JP4372502B2 - Updating apparatus and updating method for existing buried pipe - Google Patents

Updating apparatus and updating method for existing buried pipe Download PDF

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JP4372502B2
JP4372502B2 JP2003330326A JP2003330326A JP4372502B2 JP 4372502 B2 JP4372502 B2 JP 4372502B2 JP 2003330326 A JP2003330326 A JP 2003330326A JP 2003330326 A JP2003330326 A JP 2003330326A JP 4372502 B2 JP4372502 B2 JP 4372502B2
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pipe
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葉 利 康 秋
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Sanwa Kizai Co Ltd
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Description

本発明は、地中に埋設されて老朽化した既設埋設管を新しい埋設管に更新する装置および方法に関し、より詳しくは、更新作業の際に上流側から流れて来る下水や大量の雨水等を地表面に溢出させることなくスムーズに流下させることができるように改良する技術に関する。   The present invention relates to an apparatus and method for renewing an existing buried pipe buried in the ground to a new buried pipe, and more specifically, sewage or a large amount of rainwater flowing from the upstream side during the renewal work. The present invention relates to a technique for improving so that it can flow smoothly without overflowing to the ground surface.

上下水道等を含む各種用途に供される地中埋設管は、経年変化によって老朽化が進むため、適切な時期に新しい埋設管（更新管）に交換する必要がある。このとき、許容流量を増加させるために小径な既設埋設管を撤去し、より大径な埋設管に交換する場合がある。   Underground pipes used for various purposes, including water and sewage systems, etc., are aging due to changes over time, so it is necessary to replace them with new buried pipes (update pipes) at appropriate times. At this time, in order to increase the allowable flow rate, the existing buried pipe having a small diameter may be removed and replaced with a larger diameter buried pipe.

この場合、既設埋設管が埋設されている個所の地盤を地表面から開削して既設埋設管を掘り出した後に新たな管を吊り込んで埋設し直す方法、あるいは図８および図９に示したように地表面に掘設した一方の立坑から他方の立坑へと水平方向に掘進しつつ既設埋設管を撤去して更新管に交換する方法が用いられる。   In this case, the ground where the existing buried pipe is buried is excavated from the ground surface and the existing buried pipe is excavated, and then a new pipe is suspended and buried again, or as shown in FIGS. A method of removing an existing buried pipe and exchanging it with an updated pipe while digging in a horizontal direction from one vertical shaft dug on the ground surface to the other vertical shaft is used.

図８に示した従来の既設埋設の管更新方法においては、既設埋設管１を更新管２に交換するべく地表面Ｇに発進坑３および到達坑４を掘設する。発進坑３の底部に配置された推進機５から前方に延びるスクリュオーガ６およびその先端に設けられているカッタ７は、推進機５の駆動モータ８によって回転駆動される。カッタ７の回転によって破砕された既設埋設管１は円筒状のケーシング９を介して発進坑３側に取り出されて発進坑３の外に除去される。これと同時に、推進機５に設けられている油圧ピストン１０を伸張させることによりシールド管１１および更新管２を前方へと変位させ、既設埋設管１を更新管２に順次交換する。   In the conventional existing buried pipe renewal method shown in FIG. 8, the start pit 3 and the arrival mine 4 are dug on the ground surface G in order to replace the existing buried pipe 1 with the updated pipe 2. A screw auger 6 extending forward from a propulsion device 5 disposed at the bottom of the start pit 3 and a cutter 7 provided at the tip thereof are rotationally driven by a drive motor 8 of the propulsion device 5. The existing buried pipe 1 crushed by the rotation of the cutter 7 is taken out to the start pit 3 side through a cylindrical casing 9 and removed outside the start pit 3. At the same time, the shield pipe 11 and the update pipe 2 are displaced forward by extending the hydraulic piston 10 provided in the propulsion unit 5, and the existing buried pipe 1 is sequentially replaced with the update pipe 2.

既設埋設管１を更新管２に交換する作業の際には、図８中に矢印で示したように上流側の管路１２から下水Ｗが流れて来るが、この下水Ｗが更新作業中の既設埋設管１の内部に浸入しないように既設埋設管１の上流端はパッカー１３等により封止される。到達坑４の底部に溜まった下水Ｗは、到達坑４の底部に設けられている水中ポンプ１４によって汲み上げられ、地表面Ｇから発進坑３へと延びる配管１５を介して移送される。そして、配管１５のうち下流側の管路１６の上流端を封止しているパッカー１７を貫通して延びる部分１５ａを介して下流側の管路１６内へと排水される。   In the operation of replacing the existing buried pipe 1 with the renewal pipe 2, sewage W flows from the upstream pipe 12 as shown by the arrow in FIG. 8, and this sewage W is being renewed. The upstream end of the existing buried pipe 1 is sealed with a packer 13 or the like so as not to enter the inside of the existing buried pipe 1. The sewage W collected at the bottom of the reaching mine 4 is pumped up by a submersible pump 14 provided at the bottom of the reaching mine 4 and transferred via a pipe 15 extending from the ground surface G to the starting pit 3. And it drains in the downstream pipe line 16 through the part 15a extended through the packer 17 which has sealed the upstream end of the downstream pipe line 16 among the piping 15. FIG.

