JPH07180471A - Shield machine - Google Patents
Shield machineInfo
- Publication number
- JPH07180471A JPH07180471A JP32366893A JP32366893A JPH07180471A JP H07180471 A JPH07180471 A JP H07180471A JP 32366893 A JP32366893 A JP 32366893A JP 32366893 A JP32366893 A JP 32366893A JP H07180471 A JPH07180471 A JP H07180471A
- Authority
- JP
- Japan
- Prior art keywords
- shield
- vertical shaft
- shield excavator
- shaft
- mortar
- 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.)
- Pending
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はシールド掘削機に関し、
特に、立坑とシールド掘削機との接続作業の工期を短縮
するためのシール装置に関する。BACKGROUND OF THE INVENTION The present invention relates to a shield excavator,
In particular, the present invention relates to a sealing device for shortening the work period for connecting the shaft and the shield excavator.
【０００２】[0002]
【従来の技術】図９〜図１２を参照して従来の接続工法
を説明する。図９において、１はケーソン基礎によるコ
ンクリート製の立坑であり、地山２中に埋められてい
る。立坑１の側壁３のうち、シールド掘削機４との接続
のため除去される部分５は、コンクリート製の強度の高
い内側部分５Ａと、モルタル製の強度の低い外側部分５
Ｂとからできている。内側部分５Ａはシールド掘削機４
の接続前に必要な強度を確保できる範囲で肉薄に作られ
ており、以下、仮壁と称する。また、立坑１の側壁３に
は、地山２側に開口する地盤改良剤の注入通路６が貫通
しており、バルブ７を介してモルタルのタンク（図示省
略）に接続されている。2. Description of the Related Art A conventional connecting method will be described with reference to FIGS. In FIG. 9, reference numeral 1 denotes a concrete shaft made of caisson foundation, which is buried in the ground 2. Of the side wall 3 of the shaft 1, the portion 5 removed for connection with the shield excavator 4 includes an inner portion 5A made of concrete having high strength and an outer portion 5 made of mortar having low strength.
It is made of B and. The inner part 5A is a shield excavator 4
It is made thin as far as necessary strength can be secured before connection, and is hereinafter referred to as a temporary wall. Further, a side wall 3 of the shaft 1 penetrates a ground improvement agent injection passage 6 that opens to the side of the natural ground 2 and is connected to a mortar tank (not shown) via a valve 7.
【０００３】そして、シールド掘削機４がトンネルを掘
り進んで図９の如く立坑１に到達すると、そのままモル
タル部分５Ｂを掘削し、図１０の如く仮壁５Ａの手前で
掘削を止める。この状態で、注入通路６を通して立坑１
側から、更にはシールド掘削機４側から、モルタル８を
地山２中に注入して、シールド本体（スキンプレート）
９及びその後方のセグメント１０の周囲の地盤を改良す
る。この地盤改良は、仮壁５Ａを除去する際に、隙間１
１から立坑１内に土砂，水が流入するのを防ぐためであ
る。When the shield excavator 4 digs through the tunnel and reaches the vertical shaft 1 as shown in FIG. 9, the mortar portion 5B is excavated as it is, and the excavation is stopped before the temporary wall 5A as shown in FIG. In this state, through the injection passage 6, the vertical shaft 1
Mortar 8 is injected into the ground 2 from the side and further from the shield excavator 4 side, and the shield body (skin plate)
Improve the ground around 9 and the segment 10 behind it. This ground improvement is performed by removing the gap 1 when removing the temporary wall 5A.
This is to prevent the inflow of earth and sand and water from shaft 1 into the shaft 1.
【０００４】モルタルの注入と、それによる地盤改良が
終了したら、図１１に示すように、立坑１内から別の機
械１２により仮壁５Ａを除去する。これにより、立坑１
にシールド掘削機４が貫通して両者が接続されるので、
シールド本体９をトンネル構造物として残し、他のカッ
タヘッド１３等の機器を運び去り、適宜な後処理を行
う。なお、仮壁５Ａの除去後、図１２に示す如く、シー
ルド本体９先端のフード１４が立坑１内に入るまでシー
ルド掘削機４を前進させることもある。When the injection of mortar and the ground improvement by it are completed, the temporary wall 5A is removed from the shaft 1 by another machine 12 as shown in FIG. As a result, shaft 1
Since the shield excavator 4 penetrates through and both are connected,
The shield main body 9 is left as a tunnel structure, other devices such as the cutter head 13 are carried away, and appropriate post-treatment is performed. After removing the temporary wall 5A, the shield excavator 4 may be advanced until the hood 14 at the tip of the shield body 9 enters the vertical shaft 1 as shown in FIG.
