JP2000213278A - Method for connecting shield tunnel - Google Patents

Method for connecting shield tunnel

Info

Publication number
JP2000213278A
JP2000213278A JP1240599A JP1240599A JP2000213278A JP 2000213278 A JP2000213278 A JP 2000213278A JP 1240599 A JP1240599 A JP 1240599A JP 1240599 A JP1240599 A JP 1240599A JP 2000213278 A JP2000213278 A JP 2000213278A
Authority
JP
Japan
Prior art keywords
tunnel
shield
excavation
preceding tunnel
curved part
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.)
Granted
Application number
JP1240599A
Other languages
Japanese (ja)
Other versions
JP3895881B2 (en
Inventor
Kenichi Kaneko
研一 金子
Isao Dobashi
功 土橋
Nobuaki Kobayashi
信明 小林
Osamu Kaji
修 梶
Masahiro Nakamura
昌宏 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taisei Corp
Original Assignee
Taisei Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Taisei Corp filed Critical Taisei Corp
Priority to JP01240599A priority Critical patent/JP3895881B2/en
Publication of JP2000213278A publication Critical patent/JP2000213278A/en
Application granted granted Critical
Publication of JP3895881B2 publication Critical patent/JP3895881B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

PROBLEM TO BE SOLVED: To construct a long-distant shield tunnel by excavating a following tunnel toward the curved part of a preceding tunnel, cutting out the curved part of the preceding tunnel to continue the excavation, and then continuously excavating the following tunnel toward the direction leaving the preceding tunnel. SOLUTION: In a preceding tunnel 1, an inclined shaft is constructed extending from the ground surface to the centerline of the tunnel long a plane α, and the excavation is performed with the center of a shield machine being conformed to a design line. In the curved part of the preceding tunnel 1, the segment situated on the outside of the curve is constructed by use of a soft segment 12. A following tunnel 2 is excavated toward the curved part of the preceding tunnel 1, and the excavation is performed in the state where the centerline is conformed to the design line. When it gets close to the preceding tunnel 1, the outside soft segment 12 and internal air mortar 14 of the preceding tunnel 1 are cut out to continue the excavation, and the excavation is performed until the projected sections of the following tunnel 2 and the preceding tunnel 1 are conformed to each other, and then further continued along a plane β.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、シールドトンネル
の連結方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting shield tunnels.

【0002】[0002]

【従来の技術】トンネルの距離が長くなると1台のシー
ルド掘進機で掘進するには工期が長くなりすぎる。その
ために両側からシールド掘進機を発進させて地中で合体
させる工法が採用されている。しかしさらに距離が長く
なると、中間に立坑を構築し、その立坑からシールド掘
進機を発進させ、1台のシールド掘進機で掘進する距離
を短くする工法を採用せざるを得ない。
2. Description of the Related Art When the distance of a tunnel becomes long, the construction period becomes too long to excavate with one shield excavator. For this purpose, a construction method in which shield excavators are started from both sides and coalesced underground is adopted. However, when the distance is further increased, it is necessary to adopt a method of constructing a shaft in the middle, starting a shield excavator from the shaft, and shortening the excavation distance with one shield excavator.

【0003】[0003]

【本発明が解決しようとする課題】しかし前記したよう
な中間に立坑を構築する工法では、トンネルが深くなる
と多額の立坑構築の費用や、長い工事期間を要する。
However, in the method of constructing a shaft in the middle as described above, when the tunnel becomes deep, a large amount of shaft construction cost and a long construction period are required.

【0004】[0004]

【本発明の目的】本発明は上記したような従来の問題を
解決するためになされたもので、大規模な中間立坑を設
置する必要がなく、長距離のシールドトンネルを構築す
ることができる、シールドトンネルの連結方法を提供す
ることを目的とする。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and does not require the installation of a large-scale intermediate shaft, and can construct a long-distance shield tunnel. An object of the present invention is to provide a method for connecting a shield tunnel.

