JPH0598892A - Mortar injection device in shield - Google Patents
Mortar injection device in shieldInfo
- Publication number
- JPH0598892A JPH0598892A JP3259098A JP25909891A JPH0598892A JP H0598892 A JPH0598892 A JP H0598892A JP 3259098 A JP3259098 A JP 3259098A JP 25909891 A JP25909891 A JP 25909891A JP H0598892 A JPH0598892 A JP H0598892A
- Authority
- JP
- Japan
- Prior art keywords
- mortar
- shield
- screw
- screws
- injection
- 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
- Lining And Supports For Tunnels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はシールドにおけるモルタ
ル注入装置に関する。FIELD OF THE INVENTION The present invention relates to a mortar injection device in a shield.
【０００２】[0002]
【従来の技術】シールドによるトンネルの掘削において
は、シールドの掘進に伴ないその後方にセグメントを組
立てゝ地山を保護し、このセグメントと地山との間にセ
メントモルタルを注入して固定を図るようにしている。2. Description of the Related Art In excavating a tunnel with a shield, a segment is assembled behind the shield as it is advanced to protect the ground, and cement mortar is injected between the segment and the ground to fix the ground. I am trying.
【０００３】従来のモルタルの注入には、シールドの後
方にセグメントを組立てたあと、そのセグメントの隙間
から地山側へモルタルを注入する手段、またはシールド
の外周面の軸方向にパイプを設け、このパイプからモル
タルを地中に注入する手段が採られている。In the conventional injection of mortar, after assembling a segment behind the shield, means for injecting mortar from the gap between the segments to the natural side, or a pipe is provided in the axial direction of the outer peripheral surface of the shield. The method of injecting mortar into the ground is adopted.
【０００４】[0004]
【発明が解決しようとする課題】しかるにセグメントを
組立てたのちその隙間からモルタルを注入する手段で
は、シールドの掘進と同時にモルタルを注入することは
不可能であり、そのため地山の崩落を招くおそれがあ
る。またパイプ内を通じてモルタルを供給する手段で
は、注入後パイプ内の残留モルタルを排出させるととも
にプラグの役目をするピストンを有するため、清掃時に
おけるピストンのストロークを長く要し、その結果当該
部分の構造が大型となる。さらにパイプによるモルタル
の供給手段では、パイプの内周面にモルタルが付着しや
すく、そのためパイプの内周面にコーティングを施すこ
とが必要であるとともに残留モルタルを洗浄しなければ
ならず、別のパイプを通じて洗浄回路を付設しなければ
ならないなどの問題がある。However, it is impossible to inject mortar at the same time as excavating the shield by means of injecting mortar from the gap after assembling the segments, which may cause collapse of the ground. is there. Further, the means for supplying mortar through the pipe has a piston that serves as a plug while discharging the residual mortar in the pipe after pouring, and therefore requires a long stroke of the piston during cleaning, and as a result, the structure of the portion is It becomes large. Further, in the mortar supply means using a pipe, the mortar is apt to adhere to the inner peripheral surface of the pipe, so that it is necessary to coat the inner peripheral surface of the pipe and the residual mortar must be washed, and another pipe There is a problem that a cleaning circuit must be attached through.
【０００５】本発明はこれに鑑み、コンパクトな構成に
よりモルタルをセグメントの外周面と地山との間にシー
ルドの掘進中に連続して注入することができるシールド
におけるモルタル注入装置を提供することを目的として
なされたものである。In view of this, the present invention provides a mortar injecting device for a shield, which has a compact structure and is capable of continuously injecting mortar between the outer peripheral surface of the segment and the ground while the shield is being dug. It was done for the purpose.
【０００６】[0006]
【課題を解決するための手段】上記従来の技術が有する
問題点を解決するため、本発明は、先端に切羽を有する
筒状のシールド本体の外面軸方向に複数のモルタル注入
路を付設し、この注入路内にスクリューを内挿して回転
駆動自在に形成し、このスクリューの基端部相当位置の
モルタル注入路にモルタル供給路を接続してなり、スク
リューの回転により掘進中にモルタルを地山とセグメン
トとの間に注入するとともにスクリューにより自己清掃
作用をなさしめるようにしたことを特徴とするものであ
る。In order to solve the problems of the above-mentioned prior art, the present invention provides a plurality of mortar injection passages in the axial direction of the outer surface of a cylindrical shield body having a cutting face at its tip, A screw is inserted in this injection path to be rotatably driven, and a mortar supply path is connected to the mortar injection path at the position corresponding to the base end of this screw. It is characterized in that it is injected between the core and the segment, and a self-cleaning action is performed by a screw.
