JPH0528316B2 - - Google Patents
Info
- Publication number
- JPH0528316B2 JPH0528316B2 JP25619386A JP25619386A JPH0528316B2 JP H0528316 B2 JPH0528316 B2 JP H0528316B2 JP 25619386 A JP25619386 A JP 25619386A JP 25619386 A JP25619386 A JP 25619386A JP H0528316 B2 JPH0528316 B2 JP H0528316B2
- Authority
- JP
- Japan
- Prior art keywords
- shield
- excavation
- solidified
- shield machine
- docking
- 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 - Fee Related
Links
- 238000009412 basement excavation Methods 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 238000007711 solidification Methods 0.000 claims description 8
- 230000008023 solidification Effects 0.000 claims description 8
- 238000003032 molecular docking Methods 0.000 description 15
- 238000010276 construction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】
「発明の利用分野」
この発明は、密閉型シールドマシンによつて掘
進する工法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method of excavating an excavation using a closed shield machine.
「従来技術、発明が解決せんとする問題点」
一般に、シールド工法により坑道の長いトンネ
ルを施工する場合においては、途中で回転カツタ
ーのビツトが摩耗し、これを交換する必要があ
り、また工期、工費の削減のため両側から掘進し
て中間部でドツキングするが、海底トンネルなど
地盤が軟弱な現場においてはビツト交換の際並び
にドツキングの際に、先端の泥水の排出と同時に
地山が崩落する危険があつた。``Prior Art and Problems to be Solved by the Invention'' Generally, when constructing a long tunnel using the shield method, the bits of the rotary cutter wear out during the construction process and must be replaced. To reduce construction costs, excavation is done from both sides and docking is done in the middle, but in sites where the ground is soft, such as undersea tunnels, there is a risk of the ground collapsing at the same time as muddy water is discharged from the tip when changing bits or docking. It was hot.
そこでこの問題を解決するため、従来において
地上又は地中から周辺地盤を予め凍結したり、薬
液注入により地盤改良した上で掘進する工法、或
いはドツキングの際に双方のシールド本体の先端
部に進退自在の支保フードを設置して、ドツキン
グ後相互の支保フードを突き出して接合する工法
などが知られている。 Therefore, in order to solve this problem, conventional methods have been used in which the surrounding ground is frozen in advance from above the ground or underground, or the ground is improved by injecting chemicals before digging, or when docking, the tip of both shield bodies can be freely advanced and retreated. A known method is to install two supporting hoods, and after docking, protrude and join each other's supporting hoods.
しかしながら、前者においては掘進前又はドツ
キング前に掘進を停止して地盤改良工法を実施す
る必要があるため能率が悪いと共に、特に凍結工
法においては凍土形成までに多大の時間と工費を
要し、また薬液注入工法においては確実な団結が
期待できない等の欠点があつた。 However, in the former method, it is inefficient because it is necessary to stop excavation before excavation or docking and implement a ground improvement method. In addition, especially in the freezing method, it takes a lot of time and cost to form frozen soil, and The chemical injection method had drawbacks such as the fact that reliable unity could not be expected.
また、後者においては掘進位置がズレたり掘進
方向が斜交した場合、双方の支保フードが食違い
又は突き出し不能となつたりする不具合を生じ、
安全かつ確実なドツキングが期待できない等の欠
点があつた。 In addition, in the latter case, if the excavation position is misaligned or the excavation directions are diagonal, problems may occur such as the supporting hoods on both sides being misaligned or becoming impossible to eject.
There were drawbacks such as the inability to expect safe and reliable dotting.
「問題点を解決するための手段」
この発明は前記従来の課題を解決するために、
一方のシールドマシンによりビツト交換部の前方
又はドツキング部の地山を予め拡大掘削してこの
空間部に固化液を注入し、固化液の固化前に拡大
掘削部にシールドマシンのシールド本体の先端部
を貫入して、固化液が固化した後にビツトを交換
したり、ドツキングしたシールド先端間の固化体
及び機器を除去することにより、安全かつ確実に
ビツト交換或いはドツキング部の貫通施工を行う
ことを可能とした掘進工法を提案するものであ
る。"Means for Solving the Problems" In order to solve the above-mentioned conventional problems, the present invention has the following features:
The ground in front of the bit exchange part or the docking part is previously enlarged and excavated by one of the shield machines, and solidification liquid is injected into this space.Before the solidification liquid solidifies, the tip of the shield body of the shield machine is inserted into the enlarged excavation part. By penetrating the bit and replacing the bit after the solidified liquid has solidified, or removing the solidified material and equipment between the docked shield tips, it is possible to safely and reliably replace the bit or perform penetration work on the docking part. This paper proposes an excavation method based on the following.
「実施例」
以下この発明を図面に示すドツキング施工の実
施例について説明すると、相対方向に掘進する二
基のシールドマシン１，１′によりシールドトン
ネルを構築しながら両側から順次対向方向に掘削
し、一方のシールドマシン１を多少先行して掘進
する。``Example'' Below, an example of docking construction according to the present invention as shown in the drawings will be described.A shield tunnel is constructed using two shield machines 1 and 1' that excavate in opposite directions, and excavation is performed sequentially from both sides in opposite directions. One of the shield machines 1 is excavated somewhat in advance.
そして、先行のシールドマシン１がドツキング
部の近辺に到達したとき、回転カツター２の外周
の拡大カツター３を伸張して断面を拡大しながら
ドツキング部近辺を掘削する。 When the preceding shield machine 1 reaches the vicinity of the docking part, the enlarging cutter 3 on the outer periphery of the rotary cutter 2 is extended to enlarge the cross section while excavating the vicinity of the docking part.
このようして所要区間の拡大掘削部４の掘削完
了後、先行のシールドマシン１のシールド本体５
の内部から回転カツター２に設けた注入路６に泥
水固化液を圧送して周囲の複数の吐出口７から拡
大掘削部４内に注入すると共に、拡大カツター３
を収縮した上で回転カツター２を回転させて固化
液を攪拌しながら後退し、シールド本体５のバル
クヘツド内に収納する。 After completing the excavation of the enlarged excavation section 4 in the required section in this way, the shield body 5 of the preceding shield machine 1 is
The solidified mud liquid is pumped from the inside of the rotary cutter 2 to an injection path 6 provided in the rotary cutter 2, and is injected into the enlarged excavation part 4 from a plurality of surrounding discharge ports 7.
After contracting, the rotary cutter 2 is rotated to retreat while stirring the solidified liquid, and is stored in the bulkhead of the shield body 5.
そして、固化液が固化する前に、先行のシール
ドマシン１のシールド本体５をシールドジヤツキ
により推進してその先端部を固化液で満たされた
拡大掘削部４内に貫入し、その後固化液が固化す
ることによりその固化体８と一体化する。 Then, before the solidified liquid solidifies, the shield main body 5 of the preceding shield machine 1 is propelled by a shield jack and its tip penetrates into the enlarged excavation part 4 filled with the solidified liquid, and then the solidified liquid is By solidifying, it becomes integrated with the solidified body 8.
この状態において他側から遅れて掘進してきた
後行のシールドマシン１′により先行のシールド
マシン１のシールド本体５に近接するまで固化体
８を掘進して停止する。 In this state, the trailing shield machine 1', which has dug later from the other side, digs through the solidified body 8 until it approaches the shield body 5 of the preceding shield machine 1, and then stops.
次いで、隔壁９及び回転カツター２などの先端
機材を撤去し、更に固化体８の残部を掘削除去し
て双方のシールドトンネルをドツキングする。 Next, the bulkhead 9 and the cutting-edge equipment such as the rotary cutter 2 are removed, and the remaining part of the solidified body 8 is excavated and removed to dock both shield tunnels.
一方、シールドマシン１，１′の掘進途中にお
いて回転カツター２のビツトを交換する場合に
は、上記第１，２図に示すドツキング部と同様
に、ビツト交換を要する地点においてシールドマ
シン前方の地山を固化体で置換した後、カツター
ビツトの前方の固化体を入力で多少掘削し、掘削
間隙においてカツタービツトの交換作業を行う。 On the other hand, when replacing the bits of the rotary cutter 2 while the shield machines 1 and 1' are digging, it is necessary to replace the bits in the ground in front of the shield machine at the point where the bits need to be replaced, similar to the docking part shown in Figures 1 and 2 above. After replacing the cutter bit with the solidified material, the solidified material in front of the cutter bit is excavated to some extent by input, and the cutter bit is replaced in the excavation gap.
「発明の効果」
シールドマシンの回転カツターにより前方の地
山を拡大掘削し、前記拡大掘削部に固化液を注入
して前記回転カツターを後退し、前記固化液が固
化する前に拡大掘削部にシールドマシンのシール
ド本体の先端部を貫入して固化液の固化体と一体
化するので、ビツト交換部前方又はドツキング部
近辺の地山を所要の強度を有する固化体で置換
し、止水と支持力を強化した上で、ビツト交換作
業又は他側から掘進してドツキングする施工を安
全かつ確実に行うことができると共に、工期、工
費を削減することが可能となる。"Effects of the Invention" A rotary cutter of a shield machine is used to enlarge and excavate the ground in front of the ground, inject solidification liquid into the enlarged excavation part, move the rotary cutter backward, and enter the enlarged excavation part before the solidification liquid solidifies. It penetrates the tip of the shield body of the shield machine and integrates with the solidified solidified liquid, so it replaces the ground in front of the bit exchange part or near the docking part with the solidified material that has the required strength, stopping water and providing support. By strengthening the force, it is possible to safely and reliably perform bit replacement work or excavation and docking work from the other side, and it is also possible to reduce the construction period and cost.
第１図はこの発明によるドツキング部の拡大掘
削の状態を示す縦断側面図、第２図は同固化液に
よる固化状態を示す縦断側面図、第３図は同他側
からの掘進してドツキングした状態を示す縦断側
面図である。
１，１′……シールドマシン、２……回転カツ
ター、３……拡大カツター、４……拡大掘削部、
５……シールド本体、８……固化体、９……隔
壁。
Fig. 1 is a longitudinal side view showing the state of enlarged excavation of the docking part according to the present invention, Fig. 2 is a longitudinal side view showing the state of solidification by the same solidifying liquid, and Fig. 3 is a longitudinal side view showing the state of the docking part being enlarged and excavated by the same solidification liquid. It is a longitudinal side view showing a state. 1, 1'... Shield machine, 2... Rotating cutter, 3... Enlarged cutter, 4... Enlarged excavation section,
5... Shield body, 8... Solidified body, 9... Partition wall.
Claims (1)
地山を拡大掘削し、前記拡大掘削部に固化液を注
入して前記回転カツターを後退し、前記固化液が
固化する前に拡大掘削部にシールドマシンのシー
ルド本体の先端部を貫入することを特徴とする密
閉型シールドマシンによる掘進工法。1 Enlarge and excavate the ground in front with the rotary cutter of the shield machine, inject solidification liquid into the enlarged excavation part, move the rotary cutter backward, and before the solidification liquid solidifies, insert the shield of the shield machine into the enlarged excavation part. An excavation method using a sealed shield machine that penetrates the tip of the main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25619386A JPS63110394A (en) | 1986-10-28 | 1986-10-28 | Method of propulsion construction by sealed type shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25619386A JPS63110394A (en) | 1986-10-28 | 1986-10-28 | Method of propulsion construction by sealed type shield machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63110394A JPS63110394A (en) | 1988-05-14 |
| JPH0528316B2 true JPH0528316B2 (en) | 1993-04-23 |
Family
ID=17289200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25619386A Granted JPS63110394A (en) | 1986-10-28 | 1986-10-28 | Method of propulsion construction by sealed type shield machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63110394A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07109157B2 (en) * | 1989-03-02 | 1995-11-22 | 株式会社熊谷組 | Ground improvement method using shield machine |
| JPH0774588B2 (en) * | 1989-07-11 | 1995-08-09 | 株式会社大林組 | Underground tunnel joint method |
-
1986
- 1986-10-28 JP JP25619386A patent/JPS63110394A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63110394A (en) | 1988-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |