JP2935467B2 - Tunnel backfill method and shield backfill device - Google Patents
Tunnel backfill method and shield backfill deviceInfo
- Publication number
- JP2935467B2 JP2935467B2 JP2200678A JP20067890A JP2935467B2 JP 2935467 B2 JP2935467 B2 JP 2935467B2 JP 2200678 A JP2200678 A JP 2200678A JP 20067890 A JP20067890 A JP 20067890A JP 2935467 B2 JP2935467 B2 JP 2935467B2
- Authority
- JP
- Japan
- Prior art keywords
- tunnel
- outer shell
- reaction force
- inner cylinder
- blocking means
- 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)
- Lining And Supports For Tunnels (AREA)
Description
【発明の詳細な説明】 （ａ）．産業上の利用分野 本発明は、不要になったトンネルを埋め戻すトンネル
埋め戻し方法及びシールド埋め戻し装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a). TECHNICAL FIELD The present invention relates to a tunnel backfill method and a shield backfill apparatus for backfilling an unnecessary tunnel.
（ｂ）．従来の技術 従来、地下の開発はそれほど進んでいなかったため、
新たなトンネルの掘削に際して別の既設のトンネルが障
害となることは殆どなかった。(B). Conventional technology Conventionally, underground development was not so advanced,
Another existing tunnel was rarely a hindrance when digging a new tunnel.
（ｃ）．発明が解決しようとする問題点 しかし、最近、地下の開発が進むにつれ、新たにトン
ネルを構築すべき領域に使用されなくなった古いトンネ
ルが存在する場合が生じる。このような不要なトンネル
が存在する領域において新たなトンネルをシールド掘削
機等によって掘削する場合に、当該新たなトンネルを前
記不要なトンネルと交差等させるときには、新たなトン
ネルの掘削に先立って、古い不要なトンネルを埋め戻し
ておく必要がある。(C). Problems to be Solved by the Invention However, recently, as the underground development progresses, there are cases where old tunnels that are no longer used exist in areas where new tunnels are to be constructed. When a new tunnel is excavated by a shield excavator or the like in a region where such an unnecessary tunnel exists, when the new tunnel intersects with the unnecessary tunnel or the like, prior to the excavation of the new tunnel, the old tunnel is used. Unnecessary tunnels need to be backfilled.
本発明は、上記の問題点を解消すべく、不要になった
トンネルを好適に埋め戻すことが出来るトンネル埋め戻
し方法及びシールド埋め戻し装置を提供することを目的
とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a tunnel backfill method and a shield backfill device capable of suitably backfilling an unnecessary tunnel in order to solve the above problems.
（ｄ）．問題点を解決するための手段 即ち、本発明は、内筒（５）により埋め戻すべきトン
ネル（30）の外側を包囲し、外殻（２）により前記内筒
の外側を包囲し、前記内筒と前記外殻の間を、隔壁
（３）によって閉鎖し、前記隔壁の前方に円環状のカッ
タ（7a）を回転駆動自在に設け、前記隔壁の後方の前記
外殻の内側において、遮断手段（９）により前記トンネ
ル（30）の未埋め戻し部分（35）と埋め戻し部分（37）
とを遮断し、前記遮断手段（９）を前記外殻（２）に対
して前進後退自在に設け、前記外殻（２）に推進ジャッ
キ（６）を前記遮断手段（９）に対して押圧自在に設
け、反力受け手段（16）を前記埋め戻すべきトンネル
（30）の覆工（32）の内周部（32a）に対して当接係合
自在に設け、前記反力受け手段と前記遮断手段（９）間
に連結推進手段（12）を、前記反力受け手段との間で前
記遮断手段の移動方向に相対的に移動駆動自在に設け、
前記内筒の内側に、環状に形成されたシール部材（24）
を設けておき、該シール部材（24）を、押圧部材（25）
により前記トンネル（30）の外周に押圧しつつ、前記反
力受け手段（16）を前記トンネルの覆工内周部に対して
当接係合させた状態で、前記推進ジャッキ（６）を前記
遮断手段に対して押圧して前記トンネル覆工内周部から
掘削反力を得る形で前記隔壁（３）の前方の前記トンネ
ルの外側の地山（40）を前記カッタ（7a）により環状に
掘削して、前記外殻、前記隔壁、及び前記内筒を前進さ
せ、更に、前記連結推進手段（12）を駆動して前記反力
受け手段（16）から反力を受ける形で前記遮断手段
（９）を未埋め戻し部分に前進させると共に、当該遮断
手段の後方の埋め戻し部分（37）に埋め戻し材（36）を
充填してゆくようにして構成される。(D). Means for Solving the Problems That is, the present invention provides an inner tube (5) surrounding the outside of a tunnel (30) to be backfilled, an outer shell (2) surrounding the outside of the inner tube, The space between the cylinder and the outer shell is closed by a partition wall (3), and an annular cutter (7a) is rotatably driven in front of the partition wall, and blocking means is provided inside the outer shell behind the partition wall. According to (9), the unfilled portion (35) and the backfilled portion (37) of the tunnel (30)
And the blocking means (9) is provided so as to be able to move forward and backward with respect to the outer shell (2), and the propulsion jack (6) is pressed against the blocking means (9) by the outer shell (2). The reaction force receiving means (16) is provided freely so as to be able to abut and engage with the inner peripheral portion (32a) of the lining (32) of the tunnel (30) to be backfilled. A connection propulsion means (12) provided between the blocking means (9) so as to be movable relative to the reaction force receiving means in a moving direction of the blocking means;
An annular sealing member (24) inside the inner cylinder.
Is provided, and the sealing member (24) is replaced with a pressing member (25).
The propulsion jack (6) is pressed against the outer periphery of the tunnel (30), and the propulsion jack (6) is brought into contact with the reaction force receiving means (16) in contact with the inner lining of the tunnel. The ground (40) outside the tunnel in front of the bulkhead (3) is annularly formed by the cutter (7a) in such a manner as to press against the blocking means to obtain the excavation reaction force from the inner periphery of the tunnel lining. Excavating to advance the outer shell, the partition wall, and the inner cylinder, and further driving the connection propulsion means (12) to receive the reaction force from the reaction force receiving means (16); (9) is advanced to the unfilled portion, and the backfill portion (37) behind the blocking means is filled with the backfill material (36).
また、本発明は、外殻（２）を有し、該外殻（２）の
内側に、埋め戻すべきトンネル（30）の外径よりも大き
な内径の内筒（５）を設け、該内筒の内側に、環状に形
成されたシール部材（24）を設け、更に、前記内筒の内
側に、前記シール部材を内側に押圧する押圧部材（25）
を設け、前記外殻と前記内筒との間に、隔壁（３）を環
状に設け、前記隔壁の前方に、地山を環状に掘削し得る
カッタ（7a）を回転駆動自在に設け、前記隔壁の後方の
前記外殻の内側に、当該外殻の内部の空間を前後に遮断
する遮断手段（９）を前記外殻に対して前進後退自在に
設け、前記外殻に推進ジャッキ（６）を前記遮断手段に
対して押圧自在に設け、反力受け手段（16）を前記埋め
戻すべきトンネルの覆工（32）の内周部（32a）に対し
て当接係合自在に設け、前記反力受け手段と遮断手段間
に連結推進手段（12）を、前記反力受け手段との間で前
記遮断手段の移動方向に相対的に移動駆動自在に設け、
埋め戻し材注入手段（10）を、埋め戻し材（36）を前記
遮断手段（９）の後方に注入し得る形で設けて構成され
る。Further, the present invention has an outer shell (2), and an inner cylinder (5) having an inner diameter larger than the outer diameter of the tunnel (30) to be backfilled is provided inside the outer shell (2). An annular sealing member (24) is provided inside the cylinder, and a pressing member (25) for pressing the sealing member inward inside the inner cylinder.
A partition (3) is annularly provided between the outer shell and the inner cylinder, and a cutter (7a) capable of annularly excavating the ground is provided rotatably in front of the partition, Inside the outer shell behind the partition, a blocking means (9) for blocking the space inside the outer shell back and forth is provided so as to be able to move forward and backward with respect to the outer shell, and a propulsion jack (6) is provided on the outer shell. Is provided so as to be capable of being pressed against the blocking means, and the reaction force receiving means (16) is provided so as to be capable of abuttingly engaging with the inner peripheral portion (32a) of the lining (32) of the tunnel to be backfilled. A connection propulsion means (12) is provided between the reaction force receiving means and the blocking means so as to be relatively movable between the reaction force receiving means and the movement direction of the blocking means.
