JP3172454B2 - How to extend the pipeline - Google Patents
How to extend the pipelineInfo
- Publication number
- JP3172454B2 JP3172454B2 JP23142396A JP23142396A JP3172454B2 JP 3172454 B2 JP3172454 B2 JP 3172454B2 JP 23142396 A JP23142396 A JP 23142396A JP 23142396 A JP23142396 A JP 23142396A JP 3172454 B2 JP3172454 B2 JP 3172454B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- plug
- valve
- storage
- compressed air
- 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 - Lifetime
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は液体を流通させる管
路の中間部において、一定長さの新設管体を継ぎ足すこ
とにより管路を延長させる方法に関するものであり、特
に、シールド工法によってトンネルを掘削する際に、掘
削土砂を排除するための送排泥管路をシールド機の掘進
に従って延長する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of extending a pipe by adding a new pipe of a predetermined length at an intermediate portion of the pipe through which a liquid flows, and more particularly to a method of extending a tunnel by a shield method. The present invention relates to a method for extending a pipe for sending and discharging mud to remove excavated earth and sand in accordance with the excavation of a shield machine when excavating a rock.
【０００２】[0002]
【従来の技術】シールド工法においては、地上側から立
坑を通じてシールド掘削機のカッタ背面側の掘削土砂貯
留室内に送排泥管路を連通させ、送泥管路を通じて泥水
を土砂貯留室に圧送すると共に排泥管路を通じて泥水と
共に掘削土砂を地上側に排出しているが、これらの送排
泥管路はシールド掘削機の掘進に従って延長させなけれ
ばならない。2. Description of the Related Art In a shield method, a mud line is connected to an excavated sediment storage room on the back side of a cutter of a shield excavator through a shaft from the ground side, and muddy water is pumped to the sediment storage room through a mud line. At the same time, the excavated earth and sand are discharged to the ground side together with the mud through the mud drainage pipe. However, these feed and drain pipes must be extended in accordance with the excavation of the shield excavator.
【０００３】そのため、従来から図８に示すように、シ
ールド掘削機の後方近傍部における送泥管路31と排泥管
路41との適所に管継手部22を設けると共にこの管継手部
22からシールド掘削機寄りの管路部に栓体格納管23を連
結、連通させ、新設管体の継ぎ足し時には、シールド掘
削機を停止させると共に栓体格納管23からシールド掘削
機寄りの管路中に配設した第１バルブ24を閉止する一
方、管継手部部22から立坑寄りの管路中に配設した第２
バルブ25を開放させた状態で上記格納管23内の栓体26の
背面側に圧力水を供給して該圧力水により栓体26を管路
中の上記管継手部22を通過する位置まで移動させ、次い
で第２バルブ25を閉じたのち管継手部を切り離してその
切り離した対向開口端間に一定長さを有する新設管体
（図示せず）を継ぎ足し、しかるのち、第２バルブ25を
開放することにより管路内の泥水圧で栓体26を格納室23
側に移動させて該格納室23から新設管体内の空気を格納
室外に押し出しながら元の位置に復帰させ、第１バルブ
24を開放させたのち、送泥管路31、41に泥水を還流させ
て土砂の排出を行っている。For this reason, as shown in FIG. 8, conventionally, a pipe joint 22 is provided at an appropriate position between a mud feed pipe 31 and a mud discharge pipe 41 near the rear of a shield excavator.
A plug body storage pipe 23 is connected to and communicates with the pipe section near the shield excavator from 22.When the new pipe is added, the shield excavator is stopped and the plug body storage pipe 23 is connected to the pipe section near the shield excavator. The first valve 24 disposed in the pipe is closed, while the second valve disposed in the pipe near the shaft from the pipe joint portion 22 is closed.
With the valve 25 opened, pressurized water is supplied to the back side of the plug 26 in the storage tube 23, and the plug 26 is moved by the pressure water to a position where the plug 26 passes through the pipe joint portion 22 in the pipeline. Then, after the second valve 25 is closed, the pipe joint portion is cut off, and a new pipe (not shown) having a fixed length is added between the cut open ends, and then the second valve 25 is opened. The plug 26 by the muddy water pressure in the pipeline.
To return to the original position while pushing out the air in the newly installed pipe from the storage chamber 23 to the outside of the storage chamber.
After opening 24, the muddy water is returned to the mud lines 31 and 41 to discharge earth and sand.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記の
ような管路の延長方法によれば、栓体26を管継手部側に
移動させる際に、第２バルブ25を開放して立坑側まで配
管している管路内の泥水をその水頭圧に抗して押し上げ
ながら栓体26を押し進めなければならないために上記圧
力水による栓体26の押圧力を大きくしなければならず、
装置全体が大型化して高価につくばかりでなく、栓体26
が管継手部を通過した位置まで移動したことを確認する
ことが困難であり、さらに、管継手部22を切り離すと、
栓体26と格納管23との間の管路部内の圧力水がトンネル
内に流出し、その処理作業を必要とする等の問題点があ
った。However, according to the above-described method of extending the pipeline, when the plug 26 is moved to the pipe joint side, the second valve 25 is opened to connect the pipe to the shaft. Since the plug 26 must be pushed forward while pushing up muddy water in the pipeline against its head pressure, the pressing force of the plug 26 by the above-mentioned pressurized water must be increased,
Not only is the entire device bulky and expensive, but also the plug 26
It is difficult to confirm that has moved to the position where it has passed the pipe joint, and furthermore, when the pipe joint 22 is cut off,
There is a problem that the pressurized water in the pipe portion between the plug 26 and the storage pipe 23 flows out into the tunnel and requires a processing operation.
【０００５】本発明はこのような問題点に鑑みてなされ
たもので、その目的とするところは管路の中間部に設け
た管継手部に対する新設管体の継ぎ足しのための準備操
作が容易に且つ確実に行えると共に管継手部を切り離し
ても泥水等がトンネル内に漏出する虞れのない管路の延
長方法を提供するにある。The present invention has been made in view of such a problem, and an object of the present invention is to easily perform a preparation operation for adding a new pipe to a pipe joint provided at an intermediate portion of a pipe. Another object of the present invention is to provide a method of extending a pipeline which can be performed reliably and has no risk of muddy water leaking into the tunnel even when the pipe joint is cut off.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明の管路の延長方法は、液体流動管路中に設けた
管体継手部の前方近傍部の管路に第１バルブを設けると
共に後方側の管路に第２バルブを設け、これらの第１バ
ルブと第２バルブ間の管路部において、第１バルブ側に
該管路部に連通する第１栓体の格納管を設ける一方、第
２バルブ側に第３バルブを介して該管路部に連通する第
２栓体の格納管を設け、管体の継ぎ足し時には上記第
１、第２バルブを閉止すると共に第３バルブを開放した
のち、第１栓体側の格納管に圧縮空気を供給して該第１
栓体を上記管体継手部を通過した管路部内まで移動さ
せ、次いで、管体継手部を切り離してその切り離した対
向開口端間に一定長さを有する新設管体を継ぎ足し、し
かるのち、第２栓体を管路部側に移動させることによ
り、該第２栓体の格納管内と管路部内に充満している液
体を押し戻してその押圧力により上記第１栓体を新設管
体側に移動させ、次いで、第１、第２バルブを開放して
液体を第２バルブ側から第１バブル側に流動させること
により第１栓体をその格納管内に復帰させることを特徴
とするものである。In order to achieve the above object, a method of extending a pipe according to the present invention is to provide a method for extending a first valve in a pipe near a front portion of a pipe joint provided in a liquid flow pipe. In addition, a second valve is provided in a pipe on the rear side, and in a pipe section between the first valve and the second valve, a storage pipe of a first plug body communicating with the pipe section is provided on the first valve side. On the other hand, a storage pipe for a second plug is provided on the second valve side to communicate with the pipe via a third valve, and when the pipes are added, the first and second valves are closed and the third valve is closed. Is opened, compressed air is supplied to the storage pipe on the first stopper side to make the first
The plug is moved into the pipe section that has passed through the pipe joint, then the pipe joint is cut off, and a new pipe having a fixed length is added between the cut-off facing open ends. By moving the two plugs to the pipe side, the liquid filled in the storage pipe and the pipe part of the second plug is pushed back, and the first plug is moved to the new pipe side by the pressing force. Then, the first and second valves are opened, and the liquid is caused to flow from the second valve side to the first bubble side, thereby returning the first plug to the inside of the storage tube.
【０００７】上記管路の延長方法において、請求項２に
係る発明は、第１栓体を摺動自在に内蔵した格納管の長
さを該第１栓体の長さに略等しく形成していると共に該
格納管の前端側に第１栓体を管体継手部側に押し進める
ための圧縮空気の供給、排気管を連結、連通させた構造
としているものであり、請求項３に係る発明は、第２栓
体を摺動自在に内蔵した格納管の長さを上記第１栓体が
管体継手部を通過するまでの移動長さよりも長く形成し
ていると共に第３バルブに臨ませている前端開口部側に
金網よりなるストッパ部材を張設し、さらに後端側に該
第２栓体の作動用圧縮空気の供給、排気管を連結、連通
させて構造としていることに特徴を有している。なお、
請求項４に記載したように、第１、第２栓体の格納管は
上記第１、第２バルブ間の管路部の端部に対して同一管
軸上に連通させている一方、第１、第２バルブを設けて
いる管路側は上記管路部の端部に対して屈曲状態に配管
されている。In the above-mentioned method of extending a pipeline, the invention according to claim 2 is characterized in that the length of the storage tube in which the first plug is slidably built is substantially equal to the length of the first plug. The supply pipe and the exhaust pipe for pushing and pushing the first plug body toward the pipe joint at the front end side of the storage pipe are connected and communicated with each other. The length of the storage tube in which the second plug is slidably housed is longer than the length of movement of the first plug until it passes through the pipe joint, and is exposed to the third valve. A stopper member made of a wire mesh is stretched on the front end opening side, and a supply and an exhaust pipe for supplying compressed air for operation of the second plug are connected and communicated with the rear end side. are doing. In addition,
As described in claim 4, the storage pipes of the first and second plugs communicate with the end of the pipe section between the first and second valves on the same pipe axis, The pipe side where the first and second valves are provided is piped in a bent state with respect to the end of the pipe section.
【０００８】[0008]
【作用】管継ぎ足し時に第１及び第２バルブを閉止する
と、両バルブ間の管路部に泥水等の液体が封入された状
態となる。なお、この際、第２栓体を格納管の前端部側
のストッパ部材に当接した状態にしておく。この状態に
して第２栓体側の第３バルブを開放したのち、第１栓体
の格納室内に圧縮空気を圧入すると、第１栓体がその圧
気圧によって管路部の封入された液体を後方に押し進
め、該液体が第２栓体の格納室側に流動してその液圧に
より第２栓体が格納室内を後方に移動する。そして、第
１栓体が管路部の管継手部部を通過した位置まで達する
と、第２栓体が格納室の後端面に当接してそれ以上の後
退が阻止され、液圧が上昇して第１栓体が管継継手部を
通過したことを確認し得るので、圧縮空気の圧入を停止
する。When the first and second valves are closed at the time of pipe connection, a liquid such as muddy water is sealed in a pipe portion between the two valves. At this time, the second plug is kept in contact with the stopper member on the front end side of the storage tube. After the third valve on the second plug body side is opened in this state, when compressed air is press-fitted into the storage chamber of the first plug body, the first plug body moves the liquid sealed in the pipe section backward by the pressure and pressure. The liquid flows toward the storage chamber side of the second plug, and the second plug moves rearward in the storage chamber due to the liquid pressure. When the first plug reaches the position where the first plug has passed through the pipe joint, the second plug comes into contact with the rear end face of the storage chamber, whereby further retreat is prevented, and the hydraulic pressure rises. Since it can be confirmed that the first plug has passed through the pipe joint, press-fitting of compressed air is stopped.
