JP3388386B2 - Tail seal of shield machine - Google Patents
Tail seal of shield machineInfo
- Publication number
- JP3388386B2 JP3388386B2 JP32079098A JP32079098A JP3388386B2 JP 3388386 B2 JP3388386 B2 JP 3388386B2 JP 32079098 A JP32079098 A JP 32079098A JP 32079098 A JP32079098 A JP 32079098A JP 3388386 B2 JP3388386 B2 JP 3388386B2
- Authority
- JP
- Japan
- Prior art keywords
- tubular material
- shield machine
- peripheral surface
- seal
- lining
- 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
Landscapes
- Lining And Supports For Tunnels (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、シールド掘進機の
スキンプレートの後端内にて組み立てられた覆工と、ス
キンプレートとの間の隙間をシールするシールド掘進機
のテールシールに関する。
【０００２】
【従来の技術】一般にシールド工法においては、シール
ド掘進機のテール部内面にてセグメントをリング状に組
み立てて覆工を延長させ、これに反力を取って掘進機を
押し出しつつ掘進するようにしている。シールド掘進機
内で組み立てられる覆工外径は、シールド掘進機のスキ
ンプレート内径より小さいため、施工状況に応じた隙間
（以下テールクリアランスと記す）が生じている。
【０００３】このためテール部では、このテールクリア
ランスから地下水や裏込材等がシールド掘進機内に侵入
するのを防止するため、図８に示すように、スキンプレ
ート１のテール部内面に、覆工２の外周面に摺接するテ
ールシール３が設置されている。このテールシール３
は、一般に、円周方向に連続させたリング状のワイヤブ
ラシ４，４を２段乃至３段に設置し、その各ワイヤブラ
シ４の前面側に保護バネ６を設置するとともに、各該ワ
イヤブラシ４内及び両ワイヤブラシ４，４間にテールグ
リス５を充填したものが使用されている。
【０００４】このようなシールド掘進機におけるトンネ
ル施工において、上下左右方向の曲線施工時には、図９
に示すようなシールド掘進機７の掘進方向制御によっ
て、掘進機７の中心線方向Ｘ１とその内部で組み立てら
れた覆工２の中心線方向Ｘ２に角度を生じ、テールクリ
アランス内において、覆工後端が円周方向の何れかに偏
ることとなるが、その偏りを前記テールシール３の弾力
によって吸収し、その吸収許容範囲内にて曲線施工が可
能となっている。
【０００５】
【発明が解決しようとする課題】上述の如き従来のシー
ルド掘進機においては、テールシールのフリクションの
範囲内にて曲線施工が可能となっているものであるが、
掘進施工中にテールグリスが漏出し、裏込材がワイヤブ
ラシ間に詰まり、テールシールのフリクション範囲が当
初に比べて小さくなっていることが多く、予め設定され
た曲線施工に耐えない状態となり、無理に掘進作業を続
行すると、シールド掘進機の推進力の増加、覆工やテー
ルシールの損傷等を招き、その結果、裏込材や土砂や地
下水のシールド掘進機内への流入、テールシールパテグ
リスの浪費等の問題が生じる。
【０００６】このような問題は、今後、長距離施工、即
ち、縦坑間の長さを長くし、同一シールド掘進機で長い
距離の掘進を行う施工や、曲率半径を小さくした急曲線
施工が求められつつある今日、これらの問題は特に重要
事項となっている。
【０００７】また、大深度、高水圧条件下での施工にお
いては、ワイヤブラシを三重配置取り付けているが、こ
の場合には、テールシール部分が長くなり、その結果、
シールド掘進機の機長が長くなるとともに、覆工と掘進
機の中心線方向角度の許容差が小さくなり、曲線施工に
支障を来たす等の問題があった。
【０００８】本発明は、このような従来の問題に鑑み、
シールド掘進機の機長を短くできるとともに、曲線施工
時の覆工と掘進機の軸方向の角度差を大きくでき、しか
も覆工とスキンプレートの競りが緩和され、更に止水性
に優れたテールシールの提供を目的としてなされたもの
である。
【０００９】
【課題を解決するための手段】上述の如き従来の問題を
解決し、所期の目的を達成するための本発明の特徴は、
シールド掘進機におけるスキンプレートの後端部内周面
に不等水性で柔軟性を有するチューブ状材の前端を固定
し、該チューブ状材の後端側内周面には、覆工の外周面
に摺動自在に圧接され、該覆工外周面を弾性的に締め付
けるシール部を備え、該シール部を、チューブ状材の後
端側内面に固定したワイヤブラシをもって構成してなる
シールド掘進機のテールシールにおいて、前記チューブ
状材の肉厚内に、多数の帯状のワイヤブラシ用鋼線束を
前記チューブ状材の円周方向に間隔を隔てた平行配置に
埋設し、その各ワイヤブラシ用鋼線束を厚さ方向に複数
層に分割し、その分割層毎にチューブ状材の軸方向に間
隔を隔てて先端を該チューブ状材の内周面に突出させる
ことによりワイヤブラシを多段配置に設けたことを特徴
としてなるシールド掘進機のテールシールに存する。
【００１０】
【発明の実施の形態】次に本発明の実施の形態を図面に
ついて説明する。
【００１１】図１は、本発明の第１実施形態を示してお
り、図において１０はシールド掘進機のスキンプレー
ト、１１はセグメント組立による覆工、１２は覆工１１
に反力を取ってシールド掘進機を推進させるシールドジ
ャッキであり、１３Ｂはスキンプレート１０の後端に固
定されたテールシールである。
【００１２】このテールシール１３Ｂは、不透水性で軟
性のある円筒状をしたチューブ状材２０と、その後端部
内面の三重配置のワイヤブラシ２１ａ，２１ｂ，２１ｃ
からなるシール部２１とから構成されている。
【００１３】チューブ状材２０は、その前端がスキンプ
レート１０の後端内面の拡径部１０ａ内に嵌め込まれて
止めネジ１６，１６によって固定され、後端部側がスキ
ンプレート１０の後方に吹き流し状に延長されており、
チューブ状材２０の前端は、スキンプレート後端の拡径
部１０ａ内に嵌め込まれて止めネジ１６，１６によって
固定される程に成形されているが、その後端部側は、そ
の内面と覆工１１との間にワイヤブラシ２１ａ〜２１ｃ
が介在する隙間ができる程に成形されている。
【００１４】チューブ状材２０の肉厚内には、長手方向
に向けた多数の帯状のワイヤブラシ用鋼線束２２，２２
…が円周方向に略等間隔な平行配置に埋め込まれてお