The backfill material injecting means (10) is provided so as to be capable of injecting the backfill material (36) behind the blocking means (9).
なお、括弧内の番号等は、図面における対応する要素
を示す便宜的なものであり、従って、本記述は図面上の
記載に限定拘束されるものではない。以下の「（ｅ）．
作用」の欄についても同様である。Note that the numbers and the like in parentheses are for convenience showing the corresponding elements in the drawings, and therefore, this description is not limited to the description on the drawings. The following “(e).
The same applies to the column of “action”.
（ｅ）．作用 上記した構成により、内筒（５）により埋め戻すべき
トンネル（30）の外側を包囲し、遮断手段（９）により
トンネル（30）の未埋め戻し部分（35）と埋め戻し部分
（37）とを遮断し、シール部材（24）を、押圧部材（2
5）によりトンネル（30）の外周に押圧しつつ、反力受
け手段（16）をトンネルの覆工内周部に対して当接係合
させた状態で、推進ジャッキ（６）を遮断手段に対して
押圧してトンネル覆工内周部から掘削反力を得る形で隔
壁（３）の前方のトンネルの外側の地山（40）をカッタ
（7a）により環状に掘削して、外殻、隔壁、及び内筒を
前進させ、更に、連結推進手段（12）を駆動して反力受
け手段（16）から反力を受ける形で遮断手段（９）を未
埋め戻し部分に前進させると共に、当該遮断手段の後方
の埋め戻し部分（37）に埋め戻し材（36）を充填してゆ
くように作用する。(E). According to the above-described configuration, the outside of the tunnel (30) to be backfilled is surrounded by the inner cylinder (5), and the unfilled portion (35) and the backfill portion (37) of the tunnel (30) are closed by the blocking means (9). And the sealing member (24) is
With the reaction force receiving means (16) abuttingly engaged with the inner lining of the tunnel while pressing against the outer periphery of the tunnel (30) by 5), the propulsion jack (6) is used as the blocking means. The ground (40) outside the tunnel in front of the bulkhead (3) is excavated in an annular shape by the cutter (7a) in a manner to obtain a drilling reaction force from the inner periphery of the tunnel lining by pressing against the outer shell, The partition wall and the inner cylinder are advanced, and further, the connection propelling means (12) is driven to advance the blocking means (9) to the unbackfilled portion in a form receiving the reaction force from the reaction force receiving means (16), The backfill portion (37) behind the blocking means acts to fill the backfill material (36).
（ｆ）．実施例 以下、図面に基づき、本発明の実施例を説明する。(F). Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図乃至第４図は、本発明によるトンネル埋め戻し
方法の一実施例を示す工程図、 第５図は、第１図に示すシールド埋め戻し装置のＶ矢
視図、 第６図は、第１図に示すシールド埋め戻し装置の隔壁
近傍の拡大図、 第７図は、第６図に示すシールド埋め戻し装置の内筒
近傍の拡大図である。1 to 4 are process diagrams showing an embodiment of a tunnel backfill method according to the present invention, FIG. 5 is a view of the shield backfill device shown in FIG. FIG. 7 is an enlarged view near the inner wall of the shield backfilling device shown in FIG. 6, and FIG. 7 is an enlarged view near the inner cylinder of the shield backfilling device shown in FIG.
本発明によるシールド埋め戻し装置１は、第１図に示
すように、円筒状に形成された外殻２を有しており、外
殻２の図中左方の前端部2aには、カッタ7a、駆動装置7b
等から成る掘削機７が設けられている。即ち、外殻２の
内側には、円環状に形成された隔壁３が設けられてお
り、該隔壁３の内側には、埋め戻すべきべきトンネル30
の外径よりも僅かに大きな内径の内筒５が設けられてい
る。そして、隔壁３の図中左方には、外径が外殻２の外
径と略同一の大きさで、内径が埋め戻すべきべきトンネ
ル30の外径と略同一の大きさの円環状に形成されたカッ
タ7aが、外殻２の前方、即ち図中左方に向けて設けられ
ている。そして、該カッタ7aには、油圧モータ等から成
る駆動装置7bが当該カッタ7aを第５図矢印Ｅ、Ｆ方向に
回転駆動する形で接続されている。また、内筒５の内周
面ａには、第６図又は第７図に示すように、内筒シール
装置23が設けられており、内筒シール装置23は、図中左
右方向に３重に配置されたワイヤブラシ24及びベローズ
25を有している。即ち、内筒５の内周面5aには、ワイヤ
ブラシ24が、先端を後方（図中右方）及び内側（図中下
方）に向けて末広がりとなる形で円環状に植設されてお
り、更に、バネ鋼等の弾性材料で形成されたプレート24
aが、ワイヤブラシ24を後方（図中右方）から被覆する
形で先端を後方（図中右方）及び内側（図中下方）に向
けた形で円環状に配置されている。また、ワイヤブラシ
24は、金属製の保護プレート24bによって前方（図中左
方）から被覆されている。更に、内筒５の内周面5aに
は、ゴム製のベローズ25が、プレート24aの外側（図中
上方）に設けられており、該ベローズ25の内部空間は内
筒５に穿設形成された加圧水供給路5bと連通している。
更に、内筒５には、グリース供給路5cが、吐出口5c′を
ワイヤブラシ24、24間の内周面5a上に位置させる形で、
穿設形成されている。そして、隔壁３の後方、即ち第１
図右方には、油圧ジャッキ６が、複数個、外殻２に沿っ
た形で円環状に配列設置されており、油圧ジャッキ６に
はラム6aが、矢印CS、DS方向に突出後退自在に設けられ
ている。As shown in FIG. 1, a shield backfilling device 1 according to the present invention has a cylindrical outer shell 2, and a cutter 7a is provided on the left front end 2a of the outer shell 2 in the drawing. , Drive 7b
An excavator 7 is provided. That is, a partition 3 formed in an annular shape is provided inside the outer shell 2, and a tunnel 30 to be backfilled is provided inside the partition 3.
The inner cylinder 5 having an inner diameter slightly larger than the outer diameter of the inner cylinder 5 is provided. On the left side of the partition wall 3 in the figure, an outer diameter is substantially the same as the outer diameter of the outer shell 2 and an inner diameter is formed in an annular shape having substantially the same size as the outer diameter of the tunnel 30 to be backfilled. The formed cutter 7a is provided in front of the outer shell 2, that is, toward the left in the figure. The cutter 7a is connected to a driving device 7b composed of a hydraulic motor or the like so as to rotate the cutter 7a in directions indicated by arrows E and F in FIG. As shown in FIG. 6 or 7, an inner cylinder sealing device 23 is provided on the inner peripheral surface a of the inner cylinder 5, and the inner cylinder sealing device 23 Brush 24 and bellows arranged in
Has 25. That is, on the inner peripheral surface 5a of the inner cylinder 5, the wire brush 24 is implanted in an annular shape such that the distal end is widened toward the rear (right side in the figure) and inward (downward in the figure). And a plate 24 formed of an elastic material such as spring steel.
“a” is arranged in an annular shape with its tip facing rearward (rightward in the figure) and inward (downward in the figure) so as to cover the wire brush 24 from behind (rightward in the figure). Also a wire brush
24 is covered from the front (left side in the figure) by a metal protection plate 24b. Further, a rubber bellows 25 is provided on the inner peripheral surface 5a of the inner cylinder 5 outside (upward in the figure) of the plate 24a, and the internal space of the bellows 25 is formed by drilling in the inner cylinder 5. The pressurized water supply passage 5b communicates with the pressurized water supply passage 5b.
Further, in the inner cylinder 5, a grease supply passage 5c is provided so that the discharge port 5c 'is located on the inner peripheral surface 5a between the wire brushes 24, 24.
It is formed by drilling. Then, behind the partition 3, that is, the first
FIG right, hydraulic jacks 6, a plurality are arranged disposed annularly in line with the outer shell 2, the ram 6a to the hydraulic jack 6 is protruded backward arrows C S, the D S direction It is provided freely.
