JPS5939039B2 - Shield excavation method and device - Google Patents
Shield excavation method and deviceInfo
- Publication number
- JPS5939039B2 JPS5939039B2 JP10371979A JP10371979A JPS5939039B2 JP S5939039 B2 JPS5939039 B2 JP S5939039B2 JP 10371979 A JP10371979 A JP 10371979A JP 10371979 A JP10371979 A JP 10371979A JP S5939039 B2 JPS5939039 B2 JP S5939039B2
- Authority
- JP
- Japan
- Prior art keywords
- injection
- ground
- shield
- cutter
- stirring
- 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
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】
この発明は、シールド掘進方法およびその装置に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shield excavation method and apparatus.
シールド掘進においては現在、シールド掘進機の切羽を
隔壁によって密閉し、掘削した土砂をスクリューコンベ
アを経由して排出する密閉型のメカニカルシールド機械
がかなり採用されている。Currently, in shield excavation, a closed type mechanical shield machine is widely used, which seals the face of the shield excavator with a bulkhead and discharges the excavated earth and sand via a screw conveyor.
しかしながら、このシールド機も、満水した砂、砂礫地
盤に遭偶した場合にはスクリューコンベアからの浸水を
避けることができず、また掘削土砂の排出量の管理が困
難となって切羽が崩壊し、地表では禍犬な地盤沈下ある
いは地盤の陥没などが発生する。However, even this shield machine cannot avoid flooding from the screw conveyor when it encounters water-filled sand or gravel ground, and it becomes difficult to control the amount of excavated soil discharged, causing the face to collapse. On the ground surface, catastrophic ground subsidence or collapse of the ground occurs.
この発明は、シールド前面地山をシールドの進行に伴な
って、かつこれに先行してシールド掘削に適した地盤に
改良することによって、従来のメカニカルシールドが満
水した軟弱地盤に遭偶した際に生じる難点を克服しよう
とするものである。This invention improves the ground in front of the shield to be suitable for shield excavation as the shield progresses and in advance of the progress of the shield, so that when a conventional mechanical shield encounters soft ground full of water, It is an attempt to overcome the difficulties that arise.
従来もシールド前面地山を薬液注入工法などによって改
良することは行なわれていた。Up until now, the ground in front of the shield has been improved using methods such as chemical injection.
従来の注入材をカッターから噴射させる方法では、地山
を十分均一にすることが難かしく、またこの注入材もチ
ャンバー内に漏洩し、あるいはスクリューコンベアから
直接流出してしまうことが多かった。With the conventional method of injecting injection material from a cutter, it is difficult to make the ground sufficiently uniform, and the injection material often leaks into the chamber or directly flows out from the screw conveyor.
また注入材が均一に混合されないために、所期の効果を
えるには多量の注入材を必要とするなどの欠点をもって
いた。Furthermore, since the injection material is not mixed uniformly, a large amount of injection material is required to achieve the desired effect.
本発明によれは、シールド前面地山の地盤改良は、カッ
ター前面の地山中に注入材を攪拌機能をも有する攪拌注
入具によって噴射し、さらに地山をこの攪拌注入具で混
合、均一化することによって達成される。According to the present invention, the ground improvement of the ground in front of the shield is achieved by injecting the injection material into the ground in front of the cutter using a stirring injection tool that also has a stirring function, and further mixing and homogenizing the ground with this stirring injection tool. This is achieved by
以下この発明のシールド掘進方法およびその装置を図面
に基づいて具体的に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The shield excavation method and device thereof according to the present invention will be explained in detail below based on the drawings.
第１図は、カッター１の前面に設けた地盤改良装置Ａの
正面図であり、第２図は同装置を密閉型メカニカルシー
ルド機Ｂに取り付けた状態を示す縦断面図である。FIG. 1 is a front view of a ground improvement device A provided on the front side of a cutter 1, and FIG. 2 is a longitudinal cross-sectional view showing the same device attached to a closed-type mechanical shield machine B.
この地盤改良装置Ａは、注入材注入用配管８、スイベル
１０、カッター内注入用配管１１、注入攪拌翼Ｉ、注入
用ポンプ（図示せず）および注入材タンク（図示せず）
からなっている。This ground improvement device A includes an injection material injection pipe 8, a swivel 10, a cutter injection pipe 11, an injection stirring blade I, an injection pump (not shown), and an injection material tank (not shown).
It consists of
注入タンクからは注入用配管８がスクリューコンベア３
の下部あるいはバルクヘッドの中心を経由してカッター
１の中心にあるスイベル１０に導かれ、そこからカッタ
ー内注入用配管１１が複数の注入撹拌翼７に続いている
。Injection piping 8 connects to the screw conveyor 3 from the injection tank.
It is led to a swivel 10 at the center of the cutter 1 via the lower part of the cutter or the center of the bulkhead, and from there, an intra-cutter injection pipe 11 continues to a plurality of injection stirring blades 7.
この注入撹拌翼Ｉは、カッター面に対して直角あるいは
やや傾斜してカッター１上に突出しており、カッター１
中心からの距離をおのおの変えて、同一軌跡を描かぬよ
う配置されている。The injection stirring blade I protrudes above the cutter 1 at right angles or slightly inclined to the cutter surface.
They are arranged at different distances from the center so that they do not follow the same trajectory.
注入攪拌翼の形状、長さなとは掘削対象地盤によって異
なるが、一般に１０〜１００ｃｍ、の長さが好ましい。The shape and length of the injection stirring blade vary depending on the ground to be excavated, but generally a length of 10 to 100 cm is preferred.
また、断面形状は、円形、楕円形、矩形なとが好ましい
。Further, the cross-sectional shape is preferably circular, oval, or rectangular.
カッターへの取付部は補強するかあるいは断面積を大き
くして破損に対抗できるようにしておく。The attachment part to the cutter should be reinforced or have a large cross-sectional area to protect it from damage.
つぎにシールド機Ｂの前面に地盤改良装置Ａを装着した
装置を使用したシールド掘進方法について述べる。Next, a shield excavation method using a device in which the ground improvement device A is attached to the front of the shield machine B will be described.
注入材は、タンクから注入用ポンプを経由して注入用配
管８、スイベル１０、カッター内注入用配管１１を圧送
されて、攪拌注入具Ｉからシールド前面地山に噴射され
る。The injection material is pumped from the tank via the injection pump through the injection pipe 8, the swivel 10, and the cutter injection pipe 11, and is injected from the stirring injection tool I into the ground in front of the shield.
注入材は注入攪拌機Ｉの先端で噴射され、注入材の逆流
あるいは目詰りを防止するために逆止弁を取り付けても
よい。The injection material is injected at the tip of the injection stirrer I, and a check valve may be installed to prevent backflow or clogging of the injection material.
この注入材の噴射によって、カッター１のトルクあるい
は攪拌注入具に及ぶ抵抗力を軽減することができる。By spraying this injection material, the torque of the cutter 1 or the resistance force exerted on the stirring injection tool can be reduced.
またカッター前面の土砂は、カッター背面の土砂あるい
は面板１２によって拘束されているので、攪拌の効果は
非常によい。Further, since the earth and sand on the front side of the cutter is restrained by the earth and sand on the back side of the cutter or by the face plate 12, the stirring effect is very good.
さらにカッターの駆動によって土砂は均一になり、流動
しやすい状態となる。Furthermore, the drive of the cutter makes the earth and sand uniform, making it easier to flow.
このように流動しやすい状態となった土砂はカッター１
内に取り込まれ、比較的低い圧力でスクリューコンベア
３の口まで流動して行き、スクリューコンベア３によっ
て坑内に取り込まれ、さらにベルトコンベア４、ズリト
ロを経由して坑外に搬出される。The soil that has become easy to flow in this way is cutter 1.
It is taken into the mine, flows at a relatively low pressure to the mouth of the screw conveyor 3, is taken into the mine by the screw conveyor 3, and is further carried out to the outside of the mine via the belt conveyor 4 and the Zuritoro.
使用される注入材は、掘削対象地盤条件に応じて水、粘
土、ベントナイト、ＣＭＣ１発泡剤などから適宜選択さ
れる。The injection material used is appropriately selected from water, clay, bentonite, CMC1 foaming agent, etc., depending on the ground conditions to be excavated.