また、図９に示した従来の他の既設埋設管の更新方法においては、シールド管１１の内部に設けられている掘削機１８の回転カッタ１９によって既設埋設管１を順次破砕しつつ、図示されない管路を介して給排水される泥水に乗せて土砂および破砕片を発進坑３の外部に排出する。また、掘削機１８から前方に延びている管路２０はシール機構２１を介して前方に延びており、上流側に溜まっている下水Ｗを吸引する。そして、吸引された下水Ｗは、図示されないポンプに接続されている配管２２の先端部分２２ａを介して下流側管路１６内へと排水される（下記特許文献１を参照）。
特開平７−９８０７７号公報 Further, in the other conventional method of updating the existing buried pipe shown in FIG. 9, the existing buried pipe 1 is not illustrated while being sequentially crushed by the rotary cutter 19 of the excavator 18 provided inside the shield pipe 11. Sediment and crushed pieces are discharged to the outside of the start pit 3 on muddy water supplied and drained through a pipeline. Further, the pipe line 20 extending forward from the excavator 18 extends forward via the seal mechanism 21 and sucks the sewage W accumulated on the upstream side. Then, the sucked sewage W is drained into the downstream pipe line 16 through the tip 22a of the pipe 22 connected to a pump (not shown) (see Patent Document 1 below).
JP 7-98077 A

ところで、図８および図９に示した従来の既設埋設管更新方法においては、上流側の管路１２から流れてくる下水Ｗを下流側管路１６へと排出する必要があり、埋設管更新作業中においても下水Ｗの流れを遮断することができない。   By the way, in the conventional existing pipe renewal method shown in FIGS. 8 and 9, it is necessary to discharge the sewage W flowing from the upstream pipe 12 to the downstream pipe 16, so that the buried pipe renewal work is performed. Even inside, the flow of sewage W cannot be blocked.

しかしながら、既設埋設管１や更新管２に比較すると仮設した配管１５，２２は極めて細いため、降雨に伴って大量の雨水が流れて来ると排水が追いつかず、下水を含んだ雨水が到達坑４から溢出して地表面Ｇを汚濁する。さらには発進坑３内に配置されている推進機５が冠水し、その機構部分が故障することもあった。   However, since the temporary pipes 15 and 22 are very thin compared to the existing buried pipe 1 and the renewed pipe 2, the drainage cannot catch up when a large amount of rainwater flows along with the rain, and the rainwater including the sewage reaches the pit 4 Overflowing from the ground and polluting the ground surface G. Furthermore, the propulsion unit 5 disposed in the start pit 3 may be submerged and the mechanical part may be broken.

そこで本発明の目的は、上流側から流れて来る大量の雨水等を地表面に溢出させることなくスムーズに下流側に流下させることができる既設埋設管の更新装置を提供することにある。   Accordingly, an object of the present invention is to provide an existing buried pipe renewal device capable of smoothly flowing down a large amount of rainwater flowing from the upstream side to the downstream side without overflowing the ground surface.

上記の課題を解決するための請求項１に記載した手段は、
地表面に掘設した発進坑から到達坑へと既設埋設管に沿って前進するカッタ付きのスクリュオーガにより前記既設埋設管を破砕しつつ、前記発進坑内の推進機により更新管を順次推進して前記既設埋設管を更新する装置であって、
前記既設埋設管の内部に敷設される排水管と、
前記到達坑内に流入した下水を汲み上げて前記排水管に排水する排水ポンプと、を備え、
前記スクリュオーガは、
前記更新管の内部で推進される排土用の管状ケーシングと、
前記管状ケーシングの内部において前記推進機により回転駆動される管状スクリュロッドと、
推進方向の前方側と後方側とを連通させる連通部を有しつつ前記カッタを支持する、前記管状スクリュロッドの先端に固定されて一体に回転するカッタヘッドと、
その内周縁と前記管状スクリュロッドの外周面との間に軸線方向から見たときに環状の隙間を開けつつ前記管状ケーシングの内周面に沿って前記管状スクリュロッドの周りに螺旋状に延びるとともに、前記管状スクリュロッドの外周面に突設された支持部材に支持されて前記管状スクリュロッドと一体に回転するスクリュ羽根と、を有し、
前記排水管は、その後端が前記管状スクリュロッドの前端に同軸に接続され、
かつ前記推進機は、前記管状スクリュロッドの後端に同軸に接続されて前記管状スクリュロッドを回転駆動する管状の駆動部を有しており、
前記到達坑内に流入した下水は、前記排水ポンプ、前記排水管、前記管状スクリュロッドおよび前記駆動部を介して前記発進坑側に排水可能であり、
かつ前記到達坑内に流入した大量の雨水は、前記排水管の外周面と前記既設埋設管の内周面との間の隙間、および前記管状スクリュロッドの外周面と前記スクリュ羽根の内周縁との間の隙間を介して前記発進坑側に排水可能に構成されていることを特徴とする。 The means described in claim 1 for solving the above problem is as follows.
While crushing the existing buried pipe by the cutter with a screw auger which advances along the existing buried pipe to reach anti from starting pit was Ho設on the ground surface, sequentially promote update pipe by propulsion unit of the start in the pit A device for updating the existing buried pipe,
A drainage pipe to be laid in the interior of the front Symbol existing buried pipe,
Bei example and a drain pump for draining the drainage pipe pumped down water flowing to the arrival downhole,
The screw auger
A tubular casing for earth removal propelled inside the renewal pipe;
A tubular screw rod that is rotationally driven by the propulsion device inside the tubular casing;
A cutter head fixed to the distal end of the tubular screw rod and rotating integrally, supporting the cutter while having a communication portion for communicating the front side and the rear side in the propulsion direction;
Extends helically around the tubular screw rod along the inner circumferential surface of said tubular casing while opening the annular gap when viewed from the axial direction between the outer peripheral surface of the inner periphery and the tubular screw rod A screw blade supported by a support member projecting from the outer peripheral surface of the tubular screw rod and rotating integrally with the tubular screw rod ;
The drain pipe has a rear end coaxially connected to a front end of the tubular screw rod,
And the propulsion device has a tubular drive unit that is coaxially connected to the rear end of the tubular screw rod and rotationally drives the tubular screw rod ,
The sewage that has flowed into the reaching mine can be drained to the start pit side via the drain pump, the drain pipe, the tubular screw rod, and the drive unit,
In addition, a large amount of rainwater that has flowed into the reaching pit is formed between the outer peripheral surface of the drain pipe and the inner peripheral surface of the existing buried pipe, and the outer peripheral surface of the tubular screw rod and the inner peripheral edge of the screw blade. It is comprised so that it can drain to the said start pit side through the clearance gap between them.