また、外殻２の内側には、油圧ジャッキ６の後方、即
ち第１図右方に、面板９が、外殻２内部の空間を図中左
右方向に遮断する形で、外殻２に対して矢印Ｃ、Ｄ方向
に移動自在に設けられている。そして、面板９には、埋
め戻し材注入管10が、吐出口10aを面板９の後方、即ち
図中右方に連通させる形で、装着されており、該埋め戻
し材注入管10には、所定の埋め戻し材36を圧送する図示
しないポンプ等が接続されている。Further, inside the outer shell 2, a face plate 9 behind the hydraulic jack 6, that is, to the right in FIG. 1, blocks the space inside the outer shell 2 in the left-right direction in the drawing, and Movably in the directions of arrows C and D. A backfill material injection pipe 10 is mounted on the face plate 9 so that the discharge port 10a communicates with the back of the face plate 9, that is, to the right in the drawing. A pump or the like (not shown) for pumping a predetermined backfill material 36 is connected.
更に、面板９の図中左方には、グリッパ架台11が設け
られている。即ち、グリッパ架台11は、面板接続器12、
セグメント接続器13等を有しており、面板接続器12は、
埋め戻すべきトンネル30の内部を矢印Ｃ、Ｄ方向へ移動
自在な形で円筒状に形成されており、面板接続器12に
は、後端部12aが、ピン9bを介して、面板９に固着され
た接続部9aと係脱自在な形で設けられている。そして、
面板接続器12の外側には、セグメント接続器13が、ラム
15aを面板接続器12の前端部12bに固定された油圧ジャッ
キ15を介して、面板接続器12に対して矢印CP、DP方向に
移動駆動自在に設けられている。そして、セグメント接
続器13には、埋め戻すべきトンネル30の内径に対応する
形で円弧状に形成された当接板16が、複数個、油圧ジャ
ッキ17を介して、軸心CTに対して放射方向である第５図
矢印Ｇ、Ｈ方向に突出後退自在に設けられている。Further, a gripper base 11 is provided on the left side of the face plate 9 in the drawing. That is, the gripper base 11 is a face plate connector 12,
It has a segment connector 13 and the like, and the face plate connector 12
The inside of the tunnel 30 to be backfilled is formed in a cylindrical shape so as to be movable in the directions of arrows C and D, and the rear end portion 12a of the face plate connector 12 is fixed to the face plate 9 via a pin 9b. It is provided so as to be detachable from the connected connecting portion 9a. And
On the outside of the face plate connector 12, a segment connector 13 is provided.
15a and through the hydraulic jack 15 which is fixed to the front end portion 12b of the face plate connector 12, arrow C P, it is provided movably driven in the D P direction with respect to the face plate connector 12. The segment connector 13 has a plurality of contact plates 16 formed in an arc shape corresponding to the inner diameter of the tunnel 30 to be backfilled and radiated to the axis CT through the hydraulic jack 17. It is provided so as to protrude and retreat in the directions shown by arrows G and H in FIG.
また、面板接続器12の外側には、セグメント接続器13
の第２図右方に、複数のコアカッタ19が、面板接続器12
に対して軸心CT方向（矢印Ｃ、Ｄ方向）及び軸心CTを中
心にした円周方向に移動可能な形で、油圧シリンダ等を
介して矢印Ｇ、Ｈ方向に突出後退自在に設けられている
（尚、図中には１つのコアカッタ19のみが示されてい
る。）更に、面板接続器12の外側には、コアカッタ19の
第２図右方に、図中左方に向けて開口したコ字型に形成
されたセグメント把持破砕装置20が、コアカッタ19と同
様に、面板接続器12に対して軸心CT方向（矢印Ｃ、Ｄ方
向）及び軸心CTを中心にした円周方向に移動可能な形
で、油圧シリンダ等を介して矢印Ａ、Ｂ方向に揺動駆動
自在に設けられている。A segment connector 13 is provided outside the face plate connector 12.
On the right side of FIG. 2, a plurality of core cutters 19 are connected to the face plate connector 12.
It is provided so that it can move in the direction of arrows G and H via a hydraulic cylinder or the like so that it can move in the direction of the axis CT (directions of arrows C and D) and in the circumferential direction around the axis CT. (Note that only one core cutter 19 is shown in the figure.) Further, outside the face plate connector 12, the core cutter 19 is opened rightward in FIG. 2 and leftward in the figure. As in the case of the core cutter 19, the segment gripping and crushing device 20 formed in the shape of a U-shape is provided with respect to the face plate connector 12 in the axial CT direction (the directions of arrows C and D) and in the circumferential direction around the axial CT. Movably in a direction indicated by arrows A and B via a hydraulic cylinder or the like.
また、埋め戻すべきトンネル30には、第１図及び第５
図に示すように、複数のセグメントピース31aが軸心CT
方向及び軸心CTを中心にした円周方向に継手ボルトによ
り円筒状に組み立てられた形で、１リングの長さがＬの
セグメント31が、地山40の土圧・水圧に対抗する形で構
築されている。更に、トンネル30には、第１図及び第５
図に示すように、円筒状に組み立てられたセグメント31
の内側に、二次覆工32が形成されている。In addition, the tunnel 30 to be backfilled
As shown in the figure, a plurality of segment pieces 31a are
In a form assembled cylindrically with joint bolts in the circumferential direction around the direction and the axis CT, a segment 31 having a length L of one ring is opposed to the earth pressure and water pressure of the ground 40. Has been built. 1 and 5
As shown in the figure, a cylindrically assembled segment 31
Inside, a secondary lining 32 is formed.
シールド埋め戻し装置１、埋め戻すべきトンネル30
は、以上のような構成を有するので、該シールド埋め戻
し装置１により既設のトンネル30を埋め戻すに際して
は、まず、立坑等からトンネル30のセグメント31の外側
の地山40を、手堀り又は機械堀りによって、シールド埋
め戻し装置１の外殻２の外径に対応し得るように掘削す
る。そして、シールド埋め戻し装置１を、第１図に示す
ように、掘削されたセグメント31の外側に外殻２の前端
部2a、掘削機７のカッタ7a、及び内筒５を挿入する形
で、トンネル30の図中右端、即ち矢印Ｄ方向の端に設置
する。Shield backfill device 1, tunnel 30 to be backfilled
Has the above configuration, when backfilling the existing tunnel 30 with the shield backfilling device 1, first, the ground 40 outside the segment 31 of the tunnel 30 is manually dug out from a shaft or the like. Excavation is performed by mechanical excavation so as to correspond to the outer diameter of the outer shell 2 of the shield backfill apparatus 1. Then, as shown in FIG. 1, the shield backfilling device 1 is inserted into the excavated segment 31 with the front end 2a of the outer shell 2, the cutter 7a of the excavator 7, and the inner cylinder 5 inserted therein. The tunnel 30 is installed at the right end in the drawing, that is, at the end in the direction of arrow D.
即ち、シールド埋め戻し装置１は、外殻２が、掘削機
７のカッタ7aをセグメント31の外側に配置する形で、埋
め戻すべきトンネル30のセグメント31の外側を包囲する
形で設置される。この際、面板９によってトンネル30が
図中左右方向に遮断される形となる。また、グリッパ架
台11を面板９の前方、即ち図中左方のトンネル30内部に
設置する。That is, the shield backfill apparatus 1 is installed in such a manner that the outer shell 2 surrounds the outside of the segment 31 of the tunnel 30 to be backfilled, with the cutter 7a of the excavator 7 disposed outside the segment 31. At this time, the tunnel 30 is blocked by the face plate 9 in the horizontal direction in the figure. Further, the gripper base 11 is installed in front of the face plate 9, that is, inside the tunnel 30 on the left side in the figure.
シールド埋め戻し装置１がトンネル30に設置される
と、以下のようにして、カッタ7aによりセグメント31の
外側の地山40に掘削すると共に外殻２を前進させ、シー
ルド埋め戻し装置１の外殻２及び面板９によって地山40
及び埋め戻し部分37の圧力に対抗した形で、外殻２内部
において、継手ボルトにより円筒状に組立られたセグメ
ント31及びその内側の二次覆工32を解体撤去し、更に、
面板９をセグメント31及び二次覆工32が撤去されたトン
ネル31の未埋め戻し部分35に前進させつつ、面板９の後
方の埋め戻し部分37に埋め戻し材36を圧入して、トンネ
ル30を埋め戻してゆく。When the shield backfill device 1 is installed in the tunnel 30, the cutter 7a excavates the ground 40 outside the segment 31 and advances the outer shell 2 as follows, and the outer shell 2 of the shield backfill device 1 Ground 40 by 2 and face plate 9
In the outer shell 2, the segment 31 cylindrically assembled by the joint bolt and the secondary lining 32 inside the shell 31 are dismantled and removed in a manner opposed to the pressure of the backfill portion 37,
While the face plate 9 is advanced to the unfilled portion 35 of the tunnel 31 from which the segments 31 and the secondary lining 32 have been removed, a backfilling material 36 is pressed into the backfill portion 37 behind the face plate 9, and the tunnel 30 is inserted. Backfill.
