JPH0437917B2 - - Google Patents
Info
- Publication number
- JPH0437917B2 JPH0437917B2 JP14454685A JP14454685A JPH0437917B2 JP H0437917 B2 JPH0437917 B2 JP H0437917B2 JP 14454685 A JP14454685 A JP 14454685A JP 14454685 A JP14454685 A JP 14454685A JP H0437917 B2 JPH0437917 B2 JP H0437917B2
- Authority
- JP
- Japan
- Prior art keywords
- drum
- drum cutter
- mud
- support member
- cutter
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 239000004576 sand Substances 0.000 claims description 4
- 238000009933 burial Methods 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000008400 supply water Substances 0.000 claims 1
- 238000009412 basement excavation Methods 0.000 description 11
- 238000005192 partition Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は矩形断面の道路トンネルを掘削するト
ンネル掘進機に係り、特に複数車線を設けること
ができるトンネルを掘削するに好適なトンネル掘
進機に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a tunnel excavating machine for excavating a road tunnel having a rectangular cross section, and particularly to a tunnel excavating machine suitable for excavating a tunnel capable of providing multiple lanes.
複数車線、例えば6車線を設けることができる
断面矩形の道路トンネルをシールド工法で施工す
る場合、従来はシールド本体の前面に複数の円形
カツターホイルを並置したトンネル掘進機を使用
することが多い。しかし、このトンネル掘進機に
おいては、各カツターホイルの回転により切羽面
を掘削するものであるから、掘削断面が第5図に
示すような状態となる。つまり掘削したい矩形輪
郭イに対して、各カツターホイルによる掘削は円
輪郭口となり、掘り残し部分ハが非常に多くなつ
て、掘進抵抗が激増する問題があつた。また、こ
のトンネル掘進機においては、シールド本体の隔
壁前面に泥水チヤンバを形成し、その泥水チヤン
バの泥水加圧によつてのみ切羽の保持を行う構成
となつているので、切羽面が大断面で、かつ切羽
の土質が互層となつていて、上下、左右の各切羽
の自立性または崩壊性が異なつている場合(切羽
が大断面となると、このような状態が多くなる)
には、前記泥水加圧のみでは切羽保持が困難とな
る。もし、切羽の一部でも崩壊すると、その崩壊
は全断面に波及し、工事の中断を招くことにな
る。
When constructing a road tunnel with a rectangular cross section that can accommodate multiple lanes, for example, six lanes, using the shield construction method, conventionally, a tunnel excavation machine with a plurality of circular cutter foils arranged side by side in front of the shield body is often used. However, in this tunnel excavating machine, the face surface is excavated by rotation of each cutter wheel, so that the excavation cross section becomes as shown in FIG. 5. In other words, for the rectangular profile A to be excavated, excavation by each cutter foil results in a circular profile opening, resulting in a large amount of unexcavated portion C, resulting in the problem of a sharp increase in excavation resistance. In addition, in this tunnel excavation machine, a muddy water chamber is formed in front of the bulkhead of the shield body, and the face is held only by pressurizing the muddy water in the muddy water chamber, so that the face face has a large cross section. , and the soil quality of the face is in alternating layers, and the self-sustainability or collapsibility of the upper and lower, left and right faces is different (this situation becomes more common when the face has a large cross section)
In this case, it becomes difficult to maintain the face using only the muddy water pressurization. If even a part of the face collapses, the collapse will spread to the entire section, causing construction to be interrupted.
本発明の目的は、掘り残し部分を少なくして推
進抵抗を小さくでき、かつ切羽の自立性または崩
壊性が均一となつていなくても切羽保持を安定し
て行え、円滑にトンネル施工を行うことがでるト
ンネル掘進機を提供することにある。
The purpose of the present invention is to reduce the propulsion resistance by reducing the unexcavated portion, and to stably maintain the face even if the self-supporting or collapsibility of the face is not uniform, and to perform tunnel construction smoothly. Our goal is to provide tunnel boring machines that allow for tunnel excavation.
