JPH054489B2 - - Google Patents
Info
- Publication number
- JPH054489B2 JPH054489B2 JP1172485A JP17248589A JPH054489B2 JP H054489 B2 JPH054489 B2 JP H054489B2 JP 1172485 A JP1172485 A JP 1172485A JP 17248589 A JP17248589 A JP 17248589A JP H054489 B2 JPH054489 B2 JP H054489B2
- Authority
- JP
- Japan
- Prior art keywords
- shield machine
- side wall
- movable plate
- plate
- jack
- 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
- 238000010276 construction Methods 0.000 description 10
- 239000004576 sand Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、市街地に上下水道、共同溝、電信、
電話等の布設地下道等の地下構造物を施工するオ
ープンシールド工法に使用するオープンシールド
機に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention is applicable to urban areas for water supply and sewage, public drainage, telegraph,
This invention relates to an open shield machine used in the open shield construction method for constructing underground structures such as underground passages for laying telephones, etc.
〔従来の技術〕
オープンシールド工法は、開削工法（オープン
工法）とシールド工法の長所を生かした合理性に
富む工法である。[Conventional technology] The open shield construction method is a highly rational construction method that takes advantage of the advantages of the cut-and-cover construction method (open construction method) and the shield construction method.
第５図〜第７図にその概略を示すと、図中１は
オープンシールド機で、これは左右の側壁板１
ａ，１ｂとこれら側壁板１ａ，１ｂと同程度の長
さでその間を連結する底板１ｃとからなる前面、
後面及び上面を開口したＵ型シールド機である。
該オープンシールド機１は前記側壁１ａ，１ｂと
底板１ｃの先端を断面三角匣状の刃口２として形
成し、また側壁板１ａ，１ｂの中央又は後端近く
に推進ジヤツキ３を後方に向け上下に並べて配設
する。 The outline is shown in Fig. 5 to Fig. 7. In the figure, 1 is an open shield machine, and this is the left and right side wall plate 1.
a, 1b and a bottom plate 1c having the same length as the side wall plates 1a, 1b and connecting them;
It is a U-shaped shield machine with openings on the rear and top sides.
The open shield machine 1 has the tips of the side walls 1a, 1b and the bottom plate 1c formed as a cutting edge 2 having a triangular box shape in cross section, and a propulsion jack 3 is placed rearward at the center or near the rear end of the side walls 1a, 1b to move up and down. Arrange them side by side.
図中７は、推進ジヤツキ３の後端に設けた押圧
部材で、ボツクス鋼材又は型鋼を用いた枠体より
なる。 Reference numeral 7 in the figure denotes a pressing member provided at the rear end of the propulsion jack 3, which is made of a frame made of box steel or shaped steel.
発進抗６内にこのシールド機１を設置して、シ
ールド機１の前面又は上面開口より発進抗６の前
方の土砂を掘削し、かつ排土する。そして、シー
ルド機１の推進ジヤツキ３を伸長して発進抗６内
の反力壁に反力をとつてシールド機１を前進さ
せ、コンクリート函体等による第１番目の地中構
造物４を上方から吊り降し、シールド機１のテー
ル部１ｄ内で縮めた推進ジヤツキ３の後方にセツ
トする。 This shield machine 1 is installed inside the starting shaft 6, and the earth and sand in front of the starting shaft 6 is excavated and removed from the front or top opening of the shield machine 1. Then, the propulsion jack 3 of the shield machine 1 is extended to apply a reaction force to the reaction wall in the starting shaft 6 to move the shield machine 1 forward, moving the first underground structure 4 made of a concrete box or the like upward. It is suspended from the shield machine 1 and set behind the propulsion jack 3 which is retracted within the tail section 1d of the shield machine 1.
