JP2952596B2 - Shield machine - Google Patents
Shield machineInfo
- Publication number
- JP2952596B2 JP2952596B2 JP63166873A JP16687388A JP2952596B2 JP 2952596 B2 JP2952596 B2 JP 2952596B2 JP 63166873 A JP63166873 A JP 63166873A JP 16687388 A JP16687388 A JP 16687388A JP 2952596 B2 JP2952596 B2 JP 2952596B2
- Authority
- JP
- Japan
- Prior art keywords
- shield machine
- tunnel
- existing tunnel
- cutter
- cover ring
- 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
- 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、トンネルのドッキングに使用するシールド
マシンに関し、詳細には、既設トンネルの側面に止水を
図りながらシールドトンネルをドッキングするシールド
マシンに関する。Description: TECHNICAL FIELD The present invention relates to a shield machine used for docking a tunnel, and more particularly, to a shield machine for docking a shield tunnel while waterproofing a side surface of an existing tunnel. .
〈従来の技術〉 第４図に示すように既設トンネルａの側面に貫通させ
て新たなシールドトンネルｂを接続する場合、既設トン
ネルａの円形周面に、シールドマシンｃの平面上のカッ
タフェィスを当接させると、カッタフェィスの上下に間
隙を生じる。<Conventional Technology> As shown in FIG. 4, when a new shield tunnel b is connected by penetrating through the side surface of the existing tunnel a, a cutter face on the plane of the shield machine c is attached to the circular peripheral surface of the existing tunnel a. When they are brought into contact, a gap is created above and below the cutter face.
この間隙を無視して施工すると、この間隙から地下水
や土砂等が進入するため、地盤の自立と地下水等の進入
防止を目的として従来は、次の対策が講じられている。If this gap is neglected, groundwater and earth and sand will enter from this gap. Therefore, the following countermeasures have been conventionally taken for the purpose of independence of the ground and prevention of the entry of groundwater.
事前に薬液注入工法を施して、既設トンネルａの周囲
の相当広い範囲ｄに渡って地盤を改良する方法。（第４
図） 間隙の発生する周辺部ｅのみに、凍結工法を施して部
分的に地盤を改良する方法。（第５図） 〈本発明が解決しようとする問題点〉 上記した従来のトンネルの接続技術には次のような問
題点がある。A method in which the ground is improved over a considerably wide range d around an existing tunnel a by applying a chemical solution injection method in advance. (4th
(Fig.) A method in which the freezing method is applied only to the peripheral part e where a gap occurs to partially improve the ground. (FIG. 5) <Problems to be Solved by the Present Invention> The conventional tunnel connection technology described above has the following problems.
〈イ〉の対策方法にあっては、既設トンネルａの下部
が地盤改良されない場合があるうえに、海底下や河川下
等ではこれらの対策工を採用できない不都合がある。In the countermeasure method <A>, there is a case where the ground of the lower part of the existing tunnel a is not improved, and there is a disadvantage that these countermeasures cannot be adopted under the seabed or a river.
又、大口径の場合は、強度不足となる問題もある。 In the case of a large diameter, there is also a problem that strength is insufficient.
〈ロ〉の対策方法の場合、凍結までに長時間を要する
だけでなく、凍結圧によって既設トンネルａに偏圧が加
わり、そのうえ、解凍時に地盤に緩みを生じるといった
問題がある。In the case of the measure <2>, not only does it take a long time to freeze, but also there is a problem that the freezing pressure applies a partial pressure to the existing tunnel a, and that the ground is loosened during thawing.
〈ハ〉の対策方法共に、地盤改良費がかかることに
より施工コストが高くつくうえに、工期が長期化する傾
向にある。In both of the measures <c>, construction costs are high due to ground improvement costs, and the construction period tends to be prolonged.
〈本発明の目的〉 本発明は以上の点に鑑みて成されたもので、地盤改良
を不要とし、工期の短縮及び施工費の低減を図れ、しか
も海底や河川下において施工が可能な、トンネルのドッ
キングに使用するシールドマシンを提供することを目的
とする。<Object of the present invention> The present invention has been made in view of the above points, and eliminates the need for ground improvement, shortens the construction period and reduces the construction cost, and can be constructed on the seabed or under a river. An object of the present invention is to provide a shield machine used for docking of a vehicle.
〈本発明の構成〉 以下、第１、２図を参照にしながら本発明の一実施例
について説明する。<Configuration of the Present Invention> An embodiment of the present invention will be described below with reference to FIGS.
先ず、シールドマシンについて説明する。 First, the shield machine will be described.
〈イ〉シールドマシン 第１図にシールドマシン１の一例を示す。<A> Shield machine Fig. 1 shows an example of the shield machine 1.
