JPH074174A - Pit mouth sealing device - Google Patents
Pit mouth sealing deviceInfo
- Publication number
- JPH074174A JPH074174A JP14748593A JP14748593A JPH074174A JP H074174 A JPH074174 A JP H074174A JP 14748593 A JP14748593 A JP 14748593A JP 14748593 A JP14748593 A JP 14748593A JP H074174 A JPH074174 A JP H074174A
- Authority
- JP
- Japan
- Prior art keywords
- sealing
- excavator
- space
- cylindrical member
- cylindrical
- 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]
【産業上の利用分野】本発明は坑口封止装置に関し、更
に詳しくは坑口の地盤に対して坑口から地盤内に向かっ
て貫入する坑孔掘削機などの円筒状体を摺動可能に封止
するための封止装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wellhead sealing device, and more particularly to a slidably sealing a cylindrical body such as a wellbore excavator which penetrates into the ground of a wellhead from the wellhead into the ground. To a sealing device for
【０００２】[0002]
【従来の技術】近時、トンネルなどの掘削にあたってシ
ールド型の掘削機が多く用いられている。かかる掘削機
による工事を開始するにあたっては、まず掘削機を発進
する位置の前方地盤面にコンクリートなどによって補強
した壁体を造成すると共に進入方向の地盤内に薬液等を
注入して奥行きの深い固化層を形成し、次いでこの壁体
に掘削機が進入するための坑口を形成してこれに図５〜
６に示すようなエントランスパッキン装置を取り付け、
その後に坑口に残った壁体を破壊して除去し、掘削機の
先端を坑口に嵌合させた後に前記の固化層に向かって掘
削機を発進させ、しかるのち掘削機とエントランスパッ
キン装置との間の封止性能を調べるために耐圧試験を行
うようにしていた。2. Description of the Related Art Recently, shield type excavators are often used for excavating tunnels and the like. When starting construction with such an excavator, first create a wall body reinforced with concrete etc. on the front ground surface at the position where the excavator will start and inject chemical liquid etc. into the ground in the approach direction to solidify deeply. A layer is formed, and then a wellhead is formed in this wall for the excavator to enter, and this is shown in FIG.
Attach the entrance packing device as shown in 6,
After that, the wall remaining in the well is destroyed and removed, the tip of the excavator is fitted into the well, and then the excavator is started toward the solidified layer, and then the excavator and the entrance packing device are connected. A pressure resistance test was carried out to investigate the sealing performance between them.
【０００３】このような従来のエントランスパッキン装
置は、図５〜６に示すように、フランジ付の環状体ａを
坑口にアンカーボルトなどによって固定し、かつコンク
リートモルタルなどをその隙間に充填して封止してあ
り、ゴム製環状のシートパッキンｃと環状に配列したフ
ラップ付金具ｄとをフランジｂの上に順に取り付けて構
成されている。そして掘削機の先端が進入するときは、
フラップｅがシートパッキンｃを押して掘削機の進入を
助け、封止性能の試験をするために掘削機の前面部に加
圧水などを注入するときはシートパッキンｃをフラップ
ｅが支えて、後方向にまくれることがないようにになっ
ている。In such a conventional entrance packing device, as shown in FIGS. 5 and 6, an annular body a with a flange is fixed to a wellhead by an anchor bolt or the like, and concrete mortar or the like is filled in the gap and sealed. It is stopped and is constituted by sequentially mounting a rubber annular sheet packing c and an annularly arranged metal fitting d with a flap on the flange b. And when the tip of the excavator enters,
The flap e pushes the sheet packing c to assist the excavator from entering, and when injecting pressurized water or the like into the front part of the excavator to test the sealing performance, the sheet packing c is supported by the flap e to move backward. It is designed so that it will not be served.
【０００４】[0004]
【発明が解決しようとする課題】しかしながらこのよう
な従来の装置は、部品数が多いうえに坑口への取付けの
ための工数が多く、取付けに要する日数も多くかかると
いう問題があった。そのうえ掘削機を嵌合させる前に前
面に残った壁体を除去するのに手数がかかるばかりでな
く、その作業の安全を確保するために地盤の固化層の深
さも１０ｍ程度に厚くすることが必要であって、工費が
嵩む原因となっていた。However, such a conventional device has a problem in that it has a large number of parts, a large number of man-hours for attachment to the wellhead, and a large number of days required for attachment. Moreover, it is not only time-consuming to remove the wall remaining on the front side before fitting the excavator, but it is also necessary to increase the depth of the solidified layer of the ground to about 10 m to ensure the safety of the work. It was necessary and was a cause of increasing the construction cost.
【０００５】そこで本発明は、構成部品数が少なくて坑
口への取付けが容易であり、しかも掘削機の据え付け発
進のための準備作業が簡素化でき、地盤の固化や壁体の
造成を簡単化することをも可能とする、新規な坑口封止
装置を提供することを目的とした。Therefore, the present invention has a small number of constituent parts and can be easily mounted to a wellhead, and can further simplify the preparation work for starting the installation of the excavator, simplifying the solidification of the ground and the construction of the wall body. The purpose of the present invention is to provide a novel wellhead sealing device that enables the above.
【０００６】[0006]
【課題を解決するための手段】かかる目的を達成するこ
とができる坑口封止装置は、坑口に封止固定した円筒型
部材の内周面に沿ってゴム製中空のシール材を周設する
と共に該シール材の頭部と尾部との隣接部をゴム質充填
材により接合し、中空部に圧入された流体により膨張し
た前記シール材により前記円筒型部材内空間を地盤内に
向かって貫通する円筒体の外周面と前記円筒型部材内面
との間を摺動可能に封止したことを特徴とするものであ
る。A wellhead sealing device capable of achieving the above object is such that a hollow rubber seal material is provided along the inner peripheral surface of a cylindrical member which is fixedly sealed at the wellhead. A cylinder in which a head portion and a tail portion of the sealing material are joined to each other by a rubber filler and the sealing material expanded by a fluid press-fitted into a hollow portion penetrates the inner space of the cylindrical member toward the ground. The outer peripheral surface of the body and the inner surface of the cylindrical member are slidably sealed.
【０００７】ここで円筒型部材に対して摺動可能に封止
される円筒体は、坑口から地盤内に向かって貫入するも
のであり、坑孔掘削機又は坑孔掘削機の外面に嵌着され
た環状部材のいずれであってもよく、またこれに類する
管状体であってもよい。Here, the cylindrical body slidably sealed with respect to the cylindrical member penetrates into the ground from the wellhead and is fitted on the outer surface of the wellhole excavator or the wellhole excavator. It may be any of the annular members described above, or may be a tubular body similar to this.
【０００８】かかる本発明の坑口封止装置を更に図１〜
４によって詳細に説明するが、１は坑口に造成されたコ
ンクリート壁体である。この壁体１には、後に掘削機を
導入するための坑口となる凹部１ａをはつり工事によっ
て形成し、周囲にアンカー２ａを植設した円筒型部材２
を取り付けたうえ、壁体１と円筒型部材２との間にコン
クリートモルタルを注入して封止固定してある。その際
に封止装置の加圧試験を行うに使用する圧力ホース３な
どを埋設するなどしておくことができる。なお、Ａは耐
圧試験装置である。The wellhead sealing device of the present invention is further illustrated in FIGS.
As will be described in detail with reference to 4, reference numeral 1 is a concrete wall body formed in the wellhead. A cylindrical member 2 in which a recess 1a, which will be a pit for introducing an excavator later, is formed in the wall body 1 by a hanging work, and an anchor 2a is planted around the recess.
, And concrete mortar is injected between the wall 1 and the cylindrical member 2 to seal and fix. At that time, the pressure hose 3 or the like used for performing the pressure test of the sealing device can be buried. In addition, A is a pressure resistance test apparatus.
【０００９】円筒型部材２の内面には環状板２ｂが突設
されており、その環状板２ｂの内方に長尺のゴム製中空
のシール材４が円筒型部材２の内面を一周して更にその
頭部４ａと尾部４ｂとが並ぶように周設され、頭部４ａ
と尾部４ｂとの隣接部間には例えばウレタンゴムやシリ
コーンゴムなどのゴム質充填材５を充填して、隙間が出
来ないように接合してある。なお、６はシール材４を円
筒型部材２の内面に固定するためのボルトである。An annular plate 2b is provided so as to project from the inner surface of the cylindrical member 2, and a long rubber hollow seal member 4 is formed inside the annular plate 2b so as to go around the inner surface of the cylindrical member 2. Further, the head portion 4a and the tail portion 4b are circumferentially arranged so as to line up, and the head portion 4a
A rubber filling material 5 such as urethane rubber or silicone rubber is filled between the adjacent portions of the tail portion 4b and the tail portion 4b so that no gap is formed. In addition, 6 is a bolt for fixing the sealing material 4 to the inner surface of the cylindrical member 2.
【００１０】ここでシール材４の内部空間４ｃは頭部４
ａに取り付けた流体ホース４ｄと連絡しており、流体ホ
ース４ｄを通じて例えば圧力空気などをこの内部空間４
ｃに導入してシール材４全体を膨張させ、また排出して
全体を収縮させることにより、円筒型部材２の内部に嵌
入した掘削機の外面又はこれに設けた円筒型スリーブ８
などの外面と円筒型部材２の内面との間を自由に封止又
は開放できるようになっている。なお図におけるＢはシ
ール加圧装置である。Here, the internal space 4c of the sealing material 4 is the head 4
It communicates with the fluid hose 4d attached to a, and through the fluid hose 4d, for example, pressurized air is supplied to the internal space 4d.
c to introduce the sealing material 4 into the cylinder c to expand it, and to discharge it to contract the whole, so that the outer surface of the excavator fitted inside the cylindrical member 2 or the cylindrical sleeve 8 provided on the outer surface of the excavator.