り、その各鋼線束２２の後端を厚さ方向に３分割して分
割層を形成し、この各分割層をそれぞれ順にチューブ状
材の軸方向に間隔を隔ててチューブ状材２０の内面側に
折り曲げて突出させ、それぞれの折り曲げ端部側を拡開
させて円周方向に連続した三重配置のワイヤブラシ２１
ａ〜２１ｃを構成している。
【００１５】これらの各ワイヤブラシ２１ａ〜２１ｃの
先端が覆工１１の外周面に弾性的に圧接されてシールが
なされるようになっている。
【００１６】
【発明の効果】上述したように、本発明のシールド掘進
機のテールシールにおいては、不透水性で柔軟性を有す
るチューブ状材の前端を前記スキンプレートの後端部内
周面に固定し、該チューブ状材の後端側内周面に、前記
覆工の外周面に摺動自在に圧接され、該覆工外周面を弾
性的に締め付けるシール部を備えたことにより、テール
シールがシールド掘進機の後方側に吹き流し状に延長さ
れることとなり、このため、シールド掘進機の機長を短
くでき、急曲線施工が容易となる。
【００１７】また、テールシールを構成するチューブ状
材は、柔軟性を有するものであるため、シールド掘進機
と覆工の中心線方向に角度から生じてもこれに容易に追
随し、その角度が大きくても競り合いを生じさせないよ
うにでき、また、このため、シール部に局部的に応力が
集中することもなく、覆工外周面において、略均一なシ
ール状態が得られることとなり、シールが損傷し難く、
耐久性を高いものとできる。
【００１８】更に、高水圧条件下において使用する場合
には、チューブ状材が外圧によって覆工外面を締め付け
る方向に作用し、高いシール性が得られる。
【００１９】また、シール部を、チューブ状材の後端側
内面に固定したワイヤブラシをもって構成することによ
り、耐久性の高いシール部となる。
【００２０】更に、チューブ状材の肉厚内に、その前端
部から後端側に向けて多数のワイヤブラシ用鋼線束を埋
設し、該鋼線束の後端側を前記チューブ状材の後端部内
周面に突出させてシール部を構成することにより、チュ
ーブ状材の強度をワイヤブラシ用の鋼線によって補強す
ることとなり、より耐久性の高いものとなる。
【００２１】更に、チューブ状材の肉厚内に、多数の帯
状のワイヤブラシ用鋼線束を該チューブ状材の円周方向
に間隔を隔てた平行配置に埋設し、その各ワイヤブラシ
用鋼線束を厚さ方向に複数層に分割し、その分割層毎に
チューブ状材の軸方向に間隔を隔てて先端を該チューブ
状材の内周面に突出させることによりワイヤブラシを多
段配置に設けたことにより、チューブ状材に対して多段
配置のワイヤブラシを好適に一体化させることができ、
しかもチューブ状材の周方向の柔軟性を損なうことなく
補強できる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention seals a gap between a lining assembled in a rear end of a skin plate of a shield machine and a skin plate. The present invention relates to a tail seal of a shield machine. 2. Description of the Related Art In general, in a shield construction method, segments are assembled in a ring shape on the inner surface of a tail portion of a shield machine to extend a lining, and the excavator is excavated while taking a reaction force against the lining. Like that. Since the outside diameter of the lining assembled in the shield machine is smaller than the inner diameter of the skin plate of the shield machine, a gap (hereinafter referred to as a tail clearance) according to the construction condition is generated. [0003] Therefore, in order to prevent groundwater, backing material, and the like from entering the shield machine from the tail clearance, as shown in FIG. A tail seal 3 that is in sliding contact with the outer peripheral surface of 2 is installed. This tail seal 3
In general, ring-shaped wire brushes 4 and 4 continuously arranged in a circumferential direction are installed in two or three stages, a protection spring 6 is installed on the front side of each wire brush 4, and each of the wire brushes The one filled with tail grease 5 inside and between both wire brushes 4, 4 is used. [0004] In the tunnel construction in such a shield excavator, when constructing a curve in the vertical and horizontal directions, FIG.
As shown in the figure, the angle of the excavation direction control of the shield excavator 7 generates an angle between the center line direction X1 of the excavator 7 and the center line direction X2 of the lining 2 assembled therein, and the lining after the lining Although the end is deviated in any of the circumferential directions, the deviation is absorbed by the elasticity of the tail seal 3, and the curve construction is possible within the allowable absorption range. [0005] In the conventional shield machine described above, the curve construction can be performed within the range of the friction of the tail seal.
