JP3406075B2 - Intermediate sleeve tube for propulsion method - Google Patents
Intermediate sleeve tube for propulsion methodInfo
- Publication number
- JP3406075B2 JP3406075B2 JP20119394A JP20119394A JP3406075B2 JP 3406075 B2 JP3406075 B2 JP 3406075B2 JP 20119394 A JP20119394 A JP 20119394A JP 20119394 A JP20119394 A JP 20119394A JP 3406075 B2 JP3406075 B2 JP 3406075B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- pipe
- receiving
- intermediate sleeve
- propulsion
- 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
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】
【0001】
【産業上の利用分野】本発明は推進工法用の中間スリー
ブ管に関する。
【0002】
【従来の技術】管路を地中に敷設するための工法の一つ
として、推進工法が知られている。これは、図2に示す
ように地表から発進坑1を開削してその内部に元押しジ
ャッキ2を配置し、この元押しジャッキ2によって推進
管3を地中に推進させ、一つの管3を地中に推進させた
なら発進坑1内で次の推進管3を継ぎ足して同様に推進
させ、この作業を順に繰り返すものである。4は先導管
である。
【0003】この推進工法において、多数の推進管3を
接合して推進を行うと、管の外周と土との摩擦抵抗力C
が推進管3の強度を超える場合があり、好ましくない。
そこで、その場合の対策として、従来から中間スリーブ
工法が知られている。この中間スリーブ工法において
は、図2に示すように、推進区間の推進管3どうしの間
に、中間ジャッキを備えた伸縮構造の中間スリーブ管5
を配置し、元押しと中押しとの併用により管3を推進す
る。
【0004】詳細には、図2に示すように管3の外周と
土との摩擦抵抗力Cが管3の強度以下の場合は、中間ス
リーブ管5を縮めた状態で、この中間スリーブ管5は作
動させずに、元押しジャッキ2の推進力Aのみによって
推進を行う。図3に示すように管3と土との摩擦抵抗力
Cが管3の強度に近づけば、元押しジャッキ2は作動さ
せずに、中間スリーブ管5の中間ジャッキの推進力Bに
よりこの中間スリーブ管5を伸長させて、この中間スリ
ーブ管5よりも前側の管3のみを推進させる。そして中
間ジャッキのストロークがいっぱいになれば、図4に示
すように、中間スリーブ管5よりも後側の管3を元押し
ジャッキ2の推進力Aによって推進させ、中間ジャッキ
のストロークを回復させる。
【0005】図5は、中間スリーブ管5の詳細構造を示
す。図示のように、この中間スリーブ管5は、受口管7
と、この受口管7の内部に軸心方向に移動自在に挿入さ
れた挿口管8とを有した構造となっている。挿口管8の
先端と受口管7の奥端突部9との間には、管軸心方向に
伸縮する中間ジャッキ10がわたされている。この中間ジ
ャッキ10は、管の周方向に複数が設けられ、その伸縮に
より受口管7と挿口管8とを軸心方向に相対的に移動さ
せることによって、中間スリーブ管5を伸縮させて前述
の推進力Bを発生させる。
【0006】挿口管8には、受口管7の先端部の外周を
覆う筒状の土砂流入防止板12が取り付けられている。こ
の土砂流入防止板12は、挿口管8と受口管7とが軸心方
向に相対的に移動して中間スリーブ管5が伸縮したとき
に、受口挿口間に周囲の土砂が流入するのを防止するた
めのものである。この土砂の流入を確実に防止するため
に、土砂流入防止板12の内周と受口管7の外周との間に
は環状のシール材13が配置されている。このシール材13
の両側にはバックアップリング14、15が設けられてい
る。そして、押輪16からボルト17をねじ出してシール材
13を圧縮することで、所定のシール機能が得られるよう
に構成されている。
【0007】奥端突部9よりも先端側における受口管7
の内周にはテーパ状のシール材圧接面18が形成され、こ
のシール材圧接面18よりも奥側の位置における受口管7
の内面には突部19が形成されている。
【0008】推進工事が終了したなら、受口管7と挿口
管8とを管内接合する。その場合には、あらためて中間
ジャッキ10を伸長させて、挿口管8の先端部が受口管7
のシール材圧接面18に対応して位置するように、これら
受口管7と挿口管8とを軸心方向に相対移動させる。そ
のうえで中間ジャッキ10を取り外し、図6に示すよう
に、シール材圧接面18と挿口管8の外周面との間に環状
のシール材20を配置し、このシール材20に割輪21を介し
て押輪22をあてがう。そして突部19に中輪23を係り合わ
せ、押輪22からねじ出されるボルト24により継ぎ棒25を
介してこの中輪23を押すときの反力によって、シール材
20に圧縮力を付与し、所定のシール機能を得る。
【0009】なお、図6には、受口管7と、この受口管
7に接合される推進管3の挿口27との間の継手部28もが
図示されている。挿口管8の端部の挿口29は、継手部28
