JP3253055B2 - Water stop device at reaching part in shield method - Google Patents
Water stop device at reaching part in shield methodInfo
- Publication number
- JP3253055B2 JP3253055B2 JP32943496A JP32943496A JP3253055B2 JP 3253055 B2 JP3253055 B2 JP 3253055B2 JP 32943496 A JP32943496 A JP 32943496A JP 32943496 A JP32943496 A JP 32943496A JP 3253055 B2 JP3253055 B2 JP 3253055B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- annular body
- groove
- annular groove
- flexible
- 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
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、シールド工法にお
ける到達部の止水装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water stopping device for a reaching part in a shield method.
【０００２】[0002]
【従来の技術】仮壁を直接シールドで切削して到達する
仮壁切削工法では、地下水圧の大きい施工場所における
確実な止水方法がないため、立坑内隔壁工法や薬液注入
などの地盤改良工法を併用することが多く、工期が長く
なる。2. Description of the Related Art In a temporary wall cutting method in which a temporary wall is directly cut with a shield, there is no reliable water stopping method at a construction site where groundwater pressure is high. Are often used together, and the construction period becomes longer.
【０００３】また、立坑壁とシールド機のスキンプレー
トとの間隙に、止水材を注入する方法では、止水材の量
が多く必要になり、更に、水の流れがある場合には、充
分な止水体が形成されない場合がある。[0003] In addition, in the method of injecting the water-stopping material into the gap between the shaft wall and the skin plate of the shield machine, a large amount of the water-stopping material is required. In some cases, a waterproof body is not formed.
【０００４】なお、本出願人は特許第２５１２２５７
号、特公平８−１９８２２号公報、特公平８−１９８２
３号公報において、チューブシールによるシールド機の
メカニカル接合方法及びその装置を提案している。[0004] The applicant of the present invention is Japanese Patent No. 2512257.
No., JP-B 8-19822, JP-B 8-1982
Japanese Patent Publication No. 3 proposes a method and an apparatus for mechanically joining a shield machine using a tube seal.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、地盤改良工
法を併用しないで、かつ、少ない止水材で止水性を向上
させることができるシールド工法における到達部の止水
装置を提供することを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to provide a water stopping device at a reaching part in a shield method in which the water stopping property can be improved with a small amount of water stopping material without using a ground improvement method. The purpose is.
【０００６】[0006]
【課題を解決するための手段】本発明のシールド工法に
おける到達部の止水装置によれば、シールド機のカッタ
ディスク（１）の外周には半径方向外方にジェット水
（３）を噴射する噴射口（２）を設け、そのカッタディ
スク（１）の後方に設けたスキンプレート（４）の前端
付近には逆Ｔ字状断面の環状溝（１０）が刻設され、そ
の環状溝（１０）の底部（１１）には注水管（１８）が
開口され、その底部（１１）の前側および後側に第１お
よび第２のフランジ溝（１２、１４）が形成され、その
環状溝（１０）には第１の可撓性板状環状体（１６）と
第２の可撓性板状環状体（１７）とが設けられ、第１の
可撓性板状環状体（１６）および第２の可撓性板状環状
体（１７）の前縁部は第１のフランジ溝（１２）に嵌入
され、第１の可撓性板状環状体（１６）の後縁部は前記
環状溝（１０）の後方の垂直面（１５）付近まで延びて
フリーになっており、そしてスキンプレート（４）の環
状溝（１０）の後方に止水材注入管（１９）が外周に開
口している。According to the water stopping device of the reaching part in the shield method according to the present invention, the jet water (3) is jetted radially outward on the outer periphery of the cutter disk (1) of the shield machine. An injection port (2) is provided, and an annular groove (10) having an inverted T-shaped cross section is engraved near the front end of a skin plate (4) provided behind the cutter disk (1). ) Is provided with a water inlet pipe (18) at its bottom (11), and first and second flange grooves (12, 14) are formed on the front and rear sides of the bottom (11), and its annular groove (10) is formed. ) Is provided with a first flexible plate-like annular body (16) and a second flexible plate-like annular body (17), and the first flexible plate-like annular body (16) and the first flexible plate-like annular body (16) are provided. The front edge of the second flexible plate-like annular body (17) is fitted into the first flange groove (12), and the first flexible The trailing edge of the annular body (16) extends near the vertical surface (15) behind the annular groove (10) and is free, and is located behind the annular groove (10) of the skin plate (4). A water-stop material injection pipe (19) is open on the outer periphery.