Tail grease leaks during excavation work, the backing material is clogged between the wire brushes, and the friction range of the tail seal is often smaller than at the beginning, and it is in a state that can not withstand the preset curve construction, Forcing the excavation work will increase the propulsion of the shield excavator, damage the lining and the tail seal, etc. As a result, backing material, earth and sand and groundwater will flow into the shield excavator, and the tail seal pate grease The problem of waste of money etc. arises. [0006] Such a problem will be solved in the future by long-distance construction, that is, construction in which the length between shafts is lengthened and excavation is performed over a long distance with the same shield excavator, and sharp curve construction in which the radius of curvature is reduced. Today, these issues are of particular importance. [0007] Further, in the case of construction under the condition of large depth and high water pressure, the wire brushes are mounted in a triple arrangement. In this case, the tail seal portion becomes long, and as a result,
As the length of the shield machine becomes longer, the tolerance of the angle between the lining and the machine in the direction of the center line becomes smaller, which causes problems such as hindering curve construction. The present invention has been made in view of such a conventional problem,
The length of the shield excavator can be shortened, the angle difference between the lining and the excavator during curve construction in the axial direction can be increased, and the competition between the lining and the skin plate is eased. It was made for the purpose of providing. [0009] The features of the present invention for solving the conventional problems as described above and achieving the intended object are as follows.
Inner peripheral surface of the rear end of skin plate in shield machine
Fix the front end of unequal water and flexible tubular material
The inner peripheral surface of the rear end side of the tubular material has an outer peripheral surface of a lining.
Is slidably pressed to the outer surface of the lining and elastically tightened.
And a sealing part which is provided after the tubular material.
Consists of a wire brush fixed to the inner surface on the end side
In the tail seal of the shield machine, the tube
A large number of strip-shaped steel wire bundles for wire brush
In parallel arrangement spaced apart in the circumferential direction of the tubular material
Embed the steel wire bundle for each wire brush in the thickness direction
The tube is divided into layers, and each layer is separated in the axial direction of the tubular material.
