed with a sealant.
【0017】かかる状態において、最下位に位置する周
方向所要個所の空気抜きパイプ16に樹脂圧入ポンプを
接続して、該空気抜きパイプ16を通して鋼板6の内側
の隙間Sに対しエポキシ樹脂9を所要高さ位置まで注入
し、注入したエポキシ樹脂9が硬化した後、同様に、そ
の上方に位置する所要の空気抜きパイプ16を利用し、
鋼板6の内側の隙間Sにエポキシ樹脂9を注入して硬化
させる工程を繰り返すようにする。この場合、上記エポ
キシ樹脂9が隙間Sに順次注入されて隙間Sを下方から
上方へ埋めて押し上げて行くとき、注入レベルが上昇し
てくると、樹脂圧入ポンプを接続していない上方の空気
抜きパイプ16からエポキシ樹脂9が溢れ出てくること
になるので、その溢れを検出することによってエポキシ
樹脂9の注入高さレベルを知ることができる。又、この
際、溢れが検出された空気抜きパイプ16には、図1に
おいて二点鎖線で示す如く、端部に盲ナット23を螺着
してシールさせるようにする。更に、すべてのエポキシ
樹脂9が硬化した後、上記空気抜きパイプ16を取り外
してパテを詰めて仕上げるようにする。In such a state, a resin press-fitting pump is connected to the air vent pipe 16 at the lowest required position in the circumferential direction, and the epoxy resin 9 is passed through the air vent pipe 16 to the clearance S inside the steel plate 6 at a required height. After injecting to the position and curing the injected epoxy resin 9, similarly, using the required air vent pipe 16 located above it,
The step of injecting the epoxy resin 9 into the gap S inside the steel plate 6 and hardening it is repeated. In this case, when the epoxy resin 9 is sequentially injected into the gap S and the gap S is filled from the lower side to the upper side and pushed up, when the injection level rises, the upper air vent pipe not connected to the resin press-fitting pump. Since the epoxy resin 9 overflows from 16, the injection height level of the epoxy resin 9 can be known by detecting the overflow. At this time, a blind nut 23 is screwed to the end of the air vent pipe 16 in which the overflow is detected, as shown by the chain double-dashed line in FIG. Further, after all the epoxy resin 9 has been hardened, the air vent pipe 16 is removed and putty is put to finish.
【0018】本発明においては、従来の樹脂注入パイプ
13に代えて、先端部に盲ナット23が取り付けられる
ようにした全ねじパイプ製の空気抜きパイプ16を、ね
じ孔17にねじ込んで取り付けるようにするため、鋼板
6の内側の隙間Sに従来よりも多くのエポキシ樹脂を注
入することにより隙間Sの圧力が高くなっても、エポキ
シ樹脂9が空気抜きパイプ16とねじ孔17との間や空
気抜きパイプ16の先端から漏れることはない。したが
って、エポキシ樹脂9の1回の注入工程で、従来では3
m程度の高さ位置までしか注入できなかったものが、5
m程度の高さ位置まで注入することができるようにな
り、作業工期を短縮することができる。又、空気抜きパ
イプ16は全ねじ切りパイプとして鋼板6にねじ込んで
取り付けるため、接着剤を用いることなくシール性が得
られ、しかも樹脂硬化後に取り外して次の現場に転用可
能であり、したがって、その都度切断していた従来のア
ルミニウム製の樹脂注入パイプ13を用いる場合に比し
てコスト的にも有利となる。In the present invention, instead of the conventional resin injection pipe 13, an air vent pipe 16 made of a fully threaded pipe having a blind nut 23 attached at its tip is screwed into a screw hole 17 to be attached. Therefore, even if the pressure in the gap S becomes higher by injecting more epoxy resin into the gap S inside the steel plate 6 than in the conventional case, the epoxy resin 9 is not removed between the air vent pipe 16 and the screw hole 17 or the air vent pipe 16. Does not leak from the tip of the. Therefore, in a single injection process of the epoxy resin 9, it is not necessary to use 3
What could only be injected up to a height of about m is 5
It becomes possible to inject to a height position of about m, and the work period can be shortened. Further, since the air vent pipe 16 is screwed into the steel plate 6 as a fully threaded pipe and attached, a sealing property can be obtained without using an adhesive, and it can be removed after the resin is cured and diverted to the next site. It is also advantageous in cost as compared with the conventional case where the resin injection pipe 13 made of aluminum is used.
