JP2774017B2 - Segment bolt connection structure - Google Patents
Segment bolt connection structureInfo
- Publication number
- JP2774017B2 JP2774017B2 JP4109928A JP10992892A JP2774017B2 JP 2774017 B2 JP2774017 B2 JP 2774017B2 JP 4109928 A JP4109928 A JP 4109928A JP 10992892 A JP10992892 A JP 10992892A JP 2774017 B2 JP2774017 B2 JP 2774017B2
- Authority
- JP
- Japan
- Prior art keywords
- insertion hole
- bolt
- bolt insertion
- support plate
- 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 - Fee Related
Links
Landscapes
- Lining And Supports For Tunnels (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明はトンネル覆工用の鉄筋
コンクリートセグメントのボルト接合部構造に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt joint structure of a reinforced concrete segment for tunnel lining.
【０００２】[0002]
【従来の技術と発明が解決しようとする課題】セグメン
トの接合部構造には種々の構造が開発されている。そし
て多く実施されている構造に、接合部に支圧板１とボル
ト挿通孔を設け、ボルト挿通孔にボルトを挿通しナット
を螺合して緊締する構造がある。この構造では支圧板の
ボルト挿通孔の径Ｄ１よりコンクリート中のボルト挿通
孔またはボルト挿通孔を形成するパイプの内径Ｄ２を約
２mm程度大きくして、パイプ内径の誤差または支圧板の
ボルト挿通孔とコンクリート中のボルト挿通孔の生産時
に生ずる芯のずれに対処している。（図４参照）ところ
で近年自働組立機械を使用してボルトの挿通作業を実施
するようになってきて前記支圧板とコンクリートのボル
ト挿通孔間に生ずる段差が人手では操作によって支障な
かったのに対し、機械作業ではボルトのねじが引掛かり
その状態で強力に押込むので損傷に至ることがある。2. Description of the Related Art Various structures have been developed for the joint structure of segments. In a structure that is often implemented, there is a structure in which a support plate 1 and a bolt insertion hole are provided at a joint portion, a bolt is inserted into the bolt insertion hole, and a nut is screwed together to tighten. In this structure, the inner diameter D2 of the bolt insertion hole in the concrete or the pipe forming the bolt insertion hole is made larger by about 2 mm than the diameter D1 of the bolt insertion hole of the support plate, and the error of the pipe inner diameter or the bolt insertion hole of the support plate is increased. It addresses the displacement of the core that occurs during the production of bolt insertion holes in concrete. (See FIG. 4) By the way, in recent years, bolt insertion work has been carried out using an automatic assembling machine, and the step formed between the supporting plate and the concrete bolt insertion hole has not been hindered by manual operation. On the other hand, in the mechanical work, the bolt screw is caught and is pushed strongly in that state, which may lead to damage.
【０００３】そこで支圧板のボルト挿通孔の内側を面取
りＲ加工してボルト挿通孔をラッパ状に形成する構造が
考えられた。しかし支圧板に複数のボルト挿通孔を有す
る場合（図５参照）、相当の重量がある支圧板を製造時
に型枠Ｆ内に複数のピンＰでセットするが、ボルト挿通
孔芯間隔に誤差あり、支圧プレートをラッパ状としても
型枠に取付けたピンと支圧板のボルト挿通孔の相互に誤
差の生ずることは避けにくい。そして支圧板と型枠のボ
ルト孔間隔に誤差があると固定用ピンが通せなかった
り、通せても所定位置までささらない。すなわちテーパ
状の所で支圧板を押え込むためには、正確に穴中心に通
す必要がある。そこで固定用ピンの先端部径を支圧板の
孔径より例えば０．５ｍｍ程度細くしておけば、支圧板
のボルト孔間隔の誤差が０．５ｍｍまでは固定ピンも所
定位置までさすことが出来る。 この発明は前記事情に
鑑み、ボルト挿通孔とボルトとの間で誤差を吸収しうる
構造を開発したものである。Therefore, a structure has been considered in which the inside of the bolt insertion hole of the support plate is chamfered and rounded to form the bolt insertion hole in a trumpet shape. However, when the supporting plate has a plurality of bolt insertion holes (see FIG. 5), the supporting plate having a considerable weight is set with the plurality of pins P in the formwork F at the time of manufacture, but there is an error in the bolt insertion hole core spacing. Even if the supporting plate is formed in a trumpet shape, it is difficult to avoid an error between the pin mounted on the mold and the bolt insertion hole of the supporting plate. If there is an error in the distance between the supporting plate and the bolt hole between the support plate and the formwork, the fixing pin cannot be passed, or even if it can be passed, it does not reach the predetermined position. That is, in order to press down the support plate at the tapered place, it is necessary to pass the support plate accurately through the center of the hole. Therefore, if the tip diameter of the fixing pin is made smaller than the hole diameter of the supporting plate by, for example, about 0.5 mm, the fixing pin can also reach the predetermined position until the error of the bolt hole interval of the supporting plate is 0.5 mm. In view of the above circumstances, the present invention has developed a structure capable of absorbing an error between a bolt insertion hole and a bolt.
