JPS594034B2 - How to start a shield excavator - Google Patents
How to start a shield excavatorInfo
- Publication number
- JPS594034B2 JPS594034B2 JP8391879A JP8391879A JPS594034B2 JP S594034 B2 JPS594034 B2 JP S594034B2 JP 8391879 A JP8391879 A JP 8391879A JP 8391879 A JP8391879 A JP 8391879A JP S594034 B2 JPS594034 B2 JP S594034B2
- Authority
- JP
- Japan
- Prior art keywords
- shield machine
- earth
- retaining wall
- frame body
- cut
- 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
- 238000000034 method Methods 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- 238000009412 basement excavation Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】
本発明は発進竪坑に設置したシールド掘削機の発進方法
に関するもので、さらに詳しくは、従来の発進方法を改
良して、シールド掘削機の発進前面に掘進地盤と同じ状
態の地山を自立構成することにより、確実にして安全な
シールド発進を行う発進方法に係るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for starting a shield excavator installed in a starting shaft.More specifically, the present invention relates to a method for starting a shield excavator installed in a starting shaft. The present invention relates to a method of launching a vehicle using a self-supporting structure to ensure safe shield launch.
従来シールド掘削に当っては、掘削開始地点に竪坑を構
設し、この竪坑内にシールド機を設置したのち、シール
ド機前面の竪坑壁にシールド機が前進できる大きさの穴
をあけ、シールド機を周知手段で前進させ、掘削を開始
するものであシ、本発明においてはシールド機の発進前
面の土留壁の切破りに伴い、シールド機の前面だけに掘
削する地盤と同じ土圧を保つ地山を自立構成せしめたの
ち、確実にして安全なシールド発進を行うことをその特
徴とするものである。Conventionally, in shield drilling, a shaft is constructed at the starting point of excavation, a shield machine is installed inside the shaft, and a hole large enough for the shield machine to move forward is drilled in the shaft wall in front of the shield machine. In the present invention, as the earth retaining wall in front of the shield machine is cut out, the earth retains the same earth pressure as the ground to be excavated only in front of the shield machine. The feature is that after making the mountain self-supporting, a reliable and safe shield launch can be performed.
本発明の方法と実施例について説明すると、鋼矢板等の
打込みによシ適宜の竪坑２を構設し、この竪坑２内で組
立てたシールド機３の前面と土留壁１との間に、該シー
ルド機３の進行に適する内径の枠体４を構成するが、こ
の枠体４はＨ型鋼等によって前後の環状枠５，６と、こ
れを連結する平行の支柱７とより成り、前方環状枠５は
前記土留壁１の内面に接着し、かつ各支柱７の間は、第
１図乃至第３図に示すように間隙８を有しているが、必
要に応じて任意の連間板９で各別に閉塞するように構成
されている。To explain the method and embodiments of the present invention, an appropriate shaft 2 is constructed for driving steel sheet piles, etc., and between the front surface of the shielding machine 3 assembled in the shaft 2 and the earth retaining wall 1. A frame body 4 with an inner diameter suitable for the movement of the shield machine 3 is constructed, and this frame body 4 is made of H-shaped steel or the like and is made of front and rear annular frames 5 and 6, and a parallel support 7 that connects them. 5 is adhered to the inner surface of the retaining wall 1, and there is a gap 8 between each support 7 as shown in FIGS. The structure is such that each block is closed separately.
さらに図面中の１０はセグメント、１１は支持台、１２
は土留壁１の切破り部、１３は地盤、１４は埋戻し土砂
を示すものである。Furthermore, 10 in the drawing is a segment, 11 is a support stand, and 12
1 shows the cut-out portion of the retaining wall 1, 13 the ground, and 14 the backfilling earth and sand.
本発明は前記構成により、竪坑２内のシールド機３の前
面に、環状枠５，６と、これを連結する支柱７とによっ
て、シールド機３の進行に適する内径の枠体４を構成し
て、土留壁１にその前方環状枠５で定着しておき、支柱
７間の隙間８を内底部から順次遮閉板９で閉塞しながら
、シールド機３前面の土留壁１の下部を切破り、その切
破９部分１２の高さまで、竪坑２外より土砂１４を埋め
戻し、この作業を繰り返して、枠体４の全内径に土砂１
４を充填し地盤１３に対抗する土圧を保たしめたのち、
周知の方法によりシールド機を、第５図矢示方向への掘
削発進を行うようにしたものである。According to the above configuration, the present invention configures a frame body 4 having an inner diameter suitable for the movement of the shield machine 3 on the front surface of the shield machine 3 in the shaft 2 by the annular frames 5 and 6 and the struts 7 that connect them. , fixed on the earth retaining wall 1 with its front annular frame 5, and cutting out the lower part of the earth retaining wall 1 in front of the shield machine 3 while blocking the gaps 8 between the pillars 7 with shielding plates 9 sequentially from the inner bottom, Backfill earth and sand 14 from outside the shaft 2 to the height of the cut 9 portion 12, and repeat this operation to fill the entire inner diameter of the frame body 4 with earth and sand.