と同様の継手構造を利用して、この挿口管8に接続され
る他の推進管の受口に接合される。
【0010】
【発明が解決しようとする課題】しかしながら、このよ
うな構成では、上述のように推進工事が終了した後に中
間ジャッキ10を伸長させて受口管7と挿口管8とを軸心
方向に相対移動させても、その後に中間ジャッキ10をゆ
るめて取り外したときに、再び挿口管8が受口管7の奥
側に入り込んでくる場合があり、シール材を設置するた
めの所定の寸法を確保しにくくなるおそれがあるという
問題点を有する。
【0011】そこで本発明はこのような問題点を解決
し、中間ジャッキの取り外しの際に挿口管が受口管の中
に入り込んでも、それに対処して適切にシール材を設置
できるようにすることを目的とする。
【0012】
【課題を解決するための手段】この目的を達成するため
本発明は、挿口管の先端外周と受口管の内周との間に配
置される環状のシール材と、このシール材を圧縮可能な
押輪と、この押輪からねじ出されるボルトと、前記ボル
トに係り合うように受口管の内部に設けられた中輪と、
受口管の奥部の内周に形成された突部と、この突部と前
記中輪との間に配置されて、前記中輪を管軸方向の任意
の位置に移動させて固定させるターンバックルとを有す
るようにしたものである。
【0013】
【作用】このような構成において、推進工事が終了した
なら、あらためて中間ジャッキを伸長させて、挿口管と
受口管とがシール材の設置に適した配置となるようにこ
れらの管を軸心方向に相対移動させたうえで、この中間
ジャッキを取り外す。このとき、挿口管が再び受口管の
奥側に入り込んだなら、それに対応してターンバックル
を操作し、管軸方向に沿った中輪の位置を調節する。そ
して、この中輪に係り合うボルトのねじ出しにより、押
輪を介して適切にシール材が圧縮される。
【0014】
【実施例】以下、本発明の一実施例を、図1にもとづ
き、上記において説明した図2〜図6に示されたものと
同一の部材には同一の参照番号を付して、詳細に説明す
る。
【0015】図示のように、受口管7の奥端突部9に
は、シール材圧接面18の側へ向けて延びる管軸方向の植
え込みボルト31が、周方向に間隔をおいて複数植え込ま
れて固定されている。各植え込みボルト31の先端には、
管軸方向のターンバックル32の一端側がねじ合わされて
おり、これら周方向に複数のターンバックル32の他端側
には管軸方向の他のボルト33がねじ合わされている。各
ボルト33の先端は、中輪23の側面に溶接により固定され
ている。34はその溶接部である。
【0016】このような構成において、推進工事の終了
後には中間ジャッキを取り外すが、そのときに挿口管8
が再び受口管7の奥側に入り込んだなら、各ターンバッ
クル32を操作して中輪23を管軸方向に移動させ、挿口管
8の入り込み量に応じた位置にこの中輪23を固定させ
る。
【0017】そして、図6に示したものと同様にシール
材圧接面18と挿口管8の外周面との間に環状のシール材
20を配置し、同様に割輪21と押輪22とを配置し、押輪22
からねじ出されるボルト24で継ぎ棒25を介して中輪23を
押すときの反力によって、シール材に圧縮力を付与して
所定のシール機能を得る。このとき、挿口管8の入り込
み量に応じた位置に中輪23を配置できるため、その他の
割輪21や押輪22やボルト24や継ぎ棒25なども適正に配置
でき、受口管7と挿口管8とを確実に接合することがで
きる。
【0018】
【発明の効果】以上述べたように本発明によると、ター
ンバックルによって中輪を管軸方向に移動させて固定さ
せることができるため、中間ジャッキの取外し後の受口
管の奥側への挿口管の入り込みの程度に応じた最適の位
置に中輪を配置することができ、この挿口管の入り込み
の程度にかかわらず受口管と挿口管との間を常に適切に
シールすることができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate sleeve tube for a propulsion method. 2. Description of the Related Art A propulsion method is known as one of the methods for laying a pipeline in the ground. In this method, as shown in FIG. 2, the starting pit 1 is cut from the surface of the ground, and a main pushing jack 2 is arranged therein. If it is propelled underground, the next propulsion pipe 3 is added in the starting pit 1 and propelled similarly, and this operation is repeated in order. Reference numeral 4 denotes a leading conduit. [0003] In this propulsion method, when a large number of propulsion pipes 3 are joined and propelled, the frictional resistance C between the outer circumference of the pipes and the soil is increased.
