JP4316098B2 - Segment joint structure - Google Patents

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JP4316098B2
JP4316098B2 JP2000098277A JP2000098277A JP4316098B2 JP 4316098 B2 JP4316098 B2 JP 4316098B2 JP 2000098277 A JP2000098277 A JP 2000098277A JP 2000098277 A JP2000098277 A JP 2000098277A JP 4316098 B2 JP4316098 B2 JP 4316098B2
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joint
segment
joining
sealing material
tunnel
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JP2001280083A (en
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宗孝 大関
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石川島建材工業株式会社
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Description

【0001】
【発明の属する技術分野】
本発明は、坑道の周壁方向と坑道の長さ方向とにつなぎ合わされるセグメントの接合構造に関する。
【0002】
【従来の技術】
シールドトンネルの工事用部材には、図7に示すモジュール化された多数のセグメント1が使用される。セグメント1は、トンネル施工の際、坑道の周壁回りと坑道の長さ方向との両方に密につなぎ合わされて接合される。各セグメント1は、周方向に沿った接合面と、長さ方向に沿った接合面とに、相互の接合面同士を当接した際に連通する孔2を有し、互いに隣接する接合面同士がこの孔2に挿通された結合ボルトで締着して結合される。
【0003】
ところが、各セグメント1の接合面毎に設けられた孔2に、手作業によりボルトを挿通させ、このボルトにナットを螺合させる作業は、多大な労力を要する。また、ボルト・ナットの締着による接合構造は、ロボットを用いた自動組付けの障害ともなった。
【0004】
このような不具合を解消するものに、隣接するセグメントの接合面の対向位置に、断面C型の接合金具を埋設しておき、接合面同士のこれら接合金具に両端部が係合する断面I型の連結金具を嵌め込むことにより、C型の接合金具同士をI型の連結金具によって連結させ、セグメントの接合面同士を接合させる構造が開発されている。そして、この種のセグメントの接合構造によれば、接合金具と連結金具とにテーパ面を形成しておき、連結金具を左右の接合金具に押し込むことで、左右の接合金具同士を近接させて、よりセグメント同士の接合力を高めることができる。
【0005】
【発明が解決しようとする課題】
上述した従来のセグメントの接合構造は、接合金具と連結金具とのテーパ面同士を摺接しながら嵌合させるため、セグメントと接合金具との高精度な取付けが要求された。即ち、既に接合の完了したセグセメントに設けられた接合金具は、次に接合されるセグセメントの接合金具と、連結金具を介して連結される。この際、次に接合されるセグセメントとこのセグセメントに取り付けられる接合金具との間に例えば坑道の長さ方向の相対的な位置ずれが生じていると、連結金具によって、左右の接合金具同士が完全に近接される前に、セグセメントが、既に構築されている坑道先端側の環状セグメント群に当接し、接合金具と連結金具とのテーパ面同士の間に、隙間の生じる問題があった。このような隙間が生じれば、接合面同士の十分な引き寄せができなくなる上に、周壁方向で隣接するセグメント同士にガタの生じる虞れもあった。
本発明は上記状況に鑑みてなされたもので、テーパ面の形成された接合金具と連結金具とを有するセグメントの接合構造において、テーパ面同士の間に生じる隙間が除去されるセグメントの接合構造を提供し、セグメント同士のガタ防止を図ることを目的とする。
【0006】
【課題を解決するための手段】
上記目的を達成するための本発明に係る請求項1記載のセグメントの接合構造は、坑道の周壁方向に接合されるセグメントの、坑軸に平行な接合面同士に断面C型の接合金具がそれぞれ設けられ、該接合金具同士が、断面I型の連結金具の両端部に係合され、隣接する一方のセグメントに対して坑道後端側から他方のセグメントが坑道先端側へ押し込まれることで、前記接合金具と該連結金具とに形成されたテーパ面同士が摺接されて、接合金具同士が引き寄せられ、隣接するセグメント同士が接合されるセグメントの接合構造において、隣接する一方のセグメントの前記接合面に、坑道後端側から坑道先端側へ向かうにしたがって徐々に該接合面から突出されるシール材が貼着され、隣接する他方のセグメントの前記接合面に、坑道前端側から坑道後端側へ向かうにしたがって徐々に該接合面から突出されるシール材が貼着されることを特徴とする。
【0007】
このセグメントの接合構造では、隣接する一方のセグメントに対して他方のセグメントが坑道先端側へ押し込まれると、シール材の突出部分同士が徐々に摺接し合うようになり、シール材同士に、接合に伴って徐々に大きくなる反発力が生じる。そして、この反発力は、接合金具と連結金具とを離反させる方向の付勢力となる。従って、離反方向に付勢された接合金具と連結金具は、テーパ面同士が密着されることになり、テーパ面同士の間に生じる隙間が除去され、周壁方向に隣接するセグメント同士のガタがなくなる。