【0005】[0005]

【課題を解決するための手段】上記のような目的を達成
するために、本発明のシールドトンネルの連結方法は、
先行して1本の曲線シールドトンネルを構築し、この先
行トンネルの曲線部に向けて、他の後行トンネルを掘進
し、後行トンネルによって、先行トンネルの曲線部を削
り取って掘進を続け、その後に後行トンネルは、先行ト
ンネルから離れる方向に向けて掘進を続けて行う、シー
ルドトンネルの連結方法を特徴としたものである。
In order to achieve the above object, a method for connecting a shield tunnel according to the present invention comprises:
One curved shield tunnel was constructed in advance, and another trailing tunnel was dug toward this curved part of the preceding tunnel, and the trailing tunnel cut off the curved part of the preceding tunnel and continued excavation. The trailing tunnel is characterized by a method of connecting shield tunnels that continuously excavates in a direction away from the preceding tunnel.

【0006】さらに本発明のシールド掘進機の連結方法
は、先行して1本の曲線シールドトンネルを構築し、こ
の先行トンネルの曲線部に向けて、他の後行トンネルを
掘進し、後行トンネルによって、先行トンネルの曲線部
を削り取って掘進を続け、両トンネルの軸線を一致させ
た後に、後行トンネルのシールド掘進機の外筒の一部
を、先行トンネルの外部に被覆して行う、シールドトン
ネルの連結方法を特徴としたものである。
Further, in the connecting method of the shield excavator according to the present invention, one curved shield tunnel is previously constructed, and another trailing tunnel is dug toward the curved portion of the preceding tunnel, and the trailing tunnel is constructed. By cutting off the curved part of the preceding tunnel and continuing excavation, after aligning the axes of both tunnels, shielding the outer tunnel of the leading tunnel with a part of the outer cylinder of the shield tunneling machine of the following tunnel It features a tunnel connection method.

【0007】[0007]

【本発明の実施の態様】以下図面を参照しながら本発明
のシールドトンネルの連結方法の実施例について説明す
る。
Embodiments of the present invention will be described below with reference to the accompanying drawings.

【0008】<イ>先行トンネルの構築。 先行して1本のシールドトンネルを構築する。この先行
トンネル1は、特に曲線シールドトンネルとして形成す
る。すなわち、地上から例えば平面αに沿って斜坑を、
所定のトンネルの中心線に至るまで構築し、その後にシ
ールド掘進機の中心を設計ラインに合致させて掘進を行
う。先行シールド掘進機11の掘進と、その掘削跡をシ
ールド掘進機11内部で組み立てたセグメントによって
被覆する工程は従来と同様である。
<A> Construction of preceding tunnel. First, one shield tunnel will be constructed. This leading tunnel 1 is formed in particular as a curved shield tunnel. That is, from the ground, for example, along a plane α,
The tunnel is constructed up to the center line of a predetermined tunnel, and thereafter the excavation is performed by matching the center of the shield machine to the design line. The excavation of the preceding shield machine 11 and the process of covering the excavation trace with the segments assembled inside the shield machine 11 are the same as those in the related art.

【0009】<ロ>先行トンネル1の曲線部の構造。 先行トンネル1の曲線部では、曲線の外側に位置するセ
グメントの一部を、切削が容易な材料で形成した軟質セ
グメント12で構築しておく。切削が容易な材料とは例
えば鉄筋の代わりに炭素繊維を配置したコンクリートな
どである。また軟質セグメント12間、あるいは軟質セ
グメント12と鉄筋コンクリート製の一般セグメント間
の結合にも炭素繊維を合成樹脂で固めたボルトなどを利
用する。そして先行トンネル1の内部には、後述するよ
うに、後行トンネル2が接触して離れて行く通路の形状
を予測して円弧状の仕切り壁13を構築しておく。この
円弧状の仕切り壁13の外側に、切削容易な軟質セグメ
ント12を配置し、セグメント12と仕切り壁13との
間の空間は、エアモルタル14などで充填しておく。仕
切り壁13は、コンクリート製の円弧状セグメントを利
用できるが、鋼材を円弧状の壁に形成し、その内側を支
柱で支持するような構成を採用することもできる。
<B> The structure of the curved portion of the preceding tunnel 1. In the curved portion of the preceding tunnel 1, a part of the segment located outside the curve is constructed of a soft segment 12 formed of a material that is easy to cut. The material that is easy to cut is, for example, concrete in which carbon fibers are arranged instead of reinforcing bars. In addition, bolts made of carbon fiber fixed with a synthetic resin are used for the connection between the soft segments 12 or between the soft segments 12 and the general segments made of reinforced concrete. As described later, an arc-shaped partition wall 13 is constructed in the interior of the preceding tunnel 1 by predicting the shape of a passage to which the following tunnel 2 comes in contact and separates. A soft segment 12 that is easy to cut is arranged outside the arc-shaped partition wall 13, and the space between the segment 12 and the partition wall 13 is filled with an air mortar 14 or the like. The partition wall 13 can use a concrete arc-shaped segment, but it is also possible to adopt a configuration in which a steel material is formed into an arc-shaped wall and the inside thereof is supported by a column.

