JP2001214699A - Construction method of large cross sectional tunnel - Google Patents
Construction method of large cross sectional tunnelInfo
- Publication number
- JP2001214699A JP2001214699A JP2000027673A JP2000027673A JP2001214699A JP 2001214699 A JP2001214699 A JP 2001214699A JP 2000027673 A JP2000027673 A JP 2000027673A JP 2000027673 A JP2000027673 A JP 2000027673A JP 2001214699 A JP2001214699 A JP 2001214699A
- Authority
- JP
- Japan
- Prior art keywords
- tunnel
- small
- section tunnel
- section
- cross sectional
- 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
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主として道路や鉄
道などの下を横断する大断面トンネルの構築に用いられ
る大断面トンネルの構築方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a large section tunnel used mainly for constructing a large section tunnel crossing a road, a railway or the like.
【０００２】[0002]
【従来の技術】従来のこの種の大断面トンネルの構築方
法としては、大断面トンネルの掘削領域外周に係る部位
に箱体をセクションを噛ませながら列状に挿入して先受
防護としての門形ルーフを形成すると共に、該門形ルー
フの内側において大断面の函体（プレキャストコンクリ
ート製）を掘削しながら推進させることにより大断面ト
ンネルを構築するという箱形ルーフ工法がある。2. Description of the Related Art As a conventional method of constructing a tunnel having a large cross section of this type, a box is inserted in a row at a position corresponding to the outer periphery of an excavation area of the large cross section tunnel while biting a section. There is a box-type roof construction method in which a large-sized tunnel is constructed by forming a shaped roof and propelling while excavating a large-section box (made of precast concrete) inside the gate-shaped roof.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、かかる
箱形ルーフ工法では、大断面の函体を取り扱うことか
ら、本来的に広いスペースを必要とし、加えて、大断面
の函体を推進させるための大型の推進設備も必要とす
る。そして、それ故に、狭隘な現場における本工法の適
用は事実上かなり困難である。However, such a box-type roof construction method requires a large space because it handles a large-sized box, and in addition, it requires a large-sized box to be propelled. It also requires large propulsion equipment. And, therefore, the application of this method in a narrow site is practically very difficult.
【０００４】そこで、かかる不都合を解消する大断面ト
ンネルの構築方法としては、小断面シールドにより、矩
形大断面トンネルの外側に沿って割り付けられる複数の
小断面シールドトンネルを地中に並設して外殻部を構成
すると共に、該外殻部の内部をシールド工法によらずに
掘削して矩形大断面トンネルを構築するという外殻部先
行型シールド工法がある。Therefore, as a method of constructing a large-section tunnel which solves such inconvenience, a plurality of small-section shield tunnels which are allocated along the outside of a rectangular large-section tunnel by a small-section shield are arranged side by side in the ground. There is an outer shell leading shield method in which a shell is formed, and the inside of the outer shell is excavated without using a shield method to construct a rectangular large-section tunnel.
【０００５】しかしながら、かかる外殻部先行型シール
ド工法では、シールドの構造上、テール部でクリアラン
スをとりながら複数の小断面シールドトンネルが並設さ
れていくので、各小断面シールドトンネルの間に不可避
的に隙間領域ができる不都合があった。[0005] However, in such an outer shell type shield type shield method, a plurality of small section shield tunnels are arranged side by side with a clearance at the tail portion due to the structure of the shield. There was a disadvantage that a gap region was formed in the end.
【０００６】即ち、かかる隙間領域ができた状態では、
矩形大断面トンネルの外殻部が一体の構造とならない。
このため、かかる隙間領域を掘削し、鉄筋を組み立て、
コンクリートの打設を行うことにより、矩形大断面トン
ネルの外殻部を一体化する煩雑で時間のかかる作業を強
いられていたのである。That is, in a state where such a gap region is formed,
The outer shell of the rectangular large-section tunnel does not have an integral structure.
For this reason, excavating such clearance areas, assembling rebar,
The casting of concrete forced a complicated and time-consuming task of integrating the outer shell of the rectangular large-section tunnel.