【０００９】次いで、管継手部を切り離すと、液体は管
継手部を通過した位置にある第１栓体と第２栓体間の管
路部および第２栓体の格納室内に封入された状態となっ
ていて第１栓体により管継手部の切り離し口から漏出す
るのを阻止される一方、第１栓体が移動してきた前方管
路部側の内部においては空気が存在するだけであるか
ら、液体は何ら漏出するようなことはない。Next, when the pipe joint is cut off, the liquid is sealed in the pipe between the first plug and the second plug at the position passing through the pipe joint and in the storage chamber of the second plug. And the first plug prevents leakage from the outlet of the pipe joint portion, while only air exists in the inside of the front conduit side where the first plug has moved. No liquid leaks out.
【００１０】管継手部の切り離し後、その切り離し口を
新設管体の長さだけ前後方向に離間させ、新設管体の前
後両開口縁を管継手部の対向する切り離し口にそれぞれ
連結して管路部に該新設管体を中継ぎ状態に接続し、管
路を延長させる。しかるのち、第２栓体の格納室に圧縮
空気等の流体を圧入して該第２栓体を金網よりなるスト
ッパ部材に当接するまで前進させると、第１栓体が該第
１栓体と第２栓体間に封入している液圧によって新設管
体内に移動する。After the pipe joint is cut off, the cut-off port is separated in the front-rear direction by the length of the new pipe, and both front and rear opening edges of the new pipe are connected to the opposing cut-off ports of the pipe joint, respectively. The new pipe body is connected to the road section in a splicing state to extend the pipe line. Thereafter, when a fluid such as compressed air is press-fitted into the storage chamber of the second plug and the second plug is advanced until it comes into contact with a stopper member formed of a wire mesh, the first plug is brought into contact with the first plug. It moves into the new pipe by the liquid pressure sealed between the second plugs.
【００１１】次いで第１バルブと第２バルブを開放して
第２バルブ側の後方管路を通じて液体を圧送すると、第
１栓体が新設管体内からさらに前進して元の管路をその
格納管内にまで復帰し、液体は第１バルブを通過して前
方管路側に流通する。なお、次の管体の継ぎ足し時に
は、上記継ぎ足した新設管体の前端側が管継手部となる
ものである。Next, when the first valve and the second valve are opened and the liquid is pumped through the rear pipe on the side of the second valve, the first plug body advances further from the newly installed pipe to move the original pipe into the storage pipe. And the liquid flows through the first valve to the front conduit side. In addition, at the time of adding the next pipe body, the front end side of the newly installed pipe body serves as a pipe joint.
【００１２】[0012]
【発明の実施の形態】次に本発明の具体的な実施例を図
面について説明する。図１はシールド工法によるトンネ
ル掘削時における掘削土砂搬出用送排泥管路の延長方法
を実施するための全体構造の簡略縦断側面図であって、
シールド掘削機12によって立坑13からトンネルＴを掘進
していく際に、公知のように、地上側からシールド掘削
機12の掘削土砂貯留室14まで立坑13とトンネルＴ内を通
じて送泥管路１と排泥管路11を延設し、送泥管路11の前
端を掘削土砂貯留室14に連結、連通させる一方、排泥管
路11の前端を土砂貯留室14内の掘削土砂を排出するスク
リューコンベア15の搬送端に連結、連通させて送泥管路
１により土砂貯留室14に泥水を圧送し、この泥水と共に
掘削土砂をスクリューコンベア15から排泥管路11を通じ
て地上に排出するものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a simplified vertical sectional side view of the entire structure for implementing a method of extending a duct for excavating and transporting excavated earth and sand during tunnel excavation by a shield method,
When the tunnel T is excavated from the shaft 13 by the shield excavator 12, as is known, the mud pipe 1 and the tunnel T extend from the ground side to the excavated sediment storage room 14 of the shield excavator 12 through the tunnel T. A screw that extends the sludge pipe 11 and connects and communicates the front end of the sludge pipe 11 with the excavated sediment storage chamber 14, and discharges the excavated sediment in the sediment storage chamber 14 while connecting the front end of the sludge pipe 11. The muddy water is pumped into the sediment storage chamber 14 by the mud feeding pipe 1 by being connected to and communicated with the transport end of the conveyor 15, and the excavated sediment is discharged from the screw conveyor 15 to the ground through the mud draining pipe 11 together with the muddy water. .
【００１３】さらに、シールド掘削機12の後方近傍部に
おける送排泥管路１、11の前端部側には一定長の伸縮管
16を介装してあり、シールド掘削機12の掘進に従って該
伸縮管16を前方に伸長させながら送排泥管路１、11に泥
水を流通させて土砂を排出するが、伸縮管16が最大伸長
量に達するとシールド掘削機12はそれ以上の掘進ができ
ないので、シールド掘削機12を一旦停止させ、該伸縮管
16の後方近傍部における送排泥管路１、11の管継手部２
を切り離して伸縮管16を前方に収縮させ、切り離した前
後継手部開口縁間に一定長の新設管体Ｐ（図４に示す）
を継ぎ足すことにより送排泥管路１、11を延長させたの
ち、再び、シールド掘削機12によりトンネルＴを掘進す
る。Further, a fixed length telescopic pipe is provided at the front end side of the pipes 1 and 11 near the rear of the shield excavator 12.
The muddy water flows through the pipes 1 and 11 to discharge mud and dirt while the telescopic pipe 16 is extended forward in accordance with the excavation of the shield excavator 12. When the extension amount is reached, the shield excavator 12 cannot perform further excavation.
Pipe joint part 2 of plumbing pipes 1 and 11 near the rear of 16
, The telescopic tube 16 is contracted forward, and a new pipe P having a fixed length is provided between the separated front and rear joint opening edges (shown in FIG. 4).
And then the tunnels T are excavated by the shield excavator 12 again.
【００１４】この管路の延長方法および該方法を実施す
るための構造は送泥管路１と排泥管路11とでは同じであ
るので、以下、送泥管路１について説明する。図２は管
路の延長方法を実施するための全体構造を示すもので、
送泥管路１の前部側、即ち、上記伸縮管16の後方近傍部
に設けている管継手部２から後方側の立坑13までの間の
送泥管路１は直状管路部1aに形成されてあり、管継手部
２から伸縮管16に到る部分は、管継手部２から斜め上方
に傾斜した傾斜管部1bと、該傾斜管部1bの上端から前方
に向かった水平短管部1cと、この水平短管部1cから下方
に向かった垂設管部1dと、この垂設管部1dの下端から上
記伸縮管16の後端に連結、連通した水平管部1eとから構
成されている。Since the method of extending the pipeline and the structure for carrying out the method are the same for the mud feeding pipeline 1 and the mud draining pipeline 11, the mud feeding pipeline 1 will be described below. FIG. 2 shows the overall structure for implementing the method of extending a pipeline.
The mud feed pipe 1 between the pipe joint 2 provided at the front side of the mud feed pipe 1, that is, in the vicinity of the rear of the telescopic pipe 16 and the shaft 13 on the rear side, is a straight pipe section 1a. A portion extending from the pipe joint 2 to the telescopic tube 16 is formed by a slanted pipe 1b inclined obliquely upward from the pipe joint 2 and a short horizontal portion extending forward from the upper end of the pipe 1b. A pipe section 1c, a vertical pipe section 1d directed downward from the horizontal short pipe section 1c, and a horizontal pipe section 1e connected to and communicated with the rear end of the telescopic tube 16 from the lower end of the vertical pipe section 1d. It is configured.
【００１５】さらに、水平短管部1cの開口前端にゴム製
の第１栓体３を摺動自在に内蔵している第１格納管４を
連結、連通させている。この第１格納管４は送泥管路１
と同一径に形成されてあり、第１栓体３はその外周面を
第１格納管４と送泥管路１の内周面に密接状態で摺動可
能な形状に形成されている。なお、第１格納管４の長さ
は第１栓体３を収納しておくに必要な長さであればよ
く、図２においては第１栓体と略同長に形成している。
又、第１格納管４の開口端に連通した垂設管部1dの上端
部にはエアピンチバルブからなる第１バルブ５を設けて
いる。第１格納管４の前端面は密閉されてあり、その密
閉面に圧縮空気の供給、排気管６の一端を連通させてい
ると共にこの供給、排気管６の他端は切換弁17を介して
コンプレーサ18に連結、連通している。Further, a first storage tube 4 having a rubber-made first plug 3 slidably incorporated therein is connected to and communicated with the opening front end of the horizontal short tube portion 1c. The first storage pipe 4 is connected to the mud feed pipe 1
The first plug 3 is formed in such a shape that its outer peripheral surface can be slid in close contact with the inner peripheral surface of the first storage pipe 4 and the inner wall of the mud duct 1. In addition, the length of the first storage tube 4 may be a length necessary to store the first plug 3, and in FIG. 2, it is formed to be substantially the same length as the first plug.
Further, a first valve 5 composed of an air pinch valve is provided at an upper end of the vertical pipe 1d communicating with an opening end of the first storage pipe 4. The front end face of the first storage pipe 4 is sealed, and supply of compressed air and one end of an exhaust pipe 6 are communicated with the sealed face, and the other end of the supply and exhaust pipe 6 is connected via a switching valve 17. It is connected to and communicates with the compensator 18.
【００１６】一方、立坑13の底部側に位置する送泥管路
１の上記直状管路部1aの後端部は上向き屈曲管部1fに形
成されてあり、この屈曲管部1fを介して立坑13内を通じ
て地上側にまで配管された垂直管路部1gを有している。
７はこの垂直管路部1gの下端部に設けたエアピンチバル
ブからなる第２バルブである。さらに、直状管路部1aの
後端から屈曲管部1fに対して分岐した短管部1hを後方に
向かって直状管路部1aと同一管軸上に突設してあり、こ
の後端開口縁にはゴム製の第２栓体８を摺動自在に内蔵
している第２格納管９が該短管部1hの延長方向に連結、
連通している。10は短管部1hに設けた第３バルブであ
る。On the other hand, the rear end of the straight pipe section 1a of the mud feeding pipe line 1 located on the bottom side of the shaft 13 is formed as an upward bent pipe section 1f. It has a vertical pipeline 1g that is piped to the ground side through the shaft 13.
Reference numeral 7 denotes a second valve formed by an air pinch valve provided at the lower end of the vertical conduit 1g. Further, a short pipe portion 1h branched from the rear end of the straight pipe portion 1a to the bent pipe portion 1f projects rearward on the same pipe axis as the straight pipe portion 1a. A second storage tube 9 having a rubber-made second stopper 8 slidably incorporated in the end opening edge is connected in the extension direction of the short tube portion 1h.
Communicating. Reference numeral 10 denotes a third valve provided in the short pipe section 1h.
【００１７】第２格納管９の後端面は密閉されてあり、
その密閉面に圧縮空気の供給、排気管19の一端を連通さ
せていると共にこの供給、排気管19の他端は切換弁20を
介してコンプレーサ21に連結、連通している。この第２
格納管９の長さはトンネル前方部側に配設した上記第１
格納管４に連通している傾斜管部1bと水平短管部1cとの
長さの和よりも長く、第１栓体３が管継手部２を通過し
た直後までの長さに略等しい長さに形成され、その前端
開口部には金網よりなる栓体ストッパ部材11を張設して
いる。The rear end face of the second storage tube 9 is sealed,
One end of a supply / exhaust pipe 19 for supplying compressed air is communicated with the sealing surface, and the other end of the supply / exhaust pipe 19 is connected to and communicates with a compressor 21 via a switching valve 20. This second
The length of the containment pipe 9 is the first
The length is longer than the sum of the lengths of the inclined pipe portion 1b and the horizontal short pipe portion 1c communicating with the storage pipe 4, and is substantially equal to the length immediately after the first plug 3 has passed through the pipe joint portion 2. A plug stopper member 11 made of a wire mesh is stretched over the front end opening.