【0019】次に、図2乃至図5は本発明の他の実施の
形態を示すもので、上記実施の形態で示した空気抜きパ
イプ16は空気抜き専用とし、且つ鋼板6の脚柱3への
固定は寸切ボルト15で行うようにし、鋼板6の内側に
形成保持させた上記隙間Sにエポキシ樹脂9を一気に注
入することにより、脚柱3に鋼板6を一体化させて脚柱
3を補強させるようにしたものである。Next, FIGS. 2 to 5 show another embodiment of the present invention. The air vent pipe 16 shown in the above embodiment is dedicated to air vent, and the steel plate 6 is fixed to the pedestal 3. Is performed with the slicing bolts 15, and the epoxy resin 9 is injected into the gap S formed and held inside the steel plate 6 all at once, so that the steel plate 6 is integrated with the pedestal 3 to reinforce the pedestal 3. It was done like this.
【0020】詳述すると、先ず、予め、補強すべき脚柱
3には、前段取りとして、図3に示す如く、たとえば、
3cm×3cm程度の深さ断面とした上下方向に延びる溝1
8を、外壁面部の周方向の等間隔位置(図3では90°
間隔位置)に設けるようにする。More specifically, first, the pedestal 3 to be reinforced is previously prepared as shown in FIG.
Groove 1 extending vertically with a depth of approximately 3 cm x 3 cm
8 at the circumferentially equally spaced positions on the outer wall surface (90 ° in FIG. 3).
It should be provided at the space position).
【0021】上記の状態において、周方向に4分割され
ている鋼板6を脚柱3の外周に立てて仮り止めボルトに
て仮り止めした後、図4に示す如く、各鋼板6の各ボル
ト挿通孔8を通してドリルにより脚柱3にアンカー埋込
穴11を穿設して、各アンカー埋込穴11に雌ねじコン
クリートアンカー12を埋め込み、次いで、寸切ボルト
15を、各ボルト挿通孔8を通して雌ねじコンクリート
アンカー12の内側にねじ込むようにする。この場合、
寸切ボルト15は、雌ねじコンクリートアンカー12に
ねじ込んでも鋼板6の外方へ所要量突出している長さの
ものを選定する。上記寸切ボルト15の雌ねじコンクリ
ートアンカー12内へのねじ込み作業と相前後して、図
2及び図3に示す如く、樹脂注入用ホース19を、脚柱
3の外壁面部に形成した上下方向の溝18の上端より該
溝18に沿わせて溝18の下端まで挿入する。In the above-mentioned state, the steel plate 6 which is divided into four in the circumferential direction is erected on the outer circumference of the pedestal 3 and temporarily fixed by the temporary fixing bolts, and then the bolts of the respective steel plates 6 are inserted as shown in FIG. Anchor embedding holes 11 are drilled through the holes 8 in the pedestal 3 and female thread concrete anchors 12 are embedded in each anchor embedding hole 11, and then a slicing bolt 15 is inserted through each bolt insertion hole 8 into the female thread concrete. It is screwed inside the anchor 12. in this case,
The slicing bolt 15 is selected to have such a length that it projects a required amount outward of the steel plate 6 even when it is screwed into the female screw concrete anchor 12. Before and after the screwing of the slicing bolt 15 into the female threaded concrete anchor 12, as shown in FIGS. 2 and 3, a resin injecting hose 19 is formed in a vertical groove formed on the outer wall surface of the pedestal 3. The groove 18 is inserted from the upper end of the groove 18 to the lower end of the groove 18 along the groove 18.
