JP2754172B2 - Long-distance propulsion method - Google Patents
Long-distance propulsion methodInfo
- Publication number
- JP2754172B2 JP2754172B2 JP3583895A JP3583895A JP2754172B2 JP 2754172 B2 JP2754172 B2 JP 2754172B2 JP 3583895 A JP3583895 A JP 3583895A JP 3583895 A JP3583895 A JP 3583895A JP 2754172 B2 JP2754172 B2 JP 2754172B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- temporary
- buried pipe
- buried
- propulsion
- 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
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、下水道や上水道管、ガ
スや電線管の鞘管等を地中に推進埋設する長距離推進工
法に係わり、詳しくは、推進埋設に必要な推進力を複数
の管材に分散させて長距離推進施工する工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long-distance propulsion method for burying sewers, water pipes, sheath pipes of gas and electric conduits in the ground, and more particularly, to a method in which a plurality of propulsion forces necessary for burial are installed. And a long-distance propulsion construction method.
【０００２】[0002]
【従来の技術】従来、推進工法において推進延長が長く
なると、埋設管を地中に埋設するための推進力は除々に
増大して埋設管の許容軸方向耐荷力より大きくなると元
押装置だけでは推進施工ができなくなってしまう。その
ため埋設管接続部の所定の位置に複数のジャッキを装備
した中押装置を設置して、元押装置の推進力を分散する
方法が採用されてきた。2. Description of the Related Art Conventionally, when the propulsion method is extended, the propulsion force for burying a buried pipe in the ground gradually increases and becomes larger than the allowable axial load capacity of the buried pipe. Propulsion construction cannot be performed. For this reason, a method of distributing the propulsive force of the main pushing device by installing a middle pushing device equipped with a plurality of jacks at a predetermined position of the buried pipe connection portion has been adopted.
【０００３】長距離推進施工を行う場合は、前記した中
押装置を複数ヶ所に設置してやれば、元押装置にかかる
推進力は小さなものとなる。例えば、１０００ｍの長距
離推進を想定した場合、埋設管の１００ｍ間隔又は５０
ｍ間隔おきに中押装置が必要とすると、１００ｍ間隔の
場合は９ヶ所に設置すればよく、５０ｍ間隔の場合には
１９ヶ所に設置すれば、推進力は埋設管の軸方向耐荷力
以下に分散できて、１０００ｍの長距離推進施工でも可
能となる。In the case of long-distance propulsion construction, if the above-mentioned middle pushing device is installed at a plurality of places, the propulsive force applied to the main pushing device becomes small. For example, assuming long-distance propulsion of 1000 m, 100 m intervals or 50 m
If an intermediate pressing device is required every m intervals, it should be installed at 9 locations in the case of 100 m intervals, and if it is installed in 19 locations in the case of 50 m intervals, the propulsion force will be less than the axial load bearing capacity of the buried pipe. It can be dispersed and can be used for long-distance propulsion construction of 1000 m.
【０００４】[0004]
【発明が解決しようとする課題】上記した従来技術によ
り長距離推進施工が可能となったが、下記による問題点
がある。推進延長が長くなると、従来技術で例示したよ
うに中押装置に設置する中押ジャッキの設置本数が数十
本〜百数十本と非常に多くなり設備費に莫大な費用を必
要とする。Although the above-mentioned prior art has made long-distance propulsion construction possible, it has the following problems. When the propulsion extension becomes long, the number of the middle push jacks to be installed in the middle push device as illustrated in the prior art becomes very large, several tens to one hundred and several tens, and an enormous cost is required for equipment costs.
【０００５】通常、中押装置に設置される中押ジャッキ
は、中押外筒の構造上余り外筒長を長くとれず、中押ジ
ャッキ長を短くするため、比較的短いストロークの中押
ジャッキを使用している。短いストロークの中押ジャッ
キでは、ジャッキ伸縮の繰り返しが非常に多い回数とな
り、後続する埋設管と中押外筒の間に装備した止水材等
が磨耗したり破損したりして止水性がなくなり、管内に
地下水や土砂の流入を起こしている。[0005] Usually, the middle push jack installed in the middle push device cannot have a relatively long outer cylinder length due to the structure of the middle push outer cylinder and shortens the middle push jack length. You are using In a short stroke middle push jack, the jack expansion and contraction is repeated very often, and the water stop material etc. installed between the subsequent buried pipe and the middle push outer cylinder is worn or damaged, and the water stoppage is lost , And groundwater and sediment flow into the pipe.
【０００６】また、前記したような中押ジャッキでは、
短いストロークであり、１管分を推進するために、前方
の中押装置より順次数回にわたってジャッキの伸縮操作
を行わなくてはならなく、推進作業が非常に繁雑となる
ことから推進速度の遅延や作業環境の悪化を招来してい
る。[0006] In the above-described middle push jack,
It is a short stroke, and the jack must be extended and retracted several times in order from the middle pusher in order to propel one pipe, and the propulsion work becomes very complicated. And worsening of the work environment.
【０００７】そして、推進完了後の中押ジャッキの取外
し作業も、ジャッキが埋設管端面に挟まれているため、
その都度、ジャッキを伸長、縮小して取外さなければな
らなく、長距離推進時においてはジャッキの操作や取外
し作業に多くの時間を費やしている。[0007] The work of removing the center push jack after the completion of propulsion is also difficult because the jack is sandwiched between the buried pipe end faces.
Each time, the jack must be extended and contracted and removed, and during long-distance propulsion, much time is spent on jack operation and removal work.
【０００８】[0008]
【課題を解決するための手段】本発明の先導体で掘削孔
を形成しながら前記掘削孔に沿って埋設管を埋設する長
距離推進工法において、先導体の後方に、先導体外径と
略同じ外径を有する仮管を順次連結していくとともに、
該仮管の内側にも埋設管を順次連結して挿入し、仮管の
後端に装備した元押装置で、仮管に推進力を加えること
により仮管を推進させていく工程と、前記仮管を所定の
延長まで推進埋設した後、仮管内に挿入した埋設管の後
端に装備した元押装置で、埋設管に推進力を加えること
により埋設管のみを推進させていく工程と、埋設管の推
進とともに埋設管外周部に滑材を注入して充填していく
工程とにより、埋設管を長延長にわたって埋設すること
を特徴としている。According to the long-distance propulsion method of the present invention for burying a buried pipe along a borehole while forming the borehole with the leading conductor according to the present invention, the outer diameter of the leading conductor is substantially the same as the outer diameter of the leading conductor. While sequentially connecting temporary tubes with outer diameters,
A step of sequentially connecting and inserting the buried pipe also inside the temporary pipe, and propelling the temporary pipe by applying a propulsive force to the temporary pipe with a main pushing device equipped at the rear end of the temporary pipe; After propulsion and embedding the temporary pipe to a predetermined extension, a step of propelling only the buried pipe by applying a propulsive force to the buried pipe with a main pushing device equipped at the rear end of the buried pipe inserted into the temporary pipe, It is characterized in that the buried pipe is buried over a long extension by the step of injecting and filling the outer peripheral portion of the buried pipe together with the promotion of the buried pipe.
【０００９】仮管は、比較的強度のある鋼材等で製作さ
れ、仮管の内径としては、埋設管の下方で埋設管を支持
する支持台が取り付けられる大きさが必要である。支持
台の大きさは、仮管内径に影響するため、できるだけ小
型で、埋設管を支持できる堅固なものが好ましい。なぜ
ならば、仮管の大きさによって先導体外径が決まるた
め、埋設管との径に大きな差ができると、埋設管と先導
体との空隙が大きくなり、滑材の注入量が増し不経済と
なるためである。The temporary pipe is made of a relatively strong steel material or the like, and the inner diameter of the temporary pipe needs to be large enough to mount a support for supporting the buried pipe below the buried pipe. Since the size of the support pedestal affects the inner diameter of the temporary pipe, it is preferable that the size be as small as possible and that it is rigid enough to support the buried pipe. Because the outer diameter of the pre-conductor is determined by the size of the temporary pipe, if there is a large difference in diameter from the buried pipe, the gap between the buried pipe and the pre-conductor becomes large, and the amount of lubricant injected increases, which is uneconomical. It is because it becomes.
【００１０】滑材の材料としては、一般に使用されてい
る液状滑材や固形滑材等を使用することができる。As the material of the lubricant, generally used liquid lubricant, solid lubricant and the like can be used.
【００１１】仮管の先端には、埋設管推進時に仮管内に
土砂や地下水が流入しないように、リング状の止水材が
装置されている。止水材の材料としては、一般に使用さ
れているゴム等を使用すればよい。At the end of the temporary pipe, a ring-shaped water-stopping material is provided so that earth and sand and groundwater do not flow into the temporary pipe when the buried pipe is propelled. As the material of the water stopping material, rubber or the like generally used may be used.
【００１２】[0012]
【作用】上記した発明によれば、鋼材等強度の高い仮管
の許容軸方向耐荷力内までの長距離推進をした後、仮管
に設置した埋設管に推進力を加えて埋設管のみを推進埋
設する。埋設管外周には、先導体後端より注入された均
一な滑材層が確実に充填された状態となっているので、
非常に低い推進力ですみ、従来の推進延長と比べて、非
常に長い推進施工が可能となる。According to the above-mentioned invention, after propulsion for a long distance to within the allowable axial load capacity of a temporary pipe having high strength such as steel material, a propulsive force is applied to the buried pipe installed in the temporary pipe to remove only the buried pipe. Buried for promotion. Since the uniform lubricating layer injected from the rear end of the leading conductor is reliably filled around the buried pipe,
With very low propulsion, very long propulsion works are possible compared to conventional prolonged propulsion.
【００１３】[0013]
【実施例】本発明を一実施例をもとに説明する。第１図
は、本発明の長距離推進工法を説明する縦断面図であ
る。仮管１の先端には、掘削機能を持った先導体２を取
り付けている。先導体２の後部には、複数の滑材注入孔
３を装備しておく。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on one embodiment. FIG. 1 is a longitudinal sectional view for explaining the long-distance propulsion method of the present invention. At the tip of the temporary pipe 1, a tip conductor 2 having a drilling function is attached. A plurality of lubricant injection holes 3 are provided at the rear of the leading conductor 2.
【００１４】仮管１の内部には、仮管１接続時と同時に
埋設管４も接続し設置する。The buried pipe 4 is connected and installed inside the temporary pipe 1 at the same time as the temporary pipe 1 is connected.
【００１５】仮管１の先端部には、埋設管４と仮管１と
の空隙に滑材や埋設管４推進時の土砂や地下水が流入し
ないように止水材５を固定しておく。At the front end of the temporary pipe 1, a waterproof material 5 is fixed so as to prevent a slipping material, earth and sand or groundwater when the embedded pipe 4 is propelled from flowing into a gap between the embedded pipe 4 and the temporary pipe 1.
【００１６】仮管１と埋設管４の最後端には、元押ジャ
ッキ６の推進力を均等に分散させる押輪７を設置し推進
する。At the last ends of the temporary pipe 1 and the buried pipe 4, a push wheel 7 for uniformly dispersing the propulsive force of the original push jack 6 is installed and propelled.
【００１７】第２図は、仮管１内に埋設管を設置した時
の横断面図である。仮管１の中心軸に埋設管４を敷設す
るために仮管１内側に複数の支持台９を設けて埋設管４
の支持をする。FIG. 2 is a cross-sectional view when a buried pipe is installed in the temporary pipe 1. In order to lay the buried pipe 4 on the central axis of the temporary pipe 1, a plurality of supports 9 are provided inside the temporary pipe 1 and
To support.
【００１８】第３図は、仮管１の許容軸方向耐荷力内ま
で推進施工を行った後、埋設管４を推進させた時の縦断
面図である。仮管１を許容軸方向耐荷力まで推進施工し
た後、埋設管４の推進開始と同時に、先導体２と埋設管
４の空隙を充填し、埋設管４の推進を低推力で円滑に推
進させるために先導体２の後端に複数の滑材注入孔３が
装備されて滑材１０を注入する。FIG. 3 is a longitudinal sectional view when the buried pipe 4 is propelled after the propulsion work is performed to within the allowable axial load carrying capacity of the temporary pipe 1. After the temporary pipe 1 is propelled to the allowable axial load capacity, the space between the leading conductor 2 and the buried pipe 4 is filled at the same time as the propulsion of the buried pipe 4 is started, and the propulsion of the buried pipe 4 is smoothly propelled with a low thrust. For this purpose, a plurality of lubricant injection holes 3 are provided at the rear end of the leading conductor 2 to inject the lubricant 10.
【００１９】次に本発明の工法を用いた施工方法につい
て説明する。発進立坑８からまず掘削機能を持った先導
体２を設置し、推進させる。先導体２の推進が完了する
と、その後続部には仮管１の内部に支持台９で埋設管４
を支持した仮管１を接続し、元押ジャッキ６で仮管１の
後端を押し、推進させる。仮管１を許容軸方向耐荷力内
まで推進した時点で、仮管１の推進施工を完了し、元押
ジャッキ６を埋設管４に移行させて、埋設管４だけを順
次到達立坑まで推進させる。Next, a construction method using the construction method of the present invention will be described. First, the tip conductor 2 having the excavation function is installed and propelled from the starting shaft 8. When the propulsion of the leading conductor 2 is completed, the buried pipe 4 is mounted on the subsequent portion of the temporary pipe 1 by the support 9.
Is connected, and the rear end of the temporary pipe 1 is pushed by the original pushing jack 6 to be propelled. When the temporary pipe 1 is propelled to within the allowable axial load capacity, the propulsion construction of the temporary pipe 1 is completed, the original push jack 6 is transferred to the buried pipe 4, and only the buried pipe 4 is sequentially propelled to the arrival shaft. .
【００２０】埋設管４を許容軸方向耐荷力内で円滑に推
進させるためには、前記したように先導体２に装備した
滑材注入孔３より滑材１０を地中に注入しながら推進す
る。また、埋設管４の推進時に、仮管１内径と埋設管４
外径との空隙に土砂や地下水及び滑材１０等が流入しな
いように仮管１の最先端面に止水材５を取り付けてお
き、防止する。In order to smoothly propel the buried pipe 4 within the allowable axial load capacity, the lubricating material 10 is propelled while being injected into the ground through the lubricating material injection hole 3 provided in the leading conductor 2 as described above. . When the buried pipe 4 is propelled, the inner diameter of the temporary pipe 1 and the
A waterproof material 5 is attached to the foremost surface of the temporary pipe 1 so as to prevent earth and sand, groundwater, the lubricating material 10 and the like from flowing into the gap between the outer diameter and the outer diameter, and prevent the material.
【００２１】到達立坑まで埋設管４の推進施工が完了し
たら、埋設管４外径と仮管１内径との空隙にはコンクリ
ート等を注入して充填し埋設管４を固定する。When the propulsion of the buried pipe 4 is completed up to the reaching shaft, concrete or the like is injected into the gap between the outer diameter of the buried pipe 4 and the inner diameter of the temporary pipe 1 and the buried pipe 4 is fixed.
【００２２】さらに長距離の推進施工や大きな推進力が
想定される場合には、仮管１にかかる推進力を分散させ
るために複数段の仮管を設置する方法を用いることも可
能である。Further, when long-distance propulsion construction or large propulsion is expected, a method of disposing a plurality of stages of temporary pipes to disperse the propulsion applied to the temporary pipe 1 can be used.
【００２３】[0023]
【発明の効果】以上に述べた、この発明にかかる長距離
推進工法によれば、鋼材等強度の高い仮管を許容軸方向
耐荷力内まで長距離推進をした後、仮管に設置した埋設
管を、外周が均等に滑材で充填した中を推進埋設できる
ので、非常に低い推進力で長距離推進ができ、仮管推進
と埋設管推進延長を合わせると、中押装置のいらない非
常に長い推進埋設が可能となった。また、中押装置を使
用しなくてすみ、中押装置に設置する多数の中押ジャッ
キが必要でなくなるため、設備費が大幅に減少され、ま
た、推進完了後の中押ジャッキの取外し作業等も除かれ
るので、施工日数も著しく減らすことができる。According to the long-distance propulsion method according to the present invention described above, a temporary pipe having high strength such as steel is propelled for a long distance to within the allowable axial load capacity, and then buried in the temporary pipe. Since the pipe can be buried while the outer circumference is evenly filled with lubrication material, long distance propulsion can be performed with very low propulsion. Long propulsion burial became possible. In addition, the need for using the central pusher is eliminated, and the need for a large number of central pusher jacks to be installed in the central pusher is eliminated, thus significantly reducing equipment costs and removing the central pusher jack after completion of propulsion. Is also eliminated, so that the number of construction days can be significantly reduced.
【第１図】本発明の長距離推進工法を説明する縦断面図
である。FIG. 1 is a longitudinal sectional view illustrating a long-distance propulsion method of the present invention.
【第２図】仮管内に埋設管を設置した時の横断面図であ
る。FIG. 2 is a cross-sectional view when a buried pipe is installed in a temporary pipe.
【第３図】仮管の許容軸方向有耐荷力内まで推進施工を
行った後、埋設管を推進させた時の縦断面図である。FIG. 3 is a longitudinal sectional view when a buried pipe is propelled after the propulsion work is performed to within a load bearing capacity in an allowable axial direction of a temporary pipe.
１ 仮管 ２ 先導体 ３ 滑材注入孔 ４ 埋設管 ５ 止水材 ６ 元押ジャッキ ７ 押輪 ８ 発進立坑 ９ 支持台 １０ 滑材 DESCRIPTION OF SYMBOLS 1 Temporary pipe 2 Lead conductor 3 Lubricant injection hole 4 Buried pipe 5 Water stoppage material 6 Main push jack 7 Press ring 8 Starting shaft 9 Support stand 10 Lubricant
Claims (1)
に沿って埋設管を埋設する長距離推進工法において、先
導体の後方に、先導体外径と略同じ外径を有する仮管を
順次連結していくとともに、該仮管の内側にも埋設管を
順次連結して挿入し、仮管の後端に装備した元押装置
で、仮管に推進力を加えることにより仮管を推進させて
いく工程と、前記仮管を所定の延長まで推進埋設した
後、仮管内に挿入した埋設管の後端に装備した元押装置
で、埋設管に推進力を加えることにより埋設管のみを推
進させていく工程と、埋設管の推進とともに埋設管外周
部に滑材を注入して充填していく工程とにより、埋設管
を長延長にわたって埋設することを特徴とする長距離推
進工法。In a long-distance propulsion method for burying a buried pipe along a borehole while forming a borehole with a leading conductor, a temporary pipe having an outer diameter substantially equal to the outer diameter of the leading conductor is provided behind the leading conductor. The temporary pipe is propelled by sequentially connecting and inserting the buried pipe inside the temporary pipe, and applying a propulsive force to the temporary pipe with the main pushing device installed at the rear end of the temporary pipe. After the step of propelling and embedding the temporary pipe to a predetermined extension, only the buried pipe is applied by applying a propulsive force to the buried pipe with a main pushing device provided at the rear end of the buried pipe inserted into the temporary pipe. A long-distance propulsion method characterized in that the buried pipe is buried over a long extension by the step of propelling and the step of injecting and filling the outer peripheral portion of the buried pipe with the propulsion of the buried pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3583895A JP2754172B2 (en) | 1995-01-12 | 1995-01-12 | Long-distance propulsion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3583895A JP2754172B2 (en) | 1995-01-12 | 1995-01-12 | Long-distance propulsion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08189293A JPH08189293A (en) | 1996-07-23 |
| JP2754172B2 true JP2754172B2 (en) | 1998-05-20 |
Family
ID=12453125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3583895A Expired - Lifetime JP2754172B2 (en) | 1995-01-12 | 1995-01-12 | Long-distance propulsion method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2754172B2 (en) |
-
1995
- 1995-01-12 JP JP3583895A patent/JP2754172B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08189293A (en) | 1996-07-23 |
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