【０００７】[0007]
【作用】モルタル供給路を通じてモルタルを供給しつつ
スクリューを回転駆動すると、モルタルはモルタル注入
路内をスクリュー羽根により搬送されてその注入路の後
端から外部に吐出され、シールドの掘進後にその後方に
組立てられるセグメントと地山との間にモルタルが連続
的に注入される。モルタルの注入を中断するときは、モ
ルタルの供給を停止し、スクリューのみを所定時間空転
させることによりモルタル注入路内のすべてのモルタル
が吐出され、自己清掃作用が行なわれて残留固化するこ
とがない。[Operation] When the screw is rotationally driven while supplying the mortar through the mortar supply passage, the mortar is conveyed inside the mortar injection passage by the screw blades and discharged from the rear end of the injection passage to the outside after the shield is dug. Mortar is continuously injected between the assembled segments and the ground. When the injection of mortar is interrupted, the mortar supply is stopped, and only the screw is idled for a predetermined time so that all the mortar in the mortar injection path is discharged, and the self-cleaning action is performed to prevent residual solidification. ..
【０００８】[0008]
【実施例】以下、本発明を図面に示す実施例を参照して
説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.
【０００９】図１は本発明を適用したシールドの後方部
の一部の断面を示すもので、シールド本体１の外周面軸
方向に複数本（図示の例では等間隔に３本）のモルタル
注入路２，２，２が設けられており、このモルタル注入
路２内にはケーシング３に挿通されたスクリュー４が回
転自在に配設され、このスクリュー４の基端部４ａには
シールド本体１内に設置されたモータ５からベルト、チ
エン等の伝導部材６を介して回転駆動力が与えられるよ
うになっている。FIG. 1 shows a partial cross section of the rear part of a shield to which the present invention is applied. A plurality of mortars (three at regular intervals in the illustrated example) are injected in the axial direction of the outer peripheral surface of the shield body 1. The channels 2, 2 and 2 are provided, and the screw 4 inserted into the casing 3 is rotatably disposed in the mortar injection channel 2, and the base end portion 4 a of the screw 4 is in the shield body 1. A rotational driving force is applied from a motor 5 installed in the vehicle via a conductive member 6 such as a belt or a chain.
【００１０】モルタル注入路２の後端２ａはシールド本
体１の後端１ａと略同じ位置に開口され、シールド本体
１の外周面と略同レベルに設置されるセグメント７と地
山との間にモルタルを注入することができるようになさ
れている。The rear end 2a of the mortar injection path 2 is opened at substantially the same position as the rear end 1a of the shield body 1, and is located between the segment 7 and the ground, which are installed at substantially the same level as the outer peripheral surface of the shield body 1. It is made possible to inject mortar.
【００１１】前記モルタル注入路２の外面形状は、シー
ルド本体１の掘進時に極力抵抗とならないよう図３のよ
うに長手方向両側をなだらかな面２ｂ，２ｂとしてシー
ルド本体１の外周面に連なるように形成されている。The shape of the outer surface of the mortar injection path 2 is such that the shield body 1 is connected to the outer peripheral surface of the shield body 1 as smooth surfaces 2b, 2b in the longitudinal direction as shown in FIG. Has been formed.
【００１２】前記スクリュー４の基端部４ａに近い位置
のモルタル注入路のケーシング３にはモルタル供給路８
が接続され、このモルタル供給路８にはポンプ９が接続
されてこのポンプ９によりモルタルを連続的に供給する
ようになっている。図１において１０はシールド本体１
の推進用ジャッキを示す。In the casing 3 of the mortar injection passage near the base end 4a of the screw 4, the mortar supply passage 8 is provided.
Is connected, and a pump 9 is connected to the mortar supply path 8 so that the mortar is continuously supplied by the pump 9. In FIG. 1, 10 is a shield body 1
Shows a jack for propulsion.
【００１３】本発明は上記構成であるから、ポンプ９を
駆動してモルタル供給路８を通じモルタルを供給しつつ
モータ５によりスクリュー４を回転駆動することにより
モルタルはモルタル注入路２のケーシング３内をスクリ
ュー羽根により後方へ搬送され、モルタル注入路２の後
端２ａから外部に吐出され、シールド本体１の掘進後に
その後方に組立てられるセグメント７と地山との間にモ
ルタルが連続的に注入される。したがってシールド本体
１の掘進と同時施工が可能であり、地山の崩落が確実に
防がれる。Since the present invention has the above-mentioned structure, the motor 5 rotates the screw 4 while supplying the mortar through the mortar supply passage 8 by driving the pump 9 so that the mortar flows inside the casing 3 of the mortar injection passage 2. The mortar is conveyed backward by the screw blades, discharged from the rear end 2a of the mortar injection path 2 to the outside, and mortar is continuously injected between the segment 7 and the ground that are assembled behind the shield main body 1 after the excavation of the shield main body 1. .. Therefore, it is possible to construct the shield body 1 simultaneously with the excavation, and it is possible to reliably prevent the ground from collapsing.