また、上記の課題を解決するための請求項２に記載した手段は、請求項１に記載した既設埋設管の更新装置に対し、前記発進坑内から前記推進機を吊り上げて地上に退避させた後に、前記管状ケーシングの前記発進坑側の端部と下流側の管路とを接続する接続管をさらに備え、
前記到達坑内に流入した大量の雨水を、前記既設埋設管、前記管状スクリュロッドの外周面と前記スクリュ羽根の内周縁との間の隙間、前記管状ケーシング、および前記接続管を介して前記下流側の管路に排水可能に構成されていることを特徴とする。 Further, the means described in claim 2 for solving the above-described problem is that after the propulsion device is lifted from the start pit and retracted to the ground with respect to the existing buried pipe update device described in claim 1 A connection pipe connecting the end of the tubular casing on the start pit side and a downstream pipe line;
A large amount of rainwater that has flowed into the reaching pit is transferred to the downstream side through the existing buried pipe, the gap between the outer peripheral surface of the tubular screw rod and the inner peripheral edge of the screw blade, the tubular casing, and the connecting pipe. It is characterized in that it can be drained into the pipe line.

また、上記の課題を解決するための請求項３に記載した手段は、請求項１に記載した装置を用いて既設埋設管を更新する方法であって、
前記推進機により前記排水管を順次推進して前記既設埋設管の内部に排水管を敷設し、 敷設した前記排水管の後端に前記管状スクリュロッドを接続するとともに前記管状スクリュロッドの後端に前記駆動部を接続し、
前記推進機を用いて前記管状スクリュロッドを回転駆動することにより前記カッタを回転させて前記既設埋設管を破砕しながら前記スクリュ羽根によって前記発進坑側に破砕片を排出し、
前記推進機を用いて前記管状ケーシングおよび前記更新管を順次推進し、
前記到達坑内に流入した下水を前記排水ポンプ、前記排水管、前記管状スクリュロッドおよび前記駆動部を介して前記発進坑側に排水するとともに、
前記到達坑内に流入した大量の雨水は、前記排水管の外周面と前記既設埋設管の内周面との間の隙間、および前記管状スクリュロッドの外周面と前記スクリュ羽根の内周縁との間の隙間を介して前記発進坑側に排水することを特徴としている。 The means described in claim 3 for solving the above problem is a method of updating an existing buried pipe using the apparatus described in claim 1,
The drainage pipe is sequentially propelled by the propulsion unit to lay a drainage pipe inside the existing buried pipe, and the tubular screw rod is connected to the rear end of the drainage pipe and the rear end of the tubular screw rod. Connecting the drive unit,
Rotating the tubular screw rod using the propulsion device to rotate the cutter and crushing the existing buried pipe while discharging the crushed pieces to the start pit side by the screw blades,
The tubular casing and the renewal pipe are sequentially propelled using the propulsion device,
The drainage pump inflow sewage into the reach the pit, the drainage tube, as well as waste water to the starting pit side through the tubular screw rod and the driving unit,
A large amount of rainwater that has flowed into the reaching pit is between the outer peripheral surface of the drainage pipe and the inner peripheral surface of the existing buried pipe, and between the outer peripheral surface of the tubular screw rod and the inner peripheral edge of the screw blade. It is characterized by draining to the start pit side through a gap .

また、請求項４に記載した手段は、請求項３に記載した既設埋設管の更新方法において、前記発進坑内から前記推進機を吊り上げて地上に退避させた後に、
前記管状ケーシングの前記発進坑側の端部と下流側の管路とを接続管を用いて接続し、
前記到達坑内に流入した大量の雨水を、前記既設埋設管、前記管状スクリュロッドの外周面と前記スクリュ羽根の内周縁との間の隙間、前記管状ケーシング、および前記接続管を介して前記下流側の管路に排水することを特徴としている。 Further, means described in claim 4 is the method of updating an existing buried pipe according to claim 3, after backing on the ground lifting the propulsion unit from the start in the pit,
Connecting the end of the tubular casing on the start pit side and the pipe line on the downstream side using a connecting pipe,
A large amount of rainwater that has flowed into the reaching pit is transferred to the downstream side through the existing buried pipe, the gap between the outer peripheral surface of the tubular screw rod and the inner peripheral edge of the screw blade, the tubular casing, and the connecting pipe. It is characterized by draining into a pipe line.

すなわち、従来の既設埋設管の更新装置に用いられているスクリュオーガは、柱状のスクリュロッドの外周面にスクリュ羽根を螺旋状に立設したものである。これにより、スクリュ羽根の内周縁はスクリュロッドの外周面に密着していて両者の間には隙間がない。また、スクリュ羽根の外周縁は、効率的な排土のために管状ケーシングの内周面に接近するように配置されている。
したがって、このような構成の従来のスクリュオーガを介して大量の雨水を排水しようとしても、流れようとする雨水に対する抵抗が大きく、大量の雨水をスムーズに排水することができなかった。
また、スクリュロッドは柱状に延びているので、上流側から到達坑に流入した下水をスクリュロッドを介して発進坑側に排水することはできなかった That is, the screw auger used in the conventional existing buried pipe renewal device has screw blades standing in a spiral manner on the outer peripheral surface of a columnar screw rod. Thereby, the inner peripheral edge of the screw blade is in close contact with the outer peripheral surface of the screw rod, and there is no gap between them. Further, the outer peripheral edge of the screw blade is disposed so as to approach the inner peripheral surface of the tubular casing for efficient soil removal.
Therefore, even if a large amount of rainwater is drained through the conventional screw auger having such a configuration, the resistance to the rainwater to flow is large, and a large amount of rainwater cannot be drained smoothly.
In addition, since the screw rod extends in a columnar shape, it was not possible to drain the sewage that flowed from the upstream side into the reaching mine to the starting mine side via the screw rod.

