JPH0663424B2 - Muddy water shield excavator - Google Patents

Muddy water shield excavator

Info

Publication number
JPH0663424B2
JPH0663424B2 JP1047101A JP4710189A JPH0663424B2 JP H0663424 B2 JPH0663424 B2 JP H0663424B2 JP 1047101 A JP1047101 A JP 1047101A JP 4710189 A JP4710189 A JP 4710189A JP H0663424 B2 JPH0663424 B2 JP H0663424B2
Authority
JP
Japan
Prior art keywords
water
gravel
cutter
water supply
shield excavator
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
Application number
JP1047101A
Other languages
Japanese (ja)
Other versions
JPH02229394A (en
Inventor
節雄 臼井
勝彦 西村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Okumura Corp
Original Assignee
Okumura Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Okumura Corp filed Critical Okumura Corp
Priority to JP1047101A priority Critical patent/JPH0663424B2/en
Publication of JPH02229394A publication Critical patent/JPH02229394A/en
Publication of JPH0663424B2 publication Critical patent/JPH0663424B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
    • E21D9/13—Devices for removing or hauling away excavated material or spoil; Working or loading platforms using hydraulic or pneumatic conveying means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
    • E21D9/0657—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end structurally associated with rock crushers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Description

【発明の詳細な説明】 ＜産業上の利用分野＞ この発明は、埋設管の推進工法などの用いられる泥水式
シールド掘削機に関する。TECHNICAL FIELD The present invention relates to a muddy water type shield excavator used for a propulsion method of a buried pipe and the like.

＜従来の技術＞ 従来、この種の泥水式シールド掘削機としては第５図に
示すようなものがある。この泥水式シールド掘削機は、
シールド穀51内の隔壁52を貫通する回転軸53の前端に、
後方に向かって大径となる略円錘台状のコーン54を備え
る一方、上記シールド穀51の前端に、後方に向かって小
径となる擂り鉢状の内周面を有するフード55を備えてい
る。上記コーン54とフード55との隙間は、環状の礫破砕
部Ａを構成している。上記コーン54の前端にカッタ56を
備えており、このカッタ56は、上記回転軸53の中心軸を
含む厚板からなるアーム58と、これに垂直で円板の一部
を切り欠いた形状のカッタアーム57と、このカッタアー
ム57の前面に取り付けた刃59,…とからなっている。ま
た、上記隔壁52を開口して、フード55およびコーン54の
後面とこの隔壁52とで囲まれたチャンバ60内に水を供給
する送水管61と、上記チャンバ60内から泥水を排出する
排泥管62とを設けている。そして、モータ70を駆動して
回転軸53を回転させて、上記カッタ56でシールド穀51内
に礫を取り込み、上記礫破砕部Ａにてフード55の内周面
とコーン54の外周面でこの擂を押圧・破砕して土砂とな
し、上記礫に続いて取り込んだ礫の圧力でチャンバ60内
にこの土砂を押し出し、上記チャンバ60内にてこの土砂
と送水管61から供給された水とを混ぜて泥水とし、排泥
管62を通して排泥するようにしている。<Prior Art> Conventionally, there is a mud-type shield excavator of this type as shown in FIG. This muddy water shield excavator
At the front end of the rotating shaft 53 that penetrates the partition wall 52 in the shield grain 51,
On the other hand, a cone-shaped cone 54 having a large diameter toward the rear is provided, while at the front end of the shield grain 51, a hood 55 having a mortar-shaped inner peripheral surface having a diameter toward the rear is provided. . The gap between the cone 54 and the hood 55 constitutes an annular gravel crushing section A. A cutter 56 is provided at the front end of the cone 54, and the cutter 56 has an arm 58 made of a thick plate including the central axis of the rotating shaft 53 and a shape in which a part of a disk perpendicular to the arm 58 is cut out. It comprises a cutter arm 57 and blades 59, ... Attached to the front surface of the cutter arm 57. Further, the partition wall 52 is opened, and a water supply pipe 61 for supplying water into a chamber 60 surrounded by the rear surface of the hood 55 and the cone 54 and the partition wall 52, and sludge for discharging muddy water from the chamber 60. A pipe 62 is provided. Then, the motor 70 is driven to rotate the rotary shaft 53, the gravel is taken into the shield grain 51 by the cutter 56, and the inner peripheral surface of the hood 55 and the outer peripheral surface of the cone 54 are separated by the gravel crushing section A. The mulch is pressed and crushed to form earth and sand, and the earth and sand are extruded into the chamber 60 by the pressure of the gravel that has been captured after the above gravel, and the earth and sand and the water supplied from the water supply pipe 61 are separated in the chamber 60. It is mixed into muddy water, and the sludge is discharged through the sludge pipe 62.

＜発明が解決しようとする課題＞ ところで、上記従来の泥水式シールド掘削機は、隔壁52
を開口して送水管61および排泥管62が設けられているた
め、第５図中の矢印Ｗに示すように、チャンバ60内に供
給された水が、上記チャンバ60内を通過して還流する。
そのため、この掘削機は、礫層を掘削・推進することは
できるが、粘度土層を掘削する場合、上記礫破砕部Ａに
粘性土が詰まって、この粘性土が排出されず、掘削・推
進が困難であるという問題がある。<Problems to be Solved by the Invention> By the way, the conventional muddy water shield excavator has a partition wall 52.
Since the water supply pipe 61 and the mud discharge pipe 62 are opened by opening the water, the water supplied into the chamber 60 flows back through the chamber 60 as shown by an arrow W in FIG. To do.
Therefore, this excavator can excavate and propel the gravel layer, but when excavating the clay layer, the gravel crushing section A is clogged with the cohesive soil and the cohesive soil is not discharged. There is a problem that is difficult.

そこで、この発明の目的は、礫層と粘性土層のいずれに
おいても円滑に掘削・推進することができる泥水式シー
ルド掘削機を提供することにある。Therefore, an object of the present invention is to provide a muddy water type shield excavator that can be smoothly excavated and propelled in both a gravel layer and a cohesive soil layer.

＜課題を解決するための手段＞ 上記目的を達成するために、この発明は、シールド穀内
の隔壁を貫通する回転軸の前端にカッタを設け、上記カ
ッタと隔壁との間に礫破砕部を設け、この礫破砕部と隔
壁との間のチャンバに排泥管を開口させた泥水式シール
ド掘削機において、上記回転軸およびカッタの内部を通
って、上記礫破砕部に向けて開口する第１送水径路を備
えたことを特徴としている。<Means for Solving the Problems> In order to achieve the above object, the present invention provides a cutter at a front end of a rotary shaft that penetrates a partition wall in a shield grain, and forms a gravel crushing unit between the cutter and the partition wall. In a muddy water shield excavator in which a sludge discharge pipe is opened in a chamber between the gravel crushing section and the partition wall, a first opening that opens through the rotary shaft and the cutter toward the gravel crushing section It is characterized by having a water supply path.

また、上記泥水式シールド掘削機は、上記シールド穀の
前端面に設けたフードを貫通し、回転軸側の礫破砕部に
向けて開口する第２送水径路を備えるのが望ましい。Further, it is preferable that the muddy water shield excavator includes a second water feed passage that penetrates a hood provided on a front end surface of the shield grain and opens toward a gravel crushing portion on the rotating shaft side.

＜作用＞ 粘性土によって礫破砕部が閉塞した場合、上記回転軸お
よびカッタの内部を通って上記礫破砕部に向けて開口す
る第１送水径路を通鈴して礫破砕部へ水を送水すると、
この開口から噴出する水によって、上記礫破砕部に詰ま
った粘性土が礫破砕部から後方のチャンバ内に流し出さ
れる。このため、上記礫破砕部は閉塞することがなくな
って、円滑に掘削・推進可能となる。<Operation> When the gravel crushing section is blocked by the cohesive soil, when water is supplied to the gravel crushing section through the first water supply passage opening through the inside of the rotary shaft and the cutter toward the gravel crushing section ,
The water ejected from this opening causes the cohesive soil clogged in the gravel crushing section to flow out from the gravel crushing section into the rear chamber. For this reason, the crushed gravel portion is not blocked, and excavation and propulsion can be smoothly performed.