次いで、同様にシールド機１の前面又は上面か
ら土砂を掘削しかつ排土してシールド機１を前進
させ、前記第１番目の地中構造物４の前に第２番
目の地中構造物４をシールド機１のテール部１ｄ
内に吊り降す。以下、同様の掘進及び地中構造物
４のセツト工程を繰返して、順次地中構造物４を
縦列に地中に埋設し、第７図に示すように後方の
地中構造物４上に埋戻し５を施し、図示は省略す
るがオープンシールド機１が到達坑まで達したな
らばこれを撤去して工事を完了する。 Next, earth and sand are similarly excavated and discharged from the front or upper surface of the shield machine 1, and the shield machine 1 is moved forward, and a second underground structure 4 is placed in front of the first underground structure 4. Tail part 1d of shield machine 1
hang it inside. Thereafter, the same excavation and setting process of the underground structures 4 is repeated, and the underground structures 4 are sequentially buried in the ground in columns, and as shown in FIG. Returning 5 is performed, and once the open shield machine 1 reaches the reaching shaft (not shown), it is removed and the construction is completed.
このようなオープンシールド機で、刃口２の形
状は、垂直、斜め、又はフード付きなど各種ある
が、それぞれ土質別に造られ、シールド機本体と
一体的であるために１工区内の土質の変化には応
じられない。 In such an open shield machine, the shape of the cutting edge 2 is various, such as vertical, diagonal, or hooded, but each is made for each type of soil, and because it is integrated with the shield machine body, it is difficult to change the shape of the soil within one work area. I can't respond to that.
さらに、掘削は地表面から刃口２の内部と前部
とで行うために刃口前部の土砂が緩み、地盤に変
位を生じる。 Furthermore, since excavation is carried out from the ground surface to the inside and front of the cutting edge 2, the earth and sand in front of the cutting edge loosens, causing displacement in the ground.
このような問題に対処するために発明者は先
に、第８図に示すようなオープンシールド機を発
明し、特願昭60−261553号（特開昭62−125198
号）として出願した。 In order to deal with such problems, the inventor first invented an open shield machine as shown in Fig.
No.).
これは、左右側壁板１ａ，１ｂの前端部付近に
水平方向に１〜数個の細長いスリツト８を開口し
ておき、側壁板１ａ，１ｂの外側に沿わせて１〜
数枚の可動土留板９を取付け、この内面にブラケ
ツト１０を剛結し、前記スリツト８を貫いてブラ
ケツト１０を側壁板１ａ，１ｂの内側へ突出さ
せ、側壁板１ａ，１ｂ内に設けた土留ジヤツキ１
１に枢着した。 This is done by opening one to several elongated slits 8 in the horizontal direction near the front ends of the left and right side wall plates 1a, 1b, and extending them along the outside of the side wall plates 1a, 1b.
Several movable earth retaining plates 9 are attached, brackets 10 are rigidly connected to the inner surfaces of the movable retaining plates 9, and the brackets 10 are made to protrude inside the side wall plates 1a and 1b through the slits 8, thereby forming earth retaining plates provided inside the side wall plates 1a and 1b. Jack 1
It pivoted to 1.
可動土留板９の上下は側壁板１ａ，１ｂの外方
にアングルを水平に剛結してなるガイドレール１
２に嵌め込まれる。 The upper and lower portions of the movable retaining plate 9 are guide rails 1 formed by rigidly connecting angles horizontally to the outside of the side wall plates 1a and 1b.
Fitted into 2.
このようにして、土留ジヤツキ１１を伸縮する
ことにより、可動土留板９を側壁板１ａ，１ｂの
前端より前方へ出没できる。 In this way, by expanding and contracting the retaining jack 11, the movable retaining plate 9 can be moved forward and retracted from the front ends of the side wall plates 1a and 1b.
しかし、前記第８図に示すような可動土留板９
を設けるものでは、ガイドレール１２やこの可動
土留板９が側壁板１ａ，１ｂの外側にあるので、
シールド機１の掘進時にこれらが抵抗体となり、
摩擦が増大する。また、ガイドレール１２に土砂
がはさまると可動土留板９が動き難くなるし、大
きく突出した可動土留板９が土により外側に開く
ような力を受けた場合にはブラケツト１０やガイ
ドレール１２のみでは支えきれないこともあり、
変形や損傷のおそれもある。
However, the movable retaining plate 9 as shown in FIG.
In the case where the guide rail 12 and the movable retaining plate 9 are located outside the side wall plates 1a and 1b,
These act as resistors when the shield machine 1 excavates,
Friction increases. Furthermore, if the guide rail 12 is filled with earth and sand, the movable earth retaining plate 9 becomes difficult to move, and if the movable earth retaining plate 9, which protrudes greatly, is subjected to a force that causes it to open outward from the soil, the bracket 10 and guide rail 12 alone cannot be used. Sometimes I can't support you,
There is also a risk of deformation or damage.