これに対して、本発明に係る既設埋設管の更新装置に用いるスクリュオーガにおいては、スクリュロッドの外周面と螺旋状に延びるスクリュ羽根の内周縁との間に隙間が開いているから、この隙間を介して大量の雨水を排水することができる。   On the other hand, in the screw auger used for the existing buried pipe updating apparatus according to the present invention, a gap is opened between the outer peripheral surface of the screw rod and the inner peripheral edge of the screw blade extending in a spiral shape. A large amount of rainwater can be drained through.

また、スクリュロッドおよび推進機の駆動部が管状に構成されているから、到達坑内に流入した少量の下水は、到達坑内に設けた排水ポンプ、既設埋設管内に敷設した排水管路、管状のスクリュロッドおよび推進機の管状の駆動部を介して発進坑側にスムーズに排水することができる。 Further, since the driving portion of the screw rod and propulsion device is configured tubular, a small amount flowing into the arrival pit sewage, drainage pump provided to the arrival downhole drainage conduit laid in existing buried pipe, tubular The screw can be smoothly drained to the start pit side through the screw rod and the tubular drive unit of the propulsion unit.

さらに、発進坑内から推進機を吊り上げて地上に退避させた後に、管状ケーシングの発進坑側の端部と下流側の管路とを接続管を用いて接続するから、到達坑内に流入した大量の雨水を、管状ケーシングから接続管を介して下流側の管路へとスムーズに排水することができる。 Furthermore, after backing on the ground lift the propulsion unit from the starting pit, because connecting the ends of the starting pit side of the tubular casing and the downstream side of the pipe with a connecting pipe, a large amount that has flowed to the arrival downhole Can be smoothly drained from the tubular casing to the downstream pipe line via the connecting pipe.

以下、図１乃至図５を参照し、本発明に係る既設埋設管の更新装置および更新方法の一実施形態について詳細に説明する。
なお、以下の説明においては、前述した従来技術と同一の部分には同一の参照符号を用いて重複した説明を省略するとともに推進方向前方を前側と言い、推進方向後方を後側と言う。 Hereinafter, with reference to FIG. 1 thru | or FIG. 5, one Embodiment of the update apparatus and the update method of the existing embedment pipe which concern on this invention is described in detail.
In the following description, the same reference numerals are used for the same parts as those in the above-described prior art, and a duplicate description is omitted, the front in the propulsion direction is referred to as the front side, and the rear in the propulsion direction is referred to as the rear side.

まず最初に図１乃至図３を参照し、本実施形態における既設埋設管の更新装置１００について詳細に説明する。   First, with reference to FIG. 1 thru | or FIG. 3, the update apparatus 100 of the existing underground pipe | tube in this embodiment is demonstrated in detail.

図１に示したように地表面Ｇに掘設した発進坑３の底部には推進機３０が配置されている。
この推進機３０は、後述する排水管５１、スクリュオーガ４０および更新管２等を発進坑３から到達坑４に向かって順次推進するともに、管状スクリュロッド４１を回転駆動する役割を果たす。
また、この推進機３０は、推進方向に延びる管状の駆動部３１を駆動モータ３２によって回転駆動するとともに、推進方向に延びる油圧ピストン３３によって推進板３４を推進方向に往復動させる構造となっている。 As shown in FIG. 1, a propulsion device 30 is disposed at the bottom of the start pit 3 dug in the ground surface G.
The propulsion unit 30 sequentially propels a drain pipe 51, a screw auger 40, an update pipe 2 and the like, which will be described later, from the start pit 3 toward the arrival pit 4, and also serves to drive the tubular screw rod 41 to rotate.
The propulsion device 30 has a structure in which a tubular drive unit 31 extending in the propulsion direction is rotationally driven by a drive motor 32 and the propulsion plate 34 is reciprocated in the propulsion direction by a hydraulic piston 33 extending in the propulsion direction. .

管状の駆動部３１は、その前端に排水管５１および管状スクリュロッド４１の後端をそれぞれ接続するためのフランジ３１ａが設けられ、かつその後端には後述する下流側の排水管６１の前端を接続するためのフランジ３１ｂが設けられている。
なお、この管状の駆動部３１の内径は、排水管５１および管状スクリュロッド４１のそれと同一に設定されている。 The tubular drive unit 31 is provided with a flange 31a for connecting the drain pipe 51 and the rear end of the tubular screw rod 41 at the front end thereof, and the front end of the downstream drain pipe 61 described later is connected to the rear end thereof. A flange 31b is provided.
The inner diameter of the tubular drive unit 31 is set to be the same as that of the drain pipe 51 and the tubular screw rod 41.