【0010】<ハ>後行トンネル2の構築。 この先行トンネル1の曲線部に向けて、他の後行トンネ
ル2を掘進する。この後行トンネル2の中心線は、トン
ネルの設計ラインに合致した状態で掘進を続ける。この
後行トンネル2の構築も従来の工法と同様である。
<C> Construction of trailing tunnel 2 Another trailing tunnel 2 is dug toward the curved part of the preceding tunnel 1. The center line of the following tunnel 2 continues excavation in a state where it matches the design line of the tunnel. The construction of the subsequent tunnel 2 is the same as the conventional method.

【0011】<ニ>後行トンネル2の接触。 後行トンネル2の掘進方向の前方にはすでに先行トンネ
ル1が構築してある。したがって後行トンネル2のシー
ルド掘進機は、先行トンネル1の曲線部に徐々に接近す
る。接近したら後行トンネル2のシールド掘進機によっ
て、先行トンネル1の外側の軟質セグメント12、およ
び内部のエアモルタル14などを削り取って掘進を続け
る。その際に、後行トンネル2の先行トンネル1側の壁
が、先行トンネル1の仕切り壁13に接触した状態で構
築される。
<D> Contact of the trailing tunnel 2. The preceding tunnel 1 has already been constructed ahead of the trailing tunnel 2 in the direction of excavation. Therefore, the shield machine of the following tunnel 2 gradually approaches the curved part of the preceding tunnel 1. When approaching, the excavator of the trailing tunnel 2 scrapes off the soft segment 12 outside and the air mortar 14 inside the preceding tunnel 1 and continues to excavate. At that time, the wall of the succeeding tunnel 2 on the side of the preceding tunnel 1 is constructed in contact with the partition wall 13 of the preceding tunnel 1.

【0012】<ホ>後行トンネル2の離脱。 後行トンネル2のシールド掘進機21は、後行トンネル
2の投影断面が先行トンネル1の投影断面と一致するま
で先行トンネル1の軟質セグメント12を削り取って掘
進を続ける。 その後に後行トンネル2は、中心線から
外れる方向、すなわち先行トンネル1から離れる方向に
向けて平面βに沿って掘進を続ける。こうして、両トン
ネルは別方向から掘進してきて曲線部で接触し、その後
に離れる状態に配置されるから、両トンネルはX字状に
連結し、中心線が一致した2本のトンネルが連結するこ
とになる。
<E> Departure of the trailing tunnel 2. The shield machine 21 of the trailing tunnel 2 cuts out the soft segment 12 of the preceding tunnel 1 and continues digging until the projected section of the trailing tunnel 2 matches the projected section of the preceding tunnel 1. Thereafter, the trailing tunnel 2 continues digging along the plane β in a direction away from the center line, that is, in a direction away from the preceding tunnel 1. In this way, the two tunnels are dug from different directions and come into contact at the curved part, and then are separated from each other. Therefore, both tunnels are connected in an X-shape, and two tunnels with the same center line are connected. become.

【0013】<ヘ>両トンネルの貫通。 周囲の地盤を改良して補強した後、先行トンネル1の仕
切り壁13、後行トンネル1の外側のセグメントを解体
して両トンネル間に存在する壁面を撤去し、貫通させ
る。その後に内部の梁などを構築して完成する。
<F> Penetration of both tunnels. After the surrounding ground is improved and reinforced, the partition wall 13 of the preceding tunnel 1 and the outer segment of the following tunnel 1 are dismantled, and the walls existing between the two tunnels are removed and penetrated. After that, the internal beams are constructed and completed.