【０００７】そこで、本発明の目的は、狭隘な現場にお
いても、大断面トンネルの構築が効率的に実施できる、
大断面トンネルの構築方法、小断面トンネルの案内構
造、及び推進機を提供することにある。Therefore, an object of the present invention is to construct a large-section tunnel efficiently even in a narrow site.
An object of the present invention is to provide a method for constructing a large-section tunnel, a guide structure for a small-section tunnel, and a propulsion device.
【０００８】[0008]
【課題を解決するための手段】前記目的を達成するため
に、第一発明に係る大断面トンネルの構築方法は、推進
機により、構築されるべき大断面トンネルの断面領域に
おいて割り付けられる一番目の小断面トンネルを設置す
る一番目設置工程と、推進機により、前記一番目設置工
程及びこの二番目設置工程で設置された小断面トンネル
に、前記大断面トンネルの断面領域において割り付けら
れる二番目以後の小断面トンネルを、添設する二番目添
設工程と、前記一番目設置工程及び前記二番目添設工程
で設置された小断面トンネルのうち前記大断面トンネル
の構造に係る部分同士を相互に接合することにより一体
化する部分一体化工程と、前記部分一体化工程の後に、
前記小断面トンネルのうち前記大断面トンネルの構造に
係らない部分を撤去する部分撤去工程と、を含むを特徴
としている。In order to achieve the above object, a method for constructing a large-section tunnel according to the first aspect of the present invention is directed to a method for constructing a large-section tunnel by a propulsion device. A first installation step of installing a small-section tunnel, and a second or later allocated to the small-section tunnel installed in the first installation step and the second installation step in the cross-sectional area of the large-section tunnel by a propulsion device. A second attaching step of attaching a small-section tunnel, and joining the portions related to the structure of the large-section tunnel among the small-section tunnels installed in the first installing step and the second attaching step to each other. After the partial integration step and the partial integration step,
Removing a portion of the small-section tunnel that is not related to the structure of the large-section tunnel.
【０００９】従って、この第一発明に係る方法によれ
ば、推進機で大断面トンネルに割り付けられる小断面ト
ンネル群を順次設置した上で、該小断面トンネル群のう
ち大断面トンネルの構造部分を一体化し、非構造部分を
撤去することとしたので、狭隘な現場においても、大断
面トンネルの構築が効率的にできることとなる。Therefore, according to the method of the first aspect of the present invention, after the small-section tunnel group assigned to the large-section tunnel by the propulsion device is sequentially installed, the structural section of the large-section tunnel in the small-section tunnel group is changed. Since it is integrated and the non-structural parts are removed, it is possible to efficiently construct a large section tunnel even in a narrow site.
【００１０】また、第二発明に係る小断面トンネルの案
内構造は、推進機で先行して設置される先行小断面トン
ネルの添設に係る外周部にトンネル延長方向で設けられ
る溝又は突条と、推進機で前記先行小断面トンネルに後
行して添設される後行小断面トンネルの添設に係る外周
部にトンネル延長方向で設けられ、前記先行小断面トン
ネルの溝又は突条に対して摺動自在にはまる突条又は溝
とからなり、前記後行小断面トンネルの推進時において
前記先行小断面トンネルに対して該後行小断面トンネル
を案内することを特徴としている。Further, the guide structure for a small-section tunnel according to the second invention is provided with a groove or a ridge provided in the extension direction of the tunnel in the extension of the preceding small-section tunnel attached in advance by the propulsion device. The propulsion unit is provided in the direction of extension of the tunnel in the extension direction of the trailing small-section tunnel attached to the trailing small-section tunnel, which is attached to the trailing small-section tunnel. And a ridge or groove that fits slidably and guides the trailing small-section tunnel to the preceding small-section tunnel when the trailing small-section tunnel is propelled.