【0008】
請求項2記載のセグメントの接合構造は、前記シール材の収容される前記溝がテーパ溝で形成され、前記シール材が均一な厚みで形成されることで前記シール材が前記接合面から徐々に突出されることを特徴とする。
【0009】
このセグメントの接合構造では、均一な厚みのシール材を用いて、このシール材を接合面から徐々に突出されることが可能になる。従って、従来のシール材が使用可能になり、シール材の成形型に変更が生じず、シール材のコストが高くなることがない。一方、セグメントの接合面に設けられるテーパ溝は、通常の溝から、比較的安価に変更が可能になる。
【0010】
請求項3記載のセグメントの接合構造は、前記シール材の収容される溝が均一な深さの溝で形成され、前記シール材の厚みがテーパ状に形成されることで前記シール材が前記接合面から徐々に突出されることを特徴とする。
【0011】
このセグメントの接合構造では、シール材の収容される溝が均一な深さで形成されるとともに、シール材の厚みがテーパ状に形成される。従って、セグメントに貼着されるシール材の内周側は、従来と同様の矩形枠形状でよく、特に隅部での納まりを低下させずに(セグメントの出隅部に、シール材の入隅部が確実に一致して)、シール材が接合面から徐々に突出可能となる。
【0012】
【発明の実施の形態】
以下、本発明に係るセグメントの接合構造の好適な実施の形態を図面を参照して詳細に説明する。
図1は本発明に係るセグメントの接合構造の分解斜視図、図2は図1の接合構造の備えられた隣接するセグメントの分解平面図、図3は図1の接合構造に用いられる接合金具及び連結金具を示した分解斜視図、図4は図2のセグメントの接合手順を示す接合前の説明図、図5は図2のセグメントの接合手順を示す接合後の説明図、図6は図5のA−A断面図である。
【0013】
セグメント11は、平面視長方形に形成されたコンクリート製のものであり、これらセグメント11の坑道の周壁方向の端面となる接合面13を互いに接合させることにより、掘削穴内にてトンネル壁体を構成するリングが構築される。そして、このリングを坑道の中心軸(坑軸)方向へ互いに接合させることにより、トンネル壁体が構築されるようになっている。
【0014】
これらセグメント11の接合面13には、坑軸方向の接合溝部15が、坑軸方向に間隔を有して一対形成されている。これら接合溝部15には、図3に示す断面C型の接合金具17が設けられ、これら接合金具17同士は断面I型の連結金具19によって互いに連結されるようになっている。
【0015】
接合金具17は、図6に示すように、係止片部21を有する鉤形に形成された一対の係止部23が互いに対向位置に設けられたもので、これら係止部23同士によって形成された空間が連結金具19の係合部25が係合する係合空間27とされている。また、係止片部21の内面からなる係止面29は、連結金具19の挿入方向(図3の矢印イ)へ向かって係合空間27を狭めるテーパ面とされている。つまり、セグメント11の接合面13同士を突き合わせた状態にて、互いに対向する接合金具17の係止面29が、連結金具19の挿入方向の奥方へ向かって次第に離間するテーパ面とされている。
【0016】
この接合金具17には、複数の突起部31が配列され、これら突起部31には、それぞれアンカー筋33がねじ込まれて連結されている。接合金具17は、一対のものが、互いの連結金具19の挿入方向を互いに近接する逆向きにするようにして各接合溝部15に埋設されている。
【0017】
接合金具17の係止片部21の係止面29と当接して係合する連結金具19の係合部25に形成された係合面37は、接合金具17の係止面29と同様、端側に至るほど、係合部25の幅を狭め対向する係合面37同士が徐々に離間するテーパ面とされている。この連結金具19は、係合部25の幅が狭い側から接合金具17に挿入されることになり、同一直線上に配置された接合金具17の各対に対し、逆向きにそれぞれ挿入されることになる。そして、これらの連結金具19は、互いに近接する方向に移動することで、テーパ面からなる両係合面37がテーパ面からなる対向する接合金具17の両係止面29に乗り上げ、接合金具17の対向するもの同士をそれぞれ引き寄せ合うことになる。
【0018】
各接合溝部15には、接合金具17に挿入された状態で一方向に押し込まれることで接合金具17の対向するもの同士を引き寄せ合う連結金具19の前記押し込み方向における後側に一端側が当接し、他端側が接合溝部15の接合金具17に対向する端面39(図4参照)に当接するように配置されて各連結金具19へ前記押し込み方向の反力を付与する反力付与部材41が設けられている。ここで、反力付与部材41は、該反力付与部材41が設けられるセグメント11自体の接合溝部15の接合金具17に対向する端面39に当接することで、該反力付与部材41が設けられるセグメント11自体に反力をとるようになっている。
【0019】
図2に示すように、坑道の周壁方向で隣接する一方のセグメント11aの接合面13aには、坑道後端側から坑道先端側へ向かうにしたがって徐々に接合面13aから突出されるシール材43aが貼着されている。また、隣接する他方のセグメント11bの接合面13bには、坑道前端側から坑道後端側へ向かうにしたがって徐々に接合面13bから突出されるシール材43bが貼着されている。これら両方のシール材43a、43bは、一方のセグメント11aと、他方のセグメント11bとが接合される際に、相互に摺接される。
【0020】
本実施の形態では、図1に示すように、接合溝部15を挟んで、接合面13の上下に坑軸方向に延びる一対の溝45が形成され、この溝45のそれぞれにシール材43が貼着されている。本実施の形態において、シール材43は、長さ方向に亘って均一な厚みで形成されている。一方、シール材43の収容される溝45は、接合面13の坑道後端側から坑道前端側へ向かうにしたがって徐々に浅くなる、又はその逆のテーパ溝となっている。
