JP2791398B2 - Curved propulsion method and equipment and buried pipe for curved propulsion - Google Patents
Curved propulsion method and equipment and buried pipe for curved propulsionInfo
- Publication number
- JP2791398B2 JP2791398B2 JP6183604A JP18360494A JP2791398B2 JP 2791398 B2 JP2791398 B2 JP 2791398B2 JP 6183604 A JP6183604 A JP 6183604A JP 18360494 A JP18360494 A JP 18360494A JP 2791398 B2 JP2791398 B2 JP 2791398B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- propulsion
- buried
- curved
- pipes
- 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】この発明は、曲線推進工法および
装置に関し、詳しくは、下水管などの地下埋設管を埋設
施工する際に、地盤を開削することなく、地盤に直接埋
設孔を形成し、形成された埋設孔に埋設管を埋設してい
く、いわゆる推進工法において、特に、曲線部分を施工
する方法、すなわち曲線推進工法と、この曲線推進工法
の実施に用いる装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curve propulsion method and apparatus, and more particularly, to a method for forming a buried hole directly in the ground without digging the ground when burying an underground pipe such as a sewer pipe. The present invention relates to a so-called propulsion method in which a buried pipe is buried in a formed burial hole, particularly to a method for constructing a curved portion, that is, a curve propulsion method and an apparatus used for implementing the curve propulsion method.
【0002】[0002]
【従来の技術】推進工法は、埋設経路に沿って地盤を広
く開削する必要がないため、交通量が多く通行制限が行
い難い施工現場等に適した方法として、研究開発が進め
られている。そして、下水管等の埋設施工においては、
様々な路上の制限により立坑の築造が困難な場合があ
る。また、公道下に埋設するという前提条件から道路形
状に沿って埋設管を曲線状に埋設しなければならない場
合がある。このような場合には、曲線部分への推進工法
の適用が必要となる。2. Description of the Related Art The propulsion method has been researched and developed as a method suitable for a construction site or the like where the traffic volume is large and the traffic is difficult to restrict because it is not necessary to cut the ground widely along the buried route. And, in burial construction such as sewer pipes,
Construction of shafts can be difficult due to various road restrictions. In addition, there is a case where it is necessary to bury a buried pipe in a curved shape along a road shape due to a precondition that the buried pipe is buried under a public road. In such a case, it is necessary to apply the propulsion method to the curved portion.
【0003】従来、曲線部に推進工法を適用するには、
まず、アースオーガや圧密ヘッドを備えた先導体の周方
向に複数本の方向制御ジャッキを備えておき、この方向
制御ジャッキを伸縮させることによって、先導体を変向
させて所定の曲線方向を向かせる。この状態で、埋設管
列の最後尾に元押しジャッキ等で推進力を加えれば、先
導体は前記曲線方向へと推進されて、曲線状の埋設孔が
形成され、埋設管も、この曲線状の埋設孔に沿って送り
込まれるようになっている。Conventionally, to apply a propulsion method to a curved part,
First, a plurality of directional control jacks are provided in the circumferential direction of a leading conductor having an earth auger and a consolidation head, and by extending and contracting the directional controlling jack, the leading conductor is deflected to a predetermined curved direction. Let it go. In this state, if a propulsion force is applied to the end of the row of buried pipes by a main push jack or the like, the leading conductor is propelled in the curved direction, and a curved buried hole is formed. Are sent along the buried hole.
【0004】また、前記方向制御ジャッキと同様のジャ
ッキを、先導体の後方に接続される埋設管同士の連結部
分にも設けておき、このジャッキで前後の埋設管を押動
して所定曲線に沿う角度に屈曲させた状態で推進する方
法も提案されている。上記ジャッキは、補助ジャッキあ
るいは中押しジャッキとも呼ばれている。このようなジ
ャッキの作動機構としては、油圧シリンダや空圧シリン
ダなど、圧力流体を供給して流体圧でピストンを伸縮さ
せる、いわゆる伸縮シリンダが採用されることが多い。
伸縮シリンダは、作動が迅速かつスムーズで伸縮量の正
確な制御が可能であり、遠隔操作や自動化にも適してい
るという利点がある。A jack similar to the directional control jack is also provided at a connection portion between buried pipes connected to the rear of the leading conductor, and the jacks push the front and rear buried pipes to form a predetermined curve. A method of propulsion in a state of being bent at an angle along the same has also been proposed. The jack is also called an auxiliary jack or a middle jack. A so-called telescopic cylinder that supplies a pressurized fluid and expands and contracts a piston by fluid pressure, such as a hydraulic cylinder or a pneumatic cylinder, is often used as an operating mechanism of such a jack.
The telescopic cylinder has an advantage that the operation is quick and smooth, the precise control of the telescopic amount is possible, and the telescopic cylinder is suitable for remote control and automation.
【0005】[0005]
【発明が解決しようとする課題】ところが、上記のよう
な従来における曲線推進工法は、曲率半径の小さな、す
なわち曲がりの鋭い曲線部分の推進施工には適用し難い
という問題があった。これは、以下の理由によるものと
考えられる。先導体と後続の埋設管あるいは埋設管同士
の間に装着された曲線形成用のジャッキとして、前記し
た伸縮シリンダを採用した場合、先導体および埋設管を
曲線に沿って屈曲させた状態では、管断面の周方向に配
置された複数の伸縮シリンダのうち、曲線の外側になる
伸縮シリンダは大きく伸ばされ、曲線の内側になる伸縮
シリンダは縮められた状態になる。この状態で、先導体
および埋設管を曲線に沿って推進させていくとき、地盤
などから伸縮シリンダに加わる反力は、ピストンの軸方
向に加わる成分と、軸と直交する方向に加わる成分とに
分けられる。伸縮シリンダは、ピストンの軸方向の力に
は比較的耐えることができるが、ピストンの軸と直交す
る方向の力には弱く、特に衝撃的な力には弱いという欠
点があり、このような軸と直交する方向の力によって、
ピストンが変形したり、ピストンとシリンダの摺動面に
故障が生じたりすることになる。地盤の土質状況によっ
て、衝撃的に反力が増大することはしばしば起こり得
る。曲線の曲率半径が小さく、すなわち曲線の曲がりが
鋭くなれば、それだけピストンの軸と直交する方向の力
成分が増えるので、上記のような問題が余計に起こり易
くなる。However, the conventional curve propulsion method as described above has a problem that it is difficult to apply it to the propulsion construction of a curved portion having a small radius of curvature, that is, a sharp curve. This is considered to be due to the following reasons. When the above-described telescopic cylinder is employed as a jack for forming a curve mounted between the leading conductor and the subsequent buried pipe or between the buried pipes, the pipe is bent when the leading conductor and the buried pipe are bent along the curve. Among the plurality of telescopic cylinders arranged in the circumferential direction of the cross section, the telescopic cylinder outside the curve is greatly extended, and the telescopic cylinder inside the curve is contracted. In this state, when propelling the leading conductor and the buried pipe along the curve, the reaction force applied to the telescopic cylinder from the ground etc. is divided into a component applied in the axial direction of the piston and a component applied in the direction orthogonal to the axis. Divided. The telescopic cylinder can relatively endure the axial force of the piston, but has the disadvantage that it is weak to the force in the direction perpendicular to the axis of the piston, especially to shocking force. By the force in the direction orthogonal to
The piston may be deformed, or a failure may occur on the sliding surface between the piston and the cylinder. Due to the soil condition of the ground, it is often possible to increase the reaction force in a shocking manner. The smaller the radius of curvature of the curve, that is, the sharper the curve, the more the force component in the direction perpendicular to the axis of the piston increases, so that the above-described problem is more likely to occur.