【０００４】[0004]
【課題を解決するための手段】この発明は支圧板の内側
に、支圧板のボルト挿通孔の内径より僅かに大きいボル
ト挿通孔を有し、前記ボルト挿通孔に挿通するととも
に、端部にナットが螺合されるボルトを設けたセグメン
トのボルト接合部構造において、１番目の発明は支圧板
の内側にパイプがコンクリート中に配置され、ボルトの
ねじ部の谷に非連続のリング状弾性体が嵌められてパイ
プのボルト挿通孔とボルトねじ山との間に小間隙を保持
するようにしてある。また２番目の発明では前記パイプ
に代えてボルト挿通孔を支圧板側が小径となるテーパ状
としてある。また３番目の発明では前記パイプには外方
に広がって膨出する収納溝を形成してあり、その収納溝
にリング状弾性体が嵌合されている。そして何れもボル
トがボルト挿通孔のほぼ中央に位置させうるようにした
構造である。According to the present invention, a bolt insertion hole slightly larger than the inner diameter of the bolt insertion hole of the support plate is provided inside the support plate, and the bolt is inserted into the bolt insertion hole and a nut is provided at the end. In the first aspect of the present invention, a pipe is disposed in concrete inside a supporting plate, and a discontinuous ring-shaped elastic body is provided in a valley of a screw portion of the bolt. It is fitted so as to maintain a small gap between the bolt insertion hole of the pipe and the bolt thread. Further, in the second invention, instead of the pipe, the bolt insertion hole has a tapered shape in which the diameter of the supporting plate side is small. In the third aspect of the present invention, the pipe is formed with a storage groove which expands outward and swells, and a ring-shaped elastic body is fitted in the storage groove. Each of them has a structure in which the bolt can be positioned substantially at the center of the bolt insertion hole.
【０００５】[0005]
【実施例】実施例１ 図１において接合すべき鉄筋コンクリートセグメントＡ
の接合端面の近くにボルト締め用凹溝となるブロックア
ウトＢが形成されている。このブロックアウトＢの内壁
に添って鋼板からなる支圧板１が設けてあり、この支圧
板１のボルト挿通孔２が形成してあり、支圧板１の内側
にボルト挿通孔２の内径より僅か、例えば２mm程度大き
い内径のボルト挿通孔３を有するパイプ４がコンクリー
ト中に配置されている。そして前記ボルト挿通孔２，３
に挿通するとともに、端部にナット５が螺合されるボル
ト６のねじ部の谷にはプラスチック、またはゴム等から
なる非連続のリング状弾性体７が嵌めてあり、パイプ４
のボルト挿通孔３とボルト６のねじ山との間に小間隙を
保持し、ボルト６がボルト挿通孔２，３のほぼ中央に位
置させうるようにしてある。なお具体例の一例としては
ボルト６の直径は３９mm、支圧板１のボルト挿通孔２７
の内径は４０mm、パイプ４のボルト挿通孔３の内径は４
2.２mmである。またこのボルト６の接合は摩擦接合とな
る。EXAMPLE 1 Reinforced concrete segment A to be joined in FIG.
A block-out B is formed near the joint end surface of the above as a bolting groove. A support plate 1 made of a steel plate is provided along the inner wall of the block-out B, and a bolt insertion hole 2 of the support plate 1 is formed. The inside of the support plate 1 is slightly smaller than the inner diameter of the bolt insertion hole 2. For example, a pipe 4 having a bolt insertion hole 3 having an inner diameter about 2 mm larger is arranged in concrete. And the bolt insertion holes 2 and 3
A non-continuous ring-shaped elastic body 7 made of plastic, rubber, or the like is fitted into a valley of a thread portion of a bolt 6 to which a nut 5 is screwed at an end.
A small gap is held between the bolt insertion hole 3 and the screw thread of the bolt 6 so that the bolt 6 can be positioned substantially at the center of the bolt insertion holes 2 and 3. As a specific example, the diameter of the bolt 6 is 39 mm, and the bolt insertion hole 27 of the support plate 1 is provided.