【0022】次に、周方向に4分割されている鋼板6の
側辺同士を溶接して鋼板6を筒状に一体化し、且つ図4
に示す如く各寸切ボルト15をボルト挿通孔8の部分で
全周溶接して接合部22を形成し、鋼板6を寸切ボルト
15によって脚柱3に固定し、鋼板6の内側に所定の隙
間Sを形成させるようにする。なお、この際、鋼板6の
上端部を仮り止めしていた部分にも、仮り止め用ボルト
を外して寸切ボルト7をねじ込み、同様に溶接接合させ
るようにする。Next, the side edges of the steel plate 6 which is divided into four in the circumferential direction are welded to each other to integrate the steel plate 6 into a tubular shape, and FIG.
As shown in FIG. 2, each slicing bolt 15 is welded all around the bolt insertion hole 8 to form a joint portion 22, and the steel plate 6 is fixed to the pedestal 3 by the slicing bolt 15 and is attached to the inside of the steel plate 6 at a predetermined position. The gap S is formed. At this time, the temporary fixing bolt is also removed to the portion where the upper end portion of the steel plate 6 is temporarily fixed, and the slicing bolt 7 is screwed in, and similarly welded.
【0023】次いで、図5に示す如く、鋼板6の外周部
にワイヤロープ、チエン等の如き索状物20を上下方向
多段に巻き付け、索状物20の両端部間にチェーンブロ
ック等の締付機21を介在させて、該締付機21の操作
によって索状物20を引張って鋼板6を締め付けるよう
にする。この際、索状物20を鋼板6の外周に巻き付け
るときの受け材として各段に位置する寸切ボルト15の
外方突出部を利用するようにする。これにより、索状物
20を斜めにすることなくほぼ水平に巻き付けることが
できて便利である。更に、鋼板6の各空気抜きパイプ螺
合用のねじ孔17に全ねじパイプ製の空気抜きパイプ1
6を螺合して取り付けるようにする。Next, as shown in FIG. 5, a rope 20 such as a wire rope or a chain is wound around the outer peripheral portion of the steel plate 6 in a vertical direction in multiple stages, and a chain block or the like is tightened between both ends of the rope 20. With the machine 21 interposed, the cord 20 is pulled by the operation of the tightening machine 21 to tighten the steel plate 6. At this time, the outward protruding portions of the slicing bolts 15 located at each step are used as a receiving material when the cord 20 is wound around the outer circumference of the steel plate 6. This is convenient because the cord 20 can be wound substantially horizontally without being inclined. Further, the air vent pipe 1 made of a fully threaded pipe is provided in the screw hole 17 for screwing each air vent pipe of the steel plate 6.
Attach 6 by screwing.
【0024】上記の状態において、鋼板6の内側に形成
されている隙間Sに、樹脂注入用ホース19を通してエ
ポキシ樹脂9を注入して充填させるようにする。この
際、隙間Sの下端部位置に注入されたエポキシ樹脂9の
注入レベルが上昇して行くと、下位に位置する空気抜き
パイプ16からエポキシ樹脂9が溢れ出てくるので、溢
れが検出された空気抜きパイプ16には、図1において
二点鎖線で示す如く、空気抜きパイプ2の端部に盲ナッ
ト23を螺着してシールさせるようにする。この空気抜
きパイプ16からのエポキシ樹脂9の溢れ状況を見るこ
とにより、隙間Sへのエポキシ樹脂9の注入レベルを監
視することができ、このエポキシ樹脂9の注入状況を監
視しながら、上記樹脂注入用ホース19を徐々に引き上
げて注入位置を上昇させて行くようにする。このように
して、隙間Sへのエポキシ樹脂9の注入を、上下方向全
高に亘り一連の作業として一気に行うようにする。In the above state, the epoxy resin 9 is injected into the gap S formed inside the steel plate 6 through the resin injection hose 19 so as to be filled. At this time, when the injection level of the epoxy resin 9 injected into the lower end portion of the gap S rises, the epoxy resin 9 overflows from the air vent pipe 16 located in the lower position, so the air vent for which the overflow is detected is vented. As shown by the chain double-dashed line in FIG. 1, a blind nut 23 is screwed onto the end of the air bleeding pipe 2 to seal the pipe 16. By checking the overflow status of the epoxy resin 9 from the air vent pipe 16, the injection level of the epoxy resin 9 into the gap S can be monitored, and while monitoring the injection status of the epoxy resin 9, The hose 19 is gradually pulled up to raise the injection position. In this way, the injection of the epoxy resin 9 into the gap S is performed all at once in a series over the entire height in the vertical direction.