【００１４】モルタルの注入を中断するときは、ポンプ
９を停めてモルタルの供給を停止し、スクリュー４のみ
を所定時間空転を継続させることにより内部のモルタル
をすべて排出させることができ、後に清掃する必要がな
い。When the injection of the mortar is interrupted, the pump 9 is stopped to stop the supply of the mortar, and only the screw 4 is kept idle for a predetermined time so that all the mortar inside can be discharged, and the mortar is cleaned later. No need.
【００１５】[0015]
【発明の効果】以上説明したように本発明によれば、シ
ールド本体の外周面に付設した複数のモルタル注入路を
通じスクリューの回転によりシールド本体の後端からモ
ルタルを連続的に注入するようにしたので、シールド本
体による掘進に合わせてモルタルの注入ができ、これに
より地山の崩壊を確実に防止することができる。またス
クリューの軸長はさほど長くとる必要がないので付帯部
分が大型化せず、シールドの掘進抵抗を増すことがな
い。さらにスクリューによりモルタルを吐出させるので
モルタルの流路内の清掃の必要もなく、メンテナンスも
容易となり、コスト的にも高価になることなく実施する
ことができるなどの種々優れた効果がある。As described above, according to the present invention, the mortar is continuously injected from the rear end of the shield body by the rotation of the screw through the plurality of mortar injection passages provided on the outer peripheral surface of the shield body. Therefore, the mortar can be injected in accordance with the excavation by the shield body, which can surely prevent the ground from collapsing. Further, since the axial length of the screw does not have to be so long, the incidental portion does not become large and the excavation resistance of the shield does not increase. Further, since the mortar is discharged by the screw, there is no need to clean the inside of the mortar channel, maintenance is facilitated, and various advantageous effects such as cost reduction can be achieved.
【図１】本発明を適用したシールドの一部の断面図。FIG. 1 is a partial cross-sectional view of a shield to which the present invention has been applied.
【図２】モルタル注入路の配置例を示すシールドの端面
図。FIG. 2 is an end view of a shield showing an arrangement example of a mortar injection path.
【図３】モルタル注入路部分の断面図。FIG. 3 is a sectional view of a mortar injection path portion.
１ シールド本体 ２ モルタル注入路 ４ スクリュー ７ セグメント ８ モルタル供給路 ９ ポンプ １０ シールド推進用ジャッキ 1 Shield Main Body 2 Mortar Injection Channel 4 Screw 7 Segment 8 Mortar Supply Channel 9 Pump 10 Shield Propulsion Jack
Claims (1)
外面軸方向に複数のモルタル注入路を付設し、この注入
路内にスクリューを内挿して回転駆動自在に形成し、こ
のスクリューの基端部相当位置のモルタル注入路にモル
タル供給路を接続してなり、スクリューの回転により掘
進中にモルタルを地山とセグメントとの間に注入すると
ともにスクリューにより自己清掃作用をなさしめるよう
にしたことを特徴とするシールドにおけるモルタル注入
装置。1. A plurality of mortar injection paths are provided in the axial direction of the outer surface of a cylindrical shield body having a cutting face at the tip, and a screw is inserted in the injection path to be rotatably formed. The mortar supply passage was connected to the mortar injection passage at the position equivalent to the end, so that the mortar was injected between the ground and the segment during excavation by the rotation of the screw, and the screw provided a self-cleaning action. Mortar injection device in a shield characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3259098A JPH0598892A (en) | 1991-10-07 | 1991-10-07 | Mortar injection device in shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3259098A JPH0598892A (en) | 1991-10-07 | 1991-10-07 | Mortar injection device in shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0598892A true JPH0598892A (en) | 1993-04-20 |
Family
ID=17329297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3259098A Pending JPH0598892A (en) | 1991-10-07 | 1991-10-07 | Mortar injection device in shield |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0598892A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115637991A (en) * | 2022-12-26 | 2023-01-24 | 中南大学 | Shield type TBM tunnel wall back grouting equipment |
-
1991
- 1991-10-07 JP JP3259098A patent/JPH0598892A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115637991A (en) * | 2022-12-26 | 2023-01-24 | 中南大学 | Shield type TBM tunnel wall back grouting equipment |
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