【０００７】[0007]
【０００８】本発明においては、スキンプレートの前端
が水を張った坑内に到達したら、水を注入して第１の可
撓性板状環状体を膨出し、これにより第２の板状環状体
を開いて坑壁との間隙をシールし、間隙に止水材を注入
する。According to the present invention, when the front end of the skin plate reaches the inside of the well filled with water, water is injected to swell the first flexible plate-like annular member, thereby forming the second plate-like annular member. Is opened to seal the gap with the pit wall, and the waterproof material is injected into the gap.
【０００９】[0009]
【発明の実施の形態】以下図面を参照して本発明の実施
の形態を説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１０】図１において、シールド機のカッタディス
ク１の外周には、複数の噴射口２が設けられ、半径方向
外方にジェット水３を噴射するようになっている。In FIG. 1, a plurality of injection ports 2 are provided on an outer periphery of a cutter disk 1 of a shield machine, and jet water 3 is injected outward in a radial direction.
【００１１】そのカッタディスク１の後方には、スキン
プレート４が設けられ、スキンプレート４の前端付近に
は、図２に示すような全体を符号１０で示す逆Ｔ字状断
面の環状溝が刻設されている。A skin plate 4 is provided at the back of the cutter disk 1. Near the front end of the skin plate 4, an annular groove having an inverted T-shaped cross section indicated by reference numeral 10 as shown in FIG. Has been established.
【００１２】その環状溝１０の底部１１の略中央には、
注水管１８が開口されている。その底部１１の前側に
は、第１のフランジ溝１２が形成され、このフランジ溝
１２には、半径方向外後方に延びるコーン状の傾斜面１
３が連続されている。また、底部１１の後側には、第１
のフランジ溝１２より薄い第２のフランジ溝１４が形成
され、このフランジ溝１４の前端には、半径方向外方に
向けた垂直面１５が連続されている。そして、この環状
溝１０には、第１、第２の可撓性環状体すなわちチュー
ブシール１６及びシール１７が設けられている。At the approximate center of the bottom 11 of the annular groove 10,
The water injection pipe 18 is open. A first flange groove 12 is formed on the front side of the bottom 11, and the flange groove 12 has a cone-shaped inclined surface 1 extending radially outward and rearward.
3 are consecutive. Also, on the rear side of the bottom part 11, the first
A second flange groove 14 that is thinner than the flange groove 12 is formed, and a vertical surface 15 facing outward in the radial direction is continuous with the front end of the flange groove 14. The annular groove 10 is provided with first and second flexible annular bodies, that is, a tube seal 16 and a seal 17.
【００１３】そのチューブシール１６の前縁部は、シー
ル１７の前縁部と共に第１のフランジ溝１２に嵌入され
ている。そして、チューブシール１６の後縁部は、第２
のフランジ溝１４に嵌入され、シール１７の後縁部は、
垂直面１５付近まで延ばされ、フリーになっている。ま
た、スキンプレート４の環状溝１０の後方付近の外周に
は、止水材注入管１９が開口されている。The front edge of the tube seal 16 is fitted into the first flange groove 12 together with the front edge of the seal 17. The rear edge of the tube seal 16 is
And the rear edge of the seal 17 is
It is extended to near the vertical plane 15 and is free. Further, on the outer periphery of the skin plate 4 near the rear of the annular groove 10, a water-stopping material injection pipe 19 is opened.