【００１８】以上のように構成した管路構造における管
路の延長方法を説明すると、シールド掘削機12によるト
ンネル掘進時には送泥管路１中に設けている上記第１、
第２バルブ５、７を開放状態にしておくと共に上記第３
バルブ10を閉止させ、第２格納管９内の第２栓体８をス
トッパ部材11に当接した位置に設けておく。この状態で
地上側から送泥管路１を通じて泥水をシールド掘削機12
側に圧送し、掘削された土砂を排泥管路11を通じて地上
側に排出する。A method of extending the pipeline in the pipeline structure configured as described above will be described. When the tunnel excavation by the shield excavator 12 is performed, the first,
The second valves 5 and 7 are kept open, and the third
The valve 10 is closed, and the second plug 8 in the second storage pipe 9 is provided at a position where it comes into contact with the stopper member 11. In this state, the muddy water is passed from the ground side through
And the excavated earth and sand is discharged to the ground side through a mud pipe 11.
【００１９】シールド掘削機12によって一定長のトンネ
ルＴが掘削されて送泥管路１を延長する必要が生じた場
合には、シールド掘削機12を停止させると共に送泥管路
１への泥水の圧送を止めたのち第１、第２バルブ５、７
を閉止し、さらに、第３バルブ10を開放させると共に第
２格納管９側の圧縮空気供給、排気管19の切換弁20を切
り換えて外気側に連通した状態にする。なお、この第３
バルブ10の開放および切換弁20の切り換えは第１格納管
４内に圧縮空気を供給する時であってもよい。When a tunnel T of a predetermined length is excavated by the shield excavator 12 and it becomes necessary to extend the mud line 1, the shield excavator 12 is stopped and muddy water to the mud line 1 is stopped. After stopping the pumping, the first and second valves 5, 7
Is closed, the third valve 10 is opened, and the switching valve 20 of the compressed air supply / exhaust pipe 19 on the second storage pipe 9 side is switched to communicate with the outside air. Note that this third
The opening of the valve 10 and the switching of the switching valve 20 may be performed when compressed air is supplied into the first storage pipe 4.
【００２０】上記第１ 第２バルブ５、７を閉止する
と、これらのバルブ５、７間の送泥管路部内に泥水が封
入された状態となる。この状態から第１格納管４の前端
内にコンプレッサ18を駆動することによって供給、排気
管６を通じて圧縮空気を供給すると、第１格納管４内に
内蔵している第１栓体３の前面がその圧気により押圧さ
れて該第１栓体３は第１格納管４に連通している上記水
平短管部1c内へと送り出される。When the first and second valves 5 and 7 are closed, muddy water is sealed in a mud feed pipe between the valves 5 and 7. In this state, when the compressor 18 is driven into the front end of the first storage pipe 4 and compressed air is supplied through the exhaust pipe 6, the front surface of the first plug body 3 built in the first storage pipe 4 is changed. The first plug 3 is pushed by the compressed air and is sent out into the horizontal short pipe portion 1c communicating with the first storage pipe 4.
【００２１】この際、上述したように第２格納管９側の
第３バルブ10を開放すると共に切換弁20を介して圧縮空
気供給、排気管19を外気に連通させた状態にすると、第
１栓体３が圧縮空気の押圧力によって水平短管部1cから
傾斜管部1b内を後方に押し進められるに従って上記封入
された泥水の液圧により第２栓体８が第２格納管９の後
方側に移動し、この第２格納管９内に第１栓体３の移動
量に応じた量の泥水を充填させる。なお、第２格納管９
内を後退する第２栓体８の背面側の空気は供給、排気管
19を通じて外部に排出される。At this time, as described above, when the third valve 10 on the second storage pipe 9 side is opened and the compressed air supply and the exhaust pipe 19 are connected to the outside air via the switching valve 20, the first As the plug 3 is pushed backward from the short horizontal tube 1c to the inside of the inclined tube 1b by the pressing force of the compressed air, the second plug 8 is moved rearward of the second storage tube 9 by the liquid pressure of the sealed muddy water. The second storage pipe 9 is filled with muddy water in an amount corresponding to the amount of movement of the first plug 3. The second storage tube 9
The air on the back side of the second plug body 8 which recedes inside is supplied and exhausted.
It is discharged outside through 19.
【００２２】こうして、圧縮空気による押圧力によって
第１栓体３が傾斜管部1bから図３に示すように、管継手
部２を通過して直状管路部1aの前端部内にまで移動する
と、第２栓体８が第２格納管９の後面に当接してそれ以
上の後退が阻止され、従って、その状態から第１栓体３
をさらに後方側に移動させようとすると、第１栓体３と
第２栓体８との対向面間に封入された液圧が上昇すると
共に第１栓体３を押し進める圧縮空気圧も大きくなるの
で、その圧気圧を検出することによって第１栓体３が管
継手部２を通過したことを確認でき、圧縮空気の圧入を
停止するものである。In this way, when the first plug 3 moves from the inclined pipe portion 1b to the inside of the front end of the straight pipe portion 1a through the pipe joint portion 2 as shown in FIG. 3 by the pressing force of the compressed air. , The second plug 8 abuts on the rear surface of the second storage tube 9 to prevent further retreat, so that from this state the first plug 3
Is further moved to the rear side, the pressure of the liquid sealed between the opposing surfaces of the first plug 3 and the second plug 8 increases, and the compressed air pressure for pushing the first plug 3 also increases. By detecting the pressure and pressure, it can be confirmed that the first plug 3 has passed through the pipe joint 2, and the press-in of the compressed air is stopped.
【００２３】しかるのち、直状管路部1aと傾斜管部1bと
の連結部である管継手部２を切り離して直状管路部1aと
傾斜管部1bとを分離させると、第１栓体３と第２栓体８
間に封入されている泥水は管継手部２から後方側の水平
な直状管路部1aと第２格納管９内に封入されていて水頭
圧が生じないので、直状管路部1aの前端部内に内嵌して
いる第１栓体３の背面に対する液圧は直状管路部1aと第
１栓体３との摩擦力よりも小さく、従って、第１栓体３
によって泥水が管継手部２の切り離し口から漏出するの
を阻止される。一方、第１栓体３が移動してきた傾斜管
部1bと水平短管部1c内には空気が存在するだけであり、
水平短管部1cの前端側は第１バルブ５を設けている垂設
管部1dであるから、泥水が傾斜管部1b側に漏出すること
はない。Thereafter, when the pipe joint 2 which is a connecting portion between the straight pipe section 1a and the inclined pipe section 1b is cut off to separate the straight pipe section 1a and the inclined pipe section 1b, the first plug Body 3 and second plug 8
Since the muddy water sealed in between is sealed in the horizontal straight pipe portion 1a on the rear side from the pipe joint portion 2 and the second storage pipe 9 and no head pressure is generated, the muddy water in the straight pipe portion 1a The hydraulic pressure on the back surface of the first plug 3 fitted inside the front end is smaller than the frictional force between the straight pipe portion 1a and the first plug 3, and therefore, the first plug 3
This prevents muddy water from leaking out of the cutout of the pipe joint 2. On the other hand, only air exists in the inclined tube portion 1b and the horizontal short tube portion 1c to which the first plug 3 has moved,
Since the front end side of the horizontal short pipe portion 1c is the vertical pipe portion 1d provided with the first valve 5, muddy water does not leak to the inclined pipe portion 1b side.
【００２４】管継手部２の切り離し後、伸縮管16を収縮
させることによって傾斜管部1b側を新設管体Ｐの長さだ
け前方に移動させ、図４に示すように、離間した傾斜管
部1bと直状管路部1aとの間に新設管体Ｐを介入させてそ
の前後両開口縁を傾斜管部1bと直状管路部1aとの対向開
口縁に連結することにより、送泥管路１の長さを延長す
るものである（図５参照）。After disconnecting the pipe joint 2, the telescopic tube 16 is contracted to move the inclined pipe 1b side forward by the length of the new pipe P, and as shown in FIG. A new pipe P is interposed between the first pipe 1b and the straight pipe section 1a, and the front and rear opening edges thereof are connected to the opposite opening edges of the inclined pipe section 1b and the straight pipe section 1a, so that mud feeding is performed. The length of the pipeline 1 is extended (see FIG. 5).
【００２５】次いで、第１格納管４側の圧縮空気供給、
排気管６の切換弁17を切り換えて外気に連通させる一
方、第２格納室９側の圧縮空気供給、排気管19の切換弁
20をコンプレッサー21側に連通するように切り換えたの
ち、該コンプレッサー21を駆動して第２栓体８を空気圧
によって前進させると、その前進によって第１栓体３と
第２栓短８間に封入している泥水圧が上昇し、該泥水圧
でもって第１栓体３を新設管体Ｐ内に進入させる。この
進入に従って第１栓体３から前方側の管路内の空気は第
１格納管４から圧縮空気供給、排気管６および外気側に
連通するように切り換えた切換弁17を通じて外部に排出
される。こうして、第２栓体８が図６に示すように金網
よりなるストッパー部材11に当接するまで前進すると、
第１栓体３が新設管体Ｐ内の前方部内に達する。Next, supply of compressed air to the first storage pipe 4 side,
The switching valve 17 of the exhaust pipe 6 is switched to communicate with the outside air, while the compressed air supply to the second storage chamber 9 and the switching valve of the exhaust pipe 19 are performed.
After switching the 20 to communicate with the compressor 21 side, when the compressor 21 is driven to advance the second plug 8 by air pressure, the second plug 8 is sealed between the first plug 3 and the second plug short 8 by the advance. The pressure of the mud is rising, and the first plug 3 enters the newly installed pipe P with the mud pressure. In accordance with this approach, the air in the pipe on the front side from the first plug 3 is discharged from the first storage pipe 4 to the outside through the compressed air supply, the exhaust pipe 6 and the switching valve 17 switched to communicate with the outside air side. . In this manner, when the second plug 8 is advanced until it comes into contact with the stopper member 11 made of wire mesh as shown in FIG.
The first plug body 3 reaches the front part inside the new pipe body P.
【００２６】しかるのち、第２バルブ７を開いて立坑13
側から送泥管路１の垂直管路部1g及び屈曲管部1fを通じ
て直状管路部1aの後端側に泥水を圧送すると、新設管体
Ｐ内の第１栓体３はその泥水圧によって傾斜管部1b内を
上昇しながら水平短管部1c内に達すると共に該水平短管
部1cにから前方に直進して図７に示すように、第１格納
管４内に収納される。なお、第２格納管９の長さを傾斜
管部1bと水平短管部1cとの長さの和よりも長くしている
ので、第２栓体８がストッパ部材11に当接すると第１栓
体３を第１格納管４内に収納することもできる。この収
納によって水平短管部1cと伸縮管16側の管路との連通が
可能となり、第１バルブ５を開くことによって泥水がシ
ールド掘削機12側に流動する。Thereafter, the second valve 7 is opened and the shaft 13 is opened.
When the muddy water is pumped from the side to the rear end side of the straight pipe section 1a through the vertical pipe section 1g and the bent pipe section 1f of the mud feed pipe 1, the first plug body 3 in the new pipe body P becomes the mud pressure. As a result, it reaches the inside of the horizontal short tube portion 1c while ascending in the inclined tube portion 1b, and moves straight forward from the horizontal short tube portion 1c to be stored in the first storage tube 4 as shown in FIG. Since the length of the second storage tube 9 is longer than the sum of the lengths of the inclined tube portion 1b and the horizontal short tube portion 1c, when the second plug 8 comes into contact with the stopper member 11, the first storage tube 9 becomes first. The plug 3 can be stored in the first storage tube 4. This storage enables communication between the horizontal short pipe portion 1c and the conduit on the telescopic tube 16 side, and muddy water flows to the shield excavator 12 side by opening the first valve 5.