May exceed the strength of the propulsion pipe 3, which is not preferable.
Therefore, as a countermeasure in that case, an intermediate sleeve method has been conventionally known. In this intermediate sleeve construction method, as shown in FIG. 2, an intermediate sleeve pipe 5 having a telescopic structure provided with an intermediate jack is provided between the propulsion pipes 3 in the propulsion section.
Is arranged, and the pipe 3 is propelled by the combination of the original pushing and the middle pushing. More specifically, as shown in FIG. 2, when the frictional resistance C between the outer periphery of the pipe 3 and the soil is lower than the strength of the pipe 3, the intermediate sleeve pipe 5 is contracted in a state where the intermediate sleeve pipe 5 is contracted. Is not operated, and propulsion is performed only by the propulsive force A of the main push jack 2. As shown in FIG. 3, when the frictional resistance C between the pipe 3 and the soil approaches the strength of the pipe 3, the original pushing jack 2 is not operated, and the intermediate sleeve is driven by the propulsion B of the intermediate jack of the intermediate sleeve pipe 5. The tube 5 is extended so that only the tube 3 ahead of the intermediate sleeve tube 5 is propelled. Then, when the stroke of the intermediate jack becomes full, as shown in FIG. 4, the pipe 3 on the rear side of the intermediate sleeve pipe 5 is propelled by the propulsive force A of the main pushing jack 2 to recover the stroke of the intermediate jack. FIG. 5 shows a detailed structure of the intermediate sleeve tube 5. As shown, the intermediate sleeve tube 5 is connected to the receiving tube 7.
And an insertion tube 8 movably inserted in the axial direction inside the reception tube 7. An intermediate jack 10 that extends and contracts in the axial direction of the pipe is provided between the distal end of the insertion pipe 8 and the rear end projection 9 of the receiving pipe 7. A plurality of the intermediate jacks 10 are provided in the circumferential direction of the pipe, and the expansion and contraction causes the receiving pipe 7 and the insertion pipe 8 to relatively move in the axial direction, thereby expanding and contracting the intermediate sleeve pipe 5. The aforementioned propulsive force B is generated. [0006] A tubular sediment inflow prevention plate 12 that covers the outer periphery of the distal end portion of the receiving tube 7 is attached to the inlet tube 8. When the insertion tube 8 and the receiving tube 7 move relatively in the axial direction and the intermediate sleeve tube 5 expands and contracts, the surrounding soil flows between the receiving hole and the receiving hole. This is to prevent the user from doing so. In order to reliably prevent the inflow of earth and sand, an annular seal member 13 is disposed between the inner periphery of the earth and sand inflow prevention plate 12 and the outer periphery of the receiving pipe 7. This sealing material 13
Backup rings 14 and 15 are provided on both sides of the. Then, screw out the bolt 17 from the press wheel 16 to seal
It is configured such that a predetermined sealing function is obtained by compressing 13. [0007] The receiving pipe 7 on the distal end side of the rear end projection 9
A tapered sealing material pressing surface 18 is formed on the inner circumference of the receiving tube 7. The receiving pipe 7 is located at a position deeper than the sealing material pressing surface 18.