【0006】また、地盤の地質の変化などで、伸縮シリ
ンダに加わる反力の大きさが変わると、ピストンが弾力
的に伸縮して、先導体と後続管体あるいは後続管体同士
の屈曲角度が変わってしまうという問題がある。伸縮シ
リンダのピストンは、流体圧と反力とが釣り合った状態
で所定位置に維持されているので、反力の大きさが変動
すると、流体の弾性変形などの作用で、ピストンの伸縮
位置も変わってしまうのである。ピストンの伸縮位置が
変われば、その位置における前後の管体の間隔も変わ
り、管体の屈曲角度が変動してしまう。そのため、所望
の曲線形状からずれた形で先導体や後続管体が推進され
てしまうことになる。このような反力の変動による曲線
のずれも、曲線の曲がりが鋭いほど、顕著に表れること
になる。Further, when the magnitude of the reaction force applied to the telescopic cylinder changes due to a change in the geology of the ground or the like, the piston elastically expands and contracts, and the bending angle between the leading conductor and the succeeding pipe or between the following pipes increases. There is a problem that changes. Since the piston of the telescopic cylinder is maintained at a predetermined position with the fluid pressure and the reaction force balanced, if the magnitude of the reaction force fluctuates, the elastic position of the piston changes due to the elastic deformation of the fluid. It will be. If the expansion / contraction position of the piston changes, the interval between the front and rear tubes at that position also changes, and the bending angle of the tube changes. Therefore, the leading conductor and the following tubular body are propelled in a form deviating from a desired curved shape. Such a shift in the curve due to the change in the reaction force also becomes more noticeable as the curve is sharper.
【0007】さらに、伸縮シリンダでは、流体圧の供給
源や途中の配管などの特性によって、流体圧が変動する
可能性もある。このような伸縮シリンダ側の原因によっ
て、ピストンの位置が変動する問題もある。反力が変動
しても、ピストンの位置が変わらないように、ピストン
の位置を精密に監視しておき、それに合わせて、供給す
る流体圧や流体量を精密に調整制御すれば、上記のよう
な問題はある程度解消できるが、そのためには複雑な制
御装置が必要であり、操作も難しくなる。Furthermore, in the telescopic cylinder, the fluid pressure may fluctuate depending on the characteristics of the fluid pressure supply source and the piping in the middle. There is also a problem that the position of the piston fluctuates due to the cause on the telescopic cylinder side. Even if the reaction force fluctuates, the position of the piston is precisely monitored so that the position of the piston does not change, and the fluid pressure and the amount of fluid to be supplied are precisely adjusted and controlled in accordance with it, as described above. Can be solved to some extent, but for that, a complicated control device is required and the operation becomes difficult.
【0008】上記した流体圧で駆動される伸縮シリンダ
以外にも、電磁力などで駆動されるピストンその他のジ
ャッキ機構も使用されるが、程度の違いはあっても同様
の問題を含んでいる。そこで、この発明の課題は、前記
のような曲線推進工法において、従来技術の問題点を解
消し、先導体や後続管体を曲線状に屈曲させる機構の耐
久性を高め、反力の変動による曲線形状のずれを防ぐこ
とができ、曲率の大きな曲線部分の推進施工にも良好に
適用することのできる方法を提供することにある。ま
た、このような方法に使用する曲線推進装置を提供する
ことにある。さらに、曲率の大きな曲線部分にもスムー
ズに推進埋設していくことのできる曲線推進用埋設管を
提供することにある。In addition to the above-described telescopic cylinder driven by fluid pressure, a piston or other jack mechanism driven by electromagnetic force or the like is also used, but it has the same problem, albeit to a different degree. Therefore, an object of the present invention is to solve the problems of the prior art in the curve propulsion method as described above, to increase the durability of a mechanism for bending a leading conductor or a subsequent tube in a curved shape, and to reduce the reaction force. It is an object of the present invention to provide a method which can prevent a deviation of a curved shape and can be favorably applied to propulsion construction of a curved portion having a large curvature. Another object of the present invention is to provide a curve propulsion device used in such a method. Another object of the present invention is to provide a buried pipe for curved propulsion that can be smoothly buried even in a curved portion having a large curvature.
