JP2551506B2 - Construction method of arch shell in tunnel precedent - Google Patents
Construction method of arch shell in tunnel precedentInfo
- Publication number
- JP2551506B2 JP2551506B2 JP3175234A JP17523491A JP2551506B2 JP 2551506 B2 JP2551506 B2 JP 2551506B2 JP 3175234 A JP3175234 A JP 3175234A JP 17523491 A JP17523491 A JP 17523491A JP 2551506 B2 JP2551506 B2 JP 2551506B2
- Authority
- JP
- Japan
- Prior art keywords
- tunnel
- arch
- arch shell
- shell
- precedent
- 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
【０００１】[0001]
【産業上の利用分野】本発明はトンネル掘削の補助工法
の一つである先受工におけるアーチシエルの構築方法に
係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an arch shell in pre-construction, which is one of auxiliary methods for tunnel excavation.
【０００２】[0002]
【従来の技術】前記先受工法として種々の方法が提案さ
れているが、これらの工法はトンネル掘削切羽より前方
に向けて一定の長さの先受工を施工する方法である。2. Description of the Related Art Various methods have been proposed as the above-mentioned pre-construction method, and these construction methods are methods of constructing a pre-construction of a predetermined length forward from a tunnel excavation face.
【０００３】[0003]
【発明が解決しようとする課題】前記従来の先受工法は
トンネル掘削切羽より施工するため、トンネルの掘削作
業と競合し、掘削サイクルタイム内の作業となる。また
前記従来の方法では、先受工の長尺化には自ずから限度
がある。本発明は前記従来技術の有する問題点に鑑みて
提案されたもので、その目的とする処は、トンネル掘削
とは独立、先行したアーチシエル構築の連続作業が可能
となり、超大断面のトンネルまで安全且つ速やかに掘進
できるトンネル先受工におけるアーチシエルの構築方法
を提供する点にある。Since the above-mentioned conventional pre-installation method is performed from a tunnel excavation face, it competes with a tunnel excavation operation and is performed within an excavation cycle time. Further, in the above-mentioned conventional method, there is a limit to the lengthening of the preparatory work. The present invention has been proposed in view of the problems of the prior art described above, and its purpose is to be independent of tunnel excavation, to enable continuous work of preceding arch shell construction, and to secure a tunnel with a very large section. Another object of the present invention is to provide a method for constructing an arch shell in a tunnel precedent which can be dug quickly.
【０００４】[0004]
【課題を解決するための手段】前記の目的を達成するた
め、本発明に係るトンネル先受工におけるアーチシエル
の構築方法によれば、頂設導坑を先行掘削し、同頂設導
坑から円弧状地下連続壁掘削機によって左右のアーチシ
エル部を構築し、前記頂設導坑内にコンクリートを打設
して前記左右のアーチシエル部を結合し、トンネル掘削
切羽前方にアーチシエルを構築するものである。In order to achieve the above-mentioned object, according to the method for constructing an arch shell in a tunnel receiving work according to the present invention, a top digging tunnel is preliminarily excavated from the top digging tunnel. Constructing left and right arch shells with an arcuate underground continuous wall excavator, placing concrete in the top pit to join the left and right arch shells, and building the arch shell in front of the tunnel excavation face Is.
【０００５】[0005]
【作用】本発明は前記したように、トンネル掘削に先行
して頂設導坑を掘削して、同頂設導坑を作業坑として利
用し、同頂設導坑から円弧状地下連続壁掘削機によって
左右のアーチシエル部を構築したのち、前記頂設導坑内
にコンクリートを打設することによって、前記左右の各
アーチシエル部を結合し、かくしてトンネル掘削と独
立、先行してトンネル切羽前方にアーチシエルを構築す
るものである。As described above, the present invention excavates the top pit prior to tunnel excavation, utilizes the top pit as a work pit, and excavates an arcuate underground continuous wall from the top pit. After constructing the left and right arch shells with a machine, by placing concrete in the top pit, the left and right arch shells are connected, thus independent of tunnel excavation, ahead of the tunnel face. This is what builds Arch Ciel.
【０００６】[0006]
【実施例】以下本発明を図示の実施例について説明す
る。トンネル断面外上部中央に公知の方法で頂設導坑１
を掘削する。（図３参照）次いで同頂設導坑１内に円弧
状地下連続壁掘削機２によって左右のアーチシエル部３
の掘削を行ない、コンクリート打設、または泥水固化に
よって前記一双のアーチシエル部３ａを左右併進で構築
する。（図４参照）前記掘削機２は掘削機本体よりカツ
ター部２ａを先端に支持し、且つ所要の剛性を有する円
弧状ロツド２ｂを継接していくように構成されている。
なお前記掘削機２によるアーチシエル部３ａの掘削に先
行して、頂設導坑１に導入されたパイロツト掘削機４に
よってパイロツト孔５を掘削し、同パイロツト孔５を案
内として前記掘削機２によるアーチシエル部３ａの掘削
を行なうものである。（図２参照）次いで前記頂設導坑
１内でシエルコンクリート３ｂを打設して、左右のアー
チシエル部３ａを一体化して、トンネル掘削切羽前面に
アーチシエル３を構築する。（図５参照）次いで前記ア
ーチシエル３内でトンネル本体６を施工するが、同トン
ネル本体６の施工は剛強なアーチシエル３内での掘削作
業となるので、超大型断面トンネルも安全且つ速やかに
掘進されるものである。（図６参照）次いで前記掘削機
２を解体して撤去するとともに、前記頂設導坑１の埋め
戻しを行なう。（図７参照）図中７は埋戻し土である。The present invention will be described below with reference to the illustrated embodiments. In the center of the upper section outside the tunnel cross section, a well-established tunnel 1
To drill. (See Fig. 3) Next, inside the same tunnel 1 the left and right arch shell parts 3 were formed by the arcuate underground continuous wall excavator 2.