The outer surface and the inner surface of the cylindrical member 2 can be freely sealed or opened. In the figure, B is a seal pressurizing device.
【００１１】[0011]
【作用】本発明の坑口封止装置は、先ず坑口となる部位
に設けた壁体１の一部に凹部１ａを形成して円筒型部材
２を取付けたのち、コンクリートモルタルなどを注入し
て壁体１の周囲と円筒型部材２とを結合し封止する。そ
の後円筒型部材２の内周面に沿ってゴム製中空のシール
材４を取り付け、これに掘削機の先端などの円筒体８を
位置合わせしたのち挿入し、次いでシール材４に空気、
水、又は油などの適宜の流体を圧入して膨張させ、円筒
型部材２と円筒体８との間を封止する。その後圧力ホー
ス３から加圧水などを注入して耐圧試験を行い、安全を
確かめたのちに掘削機を発進させて、壁体１の残りを破
壊すると同時に地盤の掘削を開始する。According to the wellhead sealing device of the present invention, first, a concave portion 1a is formed in a part of a wall body 1 provided at a portion to be a wellhead, a cylindrical member 2 is attached thereto, and then concrete mortar or the like is poured into the wall. The periphery of the body 1 and the cylindrical member 2 are joined and sealed. After that, a rubber-made hollow seal material 4 is attached along the inner peripheral surface of the cylindrical member 2, a cylinder body 8 such as the tip of an excavator is aligned with this, and then inserted, and then the seal material 4 is filled with air,
An appropriate fluid such as water or oil is press-fitted and expanded to seal between the cylindrical member 2 and the cylindrical body 8. After that, pressurized water or the like is injected from the pressure hose 3 to perform a pressure resistance test, and after confirming the safety, the excavator is started to destroy the rest of the wall body 1 and simultaneously start excavation of the ground.
【００１２】この際掘削機を移動させるに当たっては、
シール材４に圧入する流体圧を加減することによって移
動を容易にすることができ、また地盤の水圧が高いとき
はシール材４に圧入する流体圧を高めることにより止水
効果を上げることもできる。そして更に掘削機に代わっ
て管体などを設置しようとするときは、空気などの加圧
流体に代えて硬化性樹脂などを圧入することにより、簡
単に永久止水構造を形成することができる。At this time, when moving the excavator,
Movement can be facilitated by adjusting the fluid pressure that is press-fitted into the sealing material 4, and when the ground water pressure is high, the water-stopping effect can be enhanced by increasing the fluid pressure that is pressed into the sealing material 4. . When a pipe or the like is to be installed instead of the excavator, a permanent water blocking structure can be easily formed by press-fitting a curable resin or the like instead of a pressurized fluid such as air.
【００１３】[0013]
【発明の効果】本発明の坑口封止装置は構成する部材の
構成が簡単であって部品数も少なく、坑口への取付けが
極めて容易である。その上掘削装置の据付けが簡単であ
るうえ据え付けたのち直ちに耐圧試験が実施でき、しか
も耐圧試験終了後には直ちに掘削作業を開始することが
できる。そのため従来は掘削装置の取付け前に行ってい
た壁体の除去作業を省略することができるばかりでな
く、壁体の除去作業の安全を確保するために実施してい
た地盤のグラウト処理も省略できることとなり、結果と
して作業工数の低減と工期の短縮が図れ、極めて経済的
である。EFFECT OF THE INVENTION The wellhead sealing device of the present invention has a simple structure of the constituent members, has a small number of parts, and is extremely easily attached to the wellhead. In addition, the excavator can be installed easily, and the pressure resistance test can be performed immediately after the installation, and the excavation work can be started immediately after the pressure resistance test is completed. Therefore, it is possible not only to omit the removal work of the wall body that was conventionally performed before installing the excavator, but also to omit the grout treatment of the ground that was performed to ensure the safety of the removal work of the wall body. As a result, the number of work steps and the work period can be shortened, which is extremely economical.
【００１４】しかもこのような本発明の坑口封止装置
は、場所や寸法の大小に係わらず利用することが可能で
あり、トンネル等の坑道掘削に適用できるばかりでなく
坑井掘削に際しても全く同様に利用できる特長もある。Moreover, such a wellhead sealing device of the present invention can be used regardless of the location or size, and is applicable not only to tunnel excavation but also to wellbore excavation. There are also features that can be used for.
【図１】本発明の坑口封止装置の構成を示す概念図であ
る。FIG. 1 is a conceptual diagram showing a configuration of a wellhead sealing device of the present invention.