【００１１】この第二発明に係る構造によれば、後行小
断面トンネルの推進時において先行小断面トンネルに対
して後行小断面トンネルの案内をすることができる。従
って、先行小断面トンネルに対しての後行小断面トンネ
ルの添設が効率的にできる。その結果、狭隘な現場にお
ける大断面トンネルの構築がより効率的にできることと
なる。According to the structure of the second aspect of the present invention, when the following small-section tunnel is propelled, the preceding small-section tunnel can be guided to the subsequent small-section tunnel. Therefore, it is possible to efficiently attach the following small-section tunnel to the preceding small-section tunnel. As a result, it is possible to more efficiently construct a large-section tunnel in a narrow site.
【００１２】更に、第三発明に係る推進機は、先行して
設置される先行小断面トンネルの添設に係る外周部にト
ンネル延長方向で設けられる溝又は突条に対して摺動自
在にはまる突条又は溝を添設に係る外周部にトンネル延
長方向で設けられることを特徴としている。Further, the propulsion device according to the third aspect of the present invention is slidably fitted into a groove or a ridge provided in the extension direction of the tunnel in the extension direction of the tunnel with the preceding small cross section installed in advance. It is characterized in that a ridge or a groove is provided on an outer peripheral portion relating to the attachment in the tunnel extending direction.
【００１３】この第三発明に係る推進機によれば、後行
小断面トンネルの推進時において先行小断面トンネルに
対して該後行小断面トンネルと一体となって推進する推
進機の案内をすることができる。従って、先行小断面ト
ンネルに対しての後行小断面トンネルの添設が効率的に
できる。その結果、狭隘な現場における大断面トンネル
の構築がより効率的にできることとなる。According to the thruster according to the third aspect of the present invention, when the following small-section tunnel is propelled, the propulsion apparatus to be propelled integrally with the following small-section tunnel is guided to the preceding small-section tunnel. be able to. Therefore, it is possible to efficiently attach the following small-section tunnel to the preceding small-section tunnel. As a result, it is possible to more efficiently construct a large-section tunnel in a narrow site.
【００１４】[0014]
【発明の実施の形態】以下、添付図面に示す実施の形態
に基づいて本発明を詳細に説明する。図１は本発明の一
実施の形態が適用された小断面トンネル及び推進機の概
略構成を示す横断面図（図１（ａ）は小断面トンネル、
図１（ｂ）は推進機）、である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings. FIG. 1 is a cross-sectional view showing a schematic configuration of a small-section tunnel and a propulsion device to which an embodiment of the present invention is applied (FIG. 1A is a small-section tunnel,
FIG. 1B shows a propulsion device.
【００１５】本実施の形態が適用された小断面トンネル
１は、図１（ａ）及び図２に示すように、構築されるべ
き大断面トンネル２の断面領域において割り付けられる
ものであり、具体的には、推進管１１をトンネル延長方
向で連結してなるものである。The small-section tunnel 1 to which the present embodiment is applied is, as shown in FIGS. 1A and 2, allocated in the section area of the large-section tunnel 2 to be constructed. Has a propulsion pipe 11 connected in a tunnel extending direction.
【００１６】本実施の形態では、推進管１１は、大断面
トンネル２の構造に係る部分に割り当てられた鉄筋コン
クリート構造である本設材１１ａと、大断面トンネル２
の構造に係らない部分に割り当てられた鋼構造である仮
設材１１ｂとから構成されている。In the present embodiment, the propulsion pipe 11 includes a main installation material 11a, which is a reinforced concrete structure assigned to a portion related to the structure of the large-section tunnel 2, and a large-section tunnel 2
And a temporary material 11b which is a steel structure allocated to a portion irrespective of the structure.
【００１７】ここで、本設材１１ａの厚さ寸法は、大断
面トンネル２の構造に係る部分として必要とされる、即
ち、大断面トンネル２に加わる土圧に耐えるのに必要と
される、大きさに設定されている。Here, the thickness of the main member 11a is required as a portion related to the structure of the large-section tunnel 2, that is, required to withstand the earth pressure applied to the large-section tunnel 2. The size is set.
【００１８】これに対し、仮設材１１ｂの厚さ寸法は、
大断面トンネル２の断面領域において割り付けられる一
の小断面トンネル１に加わる土圧に耐えるのに必要とさ
れる、大きさに設定されている。On the other hand, the thickness of the temporary material 11b is
It is set to a size required to withstand the earth pressure applied to one small-section tunnel 1 allocated in the cross-sectional area of the large-section tunnel 2.
【００１９】従って、仮設材１１ｂの厚さ寸法は、本設
材１１ａの厚さ寸法に比してかなり薄くなっており、経
済的に無駄が生じないようになっている。Accordingly, the thickness of the temporary material 11b is considerably smaller than the thickness of the main material 11a, so that waste is not produced economically.
【００２０】また、本設材１１ａには、大断面トンネル
２の構造に係る部分、即ち、本設材１１ａ相互の接合を
可能にするボルトボックス１２、及びＰＣ鋼線の挿通が
自在である穴１３が設けられている。Further, the main installation material 11a has a portion related to the structure of the large-section tunnel 2, that is, a bolt box 12 for enabling the mutual connection of the main installation material 11a, and a hole through which a PC steel wire can be freely inserted. 13 are provided.
【００２１】更に、仮設材１１ｂには、後行小断面トン
ネルである二番目の小断面トンネル１ｂの推進時におい
て先行小断面トンネルである一番目の小断面トンネル１
ａに対して二番目の小断面トンネル１ｂを案内する役割
を果たす小断面トンネルの案内構造２１が設けられてい
る。Further, the temporary material 11b has a first small-section tunnel 1 which is a preceding small-section tunnel when the second small-section tunnel 1b which is a subsequent small-section tunnel is propelled.
The guide structure 21 of the small section tunnel which plays the role of guiding the second small section tunnel 1b with respect to a is provided.
【００２２】即ち、小断面トンネルの案内構造２１は、
図１（ａ）に示すように、推進機３で先行して設置され
る一番目の小断面トンネル１ａの添設に係る外周部にト
ンネル延長方向で設けられる溝２１ａと、推進機３で一
番目の小断面トンネル１ａに後行して添設される二番目
の小断面トンネル１ｂの添設に係る外周部にトンネル延
長方向で設けられ、一番目の小断面トンネル１ａの溝２
１ａに対して摺動自在にはまる突条２１ｂとから構成さ
れている。That is, the guide structure 21 of the small-section tunnel is
As shown in FIG. 1 (a), a groove 21a provided in the extension direction of the tunnel in the extension direction of the first small-section tunnel 1a provided in advance by the propulsion device 3 is attached to the propulsion device 3. A second small-section tunnel 1b, which is provided after the second small-section tunnel 1a, is provided in the extension direction of the tunnel associated with the attachment of the second small-section tunnel 1b, and the groove 2 of the first small-section tunnel 1a is provided.
1a, and a ridge 21b that fits slidably with respect to 1a.
【００２３】そして、推進機３にも、図１（ｂ）に示す
ように、先行して設置される一番目の小断面トンネル１
ａの添設に係る外周部にトンネル延長方向で設けられる
溝２１ａに対して摺動自在にはまる突条２２が添設に係
る外周部にトンネル延長方向で設けられている。尚、こ
の突条２２は、推進機３に対して着脱が自在であり、何
番目の小断面トンネル１を添設するかで側部や下部に任
意に取り付けられるようになっている。As shown in FIG. 1B, the propulsion unit 3 also has a first small-section tunnel 1 installed in advance.
A protruding ridge 22 is provided in the outer peripheral portion according to the extension in the tunnel extending direction so as to be slidable with respect to the groove 21a provided in the outer peripheral portion according to the extension in the tunnel extension direction. The ridges 22 can be freely attached to and detached from the propulsion unit 3, and can be arbitrarily attached to the side or lower part depending on the number of the small-section tunnel 1 to be attached.