本発明の目的は前記従来例の不都合を解消し、
可動板を側壁板前部に外側に出張らないで、かつ
場所を取らずに設けることができ、また可動板の
安定した動きを確保できるオープンシールド機を
提供することにある。 The purpose of the present invention is to eliminate the disadvantages of the conventional example,
To provide an open shield machine in which a movable plate can be provided in front of a side wall plate without protruding outward and without taking up space, and in which stable movement of the movable plate can be ensured.
本発明は前記目的を達成するため、左右側壁板
と底板とを有し、前面、後面及び上面が開口した
断面Ｕ字型のオープンシールド機において、左右
側壁板の内側前部を間隔を存する２重壁構造に形
成し、この内部に可動板をジヤツキで前方へ突出
可能に収納したこと、可動板も２重壁構造の中空
体で、この内部にジヤツキをその一端をピン結合
するようにして収め、可動板の後方へでるジヤツ
キの他端は側壁板側に結合すること、可動板の前
端に刃口を形成すること、左右側壁板の２重壁構
造内部は上下に複数に区画し、この区画毎に可動
板を収納することを要旨とするものである。
In order to achieve the above object, the present invention provides an open shield machine having left and right side wall plates and a bottom plate and having a U-shaped cross section with openings at the front, rear and top surfaces. The movable plate was formed into a double-walled structure, and the movable plate was housed inside this so that it could be protruded forward with a jack.The movable plate was also a hollow body with a double wall structure, and the jack was connected to the inside with a pin at one end. The other end of the jack that comes out to the rear of the movable plate is connected to the side wall plate, a cutting edge is formed at the front end of the movable plate, and the inside of the double wall structure of the left and right side wall plates is divided into a plurality of upper and lower parts. The gist is to store a movable plate in each section.
請求項第１項記載の本発明によれば、可動板は
左右側壁板の内側前部の２重壁構造内に収まるの
で、側壁板の外側には何も設けずにすむ。そして
ジヤツキを伸長すれば、可動板は前方に押し出さ
れて２重壁内からせり出していくが、その際２重
壁がホルダー的な作用をして安定した動きを確保
する。
According to the invention as set forth in claim 1, the movable plate is accommodated within the double wall structure at the inner front part of the left and right side wall plates, so there is no need to provide anything on the outside of the side wall plates. When the jack is extended, the movable plate is pushed forward and protrudes from within the double wall, but at this time the double wall acts like a holder to ensure stable movement.
請求項第２項記載の本発明によれば、さらに、
ジヤツキは可動板内に収まるので、全体がコンパ
クトとなる。 According to the present invention as set forth in claim 2, further:
Since the jack fits inside the movable plate, the whole is compact.
請求項第３項記載の本発明によれば、可動板の
前端の刃口はこの可動板の位置にかかわらず左右
側壁板の前方にあり、地盤への切り込みが行え
る。 According to the third aspect of the present invention, the cutting edge at the front end of the movable plate is located in front of the left and right side wall plates regardless of the position of the movable plate, so that cutting into the ground can be performed.
請求項第４項記載の本発明によれば、突出する
可動板の枚数を選択することで、より適切に地盤
の状況に対応できる。 According to the present invention as set forth in claim 4, by selecting the number of protruding movable plates, it is possible to more appropriately respond to the ground situation.
以下、図面について本発明の実施例を詳細に説
明する。
Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は本発明のオープンシールド機の第１実
施例を示す縦断側面図、第２図は同上横断平面図
で、前記従来例を示す第５図、第６図と同一構成
要素には同一参照符号を付したものである。 Fig. 1 is a vertical sectional side view showing a first embodiment of the open shield machine of the present invention, and Fig. 2 is a lateral plan view of the same. Reference numerals are attached.
