JPH10140973A - Sealing device for arrival port of tunnel - Google Patents
Sealing device for arrival port of tunnelInfo
- Publication number
- JPH10140973A JPH10140973A JP30030696A JP30030696A JPH10140973A JP H10140973 A JPH10140973 A JP H10140973A JP 30030696 A JP30030696 A JP 30030696A JP 30030696 A JP30030696 A JP 30030696A JP H10140973 A JPH10140973 A JP H10140973A
- Authority
- JP
- Japan
- Prior art keywords
- tunnel
- sealing
- retaining wall
- annular
- water
- 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.)
- Withdrawn
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 61
- 239000013013 elastic material Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 22
- 238000010276 construction Methods 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 239000011210 fiber-reinforced concrete Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000701 coagulant Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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)
- Bulkheads Adapted To Foundation Construction (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、シールド工法によ
るトンネル掘削に際して、掘削機が既設のトンネルとの
接続地点、或いはトンネル建設の中間地点に設けた縦坑
や終点の坑口位置に到達したときなどに、かかる到達地
点に設けた土留め壁体と、土留め壁体に貫入したトンネ
ル掘削機との間隙を確実に封止する装置に関する。BACKGROUND OF THE INVENTION The present invention relates to a method for excavating a tunnel by a shield method when the excavator arrives at a connection point with an existing tunnel, a vertical shaft provided at an intermediate point of tunnel construction, or a wellhead position at an end point. In addition, the present invention relates to a device for reliably sealing a gap between a retaining wall provided at such an arrival point and a tunnel excavator penetrating the retaining wall.
【０００２】[0002]
【従来の技術】シールド工法によってトンネルを掘削す
るときは、その到達予定地点に設けた土留め壁体に坑口
を設けてトンネル本体と接続しなければならない。そし
て、トンネルを土圧や湧水などから保護するために覆工
として設けられる内壁体と、土留め壁体とを接続する際
には、ややもすると土砂の流入や出水などの事故が発生
する危険があった。2. Description of the Related Art When a tunnel is excavated by a shield method, a wellhead must be provided on a retaining wall provided at a point where the tunnel is to be reached, and the tunnel must be connected to the tunnel body. Then, when connecting the inner wall body provided as a lining to protect the tunnel from earth pressure and spring water and the retaining wall body, accidents such as inflow of sediment and flooding may occur slightly There was danger.
【０００３】そこで従来は、図４に示すようにトンネル
４の先端が土留め壁体１に到達する前に、予め土留め壁
体１の背後の地盤Ｅに、固化用薬液を注入するなどの方
法によって地盤の安定化を行っておいて、その安定化地
帯Ｇをシールド式トンネル掘削機３によって掘進し、土
留め壁体１の裏面までトンネル４を到達させたのち、安
定化地帯Ｇとトンネルの内壁の覆工４ａやシールドの外
面との間に、止水材料等を充填するなどの方法により止
水処理をしていた。その後土留め壁体１を表面側からハ
ツってトンネルとほぼ同径の開口部を形成し、掘削機３
の前面を露出させてから、掘削機３を土留め壁体１内に
貫入させたうえ、シールドの内部の装置類を分解搬出す
ると共に、シールド筒３ａと土留め壁体１とをコンクリ
ート等によって結合し、更にシールド筒３ａの内面にも
覆工を施して、土留め壁体１とトンネル４との接続を完
成させる方法が主として採用されていた。Conventionally, as shown in FIG. 4, before the tip of the tunnel 4 reaches the retaining wall 1, a solidifying chemical solution is injected into the ground E behind the retaining wall 1 in advance. After the ground is stabilized by the method, the stabilized zone G is excavated by the shield type tunnel excavator 3 and the tunnel 4 reaches the back surface of the retaining wall body 1. The water stopping process is performed by filling a water stopping material or the like between the lining 4a of the inner wall and the outer surface of the shield. Thereafter, the retaining wall 1 is cut from the surface side to form an opening having substantially the same diameter as the tunnel.
After exposing the front of the excavator 3, the excavator 3 is penetrated into the retaining wall 1, and the devices inside the shield are disassembled and carried out, and the shield cylinder 3a and the retaining wall 1 are separated by concrete or the like. A method has been mainly adopted in which the connection between the earth retaining wall body 1 and the tunnel 4 is completed by coupling and further lining the inner surface of the shield cylinder 3a.
【０００４】[0004]
【発明が解決しようとする課題】このような従来方法に
おいては、土留め壁体の背後の地盤を、薬液注入などの
方法により広い範囲で安定化することが必要であった。
そのため、安定化の効果を確認するのに多額の費用を必
要とするうえ、事故発生の予防も万全ではなかった。そ
のうえ土留め壁体に開口部を形成するためのハツり作業
量が多く、多大の労力と長い工期がかかるという問題も
あった。In such a conventional method, it is necessary to stabilize the ground behind the retaining wall over a wide range by a method such as injection of a chemical solution.
Therefore, a large amount of money was required to confirm the effect of stabilization, and accident prevention was not perfect. In addition, there is also a problem that a large amount of filing work is required to form an opening in the earth retaining wall, and a large amount of labor and a long construction period are required.
【０００５】そこで本発明は、シールド工法によるトン
ネル掘削の到達地点に設けた土留め壁体とトンネル本体
とを接続するに際して、土留め壁体近傍の地盤に対する
土質安定化の省略と、作業の大幅な簡略化、及び大幅な
安全化が図れ、しかも工期の短縮と工事費用の低減とを
達成できる、安全なトンネル到達口の封止装置を提供す
ることを目的とした。[0005] Therefore, the present invention eliminates the need for stabilization of the soil near the earth retaining wall, and a great deal of work when connecting the earth retaining wall provided at the tunnel excavation arrival point by the shield method and the tunnel body. It is an object of the present invention to provide a safe tunnel entrance sealing device that can achieve simple simplification and great safety, and can achieve a shortened construction period and a reduced construction cost.
【０００６】[0006]
【課題を解決するための手段】このような目的を達成す
るため、本発明のトンネル到達口の封止装置は、トンネ
ル到達予定位置に築造した土留め壁体の前面に、トンネ
ル掘削機より大径の筒状体の後端部を環状継手部材を介
して水密に結合し、且つ該筒状体の前端部に封止部材を
水密に結合してなり、前記筒状体の少なくとも中央部分
に形成された膨大部の内部空間に、内方に向かって膨張
可能な環状封止体を設けて構成したものである。In order to achieve the above object, a sealing device for a tunnel reaching port according to the present invention is provided on a front surface of an earth retaining wall constructed at a position expected to reach a tunnel, in a larger size than a tunnel excavator. The rear end of the cylindrical body having a diameter is water-tightly connected via an annular joint member, and a sealing member is water-tightly connected to the front end of the cylindrical body, and at least a central portion of the cylindrical body is provided. An annular sealing body that can expand inward is provided in the internal space of the formed enlarged part.
【０００７】かかる本発明のトンネル到達口の封止装置
において、前記土留め壁体はトンネル掘削機による掘削
可能な材料により構成されていると、トンネル到達部位
に坑口を形成する作業の能率を著しく高めることができ
る。また土留め壁体の前面に取り付けられる筒状体の内
面に設けられた環状封止体が、ゴム状弾性材料からなる
中空体か、またはシート体であると、その中空部分又は
背後空間などに加圧流体などを送入して膨張させること
によって、前記筒状体の内部に進入してきたトンネル掘
削機の周囲からの漏水を、その程度に応じて容易に封止
することができる。更にこのようなゴム状弾性材料から
なる環状封止体が前記筒状体と同心的な環状襞を有して
いると、環状封止体の膨張量を大きく取ることができ、
広い間隙が生じても確実な封止効果が得られる。In the tunnel entrance sealing device of the present invention, when the earth retaining wall is made of a material that can be excavated by a tunnel excavator, the efficiency of the operation of forming the entrance at the tunnel arrival site is significantly improved. Can be enhanced. Further, when the annular sealing body provided on the inner surface of the cylindrical body attached to the front surface of the retaining wall body is a hollow body made of a rubber-like elastic material or a sheet body, the hollow part or the back space or the like is provided. By feeding and expanding the pressurized fluid or the like, water leakage from around the tunnel excavator that has entered the inside of the tubular body can be easily sealed in accordance with the degree thereof. Furthermore, when the annular sealing body made of such a rubber-like elastic material has an annular fold concentric with the cylindrical body, the amount of expansion of the annular sealing body can be increased,
Even if a wide gap is generated, a reliable sealing effect can be obtained.