【0025】この場合、隙間Sの全高に硬化していない
エポキシ樹脂9が注入されることになるため、隙間Sの
圧力が高くなって鋼板6は外方へ膨らもうとするが、本
実施の形態においては、索状物20が、寸切ボルト15
の上下方向配列ピッチに対応して鋼板6の外周に多段に
巻き付けて締め付けた状態としてあることから、索状物
20にて鋼板6の膨らみ力を抑えることができて、寸切
ボルト15に過大な負荷を作用させないようにすること
ができる。しかも、寸切ボルト15はボルト挿通孔8の
部分で鋼板6に全周溶接してあり、且つ空気抜きパイプ
16は鋼板6のねじ孔17にねじ込んで取り付けてある
ので、エポキシ樹脂9の注入圧力に対して取付部の強度
が高い。そのため、ボルト挿通孔8や空気抜きパイプ1
6の部分からエポキシ樹脂9が漏れることはなく、エポ
キシ樹脂9を脚柱3の全高に亘り一気に行うことができ
る。In this case, since the uncured epoxy resin 9 is injected to the entire height of the gap S, the pressure in the gap S increases and the steel plate 6 tries to bulge outward. In the form of FIG.
The swelling force of the steel plate 6 can be suppressed by the cords 20 and the slicing bolt 15 is excessively large because it is tightened by being wound around the outer periphery of the steel plate 6 in multiple stages corresponding to the vertical arrangement pitch of. It is possible to prevent the application of a heavy load. Moreover, since the shredded bolt 15 is welded all around the steel plate 6 at the portion of the bolt insertion hole 8 and the air vent pipe 16 is screwed into the screw hole 17 of the steel plate 6 to be attached, the injection pressure of the epoxy resin 9 is prevented. On the other hand, the strength of the mounting part is high. Therefore, the bolt insertion hole 8 and the air vent pipe 1
The epoxy resin 9 does not leak from the portion 6 and the epoxy resin 9 can be applied all at once over the entire height of the pedestal 3.
【0026】上述したようにして、鋼板6の内側の隙間
Sの全高に注入されたエポキシ樹脂9が硬化すると、鋼
板6に巻き付けていた索状物20を取り外す作業をし、
一方、各寸切ボルト15は、突出部を切断して、切断部
をグラインダーで仕上げるようにし、又、空気抜きパイ
プ16は、ねじ孔17から取り外した後にねじ孔17に
パテを詰めて仕上げるようにする。As described above, when the epoxy resin 9 injected to the entire height of the gap S inside the steel plate 6 hardens, the cord 20 wound around the steel plate 6 is removed,
On the other hand, each shredding bolt 15 cuts the protruding portion and finishes the cut portion with a grinder, and the air vent pipe 16 is finished by removing the screw hole 17 from the screw hole 17 and filling the screw hole 17 with putty. To do.
【0027】このように、鋼板6の外周を索状物20で
締め付けた状態として、鋼板6の内側に形成した隙間S
の全高にエポキシ樹脂9を一気に注入して硬化させるよ
うにするので、従来のように、エポキシ樹脂9の注入作
業を上下方向で複数段階に分けて行う場合に比して作業
能率を向上できることにより工期を短縮することができ
る。この際、上記索状物20の巻き付けには、鋼板6を
脚柱3に直接固定するための寸切ボルト15を索状物2
0の受け材として利用するので、索状物20を鋼板6の
外周に巻くためのピースを別途に設ける必要のない点で
も作業能率の上で有利である。In this way, with the outer periphery of the steel plate 6 tightened with the cords 20, the gap S formed inside the steel plate 6 is formed.