本発明は、掘削用カツタとして複数個のドラム
カツタを採用すると共に、これらドラムカツタを
シールド本体の隔壁前面側に上下、左右に整列し
て、かつ互いに近接した状態で配置することによ
り、掘削したい矩形断面トンネルの輪郭に近似す
る掘削を行つて掘り残し部分を少なくし、かつド
ラムカツタ群のドラム面に面板の機能をもたせる
ことにより、該面板と泥水チヤンバの泥水加圧と
で切羽保持を安定して行うようにしたものであ
る。
The present invention employs a plurality of drum cutters as excavation cutters, and by arranging these drum cutters vertically, horizontally, and close to each other on the front side of the bulkhead of the shield body, the rectangular cross section to be excavated can be formed. By performing excavation that approximates the contour of the tunnel to reduce unexcavated parts, and by giving the drum surface of the drum cutter group the function of a face plate, the face plate is stably held by the face plate and the muddy water pressurization in the muddy water chamber. This is how it was done.
以下、本発明の一実施例を第1図ないし第3図
に従つて説明する。第1図は本発明によるトンネ
ル掘進機の縦断面図、第2図は第1図のA−A矢
視断面図、第3図は第1図をB方向から見た正面
図で、第2図、第3図はいずれも片側半分のみを
示す。図において、1は沈埋函、2は沈埋函1の
前部に連結されたシールド本体を示す。このシー
ルド本体2は断面が矩形となつていると共に、前
面に切羽側とシールド本体内とを隔離する隔壁3
を、かつ外周部に隔壁3より前方へ突出するフー
ド4をそれぞれ備えている。また、シールド本体
2は、その隔壁3の前面側に、ドラム面に多数の
掘削刃5aを取付けた複数個のドラムカツタ5を
備えている。これらのドラムカツタ5は上下、左
右に整列して、かつ互に近接した状態で配置され
ていると共に、各回転軸5bが横軸となるように
置かれている。そして、これらドラムカツタ群
は、掘削したい断面矩形のトンネルの輪郭と略等
しい輪郭で掘削できるように、個数、列数および
ドラム長さが選定されている。図示では縦一列に
4個のドラムカツタを配置し、かつこの列を9列
設けた例を示している。また、ドラムカツタ群の
背面とシード本体2の隔壁3との間には、泥水加
圧により切羽保持を行う泥水チヤンバ6が形成さ
れている。前記隔壁3には、互に隣接するドラム
カツタ5の側面間に配置される支持部材7が設け
られている。この支持部材7はドラムカツタ5の
縦列毎に連続壁で形成され、各ドラムカツタ5の
回転軸5bを回転自在に支承している。各横列
(左右列)にある各ドラムカツタ5の回転軸5b
は同軸上に位置していると共に、支持部材7内に
おいて軸継手8を介して互いに連結されている。
また、前記の各支持部材7は隔壁3の後面に突出
して設けられ、その突出した支持部材7に各ドラ
ムカツタ5を回転させる駆動機9が装着されてい
る。この駆動機9としては、油圧モータまたは電
動モータが用いられる。そして、各駆動機9から
各ドラムカツタ5への動力伝達は、駆動機9の回
転軸9aに取付けたスプロケツト10、ドラムカ
ツタ5の回転軸5bに取付けたスプロケツト11
および両スプロケツトに掛け回したチエーン12
を介して行われるようになつている。これらスプ
ロケツト10,11およびチエーン12は支持部
材の内部に収納されている。従つて、各横列にあ
る各ドラムカツタ5はそれに対応する各駆動機9
の総合駆動力により回転させられる。そして、切
羽の掘削に当つては、各横列にあるドラムカツタ
5が第1図に示す矢印方向にそれぞれ回転させら
れて、掘削土砂を泥水チヤンバ6内へ取り込むよ
うになつている。また、前記の各支持部材7の先
端部には、ドラムカツタ5側面間に侵入する掘削
土砂の大塊を破砕するビツト13が設けられ該ビ
ツト13の刃先はドラムカツタ5の前面側掘削刃
5aより僅かに後方に位置している。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a longitudinal sectional view of a tunnel boring machine according to the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG. 3 is a front view of FIG. Both the figures and FIG. 3 show only one half. In the figure, 1 indicates an immersed burial box, and 2 indicates a shield body connected to the front part of the immersed burial box 1. This shield body 2 has a rectangular cross section, and has a partition wall 3 on the front that separates the face side from the inside of the shield body.