【図２】本発明の坑口封止装置における円筒型部材とシ
ール材との組立状態を示す斜視図である。FIG. 2 is a perspective view showing an assembled state of a cylindrical member and a sealing material in the wellhead sealing device of the present invention.
【図３】本発明の坑口封止装置における封止状態を示す
部分断面図である。FIG. 3 is a partial cross-sectional view showing a sealed state in the wellhead sealing device of the present invention.
【図４】本発明の坑口封止装置の取付状態を示す断面図
である。FIG. 4 is a sectional view showing a mounting state of the wellhead sealing device of the present invention.
【図５】従来技術による坑口封止装置の部分断面図であ
る。FIG. 5 is a partial sectional view of a wellhead sealing device according to the prior art.
【図６】従来技術による坑口封止装置の部分斜視図であ
る。FIG. 6 is a partial perspective view of a wellhead sealing device according to the prior art.
１ 壁体 １ａ 凹部 ２ 円筒型部材 ２ａ アンカー ２ｂ 環状板 ３ 圧力ホース ４ シール材 ４ａ 頭部 ４ｂ 尾部 ４ｃ 内部空間 ４ｄ 流体ホース ５ 充填材 ６ ボルト ８ 円筒型スリーブ Ａ 耐圧試験装置 Ｂ シール加圧装置 ａ 環状体 ｂ フランジ ｃ シートパッキン ｄ フラップ付金具 ｅ フラップ 1 Wall 1a Recess 2 Cylindrical Member 2a Anchor 2b Annular Plate 3 Pressure Hose 4 Sealant 4a Head 4b Tail 4c Internal Space 4d Fluid Hose 5 Filler 6 Bolt 8 Cylindrical Sleeve A Pressure Tester B Seal Pressurizer a Annular body b Flange c Sheet packing d Metal fitting with flap e Flap
Claims (2)
に沿ってゴム製中空のシール材を周設すると共に該シー
ル材の頭部と尾部との隣接部をゴム質充填材により接合
し、中空部に圧入された流体により膨張した前記シール
材により前記円筒型部材内空間を地盤内に向かって貫通
する円筒体の外周面と前記円筒型部材内面との間を摺動
可能に封止したことを特徴とする坑口封止装置。1. A hollow rubber seal material is provided around an inner peripheral surface of a cylindrical member sealed and fixed to a wellhead, and a head portion and a tail portion of the seal material are adjacent to each other by a rubber filler. The sealing member that is joined and expanded by the fluid pressed into the hollow portion is slidable between the outer peripheral surface of the cylindrical body that penetrates the inner space of the cylindrical member toward the ground and the inner surface of the cylindrical member. A wellhead sealing device characterized by being sealed.
面に嵌着された環状部材のいずれかである請求項１記載
の坑口封止装置。2. The wellhead sealing device according to claim 1, wherein the cylindrical body is either a wellbore excavator or an annular member fitted to the outer surface of the wellbore excavator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14748593A JP2636139B2 (en) | 1993-06-18 | 1993-06-18 | Wellhead sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14748593A JP2636139B2 (en) | 1993-06-18 | 1993-06-18 | Wellhead sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH074174A true JPH074174A (en) | 1995-01-10 |
| JP2636139B2 JP2636139B2 (en) | 1997-07-30 |
Family
ID=15431464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14748593A Expired - Fee Related JP2636139B2 (en) | 1993-06-18 | 1993-06-18 | Wellhead sealing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2636139B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895577A (en) * | 2015-05-29 | 2015-09-09 | 沈阳理工大学 | Water-seal boring shield head used for rock breaking by adopting electric discharge |
| CN105019910A (en) * | 2015-07-27 | 2015-11-04 | 北京市市政四建设工程有限责任公司 | Shield tail sealing device and shield tunneling machine |
| DE202015006889U1 (en) | 2014-10-03 | 2016-02-02 | Murakami Corporation | rearview mirror |
-
1993
- 1993-06-18 JP JP14748593A patent/JP2636139B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202015006889U1 (en) | 2014-10-03 | 2016-02-02 | Murakami Corporation | rearview mirror |
| CN104895577A (en) * | 2015-05-29 | 2015-09-09 | 沈阳理工大学 | Water-seal boring shield head used for rock breaking by adopting electric discharge |
| CN104895577B (en) * | 2015-05-29 | 2017-03-08 | 沈阳理工大学 | A kind of electric discharge broken rock tunnels shield head with water-stop |
| CN105019910A (en) * | 2015-07-27 | 2015-11-04 | 北京市市政四建设工程有限责任公司 | Shield tail sealing device and shield tunneling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2636139B2 (en) | 1997-07-30 |
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Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19970225 |
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| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| LAPS | Cancellation because of no payment of annual fees |