JPH0794795B2 - Wall for lining - Google Patents
Wall for liningInfo
- Publication number
- JPH0794795B2 JPH0794795B2 JP1034450A JP3445089A JPH0794795B2 JP H0794795 B2 JPH0794795 B2 JP H0794795B2 JP 1034450 A JP1034450 A JP 1034450A JP 3445089 A JP3445089 A JP 3445089A JP H0794795 B2 JPH0794795 B2 JP H0794795B2
- Authority
- JP
- Japan
- Prior art keywords
- lining
- excavation hole
- tunnel
- main
- wall body
- 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
- Lining And Supports For Tunnels (AREA)
Description
【発明の詳細な説明】 「産業上の利用分野」 この発明は、複数の掘削断面が重複部分をもって接合さ
れた断面形状、すなわち複断面を有するトンネルを覆工
するための覆工用壁体に関するものである。TECHNICAL FIELD The present invention relates to a lining wall body for lining a tunnel having a cross-sectional shape in which a plurality of excavated cross sections are joined with overlapping portions, that is, a double cross section. It is a thing.
「従来の技術」 地中にトンネルを形成する場合、例えば鉄道トンネルの
場合の駅部や自動車トンネルの場合の合流部のように、
通常の掘削断面に対して一部を拡幅した断面を形成する
必要に迫られることがある。このため、通常の掘削断面
で形成したトンネルを基地として、このトンネルからシ
ールド機や掘削機を用いて拡幅部を形成することが行わ
れている。このように、複数の掘削断面を有する拡幅部
においては、これら掘削断面の重複部（接合部）におい
て構造上耐力が不足となるおそれもあるので、トンネル
の一部のみを欠落させて拡幅部を形成することは行われ
ず、新たにこの部分において大断面のトンネルを掘削形
成することが従来行われている。"Prior art" When forming a tunnel in the ground, for example, in the case of a railway tunnel or at the junction of a car tunnel,
There is a case where it is necessary to form a partially widened cross section with respect to a normal excavation cross section. For this reason, a widening portion is formed from a tunnel formed by a normal excavation cross section as a base, using a shield machine or an excavator from this tunnel. As described above, in the widened portion having a plurality of excavated cross sections, the structural proof stress may be insufficient at the overlapping portion (joint portion) of these excavated cross sections, so that only a part of the tunnel is cut off to increase the widened portion. It is not formed, but it is conventionally performed to newly excavate a large cross section tunnel in this portion.
「発明が解決しようとする課題」 しかしながら、前記従来の如く新たに大断面のトンネル
を掘削形成することは、多大の工期と工費を要する結果
となり、その適用範囲に限界があった。また、通常、拡
幅部を必要とする箇所は、前述の鉄道の駅部や道路の合
流部の如く、その高さについては拡大する必要のない箇
所であり、大断面のトンネルを掘削形成することで、不
要な部分までトンネルを掘削形成せねばならず、非能率
的かつ無駄であった。[Problems to be Solved by the Invention] However, excavating and forming a new tunnel having a large cross section as described above requires a great deal of construction period and cost, and its application range is limited. In addition, the place where the widened portion is usually required is a place where the height does not need to be enlarged, such as the above-mentioned railway station and the confluence of roads. Therefore, it was inefficient and wasteful to excavate and form tunnels to unnecessary parts.
「課題を解決するための手段」 そこでこの発明は、本掘削穴を形成した後に、該本掘削
穴の側部の覆工用壁体を一部取外し、該本掘削穴の側部
に重複部分を有する拡大掘削穴を形成してなる掘削穴の
うち、前記本掘削穴側の重複部分上下にそれぞれ配置さ
れ、この掘削穴の覆工に用いられる覆工用壁体を、その
内面の少なくとも一部が内方に突出する膨出部に形成す
ると共に、この膨出部には覆工用壁体が本掘削穴に配置
された状態で相対向する平行面をなす平坦面が形成さ
れ、かつ、前記覆工用壁体の外面には、前記拡大掘削穴
の形成時にシールド機を案内するガイドレールが掘削穴
の長手方向に沿って設けることで、前記課題を解決して
いる。"Means for Solving the Problem" Therefore, according to the present invention, after forming a main excavation hole, a part of a lining wall body on a side portion of the main excavation hole is removed, and an overlapping portion is formed on a side portion of the main excavation hole. Among the excavation holes formed by forming the enlarged excavation hole having the above, the lining wall body, which is respectively arranged above and below the overlapping portion on the main excavation hole side and used for lining the excavation hole, has at least one of the inner surfaces thereof. Part is formed in a bulging part that protrudes inward, and in this bulging part, flat surfaces forming parallel surfaces facing each other in a state where the wall material for lining is arranged in the main excavation hole are formed, and The above problem is solved by providing a guide rail on the outer surface of the lining wall body along the longitudinal direction of the excavation hole for guiding the shield machine when the enlarged excavation hole is formed.
この際、拡大掘削穴覆工用の壁体との接合手段を覆工用
壁体に設けておくことが望ましい。At this time, it is desirable to provide a joining means with the wall body for lining the enlarged excavation hole in the wall body for lining.
「作用」 この発明では、本掘削穴を形成した後に、該本掘削穴の
側部の覆工用壁体を一部取外し、該本掘削穴の側部に重
複部分を有する拡大掘削穴を形成してなる掘削穴のう
ち、前記本掘削穴側の重複部分上下にそれぞれ配置さ
れ、この掘削穴の覆工に用いられる覆工用壁体を、その
内面の少なくとも一部を内方に突出する膨出部に形成す
ると共に、この膨出部には覆工用壁体が本掘削穴に配置
された状態で相対向する平行面をなす平坦面を形成した
ので、この平行面間に柱や壁等の補強部材を配設するこ
とで、掘削穴の重複部分を設けたことによる構造上の耐
力低下を防ぐことができる。また、本発明では、前記覆
工用壁体の外面に、前記拡大掘削穴の形成時にシールド
機を案内するガイドレールを掘削穴の長手方向に沿うよ
うに設けたので、拡大掘削穴を形成する際、拡幅部掘削
用のシールド機に、前記ガイドシールに嵌合する部材を
設ければ、シールド機の位置設定及び掘削方向制御が容
易となる。[Operation] In the present invention, after forming the main excavation hole, a part of the lining wall body on the side portion of the main excavation hole is removed to form an enlarged excavation hole having an overlapping portion on the side portion of the main excavation hole. Among the drill holes, the lining wall bodies, which are respectively arranged above and below the overlapping portion on the main drill hole side and used for lining the drill holes, project at least part of their inner surfaces inward. In addition to forming a bulge on the bulge, the lining wall was formed with flat surfaces that are parallel to each other in the state where the lining wall body is placed in the main excavation hole. By disposing the reinforcing member such as the wall, it is possible to prevent the structural yield strength from being reduced due to the provision of the overlapping portion of the excavation hole. Further, in the present invention, since the guide rail for guiding the shield machine at the time of forming the enlarged excavation hole is provided along the longitudinal direction of the excavation hole on the outer surface of the lining wall body, the enlarged excavation hole is formed. At this time, if the shield machine for excavating the widened portion is provided with a member that fits into the guide seal, it becomes easy to set the position of the shield machine and control the excavation direction.
「実施例」 以下、この発明の実施例について図面を参照して説明す
る。[Examples] Examples of the present invention will be described below with reference to the drawings.
第１図ないし第２図は、この発明の一実施例である覆工
用壁体が適用されたトンネルを示す図である。図中、符
号１は拡幅部を有するトンネル（掘削穴）であり、この
トンネル１は、円形の掘削断面を有する本トンネル（本
掘削穴）２と、この本トンネル２の一側方に重複部３を
もって接合され、本トンネル２よりやや小径な円形の掘
削断面を有する拡幅部トンネル（拡大掘削穴）４とから
構成されている。これらトンネル２、４の内壁面は、重
複部分を残して円筒分割体たるセグメント（覆工用壁
体）５、６、…で覆工されている。1 and 2 are views showing a tunnel to which a lining wall body according to an embodiment of the present invention is applied. In the figure, reference numeral 1 is a tunnel (excavation hole) having a widened portion, and the tunnel 1 includes a main tunnel (main excavation hole) 2 having a circular excavation cross section and an overlapping portion on one side of the main tunnel 2. And a widening portion tunnel (expansion drilling hole) 4 having a circular excavation cross section having a diameter slightly smaller than that of the main tunnel 2. The inner wall surfaces of the tunnels 2 and 4 are lined with segments (wall walls for lining) 5, which are cylindrical divided bodies, leaving overlapping portions.