and a hood 4 protruding forward from the partition wall 3 on the outer periphery. Further, the shield main body 2 is provided with a plurality of drum cutters 5 on the front side of the partition wall 3, each of which has a large number of digging blades 5a attached to the drum surface. These drum cutters 5 are arranged vertically, horizontally, horizontally, and close to each other, and are placed so that each rotating shaft 5b becomes a horizontal axis. The number, number of rows, and drum length of these drum cutter groups are selected so that excavation can be performed with a contour substantially equal to the contour of a tunnel with a rectangular cross section to be excavated. The illustration shows an example in which four drum cutters are arranged in a vertical line, and nine such lines are provided. Further, a muddy water chamber 6 is formed between the back surface of the drum cutter group and the partition wall 3 of the seed body 2 to hold the face by pressurizing the muddy water. The partition wall 3 is provided with a support member 7 disposed between the side surfaces of the drum cutters 5 adjacent to each other. This support member 7 is formed of a continuous wall for each column of drum cutters 5, and rotatably supports the rotating shaft 5b of each drum cutter 5. Rotating shaft 5b of each drum cutter 5 in each row (left and right rows)
are located coaxially and are connected to each other via a shaft joint 8 within the support member 7.
Further, each of the above-mentioned support members 7 is provided to protrude from the rear surface of the partition wall 3, and a driving machine 9 for rotating each drum cutter 5 is attached to the protruding support member 7. As this drive device 9, a hydraulic motor or an electric motor is used. Power is transmitted from each drive machine 9 to each drum cutter 5 through a sprocket 10 attached to the rotation shaft 9a of the drive machine 9 and a sprocket 11 attached to the rotation shaft 5b of the drum cutter 5.
and chain 12 that runs around both sprockets.
It is now being done through These sprockets 10, 11 and chain 12 are housed inside the support member. Therefore, each drum cutter 5 in each row has its corresponding drive machine 9.
It is rotated by the total driving force of. When excavating the face, the drum cutters 5 in each row are rotated in the direction of the arrow shown in FIG. 1 to take the excavated earth and sand into the muddy water chamber 6. Furthermore, a bit 13 is provided at the tip of each support member 7 for crushing large lumps of excavated earth and sand that enter between the sides of the drum cutter 5, and the cutting edge of the bit 13 is slightly smaller than the front excavation blade 5a of the drum cutter 5. Located at the rear.
一方、前記泥水チヤンバ6は、連続壁をなす各
支持部材7によつて縦方向で複数に分割され、各
泥水チヤンバには送水、排泥をそれぞれ独立して
行う送水管14および排泥管15が設けられてい
る。また、前記のドラムカツタ群のドラム面にて
泥水チヤンバの切羽面側に面板が形成されてい
る。 On the other hand, the muddy water chamber 6 is vertically divided into a plurality of parts by support members 7 forming continuous walls. is provided. Further, a face plate is formed on the drum surface of the drum cutter group on the face surface side of the muddy water chamber.
次に本実施例によりトンネルを掘削する動作に
ついて説明する。 Next, the operation of excavating a tunnel according to this embodiment will be explained.
まず、トンネル掘削機および沈埋函1を地中に
掘つた縦穴の底部に第1図の状態に設置する。次
いで、送水管14より各泥水チヤンバ6に送水し
て泥水加工による切羽保持を行つた状態でシール
ド本体2前面のドラムカツタ群を回転させると共
に、沈埋函1に推進ジヤツキ等を介して推進力を
付与する。これにより、第4図に示す如くドラム
カツタ群が切羽を掘削しつつ、シールド本体2お
よび沈埋函1が推進して、断面矩形のトンネル施
工が行われていく。掘削された土砂は、泥水チヤ
ンバ6に取り込まれ、排泥管15より水と共に地
上に排出される。 First, a tunnel excavator and a submerged box 1 are installed at the bottom of a vertical hole dug underground as shown in FIG. Next, water is sent from the water pipe 14 to each muddy water chamber 6, and while the face is maintained by muddy water processing, the group of drum cutters on the front of the shield body 2 is rotated, and a propulsion force is applied to the immersion box 1 via a propulsion jack or the like. do. As a result, as shown in FIG. 4, the shield body 2 and the immersed box 1 are propelled while the drum cutters excavate the face, and a tunnel with a rectangular cross section is constructed. The excavated earth and sand is taken into the mud water chamber 6 and discharged to the ground together with water from the mud drainage pipe 15.