【０００８】[0008]
【発明の実施の形態】本発明のトンネル到達口の封止装
置を、図１〜３によって説明する。本発明のトンネル到
達口の封止装置における土留め壁体１は、例えばトンネ
ルの中間地点に形成された縦坑底部などの、作業空間を
囲んで設けられた鉄筋１ａ入りの壁体である。そして、
土留め壁体１のトンネル到達口形成予定部位は、鉄筋の
代わりに、例えばステンレスファイバー１ｂなどで強化
された、繊維補強コンクリートを充填して形成されて、
トンネル掘削機３によって掘削できるようにしてある。
更には、繊維補強コンクリートの内部などに、所望によ
りトンネル掘削機３の進入位置を検出するためのセンサ
などを取り付けた環状体などを、トンネル到達口形成予
定位置を囲むように埋設しておくこともできる。DESCRIPTION OF THE PREFERRED EMBODIMENTS A sealing device for a tunnel arrival port according to the present invention will be described with reference to FIGS. The earth retaining wall 1 in the sealing device for a tunnel entrance of the present invention is a wall containing a reinforcing bar 1a provided around a working space, such as a shaft bottom formed at an intermediate point of the tunnel. And
The portion of the retaining wall 1 where the tunnel reaching port is to be formed is formed by filling fiber-reinforced concrete reinforced with, for example, stainless steel fiber 1b instead of the reinforcing bar,
It can be excavated by a tunnel excavator 3.
Further, an annular body or the like to which a sensor or the like for detecting the entry position of the tunnel excavator 3 is attached as required to be embedded in the fiber reinforced concrete or the like so as to surround the tunnel arrival port planned position. Can also.
【０００９】土留め壁体１のトンネル到達口形成予定部
位の表面側には、トンネル到達口形成予定部位を囲むよ
うに、環状継手部材２の後端部がアンカーボルト２ａな
どによって、水などが漏れることのないように取り付け
られる。この環状継手部材２は、トンネル掘削機３がそ
の内部を充分の余裕を持って貫通できる径を有している
もので、その前端部にはフランジ２ｂが形成され、これ
にはトンネルの軸線と平行になるように複数のボルト２
ｃが突設してある。これらのボルト２ｃは、予定される
トンネルの中心軸に対して、例えば３°〜１５°間隔な
どとなるよう、均等に且つ回転対称的に設けられてい
る。On the surface of the retaining wall body 1 at the site where the tunnel arrival port is to be formed, water or the like is provided by the anchor bolt 2a or the like at the rear end of the annular joint member 2 so as to surround the site where the tunnel arrival port is to be formed. Attached so that it does not leak. The annular joint member 2 has a diameter that allows the tunnel excavator 3 to penetrate the inside thereof with a sufficient margin, and has a flange 2b formed at a front end thereof. Multiple bolts 2 so that they are parallel
c is protruding. These bolts 2c are provided evenly and rotationally symmetrically at an interval of, for example, 3 ° to 15 ° with respect to the center axis of the planned tunnel.
【００１０】一方、前記の環状継手部材２のフランジ２
ｂに結合される、筒状体５の後端部に形成されたフラン
ジ５ａには、前記のボルト２ｃにそれぞれ嵌合可能な長
孔５ｂが、それぞれの長径が互いに平行となるように設
けてある。そのため、筒状体５はその軸線の周りに適宜
回転した位置で、パッキン８を介してボルト２ｃにより
環状継手部材２に結合できるうえ、結合した姿勢のまま
筒状体５を長孔５ｂの長径方向に平行移動させることが
できるようになっている。従って、土留め壁体１に対し
て進入してきたトンネル掘削機３の軸心位置と、環状継
手部材２の軸心位置との間にずれが生じたときに、その
ずれの方向とずれの大きさに応じて、筒状体５を回転し
且つ軸に直角方向に移動させることによって、トンネル
掘削機３と筒状体５との軸心位置をほぼ正確に合致させ
ることができる。On the other hand, the flange 2 of the annular joint member 2
In a flange 5a formed at the rear end of the tubular body 5 and connected to the bolt b, long holes 5b that can be respectively fitted to the bolts 2c are provided so that their long diameters are parallel to each other. is there. Therefore, the cylindrical body 5 can be coupled to the annular joint member 2 by the bolt 2c via the packing 8 at a position appropriately rotated around the axis thereof, and the cylindrical body 5 is inserted into the elongated hole 5b while maintaining the coupled posture. It can be translated in the direction. Therefore, when a deviation occurs between the axial position of the tunnel excavator 3 that has entered the retaining wall 1 and the axial position of the annular joint member 2, the direction of the deviation and the magnitude of the deviation Accordingly, by rotating the tubular body 5 and moving the tubular body 5 in a direction perpendicular to the axis, the axial center positions of the tunnel excavator 3 and the tubular body 5 can be almost exactly matched.
