JPH0431351Y2 - - Google Patents
Info
- Publication number
- JPH0431351Y2 JPH0431351Y2 JP2616687U JP2616687U JPH0431351Y2 JP H0431351 Y2 JPH0431351 Y2 JP H0431351Y2 JP 2616687 U JP2616687 U JP 2616687U JP 2616687 U JP2616687 U JP 2616687U JP H0431351 Y2 JPH0431351 Y2 JP H0431351Y2
- Authority
- JP
- Japan
- Prior art keywords
- digging machine
- injection hole
- muddy water
- liquid injection
- cutter body
- 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
- 239000007788 liquid Substances 0.000 claims description 20
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 235000006506 Brasenia schreberi Nutrition 0.000 claims description 11
- 244000267222 Brasenia schreberi Species 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 description 19
- 239000002689 soil Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- QGTYWWGEWOBMAK-UHFFFAOYSA-N chlormephos Chemical compound CCOP(=S)(OCC)SCCl QGTYWWGEWOBMAK-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、トンネルの掘削に用いる泥水シール
ド堀進機に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a mud water shield excavation machine used for tunnel excavation.
（従来の技術）
従来、泥水シールド堀進機は、一般に第４図に
示すような構造を有していた。同図において、１
は筒状の堀進機本体、２は前面にメインカツター
ビツト３、オーバーカツタービツト４等のカツタ
ービツト類５を配列したカツター本体で、カツタ
ー本体２は、堀進機本体１の前部にラジアルメタ
ル６およびスラスト軸受７を介して回転自在に支
持されている。カツター本体２の後端には大ギヤ
８が一体に設けられ、一方堀進機本体１には前記
大ギヤ８に噛合する小ギヤ９を出力軸端に有する
モータ（油圧モ−タ）１０が固設されており、カ
ツター本体２はモータ１０の作動により任意回動
できるようになつている。(Prior Art) Conventionally, a muddy water shield excavation machine generally had a structure as shown in FIG. In the same figure, 1
2 is a cylindrical digging machine body, 2 is a cutter body with cutter bits 5 such as a main cutter bit 3 and an over cutter bit 4 arranged on the front side; It is rotatably supported via a radial metal 6 and a thrust bearing 7. A large gear 8 is integrally provided at the rear end of the cutter body 2, while a motor (hydraulic motor) 10 having a small gear 9 meshing with the large gear 8 at the output shaft end is provided on the digging machine main body 1. It is fixedly installed, and the cutter body 2 can be rotated arbitrarily by the operation of a motor 10.
また、堀進機本体１の内部には推進用ジヤツキ
１１が配設されている。このジヤツキ１１は、周
方向に複数本設けられ、その出力軸端に後述する
鉄筋コンクリート製セグメント１３の端面に当接
し得る押え板１２を具備している。これにより、
ジヤツキ１１が延び側に作動すると、セグメント
１３を足場に堀進機本体１の全体が矢印Ａ方向に
前進するようになる。 Further, a propulsion jack 11 is disposed inside the digging machine main body 1. A plurality of jacks 11 are provided in the circumferential direction, and the output shaft end thereof is provided with a presser plate 12 that can come into contact with the end face of a reinforced concrete segment 13, which will be described later. This results in
When the jack 11 operates in the extending direction, the entire digging machine main body 1 moves forward in the direction of arrow A using the segments 13 as a foothold.
ところで、堀進機本体１とカツター本体２との
間には圧力室１４が画成されており、堀進機本体
１内には前記圧力室１４に一端を臨ませて送泥菅
１５と排泥菅１６とが配設されている。送泥菅１
５および排泥菅１６は、それぞれ図示を略すポン
プユニツトに接続されており、送泥菅１５を通じ
て前記圧力室１４に泥水が供給され、一方排泥菅
１６を通じて圧力室１４から後述する掘削土砂を
含む泥水が排出されるようになつている。 By the way, a pressure chamber 14 is defined between the digging machine main body 1 and the cutter main body 2, and inside the digging machine main body 1, there is a slurry feeding tube 15 and a discharge tube with one end facing the pressure chamber 14. A mud pipe 16 is provided. Mud feeding pipe 1
5 and the mud removal tube 16 are each connected to a pump unit (not shown), and mud water is supplied to the pressure chamber 14 through the mud feed tube 15, while excavated soil (described later) is removed from the pressure chamber 14 through the mud removal tube 16. The muddy water contained therein is now being discharged.