The tip is projected to the inner peripheral surface of the tubular material with a gap
The feature is that the wire brush is provided in a multi-stage arrangement
It exists in the tail seal of the shield machine . Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. In FIG. 1, reference numeral 10 denotes a skin plate of a shield machine, 11 denotes a lining by segment assembly, and 12 denotes a lining 11
And a tail seal 13B fixed to the rear end of the skin plate 10. The tail seal 13B is made of a tubular material 20 having a water-impermeable and soft cylindrical shape, and wire brushes 21a, 21b and 21c arranged on the inner surface of its rear end in a triple arrangement.
And a seal portion 21 made of. The tubular member 20 has its front end fitted into the enlarged diameter portion 10a on the inner surface of the rear end of the skin plate 10 and is fixed by set screws 16, 16, and its rear end side is blown backward to the skin plate 10. Has been extended to
The front end of the tubular material 20 is formed so as to be fitted into the enlarged diameter portion 10a at the rear end of the skin plate and fixed by the setscrews 16 and 16, and the rear end side is covered with the inner surface thereof. 11 and wire brushes 21a to 21c
Are formed so that a gap is formed therebetween. Within the thickness of the tubular member 20, a number of strip-shaped steel wire bundles 22 for the wire brush extending in the longitudinal direction are provided.
Min ... are embedded substantially equally spaced parallel arrangement in the circumferential direction, and 3 divides the rear end of each steel wire bundles 22 in the thickness direction
The split layers are formed, and each of the split layers is sequentially tubular.
The wire brush 21 is bent and projected toward the inner surface side of the tubular material 20 at an interval in the axial direction of the material, and each bent end portion is expanded to continuously extend in the circumferential direction.
a to 21c. The tip of each of the wire brushes 21a to 21c is elastically pressed against the outer peripheral surface of the lining 11 so that a seal is made. As described above, in the tail seal of the shield machine according to the present invention, the front end of the water-impermeable and flexible tubular material is fixed to the inner peripheral surface of the rear end of the skin plate. A tail seal is provided on the inner peripheral surface on the rear end side of the tubular member so as to be slidably pressed against the outer peripheral surface of the lining and to elastically tighten the outer peripheral surface of the lining. The shield excavator is extended in a streamer-like manner behind the shield excavator. Therefore, the length of the shield excavator can be shortened, and the construction with a sharp curve becomes easy. Further, since the tubular material constituting the tail seal has flexibility, even if it is generated from an angle in the direction of the center line of the shield machine and the lining, it easily follows the angle, and the angle is changed. Even if it is large, it is possible to prevent competition, and therefore, stress is not locally concentrated on the seal portion, and a substantially uniform sealing state is obtained on the outer peripheral surface of the lining, and the seal is damaged. Hard to do,
High durability can be achieved. Further, when used under high water pressure conditions, the tubular material acts in the direction of tightening the outer surface of the lining due to the external pressure, and high sealing properties can be obtained. Further, by forming the seal portion with a wire brush fixed to the inner surface on the rear end side of the tubular material, a highly durable seal portion is obtained. Furthermore, in the wall thickness of the tubular member, embedded steel wire bundles for multiple wire brush toward the rear side from its front end, a rear end of the steel wire bundles of the tubular member By forming the seal portion by protruding from the inner peripheral surface of the rear end portion, the strength of the tubular material is reinforced by the steel wire for the wire brush, and the durability becomes higher. Further, a number of bands are provided within the thickness of the tubular material.
Wire bundle for wire brush in the circumferential direction of the tubular material
The steel wire bundle for the wire brush is divided into a plurality of layers in the thickness direction, and the tip end of the tube is spaced apart in the axial direction of the tubular material for each of the divided layers. multi more wire brush to be protruded on the inner peripheral surface of the Jo material
By providing in the step arrangement, the wire brush of the multi-step arrangement can be suitably integrated with the tubular material,
Moreover, reinforcement can be performed without impairing the circumferential flexibility of the tubular member.