まず、第７図に示す内筒シール装置23の各ベローズ25
の内部に加圧水供給路5bから加圧水26を供給する。する
と、該ベローズ25は図中下方に膨張して、プレート24a
を介してワイヤブラシ24をセグメント31側に押圧し、各
ワイヤブラシ24がセグメント31の外周面31eに密着す
る。更に、グリース供給路5cからグリース27を供給し
て、ワイヤブラシ24、24間をグリース27で充填して、内
筒５とセグメント31との間隙29をシールする。また、第
１図に示すように、グリッパ架台11をトンネル30内部を
矢印Ｄ方向へ移動させ、面板接続器12の後端部12aをピ
ン9bを介して面板９の接続部9aと連結する。そして、油
圧ジャッキ17のラム17aを矢印Ｇ方向に突出させ、当接
板16を二次覆工32の内周面32aに圧着することにより、
セグメント接続器13をセグメント31及び二次覆工32に対
して固定する。すると、セグメント接続器13及び油圧ジ
ャッキ15を介して面板接続器12がセグメント31及び二次
覆工32に対して固定され、面板接続器12を介して面板９
がセグメント31及び二次覆工32に対して固定される。次
に、隔壁３の第６図左方に送泥管８から加圧泥水を供給
して切羽40aを加圧しつつ、掘削機７のカッタ7aを第５
図矢印Ｅ（又はＦ）方向に回転駆動すると共に、各油圧
ジャッキ６のラム6aを、第１図に示す油圧ジャッキ6Bの
ように、矢印DS方向に突出させて面板９を押圧し、セグ
メント31及び二次覆工32に対して固定された面板９から
反力を得る形で、隔壁３を介してカッタ7aを切刃40a方
向、即ち矢印Ｃ方向に押圧する。すると、その押圧力に
より、カッタ7aと切羽40aは所定の接触圧力で接し、切
羽40aはカッタａにより掘削され、外殻２の形状に対応
した形で、穴40bがセグメント31の外側に円環状に形成
される。それと同時に、外殻２は穴40bに挿入される形
で矢印Ｃ方向に前進する。この際、カッタ7aの後方の内
筒５はセグメント31に対して第６図矢印Ｃ方向へ移動す
るが、内筒５とセグメント31との間隙29は内筒シール装
置23によって確実に止水され、内筒５の図中左方の切羽
40a側から内筒５の図中右方のトンネル30内部への地下
水や泥水の漏洩が防止される。即ち、トンネル30が構築
された際にセグメント31と地山40との間には裏込め材40
cが充填されており、セグメント31の外周面31eに付着し
た裏込め材40cはカーラーで掘削しても完全に除去する
ことは困難であり、また、セグメント31自体が変形する
こともあるので、カッタ7aにより掘削されたセグメント
31の外側には局部的な凹凸が生じ、内筒５とセグメント
31との間隙29を一定の幅に保つことは困難である。しか
し、上述の内筒シール装置23では、各ワイヤブラシ24を
セグメント31側に押圧することによってセグメント31の
外側の局部的な凹凸に追従させることが出来るので、好
適に止水することが出来、万が一、ワイヤブラシ24から
地下水や泥水が漏洩しても、ワイヤブラシ24、24間に充
填されたグリース27によって、それ以上の漏洩が防止さ
れる。尚、上述の場合には、ワイヤブラシ24を、ベロー
ズ25を介して、水圧でセグメント31側に押圧する場合に
ついて述べたが、油圧や空圧でワイヤブラシ24をセグメ
ント31側に押圧するようにしてもよい。First, each bellows 25 of the inner cylinder sealing device 23 shown in FIG.
The pressurized water 26 is supplied from the pressurized water supply path 5b to the inside of the. Then, the bellows 25 expands downward in FIG.
The wire brushes 24 are pressed toward the segments 31 via the, so that each wire brush 24 comes into close contact with the outer peripheral surface 31e of the segment 31. Further, grease 27 is supplied from the grease supply path 5c, and the space between the wire brushes 24, 24 is filled with the grease 27, and the gap 29 between the inner cylinder 5 and the segment 31 is sealed. As shown in FIG. 1, the gripper base 11 is moved inside the tunnel 30 in the direction of arrow D, and the rear end 12a of the face plate connector 12 is connected to the connecting portion 9a of the face plate 9 via the pin 9b. Then, the ram 17a of the hydraulic jack 17 is protruded in the direction of arrow G, and the contact plate 16 is pressed against the inner peripheral surface 32a of the secondary lining 32,
The segment connector 13 is fixed to the segment 31 and the secondary lining 32. Then, the face plate connector 12 is fixed to the segment 31 and the secondary lining 32 via the segment connector 13 and the hydraulic jack 15, and the face plate 9 is connected via the face plate connector 12.
Are fixed to the segment 31 and the secondary lining 32. Next, pressurized muddy water is supplied from the mud feed pipe 8 to the left of the partition wall 3 in FIG.
While rotated in an arrow E (or F) direction, the ram 6a of each hydraulic jack 6, as hydraulic jacks 6 B shown in FIG. 1, presses the face plate 9 is projected in the arrow D S direction, In order to obtain a reaction force from the face plate 9 fixed to the segment 31 and the secondary lining 32, the cutter 7a is pressed through the partition wall 3 in the direction of the cutting blade 40a, that is, in the direction of arrow C. Then, due to the pressing force, the cutter 7a and the face 40a come into contact with a predetermined contact pressure, the face 40a is excavated by the cutter a, and a hole 40b is formed in an annular shape outside the segment 31 in a shape corresponding to the shape of the outer shell 2. Formed. At the same time, the outer shell 2 advances in the direction of the arrow C so as to be inserted into the hole 40b. At this time, the inner cylinder 5 behind the cutter 7a moves in the direction of arrow C in FIG. 6 with respect to the segment 31, but the gap 29 between the inner cylinder 5 and the segment 31 is securely stopped by the inner cylinder sealing device 23. , Left face in the figure of the inner cylinder 5
Leakage of groundwater or muddy water from the 40a side into the inside of the tunnel 30 on the right side of the inner cylinder 5 in the drawing is prevented. That is, when the tunnel 30 is constructed, the backing material 40 is provided between the segment 31 and the ground 40.
c is filled, the backfill material 40c attached to the outer peripheral surface 31e of the segment 31 is difficult to completely remove even if it is excavated with a curler, and since the segment 31 itself may be deformed, Segment drilled by cutter 7a
Local irregularities occur on the outside of 31 and the inner cylinder 5 and the segment
It is difficult to keep the gap 29 with 31 at a constant width. However, in the above-described inner cylinder sealing device 23, by pressing each wire brush 24 toward the segment 31 side, it is possible to follow local irregularities outside the segment 31, so that water can be stopped properly, Even if groundwater or muddy water leaks from the wire brush 24, further leakage is prevented by the grease 27 filled between the wire brushes 24,24. In the above case, the case where the wire brush 24 is pressed to the segment 31 side by water pressure via the bellows 25 has been described, but the wire brush 24 is pressed to the segment 31 side by hydraulic pressure or pneumatic pressure. You may.
そして、トンネル30のセグメント31の１リング分の長
さＬだけ外殻２が前進すると、油圧ジャッキ６のラム6a
は、第２図に示すように、矢印DS方向に突出した状態と
なり、また、セグメント31及び二次覆工32に対して固定
された面板９が外殻２の後端部2bに位置する状態とな
り、更に、トンネル30の最後方、即ち図中最右方の各セ
グメントピース31aAが内筒５から面板９側へ突出した状
態となる。この状態で、油圧ジャッキ６による外殻２の
前進を停止すると共に、カッタ7aによる地山40の掘削を
停止する。When the outer shell 2 advances by the length L of one ring of the segment 31 of the tunnel 30, the ram 6a of the hydraulic jack 6
As shown in FIG. 2, arrow D S in a state protruding direction, face plate 9 fixed against the segment 31 and the secondary lining 32 is positioned at the rear end 2b of the shell 2 Then, the segment pieces 31a A at the rear end of the tunnel 30, that is, the rightmost segment piece in the drawing protrude from the inner cylinder 5 toward the face plate 9 side. In this state, the movement of the outer shell 2 by the hydraulic jack 6 is stopped, and the excavation of the ground 40 by the cutter 7a is stopped.