既設埋設管１を順次破砕しつつその周囲の土砂と共に発進坑３側に排出するスクリュオーガ４０は、推進機３０の管状駆動部３１の前端に接続されて推進方向に同軸に延びるとともに駆動モータ３２により駆動されて一体に回転する管状のスクリュロッド４１を有している。
この管状スクリュロッド４１の前端に固定されたカッタヘッド４２は、図２に示したように合計４個のディスクカッタ４３を回転自在に支持しているが、その周囲には推進方向の前側と後側とを連通させる隙間（連通部）Ｓ１が設けられている。
カッタヘッド４２は、図示されない支持手段によってシールド管４４の内部に回転自在に支持されている。
シールド管４４の内周面には、推進方向に同軸に延びる管状ケーシング４５の前端がテーパー部４５ａを介して接続されている。
また、管状スクリュロッド４１の周りで螺旋状に延びるスクリュ羽根４６は、図３に示したように、その内周縁４６ａと管状スクリュロッド４１の外周面４１ａとの間に、軸線方向から見たときに環状の隙間Ｓ２が開くように配置されている。
さらにスクリュ羽根４６は、管状スクリュロッド４１の外周面４１ａに突設された細長い支持部材４７によって支持されている。
なお、管状スクリュロッド４１およびスクリュ羽根４６は、推進機３０の油圧ピストン３３のストロークとほぼ等しい長さに寸法決めされており、推進方向に並べて互いにフランジ接続することにより発進坑３側から到達坑４に至る長さに連結することができる。 A screw auger 40 that sequentially crushes the existing buried pipe 1 and discharges it to the start pit 3 side together with the surrounding earth and sand is connected to the front end of the tubular drive unit 31 of the propulsion machine 30 and extends coaxially in the propulsion direction and a drive motor 32. It has a tubular screw rod 41 that is driven by and rotates integrally.
The cutter head 42 fixed to the front end of the tubular screw rod 41 rotatably supports a total of four disc cutters 43 as shown in FIG. A gap (communication portion) S1 that communicates with the side is provided.
The cutter head 42 is rotatably supported inside the shield tube 44 by support means (not shown).
A front end of a tubular casing 45 extending coaxially in the propulsion direction is connected to the inner peripheral surface of the shield tube 44 via a tapered portion 45a.
Further, the screw blade 46 extending spirally around the tubular screw rod 41 is viewed from the axial direction between the inner peripheral edge 46a and the outer peripheral surface 41a of the tubular screw rod 41 as shown in FIG. It arrange | positions so that annular clearance S2 may open.
Furthermore, the screw blades 46 are supported by an elongated support member 47 projecting from the outer peripheral surface 41 a of the tubular screw rod 41.
The tubular screw rod 41 and the screw blade 46 are dimensioned to have a length substantially equal to the stroke of the hydraulic piston 33 of the propulsion device 30, and are arranged in the propulsion direction and connected to each other by flanges to reach the arrival shaft from the start shaft 3 side. It can be connected to a length up to 4.

排水管５１は、推進機３０の管状駆動部３１の前端若しくはスクリュオーガ４０の管状スクリュロッド４１の前端に接続されて、管状駆動部３１および管状スクリュロッド４１と共に排水管路５０を形成する。
排水管５１は、推進機３０の油圧ピストン３３のストロークとほぼ等しい長さに寸法決めされており、推進方向に並べて互いにフランジ接続することにより発進坑３側から到達坑４に至る長さに連結することができる。
また、排水管５１には軸受５２を介して支持腕５３が取り付けられており、排水管５１を既設埋設管１の内部で同軸にかつ推進方向に移動自在に支持している。 The drain pipe 51 is connected to the front end of the tubular drive part 31 of the propulsion device 30 or the front end of the tubular screw rod 41 of the screw auger 40, and forms the drain pipe 50 together with the tubular drive part 31 and the tubular screw rod 41.
The drain pipe 51 is dimensioned to have a length substantially equal to the stroke of the hydraulic piston 33 of the propulsion device 30 and is connected to the length from the start pit 3 side to the arrival pit 4 by being connected to each other in a flanged manner in the propulsion direction. can do.
Further, a support arm 53 is attached to the drain pipe 51 via a bearing 52, and the drain pipe 51 is supported coaxially within the existing buried pipe 1 and movable in the propulsion direction.

また、推進機３０の管状駆動部３１の後端フランジ３１ｂには、排水管５１、管状スクリュロッド４１および管状駆動部３１を介して流下してくる下水を下流側管路１６に排水するための排水管６１を着脱自在に接続することができる。
この排水管６１の後端６１ａは、下流側管路１６の上流端を封止しているパッカー１７を貫通して下流側管路１６の内部に延びて、下水を下流側管路１６内に排水する。 Further, the rear end flange 31b of the tubular drive unit 31 of the propulsion device 30 is for draining sewage flowing down through the drain pipe 51, the tubular screw rod 41, and the tubular drive unit 31 to the downstream pipe line 16. The drain pipe 61 can be detachably connected.
The rear end 61 a of the drain pipe 61 passes through the packer 17 that seals the upstream end of the downstream pipe line 16, extends into the downstream pipe line 16, and sewage into the downstream pipe line 16. Drain.

次に図４乃至図７を参照し、上述した装置１００を用いて既設埋設管１を更新管２に更新する方法について説明する。   Next, a method of updating the existing buried pipe 1 to the update pipe 2 using the above-described apparatus 100 will be described with reference to FIGS.

既設埋設管を更新する作業の第１段階においては、図４に示したように、発進坑３の底部に設けた推進機３の油圧ピストン３３を用いて排水管５１を既設埋設管１の内部に順次推進しつつ、複数の排水管５１を互いにフランジ接続して排水管路５０を完成させる。
また、上流側の管路１２の後端をパッカー１３により封止するとともに、上流側の管路１２内に溜まった下水Ｗ１を水中ポンプ１４で汲み上げつつ、排水管路５０の前端に接続した配管１５を介して排水管路５０内に排水する。
また、排水管路５０の後端は推進機３０の管状駆動部３１に接続する。
さらに、推進機３０の管状駆動部３１の後端には排水管６１を接続する。
これにより、上流側の管路１２から流れてきて溜まった下水Ｗ１は、水中ポンプ１４により汲み上げるとともに排水管路５０、管状駆動部３１および排水管６１を介して下流側の管路１６に排水（Ｗ２）することができる。 In the first stage of the operation of updating the existing buried pipe, as shown in FIG. 4, the drain pipe 51 is installed inside the existing buried pipe 1 by using the hydraulic piston 33 of the propulsion unit 3 provided at the bottom of the start pit 3. The drainage pipes 50 are completed by connecting the plurality of drainage pipes 51 to each other while sequentially propelling them.
Further, the rear end of the upstream pipe 12 is sealed by the packer 13 and the sewage W1 accumulated in the upstream pipe 12 is pumped by the submersible pump 14 and connected to the front end of the drain pipe 50. 15 is drained into the drainage pipe 50.
Further, the rear end of the drain pipe 50 is connected to the tubular drive unit 31 of the propulsion device 30.
Further, a drain pipe 61 is connected to the rear end of the tubular drive unit 31 of the propulsion device 30.
Thereby, the sewage W1 collected from the upstream pipe 12 is pumped up by the submersible pump 14 and drained into the downstream pipe 16 via the drain pipe 50, the tubular drive unit 31 and the drain pipe 61 ( W2).

