JPS6216314B2 - - Google Patents
Info
- Publication number
- JPS6216314B2 JPS6216314B2 JP13013782A JP13013782A JPS6216314B2 JP S6216314 B2 JPS6216314 B2 JP S6216314B2 JP 13013782 A JP13013782 A JP 13013782A JP 13013782 A JP13013782 A JP 13013782A JP S6216314 B2 JPS6216314 B2 JP S6216314B2
- Authority
- JP
- Japan
- Prior art keywords
- shield
- piece
- diameter tunnel
- donut
- shield piece
- 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
- 238000009412 basement excavation Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 4
- 235000012489 doughnuts Nutrition 0.000 claims description 3
- 230000001141 propulsive effect Effects 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000004576 sand Substances 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、通常径トンネルの外周囲に拡大トン
ネルを掘削する際にシールドの推進反力をとり易
くした分割推進型シールド掘削方法と装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a divided propulsion type shield excavation method and apparatus that makes it easier to absorb the propulsion reaction force of the shield when excavating an enlarged tunnel around the outer periphery of a normal diameter tunnel.
本件出願人は、先に特願昭56−153966号（特開
昭58−98595号）で新規なトンネル拡大掘削工法
を提案した、該工法は一次シールドを行つたトン
ネル内の拡大予定区域の一方端部に拡大シールド
機を設置し、一次シールドセグメントの外周に沿
つて拡大シールド機を軸線方向に推進させて拡大
掘削を行うと共に、当該拡大掘削部分の一次シー
ルドセグメントを順次取外しながら拡大部に二次
シールドセグメントを施こすようにしたものであ
る。しかし、トンネルの径が大きくなるとシール
ド機を推進させるためにセグメントに大きな反力
を負担させることになる。 The applicant previously proposed a new tunnel expansion excavation method in Japanese Patent Application No. 56-153966 (Japanese Unexamined Patent Publication No. 58-98595). An expanding shield machine is installed at the end, and the expanding shield machine is propelled in the axial direction along the outer periphery of the primary shield segment to perform expanding excavation, and at the same time, the primary shield segments of the expanded excavated part are sequentially removed and the secondary shield machine is installed at the expanded part. Next, a shield segment is applied. However, if the diameter of the tunnel becomes large, the segments will bear a large reaction force in order to propel the shield aircraft.
本発明は、前記の問題を改善するためのもので
あり、セグメントに対する反力の負担を軽減し且
つ良好な拡大掘削を可能とした分割推進型シール
ド掘削方法と装置の提供を目的とする。 The present invention is intended to improve the above-mentioned problems, and aims to provide a split propulsion type shield excavation method and apparatus that reduces the burden of reaction force on the segments and enables good expanded excavation.
以下、図面に示す実施例に基づいて本発明を説
明する。 The present invention will be described below based on embodiments shown in the drawings.
第１〜２図は本発明装置の第１実施例を示し、
この装置はドーナツ状のシールドを放射状に分割
することにより形成された複数のシールド片１
と、各シールド片１を元のドーナツ状に保持する
保持部材２と、各シールド片１を個々に独立的に
推進させるため、各シールド片１に個々に取り付
けられたジヤツキのような推進駆動装置３とから
構成されている。また、本実施例では、各シール
ド片１間に案内レール４が設けられている。 1 and 2 show a first embodiment of the device of the present invention,
This device consists of a plurality of shield pieces 1 formed by radially dividing a donut-shaped shield.
, a holding member 2 that holds each shield piece 1 in its original donut shape, and a propulsion drive device such as a jack attached to each shield piece 1 individually in order to independently propel each shield piece 1 . It is composed of 3. Further, in this embodiment, a guide rail 4 is provided between each shield piece 1.
上記装置は、通常径トンネルT1の一部に拡大
トンネルT2を掘削形成するためのものとして例
示されており、各シールド片１はトンネルT1用
の１次セグメント５の外周で推進せしめられる。
このシールド片１を推進させる力は、拡大トンネ
ルT2に装着した２次セグメント６をジヤツキ３
が押圧するときの反力により得られる。尚、本発
明ではシールド片１が拡大トンネルT2を形成す
るために作られているので、各シールド片１の中
央部７は通常径トンネルT1の一次セグメント５
が収嵌できる大きさで中空となつている。 The above device is exemplified as one for excavating and forming an enlarged tunnel T2 in a part of a normal diameter tunnel T1 , and each shield piece 1 is propelled by the outer periphery of the primary segment 5 for the tunnel T1 . .
The force that propels this shield piece 1 is generated by jacking the secondary segment 6 attached to the enlarged tunnel T 2 .
It is obtained by the reaction force when pressed. In addition, in the present invention, since the shield pieces 1 are made to form an enlarged tunnel T 2 , the central part 7 of each shield piece 1 is the primary segment 5 of the normal diameter tunnel T 1 .
It is hollow and large enough to fit.