Has an inner diameter of 40 mm, and the inner diameter of the bolt insertion hole 3 of the pipe 4 is 4 mm.
2.2 mm. The joining of the bolts 6 is friction joining.
【０００６】実施例２ 図２において、この実施例は前記実施例１のパイプ４が
なく、ボルト挿通孔２がコンクリート中に形成され、し
かもそのボルト挿通孔２は支圧板１側が小径となるよ
う、例えば1/100 の勾配をもったテーパー状に形成して
ある。ボルト６のねじ部に非連続のリング状弾性体７を
嵌めてある等の構成は前記実施例と同様である。Embodiment 2 Referring to FIG. 2, this embodiment does not include the pipe 4 of the first embodiment, but has a bolt insertion hole 2 formed in concrete, and the bolt insertion hole 2 has a small diameter on the supporting plate 1 side. For example, it is formed in a tapered shape having a gradient of 1/100. The configuration in which a discontinuous ring-shaped elastic body 7 is fitted in the threaded portion of the bolt 6 is the same as in the above-described embodiment.
【０００７】すなわち支圧板１の内側に、支圧板１のボ
ルト挿通孔２の内径より僅かに大きい内径のボルト挿通
孔３をコンクリート中に形成し、かつそのボルト挿通孔
３を支圧板側が小径となるようテーパ状に形成され、前
記ボルト挿通孔に挿通するとともに、端部にナット５が
螺合されるボルト６のねじ部の谷に非連続のリング状弾
性体７が嵌められて前記テーパー状のボルト挿通孔とボ
ルトねじ山との間に小間隙を保持し、ボルト６がボルト
挿通孔のほぼ中央に位置するようにしてある。なお非連
続のリング状弾性体７は一箇所で分離しており、非連続
のリング状をなしている。That is, inside the support plate 1, a bolt insertion hole 3 having an inner diameter slightly larger than the inner diameter of the bolt insertion hole 2 of the support plate 1 is formed in concrete, and the bolt insertion hole 3 has a small diameter on the support plate side. A non-continuous ring-shaped elastic body 7 is fitted in a valley of a threaded portion of a bolt 6 to which a nut 5 is screwed at an end, and is formed in a tapered shape. A small gap is held between the bolt insertion hole and the bolt screw thread so that the bolt 6 is located substantially at the center of the bolt insertion hole. Note that the discontinuous ring-shaped elastic body 7 is separated at one place, and has a discontinuous ring shape.
【０００８】図３においてこの実施例は前記実施例１の
パイプ４に中間に外方に広がって膨出するリング状弾性
体７の収納溝８が形成したパイプがコンクリート中に配
置してあり、このリング状弾性体７によってパイプ４と
ボルト６との間に小間隙を保持するように構成されてお
り、その他の構成は前記実施例と同様である。なおリン
グ状弾性体７の断面は半円形状とすれば、ボルト６の挿
入を容易としてある。支圧板１の内側に、支圧板１のボ
ルト挿通孔２の内径より僅かに大きい内径のボルト挿通
孔３を有し、かつ中間に外方に広がって膨出する収納溝
８を形成したパイプがコンクリート中に配置され、前記
ボルト挿通孔に挿通するとともに、端部にナット５が螺
合されるボルト６に、前記収納溝８に嵌合されたリング
状弾性体７が嵌められて、パイプのボルト挿通孔とボル
トねじ山との間に小間隙を保持し、ボルトがボルト挿通
孔のほぼ中央に位置するようにしてある。In FIG. 3, in this embodiment, a pipe in which a storage groove 8 of a ring-shaped elastic body 7 which expands outward and expands in the middle in the middle of the pipe 4 of the first embodiment is arranged in concrete. The ring-shaped elastic body 7 is configured to maintain a small gap between the pipe 4 and the bolt 6, and the other configuration is the same as that of the above embodiment. If the cross section of the ring-shaped elastic body 7 is formed in a semicircular shape, the bolt 6 can be easily inserted. Inside the support plate 1, a pipe having a bolt insertion hole 3 having an inner diameter slightly larger than the inner diameter of the bolt insertion hole 2 of the support plate 1 and having a storage groove 8 which expands outward and swells in the middle is formed. A ring-shaped elastic body 7 fitted in the storage groove 8 is fitted to a bolt 6 which is arranged in concrete and is inserted into the bolt insertion hole and a nut 5 is screwed to an end thereof, thereby forming a pipe. A small gap is maintained between the bolt insertion hole and the bolt thread so that the bolt is located substantially at the center of the bolt insertion hole.