【0009】[0009]
【課題を解決するための手段】上記課題を解決する、こ
の発明にかかる曲線推進工法は、先導体で曲線状の埋設
孔を形成し、埋設管を前記曲線状の埋設孔に沿って埋設
する曲線推進工法において、先導体および先導体の後方
に連結される後続管体からなる複数の管体を、互いの対
向面で円周方向の複数個所に伸縮押動ジャッキを介し
て、屈曲自在に連結しておくとともに、前記伸縮押動ジ
ャッキに隣接して、伸縮押動ジャッキが任意の伸縮状態
で、前後の管体の間隔を機械的に固定する機械的固定手
段を設けておき、推進個所の所望曲率にしたがって、前
記伸縮押動ジャッキで前後の管体を所定角度に屈曲さ
せ、ついで機械的固定手段で屈曲状態を固定した後、先
導体を含む複数の管体に推進力を加えて、曲線状に推進
させる。According to the curved propulsion method of the present invention, which solves the above-mentioned problems, a curved buried hole is formed by a leading conductor, and a buried pipe is buried along the curved buried hole. In the curve propulsion method, a plurality of pipes consisting of a leading conductor and a succeeding tubular body connected to the back of the leading conductor are flexibly bent at a plurality of locations in the circumferential direction on opposite surfaces of each other via a telescopic pushing jack. In addition to being connected, mechanical fixing means for mechanically fixing the interval between the front and rear pipes is provided adjacent to the telescopic push jack in any telescopic state of the telescopic push jack. According to the desired curvature of, the front and rear pipes are bent at a predetermined angle by the telescopic pushing jack, and then the bent state is fixed by mechanical fixing means, and then a propulsive force is applied to the plurality of pipes including the leading conductor. Propelled in a curved shape.
【0010】先導体は、基本的な構造としては、通常の
推進工法で使用されているものと同じものが用いられ
る。先導体の外径は、敷設する埋設管の外径に合わせて
設定される。先導体には、アースオーガ等の掘削手段
や、地盤に対する圧密ヘッド等を備えていて、先導体の
推進とともに埋設孔を形成していく。また、先導体から
地盤面に泥水を循環供給し、掘削された土砂を泥水とと
もに排出する機構などを備えたものもある。The basic structure of the leading conductor is the same as that used in the ordinary propulsion method. The outer diameter of the leading conductor is set according to the outer diameter of the buried pipe to be laid. The leading conductor is provided with a digging means such as an earth auger, a head for compacting the ground, and the like, and a buried hole is formed as the leading conductor is propelled. Further, there is also provided a mechanism that circulates and supplies muddy water from the leading conductor to the ground surface and discharges excavated earth and sand together with the muddy water.
【0011】後続管体とは、最終的に埋設施工する埋設
管の場合と、埋設管とは別に用意された管体であって、
先導体とともに推進されて埋設孔に敷設された後、埋設
管で置き換えられる仮管の場合と、先導体の後方に連結
されて埋設孔を形成する管体であって、この管体の後方
に埋設管または仮管を連結して推進させる、先導体と一
体となった補助管体の場合などがある。この補助管体を
用いる場合には、先導体と複数の補助管体とで先導体装
置を構成することになる。埋設管や仮管の材料や構造
は、従来の通常の推進工法の場合と同様でよい。埋設管
には、ヒューム管やFRP管、鋼管、合成樹脂管などが
用いられる。仮管には、繰り返し使用が可能な鋼管など
が用いられる。補助管体には、先導体の外殻構造と同様
の鋼管などが使用される。[0011] The succeeding pipe is a pipe which is finally buried and buried, and a pipe which is prepared separately from the buried pipe.
A temporary pipe replaced with a buried pipe after being propelled with the tip conductor and laid in the burial hole, and a pipe body connected behind the tip conductor to form a burial hole, There is a case where an auxiliary pipe is integrated with a leading conductor for connecting and propelling a buried pipe or a temporary pipe. When this auxiliary tube is used, a leading conductor device is constituted by a leading conductor and a plurality of subsidiary tubes. The material and structure of the buried pipe and the temporary pipe may be the same as those of the conventional ordinary propulsion method. As the buried pipe, a fume pipe, an FRP pipe, a steel pipe, a synthetic resin pipe, or the like is used. As the temporary pipe, a steel pipe or the like that can be used repeatedly is used. For the auxiliary pipe, a steel pipe or the like similar to the outer shell structure of the leading conductor is used.
【0012】伸縮押動ジャッキは、その両端の間隔が伸
縮して、両端に当接する物体を押動できるようになって
いれば、通常の推進工法その他の土木装置に採用されて
いるジャッキ機構を適用することができる。伸縮押動ジ
ャッキには、モータの回転力を直線方向の運動に変換し
て利用するもの、電磁力を直線方向に直接作用させるも
の、流体圧を利用するものなどがあるが、この発明で
は、流体圧で駆動する伸縮シリンダが好ましい。伸縮シ
リンダは、従来、前記した先導体の変向ジャッキや補助
ジャッキ、中押しジャッキなどに使用されていたのと同
様の、油圧、空圧、水圧などの流体圧で駆動されるシリ
ンダ装置が用いられる。シリンダ装置の具体的構造とし
ては、シリンダ本体とこのシリンダ本体に出入り自在な
ピストンとを備えたものが採用できる。[0012] The telescopic push jack has a jack mechanism employed in a normal propulsion method and other civil engineering equipment, as long as the distance between both ends thereof can be expanded and contracted so that an object abutting on both ends can be pushed. Can be applied. There are telescopic push jacks that use the motor by converting the rotational force of the motor into linear motion, those that directly apply electromagnetic force in the linear direction, and those that use fluid pressure. A telescopic cylinder driven by fluid pressure is preferred. As the telescopic cylinder, a cylinder device driven by fluid pressure such as hydraulic pressure, pneumatic pressure, water pressure, and the like is used, which is the same as that used in conventional deflection jacks, auxiliary jacks, and middle push jacks of the leading conductor. . As a specific structure of the cylinder device, a cylinder device having a cylinder body and a piston that can freely enter and exit the cylinder body can be adopted.
【0013】伸縮押動ジャッキは、先導体と後続管体、
あるいは、後続管体同士の対向面で、円周方向の複数個
所に設けられる。具体的には、少なくとも直径方向の2
個所に設けておけばよいが、3個所、4個所あるいは6
個所など、必要な押動力あるいは曲線の屈曲方向などの
条件に合わせて、必要な数を設けておけばよい。伸縮押
動ジャッキは、その前方または後方の何れか一方あるい
は両方の取付個所を、回動可能に取り付けておく。その
結果、円周方向の複数個所に設けられた伸縮押動ジャッ
キの伸縮量に差を付けることで、前後の先導体または後
続管体を、互いに屈曲させることができる。したがっ
て、円周方向に配置された複数個の伸縮押動ジャッキ
は、流体の供給や排出などの作動を統一的に制御して、
所望の曲線形状に沿った屈曲動作が効率的に行えるよう
にしておくのが好ましい。The telescopic push jack comprises a leading conductor and a trailing tube,
Alternatively, it is provided at a plurality of locations in the circumferential direction on the opposing surfaces of the subsequent tubes. Specifically, at least 2 in the diametric direction
It may be provided in three places, three places, four places or six places.