A protrusion 19 is formed on the inner surface of the. When the propulsion work is completed, the receiving pipe 7 and the insertion pipe 8 are joined in the pipe. In this case, the intermediate jack 10 is extended again, and the distal end of the insertion tube 8 is
The receiving pipe 7 and the insertion pipe 8 are relatively moved in the axial direction so as to be positioned corresponding to the sealing material pressing surface 18. Then, the intermediate jack 10 is removed, and as shown in FIG. 6, an annular sealing material 20 is disposed between the sealing material pressing surface 18 and the outer peripheral surface of the insertion tube 8. Apply push ring 22. Then, the middle wheel 23 is engaged with the projection 19, and the sealing material is formed by the reaction force when the middle wheel 23 is pushed through the connecting rod 25 by the bolt 24 screwed out from the pressing wheel 22.
Applying a compressive force to 20, to obtain a predetermined sealing function. FIG. 6 also shows a joint 28 between the receiving pipe 7 and the insertion port 27 of the propulsion pipe 3 joined to the receiving pipe 7. The insertion port 29 at the end of the insertion tube 8 is
Utilizing the same joint structure as described above, it is joined to the socket of another propulsion pipe connected to this insertion pipe 8. However, in such a configuration, the intermediate jack 10 is extended after completion of the propulsion work as described above, so that the receiving pipe 7 and the insertion pipe 8 are axially aligned. However, even when the intermediate jack 10 is loosened and removed afterwards, the insertion tube 8 may enter the back side of the receiving tube 7 again. However, there is a problem that it may be difficult to secure the dimensions. Therefore, the present invention solves such a problem, and enables a sealing material to be appropriately installed even if the insertion tube enters the reception tube when the intermediate jack is removed. The purpose is to: In order to achieve this object, the present invention provides an annular sealing member disposed between the outer periphery of the distal end of the insertion tube and the inner periphery of the receiving tube, A pressing ring capable of compressing the material, a bolt screwed out of the pressing ring, and a middle ring provided inside the receiving pipe so as to be engaged with the bolt,
A protrusion formed on the inner periphery of the back of the receiving tube, and a turn disposed between the protrusion and the middle wheel to move and fix the middle wheel to an arbitrary position in the pipe axis direction. And a buckle. In such a configuration, when the propulsion work is completed, the intermediate jack is extended again so that the insertion pipe and the reception pipe are arranged so as to be suitable for the installation of the sealing material. After the tube is relatively moved in the axial direction, the intermediate jack is removed. At this time, if the insertion tube reenters the back side of the reception tube, the turnbuckle is operated accordingly to adjust the position of the middle ring along the tube axis direction. Then, by the threading of the bolts related to the middle wheel, the sealing material is appropriately compressed via the pressing wheel. An embodiment of the present invention will now be described with reference to FIG. 1. The same members as those shown in FIGS. 2 to 6 described above are denoted by the same reference numerals. , Will be described in detail. As shown in the drawing, a plurality of studs 31 extending in the axial direction of the tube extending toward the seal material pressing surface 18 are provided at the rear end protruding portion 9 of the receiving tube 7 at intervals in the circumferential direction. It is stuck and fixed. At the tip of each stud 31
One end of the turnbuckle 32 in the tube axis direction is screwed, and the other end of each of the plurality of turnbuckles 32 is screwed with another bolt 33 in the tube axis direction in the circumferential direction. The tip of each bolt 33 is fixed to the side surface of the middle wheel 23 by welding. 34 is the weld. In such a configuration, the intermediate jack is removed after completion of the propulsion work.
When the middle wheel 23 has entered the back side of the receiving tube 7 again, the turn ring 32 is operated to move the middle wheel 23 in the tube axis direction, and the middle wheel 23 is moved to a position corresponding to the insertion amount of the insertion tube 8. Fix it. An annular sealing material is provided between the sealing material pressing surface 18 and the outer peripheral surface of the insertion tube 8 in the same manner as shown in FIG.
20 and the split ring 21 and the pressing ring 22
The compression force is applied to the sealing material by a reaction force when the middle ring 23 is pushed via the connecting rod 25 by the bolt 24 screwed out of the sealing member 25 to obtain a predetermined sealing function. At this time, since the middle wheel 23 can be arranged at a position corresponding to the insertion amount of the insertion tube 8, the other split wheel 21, the pressing wheel 22, the bolt 24, the connecting rod 25, and the like can also be appropriately arranged, and The insertion tube 8 can be securely joined. As described above, according to the present invention, the middle wheel can be moved and fixed in the axial direction of the tube by the turnbuckle, so that the back side of the receiving tube after the removal of the intermediate jack is removed. The middle ring can be placed at the optimal position according to the degree of entry of the insertion tube into the inlet tube, and always always appropriately between the receiving tube and the insertion tube regardless of the degree of entry of the insertion tube Can be sealed.