【0021】
即ち、図2に示すように、一方のセグメント11aに形成される溝45aは、坑道後端側から坑道先端側へ向かうにしたがって徐々に浅くなるテーパ溝で形成され、他方のセグメント11bに形成される溝45bは、坑道先端側から坑道後端側へ向かうにしたがって徐々に浅くなるテーパ溝で形成されている。これにより、均一な厚みのシール材43は、接合面13から徐々に突出されるようになっている。
【0022】
均一な厚みのシール材43を用いて、このシール材43を接合面13から徐々に突出されることとすれば、従来のシール材が使用可能になり、シール材43の成形型に変更が生じず、シール材43のコストが高くなることがない。一方、セグメントの接合面に設けられるテーパ溝は、通常の溝から、比較的安価に変更が可能になる。
【0023】
また、これとは逆に、図示は省略するが、シール材43の収容される溝45が均一な深さの溝で形成され、シール材43の厚みがテーパ状に形成されることで、シール材43が接合面13から徐々に突出される構造としてもよい。
【0024】
この場合、セグメント11に貼着されるシール材43の内周側は、従来と同様の矩形枠形状でよく、特にセグメント11の隅部での納まりを低下させずに(セグメント11の出隅部に、シール材43の入隅部が確実に一致して)、シール材43が接合面13から徐々に突出可能となる。
【0025】
シール材43は、水膨張性材料、例えば高吸収性樹脂と、合成ゴムとが混合成形加硫されてなる材料が用いられ、所定の弾性を有している。シール材43は、接合面13の全周に貼着されることとなるが、接合面13a、接合面13b以外の接合面13c、13dにおいては、通常と同様に、長さ方向の任意の位置で、接合面13c、13dから均一に突出されている。
【0026】
次に、このように構成されるセグメントの接合構造の作用を説明する。
図4に示すように、既に設置されたセグメント11aの接合面13aに形成された坑道先端側(既設リング47側)の接合溝部15aに連結金具19aを挿入し坑道後端側に移動させる。その結果、連結金具19aは、一方の係合部25が接合金具17aの係合空間27に挿入されるとともに他方の係合部25が接合金具17aから突出することになる。これにより、既に設置されているセグメント11aの既設リング47側の接合金具17aに連結金具19aが先付けされる。この状態で、接合溝部15a内に、反力付与部材41を配置する。
【0027】
一方、次に接合されるセグメント11bの坑道後端側の接合溝部15bには連結金具19bを挿入し、この連結金具19bを坑道先端側に移動させる。その結果、連結金具19bは、一方の係合部25が接合金具17bの係合空間27に挿入されるとともに他方の係合部25が接合金具17bから突出することになる。これにより、次に接合されるセグメント11bの坑道後端側の接合金具17bに連結金具19bが先付けされる。この状態で、接合溝部15b内に、反力付与部材41を配置する。
【0028】
次いで、既設のセグメント11aの坑道先端側の接合金具17aに係合して突出した連結金具19aを、次に接合するセグメント11bの坑道先端側の接合溝部15cに挿入するとともに、次に接合するセグメント11bの坑道後端側の接合金具17bに係合して突出した連結金具19bを、既設のセグメント11aの坑道後端側の接合溝部15dに挿入させつつ、セグメント11aとセグメント11bとを接合面13a、13b同士で突き合わせる。
【0029】
この突き合わせ状態において、接合面13aに設けられたシール材43aと、接合面13bに設けられたシール材43bとは当接されることになる。
【0030】
この状態で、セグメント11bを坑道先端側に移動させる。すると、セグメント11bにセットされていた連結金具19bが、セグメント11bと一体に移動してセグメント11aの坑道後端側の接合金具17cに入り込むとともに、セグメント11aにセットされていた坑道先端側の連結金具19aが、セグメント11bの坑道先端側の接合金具17dに入り込むことになる。
【0031】
そして、図5に示すように、セグメント11bを既設リング47に当接するまで移動させると、連結金具19の係合部25が接合金具17の係合空間27内に嵌合し、接合金具17のテーパ面からなる係止面29に、連結金具19のテーパ面からなる係合面37が係合することで、接合金具17aと17d、及び接合金具17cと17b同士が引き寄せられる。
【0032】
従って、接合面13a、13bに設けられたシール材43a、43bは、隣接する一方のセグメント11aに対して他方のセグメント11bが坑道先端側へ押し込まれると、シール材43a、43bの突出部分同士が徐々に摺接し合うようになり、シール材43a、43b同士に、接合に伴って徐々に大きくなる反発力が生じる。そして、この反発力は、接合金具17と連結金具19とを離反させる方向の付勢力となる。これにより、離反方向に付勢された接合金具17と連結金具19は、テーパ面同士が密着されることになり、テーパ面同士の間に生じる隙間が除去される。つまり、周壁方向に隣接するセグメント11a、11b同士のガタがなくなる。
【0033】
このように、上述のセグメントの接合構造によば、隣接する一方のセグメント11aに対して他方のセグメント11bを坑道先端側へ押し込むことで、シール材43の突出部分同士を徐々に摺接させ、シール材43同士に、接合に伴って徐々に大きくなる反発力を生じさせることができる。この結果、テーパ面同士を確実に密着させることができ、テーパ面同士の間に生じる隙間を除去して、周壁方向に隣接するセグメント同士のガタを防止することができる。
【0034】
【発明の効果】