After filling 4 and maintaining the earth pressure against the ground 13,
The shield machine is configured to start digging in the direction indicated by the arrow in FIG. 5 using a well-known method.
以上により本発明は、竪坑２に設置したシールド機３の
前面に、シールド掘削地盤１３と同じ土圧を保つ土砂１
４による自立地山を構成することにより、シールド機３
の掘削発進を、確実にして安全に行わしめる特徴を発揮
するものである。As described above, the present invention provides soil 1 that maintains the same earth pressure as the shield excavation ground 13 in front of the shield machine 3 installed in the shaft 2.
By configuring the self-supporting ground according to 4, the shield machine 3
This feature enables the excavation start to be carried out reliably and safely.
図面は本発明方法を例示するもので、第１図は竪坑内に
設置したシールド機の側面図、第２図は枠体だけの側面
図、第３図は同じく枠体の正面図、第４図は土留壁の下
部を切破り枠体内に土砂を埋戻す場合の要部縦断側面図
、第５図はシールド機の発進開始時の要部縦断側面図で
ある。
符号の説明、１・・・土留壁、２・・・竪坑、３・・・
シールド機、４・・・枠体、５・・・前記環状枠、６・
・・後方環状枠、７・・・支柱、８隙間、９・・・連間
板、１０・・・セグメント、１１・・・支持台、１２・
・・切破り部、１３・・・地盤、１４・・・埋戻し土砂
、１５・・・バッキング。The drawings illustrate the method of the present invention. Figure 1 is a side view of a shield machine installed in a shaft, Figure 2 is a side view of only the frame, Figure 3 is a front view of the frame, and Figure 4 is a side view of the shield machine installed in a shaft. The figure is a longitudinal side view of the main part when the lower part of the earth retaining wall is cut out and earth and sand is backfilled into the frame body, and Figure 5 is a longitudinal side view of the main part when the shield machine starts to start. Explanation of symbols, 1... Retaining wall, 2... Vertical shaft, 3...
Shield machine, 4... Frame body, 5... Said annular frame, 6.
... Rear annular frame, 7... Support, 8 Gap, 9... Continuous plate, 10... Segment, 11... Support stand, 12...
...Cut-cut portion, 13... Ground, 14... Backfill earth and sand, 15... Backing.
Claims (1)
径の枠体を設け、該枠体内に前部を収容する態様でシー
ルド機を設置し、前記枠体前面の土留壁を所定丈ずつ下
部側から上部側へと順次切破りながら、該切破り毎に少
くとも切破り部分の高さまで内側面を閉塞するようにし
た前記枠体内に、切破り部分の高さまで順次埋戻し土砂
を充填せしめ、前記土留壁の切破りと土砂の埋戻しを枠
体内全域に渡って繰返すことにより、土留壁に対するシ
ールド機の発進口の穿設および該発進口の前面に掘削地
盤に対抗する自立地山の造成を行い、その後に前記掘削
地盤に向けてシールド機を発進させるようにしたシール
ド機の発進方法。1. Provide a frame body with an inner diameter that allows the shield machine to advance in contact with the earth retaining wall in the shaft, install the shield machine in such a manner that its front part is accommodated within the frame body, and extend the earth retaining wall in front of the frame body by a predetermined length. While sequentially cutting from the lower side to the upper side, filling the frame with backfilling earth and sand sequentially up to the height of the cut-out part into the frame body, which is closed off the inner surface at least up to the height of the cut-out part at each cut-out. By repeating the cutting of the earth retaining wall and backfilling with earth and sand over the entire area of the frame, a starting opening for the shield machine is drilled into the earth retaining wall, and a self-supporting ground is created in front of the starting opening in opposition to the excavated ground. A method for launching a shield machine, wherein the shield machine is launched toward the excavated ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8391879A JPS594034B2 (en) | 1979-07-04 | 1979-07-04 | How to start a shield excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8391879A JPS594034B2 (en) | 1979-07-04 | 1979-07-04 | How to start a shield excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS569591A JPS569591A (en) | 1981-01-31 |
| JPS594034B2 true JPS594034B2 (en) | 1984-01-27 |
Family
ID=13815974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8391879A Expired JPS594034B2 (en) | 1979-07-04 | 1979-07-04 | How to start a shield excavator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS594034B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5338609A (en) * | 1991-10-30 | 1994-08-16 | Quantum Chemical Corporation | Fractional melt flow rate polymer powders and process for their preparation |
-
1979
- 1979-07-04 JP JP8391879A patent/JPS594034B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS569591A (en) | 1981-01-31 |
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