また、上記フードを貫通し、回転軸側の礫破砕部に向け
て開口する第２送水径路を備えた場合、この第２送水径
路を通して送水すると、コーンが回転することによって
上記開口から噴出する水がコーンの周囲全体に行き渡っ
て、コーンの周囲に付着した粘性土が流し出されて、よ
り一層円滑に掘削・推進可能となる。Further, when a second water supply path that penetrates the hood and opens toward the gravel crushing portion on the rotating shaft side is provided, when water is supplied through this second water supply path, the water that is ejected from the opening due to the rotation of the cone Will spread all around the cone, and the cohesive soil adhering to the periphery of the cone will be washed out, enabling even smoother excavation and propulsion.

＜実施例＞ 以下、この発明の泥水式シールド掘削機を図示の実施例
により詳細に説明する。<Example> Hereinafter, the muddy water type shield excavator of the present invention will be described in detail with reference to the illustrated examples.

この発明の泥水式シールド掘削機は、第１図に示すよう
に、シールド穀１内の隔壁２を貫通する回転軸３の前端
に、後方に向かって大径となる略円錐台状のコーン４を
備える一方、上記シールド穀１の前端に、後方に向かっ
て小径となる擂り鉢状の内周面を有するフード５を備え
ている。上記コーン４の後端部とフード５の後端部との
隙間は、環状の礫破砕部Ｂを構成している。上記コーン
４の前端にカッタ６を備えており、このカッタ６は、厚
板からなるアーム８と、これに垂直で円板の一部を切り
欠いた形状（第２図に正面から見た図を示す）のカッタ
アーム７と、このカッタアーム７の前面に取り付けた刃
9,…とからなっている。上記回転軸の後端面にロータリ
ジョイント28を介して取り付けた送水管17と、上記回転
軸３を貫通する貫通孔21と、上記アーム８の内部を貫通
し、上記礫破砕部Ｂに向かって開口するコの字状の貫通
孔22とを設けて、第１送水径路Ｗ１を構成している。な
お、上記貫通孔22の口径を少し絞って開口し、噴出する
水の流速を高めるようにしている。このアーム８の断面
は第３図に示すようになる。また、上記隔壁２を開口し
て、フード５およびコーン４の後面とこの隔壁２とで囲
まれたチャンバ10内に水を供給する送水管11と、上記チ
ャンバ10内から泥水を排出する排泥管12とを設けてい
る。なお、上記送水管11,送水管７および排泥管12には
それぞれ送水バルブ14,送水バルブ18,排泥バルブ15を設
けている。さらに、これらのバルブの後方に、この掘削
機を動作させないときに水を迂回させるバイパス管13と
バイパスバルブ16を設けている。以下の動作説明では、
このバイパスバルブ16は閉じられているものとする。As shown in FIG. 1, the muddy water type shield excavator of the present invention has a cone 4 of a substantially truncated cone shape having a large diameter toward the rear, at the front end of a rotary shaft 3 penetrating a partition wall 2 in a shield grain 1. On the other hand, at the front end of the shield grain 1, there is provided a hood 5 having a mortar-shaped inner peripheral surface whose diameter decreases toward the rear. The gap between the rear end of the cone 4 and the rear end of the hood 5 constitutes an annular gravel crushing section B. A cutter 6 is provided at the front end of the cone 4, and the cutter 6 has an arm 8 made of a thick plate and a shape in which a part of a disk is cut out perpendicularly to the arm 8 (a view seen from the front in FIG. 2). And a blade attached to the front surface of the cutter arm 7.
It consists of 9, ... A water pipe 17 attached to the rear end surface of the rotary shaft via a rotary joint 28, a through hole 21 penetrating the rotary shaft 3 and the inside of the arm 8 and opening toward the gravel crushing section B. A U-shaped through hole 22 is provided to form the first water supply passage W 1 . In addition, the diameter of the through hole 22 is slightly narrowed and opened to increase the flow velocity of the jetted water. The cross section of the arm 8 is as shown in FIG. Further, a water supply pipe 11 for supplying water into a chamber 10 surrounded by the rear surface of the hood 5 and the cone 4 and the partition 2 by opening the partition 2, and sludge for discharging muddy water from the chamber 10. A tube 12 is provided. The water supply pipe 11, the water supply pipe 7 and the sludge discharge pipe 12 are provided with a water supply valve 14, a water supply valve 18 and a sludge discharge valve 15, respectively. Further, behind these valves, there are provided a bypass pipe 13 and a bypass valve 16 that divert water when the excavator is not in operation. In the operation description below,
This bypass valve 16 is assumed to be closed.

地盤の礫層を掘削する場合、送水バルブ14および排泥バ
ルブ15を開く一方、送水バルブ18を閉じた状態にして、
送水管11を通してチャンバ10内に水を供給し、このチャ
ンバ10内から排泥管12を通してその水を排出するように
する。そして、駆動モータ30,30を動作させて、減速機3
1,31および歯車32,32を介して回転軸３を回転させる。
以下、第５図に示した従来の泥水式シールド掘削機と略
同様に、上記カッタ６でシールド穀１内に礫を取り込
み、上記礫破砕部Ｂにてこの礫を押圧・破砕して土砂と
なし、上記礫に続いて取り込んだ礫の圧力でチャンバ10
内に上記土砂を押し出し、このチャンバ10内にてこの土
砂と供給された水とを攪拌羽根23で攪拌して泥水とし、
上記排泥管12を通して排泥する。When excavating the gravel layer of the ground, while the water supply valve 14 and the mud discharge valve 15 are opened, the water supply valve 18 is closed,
Water is supplied into the chamber 10 through the water supply pipe 11, and the water is discharged from the chamber 10 through the sludge pipe 12. Then, the drive motors 30 and 30 are operated to drive the speed reducer 3
The rotating shaft 3 is rotated via 1,31 and gears 32,32.
In the same manner as in the conventional muddy water type shield excavator shown in FIG. 5, gravel is taken into the shield grain 1 by the cutter 6, and the gravel is crushed and pressed by the gravel crushing section B to form earth and sand. None, chamber 10 with the pressure of the gravel taken after the above gravel
The earth and sand are extruded in, and the earth and sand and the supplied water are agitated by the agitation blade 23 in the chamber 10 to form muddy water,
The sludge is discharged through the sludge pipe 12.

粘性土層に遭遇して粘性土によって礫破砕部Ｂが閉塞し
た場合、送水バルブ14を閉じる一方、排泥バルブ15およ
び送水バルブ18を開いた状態にして、第１送水径路Ｗ１
を通して上記礫破砕部Ｂに向かって水が噴出するように
する。すると、礫破砕部Ｂに詰まった粘性度が後方のチ
ャンバ10に流し出される。この噴出はカッタ６の回転と
ともに回転し、礫破砕部Ｂおよびフード５内周面をまん
べんなく洗浄するので、上記礫破砕部Ｂは閉塞すること
がなくなって、円滑に掘削・推進することができる。な
お、第１送水経路は軸心に設けたが、径方向から軸方向
に延びるようにしてもよい。When the gravel crushing section B is blocked by the cohesive soil when the cohesive soil layer is encountered, the water supply valve 14 is closed while the mud discharge valve 15 and the water supply valve 18 are opened, and the first water supply path W 1
Through which water is jetted toward the gravel crushing section B. Then, the viscosity that is clogged in the crushed gravel portion B is flowed out to the rear chamber 10. This jet rotates with the rotation of the cutter 6 and cleans the gravel crushing portion B and the inner peripheral surface of the hood 5 evenly. Therefore, the gravel crushing portion B is not blocked and can be smoothly excavated and propelled. Although the first water supply path is provided at the axial center, it may be extended from the radial direction to the axial direction.

また、第４図に示す別の実施例のように、上記フード５
を貫通し、送水管19を設けて回転軸側の礫破砕部Ｂに向
けて開口口する第２送水径路Ｗ２を備えた場合、これを
通して送水すると、コーン４が回転することによって上
記開口から噴出する水がコーンの周囲全体に行き渡っ
て、コーンの周囲に付着した粘性土が流し出されて、よ
り一層円滑に掘削・推進することができる。Also, as in another embodiment shown in FIG.
When a second water supply passage W 2 is provided through which a water supply pipe 19 is provided to open toward the gravel crushing section B on the rotating shaft side, when water is supplied through the second water supply path W 2 , the cone 4 is rotated to move from the opening. The spouted water spreads around the entire cone and the cohesive soil adhering to the periphery of the cone is flushed out, so that excavation and promotion can be carried out even more smoothly.

＜発明の効果＞ 以上より明らかなように、この発明は、回転軸およびカ
ッタの内部を通って、このカッタと隔壁との間に礫破砕
部に向けて開口する第１送水径路を設けているので、礫
破砕部に詰まった粘度を第１送水経路からの水でチャン
バ内に向けて排出でき、かつ、フード内周面をまんべん
なく洗浄でき、礫層はもちろん、粘性土層においても円
滑に掘削・推進することができる。<Effects of the Invention> As is clear from the above, according to the present invention, the first water supply passage that opens toward the gravel crushing portion is provided between the cutter and the partition wall through the inside of the rotary shaft and the cutter. Therefore, it is possible to discharge the viscosity clogged in the crushed gravel part toward the inside of the chamber with the water from the first water supply path, and to thoroughly clean the inner peripheral surface of the hood, and to smoothly excavate not only the gravel layer but also the cohesive soil layer.・ Can be promoted.

また、シールド穀の前端側に設けたフードを貫通し、回
転軸側の礫破砕部に向けて開口する第２送水径路を設け
た場合、回転軸側の礫破砕部の全周に付着した粘土を全
て回転軸の回転に伴って取り除くことができ、より一層
円滑に掘削・推進することができる。Also, when a second water supply path that penetrates the hood provided on the front end side of the shield grain and opens toward the gravel crushing portion on the rotating shaft side is provided, the clay attached to the entire circumference of the gravel crushing portion on the rotating shaft side Can be removed along with the rotation of the rotary shaft, and excavation and propulsion can be performed more smoothly.

【図面の簡単な説明】[Brief description of drawings]