The required number may be provided in accordance with the conditions such as the required pushing force or the bending direction of the curve, such as the location. The telescopic pushing jack has one or both of the front and rear mounting portions rotatably mounted. As a result, by making a difference in the amount of expansion and contraction of the expansion / contraction push jacks provided at a plurality of positions in the circumferential direction, the front and rear leading conductors or the following tubular bodies can be bent mutually. Therefore, a plurality of telescopic pushing jacks arranged in the circumferential direction uniformly control the operation such as supply and discharge of fluid,
It is preferable that a bending operation along a desired curved shape can be efficiently performed.
【0014】伸縮押動ジャッキの取付位置は、推進施工
する先導体および後続管体からなる管列の中で、任意の
位置に設けておくことができる。一般的には、先導体と
それにつづく数個の後続管体の間に伸縮押動ジャッキを
取り付けておけば、所望の曲線状の埋設孔が形成できる
ので、それよりも後方の管体同士の間には伸縮押動ジャ
ッキがなくても、曲線状の埋設孔に沿って推進させるこ
とができる。The telescopic push jack can be installed at any position in the tube row composed of the leading conductor and the succeeding tube to be propelled. In general, if a telescopic pushing jack is attached between the leading conductor and several succeeding tubes, a desired curved buried hole can be formed. Even if there is no telescopic pushing jack between them, it can be propelled along the curved buried hole.
【0015】伸縮押動ジャッキを、先導体とともに先導
体装置を構成する補助管体に設けておく場合には、管体
に対して固定的に取り付けておいてもよいが、伸縮押動
ジャッキを、埋設管や仮管に設けておく場合には、埋設
施工後に伸縮押動ジャッキを撤去できるようにしておく
のが好ましい。機械的固定手段は、前記伸縮押動ジャッ
キに隣接して、前後の管体にかけて設けられる。機械的
固定手段の構造としては、伸縮押動ジャッキを任意の伸
縮長さに調整した状態で、伸縮押動ジャッキによって設
定された前後の管体同士の間隔を機械的に固定すること
ができれば、各種の機械装置などで利用されているよう
な固定手段が使用できる。具体的には、ボルトナットに
よる固定手段、キーや嵌合凹凸部による嵌合固定手段な
どが適用できる。伸縮押動ジャッキが、その伸縮長さを
連続的を変化させる場合には、機械的固定手段の固定位
置も連続的に変化させ得るようにしておくのが好ましい
が、管体同士の屈曲量すなわち推進曲線の曲率を段階に
変化させるだけで良い場合には、伸縮押動ジャッキの伸
縮位置および機械的固定手段の固定位置を、段階的に設
定できるようにしておいてもよい。When the telescopic push jack is provided on the auxiliary pipe constituting the leading conductor device together with the leading conductor, the telescopic push jack may be fixedly attached to the pipe. In the case where the jack is provided in a buried pipe or a temporary pipe, it is preferable that the telescopic pushing jack can be removed after the burying work. The mechanical fixing means is provided on the front and rear pipes adjacent to the telescopic pushing jack. As a structure of the mechanical fixing means, in a state where the telescopic push jack is adjusted to an arbitrary telescopic length, if the interval between the front and rear pipes set by the telescopic push jack can be mechanically fixed, Fixing means such as those used in various mechanical devices can be used. Specifically, a fixing means using a bolt and a nut, a fitting fixing means using a key or a fitting uneven portion, or the like can be applied. When the telescopic pushing jack changes its telescopic length continuously, it is preferable that the fixing position of the mechanical fixing means can also be continuously changed. If only the curvature of the propulsion curve needs to be changed stepwise, the telescopic position of the telescopic pushing jack and the fixing position of the mechanical fixing means may be set stepwise.
【0016】機械的固定手段は、伸縮押動ジャッキの作
動機構、例えば伸縮シリンダのピストンなどに、軸と直
交する方向の力が加わり難いように、軸と直交する方向
の外力を確実に負担できるような構造にしておくのが好
ましい。具体的には、伸縮押動ジャッキと平行な軸や管
などの剛性構造体を設けておけばよい。さらに具体的に
は、伸縮押動ジャッキが、前後の先導体および補助管体
のうち一方に取り付けられたシリンダ本体と他方に取り
付けられシリンダ本体に対して出入りするピストンとを
備え、機械的固定手段が、シリンダ本体に設けられピス
トン側に延びる固定軸と、ピストン側に設けられ前記固
定軸が案内される案内板と、固定軸の軸方向の異なる位
置で固定軸と案内板とを締結する締結部材とを備えてい
ることができる。固定軸にボルト軸を用い、案内板には
ボルト軸が挿通されるボルト孔を備えたフランジ板を用
い、締結部材にはボルト軸にねじ込まれるナットを用い
ることができる。固定軸の複数個所に係合孔や係合溝が
設けられ、案内板に締結部材が取り付けられ、締結部材
に設けた係合部が前記固定軸の任意の係合孔や係合溝に
係合可能になったものでもよい。案内板が、案内溝や案
内突条で固定軸を案内するようになっていてもよい。The mechanical fixing means can reliably bear an external force in a direction perpendicular to the axis so that a force in a direction perpendicular to the axis is hardly applied to an operation mechanism of the telescopic pushing jack, for example, a piston of the telescopic cylinder. It is preferable to have such a structure. Specifically, a rigid structure such as a shaft or a tube parallel to the telescopic pushing jack may be provided. More specifically, the telescopic pushing jack includes a cylinder body attached to one of the front and rear leading conductors and the auxiliary pipe, and a piston attached to the other, which moves in and out of the cylinder body. A fixed shaft provided on the cylinder body and extending to the piston side, a guide plate provided on the piston side and guided by the fixed shaft, and a fastening for fastening the fixed shaft and the guide plate at different positions in the axial direction of the fixed shaft. And a member. A bolt shaft may be used as the fixed shaft, a flange plate having a bolt hole through which the bolt shaft is inserted may be used as the guide plate, and a nut screwed into the bolt shaft may be used as the fastening member. An engaging hole or an engaging groove is provided at a plurality of positions of the fixed shaft, a fastening member is attached to the guide plate, and an engaging portion provided on the fastening member is engaged with an arbitrary engaging hole or an engaging groove of the fixed shaft. It may be one that can be combined. The guide plate may guide the fixed shaft by a guide groove or a guide ridge.