そして、最後方のセグメントピース31aAを、当該セグ
メントピース31aAの内側の二次覆工32と一体的に、軸心
CTに対して円周方向に解体撤去する。即ち、面板接続器
12上に設置されたコアカッタ19を、軸心CT方向、軸心CT
に対して円周方向に適宜移動させて、最後方の各セグメ
ントピース31aAの円周方向の継手部、又は、最後方のセ
グメントピース31aAとその前方のセグメントピース31aB
との継手部に位置決めする。セグメントピース31a、31a
の継手部にコアカッタ19が位置決めされたところで、当
該コアカッタ19を矢印Ｇ方向に突出して、二次覆工32を
貫通する形でセグメントピース31aのボルトボックスま
で穿孔して、コアカッタ19によりボルトボックス内の継
手ボルトを切断し、当該継手ボルトにより連結されてい
たセグメントピース31a、31aを切り離す。そして、セグ
メントピース31a、31a間の各継手ボルトがコアカッタ19
により切断されたところで、第２図に示すセグメント把
持破砕装置20を軸心CT方向、軸心CTに対して円周方向に
適宜移動させて、当該セグメント把持破砕装置20によっ
て、最後方のセグメントピース31aAと二次覆工32とを一
体的に把持して、セグメント把持破砕装置20を矢印Ａ又
はＢ方向に揺動させる。すると、セグメント把持破砕装
置20に把持されたセグメントピース31aA及び二次覆工32
は、隣接するセグメントピース31a及び二次覆工32に対
して折り曲げられ、セグメントピース31aの継手部近傍
において二次覆工32にクラックが発生して破断し、セグ
メントピース31aAとその内側部分の二次覆工32とが一体
的に解体撤去される。そして、撤去されたセグメントピ
ース31aA及び二次覆工32を、セグメント把持破砕装置20
により把持した状態で面板接続器12の外側を円周方向に
移動させ、面板接続器12の第２図下方の外殻２の底部に
載置する。Then, the last segment piece 31a A is integrated with the secondary lining 32 inside the segment piece 31a A ,
Dismantle and remove circumferentially with respect to CT. That is, face plate connector
12 Install the core cutter 19 installed on the
In the circumferential direction of the segment piece 31a A , or the segment piece 31a A and the segment piece 31a B in front of the segment piece 31a A.
To the joint part. Segment piece 31a, 31a
When the core cutter 19 is positioned at the joint of the core cutter 19, the core cutter 19 is protruded in the direction of arrow G, and the core cutter 19 is pierced through the secondary lining 32 to the bolt box of the segment piece 31a. Is cut off, and the segment pieces 31a, 31a connected by the joint bolt are cut off. Then, each joint bolt between the segment pieces 31a, 31a is
After the cutting, the segment gripping and crushing device 20 shown in FIG. 2 is appropriately moved in the axial CT direction and the circumferential direction with respect to the axial CT, and the segment gripping and crushing device 20 is moved by the segment gripping and crushing device 20 to the rearmost segment piece. 31a A and the secondary lining 32 are integrally gripped, and the segment gripping and crushing device 20 is swung in the arrow A or B direction. Then, the segment piece 31a A gripped by the segment gripping and crushing device 20 and the secondary lining 32
Is folded against the segment piece 31a and the secondary lining 32 adjacent the joint portion near the segment piece 31a in the secondary lining 32 crack is broken occurs, the segment piece 31a A and its inner portion The secondary lining 32 is dismantled and removed integrally. Then, the removed segment piece 31a A and secondary lining 32 are
The outer side of the face plate connector 12 is moved in the circumferential direction in a state of being gripped by, and is placed on the bottom of the outer shell 2 below the face plate connector 12 in FIG.
セグメントピース31aA及び二次覆工32が撤去される
と、第３図に示すように、シールド固定装置21を新たに
最後方となったセグメントピース31aB及びその内側の二
次覆工32に係合させる。次に、油圧ジャッキ17のラム17
aを矢印Ｈ方向に後退させて、当接板16と二次覆工32の
内周面32aとの当接状態を解除すると共に、ピン9bを介
して面板接続器12の後端部12aと面板９の接続部9aとの
連結状態を解除した後に、グリッパ架台11をトンネル30
内部を矢印Ｃ方向へ、面板９の反対側へ移動させる。す
ると、円筒状の面板接続器12の後端部12aが開放され、
面板接続器12の内部を通って、グリッパ架台11の図中右
方の面板９側とグリッパ架台11の図中左方の立坑（図示
せず）側との間を移動可能な状態となるので、前述のよ
うに解体撤去されて外殻２の底部に載置異されたセグメ
ントピース31A及び二次覆工32を、接続器12の内部を通
過するモノレール22等を介してグリッパ架台11の図中左
方へ移動させ、更に、台車等に積み込んで立坑からトン
ネル30の外部に搬出する。When the segment piece 31a A and the secondary lining 32 are removed, as shown in FIG. 3, the shield fixing device 21 is newly attached to the segment piece 31a B which is the last and the secondary lining 32 inside the segment piece 31a B. Engage. Next, the ram 17 of the hydraulic jack 17
a is retracted in the direction of arrow H to release the contact state between the contact plate 16 and the inner peripheral surface 32a of the secondary lining 32, and to the rear end 12a of the face plate connector 12 via the pin 9b. After releasing the connection state of the face plate 9 with the connection portion 9a, the gripper base 11 is moved to the tunnel 30.
The inside is moved in the direction of arrow C to the opposite side of the face plate 9. Then, the rear end 12a of the cylindrical face plate connector 12 is opened,
Since it passes through the inside of the face plate connector 12 and can move between the right face plate 9 side of the gripper stand 11 in the figure and the left shaft (not shown) side of the gripper stand 11 in the figure, the dismantling has been outer shell 2 of the bottom mounting置異segment pieces 31 a and the secondary lining 32 as described above, the gripper frame 11 through the monorail 22 such that passing through the inside of the connector 12 It is moved to the left in the figure, and is further loaded on a bogie or the like and carried out of the tunnel 30 from the shaft.
セグメントピース31A及び二次覆工32が搬出される
と、第４図に示すように、グリッパ架台11を、トンネル
30内部を矢印Ｄ方向へ移動させ、再び、面板接続器12と
面板９とを、後端部12a、ピン9b、後続部9aを介して連
結する。この際、グリッパ架台11の面板接続器12とセグ
メント接続器13の間の油圧ジャッキ15のラム15aを矢印D
P方向へ後退させ、セグメント接続器13が面板接続器12
の前側、即ち面板９の反対側に位置する状態にしてお
く。When the segment piece 31 A and the secondary lining 32 is unloaded, as shown in FIG. 4, the gripper mount 11, the tunnel
The inside of 30 is moved in the direction of arrow D, and face plate connector 12 and face plate 9 are again connected via rear end 12a, pin 9b, and subsequent portion 9a. At this time, the ram 15a of the hydraulic jack 15 between the face plate connector 12 and the segment connector 13 of the gripper base 11 is pointed at the arrow D.
Retract in the P direction, and connect the segment connector 13 to the face plate connector 12
, That is, on the opposite side of the face plate 9.
そして、第１図に示すように、油圧ジャッキ17のラム
17aを矢印Ｇ方向に突出させ、当接板16を二次覆工32の
内周面32aに圧着することにより、セグメント接続器13
をセグメント31及び二次覆工32に対して固定すると共
に、油圧ジャッキ15、面板接続器12を介して、面板９を
セグメント31及び二次覆工32に対して固定する。次に、
面板９を押圧していた各油圧ジャッキ６のラム6aを、第
１図に示す油圧ジャッキ6Aのように、矢印CS方向に後退
させて面板９から離反させる。そして、面板接続器12と
セグメント接続器13間の油圧ジャッキ15のラム15aを矢
印CP方向に突出させて、セグメント31及び二次覆工32に
固定されたセグメント接続器13に対して面板接続器12を
矢印Ｃ方向へ移動させ、該面板接続器12と連結された面
板９を、セグメントピース31Aが撤去されたトンネル30
の未だ埋め戻されていない未埋め戻し部分35へ前進させ
る。面板９の前進と略同時に、面板９の後方、即ち図中
右方のセグメント31及び二次覆工32が既に撤去されたト
ンネル30部分及び外殻２の前進による穴40b部分から成
る埋め戻し部分37に、埋め戻し材注入管10から埋め戻し
材36を圧入して行く。Then, as shown in FIG.