【００２４】この突条２２の働きにより、推進機３は、
二番目の小断面トンネル１ｂの推進時において一番目の
小断面トンネル１ａに従って案内されることとなる。By the function of the ridge 22, the propulsion unit 3
During the propulsion of the second small section tunnel 1b, it is guided according to the first small section tunnel 1a.
【００２５】尚、本実施の形態における仮設材１１ｂ
は、図示しないが、撤去や再利用をし易くするため、ボ
ルトにより組みばらしが自在である分割構成となってい
る。The temporary material 11b in the present embodiment
Although not shown in the figure, it has a divided configuration that can be easily assembled with bolts to facilitate removal and reuse.
【００２６】次に、図２及び図３、場合により図１を用
いて、本実施の形態に係る大断面トンネルの構築方法に
ついて説明する。尚、この大断面トンネルの構築方法
は、一番目設置工程と、二番目添設工程と、部分一体化
工程と、部分撤去工程とから構成されている。Next, a method of constructing a large-section tunnel according to this embodiment will be described with reference to FIGS. The method of constructing the large-section tunnel includes a first installation step, a second attachment step, a partial integration step, and a partial removal step.
【００２７】（１）一番目設置工程（図２（ａ）参照） まず、推進機３により、構築されるべき大断面トンネル
２の断面領域において割り付けられる一番目の小断面ト
ンネル１ａを設置する一番目設置工程が行われる。(1) First Installation Step (See FIG. 2 (a)) First, the first small section tunnel 1a allocated by the propulsion unit 3 in the section area of the large section tunnel 2 to be constructed is installed. A third installation step is performed.
【００２８】この一番目設置工程では、小断面トンネル
１故、用いられる推進管１１が短尺であるため、地山へ
の推進管１１の挿入を行うのに必要なスペースが狭くて
足り、また、小断面で比較的軽量の推進管１１を推進さ
せればよいため、推進設備も小規模のもので足りる。In this first installation step, since the propulsion pipe 11 used is short because of the small-section tunnel 1, the space required for inserting the propulsion pipe 11 into the ground is small. Since a relatively lightweight propulsion pipe 11 having a small cross section may be propelled, a small propulsion facility is sufficient.
【００２９】また、この一番目設置工程では、小断面ト
ンネル１という極めて限られた範囲を掘進するに過ぎな
いため、箱形ルーフ工法等の補助工法を別に実施しなく
ても、上部交通の安全性は十分に確保されることとな
る。In the first installation step, since only a very limited area such as the small-section tunnel 1 is excavated, the safety of the upper traffic can be maintained without separately implementing an auxiliary construction method such as a box-shaped roof construction method. Sex will be sufficiently secured.
【００３０】（２）二番目添設工程（図２（ｂ）、図２
（ｃ）参照） 次に、推進機３により、一番目設置工程及びこの二番目
設置工程で設置された小断面トンネルに、大断面トンネ
ル２の断面領域において割り付けられる二番目以後の小
断面トンネル１を、添設する二番目添設工程が行われ
る。(2) Second adding step (FIG. 2B, FIG.
(See (c).) Next, the propulsion unit 3 allocates the second and subsequent small-section tunnels 1 allocated in the cross-sectional area of the large-section tunnel 2 to the small-section tunnels installed in the first installation step and the second installation step. Is performed in a second attaching step.
【００３１】即ち、まず、一番目の小断面トンネル１ａ
に対して、二番目の小断面トンネル１ｂが添設され、次
いで一番目の小断面トンネル１ａに対して、三番目の小
断面トンネル１ｃが添設され、以下、六番目の小断面ト
ンネル１ｆの添設が完了するまでこの二番目添設工程が
行われることとなる。That is, first, the first small-section tunnel 1a
, A second small-section tunnel 1b is added, and then a third small-section tunnel 1c is added to the first small-section tunnel 1a. This second adding step is performed until the adding is completed.