【0014】<ト>直接合体する工法。 以上の工法は、後行トンネル2のシールド掘進機21
が、先行トンネル1への連結後には中心線から外側に外
れてゆく方法であったが、後行トンネル2をそのまま先
行トンネル1へ連結することもできる。そのために先行
トンネル1の曲線部は外側に軟質セグメントを配置し、
その内部はエアモルタル14などを充填しておく。そし
て後行トンネル2のシールド掘進機は先行トンネル1の
曲線部に進入させ、両トンネルの軸線が一致した状態
で、先行トンネル1の外側の軟質セグメント12および
内部のエアモルタル14を削り取って掘進を続ける。後
行シールド掘進機21が完全に先行トンネル1内部に位
置した状態で、後行シールド掘進機21の内部装置と外
筒22とを分離する。そして推進ジャッキを使用して外
筒22のみを前進させ、先行トンネル1の外部に被せ
る。両トンネルの外径が同一寸法であれば後行シールド
掘進機21の外筒22は、先行トンネル1を外部から覆
うことができる。その後にシールド掘進機21の内部の
装置やモルタルを撤去して両トンネルを貫通し、トンネ
ルの連結を完了する。
<G> A method of directly merging. The above construction method uses the shield tunneling machine 21 of the following tunnel 2
However, after the connection to the preceding tunnel 1, it is a method of deviating from the center line to the outside, but the following tunnel 2 can be connected to the preceding tunnel 1 as it is. For this purpose, the curved section of the preceding tunnel 1 has a soft segment on the outside,
The inside is filled with an air mortar 14 or the like. Then, the shield excavator of the succeeding tunnel 2 enters the curved portion of the preceding tunnel 1, and in a state where the axes of both tunnels coincide with each other, the soft segment 12 outside the preceding tunnel 1 and the air mortar 14 inside the preceding tunnel 1 are scraped off and excavated. to continue. In a state where the trailing shield machine 21 is completely located inside the preceding tunnel 1, the internal device of the trailing shield machine 21 and the outer cylinder 22 are separated. Then, only the outer cylinder 22 is advanced using the propulsion jack, and is put on the outside of the preceding tunnel 1. If the outer diameters of both tunnels are the same, the outer cylinder 22 of the trailing shield machine 21 can cover the preceding tunnel 1 from the outside. After that, the device and the mortar inside the shield machine 21 are removed to penetrate both tunnels, and the connection of the tunnels is completed.

【0015】[0015]

【本発明の効果】本発明のシールドトンネルの連結方法
は以上説明したようになるから次のような効果を得るこ
とができる。 <イ>中間立坑を構築するほどの規模を要せずに、斜坑
トンネルを構築する程度の作業によって、1台のシール
ド掘進機による掘進から他のシールド掘進機による掘進
へと切り替えを行うことができる。したがって中間立坑
を設けることなく、短い工期で経済的に長距離のトンネ
ル構築することができる。 <ロ>先行トンネル1の曲線部に、事前に後行シールド
掘進機の通過位置に合わせた仕切り壁を設置してあり、
後行シールド掘進機はその仕切り壁の外側のセグメント
を削り取る状態で前進を続ける。したがって後行トンネ
ル2は正確なガイドにしたがって曲線部を通過すること
ができ、精度の高い連結を行うことができる。 <ハ>先行トンネル1の曲線部に、後行トンネル2を背
後から連結することができるから、平面的にY字状、X
字状の連結を行うことができる。 <ニ>路線の直上に立坑の用地がなくとも施工すること
ができる。
According to the method for connecting the shield tunnel of the present invention as described above, the following effects can be obtained. <a> It is possible to switch from excavation by one shield excavator to excavation by another shield excavator by work that is similar to constructing an inclined shaft tunnel without requiring a scale sufficient to construct an intermediate shaft. it can. Therefore, a long tunnel can be constructed economically in a short construction period without providing an intermediate shaft. <B> In the curved part of the preceding tunnel 1, a partition wall has been installed in advance in accordance with the passing position of the trailing shield machine,
The trailing shield machine continues to advance, cutting off the outer segments of the partition. Therefore, the trailing tunnel 2 can pass through the curved portion according to an accurate guide, and a highly accurate connection can be performed. <C> Since the trailing tunnel 2 can be connected to the curved portion of the preceding tunnel 1 from behind, it is Y-shaped and X-shaped in plan.
A letter-shaped connection can be made. <D> Construction is possible even if there is no site for a shaft directly above the line.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明のシールドトンネルの連結方法の施工順
序の説明図。
FIG. 1 is an explanatory view of a construction order of a shield tunnel connecting method of the present invention.