17a is projected in the direction of arrow G, and the contact plate 16 is crimped to the inner peripheral surface 32a of the secondary lining 32 to thereby form the segment connector 13
Is fixed to the segment 31 and the secondary lining 32, and the face plate 9 is fixed to the segment 31 and the secondary lining 32 via the hydraulic jack 15 and the face plate connector 12. next,
The ram 6a of each hydraulic jack 6 which has been pushing the face plate 9, as in the hydraulic jack 6 A shown in FIG. 1, is separated from the face plate 9 is retracted in the arrow C S direction. Then, a ram 15a of the hydraulic jack 15 between the face plate connector 12 and the segment connector 13 is protruded in the arrow C P direction, the face plate connected to the segment connector 13 fixed to the segment 31 and the secondary lining 32 the vessel 12 is moved in the direction of arrow C, the tunnel 30 to the face plate 9 connected with said surface plate connector 12, the segment piece 31 a is removed
To an unfilled portion 35 that has not yet been filled. Substantially simultaneously with the advancement of the face plate 9, the back portion of the rear surface of the face plate 9, that is, the right segment 31 and the secondary lining 32 in FIG. The backfill material 36 is pressed into the backfill material injection pipe 10 into 37.
こうして、面板９が未埋め戻し部分35へ前進し、面板
９の後方の埋め戻し部分37に埋め戻し材36が充填され
て、トンネル30のセグメント31の１リング分の長さＬだ
け埋め戻し作業が終了すると、面板９は、第１図に示す
油圧ジャッキ6Aのラム6aAのように、各油圧ジャッキ６
の後退したラム6aの近傍まで前進した状態となる。In this way, the face plate 9 advances to the non-backfilled portion 35, the backfill portion 37 behind the face plate 9 is filled with the backfill material 36, and the backfilling operation is performed by the length L of one segment 31 of the tunnel 30. When but completed, face plate 9, like the ram 6a a hydraulic jack 6 a shown in FIG. 1, the hydraulic jacks 6
In the vicinity of the retreated ram 6a.
そして、再び、各油圧ジャッキ６のラム6aを、第１図
に示す油圧ジャッキ6Bのラム6aBのように、矢印DS方向
に突出させて面板９を押圧すると共に、第３図に示すシ
ールド固定装置21による外殻２とセグメント31及び二次
覆工32との係合状態を解除する。そして、前述のように
して、内筒シール装置23によって内筒５とセグメント31
との間隙29を止水した状態で、当接板16、セグメント接
続器13、面板接続器12を介してセグメント31及び二次覆
工32に対して固定された面板９から反力を得る形で、カ
ッタ7aによりセグメント31の外側の地山40を掘削しつ
つ、外殻２を前進させて、更にセグメント31の１リング
分の長さＬだけの埋め戻し作業を行う。Then, again, the ram 6a of each hydraulic jack 6, like the ram 6a B of the hydraulic jacks 6 B shown in FIG. 1, while pressing the faceplate 9 is projected in the arrow D S direction shown in FIG. 3 The engagement state of the outer shell 2 with the segment 31 and the secondary lining 32 by the shield fixing device 21 is released. Then, as described above, the inner cylinder 5 and the segment 31 are
In a state in which the gap 29 is stopped, a reaction force is obtained from the face plate 9 fixed to the segment 31 and the secondary lining 32 via the contact plate 16, the segment connector 13, and the face plate connector 12. Then, while excavating the ground 40 outside the segment 31 by the cutter 7a, the outer shell 2 is advanced, and the backfilling operation of the length L of one ring of the segment 31 is further performed.
こうして、シールド埋め戻し装置１によるトンネル30
の埋め戻し作業は、地山40及び埋め戻し部分37の圧力に
対向した形で進行されるので、セグメント31、二次覆工
32の撤去作業等を安全に行ってゆくことが出来ると共
に、埋め戻し部分37に埋め戻し材36を好適に充填してゆ
くことが出来る。Thus, the tunnel 30 by the shield backfill device 1
Since the backfilling work is performed in a manner opposing the pressure of the ground 40 and the backfilling portion 37, the segment 31, the secondary lining
The removal work or the like of 32 can be performed safely, and the backfill portion 37 can be suitably filled with the backfill material 36.
（ｇ）．発明の効果 以上、説明したように本発明は、内筒５により埋め戻
すべきトンネル30の外側を包囲し、外殻２により前記内
筒の外側を包囲し、前記内筒と前記外殻の間を、隔壁３
によって閉鎖し、前記隔壁の前方に円環状のカッタ7aを
回転駆動自在に設け、前記隔壁の後方の前記外殻の内側
において、面板９などの遮断手段により前記トンネル30
の未埋め戻し部分35と埋め戻し部分37とを遮断し、前記
遮断手段を前記外殻に対して前進後退自在に設け、前記
外殻２に油圧ジャッキ６などの推進ジャッキを前記遮断
手段に対して押圧自在に設け、当接板16などの反力受け
手段を前記埋め戻すべきトンネル30の履工32の内周面32
aなどの内周部に対して当接係合自在に設け、前記反力
受け手段と前記遮断手段間に面板連結器12なとの連結推
進手段を、前記反力受け手段との間で前記遮断手段の移
動方向に相対的に移動駆動自在に設け、前記内筒の内側
に、環状に形成されたワイヤブラシ24などのシール部材
を設けておき、該シール部材を、ベローズ25などの押圧
部材により前記トンネル30の外周に押圧しつつ、前記反
力受け手段を前記トンネルの履工内周部に対して当接係
合させた状態で、前記推進ジャッキを前記遮断手段に対
して押圧して前記トンネル履工内周部から掘削反力を得
る形で前記隔壁３の前方の前記トンネルの外側の地山40
を前記カッタ7aにより環状に掘削して、前記外殻、前記
隔壁、及び前記内筒を前進させ、更に、前記連結推進手
段を駆動して前記反力受け手段から反力を受ける形で前
記遮断手段を未埋め戻し部分に前進させると共に、当該
遮断手段の後方の埋め戻し部分37に埋め戻し材36を充填
してゆくようにして構成したので、トンネル30の外側の
地山40を掘削することにより、外殻２、隔壁３、内筒
５、及び遮断手段を未埋め戻し部分35に前進させること
が出来、前進した遮断手段の後方の埋め戻し部分37に埋
め戻し材36を充填することにより、不要なトンネル30を
好適に埋め戻すことが出来る。この際、シール部材は押
圧部材によってトンネル30の外周に押圧されているの
で、掘削によってトンネル30の外周に凹凸が生じても、
トンネル30の外周と内筒５の間隙は、追従性の良いシー
ル部材により好適に止水され、地山40側からトンネル30
の未埋め戻し部分35に地下水、泥水等が漏洩することを
防止することが出来る。(G). Effect of the Invention As described above, the present invention surrounds the outside of the tunnel 30 to be backfilled with the inner cylinder 5, surrounds the outside of the inner cylinder with the outer shell 2, and forms a space between the inner cylinder and the outer shell. To the partition 3
An annular cutter 7a is provided rotatably in front of the partition wall, and inside the outer shell behind the partition wall, the tunnel 30 is closed by a blocking means such as a face plate 9.
Between the unfilled portion 35 and the backfilled portion 37, the blocking means is provided so as to be able to move forward and backward with respect to the outer shell, and a propulsion jack such as a hydraulic jack 6 is provided on the outer shell 2 with respect to the blocking means. Inner surface 32 of the footwear 32 of the tunnel 30 to be backfilled with the reaction force receiving means such as the contact plate 16.
a, a coupling propulsion means for connecting the face plate coupler 12 between the reaction force receiving means and the blocking means, and It is provided so as to be relatively movable in the moving direction of the blocking means, and a seal member such as a wire brush 24 formed in an annular shape is provided inside the inner cylinder, and the seal member is a pressing member such as a bellows 25. By pressing the propulsion jack against the shut-off means while pressing the reaction force receiving means against the inner circumference of the tunnel while pressing against the outer periphery of the tunnel 30 by The ground 40 outside the tunnel in front of the bulkhead 3 is formed in such a manner as to obtain the excavation reaction force from the inner periphery of the tunnel footing.