【００１１】この筒状体５の内径は、トンネル掘削機３
のシールド筒３ａの外径より少なくも大であるように形
成されているが、筒状体５の中央部分はその後端部より
も径が大きい膨大部５ｃとなっており、その内面には環
状封止体６が周設されている。従って、環状封止体６は
その取り付け部分も含めてすべてが、膨大部５ｃで形成
された膨大した内部空間内に収容されていて、後端部の
内周面の位置より内方に突出する部分は無いように構成
されている。このように筒状体５の内径がトンネル掘削
機３の外径より大きく、また環状封止体６が膨大部５ｃ
の膨大空間内に収容されているために、土留め壁体１の
前面から進出してきたトンネル掘削機３は、その軸心が
筒状体５の軸心と多少のずれがあっても、何ら支障なく
筒状体５の内部まで進入することができる。The inner diameter of the tubular body 5 is
Is formed so as to be at least larger than the outer diameter of the shield cylinder 3a, but the central part of the cylindrical body 5 is an enlarged part 5c whose diameter is larger than its rear end, and the inner surface has an annular shape. A sealing body 6 is provided around. Therefore, the entire annular sealing body 6 including the mounting portion is housed in the enormous internal space formed by the expanding portion 5c, and projects inward from the position of the inner peripheral surface at the rear end. It is configured so that there are no parts. As described above, the inner diameter of the cylindrical body 5 is larger than the outer diameter of the tunnel excavator 3, and the annular sealing body 6 has an enlarged portion 5c.
The tunnel excavator 3 that has advanced from the front of the retaining wall 1 because it is accommodated in the huge space of It is possible to enter the inside of the tubular body 5 without any trouble.
【００１２】ここで上記の環状封止体６は、例えばゴム
状弾性材料から形成されたチューブ状の中空体や、筒状
のゴム状弾性シートを折り返して前後の縁部を接合する
などにより中空体状に形成したものなどが、好ましく用
いられるが、筒状のゴム状弾性シートの前縁部と後縁部
とを、それぞれ前記の膨大部５ｃの前後の内面に接合固
定することによって、膨大部５ｃとシート状の環状封止
体６との間に中空部分を形成したものであってもよい。
更にはかかる環状封止体６は、その前縁部と後縁部との
間に筒状体５と同心的な周方向の環状襞６ａを備えた、
例えば蛇腹状に形成されたものなどが望ましく、このよ
うな環状襞６ａが存在すれば、前記の環状封止体６の中
空部分に加圧流体を圧入することによって、環状封止体
６を内方に大きく膨出させることが容易となる。Here, the annular sealing body 6 is formed by, for example, a tubular hollow body formed of a rubber-like elastic material or a tubular rubber-like elastic sheet which is folded back to join the front and rear edges. A body-shaped member or the like is preferably used, but the front and rear edges of the tubular rubber-like elastic sheet are joined and fixed to the inner surfaces before and after the expanding portion 5c, respectively. A hollow portion may be formed between the portion 5c and the sheet-shaped annular sealing body 6.
Further, the annular sealing body 6 has a circumferential annular fold 6a concentric with the tubular body 5 between the front edge and the rear edge thereof.
For example, a bellows-like one is desirable. If such an annular fold 6a is present, pressurized fluid is press-fitted into the hollow portion of the annular sealing body 6 so that the annular sealing body 6 is It becomes easy to swell greatly in the direction.