このトンネル施工において、ドラムカツタ群は
掘削すべきトンネルの断面矩形輪郭と近似する輪
郭で切羽を掘削できるので、掘り残し部分がきわ
めて少なくなり、推進抵抗が大幅に減少する。ま
た、切羽の自立性または崩壊性が不均一となつて
いても、泥水チヤンバ6の泥水加圧と、ドラムカ
ツタ群のドラム面にて泥水チヤンバ切羽側に形成
された面板とで切羽保持を行えるので、切羽保持
を常に安定して行うことができる。また、本実施
例においては、泥水チヤンバ6が複数に分割さ
れ、かつ泥水チヤンバがそれぞれ独立して送水、
排泥を行えるようになつているので、自立性の悪
い切羽と対向する泥水チヤンバの泥水加圧を調節
することにより、切羽保持をより一層安定させる
ことができる。またドラムカツタ5を支承してい
る支持部材7の先端部にビツト13を設けている
ので、ドラムカツタ側面間に掘削土砂の大塊が侵
入しようとしても前記ビツト13により破砕され
るので、ドラムカツタ側端間の掘削土砂の堀残し
部を泥水中に分散できる。 In this tunnel construction, the drum cutter group can excavate a face with a contour that approximates the cross-sectional rectangular contour of the tunnel to be excavated, so there is extremely little left unexcavated, and propulsion resistance is significantly reduced. In addition, even if the self-supporting or collapsibility of the face is uneven, the face can be held by pressurizing the muddy water in the muddy water chamber 6 and by the face plate formed on the drum surface of the drum cutter group on the muddy water chamber face side. , the face can be held stably at all times. Further, in this embodiment, the muddy water chamber 6 is divided into a plurality of parts, and each of the muddy water chambers independently supplies water,
Since mud can be drained, face retention can be further stabilized by adjusting the mud water pressure in the mud water chamber facing the face with poor self-sustainability. Furthermore, since a bit 13 is provided at the tip of the support member 7 that supports the drum cutter 5, even if a large lump of excavated soil tries to enter between the sides of the drum cutter, it will be crushed by the bit 13. The excavated soil remaining in the trench can be dispersed into muddy water.
尚、本実施例においては、各ドラムカツタ5
を、その回転軸5bが横軸となるように配置した
例を示したが、回転軸5bが縦軸となるように各
ドラムカツタを配置するようにしてもよい。ま
た、本実施例では、各横列にある各ドラムカツタ
5を連結状態で回転させる例を示したが、全て列
の各ドラムカツタ5をそれぞれ独立に回転させる
構成としてもよい。 In this embodiment, each drum cutter 5
Although an example has been shown in which the drum cutters are arranged so that the rotation axis 5b becomes the horizontal axis, each drum cutter may be arranged so that the rotation axis 5b becomes the vertical axis. Further, in this embodiment, an example is shown in which the drum cutters 5 in each row are rotated in a connected state, but a configuration may be adopted in which each drum cutter 5 in all rows is rotated independently.
以上の如く、本発明によれば、断面矩形のトン
ネル施工に際して、掘り残し部分を少なくして推
進抵抗を小さくでき、しかも切羽の自立性または
崩壊性が不均一となつていても切羽保持を安定し
て行うことができる。
As described above, according to the present invention, when constructing a tunnel with a rectangular cross section, the propulsion resistance can be reduced by reducing the unexcavated portion, and the face can be stably maintained even if the self-sustainability or collapsibility of the face is uneven. You can do it by doing this.