本トンネル２のセグメント５、…のうち、拡幅部トンネ
ル４との重複部３の上下に位置する接合用セグメント5
a、5bには、それぞれ相対向する部分にトンネル２内方
に突出する膨出部7a、7bが形成され、この膨出部7a、7b
の一部は相対向する水平面8a、8bに形成されている。そ
して、この水平面8a、8b間には、所定間隔をおいて柱材
10、10、…が配設されている。また、符号11は、接合用
セグメント5a、5bの外面に設けられ、拡幅部トンネル４
のセグメント６、…との接合に用いられるボルトボック
ス（接合手段）、符号12は、同様に接合用セグメント5
a、5bの外面に設けられ、トンネル１の長手方向に沿っ
て一列に延在するガイドレールである。Of the segments 5, ... Of the main tunnel 2, the joining segments 5 located above and below the overlapping portion 3 with the widening portion tunnel 4
Bulging portions 7a and 7b projecting inward of the tunnel 2 are formed in a and 5b, respectively, at portions facing each other, and these bulging portions 7a and 7b are formed.
Are partially formed on the horizontal surfaces 8a and 8b facing each other. And, between the horizontal planes 8a and 8b, a column member is provided at a predetermined interval.
10, 10, ... Are arranged. Further, reference numeral 11 is provided on the outer surface of the joining segments 5a and 5b, and is used for the widened portion tunnel 4
Of the bolt box (joining means) used for joining with the segments 6, ...
The guide rails are provided on the outer surfaces of a and 5b and extend in a line along the longitudinal direction of the tunnel 1.
このような構成のトンネル１は、まず、円形断面を有す
るシールド機で地山を掘削しつつ、膨出部7a、7bを有す
るセグメント5a、5b及び前記重複部３を覆う形状のセグ
メント5c、…を含むセグメント５、…で掘削壁面を覆工
することで、第２図に示すような本トンネル２を形成す
る。次に、セグメント5a、5bの水平面8a、8b間に所定間
隔をおいて柱在10、10、…を配設する。さらに、重複部
３のセグメント5cを撤去しつつ、シールド機や掘削機で
本トンネル２側方の地山を掘削してその掘削壁面をセグ
メント６、…で覆工することで、拡幅部トンネル４を形
成する。そして、拡幅部トンネル４のセグメント６を、
前記接合用セグメント5a、5bのボルトボックス11を介し
て接合することで、複断面を有するトンネル１を形成す
ることができる。この際、拡幅部掘削用のシールド機に
前記ガイドレール12に嵌合する部材を設ければ、シール
ド機の位置設定及び掘削方向制御が容易となって好まし
い。In the tunnel 1 having such a configuration, first, while excavating the ground with a shield machine having a circular cross section, the segments 5a and 5b having the bulging portions 7a and 7b and the segment 5c having a shape that covers the overlapping portion 3 ... By lining the excavated wall surface with the segments 5 including ..., The main tunnel 2 as shown in FIG. 2 is formed. Next, the pillars 10, 10, ... Are arranged at predetermined intervals between the horizontal surfaces 8a, 8b of the segments 5a, 5b. Further, while removing the segment 5c of the overlapping portion 3, by excavating the ground on the side of the main tunnel 2 with a shield machine or excavator and lining the excavated wall surface with the segment 6, ... To form. Then, the segment 6 of the widened portion tunnel 4 is
By joining the joining segments 5a and 5b through the bolt box 11, the tunnel 1 having a multiple cross section can be formed. At this time, it is preferable that the shield machine for excavating the widened portion is provided with a member that fits into the guide rail 12 because the position setting of the shield machine and the excavation direction control are facilitated.
従って、この実施例では、本トンネル２と拡幅部トンネ
ル４との重複部３において接合用セグメント5a、5bが配
置され、このセグメント5a、5bには、相対向する平行面
8a、8bを有する膨出部7a、7bが形成されているので、こ
の平行面8a、8b間に柱在10、…を配設することで、トン
ネル１自体を構造的に強化して十分土圧、水圧に耐えう
るトンネル１を施工することができる。これにより、図
示の如く、本トンネル２の側部に拡幅部トンネル４を接
合した断面形状を有するトンネル１が形成でき、前記従
来の如く新たに大断面のトンネルを掘削形成する場合に
比較して、無駄な部分を掘削する必要がなく、工期・工
費の大幅削減が図れる。Therefore, in this embodiment, the joining segments 5a and 5b are arranged in the overlapping portion 3 of the main tunnel 2 and the widening portion tunnel 4, and the parallel planes facing each other are arranged in the segments 5a and 5b.
Since the bulging portions 7a and 7b having 8a and 8b are formed, by disposing the pillars 10 between the parallel surfaces 8a and 8b, the tunnel 1 itself is structurally strengthened and the soil is sufficiently soiled. The tunnel 1 that can withstand pressure and water pressure can be constructed. As a result, as shown in the drawing, the tunnel 1 having a sectional shape in which the widened portion tunnel 4 is joined to the side portion of the main tunnel 2 can be formed. Since it is not necessary to excavate unnecessary parts, the construction period and construction cost can be greatly reduced.
また、膨出部7a、7bを接合用セグメント5a、5bに形成す
ることにより、耐力低下を懸念することなくボルトボッ
クス11、…やガイドレール12、…を設けることができ、
これにより拡幅部トンネル４のセグメント６、…の接合
工程が容易なものとなり、本トンネル２と拡幅部トンネ
ル４とを一体化した構造に形成することができると共
に、シールド機の位置設定及び掘削方向制御が容易とな
って好ましい。Further, by forming the bulging portions 7a, 7b on the joining segments 5a, 5b, the bolt boxes 11, ... And the guide rails 12, ... Can be provided without concern about a decrease in proof stress.
As a result, the process of joining the segments 6 of the widened portion tunnel 4 can be facilitated, the main tunnel 2 and the widened portion tunnel 4 can be formed in an integrated structure, and the position setting of the shield machine and the excavation direction can be performed. This is preferable because it is easy to control.
なお、この発明の覆工用壁体は、その細部が前記実施例
に限定されず、種々の変形例が可能である。一例とし
て、前記実施例では、２つのトンネルを接合することで
複断面を有するトンネルを形成していたが、３つ、ある
いはそれ以上のトンネルを接合する場合にもこの発明の
トンネルの構造を好適に適用することができる。The details of the wall material for lining of the present invention are not limited to the above-mentioned embodiment, and various modifications are possible. As an example, in the above embodiment, two tunnels are joined to form a tunnel having a multi-section, but the tunnel structure of the present invention is also suitable for joining three or more tunnels. Can be applied to.
「発明の効果」 以上詳細に説明したように、この発明によれば、本掘削
穴を形成した後に、該本掘削穴の側部の覆工用壁体を一
部取外し、該本掘削穴の側部に重複部分を有する拡大掘
削穴を形成してなる掘削穴のうち、前記本掘削穴側の重
複部分上下にそれぞれ配置され、この掘削穴の覆工に用
いられる覆工用壁体を、その内面の少なくとも一部を内
包に突出する膨出部に形成すると共に、この膨出部には
覆工用壁体が本掘削穴に配置された状態で相対向する平
行面をなす平坦面を形成したので、この平行面間に柱や
壁等の補強部材を配設することで、掘削穴の重複部分を
設けたことによる構造上の耐力低下を防ぐことができ
る。これにより、本掘削穴の側部に拡大掘削穴を接合し
た断面形状を有する掘削穴が形成でき、従来の如く新た
に大断面のトンネルを掘削形成する場合に比較して、無
駄な部分を掘削する必要がなく、工期・工費の大幅削減
が図れる。また、本発明では、前記覆工用壁体の外面
に、前記拡大掘削穴の形成時にシールド機を案内するガ
イドレールを掘削穴の長手方向に沿うように設けたの
で、拡大掘削穴を形成する際、拡幅部掘削用のシールド
機に、前記ガイドレールに嵌合する部材を設ければ、シ
ールド機の位置設定及び掘削方向制御が容易となる。[Advantages of the Invention] As described in detail above, according to the present invention, after the main excavation hole is formed, the lining wall body on the side portion of the main excavation hole is partially removed, Among the excavation holes formed by forming the enlarged excavation hole having the overlapping portion on the side portion, the lining wall body which is respectively arranged above and below the overlapping portion on the main excavation hole side and used for lining the excavation hole, At least a part of the inner surface is formed in the bulging portion projecting into the inner envelope, and the bulging portion is provided with parallel flat surfaces which face each other in a state where the wall material for lining is arranged in the main excavation hole. Since it is formed, by arranging a reinforcing member such as a pillar or a wall between the parallel surfaces, it is possible to prevent the structural yield strength from being reduced due to the provision of the overlapping portion of the excavation hole. This makes it possible to form an excavation hole having a cross-sectional shape in which an enlarged excavation hole is joined to the side of the main excavation hole, and excavates a useless portion as compared with the conventional case of excavating a large-section tunnel. It is not necessary to do so, and the construction period and construction cost can be greatly reduced. Further, in the present invention, since the guide rail for guiding the shield machine at the time of forming the enlarged excavation hole is provided along the longitudinal direction of the excavation hole on the outer surface of the lining wall body, the enlarged excavation hole is formed. In this case, if a member for fitting the guide rail is provided in the shield machine for excavating the widened portion, it becomes easy to set the position of the shield machine and control the excavation direction.
また、拡大掘削穴覆工用の壁体との接合手段を覆工用壁
体に設けた場合には、拡大掘削穴の覆工用壁体の接合工
程が容易なものとなり、掘削穴に配置された覆工用壁体
全体を一体構造に形成することができる、という利点が
ある。In addition, when the lining wall body is provided with a joining means for joining the wall body for lining the enlarged excavation hole, the process for joining the wall body for lining the enlarged excavation hole is facilitated and it is arranged in the excavation hole. There is an advantage that the entire wall for lining can be formed as an integral structure.
第１図ないし第２図は、この発明の一実施例である覆工
用壁体を示す図であって、第１図は断面図、第２図は本
掘削穴が施工された状態を示す断面図である。 １……トンネル（掘削穴）、２……本トンネル（本掘削
穴）、３……重複部（分）、４……拡幅部トンネル（拡
大掘削穴）、5a、5b……接合用セグメント（覆工用壁
体）、６……セグメント、7a、7b……膨出部、8a、8b…
…平行面（平坦面）、10……柱材、11……ボルトボック
ス（接合手段）、12……ガイドレール。1 and 2 are views showing a lining wall body according to an embodiment of the present invention, wherein FIG. 1 is a sectional view and FIG. 2 shows a state in which a main excavation hole is constructed. FIG. 1 ... Tunnel (drilling hole), 2 ... Main tunnel (main drilling hole), 3 ... Overlap part (min), 4 ... Widening part tunnel (enlarged drilling hole), 5a, 5b ... Joining segment ( Wall for lining), 6 ... Segments, 7a, 7b ... Swelling portions, 8a, 8b ...
… Parallel surface (flat surface), 10 …… column material, 11 …… bolt box (joining means), 12 …… guide rail.
フロントページの続き (56)参考文献 特開 昭64−75797（ＪＰ，Ａ) 特開 昭62−182398（ＪＰ，Ａ) 特開 昭53−41026（ＪＰ，Ａ) 特開 昭57−178095（ＪＰ，Ａ)Continuation of the front page (56) Reference JP-A-64-75797 (JP, A) JP-A-62-182398 (JP, A) JP-A-53-41026 (JP, A) JP-A-57-178095 (JP , A)
Claims (2)
部の覆工用壁体を一部取外し、該本掘削穴の側部に重複
部分を有する拡大掘削穴を形成してなる掘削穴のうち、 前記本掘削穴側の重複部分上下にそれぞれ配置され、 この掘削穴の覆工に用いられる覆工用壁体であって、 その内面の少なくとも一部が内方に突出する膨出部に形
成されていると共に、 この膨出部には覆工用壁体が本掘削穴に配置された状態
で相対向する平行面をなす平坦面が形成され、 かつ、前記覆工用壁体の外面には、前記拡大掘削穴の形
成時にシールド機を案内するガイドレールが掘削穴の長
手方向に沿って設けられている ことを特徴とする覆工用壁体。1. After forming the main excavation hole, a part of the lining wall on the side of the main excavation hole is removed to form an enlarged excavation hole having an overlapping portion on the side of the main excavation hole. Among the digging holes, the lining wall bodies are respectively arranged above and below the overlapping portion on the main digging hole side and used for lining the digging hole, and at least a part of the inner surface thereof projects inward. The bulging portion is formed, and the bulging portion is formed with parallel flat surfaces that face each other in the state where the wall material for lining is arranged in the main excavation hole, and The lining wall body, wherein a guide rail for guiding the shield machine when the enlarged excavation hole is formed is provided on an outer surface of the wall body along a longitudinal direction of the excavation hole.
いる ことを特徴とする覆工用壁体。2. The lining wall body according to claim 1, wherein a joining means for connecting to the wall body for lining the enlarged excavation hole is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1034450A JPH0794795B2 (en) | 1989-02-14 | 1989-02-14 | Wall for lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1034450A JPH0794795B2 (en) | 1989-02-14 | 1989-02-14 | Wall for lining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02213598A JPH02213598A (en) | 1990-08-24 |
| JPH0794795B2 true JPH0794795B2 (en) | 1995-10-11 |
Family
ID=12414587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1034450A Expired - Lifetime JPH0794795B2 (en) | 1989-02-14 | 1989-02-14 | Wall for lining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0794795B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0758037B2 (en) * | 1990-09-04 | 1995-06-21 | 鉄建建設株式会社 | Method for lining multiple drill holes and segment for lining multiple drill holes |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5341026A (en) * | 1976-09-24 | 1978-04-14 | Kubota Ltd | Underground structure |
| JPS57178095A (en) * | 1981-04-24 | 1982-11-02 | Taiho Kensetsu Kk | Construction of traverse pit |
| JPS62182398A (en) * | 1986-02-04 | 1987-08-10 | 松本 嘉司 | Shielded tunnel |
| JP2684372B2 (en) * | 1987-09-18 | 1997-12-03 | 大豊建設 株式会社 | Multiple type cross section support |
-
1989
- 1989-02-14 JP JP1034450A patent/JPH0794795B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02213598A (en) | 1990-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH035600A (en) | Method and device for constructing branch and connection part of shield tunnel and its segment | |
| JP2007077677A (en) | Construction method for underground structure | |
| JP2897667B2 (en) | Subway station structure and construction method | |
| JPH0434678B2 (en) | ||
| JPH10227199A (en) | Construction method of large sectional tunnel | |
| JPH03202599A (en) | Reinforced structure of twin tunnels | |
| JPH0794795B2 (en) | Wall for lining | |
| JP3937588B2 (en) | Construction method for underground structures | |
| JP4141321B2 (en) | How to construct a confluence of shield tunnels | |
| JP6619710B2 (en) | Tunnel widening method and tunnel reinforcement device | |
| JPH077438Y2 (en) | Cylindrical wall for lining drill holes | |
| JPH1144190A (en) | Tunnel timbering structure and method for assembling the same | |
| JP2725972B2 (en) | Underground structure construction method and segment piece used therefor | |
| JP4191536B2 (en) | How to construct a confluence of shield tunnels | |
| JP2577439B2 (en) | Construction method of branch support in tubular wall for excavation hole lining | |
| JP3406370B2 (en) | Horizontal shaft construction method | |
| JP2007009562A (en) | Construction method of shield tunnel inside road having width expanded part and segment used therefor | |
| JP2670483B2 (en) | Joining structure of inner wall in tubular wall for lining excavation hole | |
| JPH0730798Y2 (en) | Concrete segment | |
| JPS60148993A (en) | Tunnel drilling construction method | |
| JP2845138B2 (en) | How to build underground space | |
| JPH02213597A (en) | Tunnel structure | |
| JP2747486B2 (en) | Replacement method of middle pillar in lining of multiple tunnels | |
| JP2577440B2 (en) | Construction method of branch support in tubular wall for excavation hole lining and branch segment | |
| JP2001262988A (en) | Tunnel support method and tunnel support structure |