【００１３】更に、上記の筒状体５の前端部にはフラン
ジ５ｄが設けてあり、これに着脱可能な蓋状の封止部材
７が設けられている。かかる封止部材７を取り付けたと
きには、土留め壁体１と、環状継手部材２、筒状体５、
及び封止部材７とに囲まれた空間が密封された状態とな
るので、この空間の内部の圧力の変化や出水などの有無
を調べるための検知ノズル７ａなどを封止部材７に設け
ておくと、環状封止体６による封止が充分でない場合な
どに、検知ノズル７ａを使用して出水状況を確認するこ
とにより、地盤補強などのために追加の薬剤注入が必要
か否かを判断することができる。Further, a flange 5d is provided at the front end of the tubular body 5, and a detachable lid-like sealing member 7 is provided at the flange 5d. When the sealing member 7 is attached, the retaining wall 1, the annular joint member 2, the cylindrical body 5,
Since the space surrounded by the sealing member 7 and the sealing member 7 is in a sealed state, the sealing member 7 is provided with a detection nozzle 7a and the like for checking a change in pressure inside the space and the presence or absence of water. In the case where the sealing by the annular sealing body 6 is not sufficient, the state of water discharge is checked using the detection nozzle 7a to determine whether or not additional chemical injection is necessary for ground reinforcement or the like. be able to.
【００１４】更にこのように構成された本発明のトンネ
ル到達口の封止装置においては、土留め壁体１を貫通し
て表面側から地盤Ｅ側に達する通液孔１ｃなどを設ける
ことができる。かかる通液孔１ｃを開放することによ
り、地盤内の水圧や水量などの検出を行うことができ、
更に必要に応じて、地盤安定用や止水用の薬剤などを注
入するのに利用することもできる。Further, in the sealing device of the tunnel reaching port of the present invention thus configured, there can be provided a liquid passage hole 1c which penetrates the retaining wall 1 and extends from the surface side to the ground E side. . By opening the liquid passage hole 1c, it is possible to detect the water pressure, the amount of water, and the like in the ground,
Further, it can be used for injecting a ground stabilizing or water stopping chemical as required.
【００１５】このような本発明のトンネル到達口の封止
装置を設けた土留め壁体１に、地盤Ｅ側からシールド式
トンネル掘削機３が前進して来たとき、先ず安定化処理
が施されていない地盤Ｅ内を掘進して土留め壁体１の裏
面側に到達するが、更にトンネル掘削機３を前進させ
て、土留め壁体１の繊維補強コンクリート部分をそのま
ま掘削する。この際、前以ってトンネル掘削機３の軸心
位置とその予定位置とのずれを適宜な方法で検出し、環
状継手部材２の取付位置を修正しておくこともできる。
そして、トンネル掘削機３の軸心位置と筒状体５の軸心
位置が合致するように、環状継手部材２にパッキン８を
介して筒状体５を結合し、更に筒状体５の前端部に封止
部材７を取り付ける。When the shield-type tunnel excavator 3 advances from the ground E side to the earth retaining wall 1 provided with the above-described tunnel arrival port sealing device of the present invention, first, a stabilization process is performed. After digging in the ungrounded ground E and reaching the back side of the retaining wall 1, the tunnel excavator 3 is further advanced to excavate the fiber-reinforced concrete portion of the retaining wall 1 as it is. At this time, the deviation between the axial center position of the tunnel excavator 3 and its expected position can be detected in advance by an appropriate method, and the mounting position of the annular joint member 2 can be corrected.
Then, the tubular body 5 is connected to the annular joint member 2 via the packing 8 so that the axial center position of the tunnel excavator 3 and the axial center position of the tubular body 5 coincide with each other. The sealing member 7 is attached to the part.
【００１６】この状態から更にトンネル掘削機３が前進
すると、トンネル掘削機３の前部が土留め壁体１を貫通
して環状継手部材２内に進入する。このとき地盤Ｅ内の
水圧が高いと筒状体５内にも湧水が侵入するので、検知
ノズル６ａを開いて水圧、水質、水量などを調べ、必要
に応じてトンネル到達口付近の止水工事を実施する。そ
して安全を確認したのち更にトンネル掘削機３を前進さ
せ、その前部を筒状体５内に進入させてから、環状封止
体６を圧力水等により膨張させてシールド筒３ａの外面
に密着させ、筒状体５内面とシールド筒３ａ外面との隙
間を環状封止体６により封止する。When the tunnel excavator 3 further advances from this state, the front portion of the tunnel excavator 3 penetrates through the retaining wall 1 and enters the annular joint member 2. At this time, if the water pressure in the ground E is high, the spring water will also enter the cylindrical body 5, so the detection nozzle 6a is opened to check the water pressure, water quality, water amount, etc., and if necessary, to stop the water near the tunnel arrival port. Implement construction work. Then, after confirming the safety, the tunnel excavator 3 is further advanced, and the front part thereof is advanced into the cylindrical body 5, and then the annular sealing body 6 is expanded with pressurized water or the like to be in close contact with the outer surface of the shield cylinder 3a. Then, the gap between the inner surface of the cylindrical body 5 and the outer surface of the shield cylinder 3a is sealed by the annular sealing body 6.