第1図ないし第3図は本発明の一実施例を示
し、第1図は本発明によりトンネル掘進機の縦断
面図、第2図は第1図のA−A矢視断面図、第3
図は第1図をB方向から見た正面図で、第2図、
第3図はいずれも片側半分のみを示す。第4図は
トンネルを掘削している状態を示す概略図、第5
図は従来のトンネル掘進機により掘削された切羽
の断面図を示す。
1……沈埋函、2……シールド本体、3……隔
壁、5……ドラムカツタ、5a……掘削刃、5b
……回転軸、6……泥水チヤンバ、7……支持部
材、9……駆動機、10,11……スプロケツ
ト、12……チエーン、13……ビツト、14…
…送水管、15……泥水管。
1 to 3 show one embodiment of the present invention, FIG. 1 is a longitudinal sectional view of a tunnel boring machine according to the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG.
The figure is a front view of figure 1 seen from direction B, figure 2,
In each case, FIG. 3 shows only one half. Figure 4 is a schematic diagram showing the tunnel being excavated, Figure 5
The figure shows a cross-sectional view of a face excavated by a conventional tunnel boring machine. 1... Submerged box, 2... Shield body, 3... Bulkhead, 5... Drum cutter, 5a... Excavation blade, 5b
... Rotating shaft, 6 ... Mud water chamber, 7 ... Support member, 9 ... Drive machine, 10, 11 ... Sprocket, 12 ... Chain, 13 ... Bit, 14 ...
...Water pipe, 15...Mud water pipe.
Claims (1)
機であつて、沈埋函の先端部に連結される断面矩
形のシールド本体と、そのシールド本体の隔壁前
面側に上下、左右に整列して、かつ互いに接近し
た状態で配設される複数個のドラムカツタと、シ
ールド本体の隔壁後方に設置される各ドラムカツ
タの駆動機と、シールド本体の隔壁に設けられて
互に隣接するドラムカツタの側面間に配置される
支持部材と、ドラムカツタ群の背面とシールド本
体の隔壁との間に形成され、泥水加圧で切羽を保
持する泥水チヤンバと、その泥水チヤンバへ送水
する送水管および泥水チヤンバ内の排泥を行う排
泥管とを備え、各ドラムカツタの回転軸を前記支
持部材にそれぞれ回転自在に支承させると共に、
駆動機からドラムカツタへの動力伝達機構を前記
支持部材の内部に配設し、ドラムカツタ群のドラ
ム面にて泥水チヤンバ切羽面側に面板を形成した
ことを特徴とするトンネル掘進機。 2 特許請求の範囲第1項において、各ドラムカ
ツタは、その回転軸が横軸となるように配置さ
れ、かつ各横列にある各ドラムカツタの回転軸は
支持部材の部分で互いに連結される一方、支持部
材はドラムカツタの縦列毎に連続壁で形成され、
前記泥水チヤンバがその支持部材にて複数に分割
され、各泥水チヤンバにはそれぞれ独立して送
水、排泥を行う送水管、排泥管が設けられている
ことを特徴とするトンネル掘進機。 3 特許請求の範囲第1項において、前記支持部
材の先端部には、ドラムカツタ側面間に侵入する
掘削土砂を破砕するビツトが形成され、該ビツト
の刃先はドラムカツタの前面側カツタ面より僅か
に後方に位置していることを特徴とするトンネル
掘進機。[Scope of Claims] 1. A tunnel excavating machine for excavating a tunnel with a rectangular cross section, which comprises a shield body with a rectangular cross section connected to the tip of an immersed burial box, and vertically and horizontally aligned on the front side of a bulkhead of the shield body. a plurality of drum cutters disposed close to each other; a driving machine for each drum cutter installed behind the bulkhead of the shield body; and a side surface of the adjacent drum cutters installed on the bulkhead of the shield body. A support member disposed in between, a mud chamber formed between the back of the drum cutter group and the bulkhead of the shield body, which holds the face by pressurizing mud, a water pipe that supplies water to the mud chamber, and a water pipe inside the mud chamber. a sludge removal pipe for removing sludge, the rotating shaft of each drum cutter is rotatably supported by the support member, and
A tunnel excavating machine characterized in that a power transmission mechanism from a driving machine to a drum cutter is disposed inside the support member, and a face plate is formed on the mud water chamber face side of the drum surface of the drum cutter group. 2. In claim 1, each drum cutter is arranged such that its rotational axis is a horizontal axis, and the rotational axes of each drum cutter in each row are connected to each other at a support member, while the rotational axis of each drum cutter in each row is The member is formed by a continuous wall for each column of drum cutters,