上記構成の泥水シールド堀進機において、モー
タ１０の作動によりカツター本体２を回動させる
と共にジヤツキ１１の作動により堀進機本体１を
前進させると、カツター本体２の前面のカツター
ビツト類５によつて地山が掘削され、掘削された
土砂は圧力室１４に流れ込む。この時、圧力室１
４には送泥菅１５を通じて泥水が圧送され、切羽
側に適正な泥水圧がかかつて切羽の安定が図ら
れ、これと共に掘削された土砂が泥水に取込まれ
て排泥菅１６を通じて排出される。そして適宜堀
進したところで、ジヤツキ１１を縮み側に作動し
て既設セグメント１３との間に新たなセグメント
（分割セグメント）を組立て、次にこの新たなセ
グメントを足場に前記掘進を行い、以降、この作
業を繰返す。なお、この掘進においてカツター本
体２のオーバーカツタービツト４により地山は余
掘されるが、余掘部は、後にセグメント１３内側
から注入したセメントミルクによつて裏込めさ
れ、これによつてセグメント１３は固定状態とな
る。 In the muddy water shield excavation machine having the above configuration, when the cutter body 2 is rotated by the operation of the motor 10 and the excavation machine body 1 is advanced by the operation of the jack 11, the cutter bits 5 on the front side of the cutter body 2 The ground is excavated, and the excavated earth and sand flows into the pressure chamber 14. At this time, pressure chamber 1
In step 4, mud water is pumped through the mud feeding pipe 15, and appropriate mud water pressure is built up on the face side to stabilize the face.At the same time, the excavated earth and sand is taken into the mud water and discharged through the mud removal pipe 16. Ru. When the excavation has been carried out appropriately, the jack 11 is operated to the contraction side to assemble a new segment (divided segment) between it and the existing segment 13, and then the excavation is carried out using this new segment as a foothold. Repeat the work. In addition, during this excavation, the ground is over-excavated by the over cutter bit 4 of the cutter body 2, but the over-excavated portion is later backfilled with cement milk injected from the inside of the segment 13. 13 is in a fixed state.
（考案が解決しようとする問題点）
ところで、上記泥水シールド堀進機を用いたシ
ールド工法において、曲線施工を行う場合、ある
いは自然に曲つた軌道を修正しようとする場合、
周方向に配した推進用ジヤツキ１１のうちのいく
つかを選択的に作動し、堀進機本体１を片押しす
る態様でこれに対処している。しかしながら、堀
進対象である地山が、例えば土丹層から成る場
合、該土丹層は、泥水により軟弱状態となつた
後、圧力を受けると急速に固化する性質を有する
ため、堀進機本体１の外周面上に回つた上記余掘
土が上記片押しによる圧力を受けて急速に固化
し、この結果、曲線施工の曲り角度を確保するの
が困難となつて、設計変更を余儀なくされる事態
も起こり、その根本的な解決が望まれていた。(Problems to be solved by the invention) By the way, in the shield construction method using the muddy water shield excavation machine, when performing curved construction or when trying to correct a naturally curved trajectory,
This is dealt with by selectively operating some of the propulsion jacks 11 arranged in the circumferential direction to push the digging machine main body 1 to one side. However, if the ground to be excavated consists of the Dotan layer, for example, the Dotan layer has the property of becoming soft due to muddy water and then rapidly solidifying when subjected to pressure. The over-excavated soil that had spread over the outer peripheral surface of the main body 1 rapidly solidified under pressure from the one-sided pushing, and as a result, it became difficult to secure the bending angle for curved construction, and a design change was forced. Situations such as these occurred, and a fundamental solution was desired.
（問題点を解決するための手段）
本考案は、上記従来の問題を解決するため、堀
進機本体に、その外周面に開口する注液孔を設け
ると共に、前記外周面に前記注液孔を通じて圧送
された液体を前記カツター本体側へ噴出するガイ
ド菅を固設するように構成したことを要旨とす
る。(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, the present invention provides a liquid injection hole opening on the outer peripheral surface of the digging machine body, and also provides the liquid injection hole on the outer peripheral surface. The gist is that a guide tube is fixedly installed through which the liquid pumped through is ejected toward the cutter body.
本考案において、上記注液孔に供給する液体と
して、純水あるいは泥水を用いることができる。
泥水を用いる場合は、既設の送泥菅を分岐して該
注液孔に接続するようにすれば良い。またカツタ
ー本体の外周面に固設するガイド菅の数は任意で
あり、周方向に適宜間隔で設け、あるいは曲線施
工の内側となる部位に集中的に設けるようにして
良い。 In the present invention, pure water or muddy water can be used as the liquid supplied to the liquid injection hole.
When using muddy water, the existing mud feeding tube may be branched off and connected to the liquid injection hole. Further, the number of guide tubes fixed to the outer circumferential surface of the cutter body is arbitrary, and they may be provided at appropriate intervals in the circumferential direction, or they may be provided concentratedly on the inner side of the curved construction.
（作用）
上記構成の泥水シールド堀進機において、ガイ
ド菅より液体を噴出することによつて、堀進機本
体の外周面上に回ろうとする余掘土が液圧によつ
て切羽前面に押出され、結果として余掘部に土砂
が滞留することがなくなり、曲線施工あるいは曲
り修正を容易に実施できるようになる。(Function) In the muddy water shield excavation machine with the above configuration, by spouting liquid from the guide tube, the over-excavated soil that is about to go around on the outer peripheral surface of the excavation machine body is pushed out to the front of the face by hydraulic pressure. As a result, earth and sand will not accumulate in the over-excavation area, making it easier to construct curves or correct bends.
（実施例）
以下、本考案の実施例を添付図面にもとづいて
説明する。(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.
第１図〜第３図は、本考案にかゝる泥水シール
ド堀進機を示したものである。なお、前出の第４
図に示した部分と同一部分には同一符号を付し、
その説明を省略することとする。本実施例におい
て、堀進機本体１の前部側には、外周面に開口す
る注液孔２１が穿設されている。注液孔２１は、
その内面にめねじを設けており、これには堀進機
本体１の内側からソケツト２２が螺合されてい
る。また前記ソケツト２２に送泥菅１５から分岐
した分岐配管２３が接続されている。分岐配管２
３にはバルブ２４が介装されており、このバルブ
２４を開くことによつて、注液孔２１には所定圧
（３〜４Kg／cm2程度）の泥水が供給されるように
なつている。 1 to 3 show a muddy water shield digging machine according to the present invention. In addition, the above-mentioned 4th
The same parts as those shown in the figure are given the same reference numerals.
The explanation thereof will be omitted. In this embodiment, a liquid injection hole 21 that opens on the outer circumferential surface is bored in the front side of the digging machine main body 1. The liquid injection hole 21 is
A female thread is provided on its inner surface, and a socket 22 is screwed into this from the inside of the digging machine main body 1. Further, a branch pipe 23 branched from the mud feeding tube 15 is connected to the socket 22. Branch piping 2
3 is equipped with a valve 24, and by opening this valve 24, muddy water at a predetermined pressure (approximately 3 to 4 kg/cm 2 ) is supplied to the liquid injection hole 21. .
一方、堀進機本体１の外周面には、前記注液孔
２１に連通する断面半円状のガイド菅２５が固設
されている。ガイド菅２５は、有底、長尺に形成
されており、その底部付近を前記注液孔２１に臨
ませかつその開口２５ａをカツター本体２側へ向
けた状態で堀進機本体１の軸方向に沿うように配
設されている。 On the other hand, a guide tube 25 having a semicircular cross section and communicating with the liquid injection hole 21 is fixed on the outer peripheral surface of the digging machine main body 1. The guide tube 25 has a bottom and is formed to be elongated, and is placed in the axial direction of the digging machine body 1 with its bottom portion facing the liquid injection hole 21 and its opening 25a facing the cutter body 2 side. It is arranged along the
なお、上記注液孔２１とガイド菅２５との組
は、こゝでは２組設けられているが、その配設部
位は曲線施工の内側とされている。またガイド菅
２５の高さは、地山２６に対する余掘部２７の高
さよりわずか小さく設定されている（第３図）。 Note that two sets of the liquid injection hole 21 and the guide tube 25 are provided here, and the locations where they are disposed are inside the curved construction. Further, the height of the guide tube 25 is set to be slightly smaller than the height of the extra excavation portion 27 relative to the ground 26 (FIG. 3).
かゝる構成により、掘進に際しては、予めバル
ブ２４を開いて注液孔２１を通じてガイド菅２５
に泥水を供給し、第２図に矢印Ｂで示すように該
泥水をガイド菅２５の開口２５ａからカツター本
体２側へ噴出しておく。そして前記第４図に付説
明したと同様の手順によりカツター本体２を回動
しかつ堀進機本体１を前進させる。すると、カツ
ター本体２の前面のオーバーカツタービツト４に
より掘削された余掘土が堀進機本体１の外周面上
に侵入しようとするが、ガイド菅２５から噴出さ
れる泥水によつて切羽前面に押出され、前記圧力
室１４（第４図）に流れ込んで、そこから排泥菅
１６（第４図）を通じて外部へ排出される。 With this configuration, when digging, the valve 24 is opened in advance and the guide tube 25 is poured through the liquid injection hole 21.
The muddy water is supplied to the cutter body 2, and the muddy water is spouted out from the opening 25a of the guide tube 25 toward the cutter body 2 as shown by arrow B in FIG. Then, the cutter body 2 is rotated and the digging machine body 1 is advanced by the same procedure as explained in FIG. 4 above. Then, the excess soil excavated by the over cutter bit 4 on the front surface of the cutter body 2 tries to enter the outer peripheral surface of the excavation machine body 1, but the muddy water spouted from the guide pipe 25 blocks the front face of the face. The sludge is pushed out, flows into the pressure chamber 14 (FIG. 4), and is discharged from there to the outside through the mud removal tube 16 (FIG. 4).
したがつて、いまガイド菅２５を設けた側に曲
線施工しても、同側の余堀部２７には余掘土が堆
積しておらず、これによつて同側への堀進を円滑
に行うことができるようになる。因みに、外径
2.1M，全長3.9Mの大きさの本シールド堀進機を
用い、注液孔２１の直径36mm、ガイド菅２５の高
さが18mm、ガイド菅２５の長さ200mm、泥水圧力
３〜４Kg／cm2の設定条件のもと、曲線施工を実施
したところ、曲率半径50Mのトンネルを円滑に施
工することができた。 Therefore, even if a curved line is constructed on the side where the guide pipe 25 is currently installed, no extra excavation soil will be accumulated in the excavation portion 27 on the same side, and this will facilitate the excavation to the same side. be able to do it. By the way, the outer diameter
Using this shield drilling machine with a size of 2.1M and a total length of 3.9M, the diameter of the injection hole 21 is 36mm, the height of the guide tube 25 is 18mm, the length of the guide tube 25 is 200mm, and the muddy water pressure is 3 to 4 Kg/cm. When we carried out curved construction under the setting conditions of 2 , we were able to smoothly construct a tunnel with a radius of curvature of 50M.
（考案の効果）
以上、詳細に説明したように、本考案にかゝる
泥水シールド堀進機は、堀進機本体の外周面に注
液孔を通じて圧送された液体をカツター本体側へ
噴出するガイド菅を付設したので、余掘土を切羽
前面に押出することが可能になり、余掘土によつ
て堀進方向が阻害されることがなくなつて、土質
によらず曲線施工あるいは方向修正を容易に実施
できる効果が得られた。(Effects of the invention) As explained above in detail, the muddy water shield digging machine according to the invention squirts the liquid pumped through the liquid injection hole on the outer peripheral surface of the digging machine body toward the cutter body side. The addition of a guide tube makes it possible to push the excess soil to the front of the face, and the direction of excavation is not obstructed by the excess soil, making it possible to perform curved construction or direction correction regardless of the soil quality. The effect was that it was easy to implement.
第１図は、本考案にかゝる泥水シールド堀進機
の平面図、第２図は第１図の拡大平面図、第３図
は第１図の−矢視線に添う断面図、第４図は
従来の泥水シールド機の断面図である。
１……堀進機本体、２……カツター本体、５…
…カツタービツト、１１……推進用ジヤツキ、１
５，１６……送・排泥菅、２１……注液孔、２５
……ガイド菅。
Fig. 1 is a plan view of the muddy water shield excavation machine according to the present invention, Fig. 2 is an enlarged plan view of Fig. 1, Fig. 3 is a sectional view along the - arrow line in Fig. 1, and Fig. 4 The figure is a sectional view of a conventional muddy water shield machine. 1...Horishin machine body, 2...Cutter body, 5...
...Katsuturbit, 11...Propulsion jack, 1
5, 16... feeding/sludge drainage tube, 21... liquid injection hole, 25
...Guide Suga.
Claims (1)
筒状の掘進機本体の前部にモータにより回転駆動
されるカツター本体を取付けると共に、切羽側に
泥水圧をかけかつ掘削土砂を泥水と共に排出する
送・排泥手段を内蔵して成る泥水シールド堀進機
において、前記堀進機本体に、その外周面に開口
する注液孔を設けると共に、該外周面に前記注液
孔を通じて圧送された液体を前記カツター本体側
へ噴出するガイド菅を固設したことを特徴とする
泥水シールド堀進機。 A cutter body that is rotationally driven by a motor is attached to the front of the cylindrical excavator body that is propelled by a propulsion jack installed inside, and a feeder that applies mud water pressure to the face side and discharges excavated earth and sand together with mud water. In a muddy water shield digging machine having a built-in sludge removal means, the digging machine main body is provided with a liquid injection hole that opens on its outer peripheral surface, and the liquid pumped through the liquid injection hole is pumped into the outer peripheral surface. A muddy water shield digging machine characterized by a fixed guide pipe that spouts out to the cutter body side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2616687U JPH0431351Y2 (en) | 1987-02-24 | 1987-02-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2616687U JPH0431351Y2 (en) | 1987-02-24 | 1987-02-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63136092U JPS63136092U (en) | 1988-09-07 |
| JPH0431351Y2 true JPH0431351Y2 (en) | 1992-07-28 |
Family
ID=30826993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2616687U Expired JPH0431351Y2 (en) | 1987-02-24 | 1987-02-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0431351Y2 (en) |
-
1987
- 1987-02-24 JP JP2616687U patent/JPH0431351Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63136092U (en) | 1988-09-07 |
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