Is excavated in an annular shape by the cutter 7a, the outer shell, the partition wall, and the inner cylinder are advanced, and further, the connection propulsion unit is driven to receive the reaction force from the reaction force receiving unit, and the cutoff is performed. Since the means is advanced to the unfilled portion and the backfill portion 37 behind the blocking means is filled with the backfill material 36, the ground 40 outside the tunnel 30 is excavated. As a result, the outer shell 2, the partition 3, the inner cylinder 5, and the blocking means can be advanced to the non-backfilled portion 35, and the backfilling portion 37 behind the advanced blocking means can be filled with the backfill material 36. Unnecessary tunnels 30 can be suitably backfilled. At this time, since the sealing member is pressed against the outer periphery of the tunnel 30 by the pressing member, even if the outer periphery of the tunnel 30 is uneven due to excavation,
The gap between the outer periphery of the tunnel 30 and the inner cylinder 5 is preferably stopped by a sealing member having good followability, and the tunnel 30
It is possible to prevent groundwater, muddy water, etc. from leaking into the unfilled portion 35.
また、前記反力受け手段を前記トンネルの履工内周部
に対して当接係合させた状態で、前記推進ジャッキを前
進遮断手段に対して押圧して前記トンネル履工内周部か
ら掘削反力を得る形で前記隔壁の前方の前記トンネルの
外側の地山を前記カッタにより環状に掘削して、前記外
殻、前記隔壁、及び前記内筒を前進させ、更に、前記連
結推進手段を駆動して前記反力受け手段から反力を受け
る形で遮断手段を未埋め戻し部分に前進させることか
ら、遮断手段を前進させる際の反力、外殻２の推進反力
及びカッタ1aの掘削反応は反力受け手段を介して全て埋
め戻すべきトンネル覆工の内周部から取ることが出来
る。従って、推進反力及び掘削反力などを埋戻材側から
取る必要が無く、埋戻材の締め固め状態の如何に係らず
適正な反力をトンネル覆行内周部側から適切に取ること
が出来、信頼性の高い施工が可能となる。Further, in a state where the reaction force receiving means is brought into contact with and engaged with the inner peripheral portion of the tunnel, the propulsion jack is pressed against the forward blocking device to excavate from the inner peripheral portion of the tunnel. The ground outside the tunnel in front of the bulkhead is dug in a ring shape by the cutter in a manner to obtain a reaction force, and the outer shell, the bulkhead, and the inner cylinder are advanced, and further, the connection propulsion means is Since the blocking means is advanced to the non-backfilled portion by driving and receiving the reaction force from the reaction force receiving means, the reaction force when the blocking means is advanced, the propulsion reaction force of the outer shell 2, and the excavation of the cutter 1a. The reaction can be taken from the inner periphery of the tunnel lining to be backfilled via reaction force receiving means. Therefore, it is not necessary to take propulsion reaction force and excavation reaction force etc. from the backfill material side, and it is possible to appropriately take an appropriate reaction force from the tunnel lining inner peripheral side regardless of the compacted state of the backfill material. And highly reliable construction is possible.
また、本発明は、外殻２を有し、該外殻２の内側に、
埋め戻すべきトンネル30の外径よりも大きな内径の内筒
５を設け、該内筒の内側に、環状に形成されたワイヤブ
ラシ24などのシール部材を設け、更に、前記内筒の内側
に、前記シール部材を内側に押圧するベローズ25などの
押圧部材を設け、前記外殻と前記内筒との間に、隔壁３
を環状に設け、前記隔壁の前方に、地山を環状に掘削し
得るカッタ7aを回転駆動自在に設け、前記隔壁の後方の
前記外殻の内側に、当該外殻の内部の空間を前後に遮断
する面板９などの遮断手段を前記外殻に対して前進後退
自在に設け、前記外殻に推進ジャッキ６などの推進ジャ
ッキを前記遮断手段に対して押圧自在に設け、当接板16
などの反力受け手段を前記埋め戻すべきトンネルの覆工
32の内周面32aなどの内周部に対して当接係合自在に設
け、前記反力受け手段と遮断手段間に面板連結器12など
の連結推進手段を、前記反力受け手段との間で前記遮断
手段の移動方向に相対的に移動駆動自在に設け、埋め戻
し材注入管10などの埋め戻し材注入手段を、埋め戻し材
36を前記遮断手段の後方に注入し得る形で設けて構成し
たので、外殻２、隔壁３、内筒５、及び遮断手段によっ
て、トンネル30の未埋め戻し部分35を地山40、埋め戻し
部分37の圧力に対抗する形で包囲して、トンネル30の外
側の地山40をカッタ7aによって掘削することが出来、地
山40の掘削により、外殻２、隔壁３、内筒５、及び遮断
手段をトンネル30の未埋め戻し部分35に前進させること
が出来、前進した遮断手段の後方の埋め戻し部分37に埋
め戻し材36を充填することにより、不要なトンネル30を
好適に埋め戻すことが出来る。この際、内筒５のシール
部材を、押圧部材によってトンネル30の外周に押圧し
て、掘削手段による掘削によって凹凸が生じたトンネル
30の外周に追従させることが出来るので、トンネル30の
外周と内筒５との間隙は好適に止水され、地山40側から
トンネル30の未埋め戻し部分35に地下水、泥水等が漏洩
することを防止することが出来る。Further, the present invention has an outer shell 2, and inside the outer shell 2,
An inner cylinder 5 having an inner diameter larger than the outer diameter of the tunnel 30 to be backfilled is provided, a sealing member such as a wire brush 24 formed in an annular shape is provided inside the inner cylinder, and further, inside the inner cylinder, A pressing member such as a bellows 25 for pressing the sealing member inward is provided, and a partition wall 3 is provided between the outer shell and the inner cylinder.
In the front of the bulkhead, a cutter 7a capable of excavating the ground in a circular shape is provided rotatably, and inside the outer shell behind the bulkhead, the space inside the outer shell is forward and backward. A blocking means such as a face plate 9 for blocking is provided so as to be able to move forward and backward with respect to the outer shell, and a propulsion jack such as a propulsion jack 6 is provided on the outer shell so as to be able to press against the blocking means.
Lining of tunnel to be backfilled with reaction force receiving means such as
An inner peripheral portion such as an inner peripheral surface 32a of 32 is provided so as to be able to abut and engage, and a connection propulsion means such as a face plate coupler 12 is provided between the reaction force receiving means and the blocking means, and The back-filling material injection means such as the back-filling material injection pipe 10 is provided so as to be relatively movable and movable in the moving direction of the blocking means.
36 is provided so as to be able to be injected into the rear of the blocking means, so that the outer shell 2, the partition wall 3, the inner cylinder 5, and the blocking means allow the unfilled portion 35 of the tunnel 30 to be ground 40 and backfilled. The ground 40 outside the tunnel 30 can be excavated by the cutter 7a, surrounding it in a manner opposing the pressure of the part 37, and the excavation of the ground 40 results in the outer shell 2, the bulkhead 3, the inner cylinder 5, and The blocking means can be advanced to the unbackfilled portion 35 of the tunnel 30 and the backfilling portion 37 behind the advancing blocking means is filled with the backfill material 36, so that the unnecessary tunnel 30 can be suitably backfilled. Can be done. At this time, the sealing member of the inner cylinder 5 is pressed against the outer periphery of the tunnel 30 by a pressing member, and the
Since it is possible to follow the outer circumference of the tunnel 30, the gap between the outer circumference of the tunnel 30 and the inner cylinder 5 is suitably stopped, and groundwater, muddy water, etc. leak from the ground 40 side to the unfilled portion 35 of the tunnel 30. Can be prevented.
また、反力受け手段を前記埋め戻すべきトンネルの覆
行32の内周部に対して当接係合自在に設け、前記反力受
け手段と遮断手段間に連結推進手段を、前記反力受け手
段との間で前記遮断手段の移動方向に相対的に移動駆動
自在に設けたので、遮断手段を前進させる際の反力、外
殻２の推進反力及びカッタ1aの掘削反力は反力受け手段
を介して全て埋め戻すべきトンネル覆行の内周部から取
ることが出来る。従って、推進反力及び掘削反力などを
埋戻材側から取る必要が無く、埋戻材の締め固め状態の
如何に係らず適正な反力をトンネル覆工内周部側から適
切に取ることが出来、信頼性の高い施工が可能となる。Further, a reaction force receiving means is provided so as to be able to abut against and engage with an inner peripheral portion of the lining 32 of the tunnel to be backfilled, and a connection propulsion means is provided between the reaction force receiving means and the shutoff means. Since it is provided so as to be relatively movable in the direction of movement of the blocking means with respect to the means, the reaction force when the blocking means is advanced, the propulsion reaction force of the outer shell 2 and the excavation reaction force of the cutter 1a are reaction forces. All can be taken from the inner periphery of the tunnel lining to be backfilled via the receiving means. Therefore, it is not necessary to take propulsion reaction force and excavation reaction force from the backfill material side, and to take appropriate reaction force appropriately from the inner peripheral side of the tunnel lining regardless of the compacted state of the backfill material. And highly reliable construction is possible.