【００３２】この二番目添設工程では、上記一番目設置
工程におけるものと同様の効果が得られる他、小断面ト
ンネルの案内構造２１、及び推進機３に設けられた突条
２２の働きにより、後行小断面トンネル１の推進時にお
いて先行小断面トンネル１に対して後行小断面トンネル
１を案内することができ、その結果、先行小断面トンネ
ル１に対しての後行小断面トンネル１の添設が効率的に
できることとなる。In the second attachment step, the same effects as those in the first installation step can be obtained, and in addition, the guide structure 21 of the small-section tunnel and the ridges 22 provided on the propulsion unit 3 allow the second attachment step to operate. During the propulsion of the following small section tunnel 1, the following small section tunnel 1 can be guided with respect to the preceding small section tunnel 1, and as a result, the following small section tunnel 1 can be guided with respect to the preceding small section tunnel 1. The attachment can be performed efficiently.
【００３３】（３）部分一体化工程（図３（ａ）参照） 続いて、一番目設置工程及び二番目添設工程で設置され
た小断面トンネル１のうち大断面トンネル２の構造に係
る部分同士を相互に接合することにより一体化する部分
一体化工程が行われる。(3) Partial integration step (see FIG. 3 (a)) Subsequently, a part of the small section tunnel 1 installed in the first installation step and the second attachment step, which is related to the structure of the large section tunnel 2 A partial integration process is performed in which the components are integrated by joining each other.
【００３４】即ち、ボルトボックス１２においては、ボ
ルトによる締結により、穴１３においては、ＰＣ鋼線を
挿通、緊張させて両端部を定着する所謂圧着により、本
設材１１ａ同士を相互に接合することにより一体化す
る。That is, in the bolt box 12, the permanent members 11 a are joined to each other by so-called crimping in which the PC steel wire is inserted and tightened to fix both ends in the hole 13 by fastening with bolts. To be integrated.
【００３５】この部分一体化工程では、ボルトによる締
結のみならず、ＰＣ鋼線による圧着をも併用して本設材
１１ａ相互の接合をすることとしたので、より強靱で永
続性のある接合構造が得られることとなる。In this partial integration step, not only fastening by bolts but also crimping by PC steel wires are used together to join the main members 11a to each other, so that a more tough and permanent joining structure is provided. Is obtained.
【００３６】（４）部分撤去工程（図３（ｂ）、図３
（ｃ）参照） そして、部分一体化工程の後に、小断面トンネル１のう
ち大断面トンネル２の構造に係らない部分を撤去する部
分撤去工程が行われる。(4) Partial removal step (FIG. 3B, FIG.
(Refer to (c).) After the partial integration step, a partial removal step of removing a part of the small-section tunnel 1 that is not related to the structure of the large-section tunnel 2 is performed.
【００３７】即ち、この部分撤去工程では、ボルトによ
る締結をばらして仮設材１１ｂの分割をし、これを撤去
する。That is, in this partial removal step, the temporary material 11b is divided by loosening the bolts, and the temporary material 11b is removed.
【００３８】このとき、まず、三番目の小断面トンネル
１ｃに係る推進管１１の仮設材１１ｂと、四番目の小断
面トンネル１ｄに係る推進管１１の仮設材１１ｂとから
撤去し、本設構造物である柱２３を構築した上で、一番
目の小断面トンネル１ａ、二番目の小断面トンネル１
ｂ、五番目の小断面トンネル１ｅ及び六番目の小断面ト
ンネル１ｆに係る推進管１１の仮設材１１ｂを撤去す
る。そして、全ての仮設材１１ｂを撤去すれば部分撤去
工程が終了する。At this time, first, the temporary material 11b of the propulsion pipe 11 related to the third small-section tunnel 1c and the temporary material 11b of the propulsion pipe 11 related to the fourth small-section tunnel 1d are removed, and the main structure is removed. The first small section tunnel 1a, the second small section tunnel 1
b, The temporary material 11b of the propulsion pipe 11 relating to the fifth small section tunnel 1e and the sixth small section tunnel 1f is removed. Then, if all the temporary materials 11b are removed, the partial removal process is completed.
