JPH0252759B2 - - Google Patents
Info
- Publication number
- JPH0252759B2 JPH0252759B2 JP6519983A JP6519983A JPH0252759B2 JP H0252759 B2 JPH0252759 B2 JP H0252759B2 JP 6519983 A JP6519983 A JP 6519983A JP 6519983 A JP6519983 A JP 6519983A JP H0252759 B2 JPH0252759 B2 JP H0252759B2
- Authority
- JP
- Japan
- Prior art keywords
- shield machine
- construction method
- jet
- pipe
- shield
- 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
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000009412 basement excavation Methods 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims 1
- 239000010802 sludge Substances 0.000 description 8
- 238000005192 partition Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010586 diagram 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
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】
この発明は、密閉型シールド工法によるトンネ
ルの掘削に当り、対向する両トンネル相互間の地
中接合部の外周を流体噴射によつて撹拌掘削した
後固結剤等改良土を注入して止水、土留を行う工
法において、シールド機械内部からの相互のジエ
ツトパイプの先端を対向するシールド機械の外側
に達するように斜めに挿入することによつてシー
ルド機械の対向する端部の外側に接する部分の土
砂を確実に撹拌掘削することを特徴とするもので
ある。Detailed Description of the Invention The present invention involves the excavation of a tunnel using a closed shield method, and after stirring and excavating the outer periphery of the underground joint between two opposing tunnels using a fluid injection, improving the solidifying agent, etc. In a construction method that injects soil to stop water and retain earth, opposing ends of the shield machine are inserted diagonally so that the tips of mutual jet pipes from inside the shield machine reach the outside of the opposing shield machine. The feature is that the earth and sand in the area in contact with the outside of the excavation area are reliably stirred and excavated.
密閉型シールド機械によるトンネルの掘削工法
において地中接合を行う場合に、例えば先ず接合
地点を薬液注入または凍結工法によつて土質の改
良を行つた後シールド機械を推進させてから両方
のシールド機械同士を接合する工法が一般に行わ
れているが、薬液注入工法の場合は、その周辺の
土質の構成が均一でないために注入された薬液が
地盤中に均等に浸透されないので必要以上に広範
囲にかつ多量の薬液を注入する必要がある等土質
の改良に多くの手数と費用を要する欠点がある。 When performing underground joints in a tunnel excavation method using a sealed shield machine, for example, first the soil quality is improved at the joint point by chemical injection or freezing method, then the shield machine is propelled, and then both shield machines are connected to each other. However, in the case of the chemical injection method, the surrounding soil composition is not uniform, so the injected chemical does not penetrate into the ground evenly, so it is spread over a wider area and in larger quantities than necessary. There are drawbacks such as the need to inject chemical solutions, which require a lot of effort and expense to improve the soil quality.
このような欠点を除去するために本発明者は、
さきに第５図に示すようにシールド機械本体Ａの
前部に設けた隔壁Ｂの周囲にジエツトパイプ挿入
孔Ｃを設け、これよりジエツトパイプＤを挿して
その先端よりシールド機械の外方に向つて圧力水
を射出してその周囲をジエツト掘削して接合する
工法を開発したが、本発明は、この工法における
ジエツトパイプによる圧力流体の射出手段を改良
して更に効率よく土留、止水の環状帯を形成して
安全に接合作業を行うようにしたもので、その実
施態様を図面について説明すれば、第１図ないし
第４図において１はシールド機械本体にして、そ
の前部に隔壁２を設けその中心の軸受３によつて
回転軸４を支承し、その先端に、隔壁２との間に
隔室５を介して掘削刃を備えた掘削盤６を固定
し、この回転軸４をモーター７によつて回転する
ようにしたものである。而して前記隔壁２の周囲
には後記するジエツトパイプを、特に先方斜め外
方に挿通するための適当数の孔８…を設け、これ
にシールド機械の掘進時には蓋体９を通して閉鎖
するようにしたものである。而して前記隔壁２と
掘削盤６の間の隔室５には排泥ポンプ１０を備え
た送泥管１１を連通したものである。 In order to eliminate such drawbacks, the inventors
First, as shown in Fig. 5, a jet pipe insertion hole C is provided around the partition wall B provided at the front of the shield machine body A, and a jet pipe D is inserted through this hole to apply pressure toward the outside of the shield machine from its tip. A construction method has been developed in which water is injected and the surrounding area is jet excavated for joints.The present invention improves the means for injecting pressurized fluid using jet pipes in this construction method to more efficiently form earth retaining and water-stopping annular zones. The embodiment is explained with reference to the drawings. In Figures 1 to 4, 1 is a shield machine body, and a partition wall 2 is provided at the front part of the main body of the shield machine. A rotary shaft 4 is supported by a bearing 3, and an excavating disk 6 equipped with a digging blade is fixed to the tip of the rotary shaft 4 through a partition 5 between it and the partition wall 2, and this rotary shaft 4 is driven by a motor 7. It is designed so that it can be rotated. An appropriate number of holes 8 are provided around the partition wall 2 for inserting jet pipes, which will be described later, particularly diagonally outward, and the holes 8 are closed by passing the lid 9 through them when the shield machine is digging. It is something. A mud feeding pipe 11 equipped with a mud removal pump 10 is connected to the compartment 5 between the partition wall 2 and the excavation board 6.