既設埋設管を更新する作業の第２段階においては、発進坑３の底部に設けた推進機３０の推進板３４を一杯に後退させた後、スクリュオーガ４０および更新管２を発進坑３内に吊り込み、図５に示したように、管状スクリュロッド４１の前端を排水管路５０の後端に接続するとともに、管状スクリュロッド４１の後端を管状駆動部３１の前端に接続する。 次いで、駆動モータ３２を作動させて管状スクリュロッド４１を回転させつつ、油圧ピストン３３を伸張させてスクリュオーガ４０および更新管２を推進する。
これにより、既設埋設管１の後端を管状スクリュロッド４１と一体に回転するディスクカッタ４３によって破砕しつつ、周囲の土砂とともにスクリュ羽根４６によって管状ケーシング４５内を発進坑３内へと搬送して除去することができる。
スクリュオーガ４０および更新管２の推進に伴って排水管路５０の前端が到達坑４内に突出すると、排水管路５０の前端から一つの排水管５１を取り外すとともに、水中ポンプ１４から延びる配管１５の先端を排水管路５０の先端に付け替える。
これにより、既設埋設管１の破砕および更新管２の推進を行いながら、上流側の管路１２から流下してくる下水Ｗ１を下流側の管路１６へと排水（Ｗ２）することができる。 In the second stage of the work of updating the existing buried pipe, the propulsion plate 34 of the propulsion device 30 provided at the bottom of the start pit 3 is fully retracted, and then the screw auger 40 and the update pipe 2 are placed in the start pit 3. As shown in FIG. 5, the front end of the tubular screw rod 41 is connected to the rear end of the drain pipe 50, and the rear end of the tubular screw rod 41 is connected to the front end of the tubular drive unit 31. Next, while driving the drive motor 32 to rotate the tubular screw rod 41, the hydraulic piston 33 is extended to propel the screw auger 40 and the update pipe 2.
As a result, the rear end of the existing buried pipe 1 is crushed by the disk cutter 43 that rotates integrally with the tubular screw rod 41, and the inside of the tubular casing 45 is conveyed into the start shaft 3 by the screw blades 46 together with the surrounding earth and sand. Can be removed.
When the front end of the drainage pipe 50 protrudes into the access pit 4 as the screw auger 40 and the renewal pipe 2 are propelled, one drainage pipe 51 is removed from the front end of the drainage pipe 50 and the pipe 15 extending from the submersible pump 14 is removed. The tip of is replaced with the tip of the drainage pipe 50.
Thereby, the sewage W1 flowing down from the upstream pipe 12 can be drained (W2) to the downstream pipe 16 while crushing the existing buried pipe 1 and propelling the renewal pipe 2.

既設埋設管を更新する作業の第３段階においては、図６に示したように、管状スクリュロッド４１とスクリュ羽根４６、管状ケーシング４５、更新管２を順次接続して推進するとともに、排水管路５０の前端の排水管５１を一つずつ取り外す作業、および水中ポンプ１４から延びる配管１５の先端を排水管路５０の先端に付け替える作業を繰り返し、既設埋設管１を更新管２に更新する作業を完了させる。   In the third stage of the work of renewing the existing buried pipe, as shown in FIG. 6, the tubular screw rod 41, the screw blade 46, the tubular casing 45, and the renewed pipe 2 are sequentially connected and propelled, and the drainage pipe The operation of removing the drain pipes 51 at the front end of each of 50 and the operation of replacing the tip of the pipe 15 extending from the submersible pump 14 with the tip of the drain pipe 50 are repeated to update the existing buried pipe 1 to the update pipe 2. Complete.

ところで、天気予報によって大量の雨水の発生が予想されるときには、図７に示したように、発進坑３の内部から推進機３０を吊り上げて地表Ｇに退避させた後、接続管７０を発進坑３内に吊り込み、接続管７０の外管７１を管状ケーシング４５の後端に接続するとともに、接続管７０の内管７２をスライドさせて下流側の管路１６内に接続する。   By the way, when a large amount of rainwater is predicted by the weather forecast, as shown in FIG. 7, after the propulsion device 30 is lifted from the inside of the start pit 3 and retreated to the ground surface G, the connection pipe 70 is connected to the start pit. 3, the outer pipe 71 of the connection pipe 70 is connected to the rear end of the tubular casing 45, and the inner pipe 72 of the connection pipe 70 is slid and connected to the downstream pipe line 16.

このとき、図２に示したようにカッタヘッド４２には推進方向の前側と後側とを連通させる隙間Ｓ１が設けられており、かつ図３に示したようにスクリュ羽根４６の内周縁４６ａと管状スクリュロッド４１の外周面４１ａとの間に軸線方向から見たときに環状の隙間Ｓ２が開いているから、スクリュオーガ４０の管状ケーシング４５を介して大量の雨水を排水することができる。   At this time, as shown in FIG. 2, the cutter head 42 is provided with a gap S1 for communicating the front side and the rear side in the propulsion direction, and as shown in FIG. Since an annular gap S2 is opened between the outer peripheral surface 41a of the tubular screw rod 41 when viewed from the axial direction, a large amount of rainwater can be drained through the tubular casing 45 of the screw auger 40.

したがって、上流側の管路１２から到達坑４内に流入した大量の雨水は、既設埋設管１、スクリュオーガ４０の管状ケーシング４５および接続管７０を介して下流側の管路内へとスムーズに流下させることができる。   Therefore, a large amount of rainwater that has flowed into the reaching pit 4 from the upstream pipe 12 smoothly flows into the downstream pipe via the existing buried pipe 1, the tubular casing 45 of the screw auger 40, and the connection pipe 70. Can flow down.

なお、上述の説明においては図示左側の管路１２を上流側とし、かつ図示右側の管路１６を下流側としたが、上流と下流の関係が反対の管路についても本発明の装置および方法を適用できることは言うまでもない。   In the above description, the left side pipe 12 shown in the drawing is the upstream side, and the right side pipe 16 is shown on the downstream side. However, the apparatus and method of the present invention are also applicable to pipes having opposite upstream and downstream relationships. It goes without saying that can be applied.

本発明に係る既設埋設管の更新装置の一実施形態を示す縦断面図。The longitudinal cross-sectional view which shows one Embodiment of the update apparatus of the existing buried pipe which concerns on this invention. 図１中に示したＩＩ−ＩＩ破断線に沿った横断面図。The cross-sectional view along the II-II fracture line shown in FIG. 図１中に示したＩＩＩ−ＩＩＩ破断線に沿った横断面図。The cross-sectional view along the III-III break line shown in FIG. 排水管路を介して下水を排水する状態を示す側面断面図。Side surface sectional drawing which shows the state which drains sewage through a drain pipe. 既設埋設管の更新作業を開始した状態を示す側面断面図。Side surface sectional drawing which shows the state which started the update operation | work of the existing buried pipe. 既設埋設管の更新作業が進んだ状態を示す側面断面図。Side surface sectional drawing which shows the state which the update operation | work of the existing buried pipe advanced. 大量の雨水が発生したときの排水状態を示す側面断面図。Side surface sectional drawing which shows the waste_water | drain state when a lot of rainwater generate | occur | produces. 従来の既設埋設管の更新装置を示す側面断面図。Side surface sectional drawing which shows the update apparatus of the conventional existing buried pipe. 従来の既設埋設管の更新装置を示す側面断面図。Side surface sectional drawing which shows the update apparatus of the conventional existing buried pipe.

１ 既設埋設管
２ 更新管
３ 発進坑
４ 到達坑
１２ 上流側の管路
１３ パッカー
１４ 水中ポンプ
１５ 配管
１６ 下流側の管路
１７ パッカー
３０ 推進機
３１ 管状駆動部
３２ 駆動モータ
３３ 油圧ピストン
３４ 推進板
４０ スクリュオーガ
４１ スクリュロッド
４２ カッタヘッド
４３ ディスクカッタ
４４ シールド管
４５ 管状ケーシング
４６ スクリュ羽根
４７ 支持部材
５０ 排水管路
５１ 排水管
５２ 軸受
５３ 支持腕
６１ 排水管
７０ 接続管
７１ 外管
７２ 内管
１００ 本発明に係る既設埋設管の更新装置 DESCRIPTION OF SYMBOLS 1 Existing buried pipe 2 Update pipe 3 Starting pit 4 Arrival mine 12 Upstream side pipe line 13 Packer 14 Submersible pump 15 Pipe 16 Downstream side pipe line 17 Packer 30 Propulsion machine 31 Tubular drive part 32 Drive motor 33 Hydraulic piston 34 Propulsion plate 40 Screw auger 41 Screw rod 42 Cutter head 43 Disc cutter 44 Shield pipe 45 Tubular casing 46 Screw blade 47 Support member 50 Drain pipe 51 Drain pipe 52 Bearing 53 Support arm 61 Drain pipe 70 Connection pipe 71 Outer pipe 72 Inner pipe 100 The apparatus for updating an existing buried pipe according to the invention

Claims (4)