この発明で地盤改良という用語は、一般に軟弱地盤を強
固な地盤に改良することを指すが、これに限定されず、
堅い地盤を水などの注入剤によって掘削に適する地盤に
改良することをも含むものである。In this invention, the term "ground improvement" generally refers to improving soft ground to solid ground, but is not limited to this,
It also includes improving hard ground into suitable ground for excavation by using injection agents such as water.
第１図は地盤改良装置の正面図、第２図はこの地盤改良
装置を密閉型メカニカルシールド前面に装備した状態を
示す縦断面図である。
１・・・・・・カッター、２・・・・・・カッター駆動
モーター、３・・・・・・スクリューコンベア、４・・
・・・・ベルトコンベア、５・・・・・・ゲートジヤツ
キ、６・・・・・ゼット、Ｉ・・・・・・注入攪拌翼、
８・・・・・・注入用配管、９・・・・・・マンホール
、１０・・・・・・スイベル、１１・・・・・・カッタ
ー内注入用配管、１２・・・・・・面板。FIG. 1 is a front view of the soil improvement device, and FIG. 2 is a longitudinal sectional view showing the soil improvement device installed in front of a closed mechanical shield. 1...Cutter, 2...Cutter drive motor, 3...Screw conveyor, 4...
...Belt conveyor, 5...Gate jack, 6...Zet, I...Injection stirring blade,
8... Piping for injection, 9... Manhole, 10... Swivel, 11... Piping for injection inside cutter, 12... Face plate .
Claims (1)
ールド機のカッター前面に突設された攪拌注入具の先端
から注入材をシールド前面地山中に噴射し、さらに地山
をこの攪拌注入具によって混合攪拌することによって地
盤を改良しつつ掘進を行なうことを特徴とするシールド
掘進方法。 ２ カッター面に対して直角あるいはやや傾斜した方向
を向いてカッター前面に取り付けられ、かつ先端に噴射
孔を有する注入攪拌翼と、この注入攪拌翼に注入材を供
給する配管と、注入材を圧送する注入用ポンプと注入材
タンクとを備えた地盤改良装置をメカニカルシールド掘
進機に装着してなることを特徴とするシールド掘進装置
。[Scope of Claims] 1. When excavating with a mechanical shield excavator, the injection material is injected into the ground in front of the shield from the tip of a stirring injection tool protruding from the front of the cutter of the shield machine, and the ground is further removed by this stirring injection tool. A shield excavation method characterized in that excavation is carried out while improving the ground by mixing and stirring. 2. An injection stirring blade that is attached to the front face of the cutter facing in a direction perpendicular or slightly inclined to the cutter surface and has an injection hole at the tip, piping that supplies the injection material to the injection stirring blade, and a pipe that supplies the injection material under pressure. A shield excavation device characterized in that a ground improvement device equipped with an injection pump and an injection material tank is attached to a mechanical shield excavation machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10371979A JPS5939039B2 (en) | 1979-08-15 | 1979-08-15 | Shield excavation method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10371979A JPS5939039B2 (en) | 1979-08-15 | 1979-08-15 | Shield excavation method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5628994A JPS5628994A (en) | 1981-03-23 |
| JPS5939039B2 true JPS5939039B2 (en) | 1984-09-20 |
Family
ID=14361491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10371979A Expired JPS5939039B2 (en) | 1979-08-15 | 1979-08-15 | Shield excavation method and device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5939039B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824094A (en) * | 1981-08-05 | 1983-02-12 | 株式会社大林組 | Mud pressure shield drilling engineering method using latent curable muddy substance |
| JPS58113491A (en) * | 1981-08-05 | 1983-07-06 | 株式会社大林組 | Method of geostatic system shielding excavation construction using curing muddy material |
| JPS5850297A (en) * | 1981-09-22 | 1983-03-24 | 日立建機株式会社 | Shield excavator |
| JPS6041149B2 (en) * | 1982-07-27 | 1985-09-14 | 日本ペイント株式会社 | Improvement of zinc phosphate film chemical conversion treatment solution |
| JPH05139429A (en) * | 1991-05-30 | 1993-06-08 | Osaka Sealing Insatsu Kk | Label sticking device |
-
1979
- 1979-08-15 JP JP10371979A patent/JPS5939039B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5628994A (en) | 1981-03-23 |
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