以上詳細に説明したように、本発明に係るセグメントの接合構造は、隣接する一方のセグメントの接合面に、坑道後端側から坑道先端側へ向かうにしたがって徐々に接合面から突出するシール材を貼着し、隣接する他方のセグメントの接合面に、坑道前端側から坑道後端側へ向かうにしたがって徐々に接合面から突出するシール材を貼着したので、隣接する一方のセグメントに対して他方のセグメントを坑道先端側へ押し込むことで、シール材の突出部分同士を徐々に摺接させ、シール材同士に、接合に伴って徐々に大きくなる反発力を生じさせることができる。そして、この反発力は、接合金具と連結金具とを離反させる方向の付勢力となる。この結果、テーパ面同士を密着させることができ、テーパ面同士の間に生じる隙間を除去して、周壁方向に隣接するセグメント同士のガタを確実に防止することができる。
【図面の簡単な説明】
【図1】 本発明に係るセグメントの接合構造の分解斜視図である。
【図2】 図1の接合構造の備えられた隣接するセグメントの分解平面図である。
【図3】 図1の接合構造に用いられる接合金具及び連結金具を示した分解斜視図である。
【図4】 図2のセグメントの接合手順を示す接合前の説明図である。
【図5】 図2のセグメントの接合手順を示す接合後の説明図である。
【図6】 図5のA−A断面図である。
【図7】 従来のセグメントの接合構造の斜視図である。
【符号の説明】
11(11a、11b) セグメント
13(13a、13b) 坑軸に平行な接合面
17(17a、17b、17c、17d) 接合金具
19(19a、19b) 連結金具
43(43a、43b) シール材
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joining structure of segments joined together in a peripheral wall direction of a mine shaft and a length direction of the mine shaft.
[0002]
[Prior art]
A number of modularized segments 1 shown in FIG. 7 are used for the construction member of the shield tunnel. When the tunnel is constructed, the segment 1 is closely connected and joined to both the circumference of the gallery and the length direction of the mine. Each segment 1 has a hole 2 that communicates with each other when the joint surfaces are in contact with each other on the joint surface along the circumferential direction and the joint surface along the length direction. Are fastened with a connecting bolt inserted into the hole 2 and then connected.
[0003]
However, the work of manually inserting a bolt into the hole 2 provided for each joint surface of each segment 1 and screwing the nut into the bolt requires a lot of labor. Also, the joint structure by fastening bolts and nuts has become an obstacle to automatic assembly using a robot.
[0004]
In order to eliminate such problems, a cross-section C-shaped joint fitting is embedded in a position opposite to the joint surface of adjacent segments, and both cross-sections are engaged with these joint fittings between the joint surfaces. In other words, a structure has been developed in which C-type joint fittings are joined together by I-type joint fittings, and the joint surfaces of the segments are joined together. And according to this type of segment joining structure, a tapered surface is formed on the joining bracket and the coupling bracket, and by pushing the coupling bracket into the left and right junction brackets, the left and right junction brackets are brought close to each other, The joining force between the segments can be further increased.