地表面に掘設した発進坑から到達坑へと既設埋設管に沿って前進するカッタ付きのスクリュオーガにより前記既設埋設管を破砕しつつ、前記発進坑内の推進機により更新管を順次推進して前記既設埋設管を更新する装置であって、
前記既設埋設管の内部に敷設される排水管と、
前記到達坑内に流入した下水を汲み上げて前記排水管に排水する排水ポンプと、を備え、
前記スクリュオーガは、
前記更新管の内部で推進される排土用の管状ケーシングと、
前記管状ケーシングの内部において前記推進機により回転駆動される管状スクリュロッドと、
推進方向の前方側と後方側とを連通させる連通部を有しつつ前記カッタを支持する、前記管状スクリュロッドの先端に固定されて一体に回転するカッタヘッドと、
その内周縁と前記管状スクリュロッドの外周面との間に軸線方向から見たときに環状の隙間を開けつつ前記管状ケーシングの内周面に沿って前記管状スクリュロッドの周りに螺旋状に延びるとともに、前記管状スクリュロッドの外周面に突設された支持部材に支持されて前記管状スクリュロッドと一体に回転するスクリュ羽根と、を有し、
前記排水管は、その後端が前記管状スクリュロッドの前端に同軸に接続され、
かつ前記推進機は、前記管状スクリュロッドの後端に同軸に接続されて前記管状スクリュロッドを回転駆動する管状の駆動部を有しており、
前記到達坑内に流入した下水は、前記排水ポンプ、前記排水管、前記管状スクリュロッドおよび前記駆動部を介して前記発進坑側に排水可能であり、
かつ前記到達坑内に流入した大量の雨水は、前記排水管の外周面と前記既設埋設管の内周面との間の隙間、および前記管状スクリュロッドの外周面と前記スクリュ羽根の内周縁との間の隙間を介して前記発進坑側に排水可能に構成されていることを特徴とする既設埋設管の更新装置。 While crushing the existing buried pipe by the cutter with a screw auger which advances along the existing buried pipe to reach anti from starting pit was Ho設on the ground surface, sequentially promote update pipe by propulsion unit of the start in the pit A device for updating the existing buried pipe,
A drainage pipe to be laid in the interior of the front Symbol existing buried pipe,
Bei example and a drain pump for draining the drainage pipe pumped down water flowing to the arrival downhole,
The screw auger
A tubular casing for earth removal propelled inside the renewal pipe;
A tubular screw rod that is rotationally driven by the propulsion device inside the tubular casing;
A cutter head fixed to the distal end of the tubular screw rod and rotating integrally, supporting the cutter while having a communication portion for communicating the front side and the rear side in the propulsion direction;
Extends helically around the tubular screw rod along the inner circumferential surface of said tubular casing while opening the annular gap when viewed from the axial direction between the outer peripheral surface of the inner periphery and the tubular screw rod A screw blade supported by a support member projecting from the outer peripheral surface of the tubular screw rod and rotating integrally with the tubular screw rod ;
The drain pipe has a rear end coaxially connected to a front end of the tubular screw rod,
And the propulsion device has a tubular drive unit that is coaxially connected to the rear end of the tubular screw rod and rotationally drives the tubular screw rod ,
The sewage that has flowed into the reaching mine can be drained to the start pit side via the drain pump, the drain pipe, the tubular screw rod, and the drive unit,
In addition, a large amount of rainwater that has flowed into the reaching pit is formed between the outer peripheral surface of the drain pipe and the inner peripheral surface of the existing buried pipe, and the outer peripheral surface of the tubular screw rod and the inner peripheral edge of the screw blade. An existing buried pipe renewal device, characterized in that it can be drained to the start pit side through a gap therebetween. 前記発進坑内から前記推進機を吊り上げて地上に退避させた後に、前記管状ケーシングの前記発進坑側の端部と下流側の管路とを接続する接続管をさらに備え、After the propulsion device is lifted from the start pit and retracted to the ground, it further includes a connection pipe that connects the end portion on the start pit side of the tubular casing and a pipe line on the downstream side,
前記到達坑内に流入した大量の雨水を、前記既設埋設管、前記管状スクリュロッドの外周面と前記スクリュ羽根の内周縁との間の隙間、前記管状ケーシング、および前記接続管を介して前記下流側の管路に排水可能に構成されていることを特徴とする請求項１に記載した既設埋設管の更新装置。A large amount of rainwater that has flowed into the reaching pit is transferred to the downstream side through the existing buried pipe, the gap between the outer peripheral surface of the tubular screw rod and the inner peripheral edge of the screw blade, the tubular casing, and the connecting pipe. The renewal device for an existing buried pipe according to claim 1, wherein the pipe is configured to be drainable. 請求項１に記載した装置を用いて既設埋設管を更新する方法であって、
前記推進機により前記排水管を順次推進して前記既設埋設管の内部に排水管を敷設し、 敷設した前記排水管の後端に前記管状スクリュロッドを接続するとともに前記管状スクリュロッドの後端に前記駆動部を接続し、
前記推進機を用いて前記管状スクリュロッドを回転駆動することにより前記カッタを回転させて前記既設埋設管を破砕しながら前記スクリュ羽根によって前記発進坑側に破砕片を排出し、
前記推進機を用いて前記管状ケーシングおよび前記更新管を順次推進し、
前記到達坑内に流入した下水を前記排水ポンプ、前記排水管、前記管状スクリュロッドおよび前記駆動部を介して前記発進坑側に排水するとともに、
前記到達坑内に流入した大量の雨水は、前記排水管の外周面と前記既設埋設管の内周面との間の隙間、および前記管状スクリュロッドの外周面と前記スクリュ羽根の内周縁との間の隙間を介して前記発進坑側に排水することを特徴とする既設埋設管の更新方法。 A method for updating an existing buried pipe using the apparatus according to claim 1,
The drainage pipe is sequentially propelled by the propulsion unit to lay a drainage pipe inside the existing buried pipe, and the tubular screw rod is connected to the rear end of the drainage pipe and the rear end of the tubular screw rod. Connecting the drive unit,
Rotating the tubular screw rod using the propulsion device to rotate the cutter and crushing the existing buried pipe while discharging the crushed pieces to the start pit side by the screw blades,
The tubular casing and the renewal pipe are sequentially propelled using the propulsion device,
The drainage pump inflow sewage into the reach the pit, the drainage tube, as well as waste water to the starting pit side through the tubular screw rod and the driving unit,
A large amount of rainwater that has flowed into the reaching pit is between the outer peripheral surface of the drainage pipe and the inner peripheral surface of the existing buried pipe, and between the outer peripheral surface of the tubular screw rod and the inner peripheral edge of the screw blade. A method for renewing an existing buried pipe, wherein the drainage is drained to the start pit side through a gap . 前記発進坑内から前記推進機を吊り上げて地上に退避させた後に、
前記管状ケーシングの前記発進坑側の端部と下流側の管路とを接続管を用いて接続し、
前記到達坑内に流入した大量の雨水を、前記既設埋設管、前記管状スクリュロッドの外周面と前記スクリュ羽根の内周縁との間の隙間、前記管状ケーシング、および前記接続管を介して前記下流側の管路に排水することを特徴とする請求項３に記載した既設埋設管の更新方法。 After retracting the ground by lifting the propulsion unit from the start in the pit,
Connecting the end of the tubular casing on the start pit side and the pipe line on the downstream side using a connecting pipe,
A large amount of rainwater that has flowed into the reaching pit is transferred to the downstream side through the existing buried pipe, the gap between the outer peripheral surface of the tubular screw rod and the inner peripheral edge of the screw blade, the tubular casing, and the connecting pipe. The method for renewing an existing buried pipe according to claim 3, wherein the pipe is drained into the pipe.
JP2003330326A 2003-09-22 2003-09-22 Updating apparatus and updating method for existing buried pipe Expired - Fee Related JP4372502B2 (en)

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