Since the epoxy resin 9 is injected all at once to be cured, the work efficiency can be improved as compared with the conventional case where the epoxy resin 9 is injected in a plurality of steps in the vertical direction. The construction period can be shortened. At this time, when the cord 20 is wound, a slicing bolt 15 for directly fixing the steel plate 6 to the pedestal 3 is used.
Since it is used as a receiving member for 0, there is no need to separately provide a piece for winding the cord 20 around the outer circumference of the steel plate 6, which is advantageous in terms of work efficiency.
【0028】又、上記寸切ボルト15は雌ねじコンクリ
ートアンカー12にねじ込んだ後、ボルト挿通孔8の部
分で全周溶接して鋼板6に固定するので、シール性を維
持させることができて、従来のように、アンカー埋込穴
11の穿設作業に必要以上神経を使うことはない。すな
わち、コンクリートアンカー12を埋め込むためのアン
カー埋込穴11を穿設する作業はドリルを用いた手作業
となることから、穿設誤差によりアンカー埋込穴11が
鋼板6の表面に対して直角にならないことがあり、その
ため、雌ねじコンクリートアンカー12に皿ボルト7を
差し込んでねじ込んだときに、皿ボルト7の頭部表面と
鋼板6の表面とが面一にならずに皿ボルト7の頭部が鋼
板6の表面に斜めの状態に飛び出す事態が生じてしまう
ことがある。このような事態が発生すると、ボルト挿通
孔8を通ってエポキシ樹脂9が漏れてしまうので、従来
では、ボルト挿通孔8と皿ボルト7の頭部との間の隙間
を埋めるようにボルト挿通孔8内を溶接し、しかる後、
ボルト挿通孔8の溶接による肉盛部分の余剰分を鋼板6
の表面に倣ってグラインダーにより削り取るようにして
いる。したがって、アンカー埋込穴11の穿設作業に非
常に細かい神経を要することになって作業能率が悪くな
るという問題があったが、上述したようにする寸切ボル
ト15を採用することにより、たとえ、アンカー埋込穴
11が多少斜めに穿設されたとしても何ら支障はない。
したがって、アンカー埋込穴11の穿設作業を能率よく
行うことができる。更に、寸切ボルト15をボルト挿通
孔8に全周溶接することに伴って、寸切ボルト15の耐
圧強度を確保できるため、従来の皿ボルト7を用いる場
合に比して取付ピッチを拡げることが可能となり、その
分、寸切ボルト15の本数を少なくすることができる。Further, the threaded bolt 15 is screwed into the female threaded concrete anchor 12, and then welded all around the bolt insertion hole 8 to be fixed to the steel plate 6, so that the sealing property can be maintained and the conventional structure can be maintained. As described above, the nerve is not used more than necessary for the work of forming the anchor embedding hole 11. That is, since the work of drilling the anchor embedding hole 11 for embedding the concrete anchor 12 is a manual work using a drill, the anchor embedding hole 11 is perpendicular to the surface of the steel plate 6 due to a drilling error. Therefore, when the countersunk bolt 7 is inserted into the female screw concrete anchor 12 and screwed in, the head surface of the countersunk bolt 7 and the surface of the steel plate 6 do not become flush with each other, and the head of the countersunk bolt 7 is not flush with each other. There may be a case where the surface of the steel plate 6 pops out in an oblique state. When such a situation occurs, the epoxy resin 9 leaks through the bolt insertion hole 8. Therefore, conventionally, the bolt insertion hole 8 is filled so as to fill the gap between the bolt insertion hole 8 and the head of the flat head bolt 7. Weld the inside of 8, and after that,
Excessive surplus of the welded portion of the bolt insertion hole 8 is applied to the steel plate 6
It grinds with a grinder following the surface of. Therefore, there is a problem that the work of drilling the anchor embedding hole 11 requires a very fine nerve and the work efficiency deteriorates. However, by adopting the sizing bolt 15 as described above, Even if the anchor embedding hole 11 is formed in a slightly inclined manner, there is no problem.
Therefore, the work of forming the anchor embedding hole 11 can be efficiently performed. Further, since the crushing bolt 15 is welded to the bolt insertion hole 8 all around, the pressure resistance of the crushing bolt 15 can be secured. Therefore, the mounting pitch can be expanded as compared with the case of using the conventional countersunk bolt 7. Therefore, the number of the cut bolts 15 can be reduced accordingly.