【００１７】こうしてシールド筒３ａ外側の封止が完成
したのち、必要に応じて通液孔１ｃなどを用いて凝固剤
の注入などの止水工事を行い、トンネル到達口とトンネ
ルの覆工４ａとの接続部分の封止を補強する。そして検
知ノズル７ａにより封止状態を確認してから封止部材７
を取り外し、シールド筒３ａの内部から掘削用装置など
を分解して搬出する。その後シールド筒３ａと土留め壁
体１とを結合したうえ、コンクリートで封止するなどの
方法でシールド筒３ａを固定し、その内部にトンネル４
の内壁と同様な覆工４ａを施して、土留め壁体１とトン
ネル４との接続を完成させる。After the sealing of the outside of the shield cylinder 3a is completed in this way, if necessary, water-stopping work such as injection of a coagulant is performed by using the liquid passage hole 1c or the like, so that the tunnel reaching port and the tunnel lining 4a are formed. To reinforce the sealing of the connection part. After the sealing state is confirmed by the detection nozzle 7a, the sealing member 7
Is removed, and a device for excavation is disassembled from the inside of the shield tube 3a and carried out. After that, the shield cylinder 3a and the retaining wall 1 are joined, and the shield cylinder 3a is fixed by sealing with concrete or the like.
A lining 4a similar to that of the inner wall is applied to complete the connection between the retaining wall 1 and the tunnel 4.
【００１８】[0018]
【発明の効果】本発明のトンネル到達口の封止装置は、
土留め壁体の背後の地盤に前もって安定化処理を施すこ
となくして、安全にトンネル掘削機で土留め壁体を掘削
して貫通口を形成することができ、しかもその際のトン
ネル到達口とトンネル掘削機３との間で精度が高い封止
が容易に達成できるので、出水や土砂の流出は確実に防
止される。そのため、土留め壁体へのトンネル到達口形
成作業を安全かつ簡単に実施できるばかりでなく、更に
工事期間の短縮が図れる効果がある。そして予備的な地
盤安定化用の薬剤が不要となることと相まって、工事費
用を大幅に低減化できる効果がある。According to the present invention, there is provided a device for sealing a tunnel reaching port,
Without performing pre-stabilization treatment on the ground behind the retaining wall, the tunnel excavator can safely excavate the retaining wall to form a through hole, and at the same time, the tunnel entrance Since high-precision sealing with the tunnel excavator 3 can be easily achieved, flooding and outflow of earth and sand are reliably prevented. Therefore, not only the work of forming the tunnel reaching port on the earth retaining wall can be performed safely and easily, but also the effect of shortening the construction period can be achieved. In addition to the fact that a preliminary ground stabilizing agent is not required, there is an effect that the construction cost can be significantly reduced.
【図１】本発明のトンネル到達口の封止装置を備えた土
留め壁体と掘進中のトンネルとの関係の説明図である。FIG. 1 is an explanatory diagram showing the relationship between an earth retaining wall provided with a tunnel arrival port sealing device of the present invention and a tunnel during excavation.
【図２】本発明のトンネル到達口の封止装置における環
状継手部材と筒状体との関係を示す外観斜視図である。FIG. 2 is an external perspective view showing a relationship between an annular joint member and a tubular body in the tunnel arrival port sealing device of the present invention.
【図３】本発明のトンネル到達口の封止装置を備えた土
留め壁体をトンネル掘削機が貫通したときの封止状態の
説明図である。FIG. 3 is an explanatory view of a sealing state when a tunnel excavator penetrates an earth retaining wall provided with a tunnel arrival port sealing device of the present invention.
【図４】従来技術による土留め壁体とトンネル到達部と
の接続方法の説明図である。FIG. 4 is an explanatory view of a method of connecting a retaining wall body and a tunnel reaching part according to a conventional technique.