【0017】上記のような装置を用いる曲線推進工法と
しては、先導体の後方に埋設管などの後続管体を連結し
た状態で、先導体で地盤に埋設孔を形成し、先導体およ
び後続管体に推進力を加えて、形成された埋設孔に沿っ
て推進させていく点では、従来の通常の推進工法と同様
の方法が用いられる。推進力は、出発立坑などに設置さ
れた元押しジャッキで管列の最後尾に加えるのが普通で
あるが、管列の中央に推進軸を配設し、推進軸の先端を
先導体に連結しておいて、推進軸の後端に元押しジャッ
キで加えた推進力を、先導体から、後方の管体を引っ張
る方向に伝えるようにすることもできる。As a curve propulsion method using the above-described apparatus, a buried hole is formed in the ground with a leading conductor in a state in which a trailing pipe such as a buried pipe is connected behind the leading conductor, and the leading conductor and the trailing pipe are formed. A method similar to a conventional ordinary propulsion method is used in that a propulsion force is applied to the body to propel the body along the formed buried hole. The propulsion is usually applied to the end of the pipe row by a main push jack installed in the starting shaft etc., but the propulsion shaft is arranged in the center of the pipe row and the tip of the propulsion shaft is connected to the leading conductor In addition, the propulsion force applied by the main push jack to the rear end of the propulsion shaft can be transmitted from the front conductor in the direction in which the rear pipe is pulled.
【0018】また、先導体と単独または複数の補助管体
とからなる先導体装置と、後続の埋設管または仮管との
間に、セミシールドジャッキを設けておき、このセミシ
ールドジャッキを伸ばして、先導体装置を前方に推進さ
せて埋設孔を形成させた後、セミシールドジャッキを縮
めるとともに、後続の管列に元押しジャッキなどで推進
力を加えて、後続の管列を、先導体装置に追いつくよう
に、埋設孔に沿って推進させる方法を採用することもで
きる。Further, a semi-shield jack is provided between a leading conductor device comprising a leading conductor and a single or a plurality of auxiliary pipes and a subsequent buried pipe or a temporary pipe, and the semi-shield jack is extended. After the front conductor device is propelled forward to form a buried hole, the semi-shield jack is shrunk, and the propulsion force is applied to the succeeding tube row with a main push jack, etc. In order to catch up, a method of propelling along the buried hole can be adopted.
【0019】先導体または先導体装置を推進させる際に
は、予め、先導体を含む管体同士の間に設けられた伸縮
押動ジャッキの伸縮量を調整して、前後の管体の屈曲角
度を、その地点における埋設孔の所要の曲線形状に合わ
せる。管体同士が所定の屈曲角度になれば、機械的固定
手段で、伸縮押動ジャッキがそれ以上は伸縮しないよう
に、前後の管体同士の間隔を固定する。これで、先導体
および後続管体は、全体が1本の曲線管状に一体化され
た状態になる。このような先導体を含む管体の曲線部分
を前記したような方法で推進させれば、管体の曲線形状
に沿った曲線形状の埋設孔が形成される。When the leading conductor or the leading conductor device is to be propelled, the amount of expansion and contraction of the telescopic pushing jack provided between the tubes including the leading conductor is adjusted in advance, and the bending angles of the front and rear pipes are adjusted. To the required curve shape of the buried hole at that point. When the pipes have a predetermined bending angle, the distance between the front and rear pipes is fixed by mechanical fixing means so that the telescopic pushing jack does not expand or contract any further. As a result, the leading conductor and the trailing tube are integrated into one curved tube as a whole. When the curved portion of the tubular body including the leading conductor is propelled by the above-described method, a buried hole having a curved shape along the curved shape of the tubular body is formed.
【0020】推進施工経路が、曲線部分と直線部分とが
混在していたり、曲率の異なる曲線部分が混在していた
りする場合には、それぞれの個所に合わせて、伸縮押動
ジャッキの伸縮量すなわち管体同士の屈曲角度を変えた
り、機械的固定手段による固定動作および固定解除動作
を繰り返せばよい。曲線推進工法に用いる埋設管とし
て、軸方向に連結された複数の分割管体からなり、各分
割管体が、軸方向の一端に筒状凹部を有し、軸方向の他
端には他の分割管体の前記筒状凹部に径方向に間隔をあ
けて挿入される挿入凸部を有し、前記筒状凹部と前記挿
入凸部との径方向の対向個所には筒状凹部と挿入凸部と
が相対的に移動可能に管内外を密封遮断するシール手段
を備え、前記挿入凸部の先端に配置された先端連結面と
前記筒状凹部の内部に挿入凸部の先端連結面と対向して
配置された内部連結面とが対向する周方向の複数個所に
は、前記先端連結面と内部連結面とを軸方向に許容範囲
内で移動可能に連結するとともに前記許容範囲を変更で
きる連結手段を備えているものが用いられる。In the case where the propulsion construction path includes both a curved portion and a straight line portion or a curved portion having a different curvature, the amount of expansion and contraction of the telescopic pushing jack, ie, the amount of expansion and contraction, is adjusted in accordance with each location. What is necessary is just to change the bending angle between the tubes, or to repeat the fixing operation and the fixing releasing operation by the mechanical fixing means. As the buried pipe used in the curve propulsion method, it is composed of a plurality of divided pipes connected in the axial direction, and each divided pipe has a cylindrical concave portion at one end in the axial direction and another at the other end in the axial direction. The split tubular body has an insertion protrusion inserted into the cylindrical recess at an interval in the radial direction, and a cylindrical recess and an insertion protrusion are provided at radially opposed portions of the cylindrical recess and the insertion protrusion. A sealing means for sealing the inside and outside of the tube so as to be relatively movable, the tip connecting surface disposed at the tip of the insertion projection and the tip connection surface of the insertion projection inside the cylindrical recess. At a plurality of locations in the circumferential direction where the internal connection surfaces arranged opposite to each other are connected in such a manner that the distal end connection surface and the internal connection surface are movably connected in the axial direction within an allowable range, and the allowable range can be changed. The one provided with the means is used.