【0029】[0029]
【発明の効果】以上述べた如く、本発明の高架橋の脚柱
補強方法によれば、次の如き優れた効果を発揮する。
(1) 従来のアルミニウム製の樹脂注入パイプに代えて、
鋼板に設けたねじ孔に、全ねじパイプ製とした空気抜き
パイプをねじ込んで取り付けるので、接着剤によるシー
ルを行うことなしにエポキシ樹脂の漏れを防止すること
ができると共に、樹脂の注入圧力に対して充分な強度を
持たせることができて、上記のエポキシ樹脂の注入高さ
を高くすることができることから、工期の短縮化を図る
ことができ、又、エポキシ樹脂硬化後は空気抜きパイプ
は取り外して転用を行うことができるので、経済的にも
有利である。
(2) 脚柱の外周に鋼板を巻き付けて固定するときに、鋼
板のボルト挿通孔から脚柱に穿設したアンカー埋込穴に
雌ねじコンクリートアンカーを埋め込み、この雌ねじコ
ンクリートアンカーの内側に、長さの長い寸切ボルトを
ボルト挿通孔を通してねじ込んだ後にボルト挿通孔の部
分に全周溶接させるようにするので、従来の皿ボルトを
用いる場合に比して、シール性及び耐圧性が得られ、し
たがって、アンカー埋込穴が多少傾斜していても何ら支
障はないため、アンカー埋込穴の穿設作業に神経を使う
必要がなくて作業能率を向上でき、又、鋼板の外周に索
状物を巻き付けることにより鋼板を補強すると共に、予
め、脚柱の外壁面に上下方向に延びる溝を設けておき、
この溝内に挿入した樹脂注入用ホースを通して隙間全高
へのエポキシ樹脂注入作業を一気に行うようにすること
により、注入作業を楽に行うことができて工期の大幅な
短縮化を図ることができ、しかも索状物の巻き付けは寸
切ボルトの突出部を受け材として利用できることから、
索状物を受けるためのピースを別途に用意する必要がな
い点で有利である。As described above, according to the method for reinforcing pillars of viaducts of the present invention, the following excellent effects are exhibited. (1) Instead of the conventional resin injection pipe made of aluminum,
Since the air vent pipe made of all-threaded pipe is screwed into the screw hole provided in the steel plate, it is possible to prevent the epoxy resin from leaking without sealing with an adhesive, Since it can have sufficient strength and the injection height of the above epoxy resin can be increased, the construction period can be shortened, and the air vent pipe can be removed and diverted after the epoxy resin is cured. Is also economically advantageous. (2) When winding and fixing a steel plate around the outer periphery of the pedestal, embed a female screw concrete anchor in the anchor embedding hole drilled in the pedestal from the bolt insertion hole of the steel plate, and insert the length inside the female screw concrete anchor. Since the long shredded bolt is screwed through the bolt insertion hole and then welded all around the bolt insertion hole, sealing performance and pressure resistance can be obtained as compared with the case of using a conventional countersunk bolt. Since there is no hindrance even if the anchor embedding hole is slightly inclined, it is not necessary to use nerves for drilling the anchor embedding hole, and work efficiency can be improved. The steel plate is reinforced by winding it, and a groove extending vertically is provided in advance on the outer wall surface of the pillar.
By injecting the epoxy resin into the entire gap at once through the resin injecting hose inserted in this groove, the injecting operation can be performed easily and the construction period can be greatly shortened. Since the protrusion of the slicing bolt can be used as a material for winding a cord,
This is advantageous in that it is not necessary to separately prepare a piece for receiving the cord.
【図1】本発明の高架橋の脚柱補強方法の実施の一形態
を示すもので、空気抜きパイプの取付状態を示す拡大断
面図である。FIG. 1 is an enlarged cross-sectional view showing an embodiment of a method of reinforcing a pillar of a viaduct of the present invention, showing an attached state of an air vent pipe.