【００２７】シールド掘削機12が掘進して再び管体を継
ぎ足す必要が生じた場合、上記新設管体Ｐの前端と傾斜
管部1bの後端との継手部が新たな管継手部２となり、上
記同様にして継ぎ足すものである。なお、以上の実施例
においては送泥管路１の延長方法について説明したが、
排泥水管路11側の延長方法についても同様であるのでそ
の説明は省略する。また、管継手部２を切り離した際
に、傾斜管部1b側には水等の液体が存在しないようにす
るために、第１格納室４側に対しては圧縮空気による第
１栓体３の押し進めを行わなければならないが、第２格
納室９側では圧縮空気による第２栓体８の押し進め以外
に、圧力水等の液体による押し進めを採用してもよい。
さらに、以上の実施例においてはシールド工法における
送排泥管路の延長方法を説明したが、シールド工法以外
において液体供給管路や排出管路を延長したい場合にも
本発明方法を用いることができるのは勿論である。When it becomes necessary for the shield excavator 12 to excavate and add pipes again, the joint between the front end of the new pipe P and the rear end of the inclined pipe 1b becomes a new pipe joint 2. , In the same manner as described above. In the above embodiment, the method of extending the mud line 1 has been described.
The same applies to the method of extending the drainage water pipe 11 side, so that the description is omitted. Further, when the pipe joint 2 is cut off, the first plug 3 made of compressed air is provided to the first storage chamber 4 side so that liquid such as water does not exist on the side of the inclined pipe 1b. In the second storage chamber 9 side, in addition to the pushing of the second plug body 8 by the compressed air, pushing by a liquid such as pressurized water may be adopted.
Further, in the above embodiments, the method of extending the feed / discharge pipe line in the shield method has been described. However, the method of the present invention can also be used when it is desired to extend the liquid supply line or the discharge line in other than the shield method. Of course.
【００２８】[0028]
【発明の効果】以上のように本発明の管路の延長方法に
よれば、管継ぎ足し時に第１及び第２バルブを閉止して
両バルブ間の管路部に泥水等の液体を封入し、この状態
にして第１栓体側の格納管に圧縮空気を供給して該第１
栓体を管体継手部を通過した管路部内まで移動させるも
のであるから、管継手部を切り離しても切り離された一
方の管部側が第１栓体によって密閉されて液体が漏出す
るのを確実に防止することができると共に他方の管部内
には液体が存在しないので液体の漏出などは生じること
はなく、従って、漏出した液体の処理作業をなくして管
体の継ぎ足し作業が能率よく円滑に行えるものである。As described above, according to the pipe extension method of the present invention, the first and second valves are closed at the time of pipe connection and liquid such as muddy water is sealed in the pipe section between the two valves. In this state, compressed air is supplied to the storage pipe on the side of the first plug, and the first
Since the plug is moved to the inside of the pipe portion that has passed through the pipe joint, even if the pipe joint is cut off, one of the cut off pipes is sealed by the first plug to prevent the liquid from leaking. Since no liquid is present in the other pipe part, there is no liquid leakage or the like.Therefore, there is no need to process the leaked liquid, and the pipe body refilling work can be performed efficiently and smoothly. You can do it.
【００２９】さらに、上記第１栓体を圧縮空気による押
圧力で管路部内を管継手部側に移動させて液体を後方側
に押し進め、その押し進め量に応じて管路の後方側に設
けた第２栓体をこの第２栓体の格納管内に後退させなが
押し進められた液体を格納管内に収容するものであるか
ら、第１栓体を押し進める圧力が低くても該第１栓体を
確実に管継手部まで移動させることができ、装置全体の
簡易化を図ることができるものである。また、第２栓体
が格納管内の後端面まで後退して該後端面に当接する
と、第１栓体の押圧力が増大するので、これを検出する
ことによって第１栓体が管継手部を通過したことを容易
に且つ確実に知ることができ、管路の延長作業が正確に
行えるものである。Further, the first plug is moved in the pipe section toward the pipe joint by the pressing force of the compressed air to push the liquid backward, and provided on the rear side of the pipe according to the amount of pushing. Since the liquid pushed forward while retracting the second plug into the storage tube of the second plug is stored in the storage tube, even if the pressure for pushing the first plug is low, the first plug is removed. The device can be reliably moved to the pipe joint, and the entire device can be simplified. Further, when the second plug retreats to the rear end face in the storage tube and comes into contact with the rear end face, the pressing force of the first plug increases, and by detecting this, the first plug is connected to the pipe joint. Can be easily and surely known to have passed, and the pipe extension operation can be performed accurately.
【図１】シールド工法における泥水管路の延長方法を説
明するための簡略縦断側面図、FIG. 1 is a simplified longitudinal side view for explaining a method of extending a muddy water pipeline in a shield method,
【図２】泥水を流通させている状態の装置全体の簡略縦
断側面図、FIG. 2 is a simplified longitudinal side view of the entire apparatus in a state where muddy water is circulated,
【図３】第１栓体を後方に移動させた状態の簡略縦断側
面図、FIG. 3 is a simplified vertical sectional side view of a state in which a first plug is moved rearward;
【図４】管継手部を切り離した状態の簡略縦断側面図、FIG. 4 is a simplified vertical sectional side view of a state where a pipe joint portion is separated;
【図５】新設管体を継ぎ足した状態の簡略縦断側面図、FIG. 5 is a simplified vertical cross-sectional side view of a state where a new pipe is added,
【図６】第１栓体を前進移動させた状態の簡略縦断側面
図、FIG. 6 is a simplified vertical sectional side view showing a state where the first plug is moved forward;
【図７】第１栓体を格納管内に戻した状態の簡略縦断側
面図、FIG. 7 is a simplified vertical sectional side view showing a state in which the first plug is returned into the storage tube;
【図８】従来例を説明するための簡略縦断側面図。FIG. 8 is a simplified vertical side view for explaining a conventional example.