【図面の簡単な説明】
【図1】本発明の一実施例の推進工法用の中間スリーブ
管の断面図である。
【図2】中間スリーブ工法を適用した従来の推進工法を
説明する概略図である。
【図3】図2の次の段階を示す概略図である。
【図4】図3の次の段階を示す概略図である。
【図5】従来の推進工法用の中間スリーブ管の断面図で
ある。
【図6】図5の中間スリーブ管の推進終了後の接合完了
状態を示す断面図である。
【符号の説明】
7 受口管
8 挿口管
9 奥端突部
20 シール材
22 押輪
23 中輪
24 ボルト
32 ターンバックルBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an intermediate sleeve tube for a propulsion method according to an embodiment of the present invention. FIG. 2 is a schematic diagram illustrating a conventional propulsion method using an intermediate sleeve method. FIG. 3 is a schematic diagram showing the next stage of FIG. 2; FIG. 4 is a schematic diagram showing the next stage of FIG. 3; FIG. 5 is a sectional view of a conventional intermediate sleeve tube for a propulsion method. FIG. 6 is a cross-sectional view showing a joint completed state after completion of propulsion of the intermediate sleeve tube of FIG. 5; [Description of Signs] 7 Receiving pipe 8 Inserting pipe 9 Back end projection 20 Seal material 22 Pressing ring 23 Middle wheel 24 Bolt 32 Turnbuckle
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特公 昭58−41399(JP,B2) 特公 昭58−41400(JP,B2) 実公 昭51−19770(JP,Y1) (58)調査した分野(Int.Cl.7,DB名) E21D 9/06 311 F16L 1/024 F16L 21/02 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-B-58-41399 (JP, B2) JP-B-58-41400 (JP, B2) Jikken-Sho 51-19770 (JP, Y1) (58) Field (Int.Cl. 7 , DB name) E21D 9/06 311 F16L 1/024 F16L 21/02
Claims (1)
自在に挿入されるとともに、管内における挿口管の先端
と受口管の奥端との間に中間ジャッキが設けられる推進
工法用の中間スリーブ管であって、前記挿口管の先端外
周と受口管の内周との間に配置される環状のシール材
と、このシール材を圧縮可能な押輪と、この押輪からね
じ出されるボルトと、前記ボルトに係り合うように受口
管の内部に設けられた中輪と、受口管の奥部の内周に形
成された突部と、この突部と前記中輪との間に配置され
て、前記中輪を管軸方向の任意の位置に移動させて固定
させるターンバックルとを有することを特徴とする推進
工法用の中間スリーブ管。(57) [Claims 1] An insertion tube is inserted movably in the axial direction inside the reception tube, and the distal end of the insertion tube and the back end of the reception tube in the tube. An intermediate sleeve pipe for a propulsion method in which an intermediate jack is provided between the sealing pipe and an annular sealing material disposed between the outer periphery of the distal end of the insertion tube and the inner periphery of the receiving tube. , A bolt that is screwed out of the push ring, a middle ring that is provided inside the receiving pipe so as to be engaged with the bolt, and a protrusion that is formed on the inner circumference at the back of the receiving pipe. And a turnbuckle disposed between the protrusion and the middle wheel to move and fix the middle wheel to an arbitrary position in the pipe axis direction, the intermediate for propulsion method being characterized in that: Sleeve tube.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20119394A JP3406075B2 (en) | 1994-08-26 | 1994-08-26 | Intermediate sleeve tube for propulsion method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20119394A JP3406075B2 (en) | 1994-08-26 | 1994-08-26 | Intermediate sleeve tube for propulsion method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0860981A JPH0860981A (en) | 1996-03-05 |
JP3406075B2 true JP3406075B2 (en) | 2003-05-12 |
Family
ID=16436894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20119394A Expired - Lifetime JP3406075B2 (en) | 1994-08-26 | 1994-08-26 | Intermediate sleeve tube for propulsion method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3406075B2 (en) |
-
1994
- 1994-08-26 JP JP20119394A patent/JP3406075B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0860981A (en) | 1996-03-05 |
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