【００３９】従って、本実施の形態に係る方法によれ
ば、推進機３で大断面トンネル２に割り付けられる小断
面トンネル１を順次設置した上で、小断面トンネル１の
うち大断面トンネル２の構造部分である本設材１１ａを
一体化し、非構造部分である仮設材１１ｂを撤去するこ
ととしたので、狭隘な現場においても、大断面トンネル
２の構築が効率的にできることとなる。Therefore, according to the method according to the present embodiment, after the small-section tunnels 1 allocated to the large-section tunnels 2 are sequentially installed by the propulsion unit 3, the structure of the large-section tunnel 2 of the small-section tunnels 1 is set. Since the main material 11a as a part is integrated and the temporary material 11b as a non-structural part is removed, the construction of the large-section tunnel 2 can be efficiently performed even in a narrow site.
【００４０】尚、本実施の形態に係る方法を推進機では
なくシールドを用いて実施する方法も想定されるが、か
かるシールドを用いた方法では、本実施の形態に係る方
法と異なり、大断面トンネルの構築が効率的にできると
いう効果を当然には享受できない。It is to be noted that a method in which the method according to the present embodiment is performed using a shield instead of a propulsion device is also envisaged. However, in the method using such a shield, unlike the method according to the present embodiment, a large cross section is used. Naturally, the effect of efficiently constructing a tunnel cannot be enjoyed.
【００４１】その理由は、シールドを用いて小断面シー
ルドトンネルを並設しようとしても、テール部の内側と
セグメントの外側との間でクリアランスを必要とするシ
ールドの構造上、互いに並設される小断面シールドトン
ネルの間に隙間領域が必ずできてしまうので、大断面ト
ンネルの外郭部を一体化するには、どうしても該隙間領
域を構造物化する煩雑作業を強いられる結果となるから
である。The reason is that, even if the shield tunnels are used to arrange small-section shield tunnels side by side, small shields that are arranged side by side due to the structure of the shield that requires clearance between the inside of the tail portion and the outside of the segment. This is because a gap region is always formed between the cross-section shield tunnels, so that integrating the outer portion of the large-section tunnel results in a complicated operation of constructing the gap region into a structure.
【００４２】[0042]
【発明の効果】本発明に係る大断面トンネルの構築方
法、小断面トンネルの案内構造、及び推進機によれば、
以上のように構成したため、狭隘な現場においても、効
率的に大断面トンネルの構築を実施できることとなる。According to the method for constructing a large-section tunnel, the guide structure for a small-section tunnel, and the propulsion device according to the present invention,
With the above configuration, a large-section tunnel can be efficiently constructed even in a narrow site.
【図１】本発明の一実施の形態が適用された小断面トン
ネル及び推進機の概略構成を示す横断面図（図１（ａ）
は小断面トンネル、図１（ｂ）は推進機）である。FIG. 1 is a cross-sectional view showing a schematic configuration of a small-section tunnel and a propulsion device to which an embodiment of the present invention is applied (FIG. 1A)
Is a small section tunnel, and FIG. 1 (b) is a propulsion device.
【図２】本発明の一実施の形態に係る大断面トンネルの
構築方法を説明する横断面図である。FIG. 2 is a cross-sectional view illustrating a method for constructing a large-section tunnel according to an embodiment of the present invention.
【図３】本発明の一実施の形態に係る大断面トンネルの
構築方法を説明する横断面図である。FIG. 3 is a cross-sectional view illustrating a method for constructing a large-section tunnel according to an embodiment of the present invention.