【０００５】[0005]
【発明が解決しようとする課題】仮壁５Ａの除去の際に
土砂や水の大量流入を防ぐ方法として、前述の如く従来
は、モルタル８を地山２に注入して地盤改良を図るだけ
である。そのため、シールド本体９及びセグメント１０
周囲の広範囲にわたってモルタル８を注入し、地盤が十
分固まった後でないと、仮壁５Ａの除去作業及びシール
ド本体９の前進作業を行うことができず、それだけ工期
が長くかかっていた。大きなトンネルの場合、モルタル
注入に１ケ月以上要する。As described above, as a method for preventing a large amount of sediment or water from flowing in when removing the temporary wall 5A, conventionally, the mortar 8 is simply injected into the ground 2 to improve the ground. is there. Therefore, the shield body 9 and the segment 10
Only after the mortar 8 has been poured over a wide range of the surroundings and the ground has hardened sufficiently, the work of removing the temporary wall 5A and the work of advancing the shield body 9 cannot be performed, which requires a long construction period. For large tunnels, it takes more than a month to inject mortar.
【０００６】本発明は上述の従来技術に鑑み、立坑とシ
ールド掘削機との接続に要する工期を短縮することがで
きるシール装置を備えたシールド掘削機を提供すること
を目的とする。In view of the above-mentioned conventional technique, it is an object of the present invention to provide a shield excavator equipped with a seal device which can shorten the construction period required for connecting the shaft and the shield excavator.
【０００７】[0007]
【課題を解決するための手段】本発明によるシールド掘
削機は、シールド掘削機のシールド本体の前部外周に形
成した環状凹部と、この環状凹部の開口部に設置した環
状のシール板と、この環状シール板を外方へ変形させる
力付与装置とを具備することを特徴とするものである。A shield excavator according to the present invention comprises an annular recess formed on the outer periphery of a front part of a shield body of the shield excavator, an annular seal plate installed at an opening of the annular recess, and A force applying device for deforming the annular seal plate outward is provided.
【０００８】[0008]
【作用】立坑接続部分の仮壁（内側部分）を立坑内から
除去する前に、外側部分を掘削して出来た穴に環状シー
ル板が入った状態で、力付与装置を作動させる。これに
より環状シール板が変形してシールド本体の外方へ突出
し、立坑との間をシールする。従って、地盤改良剤の注
入中に仮壁の除去作業を並行して行っても立坑内に土砂
や水が流入するのを阻止でき、工期を短縮することがで
きる。Operation: Before removing the temporary wall (inner portion) of the vertical shaft connecting portion from the inside of the vertical shaft, the force applying device is operated while the annular seal plate is placed in the hole formed by excavating the outer portion. As a result, the annular seal plate is deformed and protrudes to the outside of the shield body to seal the gap with the vertical shaft. Therefore, even if the removal work of the temporary wall is performed in parallel during the injection of the ground improvement agent, the inflow of earth and sand and water into the shaft can be prevented, and the construction period can be shortened.
【０００９】[0009]
【実施例】以下、図１〜図８を参照して本発明の実施例
を説明する。Embodiments of the present invention will be described below with reference to FIGS.
【００１０】図５に全体の概略構成を示す。同図５の如
く、シールド掘削機４のシールド本体９の前部外周に、
環状のシール装置１５をシールド本体９から突出可能に
設けてある。一方、立坑１の側壁３のうち、シールド掘
削機４との接続部分５は従来と同じくコンクリート製の
内側部分即ち仮壁５Ａと、モルタル製又はスポンジやゴ
ム製の外側部分５Ｂからなり、仮壁５Ａの厚さは側壁３
の厚さの約１／４にしてある。FIG. 5 shows an overall schematic structure. As shown in FIG. 5, on the outer periphery of the front part of the shield body 9 of the shield excavator 4,
An annular sealing device 15 is provided so that it can project from the shield body 9. On the other hand, in the side wall 3 of the shaft 1, the connection portion 5 with the shield excavator 4 is composed of a concrete inner portion, that is, a temporary wall 5A and an outer portion 5B made of mortar or sponge or rubber as in the conventional case. 5A thickness is side wall 3
Is about 1/4 of the thickness.
【００１１】図１〜図４によりシール装置１５の詳細を
説明する。環状シール装置１５は、薄いばね鋼等の金属
製の環状シール板即ち、円筒シール１７と力付与装置１
８とからなる。そして、シールド本体９の前部外周に環
状凹部１９を形成し、この環状凹部１９の開口部に円筒
シール１７の前後端部を固定してある。Details of the sealing device 15 will be described with reference to FIGS. The annular seal device 15 is an annular seal plate made of a metal such as thin spring steel, that is, the cylindrical seal 17 and the force applying device 1.
8 and. An annular recess 19 is formed on the outer periphery of the front part of the shield body 9, and the front and rear ends of the cylindrical seal 17 are fixed to the opening of the annular recess 19.