【図2】本発明の他の実施の形態を示す全体の概略図で
ある。FIG. 2 is an overall schematic diagram showing another embodiment of the present invention.
【図3】図2のIII−III拡大矢視図である。FIG. 3 is an enlarged view taken along the line III-III in FIG.
【図4】寸切ボルトの取付状態を示す拡大断面図であ
る。FIG. 4 is an enlarged cross-sectional view showing a mounting state of a dimensional cut bolt.
【図5】鋼板の外周に索状物を巻き付けた状態の概要図
である。FIG. 5 is a schematic view of a state in which a cord is wound around the outer circumference of a steel plate.
【図6】高架橋の一例を示す概要図である。FIG. 6 is a schematic view showing an example of a high bridge.
【図7】従来における脚柱補強方法に用いる鋼板の展開
図である。FIG. 7 is a development view of a steel plate used in a conventional stanchion reinforcing method.
【図8】従来における脚柱補強方法の一例を示す全体図
である。FIG. 8 is an overall view showing an example of a conventional pedestal reinforcement method.
【図9】図8のIX−IX拡大矢視図である。FIG. 9 is an enlarged view taken along the line IX-IX in FIG.
【図10】皿ボルトで鋼板を固定する従来の方法を示す
拡大断面図である。FIG. 10 is an enlarged cross-sectional view showing a conventional method of fixing a steel plate with countersunk bolts.
【図11】樹脂注入パイプを鋼板に取り付ける従来の方
法を示す拡大断面図である。FIG. 11 is an enlarged cross-sectional view showing a conventional method of attaching a resin injection pipe to a steel plate.
【符号の説明】 3 脚柱 6 鋼板 8 ボルト挿通孔 9 エポキシ樹脂 11 アンカー埋込穴 12 雌ねじコンクリートアンカー 15 寸切ボルト 16 空気抜きパイプ 17 ねじ孔 20 索状物 23 盲ナット S 隙間[Explanation of symbols] 3 pedestals 6 steel plate 8 bolt insertion holes 9 Epoxy resin 11 Anchor embedding hole 12 Female thread concrete anchor 15 Threaded bolt 16 Air vent pipe 17 screw holes 20 cords 23 blind nut S gap
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) E01D 22/00 E01D 19/02 E04G 23/02 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) E01D 22/00 E01D 19/02 E04G 23/02
Claims (2)
パイプ螺合用のねじ孔を設けた鋼板を、補強すべき鉄筋
コンクリート製の脚柱の外周に、該脚柱外周面との間に
所要の隙間が形成されるように巻き付けて配置し、ボル
ト挿通孔を通して脚柱の外壁部にアンカー埋込穴を穿設
して、該アンカー埋込穴に雌ねじコンクリートアンカー
を埋め込み、該雌ねじコンクリートアンカーに、ボルト
挿通孔を通し皿ボルトを差し込んでねじ込むことによ
り、脚柱の外周に鋼板を固定し、次に、先端部を盲ナッ
トで塞げるようにしてある全ねじパイプ製の空気抜きパ
イプを、鋼板の上記ねじ孔にねじ込んで取り付け、しか
る後、鋼板の内側の隙間に対し、最下位に位置する所要
の空気抜きパイプを通してエポキシ樹脂を所要高さ位置
まで注入し、このとき、エポキシ樹脂の溢れが生じた空
気抜きパイプの先端部を盲ナットで塞いで行くように
し、注入したエポキシ樹脂が硬化した後、同様にその上
方に位置する所要の空気抜きパイプを通してエポキシ樹
脂を注入して硬化させる工程を繰り返すことにより隙間
を下から上へ埋めて行き、すべてのエポキシ樹脂が硬化
した後、上記空気抜きパイプを取り外してパテを詰めて
仕上げることを特徴とする高架橋の脚柱補強方法。1. A steel plate having a bolt insertion hole and a screw hole for screwing an air vent pipe at a required pitch is provided on the outer periphery of a reinforced concrete pedestal to be reinforced, and a required clearance is provided between the stud and the outer peripheral surface thereof. Are arranged so as to form an anchor embedding hole in the outer wall portion of the pedestal through the bolt insertion hole, the female screw concrete anchor is embedded in the anchor embedding hole, and the bolt is inserted into the female screw concrete anchor. The steel plate is fixed to the outer periphery of the pedestal by inserting the countersunk bolt through the insertion hole and screwing it in, and then the air vent pipe made of all-threaded pipe whose tip is closed with a blind nut is Screw it into the screw hole to attach it, and then inject the epoxy resin to the required height position through the required air vent pipe at the lowest position in the gap inside the steel plate. When the epoxy resin overflows, close the tip of the air vent pipe with a blind nut so that the injected epoxy resin has hardened, and then inject the epoxy resin through the required air vent pipe located above it. A method of reinforcing a pillar of a high bridge, characterized in that the gap is filled from the bottom to the top by repeating the curing step, and after all the epoxy resin is cured, the air vent pipe is removed and putty is filled.