１ 土留め壁体 １ａ 鉄筋 １ｂ ステンレスファイバー １ｃ 通液孔 ２ 環状継手部材 ２ａ アンカーボルト ２ｂ フランジ ２ｃ ボルト ３ トンネル掘削機 ３ａ シールド筒 ４ トンネル ４ａ 覆工 ５ 筒状体 ５ａ フランジ ５ｂ 長孔 ５ｃ 膨大部 ５ｄ フランジ ６ 環状封止体 ６ａ 環状襞 ７ 封止部材 ７ａ 検知ノズル ８ パッキン Ｅ 地盤 Ｇ 安定化地帯 DESCRIPTION OF SYMBOLS 1 Retaining wall 1a Reinforcing bar 1b Stainless fiber 1c Liquid passage 2 Ring joint member 2a Anchor bolt 2b Flange 2c Bolt 3 Tunnel excavator 3a Shield cylinder 4 Tunnel 4a Lining 5 Cylindrical body 5a Flange 5b Long hole 5c Enlarged part 5d Flange 6 Annular sealing body 6a Annular fold 7 Sealing member 7a Detection nozzle 8 Packing E Ground G Stabilized zone
Claims (5)
壁体の前面に、トンネル掘削機より大径の筒状体の後端
部を環状継手部材を介して水密に結合し、且つ該筒状体
の前端部に封止部材を水密に結合してなり、前記筒状体
の少なくとも中央部分に形成された膨大部の内部空間
に、内方に向かって膨張可能な環状封止体を設けたこと
を特徴とする、トンネル到達口の封止装置。1. A rear end portion of a cylindrical body having a diameter larger than that of a tunnel excavator is water-tightly coupled to a front surface of an earth retaining wall constructed at a position expected to reach a tunnel via an annular joint member. A sealing member is joined to the front end of the body in a water-tight manner, and an annular sealing body that can expand inward is provided in the internal space of the enlarged part formed at least in the central part of the tubular body. A sealing device for a tunnel reaching port.
掘削可能な材料により構成されている、請求項１に記載
のトンネル到達口の封止装置。2. The sealing device for a tunnel entrance according to claim 1, wherein the retaining wall is made of a material that can be excavated by a tunnel excavator.
る中空体である、請求項１又は２に記載のトンネル到達
口の封止装置。3. The sealing device for a tunnel reaching port according to claim 1, wherein the annular sealing body is a hollow body made of a rubber-like elastic material.
るシートである、請求項１又は２に記載のトンネル到達
口の封止装置。4. The sealing device for a tunnel reaching port according to claim 1, wherein the annular sealing body is a sheet made of a rubber-like elastic material.
環状襞を有している、請求項３又は４に記載のトンネル
到達口の封止装置。5. The sealing device for a tunnel arrival port according to claim 3, wherein the annular sealing body has an annular fold concentric with the cylindrical body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30030696A JPH10140973A (en) | 1996-11-12 | 1996-11-12 | Sealing device for arrival port of tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30030696A JPH10140973A (en) | 1996-11-12 | 1996-11-12 | Sealing device for arrival port of tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10140973A true JPH10140973A (en) | 1998-05-26 |
Family
ID=17883197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30030696A Withdrawn JPH10140973A (en) | 1996-11-12 | 1996-11-12 | Sealing device for arrival port of tunnel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10140973A (en) |
Cited By (4)
| 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 |
| CN107605504A (en) * | 2017-11-03 | 2018-01-19 | 中交公局第三工程有限公司 | Cliff position double-hole tunnel port structure and method for tunnel construction |
| CN110905536A (en) * | 2019-12-12 | 2020-03-24 | 中铁十二局集团有限公司 | Construction method for receiving complex stratum earth pressure shield in underground excavation tunnel |
| JP6882817B1 (en) * | 2021-01-14 | 2021-06-02 | 六菱ゴム株式会社 | Shield method |
-
1996
- 1996-11-12 JP JP30030696A patent/JPH10140973A/en not_active Withdrawn
Cited By (5)
| 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 |
| 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 |
| CN107605504A (en) * | 2017-11-03 | 2018-01-19 | 中交公局第三工程有限公司 | Cliff position double-hole tunnel port structure and method for tunnel construction |
| CN110905536A (en) * | 2019-12-12 | 2020-03-24 | 中铁十二局集团有限公司 | Construction method for receiving complex stratum earth pressure shield in underground excavation tunnel |
| JP6882817B1 (en) * | 2021-01-14 | 2021-06-02 | 六菱ゴム株式会社 | Shield method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20040203 |