JPS6350515B2 - - Google Patents
Info
- Publication number
- JPS6350515B2 JPS6350515B2 JP17554883A JP17554883A JPS6350515B2 JP S6350515 B2 JPS6350515 B2 JP S6350515B2 JP 17554883 A JP17554883 A JP 17554883A JP 17554883 A JP17554883 A JP 17554883A JP S6350515 B2 JPS6350515 B2 JP S6350515B2
- Authority
- JP
- Japan
- Prior art keywords
- shield machine
- diameter
- expanding
- tunnel
- jack
- 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 6
- 238000010276 construction Methods 0.000 claims description 4
- 235000014025 Eugenia carissoides Nutrition 0.000 description 1
- 244000272647 Eugenia carissoides Species 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は掘進中に切削トンネル径を拡大する
拡大シールド工法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an expansion shield method for expanding the diameter of a cut tunnel during excavation.
（従来技術）
シールド機によつて掘進中にトンネル径の拡大
が必要な場合がある。このようなとき従来は一旦
シールド機で掘削してしまつた後に素掘りでトン
ネル径を拡大を行う等の面倒且つ危険な作業を行
つていた。(Prior art) It may be necessary to expand the tunnel diameter during excavation using a shield machine. In such cases, conventionally, the tunnel has been excavated with a shield machine and then the diameter of the tunnel enlarged by bare digging, which is a troublesome and dangerous operation.
（発明の目的）
この発明は以上のような問題点を改善するため
になされたもので、掘進中に切削トンネル径の拡
大を容易且つ安全に行うことが可能な拡大シール
ド工法を提供することを目的とする。(Object of the invention) This invention was made to improve the above-mentioned problems, and aims to provide an expansion shield construction method that allows the diameter of a cut tunnel to be easily and safely expanded during excavation. purpose.
（発明の構成）
この発明にかかる拡大シールド工法は、シール
ド機によつて掘進中、切削トンネル前方を地盤改
良し、該地盤改良部を掘削して拡径を行い、該拡
径部の内部にて拡大シールド機を組立て、該拡大
シールド機に設置したジヤツキを掘削方向前方に
固定したアンカーに連結し、ジヤツキを作動して
拡大シールド機を前進せしめることによつて上記
の目的を達成するものである。(Structure of the Invention) The expanding shield construction method according to the present invention improves the ground in front of the cutting tunnel while excavating with a shield machine, excavates the ground improved part to enlarge the diameter, and then expands the inside of the expanded diameter part. The above purpose is achieved by assembling an expanding shield machine, connecting a jack installed on the expanding shield machine to an anchor fixed in front in the excavation direction, and operating the jack to move the expanding shield machine forward. be.
（実施例）
以下、図に示す実施例に基づきこの発明を詳細
に説明する。(Example) Hereinafter, this invention will be explained in detail based on the example shown in the drawings.
図において１はシールド機であり、２はシール
ド機１によつて掘削した後、後方に順次組立てた
セグメントである。 In the figure, 1 is a shield machine, and 2 is a segment that is assembled rearward after excavation by the shield machine 1.
シールド機１によつて切削トンネルの径を拡大
する位置よりも幾らか前進せしめて掘削する。 The shield machine 1 excavates the cutting tunnel by moving it slightly forward from the position where the diameter of the cutting tunnel is to be expanded.
次にシールド機１の前方で且つ切削トンネルよ
りも幅広く地山に薬液等を注入して地盤改良を行
い、地盤改良部３を形成する。該地盤改良部３を
掘削して切削トンネルの径を拡大し、拡径部４を
形成する。 Next, ground improvement is performed by injecting a chemical solution or the like into the ground in front of the shield machine 1 and wider than the cutting tunnel to form a ground improvement section 3. The ground improvement section 3 is excavated to enlarge the diameter of the cut tunnel to form an enlarged diameter section 4.
拡径部４内にて拡大シールド機５を組立てる。
６は山留めであつてシールド機１と拡大シールド
機５との空〓を埋める。 The enlarged shield machine 5 is assembled inside the enlarged diameter section 4.
6 is a mountain stopper and fills the void between shield machine 1 and expansion shield machine 5.
拡径部４の前方にアンカー７を打設して固定す
る。該アンカー７と拡大シールド機５内に設置し
た油圧ジヤツキ８を連結する。 An anchor 7 is driven and fixed in front of the enlarged diameter portion 4. The anchor 7 is connected to a hydraulic jack 8 installed inside the expansion shield machine 5.
以上の状態にて油圧ジヤツキ８を作動して拡大
シールド機５を前進せしめる。拡大シールド機５
の後方には順次セグメント２を組立てる。 In the above state, the hydraulic jack 8 is operated to move the expanding shield machine 5 forward. Expanding shield machine 5
Segment 2 is assembled in sequence behind the.
拡径部４内にシールド機１全長より長い長さま
でセグメント２を組立てた後、シールド機１内に
残りのセグメント２を組立てながら、シールド機
１を引き抜く。 After assembling the segments 2 to a length longer than the entire length of the shield machine 1 in the enlarged diameter part 4, the shield machine 1 is pulled out while assembling the remaining segments 2 inside the shield machine 1.
（発明の効果）
この発明は以上のような構成を有するため、シ
ールド機によつて掘進中、切削トンネルの径を拡
大して更に掘削することが容易且つ安全に行うこ
とが可能である。(Effects of the Invention) Since the present invention has the above-described configuration, it is possible to easily and safely expand the diameter of the cutting tunnel to further excavate the tunnel while it is being excavated by the shield machine.
第１図〜第５図はこの発明の一実施例の施工順
序縦断面図である。
１…シールド機、２…セグメント、３…地盤改
良部、４…拡径部、５…拡大シールド機、６…山
留め、７…アンカー、８…油圧ジヤツキ。
1 to 5 are longitudinal cross-sectional views in the construction order of an embodiment of the present invention. 1... Shield machine, 2... Segment, 3... Ground improvement section, 4... Diameter expansion section, 5... Expanding shield machine, 6... Mountain retainer, 7... Anchor, 8... Hydraulic jack.
Claims (1)
方を地盤改良し、該地盤改良部を掘削して拡径を
行い、該拡径部の内部にて拡大シールド機を組立
て、該拡大シールド機に設置したジヤツキを掘削
方向前方に固定したアンカーに連結し、ジヤツキ
を作動して拡大シールド機を前進せしめることを
特徴とする拡大シールド工法。1. While excavating with a shield machine, improve the ground in front of the cutting tunnel, excavate the ground improvement part to expand the diameter, assemble the expanding shield machine inside the expanded diameter part, and install it on the expanding shield machine. This expanding shield construction method is characterized in that the jack is connected to an anchor fixed forward in the excavation direction, and the jack is activated to move the expanding shield machine forward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17554883A JPS6065896A (en) | 1983-09-22 | 1983-09-22 | Enlarging shield construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17554883A JPS6065896A (en) | 1983-09-22 | 1983-09-22 | Enlarging shield construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6065896A JPS6065896A (en) | 1985-04-15 |
| JPS6350515B2 true JPS6350515B2 (en) | 1988-10-11 |
Family
ID=15998000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17554883A Granted JPS6065896A (en) | 1983-09-22 | 1983-09-22 | Enlarging shield construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6065896A (en) |
-
1983
- 1983-09-22 JP JP17554883A patent/JPS6065896A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6065896A (en) | 1985-04-15 |
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