A tunnel excavating machine characterized in that the muddy water chamber is divided into a plurality of parts by its support member, and each muddy water chamber is provided with a water supply pipe and a mud removal pipe that independently supply water and remove mud. 3. In claim 1, a bit is formed at the tip of the support member to crush excavated earth and sand that enters between the sides of the drum cutter, and the cutting edge of the bit is slightly rearward of the front cutter surface of the drum cutter. A tunnel boring machine characterized by being located in
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14454685A JPS6210398A (en) | 1985-07-03 | 1985-07-03 | Tunnel excavator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14454685A JPS6210398A (en) | 1985-07-03 | 1985-07-03 | Tunnel excavator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6210398A JPS6210398A (en) | 1987-01-19 |
JPH0437917B2 true JPH0437917B2 (en) | 1992-06-22 |
Family
ID=15364809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14454685A Granted JPS6210398A (en) | 1985-07-03 | 1985-07-03 | Tunnel excavator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6210398A (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0696950B2 (en) * | 1988-07-01 | 1994-11-30 | 佐藤工業株式会社 | Shield excavator |
JP2722588B2 (en) * | 1989-01-13 | 1998-03-04 | 石川島播磨重工業株式会社 | Rectangular section shield machine |
JPH0696953B2 (en) * | 1989-02-09 | 1994-11-30 | 戸田建設株式会社 | Shield machine |
EP0405981A3 (en) * | 1989-06-29 | 1991-11-13 | General Electric Company | Method for obtaining load-following and/or spectral shift capability in boiling water reactors |
JPH03170000A (en) * | 1989-11-27 | 1991-07-23 | Tekken Constr Co Ltd | Non-circular shield tunnel excavator |
JPH0823266B2 (en) * | 1991-04-05 | 1996-03-06 | 戸田建設株式会社 | Construction method of underground space |
JPH0819824B2 (en) * | 1991-04-05 | 1996-02-28 | 戸田建設株式会社 | Construction method of underground space |
JPH0819825B2 (en) * | 1991-04-05 | 1996-02-28 | 戸田建設株式会社 | Construction method of underground space |
-
1985
- 1985-07-03 JP JP14454685A patent/JPS6210398A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6210398A (en) | 1987-01-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH0437917B2 (en) | ||
US4166509A (en) | Process for excavating and constructing tunnel and excavating device | |
JPH04221122A (en) | Excavator equipped with rotary cutter having horizontal axis | |
JPH0266295A (en) | Excavator for rectangular cross-section tunnel | |
JP2000233136A (en) | Rotary crusher and sealed excavating machine | |
JP2021173103A (en) | Overcutter and rectangular propulsion machine | |
JP3776815B2 (en) | Shield machine | |
JP2648051B2 (en) | Construction method of arch shell in tunnel precedent | |
JP2662576B2 (en) | Shield excavator | |
JP3404653B2 (en) | Shield machine | |
SU979583A1 (en) | Working member of earth=moving machine | |
JP3177840B2 (en) | Drilling rig for caisson | |
JP2860046B2 (en) | Rectangular shield excavator | |
JP2722588B2 (en) | Rectangular section shield machine | |
JPH03122398A (en) | Shield excavator | |
JP3028037B2 (en) | Underground outer shell structure and tunnel excavator | |
JPH0359238B2 (en) | ||
JP2935558B2 (en) | Rectangular section shield machine | |
JP2686488B2 (en) | Shield excavator | |
JP2662629B2 (en) | Shield excavator | |
JPH0565653B2 (en) | ||
JPS6343244Y2 (en) | ||
JPH01187288A (en) | Oval shield excavator | |
SU663784A1 (en) | Trench digger working equipment | |
JPH05179886A (en) | Tunnel branching method by shield excavator and cutter plate for excavator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |