JPH09195668A - Tunnel drilling machine - Google Patents
Tunnel drilling machineInfo
- Publication number
- JPH09195668A JPH09195668A JP653796A JP653796A JPH09195668A JP H09195668 A JPH09195668 A JP H09195668A JP 653796 A JP653796 A JP 653796A JP 653796 A JP653796 A JP 653796A JP H09195668 A JPH09195668 A JP H09195668A
- Authority
- JP
- Japan
- Prior art keywords
- gripper
- segment
- reaction force
- pressure
- engages
- 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)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、既設覆工材の内壁
面に対して推進反力をとるタイプのトンネル掘削機（シ
ールド掘削機やトンネルボーリングマシンや立坑掘削機
など）に関し、推進反力を均等な圧力で既設覆工材の内
壁面に作用させることができるようにしたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel excavator (shield excavator, tunnel boring machine, shaft excavator, etc.) of a type that exerts a propulsive reaction force on an inner wall surface of an existing lining material. Is applied to the inner wall surface of the existing lining material with a uniform pressure.
【０００２】[0002]
【従来の技術】地山の掘削とセグメントの組立作業を並
行作業（同時施工）にして施工能力を向上させたシール
ド掘削機が、本願出願人により、開発され先に出願され
た（特願平６−２５３３９０号）。詳細構成は本発明の
実施例と共に後述するが、このタイプのシールド掘削機
の概略を説明する。このタイプのシールド掘削機では、
後胴部からトンネル後方に向い延びた反力伝達管に反力
部が備えられており、この反力部にグリッパが備えられ
ている。反力を支持するときにはグリッパが径方向に張
り出し、既設のセグメントの内周面に形成されたセグメ
ント凹凸部（溝）に、前記グリパが係合する。このグリ
ッパとセグメント凹凸部の係合により反力支持をしてい
る。このようにして反力支持をしているときに掘進とセ
グメント覆工を並行して行っている。2. Description of the Related Art The applicant of the present application has developed and applied for a shield excavator in which ground excavation and segment assembly work are performed in parallel (simultaneous construction) to improve the construction capability. 6-253390). The detailed configuration will be described later together with an embodiment of the present invention, but an outline of a shield excavator of this type will be described. In this type of shield excavator,
A reaction force transmission pipe extending from the rear trunk toward the rear of the tunnel is provided with a reaction force portion, and the reaction force portion is provided with a gripper. When supporting the reaction force, the gripper projects in the radial direction, and the gripper engages with the segment uneven portion (groove) formed on the inner peripheral surface of the existing segment. Reaction force is supported by the engagement of the gripper and the segment uneven portion. In this way, excavation and segment lining are performed in parallel while supporting the reaction force.
【０００３】[0003]
【発明が解決しようとする課題】ところで上記従来技術
では、グリッパとセグメント凹凸部とを、円周方向全面
において均等に接触させることは困難であり、安定した
掘進が防げられるおそれがあった。また不均等に片当り
すると、過大な接触力によりセグメントの破損等が生じ
ることがあった。このような事態は、掘進中に切羽部で
の掘進反力（推力，回転力など）が変動して掘削機が多
少振れたときなどに生じやすい。By the way, in the above-mentioned prior art, it is difficult to make the gripper and the segment concave-convex portion evenly contact with each other over the entire surface in the circumferential direction, and there is a fear that stable excavation can be prevented. Also, if the contacts are unevenly distributed, the segment may be damaged due to excessive contact force. Such a situation is likely to occur when the excavation reaction force (thrust, rotational force, etc.) at the face portion fluctuates during excavation and the excavator swings slightly.
【０００４】本発明は、上記従来技術に鑑み、セグメン
ト凹凸部のように精度のあまりよくない既設覆工材内周
面の溝に、グリッパを均等に接触させることのできるト
ンネル掘削機を提供することを目的とする。In view of the above-mentioned prior art, the present invention provides a tunnel excavator capable of uniformly contacting a gripper with a groove on an inner peripheral surface of an existing lining material which is not so accurate as a segment uneven portion. The purpose is to
【０００５】[0005]
【課題を解決するための手段】上記目的を達成する本発
明の構成は、先端にカッタヘッドを備えた前胴と、前胴
部ジャッキを介して前胴に連結されると共に後部に後胴
部ジャッキを備えた後胴と、後胴からトンネル後方に向
い延びた反力伝達管と、反力伝達管に備えた反力部から
径方向に張り出すことにより既設の覆工材の内周面に形
成されている溝に係合するグリッパと、を備えたトンネ
ル掘削機において、前記グリッパのうち前記溝に係合す
る位置に、内部の中空部に流体を封入した均圧装置を備
えたことを特徴とする。The structure of the present invention which achieves the above object is to provide a front body having a cutter head at the tip and a front body connected to the front body via a front body jack and a rear body at the rear. Inner peripheral surface of existing lining material by projecting in the radial direction from the rear case equipped with a jack, the reaction force transmission tube extending from the rear case toward the rear of the tunnel, and the reaction force section provided in the reaction force transmission tube In a tunnel excavator equipped with a gripper that engages with a groove formed in, a pressure equalizing device that encloses a fluid in a hollow portion is provided at a position of the gripper that engages with the groove. Is characterized by.
【０００６】また本発明の構成は、前記グリッパは複数
装備されており、各グリッパのうち前記溝に係合する位
置に、前記均圧装置をそれぞれ備えたことを特徴とす
る。Further, the structure of the present invention is characterized in that a plurality of the grippers are provided, and the pressure equalizing device is provided at a position of each gripper that engages with the groove.
【０００７】また本発明の構成は、前記グリッパは複数
装備されており、各グリッパのうち前記溝に係合する位
置に、前記均圧装置をそれぞれ備え、各均圧装置の中空
部どうしを接合管により連結したことを特徴とする。According to the structure of the present invention, a plurality of the grippers are provided, the pressure equalizers are provided at positions of the grippers that engage with the grooves, and the hollow portions of the pressure equalizers are joined together. It is characterized by being connected by a pipe.
【０００８】また本発明の構成は、前記中空部に封入し
た流体の圧力が予め定めた許容圧力以上になると前記流
体を中空部の外へ排出するリリーフ弁を備えたことを特
徴とする。Further, the structure of the present invention is characterized by comprising a relief valve for discharging the fluid out of the hollow portion when the pressure of the fluid sealed in the hollow portion exceeds a predetermined allowable pressure.
【０００９】本発明ではグリッパが既設覆工材内周面の
溝に係合していく際に、弾性体が変形していくので、グ
リッパと溝との接触圧が全円周において均等になる。In the present invention, since the elastic body is deformed when the gripper engages with the groove on the inner peripheral surface of the existing lining material, the contact pressure between the gripper and the groove becomes uniform over the entire circumference. .
【００１０】[0010]
【発明の実施の形態】以下に本発明の実施例を図面に基
づき詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１１】図１は本発明の第１実施例に係るシールド
掘削機を示す構成図、第２は第１実施例を一部破断して
示す斜視図である。このシールド掘削機は、セグメント
内壁面に対して推進反力を採る形式のシールド掘削機で
ある。FIG. 1 is a structural view showing a shield excavator according to a first embodiment of the present invention, and a second is a perspective view showing the first embodiment partially broken away. This shield excavator is a type of shield excavator that takes a propulsive reaction force against the inner wall surface of the segment.
【００１２】図１及び図２に示すように、カッタを配設
したカッタヘッド１を持つ前胴２と、後胴３とは、前胴
部ジャッキ４により接続されている。後胴３には後胴部
ジャッキ５が取り付けられている。更に後胴３からはト
ンネル後方に向い反力伝達管兼エレクタ旋回軸８が延び
ており、反力伝達管兼エレクタ旋回軸８の後端の反力部
９にはグリッパ１０が装備されている。グリッパ１０は
複数（本例では４個）備えられており、反力部９から径
方向に放射状に張り出すことができる。As shown in FIGS. 1 and 2, a front body 2 having a cutter head 1 having a cutter and a rear body 3 are connected by a front body jack 4. A rear body jack 5 is attached to the rear body 3. Further, a reaction force transmission pipe / erector swivel shaft 8 extends rearward of the tunnel from the rear body 3, and a gripper 10 is mounted on a reaction force portion 9 at a rear end of the reaction force transmission pipe / erector swivel shaft 8. . A plurality of (four in this example) grippers 10 are provided and can be radially projected from the reaction force portion 9.
【００１３】反力伝達管兼エレクタ旋回軸８には、エレ
クタ１２が搭載されており、セグメント供給装置７によ
り供給されたセグメント６は、エレクタ１２により搬送
・覆工されトンネルとして組み立てられる。セグメント
６の内周壁には反力受け用のセグメント凹凸部（溝）１
５が設けられている。なお１１は真円保持装置である。An erector 12 is mounted on the reaction force transmission tube / erector swivel shaft 8, and the segment 6 supplied by the segment supply device 7 is transported and lined by the erector 12 to be assembled as a tunnel. The inner peripheral wall of the segment 6 has a concave and convex portion (groove) 1 for receiving a reaction force.
5 are provided. Reference numeral 11 is a perfect circle holding device.
【００１４】また図３に示すように、各グリッパ１０の
周面には周方向に伸びるリング状のグリッパ凹部１０ａ
が形成されており、このグリッパ凹部１０ａは、前記セ
グメント凹凸部１５が嵌入する凹部形状となっている。
このグリッパ凹部１０ａのうちセグメント凹凸部１５と
係合する部位には、均圧装置としての弾性体１３が取り
付けられている。この弾性体１３の中には中空部１６が
あり、この中空部１６の中には油等の流体が満たされて
いる。Further, as shown in FIG. 3, a ring-shaped gripper recess 10a extending in the circumferential direction is formed on the peripheral surface of each gripper 10.
The gripper recess 10a has a recess shape into which the segment uneven portion 15 is fitted.
An elastic body 13 as a pressure equalizing device is attached to a portion of the gripper concave portion 10a that engages with the segment concave-convex portion 15. The elastic body 13 has a hollow portion 16, and the hollow portion 16 is filled with a fluid such as oil.
【００１５】更に図４に示すように４つの弾性体１３の
中空部１６どうしは、接続管１４により連結され同一系
統になっている。同一系統になった中空部１６及び接続
管１４の系統には、圧力計１７及びリリーフ弁１８が備
えられている。Further, as shown in FIG. 4, the hollow portions 16 of the four elastic bodies 13 are connected by a connecting pipe 14 to form the same system. A pressure gauge 17 and a relief valve 18 are provided in the same system of the hollow portion 16 and the connecting pipe 14.
【００１６】ここで、上述した構成となっている第１実
施例の動作について説明する。このタイプのシールド掘
削機では、先に出願した特願平６−２５３３９０号にも
記載したように、後胴部ジャッキ５を組立済のセグメン
ト６の端面に押し当てておき、前胴部ジャッキ４を伸ば
しつつカッタヘッド１により掘進している間に、後胴部
ジャッキ５のうち数本づつを順に縮め、縮めてあいた空
間に、エレクタ１２によりセグメント６を順次組み立て
ていく。このため地山の掘削とセグメント６の組立作業
を並行作業（同時施工）でき、施工能率が著しく向上す
る。後胴部ジャッキ５のうち数本を縮めているときに
は、反力部９のグリッパ１０を張り出し、グリッパ１０
が組立済のセグメンゴ６のセグメント凹凸部１５に係合
することにより反力支持をしている。Now, the operation of the first embodiment having the above-mentioned structure will be described. In this type of shield excavator, as described in Japanese Patent Application No. 6-253390 filed previously, the rear trunk jack 5 is pressed against the end surface of the assembled segment 6 to remove the front trunk jack 4 from the front trunk jack 4. While digging with the cutter head 1 while extending, the several pieces of the rear trunk jacks 5 are sequentially contracted, and the segments 6 are sequentially assembled in the contracted space by the erector 12. Therefore, excavation of the ground and assembly work of the segment 6 can be performed in parallel (simultaneous construction), and construction efficiency is significantly improved. When a few of the rear trunk jacks 5 are contracted, the gripper 10 of the reaction force portion 9 is projected and the gripper 10 is pulled out.
Engages with the segment concave-convex portion 15 of the assembled segmento 6 to support the reaction force.
【００１７】グリッパ１０をセグメント凹凸部１５に係
合させる場合、グリッパ１０とセグメント６との間に形
成される隙間の寸法は、図５に示すように、場所によっ
て異なり、例えばある場所の隙間寸法はδ1となり、他
の場所の隙間寸法はδ2となる。When the gripper 10 is engaged with the segment concave-convex portion 15, the size of the gap formed between the gripper 10 and the segment 6 differs depending on the place as shown in FIG. Is δ 1 , and the gap size at other locations is δ 2 .
【００１８】グリッパ１０をセグメント凹凸部１５に押
し付けていくと、弾性体１３は、各場所の隙間に応じて
それぞれ変形していく。弾性体１３は内部に中空部１６
があるので変形しやすい。また各中空部１６は接続管１
４により連結されているため、各弾性体１３の変形量が
異なっていても、各中空部１６内の流体の圧力は等しく
なる。このようにして円周方向に沿い配置した弾性体１
３が、各部の隙間に応じて変形・追従していくため、グ
リッパ１０とセグメント凹凸部１５は片当りすることな
く略均等に接触して推力を伝達することができる。した
がって安定した掘削ができると共に、セグメント６の破
損等を生じることはない。When the gripper 10 is pressed against the segment concave-convex portion 15, the elastic body 13 is deformed in accordance with the gap at each place. The elastic body 13 has a hollow portion 16 inside.
It is easy to deform because it has In addition, each hollow portion 16 is a connection pipe 1
Since they are connected by 4, the fluid pressures in the hollow portions 16 are equal even if the elastic bodies 13 have different deformation amounts. The elastic body 1 thus arranged along the circumferential direction
Since 3 deforms / follows in accordance with the gap between the respective parts, the gripper 10 and the segment concave-convex part 15 can contact each other substantially evenly and transmit the thrust force. Therefore, stable excavation can be performed, and the segment 6 is not damaged.
【００１９】また、セグメント６が耐えうる限界接触圧
力を定め、リリーフ弁１８の設定厚を前記限界接触圧力
にしておけば、推力が異常に大きくなる場合でも、中空
部１６に閉じ込められた流体をリリーフすることで、破
損の発生を防止することができる。Further, if the limit contact pressure that the segment 6 can withstand is determined and the set thickness of the relief valve 18 is set to the above limit contact pressure, even if the thrust becomes abnormally large, the fluid confined in the hollow portion 16 can be prevented. Relief can prevent the occurrence of damage.
【００２０】次に本発明の第２実施例を、図６を参照し
て説明する。第２実施例ではグリッパ１０に備えられた
４つの弾性体１３の中空部１６を連結することなく独立
させている。各中空部１６には、推力とバランスする閉
じ込め圧力で流体が封入されており、各中空部１６にそ
れぞれ圧力計１７及びリリーフ弁１８が備えられてい
る。他の部分の構成は第１実施例と同じである。Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the hollow portions 16 of the four elastic bodies 13 provided in the gripper 10 are made independent without being connected. A fluid is enclosed in each hollow portion 16 at a confining pressure that balances the thrust, and each hollow portion 16 is provided with a pressure gauge 17 and a relief valve 18, respectively. The configuration of other parts is the same as that of the first embodiment.
【００２１】第２実施例では中空部１６に封入する流体
の閉じ込め圧力とリリーフ弁１８のリリーフ圧を設定す
ることにより、推力とバランスした接触圧が得られる。
また第１実施例と同様に、均等に接触して推力を伝達す
ることができる。In the second embodiment, by setting the confining pressure of the fluid sealed in the hollow portion 16 and the relief pressure of the relief valve 18, the contact pressure balanced with the thrust can be obtained.
Further, similarly to the first embodiment, the thrust can be transmitted by evenly contacting each other.