このシールドマシン１は、その前部11内に出入り自在
のカバーリング12を収容している。The shield machine 1 accommodates a cover ring 12 that can freely enter and exit within a front portion 11 thereof.
〈ロ〉カバーリング カバーリング12は、両端を開放した、硬質ゴム製、樹
脂製、鋼製等の筒体からなり、その前面13は既設トンネ
ル２の外周の曲面に対応する曲面に形成してある。<B> Covering The cover ring 12 is formed of a cylinder made of hard rubber, resin, steel or the like with both ends opened, and its front surface 13 is formed into a curved surface corresponding to the curved surface of the outer periphery of the existing tunnel 2. is there.
このカバーリング12は、その前面13の全域が既設トン
ネル２の外周に当接して止水を図れる形状であれば良
い。The cover ring 12 may have any shape as long as the entire area of the front surface 13 can contact the outer periphery of the existing tunnel 2 to stop water.
従って、カバーリング12の全面の形状は、既設トンネ
ル２の周面形状によって異なる。Therefore, the shape of the entire surface of the cover ring 12 differs depending on the peripheral surface shape of the existing tunnel 2.
〈ハ〉カバーリングの駆動手段 又、カバーリング12の後部とシールドマシン１間に
は、カバーリング12を進退するためのシリンダ３が複数
組介在してある。<C> Driving Means of Covering Between the rear part of the cover ring 12 and the shield machine 1, there are provided a plurality of cylinders 3 for moving the cover ring 12 forward and backward.
〈ニ〉オーバーカッタ 又、シールドマシン１のカッタ部14の前面には、固定
式のカッタビット15群を有すると共に、カッタ部14の周
縁部には、出入り自在にオーバーカッタ16を有する。<D> Over cutter Also, a fixed cutter bit 15 group is provided on the front surface of the cutter section 14 of the shield machine 1, and an over cutter 16 is provided at the periphery of the cutter section 14 so as to be able to enter and exit freely.
オーバーカッタ16は、液圧を利用したり、或はギア類
を組み合わせて、トンネルの掘進方向と直交する方向に
出入りするよう構成してある。The over cutter 16 is configured to enter and exit in a direction perpendicular to the tunnel excavation direction by using hydraulic pressure or combining gears.
〈ホ〉オーバーカッタの進退量 オーバーカッタ16の進退量は、カバーリング12が突出
するときに衝突しない寸法まで後退でき、且つ、カバー
リング12が突出しないときは、シールドマシン１の外径
をカバーできる寸法まで突出するよう構成してある。<E> Advancing and retracting amount of the over cutter The over retracting amount of the over cutter 16 can be retracted to a dimension that does not collide when the covering 12 protrudes, and when the covering 12 does not protrude, the outer diameter of the shield machine 1 is covered. It is configured to protrude to the maximum possible size.
尚、シールドマシン１の内面及びカッタ部14の外周部
にリング状のシール材17が設けられている。In addition, a ring-shaped sealing material 17 is provided on the inner surface of the shield machine 1 and the outer peripheral portion of the cutter unit 14.
〈作用〉 次にトンネルの施工方法について説明する。<Operation> Next, a tunnel construction method will be described.
〈イ〉通常の掘進時（第３図） 先端に前記構造のシールドマシン１を位置させ、既設
トンネル２へ向けてトンネルを構築する。<A> During normal excavation (Fig. 3) The shield machine 1 having the above structure is positioned at the tip, and a tunnel is constructed toward the existing tunnel 2.
このとき、カバーリング12はシールドマシン１内に収
容すると共に、オーバーカッタ16を突出させた状態で掘
進する。At this time, the cover ring 12 is housed in the shield machine 1 and excavates with the over cutter 16 protruding.
〈ロ〉トンネルの接続（第１図） 〈ロ−１〉カバーリングの前進 円形の外周面を有する既設トンネル２の周面に直接カ
ッタ部14を貫入すると、両者間に間隙を生じてしまう。<B> Connection of Tunnel (Fig. 1) <b-1> Advance of Covering If the cutter portion 14 penetrates directly into the peripheral surface of the existing tunnel 2 having a circular outer peripheral surface, a gap is created between them.
そこで、シールドマシン１のカッタ部14が既設トンネ
ル２の周面に接近したら、オーバーカッタ16をカッタ部
14内に収容する。Therefore, when the cutter section 14 of the shield machine 1 approaches the peripheral surface of the existing tunnel 2, the over cutter 16 is moved to the cutter section.
Housed in 14.
次に、カバーリング12を既設トンネル２の周面へ向け
て突出する。Next, the cover ring 12 is projected toward the peripheral surface of the existing tunnel 2.
カバーリング12の伸長が困難なときは、カバーリング
12の貫入方向に向けて超高圧水を噴射しながら貫入する
と、カバーリング12の貫入抵抗を低減できる。If it is difficult to extend the cover ring 12,
The penetration resistance of the cover ring 12 can be reduced by injecting the ultrahigh-pressure water in the penetration direction of the cover ring 12 while injecting it.
カバーリング12を地中を貫入すると、その前面13の全
域が既設トンネル２の外周面に密着し、既設トンネル２
とシールドマシン１との間が遮蔽される。When the cover ring 12 penetrates through the ground, the entire area of the front surface 13 is in close contact with the outer peripheral surface of the existing tunnel 2 and the existing tunnel 2
And the shield machine 1 are shielded.
〈ロ−２〉カバーリング内の掘削 この状態で、シールドマシン１の掘進作業を再開し
て、既設トンネル２の側部に接続トンネル４を接続す
る。<B-2> Excavation in the covering In this state, the excavation work of the shield machine 1 is restarted, and the connection tunnel 4 is connected to the side of the existing tunnel 2.
尚、カバーリング12の前面13と既設トンネル２の周面
間で、密着しない箇所が発生した場合は、これらの箇所
に止水材を注入して完全に止水を図る。If there are places that do not adhere to each other between the front surface 13 of the cover ring 12 and the peripheral surface of the existing tunnel 2, a waterproof material is injected into these places to completely stop the water.
〈本発明の効果〉 本発明は以上説明したようになるから次のような効果
を得ることができる。<Effects of the Present Invention> The present invention is as described above, and the following effects can be obtained.
〈イ〉薬液注入工法や凍結工法等による地盤改良が不要
であるから、施工期間の短縮と工費の低減を図ることが
できる。<A> Since the ground improvement by the chemical liquid injection method, the freezing method, or the like is unnecessary, the construction period can be shortened and the construction cost can be reduced.
〈ロ〉従来施工が不可能とされていた、海底や河川下で
の施工が可能となる。<B> It is possible to perform work under the seabed or under a river, which was previously impossible.
〈ハ〉シールドマシンと既設トンネル間をカバーリング
で機械的に遮蔽するので、確実な遮蔽効果が得られる。<C> Since the shielding machine and the existing tunnel are mechanically shielded by the covering, a reliable shielding effect can be obtained.
第１図：本発明に係る一実施例の説明図であってトンネ
ル接続部の断面図 第２図：カバーリングの斜視図 第３図：シールドマシンで既設トンネルの近傍まで掘進
するときの部分断面図 第４、５図：従来技術の説明図FIG. 1 is an explanatory view of one embodiment according to the present invention, and is a cross-sectional view of a tunnel connection part. FIG. 2: a perspective view of a covering. FIG. Figures 4 and 5: Illustration of the prior art
Claims (1)
部とカッタ部の周縁部に出入り自在に配置されたオーバ
ーカッタとを備え、曲面外周面を有する既設トンネルに
外周面からドッキングするシールドトンネルを構築する
シールドマシンにおいて、 シールドマシンの前部内に進退自在に収容され、カッタ
部の外周より大きい径の筒体のカバーリングとを備え、 カバーリングの先端は既設トンネルの側面形に対応し、
既設トンネルとシールドマシンの周面間を遮蔽すること
を特徴とする、 シールドマシン。1. A shield tunnel, comprising: a cutter portion disposed on a front surface of a shield machine; and an overcutter disposed so as to be able to move in and out of a peripheral portion of the cutter portion, and docking from an outer peripheral surface to an existing tunnel having a curved outer peripheral surface. In the shield machine to be built, the shield machine is housed in the front part of the shield machine so as to be able to move forward and backward, and has a cylindrical cover ring with a diameter larger than the outer circumference of the cutter part, and the tip of the cover ring corresponds to the side shape of the existing tunnel,
A shield machine characterized by shielding between the existing tunnel and the peripheral surface of the shield machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63166873A JP2952596B2 (en) | 1988-07-06 | 1988-07-06 | Shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63166873A JP2952596B2 (en) | 1988-07-06 | 1988-07-06 | Shield machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0220794A JPH0220794A (en) | 1990-01-24 |
| JP2952596B2 true JP2952596B2 (en) | 1999-09-27 |
Family
ID=15839213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63166873A Expired - Lifetime JP2952596B2 (en) | 1988-07-06 | 1988-07-06 | Shield machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2952596B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5836441B1 (en) * | 2014-06-30 | 2015-12-24 | 進和技術株式会社 | Control method for bringing the tip of the excavator into close contact with the existing structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5751794U (en) * | 1980-09-04 | 1982-03-25 |
-
1988
- 1988-07-06 JP JP63166873A patent/JP2952596B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0220794A (en) | 1990-01-24 |
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