【0021】分割管体の材料は、鋼や合成樹脂、FR
P、コンクリートなど、通常の埋設管と同様の材料が用
いられる。鋼管の内面にコンクリートを打設したものな
ど、複数の材料からなる複合管材を用いることもでき
る。通常の埋設管は、輸送や立坑への搬入、元押しジャ
ッキによる推進などの作業性その他を考慮して規定長さ
が決められている。分割管体は、このような規定長さの
埋設管を、複数の分割管体で構成すればよい。The material of the divided pipe is steel, synthetic resin, FR
The same materials as ordinary buried pipes such as P and concrete are used. It is also possible to use a composite pipe made of a plurality of materials, such as one in which concrete is cast on the inner surface of a steel pipe. The specified length of a normal buried pipe is determined in consideration of workability such as transportation, loading into a shaft, propulsion by a main jack, and the like. The split pipe may be such that a buried pipe of such a specified length is composed of a plurality of split pipes.
【0022】筒状凹部と挿入凸部は、推進させる埋設孔
の曲率に合わせて分割管体同士が屈曲できる程度の間隔
を、径方向の対向個所に有しているのが好ましい。この
径方向の間隔は、前記した分割管体同士に要求される屈
曲角度、筒状凹部と挿入凸部との軸方向の重なり長さ、
分割管体の径などの条件によって決められる。分割管体
を連結した状態で、分割管体の外面に大きな凹凸が生じ
ないようにすることが好ましい。そのため、筒状凹部の
外形を分割管体全体の外径と同じに設定しておくのが好
ましい。また、分割管体の推進方向に対して、前方側に
挿入凸部を後方側に筒状凹部を設けておけば、地盤から
の抵抗が少なくスムーズな推進施工が行える。It is preferable that the cylindrical concave portion and the insertion convex portion have an interval at a radially opposite point where the divided pipe bodies can be bent in accordance with the curvature of the buried hole to be propelled. This radial interval is the bending angle required for the divided pipes described above, the axial overlapping length of the cylindrical concave portion and the insertion convex portion,
It is determined by conditions such as the diameter of the divided pipe. In a state where the divided pipes are connected, it is preferable that large irregularities are not generated on the outer surface of the divided pipe. Therefore, it is preferable that the outer shape of the cylindrical concave portion is set to be the same as the outer diameter of the entire divided pipe body. In addition, if the insertion convex portion is provided on the front side and the cylindrical concave portion is provided on the rear side with respect to the propulsion direction of the divided pipe body, resistance from the ground is small and smooth propulsion construction can be performed.
【0023】シール手段は、従来、各種機械装置の可動
部分に適用されていたようなシール構造が採用できる。
例えば、筒状凹部と挿入凸部のうち一方の対向面にゴム
や軟質合成樹脂からなるシール材を取り付け、シール材
の端面が他方の対向面に当接するようにしておけばよ
い。他方の対向面に当たるシール材の端面に凹凸やヒレ
などを設けておけばシール機能が高まる。シール手段と
して、OリングとOリングを保持する溝や突起を設けて
おくこともできる。As the sealing means, a sealing structure which has been conventionally applied to movable parts of various mechanical devices can be adopted.
For example, a seal member made of rubber or a soft synthetic resin may be attached to one of the opposing surfaces of the cylindrical concave portion and the insertion convex portion so that the end surface of the seal material contacts the other opposing surface. If irregularities, fins, and the like are provided on the end face of the sealing material that hits the other facing surface, the sealing function is enhanced. O-rings and grooves or projections for holding the O-rings may be provided as sealing means.
【0024】挿入凸部の先端連結面および筒状凹部の内
部連結面は、分割管体を連結した状態で、推進施工時に
加わる負荷に耐えることができる材料および構造を備え
ていればよい。鋼板などの剛性材料で作製するのが好ま
しい。先端連結面および内部連結面は、埋設管の内部で
各種作業を行ったり配管やケーブルを通すのに邪魔にな
らない外周部分のみに設けておくのが好ましい。先端連
結面および内部連結面は、周方向の全周にわたって設け
ておいてもよいし、連結手段を設ける複数個所のみに設
けておいてもよい。The distal end connecting surface of the insertion convex portion and the inner connecting surface of the cylindrical concave portion need only be provided with a material and a structure capable of withstanding a load applied during propulsion construction in a state where the divided pipes are connected. It is preferable to make it from a rigid material such as a steel plate. It is preferable that the distal end connecting surface and the inner connecting surface are provided only on the outer peripheral portion which does not hinder various operations inside the buried pipe or passage of pipes and cables. The tip connection surface and the internal connection surface may be provided over the entire circumference in the circumferential direction, or may be provided only at a plurality of locations where the connection means is provided.
【0025】連結手段は、分割管体同士を推進埋設でき
る程度の機械的強度があり、分割管体同士の屈曲が可能
であれば、各種機械装置における屈曲可能な連結構造が
適用できる。連結手段は、周方向のうち、分割管体を屈
曲させたときに内側になる個所と外側になる個所との少
なくとも対向する2方向に設けておくのが好ましい。周
方向の直交する4方向の全ての方向に連結手段を設けて
おけば、分割管体を任意の方向に屈曲させた場合でも対
応することができる。The connecting means has a mechanical strength enough to allow the divided pipes to be buried and buried, and if the divided pipes can be bent, a flexible connecting structure in various mechanical devices can be applied. It is preferable that the connecting means be provided in at least two opposing directions in the circumferential direction, that is, a part which becomes inside and a part which becomes outside when the divided pipe body is bent. If connecting means are provided in all four directions orthogonal to the circumferential direction, it is possible to cope with the case where the divided pipe is bent in an arbitrary direction.
【0026】周方向の複数個所に設けられる連結手段
は、先端連結面と内部連結面との軸方向の移動許容範囲
を、それぞれ別々に設定できるようにしておくのが好ま
しい。分割管体同士を屈曲させたときに、先端連結面と
内部連結面とが軸方向で大きく離れる個所では前記許容
範囲を広く設定しておく。先端連結面と内部連結面とが
接近する個所では前記許容範囲を狭く設定しておく。It is preferable that the connecting means provided at a plurality of positions in the circumferential direction can separately set the permissible range in the axial direction between the distal end connecting surface and the inner connecting surface. When the divided pipes are bent, the permissible range is set wide where the distal connecting surface and the internal connecting surface are largely separated in the axial direction. The allowable range is set to be small at a place where the front connection surface and the internal connection surface are close to each other.