【００２２】次に本発明の第３実施例に用いる、均圧装
置である弾性体１３を、図７に示す。この弾性体１３は
取付金具１９を介してグリッパ１０に結合されている。
そして取付金具１９に形成した加圧口２０を通して、弾
性体１３の中空部１６に対して加圧流体を出入させてい
る。弾性体１３の周囲は、グリッパ１０の表面やセグメ
ント凹凸部１５の溝側面で覆われるため、中空部１６の
内部の流体圧をきわめて大きくすることができる。Next, FIG. 7 shows an elastic body 13 which is a pressure equalizing device used in the third embodiment of the present invention. The elastic body 13 is coupled to the gripper 10 via a mounting bracket 19.
Then, the pressurized fluid is made to flow in and out of the hollow portion 16 of the elastic body 13 through the pressure port 20 formed in the mounting member 19. Since the periphery of the elastic body 13 is covered with the surface of the gripper 10 and the groove side surface of the segment concave-convex portion 15, the fluid pressure inside the hollow portion 16 can be extremely increased.
【００２３】なお、グリッパ１０の出し入れの容易さを
考慮し、セグメント凹凸部１５の溝のテーパ角度は２０
°±５°としている。In consideration of the ease with which the gripper 10 is taken in and out, the taper angle of the groove of the segment uneven portion 15 is 20.
The angle is ± 5 °.
【００２４】[0024]
【発明の効果】以上実施例と共に具体的に説明したよう
に本発明によれば、グリッパのうち既設覆工材内壁面の
溝（セグメント凹凸部）に係合する部分に均圧装置を備
えたので、グリッパと覆工材とが均等に接触し、推力の
スムーズな伝達が可能になり、安定した掘進ができる。As described above in detail with reference to the embodiments, according to the present invention, a pressure equalizing device is provided in a portion of the gripper that engages with a groove (segment uneven portion) of the inner wall surface of the existing lining material. Therefore, the gripper and the lining material are in uniform contact with each other, and the thrust can be transmitted smoothly, so that stable excavation can be performed.
【００２５】また均圧装置を備えたので、既設覆工材に
片当りすることがなく、片当りによる覆工材の破損を防
止できる。Further, since the pressure equalizing device is provided, the existing lining material is not hit against the lining material, and the lining material can be prevented from being damaged due to the hitting.
【００２６】更にリリーフ弁を用いたことにより、推力
が異常に大きくなった場合でも、覆工材の破損を防止で
きる。Further, by using the relief valve, it is possible to prevent the lining material from being damaged even when the thrust becomes abnormally large.
【図１】本発明の第１実施例に係るシールド掘削機を示
す構成図。FIG. 1 is a configuration diagram showing a shield excavator according to a first embodiment of the present invention.
【図２】第１実施例のシールド掘削機を一部破断して示
す斜視図。FIG. 2 is a perspective view showing the shield excavator of the first embodiment with a part thereof cut away.
【図３】第１実施例に備えた均圧装置（弾性体）を示す
断面図。FIG. 3 is a cross-sectional view showing a pressure equalizing device (elastic body) provided in the first embodiment.
【図４】第１実施例の要部を示す構成図。FIG. 4 is a configuration diagram showing a main part of the first embodiment.
【図５】グリッパとセグメントとの隙間状態を示す説明
図。FIG. 5 is an explanatory view showing a gap state between a gripper and a segment.
【図６】本発明の第２実施例に係るシールド掘削機の要
部を示す構成図。FIG. 6 is a configuration diagram showing a main part of a shield excavator according to a second embodiment of the present invention.
【図７】本発明の第３実施例の均圧装置（弾性体）を示
す断面図。FIG. 7 is a sectional view showing a pressure equalizing device (elastic body) according to a third embodiment of the present invention.