１…小断面トンネル １ａ…一番目の小断面トンネル １ｂ…二番目の小断面トンネル １ｃ…三番目の小断面トンネル １ｄ…四番目の小断面トンネル １ｅ…五番目の小断面トンネル １ｆ…六番目の小断面トンネル ２…大断面トンネル ３…推進機 １１…推進管 １１ａ…本設材 １１ｂ…仮設材 １２…ボルトボックス １３…穴 ２１…小断面トンネルの案内構造 ２１ａ…溝 ２１ｂ…突条 ２２…突条 ２３…柱 1 small tunnel 1a first small tunnel 1b second small tunnel 1c third small tunnel 1d fourth small tunnel 1e fifth small tunnel 1f sixth Small section tunnel 2 Large section tunnel 3 Propulsion device 11 Propulsion pipe 11a Main material 11b Temporary material 12 Bolt box 13 Hole 21 Small section tunnel guide structure 21a Groove 21b Projection 22 Projection Article 23: Pillar
Claims (3)
ンネルの断面領域において割り付けられる一番目の小断
面トンネルを設置する一番目設置工程と、 推進機により、前記一番目設置工程及びこの二番目設置
工程で設置された小断面トンネルに、前記大断面トンネ
ルの断面領域において割り付けられる二番目以後の小断
面トンネルを、添設する二番目添設工程と、 前記一番目設置工程及び前記二番目添設工程で設置され
た小断面トンネルのうち前記大断面トンネルの構造に係
る部分同士を相互に接合することにより一体化する部分
一体化工程と、 前記部分一体化工程の後に、前記小断面トンネルのうち
前記大断面トンネルの構造に係らない部分を撤去する部
分撤去工程と、を含むことを特徴とする、大断面トンネ
ルの構築方法。1. A first installation step of installing a first small section tunnel allocated in a sectional area of a large section tunnel to be constructed by a propulsion unit, and the first installation step and the second step of the second installation step by a propulsion unit. A second attaching step of attaching the second and subsequent small-section tunnels allocated in the sectional area of the large-section tunnel to the small-section tunnel installed in the installing step; and the first installing step and the second adding step. A partial integration step of joining together portions of the large-section tunnel of the small-section tunnel installed in the installation step by joining together, and after the partial integration step, A part removing step of removing a part irrelevant to the structure of the large section tunnel.
トンネルの添設に係る外周部にトンネル延長方向で設け
られる溝又は突条と、 推進機で前記先行小断面トンネルに後行して添設される
後行小断面トンネルの添設に係る外周部にトンネル延長
方向で設けられ、前記先行小断面トンネルの溝又は突条
に対して摺動自在にはまる突条又は溝とからなり、 前記後行小断面トンネルの推進時において前記先行小断
面トンネルに対して該後行小断面トンネルを案内するこ
とを特徴とする、小断面トンネルの案内構造。2. A groove or a ridge provided in the extension direction of the tunnel in the direction of extension of the tunnel with the preceding small section tunnel installed in advance by the propulsion machine, and the propulsion machine follows the preceding small section tunnel. A protruding ridge or groove provided in the extension direction of the tunnel attached to the trailing small-section tunnel to be attached in the direction of extension of the tunnel and slidably fitted to the groove or ridge of the preceding small-section tunnel. The guide structure for a small-section tunnel, wherein the trailing small-section tunnel is guided with respect to the preceding small-section tunnel when the subsequent small-section tunnel is propelled.
の添設に係る外周部にトンネル延長方向で設けられる溝
又は突条に対して摺動自在にはまる突条又は溝を添設に
係る外周部にトンネル延長方向で設けられることを特徴
とする、推進機。3. A ridge or a groove which is slidably fitted to a groove or a ridge provided in an extension direction of the tunnel on an outer peripheral portion of a small tunnel having a small cross section installed in advance. A propulsion device, which is provided on an outer peripheral portion in a tunnel extending direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000027673A JP3762603B2 (en) | 2000-02-04 | 2000-02-04 | Construction method of large section tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000027673A JP3762603B2 (en) | 2000-02-04 | 2000-02-04 | Construction method of large section tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001214699A true JP2001214699A (en) | 2001-08-10 |
| JP3762603B2 JP3762603B2 (en) | 2006-04-05 |
Family
ID=18553214
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000027673A Expired - Lifetime JP3762603B2 (en) | 2000-02-04 | 2000-02-04 | Construction method of large section tunnel |
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| Country | Link |
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| JP (1) | JP3762603B2 (en) |
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