【００１４】次に、到達部の止水方法を説明する。Next, a method for stopping water at the reaching portion will be described.
【００１５】シールド機のカッディスク１の前面が到達
立坑の坑壁Ａに近付いたら、立坑の坑内Ｂの水を張ると
共に、噴射口２らかジェット水３を噴出しながら坑壁Ａ
を削孔し、コンクリート粉をジェット水３により飛散さ
せて掘進する。そして、スキンプレート４の前端が坑内
Ｂに到達したら、シールド機を停止し、ジェット水３の
噴射を止める。When the front surface of the shield disc 1 of the shield machine approaches the pit wall A of the reaching shaft, water is filled in the pit B of the pit, and jet water 3 is jetted from the injection port 2 to dig the wall A.
Is drilled, and concrete powder is scattered by the jet water 3 to excavate. When the front end of the skin plate 4 reaches the pit B, the shield machine is stopped and the jet of the jet water 3 is stopped.
【００１６】次いで、注水管１８から底部１１とチュー
ブシール１６との間に水Ｗを注入する。すると、チュー
ブシール１６は図３に示すように、半径方向外方に膨出
する。そのため、シール１７は傾斜面１３に沿って押し
拡げられ、フリーな後縁部は坑壁Ａに圧着されて坑壁Ａ
とスキンプレート４との間隙Ｃをシールする。そこで、
止水材２１を間隙Ｃに充填する。最後に坑内Ｂに張った
水を排水して終る。Next, water W is injected from the water injection pipe 18 between the bottom 11 and the tube seal 16. Then, the tube seal 16 swells radially outward as shown in FIG. Therefore, the seal 17 is pushed and expanded along the inclined surface 13, and the free trailing edge is pressed against the pit wall A and the pit wall A
And the gap C between the skin plate 4 is sealed. Therefore,
The gap C is filled with the water stopping material 21. Finally, drain the water stretched into mine B and finish.
【００１７】[0017]
【発明の効果】本発明は、以上説明したように構成され
ているので、以下に記載されているような効果を奏す
る。 （１） チューブシール及びシールにより機械的に止水
することができ、立坑内隔壁工法や薬液注入工法などの
地盤改良工法を併用することなく、立坑内に水を張るだ
けで到達させることができ、工期の短縮が可能となる。 （２） シールを立坑壁に密着させたのち、立坑内の水
を排水することで水圧をかけ、更に止水性を向上するこ
とができる。 （３） 止水材の注入量は、従来に比べて少量にするこ
とができる。Since the present invention is configured as described above, it has the following effects. (1) Water can be stopped mechanically by tube seals and seals, and water can be reached by simply filling the shaft without using ground improvement methods such as vertical shaft partitioning method and chemical liquid injection method. Thus, the construction period can be shortened. (2) After the seal is brought into close contact with the shaft wall, the water in the shaft is drained to apply water pressure, thereby further improving the water stopping performance. (3) The injection amount of the waterproof material can be made smaller than before.
【図１】本発明の装置の実施の一形態を示す止水状態前
の状態を示す側断面図。FIG. 1 is a side cross-sectional view showing a state before a water stop state according to an embodiment of the apparatus of the present invention.
【図２】環状溝の詳細を示す側断面図。FIG. 2 is a side sectional view showing details of an annular groove.
【図３】止水状態を示す側断面図。FIG. 3 is a side sectional view showing a water stop state.