をねじ込み、且つ全ねじパイプ製の空気抜きパイプを通
してエポキシ樹脂を注入することに代えて、雌ねじコン
クリートアンカーに寸切ボルトの一端側をねじ込んで他
端側を鋼板の外側に突出させた後、該寸切ボルトを鋼板
のボルト挿通孔の部分で全周溶接し、次に、上記寸切ボ
ルトを索状物受けに利用して鋼板の外周に索状物を多段
に巻き付けて締め付けるようにし、一方、予め、脚柱の
外壁面に、上下方向に延びる溝を設けて、該溝内に樹脂
注入用ホースを上から挿入しておき、該樹脂注入用ホー
スを通して隙間にエポキシ樹脂を注入させるようにし、
エポキシ樹脂の注入レベルに合わせて樹脂注入用ホース
を引き上げて行くようにする請求項1記載の高架橋の脚
柱補強方法。2. Instead of screwing a flat head bolt into an internally threaded concrete anchor and injecting epoxy resin through an air vent pipe made of a fully threaded pipe, one end of a threaded bolt is screwed into the internally threaded concrete anchor and the other end is After projecting to the outside of the steel plate, the shredded bolt is welded all around the bolt insertion hole portion of the steel plate, and then the shredded bolt is used as a rope receiving member on the outer circumference of the steel plate. Is to be wound in multiple stages for tightening, and on the other hand, a groove extending vertically is provided in advance on the outer wall surface of the pedestal, and a resin injecting hose is inserted into the groove from above, and the resin injecting hose is inserted. Through so that the epoxy resin is injected into the gap,
The method for reinforcing a pillar of a high bridge according to claim 1, wherein the resin injection hose is pulled up in accordance with the injection level of the epoxy resin.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34902095A JP3513784B2 (en) | 1995-12-21 | 1995-12-21 | How to reinforce pillars of viaduct |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34902095A JP3513784B2 (en) | 1995-12-21 | 1995-12-21 | How to reinforce pillars of viaduct |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09170203A JPH09170203A (en) | 1997-06-30 |
JP3513784B2 true JP3513784B2 (en) | 2004-03-31 |
Family
ID=18400953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP34902095A Expired - Lifetime JP3513784B2 (en) | 1995-12-21 | 1995-12-21 | How to reinforce pillars of viaduct |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3513784B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013155576A (en) * | 2012-01-31 | 2013-08-15 | East Japan Railway Co | Structure for reinforcing bridge pier and method for reinforcing the same |
DE102014214473A1 (en) * | 2014-07-24 | 2016-01-28 | Cbp Guideway Systems Gmbh | Reinforcement arrangement for a building and method for reinforcing a structure with such a reinforcement arrangement |
CN107386123A (en) * | 2017-08-14 | 2017-11-24 | 中铁六局集团有限公司 | A kind of box beam reserves anchor cable hole construction method |
JP7519945B2 (en) * | 2021-03-26 | 2024-07-22 | 公益財団法人鉄道総合技術研究所 | Reinforcement method for concrete structures and reinforced structures |
-
1995
- 1995-12-21 JP JP34902095A patent/JP3513784B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH09170203A (en) | 1997-06-30 |
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