１ カッタヘッド ２ 前胴 ３ 後胴 ４ 前胴部ジャッキ ５ 後胴部ジャッキ ６ セグメント ７ セグメント供給装置 ８ 反力伝達管兼エレクタ旋回軸 ９ 反力部 １０ グリッパ １０ａ グリッパ凹部 １１ 真円保持装置 １２ エレクタ １３ 弾性体（均圧装置） １４ 接続管 １５ セグメント凹凸部（溝） １６ 中空部 １７ 圧力計 １８ リリーフ弁 １９ 取付金具 ２０ 加圧口 1 Cutter Head 2 Front Body 3 Rear Body 4 Front Body Jack 5 Rear Body Jack 6 Segment 7 Segment Supply Device 8 Reaction Force Transmission Pipe / Electr Swivel Shaft 9 Reaction Force Part 10 Gripper 10a Gripper Recess 11 True Circle Holding Device 12 Elector 13 Elastic Body (Equalizer) 14 Connection Pipe 15 Segment Concavo-convex Part (Groove) 16 Hollow Part 17 Pressure Gauge 18 Relief Valve 19 Mounting Bracket 20 Pressurizing Port
フロントページの続き (72)発明者 安本 匡剛 東京都中央区京橋一丁目７番１号 戸田建 設株式会社内 (72)発明者 奥村 利博 東京都中央区京橋一丁目７番１号 戸田建 設株式会社内 (72)発明者 宮内 政男 東京都中央区京橋一丁目７番１号 戸田建 設株式会社内Front page continuation (72) Inventor Tadashi Yasumoto 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Toshihiro Okumura 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Ken (72) Inventor Masao Miyauchi 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Ken
Claims (4)
胴部ジャッキを介して前胴に連結されると共に後部に後
胴部ジャッキを備えた後胴と、後胴からトンネル後方に
向い延びた反力伝達管と、反力伝達管に備えた反力部か
ら径方向に張り出すことにより既設の覆工材の内周面に
形成されている溝に係合するグリッパと、を備えたトン
ネル掘削機において、 前記グリッパのうち前記溝に係合する位置に、内部の中
空部に流体を封入した均圧装置を備えたことを特徴とす
るトンネル掘削機。1. A front body having a cutter head at its tip, a rear body connected to the front body through a front body jack and having a rear body jack at the rear, and a rear body facing rearward of the tunnel. An extended reaction force transmission tube, and a gripper that engages with a groove formed on the inner peripheral surface of the existing lining material by radially protruding from the reaction force portion provided in the reaction force transmission tube. In the tunnel excavator, a pressure equalizer having a fluid inside a hollow portion is provided at a position of the gripper that engages with the groove.
グリッパのうち前記溝に係合する位置に、前記均圧装置
をそれぞれ備えたことを特徴とする請求項１のトンネル
掘削機。2. The tunnel excavator according to claim 1, wherein a plurality of the grippers are provided, and the pressure equalizing device is provided at a position of each gripper that engages with the groove.
グリッパのうち前記溝に係合する位置に、前記均圧装置
をそれぞれ備え、各均圧装置の中空部どうしを接合管に
より連結したことを特徴とする請求項１のトンネル掘削
機。3. A plurality of grippers are provided, each pressure equalizer is provided at a position of each gripper that engages with the groove, and hollow portions of each pressure equalizer are connected by a joint pipe. The tunnel excavator according to claim 1, wherein
定めた許容圧力以上になると前記流体を中空部の外へ排
出するリリーフ弁を備えたことを特徴とする請求項１ま
たは請求項２または請求項３のトンネル掘削機。4. The relief valve according to claim 1, further comprising a relief valve for discharging the fluid to the outside of the hollow portion when the pressure of the fluid enclosed in the hollow portion exceeds a predetermined allowable pressure. Alternatively, the tunnel excavator according to claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP653796A JP3716023B2 (en) | 1996-01-18 | 1996-01-18 | Tunnel excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP653796A JP3716023B2 (en) | 1996-01-18 | 1996-01-18 | Tunnel excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09195668A true JPH09195668A (en) | 1997-07-29 |
| JP3716023B2 JP3716023B2 (en) | 2005-11-16 |
Family
ID=11641106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP653796A Expired - Fee Related JP3716023B2 (en) | 1996-01-18 | 1996-01-18 | Tunnel excavator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3716023B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008088705A (en) * | 2006-10-02 | 2008-04-17 | Tekken Constr Co Ltd | Shield method and shield machine |
-
1996
- 1996-01-18 JP JP653796A patent/JP3716023B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008088705A (en) * | 2006-10-02 | 2008-04-17 | Tekken Constr Co Ltd | Shield method and shield machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3716023B2 (en) | 2005-11-16 |
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