【００１２】図１，図２の実施例では、力付与装置はジ
ャッキ１８Ａであり、環状凹部１９の底に取付口を適宜
数設け、多数のジャッキ１８Ａを円周上等配に設けてあ
る。このジャッキ１８Ａを作動（伸長）させることによ
り、円筒シール１７の中央部が塑性変形して、シールド
本体９の外方へ突出し、シール動作を行う。In the embodiment shown in FIGS. 1 and 2, the force applying device is a jack 18A, and an appropriate number of mounting ports are provided on the bottom of the annular recess 19 and a large number of jacks 18A are provided on the circumference in equal distribution. By operating (extending) this jack 18A, the central portion of the cylindrical seal 17 is plastically deformed and protrudes outside the shield body 9 to perform the sealing operation.
【００１３】図３，図４の実施例では、力付与装置１８
は圧力流体であり、環状凹部１９と円筒シール１７間を
気密に接合し、その内部空間を弁２０を介して圧力流体
源２１に接続してある。弁２０を開くことにより、圧力
流体が供給されて円筒シール１７の中央部が塑性変形
し、シールド本体９の外方へ突出してシール動作を行
う。In the embodiment of FIGS. 3 and 4, the force application device 18
Is a pressure fluid, and the annular recess 19 and the cylindrical seal 17 are hermetically joined to each other, and the internal space thereof is connected to the pressure fluid source 21 via the valve 20. When the valve 20 is opened, the pressure fluid is supplied and the central portion of the cylindrical seal 17 is plastically deformed and protrudes to the outside of the shield body 9 to perform the sealing operation.
【００１４】図中、２５はカッタヘッド駆動機構等の支
持部材、２６はシールド掘削機側のモルタル注入通路で
ある。In the figure, reference numeral 25 is a support member for a cutter head drive mechanism and the like, and 26 is a mortar injection passage on the side of the shield excavator.
【００１５】次に図５〜図８を参照して、本発明のシー
ルド掘削機と立坑との接続工法を説明する。Next, the method of connecting the shield excavator and the shaft according to the present invention will be described with reference to FIGS.
【００１６】接続作業としては、シールド掘削機４が立
坑１に到達すると、図５の如く、立坑１側のバルブ７及
びシールド掘削機４側のバルブ１６を開き、地山２中に
地盤改良剤としてモルタル８の注入を開始する。As the connecting work, when the shield excavator 4 reaches the shaft 1, the valve 7 on the shaft 1 side and the valve 16 on the shield excavator 4 side are opened as shown in FIG. Then, the injection of mortar 8 is started.
【００１７】次に、モルタル注入中に、図６の如く、シ
ールド掘削機４を前進させ、立坑１の接続部分５の掘削
を開始する。この掘削中、環状シール装置１５が掘削し
た穴５Ｃに入った後、環状シール装置１５の円筒シール
１７を変形してシールド本体９の外方へ突出させ、立坑
１との間をシールする。例えば、図６の如く、外側部分
５Ｂの掘削がちょうど完了した所で、ジャッキ１８Ａを
伸長させることにより、または弁２０を開いて圧力流体
を供給することにより、環状シール装置１５の円筒シー
ル１７を変形させ、この状態でシールド掘削機４の前進
を停止する。Next, during the injection of mortar, the shield excavator 4 is advanced to start excavation of the connecting portion 5 of the shaft 1 as shown in FIG. During this excavation, after the annular seal device 15 enters the excavated hole 5C, the cylindrical seal 17 of the annular seal device 15 is deformed and protrudes to the outside of the shield body 9 to seal the gap with the vertical shaft 1. For example, as shown in FIG. 6, just after excavation of the outer portion 5B is completed, the cylindrical seal 17 of the annular sealing device 15 is opened by extending the jack 18A or opening the valve 20 to supply the pressurized fluid. It is deformed, and in this state, the advance of the shield excavator 4 is stopped.
【００１８】そして、モルタル注入とシール装置１５に
よるシールを行っているまま、図７の如く、立坑１内か
ら接続部分５のコンクリート製仮壁５Ａを機械１２で除
去する。While the mortar is being injected and the sealing device 15 is still performing the sealing, the temporary concrete wall 5A of the connecting portion 5 is removed by the machine 12 from the vertical shaft 1 as shown in FIG.
【００１９】仮壁５Ａの除去後、必要に応じて図８の如
くシールド本体９のフード１４が立坑１内にちょうど入
るまで、シールド掘削機４を前進させて止める。After removing the temporary wall 5A, the shield excavator 4 is advanced and stopped until the hood 14 of the shield body 9 just enters the vertical shaft 1 as shown in FIG.