【図2】施工順序の説明図。FIG. 2 is an explanatory view of a construction order.

【図3】施工順序の説明図。FIG. 3 is an explanatory view of a construction order.

【図4】施工順序の説明図。FIG. 4 is an explanatory view of a construction order.

【図5】先行トンネルの曲線部の説明図。FIG. 5 is an explanatory diagram of a curved portion of a preceding tunnel.

【図6】シールドトンネルの他の連結方法の施工順序の
説明図。
FIG. 6 is an explanatory view of a construction order of another connection method of the shield tunnel.

【図7】他の施工順序の説明図。FIG. 7 is an explanatory view of another construction order.

【図8】他の施工順序の説明図。FIG. 8 is an explanatory view of another construction order.

【図9】他の施工順序の説明図。FIG. 9 is an explanatory view of another construction order.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 小林 信明 東京都新宿区西新宿一丁目25番1号 大成 建設株式会社内 (72)発明者 梶 修 東京都新宿区西新宿一丁目25番1号 大成 建設株式会社内 (72)発明者 中村 昌宏 東京都新宿区西新宿一丁目25番1号 大成 建設株式会社内 Fターム(参考) 2D054 AA02 AA04 AA07 AC01 EA09 FA01  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Nobuaki Kobayashi, Inventor 1-25-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Osamu Kaji 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Masahiro Nakamura 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo F-term (reference) 2D054 AA02 AA04 AA07 AC01 EA09 FA01

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】先行して1本の曲線シールドトンネルを構
築し、 この先行トンネルの曲線部に向けて、他の後行トンネル
を掘進し、 後行トンネルによって、先行トンネルの曲線部を削り取
って掘進を続け、 その後に後行トンネルは、先行トンネルから離れる方向
に向けて掘進を続けて行う、 シールドトンネルの連結方法。
1. A curved shield tunnel is constructed in advance, and another trailing tunnel is dug toward the curved part of the preceding tunnel. The trailing tunnel cuts off the curved part of the leading tunnel. A method of connecting shield tunnels that continues excavating, and then continues to excavate the subsequent tunnel in a direction away from the preceding tunnel.
【請求項2】先行して1本の曲線シールドトンネルを構
築し、 この先行トンネルの曲線部に向けて、他の後行トンネル
を掘進し、 後行トンネルによって、先行トンネルの曲線部を削り取
って掘進を続け、 両トンネルの軸線を一致させた後に、 後行トンネルのシールド掘進機の外筒の一部を、 先行トンネルの外部に被覆して行う、 シールドトンネルの連結方法。
2. A curved shield tunnel is constructed in advance, and another trailing tunnel is dug toward the curved part of the preceding tunnel, and the trailing tunnel cuts off the curved part of the leading tunnel. A method of joining shield tunnels in which excavation is continued, and after aligning the axes of both tunnels, a part of the outer cylinder of the shield tunneling machine of the following tunnel is covered outside the preceding tunnel.
JP01240599A 1999-01-20 1999-01-20 Shield tunnel connection method Expired - Fee Related JP3895881B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP01240599A JP3895881B2 (en) 1999-01-20 1999-01-20 Shield tunnel connection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP01240599A JP3895881B2 (en) 1999-01-20 1999-01-20 Shield tunnel connection method

Publications (2)

Publication Number Publication Date
JP2000213278A true JP2000213278A (en) 2000-08-02
JP3895881B2 JP3895881B2 (en) 2007-03-22

Family

ID=11804362

Family Applications (1)

Application Number Title Priority Date Filing Date
JP01240599A Expired - Fee Related JP3895881B2 (en) 1999-01-20 1999-01-20 Shield tunnel connection method

Country Status (1)

Country Link
JP (1) JP3895881B2 (en)

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* Cited by examiner, † Cited by third party
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JP2005299087A (en) * 2004-04-06 2005-10-27 Zenitaka Corp Junction coupling of tunnel, junction structure of tunnel and junction method of tunnel
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