１ 送泥管路 ２ 管継手部 ３ 第１栓体 ４ 第１格納管 ５ 第１バルブ ６ 圧縮空気供給、排気管 ７ 第２バルブ ８ 第２栓体 ９ 第２格納管 10 第３バルブ 11 ストッパ部材 DESCRIPTION OF SYMBOLS 1 Mud feed pipe 2 Pipe joint part 3 1st plug 4 1st storage pipe 5 1st valve 6 Compressed air supply and exhaust pipe 7 2nd valve 8 2nd plug 9 2nd storage pipe 10 3rd valve 11 Stopper Element
───────────────────────────────────────────────────── フロントページの続き (72)発明者 門口 達彦 大阪市阿倍野区松崎町２丁目２番２号 株式会社奥村組内 (72)発明者 高島 通男 大阪市阿倍野区松崎町２丁目２番２号 株式会社奥村組内 (56)参考文献 実開 平６−24092（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) E21D 9/06 301 E21D 9/12 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tatsuhiko Kadoguchi 2-2-2 Matsuzakicho, Abeno-ku, Osaka-shi Okumura Gumi Co., Ltd. (72) Inventor Michio Takashima 2-2-2 Matsuzakicho, Abeno-ku, Osaka-shi Okumura Guminai Co., Ltd. (56) References Hikaru 6-24092 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) E21D 9/06 301 E21D 9/12
Claims (4)
方近傍部の管路に第１バルブを設けると共に後方側の管
路に第２バルブを設け、これらの第１バルブと第２バル
ブ間の管路部において、第１バルブ側に該管路部に連通
する第１栓体の格納管を設ける一方、第２バルブ側に第
３バルブを介して該管路部に連通する第２栓体の格納管
を設け、管体の継ぎ足し時には上記第１、第２バルブを
閉止すると共に第３バルブを開放したのち、第１栓体側
の格納管に圧縮空気を供給して該第１栓体を上記管体継
手部を通過した管路部内まで移動させ、次いで、管体継
手部を切り離してその切り離した対向開口端間に一定長
さを有する新設管体を継ぎ足し、しかるのち、第２栓体
を管路部側に移動させることにより、該第２栓体の格納
管内と管路部内に充満している液体を押し戻してその押
圧力により上記第１栓体を新設管体側に移動させ、次い
で、第１、第２バルブを開放して液体を第２バルブ側か
ら第１バブル側に流動させることにより第１栓体をその
格納管内に復帰させることを特徴とする管路の延長方
法。1. A first valve is provided in a pipe near the front of a pipe joint provided in a liquid flow pipe, and a second valve is provided in a pipe on the rear side. In the pipe section between the two valves, the first valve side is provided with a storage tube for the first plug communicating with the pipe section, while the second valve side is connected to the pipe section via a third valve. A storage pipe for the second plug is provided, and when the pipes are added, the first and second valves are closed and the third valve is opened. Then, compressed air is supplied to the storage pipe on the first plug side to supply the compressed air. (1) The plug is moved into the pipe section that has passed through the pipe joint, the pipe joint is cut off, and a new pipe having a fixed length is added between the cut open ends. By moving the second plug to the pipe side, the inside of the storage pipe and the pipe of the second plug is filled. The filled liquid is pushed back and the first plug is moved to the newly installed pipe by the pressing force, and then the first and second valves are opened to flow the liquid from the second valve to the first bubble. The method of extending a pipe line, wherein the first plug body is returned to the inside of the storage pipe by causing the first plug body to return.
長さを該第１栓体の長さに略等しく形成していると共に
該格納管の前端側に第１栓体を管体継手部側に押し進め
るための圧縮空気の供給、排気管を連結、連通させてい
ることを特徴とする請求項１記載の管路の延長方法。2. A storage tube in which a first plug is slidably housed, the length of which is substantially equal to the length of the first plug, and the first plug is provided at the front end of the storage tube. The method for extending a pipeline according to claim 1, wherein a supply and an exhaust pipe of compressed air for pushing the pipe toward the pipe joint are connected and communicated.
長さを上記第１栓体が管体継手部を通過するまでの移動
長さよりも長く形成していると共に第３バルブに臨ませ
ている前端開口部側に金網よりなるストッパ部材を張設
してあり、さらに後端側に該第２栓体の作動用圧縮空気
の供給、排気管を連結、連通させていることを特徴とす
る請求項１記載の管路の延長方法。The length of the storage tube in which the second plug is slidably housed is longer than the length of movement of the first plug before passing through the pipe joint, and the third valve is provided. A stopper member made of a wire mesh is provided on the front end opening side facing the front end, and a supply and exhaust pipe for supplying compressed air for operation of the second plug is connected to the rear end side. The method for extending a pipeline according to claim 1, wherein:
２バルブ間の管路部の端部に対して同一管軸上に連通さ
せている一方、第１、第２バルブを設けている管路側は
上記管路部の端部に対して屈曲状態に配管されているこ
とを特徴とする請求項１記載の管路の延長方法。4. The storage pipes of the first and second plugs communicate with the end of the pipe section between the first and second valves on the same pipe axis, while the first and second containment pipes communicate with each other. 2. The method according to claim 1, wherein the pipe provided with the valve is bent in a bent state with respect to an end of the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23142396A JP3172454B2 (en) | 1996-08-12 | 1996-08-12 | How to extend the pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23142396A JP3172454B2 (en) | 1996-08-12 | 1996-08-12 | How to extend the pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1061391A JPH1061391A (en) | 1998-03-03 |
| JP3172454B2 true JP3172454B2 (en) | 2001-06-04 |
Family
ID=16923354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23142396A Expired - Lifetime JP3172454B2 (en) | 1996-08-12 | 1996-08-12 | How to extend the pipeline |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3172454B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953820B (en) * | 2014-05-08 | 2015-12-09 | 中国铁建重工集团有限公司 | A kind of obturator device for slurry balance shield machine pipeline stretch system |
-
1996
- 1996-08-12 JP JP23142396A patent/JP3172454B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1061391A (en) | 1998-03-03 |
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