JP2583205B2 - Updating existing buried pipes - Google Patents
Updating existing buried pipesInfo
- Publication number
- JP2583205B2 JP2583205B2 JP6257695A JP25769594A JP2583205B2 JP 2583205 B2 JP2583205 B2 JP 2583205B2 JP 6257695 A JP6257695 A JP 6257695A JP 25769594 A JP25769594 A JP 25769594A JP 2583205 B2 JP2583205 B2 JP 2583205B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- existing buried
- new pipe
- cutting
- new
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、地中に埋設された既設
埋設管を開削工法によることなく、新設管と更新する方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of replacing an existing buried pipe buried underground with a new pipe without using an open-cutting method.
【０００２】[0002]
【従来技術】近年、地中に埋設されている既設埋設管
は、埋設管内を流れる下水による劣化や耐用年数による
老朽化から管路の置換えの必要性が高まってきた。管路
を新しいものに置き換える方法としては、一般には開削
工法が用いられていたが、この工法では既設埋設管を撤
去するためにはその既設管を掘り起こす必要があるの
で、交通事情や生活環境保の問題からも非開削による方
法の要望が高まってきている。最近の技術としては、既
設埋設管に衝撃を加えながら破砕し押し広げながら新し
い管路を置き換えていく衝撃式推進方法や既設埋設を通
常の推進工法のように一端から切削具により完全に切削
したり、破砕しながら推進して新しい管路を置き換えて
いく方法が開発されている。2. Description of the Related Art In recent years, there is an increasing need for replacing existing pipelines because of deterioration of existing buried pipes buried underground due to sewage flowing in the buried pipes and aging due to service life. In order to replace the pipeline with a new one, the open-cutting method was generally used.However, this method requires excavating the existing buried pipe in order to remove the existing buried pipe. Due to the problem described above, there is a growing demand for a non-cutting method. Recent technologies include the impact type propulsion method, which replaces a new pipeline while crushing and expanding the existing buried pipe while applying an impact to the existing buried pipe, or cutting the existing buried pipe completely from one end with a cutting tool like the normal propulsion method. Or a method of propelling while crushing and replacing a new pipeline has been developed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、老朽化
している既設埋設管の状況を見ると、鉄筋コンクリート
管が主であって、上記した衝撃式推進による破砕方法で
は、コンクリート中の鉄筋の切断ができなく、そのまま
の状態で地中に残していく状態となり、道路下等では規
制の上で問題となる。However, looking at the situation of aging existing buried pipes, reinforced concrete pipes are mainly used, and the crushing method by impact type propulsion described above can cut the reinforcing steel in concrete. Instead, it remains in the ground as it is, and there is a problem with regulation under roads and the like.
【０００４】また、一端から既設埋設管を切削したり、
破砕しながら推進する方法においても、コンクリート中
の鉄筋の切削や切断が完全に行えず、切削具に鉄筋が絡
みついて、更新途中で立ち往生することが度々発生し、
更新施工を困難としているのが現状である。[0004] In addition, an existing buried pipe is cut from one end,
Even with the method of propulsion while crushing, cutting and cutting of the reinforcing steel in concrete can not be performed completely, and the reinforcing steel is entangled with the cutting tool and often stuck in the middle of updating,
The current situation is that renewal construction is difficult.
【０００５】そこで本発明は、前記した従来技術の問題
点であるコンクリート中の鉄筋もコクリートとともに完
全に切削して撤去できる更新方法を提供するものであ
る。Accordingly, the present invention provides a renewal method which can completely remove a reinforcing bar in concrete together with cocrete, which is a problem of the prior art described above.
【０００６】[0006]
【発明の構成】すなわち本発明の構成は、既設埋設管端
面の円周方向に所定の間隔をおいて既設埋設管壁面の厚
さよりやや大きめの噴射ノズルを装備した水圧切削手段
と、この水圧切削手段の回転軸に連結して回転力を伝達
する駆動機と、この水圧切削手段の後方に該水圧切削手
段の回転軸と連結して新設管を保持する新管保持手段と
により、既設埋設管端面の壁面を水圧切削手段の噴射ノ
ズルにより順次切削しながら、新設管後端面または新管
保持手段の後部に固定して新設管内に順次連結したケー
シングの後端を押圧して管路を更新する既設埋設管の更
新方法である。That is, according to the present invention, there is provided a hydraulic cutting means equipped with an injection nozzle which is slightly larger than the thickness of the existing buried pipe wall at a predetermined interval in the circumferential direction of the end face of the existing buried pipe, and the hydraulic cutting means. An existing buried pipe is provided by a driving device connected to a rotating shaft of the means and transmitting a rotational force, and a new pipe holding means for connecting the rotating shaft of the hydraulic cutting means and holding a new pipe behind the hydraulic cutting means. While sequentially cutting the wall surface of the end face by the injection nozzle of the hydraulic cutting means, the pipe line is updated by pressing the rear end of the casing fixed to the rear end face of the new pipe or the rear part of the new pipe holding means and sequentially connected to the inside of the new pipe. This is a method of updating existing buried pipes.
【０００７】水圧切削手段の噴射ノズルの構造として
は、既設埋設管壁面の厚さ分だけ高圧水を噴射させる矩
形断面の高圧水ノズルを設け、その高圧水ノズルの外周
部には高圧水とともに噴射させて切削効率を良くするた
めの切削粗砂ノズルが設けられている。切削粗砂ノズル
の外周部には、高圧水ノズルと切削粗砂ノズルで切削さ
れた切削粉を水とともに吸い取り排出する吸引口が設け
られている。As the structure of the injection nozzle of the hydraulic cutting means, a high-pressure water nozzle having a rectangular cross section for injecting high-pressure water by the thickness of the wall surface of the existing buried pipe is provided, and the high-pressure water nozzle is injected together with the high-pressure water on the outer periphery thereof. A cutting coarse sand nozzle is provided for improving cutting efficiency. A suction port for sucking and discharging the cutting powder cut by the high-pressure water nozzle and the cutting coarse sand nozzle together with water is provided at an outer peripheral portion of the cutting coarse sand nozzle.
【０００８】水圧切削手段を回転させる駆動機として
は、噴射ノズルの設置が４ヵ所なら１８０°の左右回転
で、既設埋設管壁面を全周確実に切削することができ
る。また、６ヵ所なら１２０゜左右回転すればよい。[0008] As a driving machine for rotating the hydraulic cutting means, if the injection nozzles are provided at four locations, the entire circumference of the existing buried pipe wall can be reliably cut by 180 ° left / right rotation. In addition, in the case of six places, it is only necessary to rotate 120 ° left and right.
【０００９】新管保持手段は、前方の水圧切削手段の回
転軸に、回転力が伝達されないようにロータリージョイ
ント等により連結されている。新設管の保持方法として
は、新設管を牽引していく場合では、新設管内周面に当
接させた保持リングから新設管の内壁面にボルト等によ
って固定する方法や保持リングを新設管内壁面に嵌合す
る方法が用いられる。新設管の後端面を押圧する場合に
は、新管保持手段の後方外周に新設管外径よりやや大き
めのカラーを設け、嵌設する従来技術を用いればよい。The new pipe holding means is connected to the rotary shaft of the hydraulic cutting means at the front by a rotary joint or the like so as not to transmit a rotating force. When the new pipe is towed, the method of holding the new pipe is to fix it to the inner wall of the new pipe with bolts or the like from the holding ring abutted on the inner peripheral surface of the new pipe, or to attach the retaining ring to the inner wall of the new pipe. A fitting method is used. When the rear end face of the new pipe is pressed, a collar slightly larger than the outer diameter of the new pipe may be provided on the outer periphery of the rear of the new pipe holding means, and a conventional technique of fitting may be used.
【００１０】[0010]
【作用】本発明の既設埋設管の更新方法によれば、圧力
水と切削粗砂を高圧噴射することにより、既設埋設管の
壁面コンクリートを順次切削していく。切削された切削
粉は、水とともに吸引口から管内を通って連続排出され
ていく。また、コンクリート中の鉄筋も、特に高圧水と
ともに噴射される切削粗砂の噴射作用により効率良く切
削される。According to the method for renewing an existing buried pipe of the present invention, the wall concrete of the existing buried pipe is sequentially cut by injecting high pressure water and cutting coarse sand. The cut powder is continuously discharged together with water from the suction port through the pipe. Also, the reinforcing steel in concrete is efficiently cut by the jetting action of the cutting coarse sand jetted particularly with high-pressure water.
【００１１】[0011]
【実施例】以下、本発明の詳細について図面を基に具体
的に説明する。第１図は、本発明の水圧切削手段１の噴
射ノズル２部分を説明する縦断面図である。水圧切削手
段１のアーム６の先端には既設埋設管１２の壁面に対応
する位置に噴射ノズル２が装備されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a longitudinal sectional view for explaining the injection nozzle 2 portion of the hydraulic cutting means 1 of the present invention. At the tip of the arm 6 of the hydraulic cutting means 1, an injection nozzle 2 is provided at a position corresponding to the wall surface of the existing buried pipe 12.
【００１２】噴射ノズル２の構造としては、第２図に示
すように既設埋設管１２の壁面の厚さ分だけ高圧水を噴
射させる矩形断面の高圧水ノズル３が設けられ、その高
圧水ノズル３の外周部には、高圧水とともに噴射させて
切削効率を良くするための切削粗砂ノズル４が設けられ
ている。さらに切削粗砂ノズル４の外周部には、高圧水
ノズル３と切削粗砂ノズル４で切削された切削粉を水と
ともに吸い取り排出する吸引口５が設けられている。As shown in FIG. 2, a high-pressure water nozzle 3 having a rectangular cross section for injecting high-pressure water by the thickness of the wall surface of the existing buried pipe 12 is provided as a structure of the injection nozzle 2. Is provided with a cutting coarse sand nozzle 4 for spraying with high-pressure water to improve cutting efficiency. Further, a suction port 5 for sucking and discharging the cutting powder cut by the high-pressure water nozzle 3 and the cutting coarse sand nozzle 4 together with water is provided on an outer peripheral portion of the cutting coarse sand nozzle 4.
【００１３】本実施例においては、高圧水ノズル３や切
削粗砂ノズル４の形状を矩形断面で開示したが、高圧を
得やすくするために円形断面のノズルを複数個並列した
形状とするのとも可能である。In this embodiment, the shapes of the high-pressure water nozzle 3 and the cutting coarse sand nozzle 4 are disclosed in a rectangular cross section. However, in order to easily obtain a high pressure, a plurality of nozzles having a circular cross section may be arranged in parallel. It is possible.
【００１４】第３図は、水圧切削手段１の正面図であ
り、アーム６の先端には既設埋設管１２に対応する位置
に噴射ノズル２が４個装備されている。アーム６の中央
部には噴射ノズル２を回転させる駆動機７が装備されて
いる。駆動機７の回転範囲は、噴射ノズル２が４ヵ所な
らば左右１８０゜の回転で、既設埋設管１２の壁面を確
実に切削できる。また、６ヵ所ならば１２０°左右回転
させればよい。FIG. 3 is a front view of the hydraulic cutting means 1. Four injection nozzles 2 are provided at the end of the arm 6 at positions corresponding to the existing buried pipe 12. A driving device 7 for rotating the injection nozzle 2 is provided at the center of the arm 6. The rotation range of the drive unit 7 is 180 ° left and right if the injection nozzles 2 are at four locations, so that the wall surface of the existing buried pipe 12 can be reliably cut. In addition, in the case of six places, it may be rotated left and right by 120 °.
【００１５】第４図は、本実例の施工状況を示す縦断面
図である。水圧切削手段１の後方には、新管保持手段１
０が回転軸８に連結されている。回転軸８への連結は、
新管保持手段１０に回転力が伝達しないようにロータリ
ージョイント９等を介して連結されている。新設管１３
の保持方法としては、新管保持手段１０に設けた保持リ
ング１１を新設管１３の内壁面にボルト等によって固定
して新管保持手段１０によって牽引していく方法が用い
られる。この場合、新管保持手段１０の後端には水圧切
削手段１や新管保持手段１０に前進力を付与するための
ケーシング１４が必要となる。FIG. 4 is a longitudinal sectional view showing the construction of the present embodiment. Behind the hydraulic cutting means 1, a new pipe holding means 1
0 is connected to the rotating shaft 8. The connection to the rotating shaft 8
It is connected via a rotary joint 9 or the like so that the rotational force is not transmitted to the new tube holding means 10. New pipe 13
As a holding method, a method is used in which the holding ring 11 provided on the new pipe holding means 10 is fixed to the inner wall surface of the new pipe 13 with bolts or the like, and is pulled by the new pipe holding means 10. In this case, a casing 14 for applying a forward force to the hydraulic cutting means 1 and the new pipe holding means 10 is required at the rear end of the new pipe holding means 10.
【００１６】前記した新設管１３の牽引方法以外に、新
設管１３の後端面を直接押圧する方法の場合は、新管保
持手段１０の後方外周に新設管１３外径よりやや大きめ
のカラーを設けて嵌設する方法を用いてもよい。In the case of a method of directly pressing the rear end face of the new pipe 13 other than the above-described method of pulling the new pipe 13, a collar slightly larger than the outer diameter of the new pipe 13 is provided on the outer periphery behind the new pipe holding means 10. Alternatively, a method of fitting by fitting may be used.
【００１７】次に、上記方法による既設埋設管１０の更
新方法について説明する。立坑部の既設埋設管１２の壁
面に、水圧切削手段１を設置し、新管保持手段１０の後
方には新設管１３を取り付ける。上記準備が完了する
と、噴射ノズル２の運転が開始され、高圧水ノズル３か
らは圧力水が、切削粗砂ノズル４からは粗砂が噴射され
て、既設埋設管１２の壁面のコンクリートや鉄筋を切削
していく。切削された切削粉は、吸引口５から吸い取ら
れ、坑外へと排出されていく。噴射ノズル２の運転とと
もに、新設管２も所定の速度で前進され、既設埋設管１
２と変わって新設管１３が埋設されていく。Next, a method of updating the existing buried pipe 10 by the above method will be described. The hydraulic cutting means 1 is installed on the wall surface of the existing buried pipe 12 in the shaft, and the new pipe 13 is attached behind the new pipe holding means 10. When the above preparation is completed, the operation of the injection nozzle 2 is started, and pressurized water is injected from the high-pressure water nozzle 3 and coarse sand is injected from the cutting coarse sand nozzle 4 to remove concrete or reinforcing steel on the wall surface of the existing buried pipe 12. Cutting. The cut powder is sucked from the suction port 5 and discharged out of the pit. With the operation of the injection nozzle 2, the new pipe 2 is also advanced at a predetermined speed, and the existing buried pipe 1 is moved forward.
In place of 2, a new pipe 13 is buried.
【００１８】[0018]
【発明の効果】本発明の高圧水ノズルと切削粗砂ノズル
の水と粗砂の噴射作用により既設埋設管のコンクリート
と鉄筋が同時に効率良く切削することが可能となり、既
設埋設管撤去が容易に行え、新設管の更新も効率良く行
えるので非常に経済的である。According to the present invention, the concrete and reinforcing bars of the existing buried pipe can be efficiently cut at the same time by the spraying of water and coarse sand from the high-pressure water nozzle and the cutting coarse sand nozzle, and the existing buried pipe can be easily removed. It is very economical because it is possible to update the new pipe efficiently.
【００１９】[0019]
【第１図】本発明の水圧切削手段の噴射ノズルを説明す
る縦断面図である。FIG. 1 is a longitudinal sectional view for explaining an injection nozzle of a hydraulic cutting means of the present invention.
【第２図】本発明の噴射ノズルを詳細に説明するの断面
図である。FIG. 2 is a sectional view for explaining an injection nozzle of the present invention in detail.
【第３図】本発明の水圧切削手段を示す正面図である。FIG. 3 is a front view showing a hydraulic cutting means of the present invention.
【第４図】本発明の施工状況を示す縦断面図である。FIG. 4 is a longitudinal sectional view showing a construction state of the present invention.
１ 水圧切削手段 ２ 噴射ノズル ３ 高圧水ノズル ４ 切削粗砂ノズル ５ 吸引口 ６ アーム ７ 駆動機 ８ 回転軸 ９ ロータリージョイント １０ 新管保持手段 １１ 保持リング １２ 既設埋設管 １３ 新設管 １４ ケーシング DESCRIPTION OF SYMBOLS 1 Hydraulic cutting means 2 Injection nozzle 3 High pressure water nozzle 4 Cutting coarse sand nozzle 5 Suction port 6 Arm 7 Drive 8 Rotating shaft 9 Rotary joint 10 New pipe holding means 11 Holding ring 12 Existing buried pipe 13 New pipe 14 Casing
Claims (1)
法において、既設埋設管端面の円周方向に所定の間隔を
おいて既設埋設管壁面の厚さよりやや大きめの噴射ノズ
ルを装備した水圧切削手段と、この水圧切削手段の回転
軸に回転力を伝達する駆動機と、この水圧切削手段の後
方に該水圧切削手段の回転軸と連結して新設管を保持す
る新管保持手段とにより、既設埋設管端面の壁面を水圧
切削手段の噴射ノズルにより順次切削しながら、新設管
後端面または新管保持手段の後部に固定して新設管内に
順次連結したケーシングの後端を押圧して管路を更新す
ることを特徴とする既設埋設管の更新方法。In the method of renewing an existing buried pipe buried underground, an injection nozzle slightly larger than the thickness of the wall of the existing buried pipe is provided at a predetermined interval in a circumferential direction of an end face of the existing buried pipe. Hydraulic cutting means, a driving machine for transmitting a rotational force to a rotary shaft of the hydraulic cutting means, and a new pipe holding means for holding a new pipe connected to the rotary shaft of the hydraulic cutting means behind the hydraulic cutting means. Thereby, while sequentially cutting the wall surface of the end face of the existing buried pipe by the injection nozzle of the hydraulic cutting means, pressing the rear end of the casing fixed to the rear end face of the new pipe or the rear part of the new pipe holding means and sequentially connected to the inside of the new pipe. A method for updating an existing buried pipe, characterized by updating a pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6257695A JP2583205B2 (en) | 1994-09-13 | 1994-09-13 | Updating existing buried pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6257695A JP2583205B2 (en) | 1994-09-13 | 1994-09-13 | Updating existing buried pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0886385A JPH0886385A (en) | 1996-04-02 |
| JP2583205B2 true JP2583205B2 (en) | 1997-02-19 |
Family
ID=17309835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6257695A Expired - Fee Related JP2583205B2 (en) | 1994-09-13 | 1994-09-13 | Updating existing buried pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2583205B2 (en) |
-
1994
- 1994-09-13 JP JP6257695A patent/JP2583205B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0886385A (en) | 1996-04-02 |
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|---|---|---|---|
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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