Is excavated, concrete is poured, or mud water is solidified to construct the pair of arch shells 3a in parallel. (Refer to FIG. 4) The excavator 2 is constructed such that the excavator main body supports the cutter portion 2a at the tip and the arc-shaped rod 2b having a required rigidity is spliced.
Prior to the excavation of the arch shell 3a by the excavator 2, the pilot excavator 4 introduced into the top guide shaft 1 excavates the pilot hole 5, and the excavator 2 guides the pilot hole 5. The arch shell 3a is excavated. (See FIG. 2) Next, the shell concrete 3b is poured in the top pit 1 to integrate the left and right arch shell portions 3a, and the arch shell 3 is constructed in front of the tunnel excavation face. (See FIG. 5) Next, the tunnel main body 6 is constructed in the arch shell 3, but since the construction of the tunnel main body 6 is an excavation work in the rigid arch shell 3, the tunnel with an ultra-large cross section can be safely and promptly. It is something to be dug up. (See FIG. 6) Then, the excavator 2 is disassembled and removed, and the top pit 1 is backfilled. (Refer to FIG. 7) In the figure, 7 is backfill soil.
【０００７】[0007]
【発明の効果】本発明によれば前記したように、トンネ
ル断面外の頂設導坑を作業坑として円弧状地下連続壁掘
削機により先受工としてのアーチシエルを施工すること
によって、トンネル掘削とは独立、先行したアーチシエ
ルの連続構築作業が可能となる。According to the present invention, as described above, tunnel arch excavation is carried out by constructing an arch shell as a preparatory work by an arcuate underground continuous wall excavator using the top pit outside the tunnel cross section as a working pit. Independent of and, it will be possible to perform the continuous construction work of the Archier that preceded it.
【０００８】また本発明によればトンネル本体の施工は
剛強なアーチシエル内での掘削作業となるので、超大断
面トンネルでも安全、且つ急速な掘進が可能となる。Further, according to the present invention, since the construction of the tunnel main body is an excavation work in a rigid arch shell, safe and rapid excavation is possible even in an ultra-large section tunnel.
【図１】本発明に係るトンネル先受工におけるアーチシ
エルの構築方法の一実施例の実施状況を示す横断面図で
ある。FIG. 1 is a cross-sectional view showing an embodiment of a method for constructing an arch shell in tunnel precedent receiving according to the present invention.
【図２】図１の縦断面図である。FIG. 2 is a longitudinal sectional view of FIG.
【図３】頂壁導坑の掘進工程を示す横断面図である。FIG. 3 is a cross-sectional view showing a step of excavating a top wall tunnel.
【図４】円弧状地下連続壁掘削機によるアーチシエル部
の構築工程を示す横断面図である。FIG. 4 is a transverse cross-sectional view showing a process for constructing an arch shell part by an arcuate underground continuous wall excavator.
【図５】左右のアーチシエル部の結合工程を示す横断面
図である。FIG. 5 is a transverse cross-sectional view showing a process of connecting left and right arch shells.
【図６】アーチシエル内におけるトンネル施工工程を示
す横断面図である。FIG. 6 is a cross-sectional view showing a tunnel construction process in the arch shell.
【図７】円弧状地下連続壁掘削機の解体撤去及び頂設導
坑の埋戻し工程を示す横断面図である。FIG. 7 is a cross-sectional view showing a dismantling and removing process of the arcuate underground continuous wall excavator and a backfilling process of the top tunnel.
１ 頂設導坑 ２ 円弧状地下連続壁掘削機 ２ａ カツター部 ２ｂ 円弧状ロツド ３ アーチシエル ３ａ アーチシエル部 ３ｂ シエルコンクリート ６ トンネル本体 1 Top guide shaft 2 Arc-shaped underground continuous wall excavator 2a Cutter part 2b Arc-shaped rod 3 Arch shell 3a Arch shell 3b Shell concrete 6 Tunnel body
Claims (1)
円弧状地下連続壁掘削機によって左右のアーチシエル部
を構築し、前記頂設導坑内にコンクリートを打設して前
記左右のアーチシエル部を結合し、トンネル掘削切羽前
方にアーチシエルを構築することを特徴とするトンネル
先受工におけるアーチシエルの構築方法。1. A top guide shaft is excavated in advance, left and right arch shells are constructed from the top guide shaft by an arcuate underground continuous wall excavator, and concrete is placed in the top guide shaft. A method for constructing an arch shell in tunnel pre-construction, characterized in that the left and right arch shells are joined together to construct an arch shell in front of a tunnel excavation face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3175234A JP2551506B2 (en) | 1991-07-16 | 1991-07-16 | Construction method of arch shell in tunnel precedent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3175234A JP2551506B2 (en) | 1991-07-16 | 1991-07-16 | Construction method of arch shell in tunnel precedent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0518194A JPH0518194A (en) | 1993-01-26 |
| JP2551506B2 true JP2551506B2 (en) | 1996-11-06 |
Family
ID=15992612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3175234A Expired - Lifetime JP2551506B2 (en) | 1991-07-16 | 1991-07-16 | Construction method of arch shell in tunnel precedent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2551506B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3824114B2 (en) * | 1997-11-28 | 2006-09-20 | 島田 巌乃 | Whale bone method for large section tunnel |
| US6520718B1 (en) | 1998-11-27 | 2003-02-18 | Shigeki Nagatomo, Et Al. | Sardine-bone construction method for large-section tunnel |
-
1991
- 1991-07-16 JP JP3175234A patent/JP2551506B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0518194A (en) | 1993-01-26 |
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