以上のように構成したシールド機械によるトン
ネルの掘削接合工法を説明すれば、先ず隔壁２に
設けた各孔８に蓋体９を施こし、掘削盤６を回転
しながらシールド機械を掘進しつつ掘削泥土は排
泥ポンプ１０によつて送泥管１１を経て後方に排
出する。このようにして両方のシールド機械１，
１が所定の接合位置近くに到達した後隔室５内に
送泥管１１を利用して適当な固結剤１２を充填固
結させる。次いで孔８に施こした蓋体９を外して
この孔８に削孔機を挿通して隔室５内の固結剤１
２および掘削盤６を通して対向するシールド機械
１の端部外側に向う斜め外向の削孔１３を設けて
再び蓋体９を施こす。この作業をすべての孔８に
対して行う。次いでこの孔８の一つの蓋体９を外
してこれより削孔１３を通してバルブ１４を備え
た排泥管１５を取りつけると共にこの排泥管１５
に接近した孔８の蓋体９を外してこれより削孔１
３を通してジエツトパイプ１６を挿通してその先
端を図示するように対向するシールド機械の端部
外側に達するように設定した後水その他適当な流
体を噴出して周囲をジエツト掘削しながら排泥管
１５を経て掘削土を排出するものである。このよ
うにして予定の掘削を行つた後排泥管１５のバル
ブ１４を閉鎖してジエツトパイプ１６またはこれ
と入れ替えた別のパイプより薬液、モルタルその
他適当な固結剤１７を注入して掘削によつて生じ
た空洞を充填する。このような作業を各孔８につ
いて順次行つて固結剤による不崩壊性の土留、止
水の環状帯を形成するのであるが、本発明におい
てはこの固結剤を注入する空洞を掘削しかつこれ
に固結剤を注入するパイプを斜め外向の削孔１３
より挿入してその先端をシールド機械の端部外側
Ａ部に突出させるために、内部からの噴射流体の
環流による撹拌掘削し難いＡ部分も直接ジエツト
掘削することができると共に、固結剤も完全に充
填することができる。このようにシールド機械
１，１の接合部外周の土留および止水工作を行つ
た後両方のシールド機械内の隔壁２，２を撤去し
て隔室５内の周結剤１２、掘削盤６および両シー
ルド機械間の土砂等を撤去して両方のトンネルを
連通するものである。 To explain the tunnel excavation and joining method using the shield machine configured as described above, first, a cover body 9 is applied to each hole 8 provided in the bulkhead 2, and the shield machine excavates while rotating the excavation board 6. The mud is discharged rearward by a mud pump 10 through a mud pipe 11. In this way both shield machines 1,
1 reaches near a predetermined joining position, a suitable solidifying agent 12 is filled and solidified into the compartment 5 using the mud feeding pipe 11. Next, the cover 9 applied to the hole 8 is removed, and a hole drilling machine is inserted into the hole 8 to remove the solidifying agent 1 in the compartment 5.
A diagonally outward drilling hole 13 is made toward the outside of the opposite end of the shield machine 1 through the shield machine 2 and the excavation plate 6, and the cover body 9 is applied again. This operation is performed for all holes 8. Next, the lid 9 of one of the holes 8 is removed, and the sludge draining pipe 15 equipped with the valve 14 is installed through the drilled hole 13.
Remove the cover 9 of the hole 8 that is close to the hole 8 and drill the hole 1 from this point.
After inserting the jet pipe 16 through the sludge pipe 16 through the sludge pipe 15 and setting its tip so that it reaches the outside of the end of the opposing shield machine as shown in the figure, water or other suitable fluid is jetted out and the sludge pipe 15 is jet-excavated around the sludge pipe 15. The excavated soil is then discharged. After the scheduled excavation is completed in this way, the valve 14 of the mud drain pipe 15 is closed, and chemical solution, mortar, or other suitable solidifying agent 17 is injected through the jet pipe 16 or another pipe replaced with the jet pipe 16, and the excavation is started. Fill the resulting cavity. These operations are carried out sequentially for each hole 8 to form an indestructible earth retainer and a water-tight annular zone using the solidifying agent, but in the present invention, a cavity into which the solidifying agent is injected is excavated and A hole 13 is drilled diagonally outward for the pipe into which the solidifying agent is injected.
In order to insert it further and make its tip protrude to the outside of the end of the shield machine, it is possible to directly jet excavate the A part, which is difficult to excavate with stirring due to the circulation of the jetted fluid from inside, and the solidifying agent is completely removed. can be filled. After performing earth retaining and water stop work around the joints of the shield machines 1 and 1 in this way, the bulkheads 2 and 2 in both shield machines were removed and the surrounding binder 12 in the compartment 5, the excavation board 6 and The purpose is to remove earth and sand between both shield machines and connect both tunnels.
以上のように本発明工法によれば、トンネルを
構築する際両方のシールド機械によつて掘削した
接合位置の外周の土留、止水のための環状帯を形
成するのにその内部からジエツトパイプからの噴
射流体を、対向するシールド機械の外側において
噴出することによつて両方のシールド機械の外面
に亘つて全面的にジエツト掘削されるばかりでな
く、その後の固結剤の注入も十分に行き亘つて土
留、止水の効果も大きく爾後の作業を安全に行う
ことができる等格別の効果特徴がある。 As described above, according to the construction method of the present invention, when constructing a tunnel, the earth retaining around the outer periphery of the joint position excavated by both shield machines and the annular band for water stopping are formed, and the jet pipe is removed from inside the ring. By ejecting the jet fluid on the outside of the opposing shield machines, not only is the jet excavated completely over the exterior surfaces of both shield machines, but the subsequent injection of consolidation agent is also thoroughly distributed. The earth retaining and water stopping effects are also very effective and the subsequent work can be carried out safely.
第１図は本発明工法に使用するシールド機械の
一実施例の切断側面図、第２図は第１図Ｘ−
X′切断正面図、第３図は本発明の実施態様の切
断側面図、第４図は第３図Ｙ−Y′切断正面図、
第５図は改良前の工法の説明図である。
１……シールド機械本体、２……隔壁、３……
軸受、４……回転軸、５……隔室、６……掘削
盤、７……モーター、８……孔、９……蓋本、１
０……排泥ポンプ、１１……送泥管、１２……固
結剤、１３……削孔、１４……バルブ、１５……
排泥管、１６……ジエツトパイプ、１７……固結
剤。
Figure 1 is a cutaway side view of an embodiment of the shield machine used in the construction method of the present invention, and Figure 2 is the figure 1
3 is a cutaway side view of an embodiment of the present invention; FIG. 4 is a cutaway front view taken along line Y-Y′ in FIG. 3;
Figure 5 is an explanatory diagram of the construction method before improvement. 1... Shield machine body, 2... Bulkhead, 3...
Bearing, 4... Rotating shaft, 5... Compartment, 6... Drilling board, 7... Motor, 8... Hole, 9... Lid, 1
0... Sludge pump, 11... Sludge feed pipe, 12... Consolidating agent, 13... Hole drilling, 14... Valve, 15...
Sludge drain pipe, 16...jet pipe, 17...solidifying agent.
Claims (1)
り、両トンネル相互の接合近接位置において、シ
ールド機械内より隔壁を通して挿入したジエツト
パイプよりの流体噴射によつて接合位置の外周の
土砂を掘削、排土してこの部分に固結剤を注入し
て不崩壊性の環状帯を形成した後隔壁、掘削盤お
よび土砂を排除して両者を貫通接合する工法にお
いて、ジエツトパイプを対向するシールド機械の
端部外側に達するように互いに斜めに挿入して噴
射撹拌しまたはジエツト掘削しながら排泥するこ
とを特徴とする密閉型シールド工法におけるトン
ネルの地中接合工法。1. When excavating a tunnel using a sealed shield machine, at a position close to the joint between both tunnels, the earth and sand around the joint position is excavated and removed by jetting fluid from a jet pipe inserted from inside the shield machine through the bulkhead. In this construction method, the bulkhead, excavation plate, and earth and sand are removed after injecting a solidifying agent into the area to form an indestructible annular zone, and the two are penetrated and joined together. An underground joint construction method for tunnels in a closed type shield construction method, which is characterized by inserting mud diagonally into each other and removing mud while spraying and stirring or jet excavating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6519983A JPS59192194A (en) | 1983-04-15 | 1983-04-15 | Underground connection of tunnel in hermetically closed typeshield construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6519983A JPS59192194A (en) | 1983-04-15 | 1983-04-15 | Underground connection of tunnel in hermetically closed typeshield construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59192194A JPS59192194A (en) | 1984-10-31 |
| JPH0252759B2 true JPH0252759B2 (en) | 1990-11-14 |
Family
ID=13280002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6519983A Granted JPS59192194A (en) | 1983-04-15 | 1983-04-15 | Underground connection of tunnel in hermetically closed typeshield construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59192194A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62220694A (en) * | 1986-03-20 | 1987-09-28 | 石川島播磨重工業株式会社 | Hollow center shaft type shield excavator |
| JPH0381495A (en) * | 1989-08-22 | 1991-04-05 | Fujita Corp | Method for decomposing mud discharge/pipe of mud pressurizing shield machine |
-
1983
- 1983-04-15 JP JP6519983A patent/JPS59192194A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59192194A (en) | 1984-10-31 |
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