【０００９】[0009]
【発明の効果】この発明は以上の構成からなり、リング
状弾性体は支圧板の内側でパイプ内またはボルト挿通孔
内にあって支圧板のボルト挿通孔とパイプのボルト挿通
孔またはコンクリート中のボルト挿通孔との間に仮に段
差があってもボルト挿通孔とそこに挿入するボルトの間
に小間隙を保持し、ボルトがボルト挿通孔のほぼ中央に
位置しうるので寸法誤差を吸収できる。したがってボル
トの挿入作業を自動機械化しても支障なく作業ができ、
しかも支圧板の内側にリング状弾性体があって外れる恐
れがない。According to the present invention, the ring-shaped elastic member is provided in the pipe or the bolt insertion hole inside the support plate and the bolt insertion hole of the support plate and the bolt insertion hole of the pipe or concrete. Even if there is a step between the bolt insertion hole and the bolt insertion hole, a small gap is maintained between the bolt insertion hole and the bolt to be inserted therein, and the dimensional error can be absorbed because the bolt can be located substantially at the center of the bolt insertion hole. Therefore, even if the bolt insertion work is automatically mechanized, the work can be performed without trouble.
In addition, there is no danger of the ring-shaped elastic body being removed inside the supporting plate.
【図１】第１実施例の断面図である。FIG. 1 is a sectional view of a first embodiment.
【図２】第２実施例の断面図である。FIG. 2 is a sectional view of a second embodiment.
【図３】第３実施例の断面図である。FIG. 3 is a sectional view of a third embodiment.
【図４】従来例(a) は全体断面図、(b)(c)は要部の断面
図である。4A is a cross-sectional view of a conventional example, and FIGS. 4B and 4C are cross-sectional views of main parts.
【図５】セグメントの製造過程の要部の断面図である。FIG. 5 is a sectional view of a main part in a manufacturing process of the segment.
Ａ…セグメント、Ｂ…ブロックアウト １…支圧板、２…ボルト挿通孔、３…ボルト挿通孔、４
…パイプ、５…ナット、６…ボルト、７…リング状弾性
体。A: Segment, B: Block-out 1: Support plate, 2: Bolt insertion hole, 3: Bolt insertion hole, 4
... pipe, 5 ... nut, 6 ... bolt, 7 ... ring-shaped elastic body.
───────────────────────────────────────────────────── フロントページの続き (73)特許権者 000230010 ジオスター株式会社 東京都港区芝４丁目２番３号 (73)特許権者 000112749 フジミ工研株式会社 東京都千代田区飯田橋３丁目11番18号 (72)発明者 塩井 幸武 東京都千代田区一番町15番地５ 東京湾 横断道路株式会社内 (72)発明者 寺崎 勝 東京都中央区八重洲２丁目６番21号 石 川島建材工業株式会社内 (72)発明者 松葉 忠 千葉県我孫子市中峠1604−74 (72)発明者 遠藤 房男 東京都中央区日本橋本町１−５−６ 日 本鋼管ライトスチール株式会社内 (72)発明者 藤野 豊 東京都文京区千駄木５−43−15 (72)発明者 茂手木 徳次郎 東京都文京区小日向２丁目９番地８号 パークハイムＮＯ．101 (56)参考文献 特開 平４−11200（ＪＰ，Ａ) 特開 平３−286099（ＪＰ，Ａ) 実開 平４−4995（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) E21D 11/04 E21D 11/08──────────────────────────────────────────────────続 き Continuation of the front page (73) Patent holder 000230010 Geo 2-32-4, Shiba, Minato-ku, Tokyo (73) Patent holder 000112749 Fujimi Engineering Co., Ltd. 3-1-118 Iidabashi, Chiyoda-ku, Tokyo No. (72) Inventor Yukitake Shioi 15-5, Ichibancho, Chiyoda-ku, Tokyo Inside Tokyo Bay Crossing Road Co., Ltd. (72) Inventor Masaru Terasaki 2-6-1, Yaesu, Chuo-ku, Tokyo Ishikawashima Construction Materials Co., Ltd. (72) Inventor Tada Matsuba 1604-74 Nakatoge, Abiko-shi, Chiba (72) Inventor Fumio Endo 1-5-6 Nihonbashi Honcho, Chuo-ku, Tokyo Inside Nihon Kokan Light Steel Co., Ltd. (72) Inventor Fujino Toyohide Tokujiro Mogetaki 2-9-1, Obinata, Bunkyo-ku, Tokyo Parkheim NO. 101 (56) References JP-A-4-11200 (JP, A) JP-A-3-286099 (JP, A) JP-A-4-4995 (JP, U) (58) Fields investigated (Int. 6 , DB name) E21D 11/04 E21D 11/08
Claims (3)
の内径より僅かに大きい内径のボルト挿通孔を有するパ
イプがコンクリート中に配置され、前記ボルト挿通孔に
挿通するとともに、端部にナットが螺合されるボルトの
ねじ部の谷に非連続のリング状弾性体が嵌められてパイ
プのボルト挿通孔とボルトねじ山との間に小間隙を保持
し、ボルトがボルト挿通孔のほぼ中央に位置するように
してあることを特徴とするセグメントのボルト接合部構
造。1. A pipe having a bolt insertion hole having an inner diameter slightly larger than an inner diameter of a bolt insertion hole of a support plate is disposed in concrete inside the support plate, and is inserted into the bolt insertion hole. A discontinuous ring-shaped elastic body is fitted in the valley of the threaded portion of the bolt to which the nut is screwed, maintaining a small gap between the bolt insertion hole of the pipe and the bolt screw thread, and the bolt is substantially in the bolt insertion hole. A bolted joint structure for a segment, which is located at the center.