[0005]
[Problems to be solved by the invention]
In the conventional segment joining structure described above, since the taper surfaces of the joining metal fitting and the connecting metal fitting are fitted in sliding contact with each other, high-precision attachment between the segment and the joining metal fitting is required. That is, the joint fitting provided on the seg cement that has already been joined is connected to the joint fixture of the next seg cement to be joined via the joint fitting. At this time, if there is a relative displacement in the length direction of the tunnel, for example, between the seg cement to be joined next and the joint fitting attached to the seg cement, the left and right joint fittings are completely Before the seg cement comes close to the seg cement, the seg cement comes into contact with the already constructed annular segment group on the tunnel tip side, and there is a problem that a gap is generated between the tapered surfaces of the joining metal fitting and the connecting metal fitting. If such a gap is generated, it becomes impossible to sufficiently attract the joint surfaces, and there is a possibility that the adjacent segments in the circumferential wall direction may be loose.
The present invention has been made in view of the above situation, and in a joint structure of a segment having a joint metal fitting and a joint metal fitting having a tapered surface, a segment joint structure in which a gap generated between the taper surfaces is removed. The purpose is to prevent backlash between segments.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, there is provided a segment joining structure according to the present invention. Provided, the joining metal fittings are engaged with both end portions of the I-shaped connecting metal fittings, and the other segment is pushed from the mine shaft rear end side to the mine shaft leading end side with respect to one adjacent segment, In the joining structure of the segment in which the tapered surfaces formed on the joining metal fitting and the connection fitting are slidably brought into contact with each other, and the joining metal parts are drawn together, and the adjacent segments are joined together, the joining surface of one adjacent segment The seal material gradually protruding from the joint surface as it goes from the rear end side of the tunnel toward the front end side of the tunnel is attached, and the front end side of the tunnel is attached to the joint surface of the other adjacent segment. Sealant gradually protrude from the joint surface toward the Luo mine rear end, characterized in that it is stuck.
[0007]
In the joining structure of this segment, when the other segment is pushed toward the tunnel tip side with respect to one adjacent segment, the protruding parts of the sealing material gradually come into sliding contact with each other, A repulsive force that gradually increases with this occurs. This repulsive force becomes an urging force in a direction that separates the joint fitting and the connection fitting. Therefore, the joint metal and the connection metal that are urged in the separating direction are brought into close contact with each other, the gap formed between the taper surfaces is removed, and there is no backlash between segments adjacent in the circumferential wall direction. .
[0008]
The segment joining structure according to claim 2, wherein the groove in which the sealing material is accommodated is formed as a tapered groove, and the sealing material is formed with a uniform thickness so that the sealing material is gradually formed from the joining surface. It is protruded.
[0009]
In the joining structure of this segment, it becomes possible to gradually project this sealing material from the joining surface by using a sealing material having a uniform thickness. Therefore, the conventional sealing material can be used, the molding die of the sealing material is not changed, and the cost of the sealing material is not increased. On the other hand, the taper groove provided on the joint surface of the segment can be changed relatively inexpensively from a normal groove.
[0010]
The segment joining structure according to claim 3, wherein the groove in which the sealing material is accommodated is formed with a groove having a uniform depth, and the sealing material is formed in a tapered shape so that the sealing material is joined to the joining material. It is characterized by gradually protruding from the surface.
[0011]
In this segment joining structure, the groove in which the sealing material is accommodated is formed with a uniform depth, and the thickness of the sealing material is tapered. Therefore, the inner peripheral side of the sealing material adhered to the segment may have the same rectangular frame shape as the conventional one, and in particular, without reducing the fit at the corner (the corner of the sealing material entering the corner of the segment). The sealing material can gradually protrude from the joining surface.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the segment joining structure according to the present invention will be described below in detail with reference to the drawings.
1 is an exploded perspective view of a joining structure of segments according to the present invention, FIG. 2 is an exploded plan view of an adjacent segment provided with the joining structure of FIG. 1, and FIG. 3 is a joint fitting used in the joining structure of FIG. 4 is an exploded perspective view showing the connecting metal fitting, FIG. 4 is an explanatory view before joining showing the joining procedure of the segments in FIG. 2, FIG. 5 is an explanatory view after joining showing the joining procedure of the segments in FIG. 2, and FIG. It is AA sectional drawing.
[0013]
The segments 11 are made of concrete formed in a rectangular shape in plan view, and a tunnel wall body is formed in the excavation hole by joining the joining surfaces 13 which are the end faces in the peripheral wall direction of the tunnels of the segments 11 to each other. A ring is constructed. And a tunnel wall body is constructed | assembled by mutually joining this ring to the center axis | shaft (mine shaft) direction of a mine shaft.
[0014]
A pair of joint groove portions 15 in the mine shaft direction are formed on the joint surfaces 13 of these segments 11 with a gap in the mine shaft direction. These joint grooves 15 are provided with C-shaped joint brackets 17 shown in FIG. 3, and these joint brackets 17 are connected to each other by a joint bracket 19 having an I-shaped cross section.
[0015]
As shown in FIG. 6, the joint fitting 17 is formed by a pair of locking portions 23 formed in a bowl shape having locking pieces 21 at opposite positions, and formed by the locking portions 23. The space thus formed is an engagement space 27 in which the engagement portion 25 of the coupling metal 19 is engaged. Further, the locking surface 29 formed by the inner surface of the locking piece portion 21 is a tapered surface that narrows the engagement space 27 in the insertion direction of the connection fitting 19 (arrow A in FIG. 3). In other words, in a state where the joint surfaces 13 of the segment 11 are abutted with each other, the locking surfaces 29 of the joint fittings 17 facing each other are tapered surfaces that are gradually separated toward the back in the insertion direction of the connection fitting 19.
[0016]
A plurality of protrusions 31 are arranged on the joint fitting 17, and anchor bars 33 are screwed and connected to the protrusions 31. A pair of joining fittings 17 are embedded in each joining groove 15 so that the insertion directions of the connecting fittings 19 are opposite to each other.
[0017]
The engaging surface 37 formed on the engaging portion 25 of the connecting fitting 19 that comes into contact with and engages with the engaging surface 29 of the engaging piece portion 21 of the joining fitting 17 is the same as the engaging surface 29 of the joining fitting 17. The closer to the end side, the narrower the width of the engaging portion 25 is, and the opposing engaging surfaces 37 are tapered surfaces that gradually separate from each other. The connection fitting 19 is inserted into the joining fitting 17 from the side where the width of the engaging portion 25 is narrow, and is inserted in the opposite direction with respect to each pair of joining fittings 17 arranged on the same straight line. It will be. And these connection metal fittings 19 move in the direction which adjoins mutually, and both the engagement surfaces 37 which consist of a taper surface ride on both the latching surfaces 29 of the joint metal fitting 17 which consists of a taper surface, and the joint metal fitting 17 Will be attracted to each other.
[0018]
One end side of each joining groove portion 15 abuts on the rear side in the pushing direction of the connecting fitting 19 that pulls together the opposing fittings 17 by being pushed in one direction while being inserted into the joining fitting 17, A reaction force imparting member 41 is provided so that the other end is in contact with an end face 39 (see FIG. 4) of the joining groove portion 15 facing the joining fitting 17 and imparts a reaction force in the pushing direction to each connecting fitting 19. ing. Here, the reaction force application member 41 is provided by coming into contact with the end surface 39 of the joining groove portion 15 of the segment 11 itself on which the reaction force application member 41 is provided, facing the joining metal member 17. The reaction force is applied to the segment 11 itself.
[0019]
As shown in FIG. 2, a sealing material 43a that gradually protrudes from the joint surface 13a toward the tunnel tip side from the tunnel rear end side is formed on the joint surface 13a of one segment 11a adjacent in the circumferential wall direction of the tunnel. It is stuck. Moreover, the sealing material 43b which protrudes gradually from the joining surface 13b is stuck on the joining surface 13b of the other adjacent segment 11b as it goes from the tunnel front end side to the tunnel rear end side. Both the sealing materials 43a and 43b are brought into sliding contact with each other when the one segment 11a and the other segment 11b are joined.
[0020]
In the present embodiment, as shown in FIG. 1, a pair of grooves 45 extending in the down-axis direction are formed above and below the joint surface 13 with the joint groove 15 interposed therebetween, and a seal material 43 is pasted on each of the grooves 45. It is worn. In the present embodiment, the sealing material 43 is formed with a uniform thickness over the length direction. On the other hand, the groove 45 in which the sealing material 43 is accommodated is a tapered groove that gradually becomes shallower from the tunnel rear end side of the joint surface 13 toward the tunnel front end side or vice versa.
[0021]
That is, as shown in FIG. 2, the groove 45a formed in one segment 11a is formed as a tapered groove that becomes gradually shallower from the mine shaft rear end side toward the mine shaft tip side, and is formed in the other segment 11b. The groove 45b is formed by a taper groove that gradually becomes shallower from the tunnel leading end toward the tunnel trailing end. Accordingly, the sealing material 43 having a uniform thickness is gradually projected from the joint surface 13.
[0022]
If the sealing material 43 having a uniform thickness is used and the sealing material 43 is gradually projected from the joint surface 13, the conventional sealing material can be used, and the molding die of the sealing material 43 is changed. Therefore, the cost of the sealing material 43 does not increase. On the other hand, the taper groove provided on the joint surface of the segment can be changed relatively inexpensively from a normal groove.
[0023]
On the contrary, although not shown, the groove 45 in which the sealing material 43 is accommodated is formed with a groove having a uniform depth, and the thickness of the sealing material 43 is tapered, so that It is good also as a structure where the material 43 protrudes from the joint surface 13 gradually.
[0024]
In this case, the inner peripheral side of the sealing material 43 adhered to the segment 11 may have a rectangular frame shape similar to the conventional one, and in particular, without reducing the fit at the corner of the segment 11 (the projected corner of the segment 11). In addition, the corners of the sealing material 43 are surely aligned), and the sealing material 43 can gradually protrude from the joint surface 13.
[0025]
The seal material 43 is made of a water-swellable material, for example, a material obtained by mixing and vulcanizing a high-absorbency resin and synthetic rubber, and has a predetermined elasticity. The sealing material 43 is attached to the entire circumference of the bonding surface 13. However, in the bonding surfaces 13 c and 13 d other than the bonding surface 13 a and the bonding surface 13 b, any position in the length direction is used as usual. Therefore, it protrudes uniformly from the joint surfaces 13c and 13d.
[0026]
Next, the operation of the joining structure of segments configured as described above will be described.
As shown in FIG. 4, the connecting fitting 19a is inserted into the joint groove 15a on the tunnel top side (the existing ring 47 side) formed on the joint surface 13a of the already installed segment 11a and moved to the tunnel rear end side. As a result, as for the connection metal fitting 19a, one engagement part 25 is inserted in the engagement space 27 of the joining metal fitting 17a, and the other engagement part 25 protrudes from the joining metal fitting 17a. As a result, the connecting bracket 19a is first attached to the joining bracket 17a on the existing ring 47 side of the already installed segment 11a. In this state, the reaction force application member 41 is disposed in the joining groove portion 15a.
[0027]
On the other hand, the connecting fitting 19b is inserted into the joining groove 15b on the rear end side of the mine shaft of the segment 11b to be joined next, and the connecting fitting 19b is moved to the mine tip side. As a result, as for the connection metal fitting 19b, one engagement part 25 is inserted in the engagement space 27 of the joining metal fitting 17b, and the other engagement part 25 protrudes from the joining metal fitting 17b. As a result, the connecting fitting 19b is attached to the joining fitting 17b on the rear end side of the tunnel of the segment 11b to be joined next. In this state, the reaction force application member 41 is disposed in the joining groove portion 15b.
[0028]
Next, the connecting fitting 19a that engages and protrudes from the joint fitting 17a on the mine shaft tip side of the existing segment 11a is inserted into the joining groove portion 15c on the mine tip side of the segment 11b to be joined next, and then the segment to be joined next. 11b is inserted into the joint groove portion 15d on the mine shaft rear end side of the existing segment 11a, and the segment 11a and the segment 11b are joined to the joint surface 13a. , 13b.
[0029]
In this butted state, the sealing material 43a provided on the joining surface 13a and the sealing material 43b provided on the joining surface 13b are brought into contact with each other.
[0030]
In this state, the segment 11b is moved to the tunnel tip side. Then, the connecting fitting 19b set on the segment 11b moves integrally with the segment 11b and enters the joining fitting 17c on the rear end side of the mine shaft of the segment 11a, and the connecting fitting on the mine shaft end side set on the segment 11a. 19a enters the joint fitting 17d on the mine shaft tip side of the segment 11b.
[0031]
Then, as shown in FIG. 5, when the segment 11 b is moved until it abuts against the existing ring 47, the engaging portion 25 of the connection fitting 19 is fitted into the engagement space 27 of the joining fitting 17, By engaging the engagement surface 37 made of the tapered surface of the coupling metal 19 with the locking surface 29 made of a tapered surface, the joint metal fittings 17a and 17d and the joint metal fittings 17c and 17b are pulled together.
[0032]
Therefore, when the other segment 11b is pushed into the tunnel tip side with respect to the adjacent one segment 11a, the protruding portions of the seal materials 43a and 43b are formed between the seal members 43a and 43b provided on the joint surfaces 13a and 13b. The sealing materials 43a and 43b gradually come into sliding contact with each other, and a repulsive force that gradually increases with joining is generated. The repulsive force becomes an urging force in a direction in which the joining metal member 17 and the connecting metal member 19 are separated from each other. Thereby, the taper surfaces of the joining metal member 17 and the connecting metal member 19 urged in the separating direction are brought into close contact with each other, and a gap generated between the taper surfaces is removed. That is, there is no backlash between the segments 11a and 11b adjacent in the circumferential wall direction.
[0033]
Thus, according to the joint structure of the above-mentioned segment, by pushing the other segment 11b to the adjacent one segment 11a to the tunnel tip side, the projecting portions of the seal material 43 are gradually slidably brought into contact with each other. A repulsive force that gradually increases with bonding can be generated between the sealing materials 43. As a result, the taper surfaces can be reliably brought into close contact with each other, and a gap generated between the taper surfaces can be removed to prevent backlash between segments adjacent in the circumferential wall direction.
[0034]
【The invention's effect】
As described in detail above, the segment joining structure according to the present invention has a sealing material that gradually protrudes from the joining surface toward the joining end surface of one adjacent segment from the rear end side of the tunnel to the leading end side of the tunnel. Affixed and a sealing material that gradually protrudes from the joint surface as it goes from the tunnel front end side to the tunnel rear end side is pasted to the joint surface of the other adjacent segment. By pushing this segment toward the tunnel tip side, the protruding portions of the sealing material can be gradually brought into sliding contact with each other, and a repulsive force that gradually increases with joining can be generated between the sealing materials. This repulsive force becomes an urging force in a direction that separates the joint fitting and the connection fitting. As a result, the taper surfaces can be brought into close contact with each other, and a gap generated between the taper surfaces can be removed to reliably prevent backlash between segments adjacent in the circumferential wall direction.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a joining structure of segments according to the present invention.
FIG. 2 is an exploded plan view of an adjacent segment provided with the joining structure of FIG. 1;
3 is an exploded perspective view showing a joint metal fitting and a connection metal fitting used in the joint structure shown in FIG. 1. FIG.
FIG. 4 is an explanatory view before joining showing a joining procedure of the segments in FIG. 2;
FIG. 5 is an explanatory diagram after joining showing a joining procedure of the segments of FIG. 2;
6 is a cross-sectional view taken along the line AA in FIG.
FIG. 7 is a perspective view of a conventional segment joining structure.
[Explanation of symbols]
11 (11a, 11b) Segment 13 (13a, 13b) Joint surface 17 (17a, 17b, 17c, 17d) parallel to the shaft axis Joint metal fitting 19 (19a, 19b) Connection metal fitting 43 (43a, 43b) Sealing material

Claims (3)

坑道の周壁方向に接合されるセグメントの、坑軸に平行な接合面同士に断面C型の接合金具がそれぞれ設けられ、該接合金具同士が、断面I型の連結金具の両端部に係合され、隣接する一方のセグメントに対して坑道後端側から他方のセグメントが坑道先端側へ押し込まれることで、前記接合金具と該連結金具とに形成されたテーパ面同士が摺接されて、接合金具同士が引き寄せられ、隣接するセグメント同士が接合されるセグメントの接合構造において、
隣接する一方のセグメントの前記接合面に、坑道後端側から坑道先端側へ向かうにしたがって徐々に該接合面から突出されるシール材が貼着され、
隣接する他方のセグメントの前記接合面に、坑道前端側から坑道後端側へ向かうにしたがって徐々に該接合面から突出されるシール材が貼着されることを特徴とするセグメントの接合構造。
C-shaped joint fittings are provided on joint surfaces parallel to the well axis of the segments joined in the direction of the peripheral wall of the mine shaft, and the joint fittings are engaged with both end portions of the joint fitting having an I-type cross section. When the other segment is pushed from the rear end side of the tunnel to the adjacent tunnel segment, the taper surfaces formed on the joint fitting and the connection fitting are slidably contacted to each other. In the joint structure of the segments that are drawn together and adjacent segments are joined together,
To the joint surface of one of the adjacent segments, a seal material that gradually protrudes from the joint surface toward the tunnel tip side is attached to the joint surface,
A joining structure for a segment, wherein a sealing material that gradually protrudes from the joining surface is attached to the joining surface of the other adjacent segment gradually from the tunnel front end side toward the tunnel rear end side.
前記シール材の収容される前記溝がテーパ溝で形成され、前記シール材が均一な厚みで形成されることで前記シール材が前記接合面から徐々に突出されることを特徴とする請求項1記載のセグメントの接合構造。The groove for accommodating the sealing material is formed as a tapered groove, and the sealing material is formed with a uniform thickness so that the sealing material gradually protrudes from the joint surface. The joining structure of the described segment. 前記シール材の収容される溝が均一な深さの溝で形成され、前記シール材の厚みがテーパ状に形成されることで前記シール材が前記接合面から徐々に突出されることを特徴とする請求項1記載のセグメントの接合構造。The groove in which the sealing material is accommodated is formed with a groove having a uniform depth, and the sealing material is gradually projected from the joint surface by forming the sealing material in a tapered shape. The segment joining structure according to claim 1.
JP2000098277A 2000-03-31 2000-03-31 Segment joint structure Expired - Fee Related JP4316098B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007501345A (en) * 2003-08-06 2007-01-25 ジャイロ・ジャール−マルク Connecting device for connecting arcuate elements and arcuate structure produced thereby

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007501345A (en) * 2003-08-06 2007-01-25 ジャイロ・ジャール−マルク Connecting device for connecting arcuate elements and arcuate structure produced thereby
JP4680192B2 (en) * 2003-08-06 2011-05-11 ジャイロ・ジャール−マルク Connecting device for connecting arcuate elements and arcuate structure produced thereby

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