【図面の簡単な説明】 第１図乃至第４図は、本発明によるトンネル埋め戻し方
法の一実施例を示す工程図、 第５図は、第１図に示すシールド埋め戻し装置のＶ矢視
図、 第６図は、第１図に示すシールド埋め戻し装置の隔壁近
傍の拡大図、 第７図は、第６図に示すシールド埋め戻し装置の内筒近
傍の拡大図である。 ２……外殻 ３……隔壁 ５……内筒 7a……掘削手段（カッタ） ９……遮断手段（面板） ６……推進ジャッキ（油圧ジャッキ） 10……埋め戻し材注入手段（埋め戻し材注入管） 12……連結推進手段（面板連結器） 16……反力受け手段（当接板） 24……シール部材（ワイヤブラシ） 25……押圧部材（ベローズ） 30……トンネル 32……覆工 32a……内周部（内周面） 35……未埋め戻し部分 36……埋め戻し材 37……埋め戻し部分 40……地山BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 4 are process diagrams showing an embodiment of a tunnel backfill method according to the present invention, and FIG. 5 is a view of the shield backfill device shown in FIG. FIG. 6 is an enlarged view of the vicinity of the partition wall of the shield back-filling device shown in FIG. 1, and FIG. 7 is an enlarged view of the vicinity of the inner cylinder of the shield back-filling device shown in FIG. 2 ... outer shell 3 ... partition wall 5 ... inner cylinder 7a ... excavation means (cutter) 9 ... blocking means (face plate) 6 ... propulsion jack (hydraulic jack) 10 ... backfilling material injection means (backfill) Material injection pipe) 12 Connection propulsion means (face plate coupler) 16 Reaction force receiving means (contact plate) 24 Seal member (wire brush) 25 Press member (bellows) 30 Tunnel 32 … Lining 32a… inner circumference (inner circumference) 35… unfilled part 36… backfill material 37… backfilled part 40… ground mountain
フロントページの続き (56)参考文献 特開 平２−157400（ＪＰ，Ａ) 特開 昭59−102084（ＪＰ，Ａ) 特公 昭47−42093（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.6，ＤＢ名) E21D 9/06 301 E21F 15/00 Continuation of front page (56) References JP-A-2-157400 (JP, A) JP-A-59-102084 (JP, A) JP-B-47-42093 (JP, B1) (58) Fields investigated (Int) .Cl. 6 , DB name) E21D 9/06 301 E21F 15/00
Claims (2)
包囲し、 外殻により前記内筒の外側を包囲し、 前記内筒と前記外殻の間を、隔壁によって閉鎖し、 前記隔壁の前方に円環状のカッタを回転駆動自在に設
け、 前記隔壁の後方の前記外殻の内側において、遮断手段に
より前記トンネルの未埋め戻し部分と埋め戻し部分とを
遮断し、 前記遮断手段を前記外殻に対して前進後退自在に設け、 前記外殻に推進ジャッキを前記遮断手段に対して押圧自
在に設け、 反力受け手段を前記埋め戻すべきトンネルの覆工の内周
部に対して当接係合自在に設け、 前記反力受け手段と前記遮断手段間に連結推進手段を、
前記反力受け手段との間で前記遮断手段の移動方向に相
対的に移動駆動自在に設け、 前記内筒の内側に、環状に形成されたシール部材を設け
ておき、 該シール部材を、押圧部材により前記トンネルの外周に
押圧しつつ、 前記反力受け手段を前記トンネルの覆工内周部に対して
当接係合させた状態で、前記推進ジャッキを前記遮断手
段に対して押圧して前記トンネル覆工内周部から掘削反
力を得る形で前記隔壁の前方の前記トンネルの外側の地
山を前記カッタにより環状に掘削して、前記外殻、前記
隔壁、及び前記内筒を前進させ、 更に、前記連結推進手段を駆動して前記反力受け手段か
ら反力を受ける形で前記遮断手段を未埋め戻し部分に前
進させると共に、当該遮断手段の後方の埋め戻し部分に
埋め戻し材を充填してゆくようにして構成したトンネル
埋め戻し方法。1. An inner cylinder encloses the outside of a tunnel to be backfilled, an outer shell encloses an outer side of the inner cylinder, a space between the inner cylinder and the outer shell is closed by a partition, and a front of the partition. An annular cutter is rotatably driven, and an unrefilled portion and a backfilled portion of the tunnel are blocked by blocking means inside the outer shell behind the partition, and the blocking means is connected to the outer shell. A propulsion jack is provided on the outer shell so as to be able to press against the blocking means, and a reaction force receiving means is brought into contact with the inner peripheral portion of the lining of the tunnel to be backfilled. Joint propulsion means between the reaction force receiving means and the blocking means,
An annular seal member is provided inside the inner cylinder so as to be movable relative to the reaction force receiving unit in the movement direction of the blocking unit, and the seal member is pressed. Pressing the propulsion jack against the blocking means while pressing the reaction force receiving means against the inner circumference of the lining of the tunnel while pressing against the outer circumference of the tunnel by a member The ground outside the tunnel in front of the bulkhead is excavated in an annular shape by the cutter so as to obtain a drilling reaction force from the inner periphery of the tunnel lining, and the outer shell, the bulkhead, and the inner cylinder are advanced. Further, the connection propulsion means is driven to advance the blocking means to a non-backfilled portion in a form receiving a reaction force from the reaction force receiving means, and a backfill material is provided in a backfilling portion behind the blocking means. It is configured to fill with Tunnel backfill method.
きな内径の内筒を設け、 該内筒の内側に、環状に形成されたシール部材を設け、 更に、前記内筒の内側に、前記シール部材を内側に押圧
する押圧部材を設け、前記外殻と前記内筒との間に、隔
壁を環状に設け、 前記隔壁の前方に、地山を環状に掘削し得るカッタを回
転駆動自在に設け、 前記隔壁の後方の前記外殻の内側に、当該外殻の内部の
空間を前後に遮断する遮断手段を前記外殻に対して前進
後退自在に設け、 前記外殻に推進ジャッキを前記遮断手段に対して押圧自
在に設け、 反力受け手段を前記埋め戻すべきトンネルの覆工の内周
部に対して当接係合自在に設け、 前記反力受け手段と遮断手段間に連結推進手段を、前記
反力受け手段との間で前記遮断手段の移動方向に相対的
に移動駆動自在に設け、 埋め戻し材注入手段を、埋め戻し材を前記遮断手段の後
方に注入し得る形で設けて構成したシールド埋め戻し装
置。2. An inner shell having an outer shell, an inner cylinder having an inner diameter larger than an outer diameter of a tunnel to be backfilled is provided inside the outer shell, and an annular sealing member is provided inside the inner cylinder. Further, a pressing member for pressing the seal member inward is provided inside the inner cylinder, and a partition wall is provided between the outer shell and the inner cylinder in an annular shape. A cutter capable of rotating and digging a ring is provided rotatably, and a blocking means for blocking a space inside the outer shell back and forth inside the outer shell behind the partition wall is freely retractable with respect to the outer shell. A propulsion jack is provided on the outer shell so as to be able to press against the blocking means, and a reaction force receiving means is provided so as to be able to abut against and engage with the inner peripheral portion of the lining of the tunnel to be backfilled. A connecting propulsion means between the reaction force receiving means and the blocking means, Movement direction relative movement driving freely provided the cross section, backfill material injection means, backfilling shield backfill material which is configured by providing a form which may be injected behind the blocking means device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2200678A JP2935467B2 (en) | 1990-07-27 | 1990-07-27 | Tunnel backfill method and shield backfill device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2200678A JP2935467B2 (en) | 1990-07-27 | 1990-07-27 | Tunnel backfill method and shield backfill device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP37499198A Division JP2965986B2 (en) | 1998-12-10 | 1998-12-10 | Shield backfill device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0485491A JPH0485491A (en) | 1992-03-18 |
| JP2935467B2 true JP2935467B2 (en) | 1999-08-16 |
Family
ID=16428430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2200678A Expired - Lifetime JP2935467B2 (en) | 1990-07-27 | 1990-07-27 | Tunnel backfill method and shield backfill device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2935467B2 (en) |
-
1990
- 1990-07-27 JP JP2200678A patent/JP2935467B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0485491A (en) | 1992-03-18 |
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