オープンシールド機１は、左右の側壁板１ａ，
１ｂとこれら側壁板１ａ，１ｂと同程度の長さで
その間を連結する底板１ｃとからなる前面、後面
及び上面を開口したＵ型シールド機で、側壁板１
ａ，１ｂの中央又は後端近くに推進ジヤツキ３を
後方に向け上下に並べて配設し、その後端に押圧
部材７を設けることは前記従来例と同じである。 The open shield machine 1 has left and right side wall plates 1a,
1b and a bottom plate 1c that has the same length as the side wall plates 1a and 1b and connects them.
The propulsion jacks 3 are arranged vertically facing rearward at the center or near the rear ends of the wheels a and 1b, and the pressing member 7 is provided at the rear ends, as in the prior art example.
本発明は第３図、第４図にその詳細を示すよう
に、左右側壁板１ａ，１ｂの内側前部に内壁板１
３を間隔を存して並行に設けて、２重壁構造に形
成した。 As shown in detail in FIGS. 3 and 4, the present invention provides an inner wall plate 1 at the inner front part of the left and right side wall plates 1a, 1b.
3 were provided in parallel with an interval to form a double wall structure.
そして、この２重壁構造内部に同じく２重壁構
造の中空体からなる可動板１４を前方へ突出可能
に収納する。この可動板１４は側壁板１ａ，１ｂ
の２重壁構造部分よりも長めで、その前端は側壁
板１ａ，１ｂの前端よりも常に突出しており、こ
の突出部分を断面三角匣状の刃口２として形成し
た。 A movable plate 14, which is also a hollow body with a double wall structure, is housed inside this double wall structure so as to be able to protrude forward. This movable plate 14 includes side wall plates 1a and 1b.
It is longer than the double wall structure part of the blade, and its front end always projects beyond the front ends of the side wall plates 1a and 1b, and this projecting part is formed as a cutting edge 2 having a triangular box shape in cross section.
前記可動板１４は内部を前後に仕切り、後方部
分にジヤツキ１５をその一端をピン結合するよう
にして収め、可動板１４の後方へでるジヤツキ１
５の他端は側壁板１ａ，１ｂ側に結合する。 The interior of the movable plate 14 is divided into front and rear parts, and a jack 15 is housed in the rear part with one end connected with a pin, and the jack 1 that comes out from the rear of the movable plate 14 is inserted into the rear part.
The other end of 5 is connected to the side wall plates 1a and 1b.
さらに、左右側壁板１ａ，１ｂの２重壁構造内
部は水平板１６で上から上下に複数段に区画し、
この区画毎に前記可動板１４やジヤツキ１５を収
納することとした。 Furthermore, the inside of the double wall structure of the left and right side wall plates 1a and 1b is divided into multiple stages from top to bottom by a horizontal plate 16,
The movable plate 14 and jack 15 are housed in each section.
また、底板１ｃの前端にも刃口１７を設ける
が、この刃口１７もジヤツキ１８を内蔵した下方
への可動刃口とし、かつ横方向に分割して並べる
ようにする。 Further, a cutting edge 17 is provided at the front end of the bottom plate 1c, and this cutting edge 17 is also a downwardly movable cutting edge with a built-in jack 18, and is arranged in horizontally divided sections.
オープンシールド機１のテール部１ｄに相当す
る左右側壁板１ａ，１ｂや底板１ｃの後部は、格
子状の仕切りによる補強リブ１９を内設した中空
板体として強度を持たせ、最後尾の天井部分には
フード２０を突設した。 The rear parts of the left and right side wall plates 1a, 1b and the bottom plate 1c, which correspond to the tail part 1d of the open shield machine 1, are strengthened as hollow plates with internal reinforcing ribs 19 made of lattice-like partitions, A hood 20 was installed protruding from the top.
次に使用法について説明するが、これを用いた
オープンシールド工法の概略については前記従来
例と同様であるのでその詳細は省略する。 Next, the method of use will be described, but since the outline of the open shield construction method using this method is the same as that of the conventional example, the details will be omitted.
シールド機１の前面又は上面の開口から土砂を
掘削し、かつ排土し、推進ジヤツキ３を伸長して
既設の地中構造物４を反力としてシールド機１を
前進させる。 Earth and sand is excavated and discharged from the front or upper opening of the shield machine 1, and the propulsion jack 3 is extended to advance the shield machine 1 using the existing underground structure 4 as a reaction force.
このようにシールド機１を掘削させる前に、ジ
ヤツキ１５を伸長すれば、可動板１４は前方に押
し出されて左右側壁板１ａ，１ｂの２重壁構造内
からせり出していくが、その際２重壁がホルダー
的な作用を可動板１４をガイドするので安定した
動きを確保する。 When the jack 15 is extended before the shield machine 1 excavates in this way, the movable plate 14 is pushed forward and protrudes from within the double wall structure of the left and right side wall plates 1a and 1b. The wall acts like a holder to guide the movable plate 14, ensuring stable movement.
また、可動板１４は左右側壁板１ａ，１ｂの内
側に常に位置するので、側壁板１ａ，１ｂの外側
には何も突出せず、掘進時に抵抗を受けることも
ない。 Moreover, since the movable plate 14 is always located inside the left and right side wall plates 1a and 1b, nothing protrudes outside the side wall plates 1a and 1b, and there is no resistance during digging.
該可動板１４は突出させるべき枚数を上から順
に選択し、このようにして突出した可動板１４は
土留板として作用するので、地表面から刃口２の
内部と前部とで掘削を行う場合に軟弱な地盤でも
左右側壁板１ａ，１ｂの土砂が緩み、地盤に変位
を生じることを防止できる。 The number of movable plates 14 to be protruded is selected in order from the top, and the movable plates 14 protruded in this way act as retaining plates, so when excavating from the ground surface with the inside and front part of the cutting edge 2. Even in soft ground, the earth and sand on the left and right side wall plates 1a, 1b can be prevented from loosening and causing displacement in the ground.
また、底板１ｃの前端の刃口１７を適宜下方へ
突出すれば、これが地盤に喰い込み、シールド機
１が浮き上がるのを防止できる。 Furthermore, if the cutting edge 17 at the front end of the bottom plate 1c is appropriately projected downward, it can be prevented from digging into the ground and lifting the shield machine 1.
次いで、推進ジヤツキ３を縮め、押圧部７を前
に移動させて、既設の地中構造物４の前端との間
に空隙を確保する。 Next, the propulsion jack 3 is retracted and the pressing part 7 is moved forward to secure a gap between it and the front end of the existing underground structure 4.
地上から新たな地中構造物４をシールド機１の
テール部１ｄ内に吊り降ろし、これを既設の地中
構造物４の前端に接続するようにセツトし、推進
ジヤツキ３を伸長し、シールド機１を前進させ、
以下同様の工程を繰返しながら地中構造物４を縦
列に地中に埋設し、また前記第７図にも示したよ
うに後方の地中構造物４上に埋戻し５を施す。 A new underground structure 4 is suspended from the ground into the tail section 1d of the shield machine 1, set to connect to the front end of the existing underground structure 4, the propulsion jack 3 is extended, and the shield machine advance 1,
Thereafter, similar steps are repeated to bury the underground structures 4 in columns in the ground, and backfill 5 is applied to the rear underground structures 4 as shown in FIG. 7.
以上述べたような本発明のオープンシールド機
は、可動板を側壁板前部に設けたので、１工区内
の土質の変化にも対応でき、前部の土砂が緩み地
盤に変位を生じることを防止できるものである。
The open shield machine of the present invention as described above has a movable plate in front of the side wall plate, so it can respond to changes in soil quality within one construction section, and prevents soil at the front from loosening and causing displacement in the ground. It is possible.
しかも、可動板は側壁板前部に外側に出張らな
いで設けることができ、シールド機の掘進時にこ
れが抵抗体となり、摩擦が増大するおそれもな
い。 Moreover, the movable plate can be provided at the front of the side wall plate without protruding outward, and there is no fear that it will act as a resistor and increase friction when the shield machine excavates.
さらに、可動板を場所を取らずにコンパクトに
設置でき、また安定した動きを確保できるもので
ある。 Furthermore, the movable plate can be installed compactly without taking up much space, and stable movement can be ensured.
第１図は本発明のオープンシールド機の第１実
施例を示す縦断側面図、第２図は同上横断平面
図、第３図は要部の横断平面図、第４図は同上縦
断側面図、第５図は従来例を示す縦断側面図、第
６図は第５図のＡ−Ａ線断面図、第７図はオープ
ンシールド工法の説明図、第８図は他の実施例を
示す要部の平面図である。
１……オープンシールド機、１ａ，１ｂ……側
壁板、１ｃ……底板、１ｄ……テール部、２……
刃口、３……推進ジヤツキ、４……地中構造物、
５……埋戻し、６……発進坑、７……押圧部材、
８……スリツト、９……可動土留板、１０……ブ
ラケツト、１１……土留ジヤツキ、１２……ガイ
ドレール、１３……内壁板、１４……可動板、１
５，１８……ジヤツキ、１６……水平板、１７…
…刃口、１９……補強リブ、２０……フード。
FIG. 1 is a vertical side view showing a first embodiment of the open shield machine of the present invention, FIG. 2 is a cross-sectional plan view of the same, FIG. 3 is a cross-sectional plan view of the main parts, and FIG. Fig. 5 is a vertical side view showing a conventional example, Fig. 6 is a sectional view taken along the line A-A in Fig. 5, Fig. 7 is an explanatory diagram of the open shield construction method, and Fig. 8 is a main part showing another embodiment. FIG. 1...Open shield machine, 1a, 1b...Side wall plate, 1c...Bottom plate, 1d...Tail part, 2...
Blade mouth, 3... Propulsion jack, 4... Underground structure,
5... Backfilling, 6... Starting pit, 7... Pressing member,
8... Slit, 9... Movable retaining plate, 10... Bracket, 11... Retaining jack, 12... Guide rail, 13... Inner wall plate, 14... Movable plate, 1
5, 18... Jackpot, 16... Horizontal plate, 17...
...blade mouth, 19...reinforcement rib, 20...hood.
Claims (1)
上面が開口した断面Ｕ字型のオープンシールド機
において、左右側壁板の内側前部を間隔を存する
２重壁構造に形成し、この内部に可動板をジヤツ
キで前方へ突出可能に収納したことを特徴とする
オープンシールド機。 ２ 可動板も２重壁構造の中空体で、この内部に
ジヤツキをその一端をピン結合するようにして収
め、可動板の後方へでるジヤツキの他端は側壁板
側に結合する請求項第１項記載のオープンシール
ド機。 ３ 可動板の前端に刃口を形成する請求項第１項
及び請求項第２項記載のオープンシールド機。 ４ 左右側壁板の２重壁構造内部は上下に複数に
区画し、この区画毎に可動板を収納する請求項第
１項及び請求項第３項記載のオープンシールド
機。[Scope of Claims] 1. In an open shield machine having left and right side wall plates and a bottom plate and having a U-shaped cross section with openings at the front, rear and top surfaces, a double wall structure in which a gap exists between the inner front parts of the left and right side wall plates. An open shield machine characterized by having a movable plate housed inside the plate so that it can be protruded forward with a jack. 2. The movable plate is also a hollow body with a double-walled structure, and the jack is housed in the hollow body by connecting one end of the jack with a pin, and the other end of the jack that comes out to the rear of the movable plate is connected to the side wall plate.Claim 1 Open shield machine as described in section. 3. The open shield machine according to claim 1 and claim 2, wherein a cutting edge is formed at the front end of the movable plate. 4. The open shield machine according to claim 1 and claim 3, wherein the inside of the double-walled structure of the left and right side wall plates is divided into a plurality of upper and lower sections, and a movable plate is housed in each section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1172485A JPH0339522A (en) | 1989-07-04 | 1989-07-04 | Open shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1172485A JPH0339522A (en) | 1989-07-04 | 1989-07-04 | Open shield machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0339522A JPH0339522A (en) | 1991-02-20 |
| JPH054489B2 true JPH054489B2 (en) | 1993-01-20 |
Family
ID=15942862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1172485A Granted JPH0339522A (en) | 1989-07-04 | 1989-07-04 | Open shield machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0339522A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7248236B2 (en) * | 2019-01-23 | 2023-03-29 | 鉄建建設株式会社 | Tunnel repair method and equipment for existing tunnels |
-
1989
- 1989-07-04 JP JP1172485A patent/JPH0339522A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0339522A (en) | 1991-02-20 |
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