Ａ・・・坑壁 Ｂ・・・坑内 １・・・カッタディスク ２・・・噴射口 ３・・・ジェット水 ４・・・スキンプレート １０・・・環状溝 １１・・・底部 １２・・・第１のフランジ溝 １３・・・傾斜面 １４・・・第２のフランジ溝 １５・・・垂直面 １６・・・チューブシール １７・・・シール １８・・・注水管 １９・・・止水材注入管 ２０・・・水 ２１・・・止水材 A: Downhole B: Downhole 1 ... Cutter disk 2 ... Injection port 3 ... Jet water 4 ... Skin plate 10 ... Annular groove 11 ... Bottom 12 ... 1st flange groove 13 ... Slope surface 14 ... 2nd flange groove 15 ... Vertical surface 16 ... Tube seal 17 ... Seal 18 ... Injection pipe 19 ... Water stop material Injection pipe 20 ・ ・ ・ Water 21 ・ ・ ・ Waterproof material
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平８−184292（ＪＰ，Ａ) 特開 昭53−28930（ＪＰ，Ａ) 特開 昭62−21995（ＪＰ，Ａ) 特開 平８−93390（ＪＰ，Ａ) 実開 平３−21496（ＪＰ，Ｕ) 実開 平２−54893（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) E21D 9/06 301 E21D 11/38 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-184292 (JP, A) JP-A-53-28930 (JP, A) JP-A-62-21995 (JP, A) 93390 (JP, A) Japanese Utility Model Application Hei 3-21496 (JP, U) Japanese Utility Model Application Hei 2-54893 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) E21D 9/06 301 E21D 11/38
Claims (1)
周には半径方向外方にジェット水（３）を噴射する噴射
口（２）を設け、そのカッタディスク（１）の後方に設
けたスキンプレート（４）の前端付近には逆Ｔ字状断面
の環状溝（１０）が刻設され、その環状溝（１０）の底
部（１１）には注水管（１８）が開口され、その底部
（１１）の前側および後側に第１および第２のフランジ
溝（１２、１４）が形成され、その環状溝（１０）には
第１の可撓性板状環状体（１６）と第２の可撓性板状環
状体（１７）とが設けられ、第１の可撓性板状環状体
（１６）および第２の可撓性板状環状体（１７）の前縁
部は第１のフランジ溝（１２）に嵌入され、第１の可撓
性板状環状体（１６）の後縁部は前記環状溝（１０）の
後方の垂直面（１５）付近まで延びてフリーになってお
り、そしてスキンプレート（４）の環状溝（１０）の後
方に止水材注入管（１９）が外周に開口していることを
特徴とするシールド工法における到達部の止水装置。1. An outer periphery of a cutter disc (1) of a shield machine is provided with a jet (2) for jetting jet water (3) radially outward, and a skin provided behind the cutter disc (1). Near the front end of the plate (4), an annular groove (10) having an inverted T-shaped cross section is engraved, and a water injection pipe (18) is opened at the bottom (11) of the annular groove (10). First and second flange grooves (12, 14) are formed on the front side and the rear side of 11), and the annular groove (10) has a first flexible plate-like annular body (16) and a second flexible groove. A flexible plate-shaped annular body (17) is provided, and the front edges of the first flexible plate-shaped annular body (16) and the second flexible plate-shaped annular body (17) are the first flexible annular body (17). The rear edge of the first flexible plate-like annular body (16) is fitted into the flange groove (12) and has a vertical surface (15) behind the annular groove (10). A reaching part in a shield method, characterized in that it extends close to and is free, and a water-stop material injection pipe (19) is opened on the outer periphery behind the annular groove (10) of the skin plate (4). Water stop device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32943496A JP3253055B2 (en) | 1996-12-10 | 1996-12-10 | Water stop device at reaching part in shield method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32943496A JP3253055B2 (en) | 1996-12-10 | 1996-12-10 | Water stop device at reaching part in shield method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10169363A JPH10169363A (en) | 1998-06-23 |
| JP3253055B2 true JP3253055B2 (en) | 2002-02-04 |
Family
ID=18221339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32943496A Expired - Fee Related JP3253055B2 (en) | 1996-12-10 | 1996-12-10 | Water stop device at reaching part in shield method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3253055B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4968670B2 (en) * | 2006-09-19 | 2012-07-04 | 株式会社アルファシビルエンジニアリング | Water stop device installed in the excavator |
-
1996
- 1996-12-10 JP JP32943496A patent/JP3253055B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10169363A (en) | 1998-06-23 |
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