【図面の簡単な説明】
【図１】本発明の実施形態を示す断面図である。
【図２】同上のテールシールの拡大断面図である。
【図３】同上のテールシールの一部を展開して示す平面
図である。
【図４】同上のワイヤブラシ及び鋼線束部分を示す平面
図である。
【図５】図３中のＡ−Ａ線断面図である。
【図６】図２中のＢ−Ｂ線断面図である。
【図７】従来のテールシールを示す断面図である。
【図８】従来のシールド掘進機による曲線施工状態を示
す説明図である。
【符号の説明】
１０ スキンプレート
１０ａ 拡径部
１１ 覆工
１２ シールドジャッキ
１３Ｂ テールシール
１６ 止めネジ
２０ チューブ状材
２１ シール部
２１ａ，２１ｂ，２１ｃ ワイヤブラシ
２２ 鋼線束BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of the present invention. FIG. 2 is an enlarged sectional view of the tail seal according to the first embodiment; FIG. 3 is a plan view showing a part of the tail seal in the same manner as shown in FIG. FIG. 4 is a plan view showing a wire brush and a steel wire bundle portion of the same. FIG. 5 is a sectional view taken along line AA in FIG. 3; FIG. 6 is a sectional view taken along line BB in FIG. 2; FIG. 7 is a sectional view showing a conventional tail seal. FIG. 8 is an explanatory view showing a curved construction state by a conventional shield machine. [Description of Signs] 10 Skin plate 10a Large diameter portion 11 Lining 12 Shield jack 13B Tail seal 16 Set screw 20 Tubular material 21 Seal portions 21a, 21b, 21c Wire brush 22 Steel wire bundle
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭55−178095（ＪＰ，Ｕ) 実公 昭57−16955（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) E21D 11/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 55-178095 (JP, U) Japanese Utility Model Sho 57-16955 (JP, Y2) (58) Fields investigated (Int. Cl. 7 , DB name) E21D 11/00
Claims (1)
後端部内周面に不等水性で柔軟性を有するチューブ状材
の前端を固定し、該チューブ状材の後端側内周面には、
覆工の外周面に摺動自在に圧接され、該覆工外周面を弾
性的に締め付けるシール部を備え、該シール部を、チュ
ーブ状材の後端側内面に固定したワイヤブラシをもって
構成してなるシールド掘進機のテールシールにおいて、 前記チューブ状材の肉厚内に、多数の帯状のワイヤブラ
シ用鋼線束を前記チューブ状材の円周方向に間隔を隔て
た平行配置に埋設し、その各ワイヤブラシ用鋼線束を厚
さ方向に複数層に分割し、その分割層毎にチューブ状材
の軸方向に間隔を隔てて先端を該チューブ状材の内周面
に突出させることによりワイヤブラシを多段配置に設け
たことを特徴としてなるシールド掘進機のテールシー
ル。 (57) [Claims] [Claim 1] Skin plate in shield machine
Tubular material with unequal water and flexibility on the inner peripheral surface of the rear end
The front end of the tubular material is fixed, and on the inner peripheral surface on the rear end side of the tubular material,
It is slidably pressed against the outer peripheral surface of the lining, and
A sexually tightened seal, and the seal is
Hold the wire brush fixed on the inner surface of the
In the tail seal of the shield machine described above, a large number of band-shaped wire brass is provided within the thickness of the tubular material.
The steel wire bundle for sieve is spaced apart in the circumferential direction of the tubular material.
Buried in a parallel arrangement and the thickness of each wire brush steel wire bundle
Divided into multiple layers in the direction
The distal end of the tubular material is spaced apart in the axial direction of the inner peripheral surface of the tubular material.
The wire brushes are arranged in multiple stages by projecting
Tail sea of shield machine
Le.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32079098A JP3388386B2 (en) | 1998-11-11 | 1998-11-11 | Tail seal of shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32079098A JP3388386B2 (en) | 1998-11-11 | 1998-11-11 | Tail seal of shield machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000145380A JP2000145380A (en) | 2000-05-26 |
| JP3388386B2 true JP3388386B2 (en) | 2003-03-17 |
Family
ID=18125282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32079098A Expired - Lifetime JP3388386B2 (en) | 1998-11-11 | 1998-11-11 | Tail seal of shield machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3388386B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5934598B2 (en) * | 2012-07-27 | 2016-06-15 | 鹿島建設株式会社 | Shield machine |
| JP7036331B1 (en) * | 2021-10-13 | 2022-03-15 | ゴメスインターナショナル インク | Shield Machine tail seal |
-
1998
- 1998-11-11 JP JP32079098A patent/JP3388386B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000145380A (en) | 2000-05-26 |
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