【００２０】仮壁５Ａの除去後も、又はその後のシール
ド掘削機４の前進後もモルタル８の注入を続け、所要量
に達したら止める。この間、カッタヘッド１３等の撤
去、シールド本体９内の二次巻き作業など、適宜な後処
理を行う。環状シール装置１５はそのまま放置しても、
又は撤去してもかまわない。Injection of the mortar 8 is continued even after the removal of the temporary wall 5A or after the advance of the shield excavator 4 thereafter, and when the required amount is reached, it is stopped. During this time, appropriate post-treatments such as removal of the cutter head 13 and secondary winding work in the shield body 9 are performed. Even if the annular sealing device 15 is left as it is,
Or you may remove it.
【００２１】[0021]
【発明の効果】本発明のシールド掘削機はシールド本体
の前部外周に、力付与装置により外方へ変形する環状の
シール板（円筒シール）を備えているので、これによ
り、地盤改良剤の注入中に、シールド本体と立坑の接続
部分の内周間をシールして接続部分の内側部分（仮壁）
の除去作業を並行して行うことができ、立坑とシールド
掘削機との接続工期を短縮することができる。The shield excavator of the present invention is provided with an annular seal plate (cylindrical seal) which is deformed outward by the force applying device on the outer circumference of the front part of the shield body. The inner part of the connection part (temporary wall) by sealing between the inner circumference of the connection part of the shield body and the shaft during injection
Can be performed in parallel, and the connection period between the shaft and the shield excavator can be shortened.
【図１】本発明の一実施例を示す断面図。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】本発明の一実施例を示す断面図。FIG. 2 is a sectional view showing an embodiment of the present invention.
【図３】本発明の他の実施例を示す図。FIG. 3 is a diagram showing another embodiment of the present invention.
【図４】本発明の他の実施例を示す図。FIG. 4 is a diagram showing another embodiment of the present invention.
【図５】本発明のシールド掘削機による立坑との接続工
法を示す図。FIG. 5 is a diagram showing a method of connecting a vertical shaft with a shield excavator of the present invention.
【図６】本発明のシールド掘削機による立坑との接続工
法を示す図。FIG. 6 is a view showing a method of connecting a vertical shaft with a shield excavator of the present invention.
【図７】本発明のシールド掘削機による立坑との接続工
法を示す図。FIG. 7 is a diagram showing a method of connecting a vertical shaft with a shield excavator of the present invention.
【図８】本発明のシールド掘削機による立坑との接続工
法を示す図。FIG. 8 is a diagram showing a method of connecting a vertical shaft with a shield excavator of the present invention.
【図９】従来技術を示す図。FIG. 9 is a diagram showing a conventional technique.
【図１０】従来技術を示す図。FIG. 10 is a diagram showing a conventional technique.
【図１１】従来技術を示す図。FIG. 11 is a diagram showing a conventional technique.
【図１２】従来技術を示す図。FIG. 12 is a diagram showing a conventional technique.
１ 立坑 ２ 地山 ３ 側壁 ４ シールド掘削機 ５ 接続部分 ５Ａ 内側部分（仮壁） ５Ｂ 外側部分 ５Ｃ 穴 ６，２６ 注入通路 ７，１６，２０ バルブ ８ 地盤改良剤（モルタル） ９ シールド本体 １０ セグメント １３ カッタヘッド １４ フード １５ シール装置 １７ 環状シール板（円筒シール） １８ 力付与装置 １８Ａ ジャッキ １９ 環状凹部 ２１ 圧力流体源 1 Shaft 2 Ground 3 Sidewall 4 Shield excavator 5 Connection part 5A Inner part (temporary wall) 5B Outer part 5C Hole 6,26 Injection passage 7,16,20 Valve 8 Ground improvement agent (mortar) 9 Shield body 10 Segment 13 Cutter head 14 Hood 15 Sealing device 17 Annular seal plate (cylindrical seal) 18 Force applying device 18A Jack 19 Annular recess 21 Pressure fluid source
Claims (1)
周に形成した環状凹部と、この環状凹部の開口部に設置
した環状のシール板と、この環状シール板を外方へ変形
させる力付与装置とを具備することを特徴とするシール
ド掘削機。1. An annular recess formed on the outer periphery of a front part of a shield body of a shield excavator, an annular seal plate installed at an opening of the annular recess, and a force applying device for deforming the annular seal plate outward. And a shield excavator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32366893A JPH07180471A (en) | 1993-12-22 | 1993-12-22 | Shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32366893A JPH07180471A (en) | 1993-12-22 | 1993-12-22 | Shield machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07180471A true JPH07180471A (en) | 1995-07-18 |
Family
ID=18157279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32366893A Pending JPH07180471A (en) | 1993-12-22 | 1993-12-22 | Shield machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07180471A (en) |
-
1993
- 1993-12-22 JP JP32366893A patent/JPH07180471A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19990309 |