上記の装置により掘削を行なう場合には、各シ
ールド片１を適宜選択して、別々に推進させる。
従つて、セグメント６（又は５）には一度に過大
な押圧力が加わることがなく、セグメントの抵抗
力が損われず、セグメントから推進反力を得易く
なる利点がある。 When excavating with the above device, each shield piece 1 is appropriately selected and propelled separately.
Therefore, there is an advantage that an excessive pressing force is not applied to the segments 6 (or 5) at once, the resistance force of the segments is not impaired, and it becomes easier to obtain a propulsive reaction force from the segments.
第３〜７図は本発明装置の第２実施例を示し、
各シールド片１は外筒８と内筒９からなる保持部
材中に保持されており、また各シールド片１には
土砂を搬送するスクリユーコンベア１０が設けら
れている。スクリユーコンベア１０には油圧モー
ター１１が設けられている。また、符号１２はス
クリユーコンベア羽根、１３はスクリユーコンベ
ア用ゲート、１４は外筒８をセグメント６に対し
て推進させるための外筒摺動用ジヤツキ、１５は
テールパツキンを示す。 3 to 7 show a second embodiment of the device of the present invention,
Each shield piece 1 is held in a holding member consisting of an outer cylinder 8 and an inner cylinder 9, and each shield piece 1 is provided with a screw conveyor 10 for conveying earth and sand. The screw conveyor 10 is provided with a hydraulic motor 11. Further, reference numeral 12 indicates a screw conveyor blade, 13 a gate for the screw conveyor, 14 an outer cylinder sliding jack for propelling the outer cylinder 8 relative to the segment 6, and 15 a tail packing.
この実施例の場合も、掘削時には各シールド片
１が個々に独立して推進される。尚、ジヤツキ３
は外筒８に対してシールド片１を推進させる。 Also in this embodiment, each shield piece 1 is individually and independently propelled during excavation. In addition, Jyatsuki 3
propels the shield piece 1 against the outer cylinder 8.
第８〜９図は本発明装置の第３実施例を示し、
各シールド片１には第２実施例と同様にスクリユ
ーコンベア１０が設けられているが、外筒８及び
内筒９は省略されている。この場合、ジヤツキ３
は、２次セグメント６から直接反力を得る。 8-9 show a third embodiment of the device of the present invention,
Each shield piece 1 is provided with a screw conveyor 10 as in the second embodiment, but the outer cylinder 8 and inner cylinder 9 are omitted. In this case, jack 3
obtains the reaction force directly from the secondary segment 6.
第１０〜１１図は、本発明装置の第４実施例を
示し、この実施例は第３実施例の各シールド片１
に２つのスクリユーコンベア１０を設けてなるも
のである。 10 and 11 show a fourth embodiment of the device of the present invention, and this embodiment is similar to each shield piece 1 of the third embodiment.
The screw conveyor 10 is provided with two screw conveyors 10.
第１２〜１３図は、本発明装置の第５実施例を
示し、この実施例は第３実施例の各シールド片１
に、回転式カツター１６を設けてなるものであ
る。 12 and 13 show a fifth embodiment of the device of the present invention, and this embodiment is similar to each shield piece 1 of the third embodiment.
A rotary cutter 16 is provided at the top.
各実施例の説明から明らかなように、本発明に
よると一次セグメントが収嵌できるドーナツ状の
シールドを放射状に分割して複数のシールド片を
形成し、各シールド片毎に独立して推進させるの
で、推進反力を発生させるセグメントの負担が軽
くなり、推進反力が得易くなる。また、各シール
ド片毎に掘削を行なうので、作業も分割して行な
え、能率が向上する。また、軟弱地盤層の掘進に
おいては、各シールド片が夫々ブラインド状態で
推進することが可能であるので、切羽の保持に適
切に対処できる利点もある。更に、各シールド片
が個々に推進されるので、土質の異なりに応じて
各推進駆動装置の推進力を変えることができ、各
シールド片の推進量を補正することができる。従
つて、正しい掘削方向を常に確保することが容易
となる。 As is clear from the description of each embodiment, according to the present invention, a donut-shaped shield into which a primary segment can be accommodated is divided radially to form a plurality of shield pieces, and each shield piece is propelled independently. , the load on the segment that generates the propulsive reaction force becomes lighter, and the propulsive reaction force becomes easier to obtain. Furthermore, since excavation is performed for each shield piece, the work can be divided into parts, improving efficiency. Further, when excavating a soft ground layer, each shield piece can be propelled in a blind state, so there is an advantage that the face can be properly maintained. Furthermore, since each shield piece is propelled individually, the propulsive force of each propulsion drive device can be changed depending on the soil quality, and the amount of propulsion of each shield piece can be corrected. Therefore, it becomes easy to always ensure the correct excavation direction.