【0027】連結手段として、先端連結面と内部連結面
を貫通する貫通孔と、貫通孔に挿通される軸部と先端連
結面または内部連結面に係止される頭部とを有する連結
軸体と、連結軸体の頭部との間に先端連結面および内部
連結面を挟んで連結軸体の軸部に固定され先端連結面と
内部連結面との移動範囲を規制する規制部材とを備えて
おくことができる。[0027] As a connecting means, a connecting shaft body having a through hole penetrating the tip connecting surface and the inner connecting surface, a shaft portion inserted through the through hole, and a head engaged with the tip connecting surface or the inner connecting surface. And a regulating member fixed to the shaft portion of the coupling shaft body with the distal coupling surface and the internal coupling surface interposed between the head of the coupling shaft body and regulating a movement range between the distal coupling surface and the internal coupling surface. Can be kept.
【0028】貫通孔は、分割管体同士を屈曲させたとき
に、連結軸体が傾いたりずれたりすることを許容できる
程度に、連結軸体との間に間隔をあけておくのが好まし
い。連結軸体は、推進施工時に加わる負荷に耐える程度
の機械的強度を備えている必要がある。連結軸体の長さ
は、先端連結面と内部連結面との移動許容範囲に対応し
て設定される。連結軸体の頭部は、貫通孔の外側に張り
出して、連結面または内部連結面に係止されるようにな
っていればよい。It is preferable that the through-hole is spaced from the connecting shaft so that the connecting shaft can be allowed to tilt or shift when the divided pipes are bent. The connecting shaft body needs to have mechanical strength enough to withstand the load applied during propulsion construction. The length of the connection shaft body is set in accordance with the allowable movement range of the tip connection surface and the internal connection surface. It is sufficient that the head of the connecting shaft protrudes outside the through-hole and is engaged with the connecting surface or the internal connecting surface.
【0029】連結軸体として、ねじ軸と頭部を備えた通
常のボルトを用いることができる。規制部材として、ボ
ルトにねじ込まれるナットを用いることができる。ナッ
トとして、ダブルナットを用いれば、規制部材の取り付
け位置を確実に決められる。連結軸体の軸部に沿って複
数個所に規制部材を係合する係合孔や係合溝を設けてお
き、これら係合孔や係合溝と規制部材との係合作用で、
規制部材を連結軸体に固定することもできる。ピンやコ
ッタなどを用いて規制部材を連結軸体に固定することも
できる。An ordinary bolt having a screw shaft and a head can be used as the connecting shaft. A nut screwed into a bolt can be used as the regulating member. If a double nut is used as the nut, the mounting position of the regulating member can be reliably determined. An engaging hole or an engaging groove for engaging the regulating member at a plurality of positions along the shaft portion of the connecting shaft body is provided, and the engaging action between the engaging hole and the engaging groove and the regulating member provides
The restricting member can be fixed to the connecting shaft. The restricting member can be fixed to the connecting shaft using a pin or a cotter.
【0030】上記の曲線推進用埋設管は、複数の分割管
体を連結した状態で運搬保管を行うのが取扱いに便利で
ある。但し、個々の分割管体に分解して取扱うこともで
きる。推進施工の際に埋設管同士を連結する際には、前
後の埋設管の分割管体を前記連結手段で屈曲可能に連結
すれば、埋設管同士の屈曲も容易である。上記曲線推進
用埋設管は、前記した伸縮押動ジャッキと機械的固定手
段を利用する曲線推進工法に適用することができる。す
なわち、先導体の後方に前記伸縮押動ジャッキと機械的
固定手段を介して補助管体を連結し、補助管体の後方に
前記曲線推進用埋設管を連結しておき、推進個所の所望
曲率にしたがって、伸縮押動ジャッキで前後の管体を所
定角度に屈曲させ、ついで機械的固定手段で屈曲状態を
固定し、さらに、前記曲線推進用埋設管の各分割管体が
前記所望曲率に対応する屈曲角度に屈曲するように各分
割管体の前記連結手段の前記許容範囲を設定した後、先
導体および補助管体と曲線推進用埋設管とに推進力を加
えて、曲線推進用埋設管を埋設孔に推進埋設していく。It is convenient to handle and transport the above-mentioned curved propulsion buried pipe in a state where a plurality of divided pipes are connected and transported and stored. However, it is also possible to disassemble and handle each divided pipe. When connecting the buried pipes at the time of the propulsion construction, the buried pipes can be easily bent by connecting the divided pipes of the front and rear buried pipes so as to be bendable by the connecting means. The curve propulsion buried pipe can be applied to the curve propulsion method using the above-described telescopic pushing jack and mechanical fixing means. That is, an auxiliary pipe is connected to the rear of the leading conductor via the telescopic pushing jack and mechanical fixing means, and the buried pipe for curved propulsion is connected to the rear of the auxiliary pipe so that the desired curvature of the propulsion point is obtained. According to the above, the front and rear pipes are bent at a predetermined angle by a telescopic pushing jack, then the bent state is fixed by mechanical fixing means, and further, each of the divided pipes of the curved propulsion buried pipe corresponds to the desired curvature. After setting the allowable range of the connecting means of each of the divided pipes so as to bend at a bending angle, the propulsion force is applied to the leading conductor and the auxiliary pipe and the buried pipe for curved propulsion, and the buried pipe for curved propulsion Is buried in the burial hole.
【0031】先導体および補助管体の長さや屈曲角度と
曲線推進用埋設管の各分割管体の長さや屈曲角度とを一
致させておくのが好ましい。曲線推進用埋設管は、推進
施工後に、各分割管体の屈曲角度を固定したり、各分割
管体の連結個所をシール処理したり、各分割管体の内面
側に補強処理を起こったりすることができる。It is preferable that the length and the bending angle of the leading conductor and the auxiliary pipe are equal to the length and the bending angle of each of the divided pipes of the buried pipe for curved propulsion. Curved propulsion buried pipes, after propulsion construction, fix the bending angle of each divided pipe, seal the joint of each divided pipe, or reinforce the inner surface of each divided pipe be able to.