の内径より僅かに大きい内径のボルト挿通孔をコンクリ
ート中に形成し、かつそのボルト挿通孔を支圧板側が小
径となるようテーパ状に形成され、前記ボルト挿通孔に
挿通するとともに、端部にナットが螺合されるボルトの
ねじ部の谷に非連続のリング状弾性体が嵌められて前記
テーパー状のボルト挿通孔とボルトねじ山との間に小間
隙を保持し、ボルトがボルト挿通孔のほぼ中央に位置す
るようにしてあることを特徴とするセグメントのボルト
接合部構造。2. A bolt insertion hole having an inside diameter slightly larger than the inside diameter of the bolt insertion hole of the support plate is formed in the concrete inside the support plate, and the bolt insertion hole is tapered so that the diameter of the support plate becomes smaller on the support plate side. And a discontinuous ring-shaped elastic body is fitted into a valley of a screw portion of a bolt to which a nut is screwed at an end, and the tapered bolt insertion hole and the bolt screw are inserted into the bolt insertion hole. A bolt connection structure for a segment, wherein a small gap is maintained between the ridge and the ridge, and the bolt is positioned substantially at the center of the bolt insertion hole.
の内径より僅かに大きい内径のボルト挿通孔を有し、か
つ中間に外方に広がって膨出するリング状弾性体収納溝
を形成したパイプがコンクリート中に配置され、前記ボ
ルト挿通孔に挿通するとともに、端部にナットが螺合さ
れるボルトに、前記リング収納溝に嵌合されたリング状
弾性体が嵌められて、パイプのボルト挿通孔とボルトね
じ山との間に小間隙を保持し、ボルトがボルト挿通孔の
ほぼ中央に位置するようにしてあることを特徴とするセ
グメントのボルト接合部構造。3. A ring-shaped elastic body accommodating groove having a bolt insertion hole having an inner diameter slightly larger than the inner diameter of a bolt insertion hole of the support plate, and expanding outward and swelling in the middle. The formed pipe is arranged in concrete, inserted into the bolt insertion hole, and a ring-shaped elastic body fitted in the ring storage groove is fitted to a bolt to which a nut is screwed at an end, and the pipe is formed. A small gap is maintained between the bolt insertion hole and the bolt screw thread, and the bolt is positioned substantially at the center of the bolt insertion hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4109928A JP2774017B2 (en) | 1992-04-28 | 1992-04-28 | Segment bolt connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4109928A JP2774017B2 (en) | 1992-04-28 | 1992-04-28 | Segment bolt connection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05302498A JPH05302498A (en) | 1993-11-16 |
| JP2774017B2 true JP2774017B2 (en) | 1998-07-09 |
Family
ID=14522668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4109928A Expired - Fee Related JP2774017B2 (en) | 1992-04-28 | 1992-04-28 | Segment bolt connection structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2774017B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4970021B2 (en) * | 2006-12-20 | 2012-07-04 | 前田建設工業株式会社 | Drilling device and segment connecting bolt removing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07103788B2 (en) * | 1990-04-27 | 1995-11-08 | 鹿島建設株式会社 | Concrete segment connecting device |
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1992
- 1992-04-28 JP JP4109928A patent/JP2774017B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| JPH05302498A (en) | 1993-11-16 |
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