第１図は、本発明装置の第１実施例を示す概略
縦断面図、第２図は第１図の左側面図、第３図は
第２実施例装置の縦断面図、第４図は第３図の左
側面図、第５図は第３図の概略斜視図、第６図は
第３図の一部を省略した右側面図、第７図は第６
図の左側面図、第８図は第３実施例装置の要部縦
断面図、第９図は第８図の左側面図、第１０図は
第４実施例装置の要部縦断面図、第１１図は第１
０図の左側面図、第１２図は第５実施例装置の要
部縦断面図、第１３図は第１２図の左側面図であ
る。
T1……通常径トンネル、T2……拡大トンネ
ル、１……シールド片、２……保持部材、３……
推進駆動装置、４……案内レール、５……１次セ
グメント、６……２次セグメント、７……中央
部、８……外筒、９……内筒、１０……スクリユ
ーコンベア、１１……油圧モーター、１２……ス
クリユーコンベア羽根、１３……スクリユーコン
ベアゲート、１４……外筒用推進ジヤツキ、１５
……摺接シール、１６……回転式カツター。
FIG. 1 is a schematic vertical cross-sectional view showing a first embodiment of the device of the present invention, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a vertical cross-sectional view of the second embodiment of the device, and FIG. Fig. 3 is a left side view, Fig. 5 is a schematic perspective view of Fig. 3, Fig. 6 is a right side view with a part of Fig. 3 omitted, and Fig. 7 is a
8 is a longitudinal sectional view of the main part of the device of the third embodiment, FIG. 9 is a left side view of FIG. 8, and FIG. 10 is a longitudinal sectional view of the main part of the device of the fourth embodiment. Figure 11 is the first
0 is a left side view of FIG. 0, FIG. 12 is a vertical cross-sectional view of a main part of the device of the fifth embodiment, and FIG. 13 is a left side view of FIG. 12. T 1 ... Normal diameter tunnel, T 2 ... Expanded tunnel, 1 ... Shield piece, 2 ... Holding member, 3 ...
Propulsion drive device, 4... Guide rail, 5... Primary segment, 6... Secondary segment, 7... Central portion, 8... Outer cylinder, 9... Inner cylinder, 10... Screw conveyor, 11 ... Hydraulic motor, 12 ... Screw conveyor blade, 13 ... Screw conveyor gate, 14 ... Propulsion jack for outer cylinder, 15
...Sliding seal, 16...Rotary cutter.
Claims (1)
とにより形成された個々のシールド片を元のドー
ナツ状に保持すると共に、これを通常径トンネル
の一次セグメントに外嵌させ、前記各シールド片
を適宜選択して一次セグメントに沿つて独立的に
推進させ、通常径トンネルの周囲を拡大掘削する
分割推進型シールド掘削方法。 ２ 中央部に通常径トンネルの一次セグメントが
収嵌できる中空を備えたドーナツ状のシールドを
放射状に分割することにより形成された複数のシ
ールド片と、各シールド片を元のドーナツ状に保
持する保持部材と、各シールド片を個々に独立的
に推進させて前記通常径トンネルの周囲を拡大掘
削するため、各シールド片に個々に取付けられた
推進駆動装置とを具備する分割推進型シールド掘
削装置。[Scope of Claims] 1. Individual shield pieces formed by radially dividing a donut-shaped shield are held in the original donut shape, and are fitted onto the primary segment of a normal diameter tunnel, and each of the above-mentioned shield pieces is A split propulsion type shield excavation method in which shield pieces are appropriately selected and independently propelled along the primary segment to enlarge and excavate the circumference of a normal diameter tunnel. 2 A plurality of shield pieces formed by radially dividing a donut-shaped shield with a hollow in the center into which the primary segment of a normal-diameter tunnel can fit, and a holder that holds each shield piece in its original donut shape. A split propulsion type shield excavation device comprising: a member; and a propulsion drive device individually attached to each shield piece for expanding and excavating the circumference of the normal diameter tunnel by independently propelling each shield piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13013782A JPS5921896A (en) | 1982-07-26 | 1982-07-26 | Division propulsion type shield excavation method and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13013782A JPS5921896A (en) | 1982-07-26 | 1982-07-26 | Division propulsion type shield excavation method and its device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5921896A JPS5921896A (en) | 1984-02-03 |
| JPS6216314B2 true JPS6216314B2 (en) | 1987-04-11 |
Family
ID=15026838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13013782A Granted JPS5921896A (en) | 1982-07-26 | 1982-07-26 | Division propulsion type shield excavation method and its device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5921896A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60238599A (en) * | 1984-05-08 | 1985-11-27 | 株式会社小松製作所 | Enlarging shield drilling machine |
| JPS61274090A (en) * | 1985-05-30 | 1986-12-04 | 株式会社大林組 | Expansion shielding machine |
| JP3737493B2 (en) * | 2003-05-15 | 2006-01-18 | 飛島建設株式会社 | Large section shield excavation method |
-
1982
- 1982-07-26 JP JP13013782A patent/JPS5921896A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5921896A (en) | 1984-02-03 |
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