第１図はこの発明の泥水式シールド掘削機の一実施例を
示す概略断面図、第２図は第１図に示す泥水式シールド
掘削機を矢印IIの方向から見た図、第３図は第１図にお
けるIII−III線矢視断面図、第４図はこの発明の泥水式
シールド掘削機の別の実施例を示す概略断面図、第５図
は従来の泥水式シールド掘削機を示す概略断面図であ
る。 1,51……シールド穀、2,52……隔壁、 3,53……回転軸、4,54……コーン、 5,55……フード、6,56……カッタ、 7,57……カッタアーム、8,58……アーム、 9,59……刃、10,60……チャンバ、 11,17,19,61……送水管、 12,62……排泥管、13,63……バイパス管、 14,18,20,64……送水バルブ、 15,65……排泥バルブ、 16,66……バイパスバルブ、23……攪拌羽根、 A,B……礫破砕部、Ｗ……還流径路、 Ｗ１……第１送水径路、Ｗ２……第２送水径路。FIG. 1 is a schematic cross-sectional view showing an embodiment of the muddy water shield excavator of the present invention, FIG. 2 is a view of the muddy water shield excavator shown in FIG. 1 as seen from the direction of arrow II, and FIG. A sectional view taken along the line III-III in FIG. 1, FIG. 4 is a schematic sectional view showing another embodiment of the muddy water shield excavator of the present invention, and FIG. 5 is a schematic view showing a conventional muddy water shield excavator. FIG. 1,51 …… Shielded grain, 2,52 …… Bulkhead, 3,53 …… Rotating shaft, 4,54 …… Cone, 5,55 …… Hood, 6,56 …… Cutter, 7,57 …… Cutter Arm, 8,58 ... Arm, 9,59 ... Blade, 10,60 ... Chamber, 11,17, 19,61 ... Water pipe, 12,62 ... Mud pipe, 13,63 ... Bypass Pipes, 14,18,20,64 ... Water supply valve, 15,65 ... Drainage valve, 16,66 ... Bypass valve, 23 ... Stirring blade, A, B ... Dust crushing section, W ... Reflux Path, W 1 ... 1st water supply path, W 2 ... 2nd water supply path.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】シールド穀内の隔壁を貫通する回転軸の前
端にカッタを設け、上記カッタと隔壁との間に礫破砕部
を設け、この礫破砕部と隔壁との間のチャンバに排泥管
を開口させた泥水式シールド掘削機において、 上記回転軸およびカッタの内部を通って、上記礫破砕部
に向けて開口する第１送水径路を備えたことを特徴とす
る泥水式シールド掘削機。1. A cutter is provided at a front end of a rotary shaft that penetrates a partition wall in a shield grain, and a gravel crushing unit is provided between the cutter and the partition wall, and sludge is discharged into a chamber between the gravel crushing unit and the partition wall. A mud-water shield excavator having a pipe opened, the first water-passage path being opened toward the gravel crushing portion through the inside of the rotary shaft and the cutter. 【請求項２】上記シールド穀の前端側に設けたフードを
貫通し、回転軸側の礫破砕部に向けて開口する第２送水
径路を備えたことを特徴とする請求項１に記載の泥水式
シールド掘削機。2. The muddy water according to claim 1, further comprising a second water supply passage which penetrates a hood provided on a front end side of the shield grain and opens toward a gravel crushing portion on a rotating shaft side. Type shield excavator.
JP1047101A 1989-02-28 1989-02-28 Muddy water shield excavator Expired - Lifetime JPH0663424B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1047101A JPH0663424B2 (en) 1989-02-28 1989-02-28 Muddy water shield excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1047101A JPH0663424B2 (en) 1989-02-28 1989-02-28 Muddy water shield excavator

Publications (2)

Publication Number Publication Date
JPH02229394A JPH02229394A (en) 1990-09-12
JPH0663424B2 true JPH0663424B2 (en) 1994-08-22

Family

ID=12765788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1047101A Expired - Lifetime JPH0663424B2 (en) 1989-02-28 1989-02-28 Muddy water shield excavator

Country Status (1)

Country Link
JP (1) JPH0663424B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH083318B2 (en) * 1991-08-28 1996-01-17 株式会社利根 Muddy water press type excavator

Also Published As

Publication number Publication date
JPH02229394A (en) 1990-09-12

Similar Documents

Publication Publication Date Title
US5437500A (en) Tunneling machine with center cutter and debris removing means
JPH0663424B2 (en) Muddy water shield excavator
JP3160234B2 (en) Shield machine
JPS6130117B2 (en)
JP3357309B2 (en) Mud type excavator
JP2004092140A (en) Tunnel excavation machine
JPS621350Y2 (en)
JP2860451B2 (en) Shield machine
JP3047964B2 (en) Semi-shield machine and semi-shield method
JPH09221988A (en) Pipe press-fit construction
JPH0953392A (en) Gravel crushing shield excavator
JPS6214229Y2 (en)
JP3174858B2 (en) Semi-shield machine and semi-shield method using this semi-shield machine
JPH07127378A (en) Muddy water type shield machine and front gravel obstacle elimination method
JPS60112995A (en) Shield drilling machine
JPS63247497A (en) Shield excavator for crushing gravel
JP3306709B2 (en) Side hole construction machine
JPH0414556Y2 (en)
JPS6214230Y2 (en)
JPH0941858A (en) Drilling device and pipe pressing-in structure
JPH11117665A (en) Slurry pressure-shielding machine
JPH083318B2 (en) Muddy water press type excavator
JPH06346688A (en) Cutter slit clogging-preventing method for slurry shield machine
JPH09119280A (en) Excavator and pipe press-in structure
JPH09273387A (en) Shield machine