【0032】[0032]
【作用】円周方向に配置された複数の伸縮押動ジャッキ
を用いて、先導体と後続管体あるいは後続管体同士の屈
曲角度を変えて、所望の曲線形状に沿った推進施工を行
う方法は、既に知られている。この発明では、伸縮押動
ジャッキで、前後の管体の屈曲角度を調整した後、その
伸縮状態のまま、機械的固定手段で前後の管体同士の間
隔を固定してしまう。管体同士の間隔が固定されれば、
前後の管体の屈曲角度も固定されてしまう。[Function] A method of performing a propulsion construction along a desired curved shape by changing a bending angle between a leading conductor and a succeeding pipe or between succeeding pipes by using a plurality of telescopic pushing jacks arranged in a circumferential direction. Is already known. In the present invention, after adjusting the bending angles of the front and rear pipes with the telescopic pushing jack, the distance between the front and rear pipes is fixed by the mechanical fixing means in the expanded and contracted state. If the spacing between the tubes is fixed,
The bending angles of the front and rear pipes are also fixed.
【0033】このように、機械的固定手段で屈曲角度が
固定された状態で、先導体を含む管体を推進させれば、
地盤からの反力が変動しても、伸縮押動ジャッキの作動
軸が動いて、先導体および後続管体の曲線形状がずれる
ようなことは起きない。伸縮押動ジャッキの駆動力、例
えば伸縮シリンダの供給流体圧などが変動した場合で
も、機械的固定手段で固定された管体同士の間隔が変わ
ることはない。As described above, if the tube body including the leading conductor is propelled in a state where the bending angle is fixed by the mechanical fixing means,
Even if the reaction force from the ground fluctuates, the operating shaft of the telescopic pushing jack does not move and the curved shapes of the leading conductor and the trailing pipe do not shift. Even when the driving force of the telescopic pushing jack, for example, the supply fluid pressure of the telescopic cylinder, fluctuates, the interval between the tubes fixed by the mechanical fixing means does not change.
【0034】地盤からの反力は、機械的固定手段に加わ
り、機械的固定手段で負担されるので、伸縮押動ジャッ
キに軸と直交する方向に大きな外力が作用することが無
くなる。上記曲線推進工法に用いる曲線推進装置とし
て、伸縮押動ジャッキが、前記シリンダ本体とピストン
を備え、機械的固定手段が、前記固定軸と案内部材と締
結部材とを備えているものであれば、比較的簡単な構造
でありながら、前記した伸縮押動ジャッキおよび機械的
固定手段の機能を確実に果たすことができる。Since the reaction force from the ground is applied to the mechanical fixing means and is borne by the mechanical fixing means, a large external force does not act on the telescopic pushing jack in a direction perpendicular to the axis. As a curve propulsion device used in the curve propulsion method, if the telescopic pushing jack includes the cylinder body and the piston, and the mechanical fixing means includes the fixed shaft, the guide member, and the fastening member, Although the structure is relatively simple, the functions of the telescopic push jack and the mechanical fixing means can be reliably achieved.
【0035】曲線推進工法に用いる埋設管が、前記のよ
うな分割管体を組み合わせたものであれば、分割管体同
士が屈曲するので、曲線推進装置で形成される曲線状の
埋設孔にしたがってスムーズに推進埋設していくことが
できる。分割管体同士の連結個所はシール手段により、
管内への土砂や地下水の流入を良好に阻止することがで
きる。分割管体同士を周方向の複数個所で連結する連結
手段が、前記のように先端連結面と内部連結面すなわち
前後の分割管体の連結個所における軸方向の間隔を許容
範囲内で移動可能に連結できれば、分割管体同士の屈曲
角度を一定の許容範囲に規制することができる。その結
果、地盤の抵抗や土質によって分割管体が予期せぬ方向
に曲がることを防止して、正確な曲線推進施工が可能に
なる。If the buried pipe used in the curve propulsion method is a combination of the above-mentioned divided pipes, the divided pipes bend each other. The propulsion can be buried smoothly. The connecting points between the divided pipes are sealed by sealing means.
The inflow of sediment and groundwater into the pipe can be prevented well. The connecting means for connecting the divided pipes at a plurality of locations in the circumferential direction enables the axial interval at the connection point between the front connection face and the internal connection face, that is, the connection point between the front and rear split pipes, to be movable within an allowable range as described above. If it can be connected, the bending angle between the divided pipes can be regulated within a certain allowable range. As a result, it is possible to prevent the divided pipe from being bent in an unexpected direction due to the resistance of the ground and the soil quality, and to perform accurate curved propulsion construction.
【0036】上記曲線推進用埋設管が、連結手段とし
て、前記のような貫通孔と連結軸体と規制部材とを備え
ているものであれば、比較的簡単な構造でありながら、
前記連結手段としての機能を確実に果たすことができ
る。前記のような曲線推進工法において、先導体と補助
管体の間に前記伸縮押動ジャッキと機械的固定手段を備
え、補助管体の後方に前記曲線推進用埋設管を連結して
おき、先導体と補助管体の屈曲角度を調整して固定し、
曲線推進用埋設管の各分割管体の屈曲角度の許容範囲を
調整した状態で曲線推進を行えば、曲線状の埋設孔の形
成および曲線状の埋設孔にしたがって埋設管の推進埋設
がスムーズに行える。If the buried pipe for curved propulsion has a through hole, a connecting shaft and a regulating member as the connecting means as the connecting means, it has a relatively simple structure.
The function as the connecting means can be reliably achieved. In the curve propulsion method as described above, the telescopic pushing jack and mechanical fixing means are provided between the leading conductor and the auxiliary pipe, and the curve propulsion buried pipe is connected behind the auxiliary pipe, and Adjust and fix the bending angle of the body and auxiliary tube,
If curve propulsion is performed while adjusting the allowable range of the bending angle of each divided pipe body of the curved propulsion buried pipe, the formation of the curved burial hole and the propulsion burial of the buried pipe according to the curved burial hole will be smooth I can do it.
【0037】[0037]
【実施例】ついで、この発明の実施例について、図面を
参照しながら以下に説明する。図1は、曲線推進装置の
全体構造を表している。先導体10は、施工する埋設管
の口径に対応する円形断面を有し、先頭部分に、掘削刃
などが設けられた掘削機構11を備え、掘削機構11の
後方には駆動用モータ12が取り付けられている。掘削
機構11を回転作動させながら、先導体10を地盤内に
押し進めれば、先導体10の外径に相当する埋設孔が形
成される。なお、掘削機構11には、泥水を供給して、
地盤を泥水とともに掘削して後方へと運び出すようにな
っているが、これらの泥水供給機構や排土機構は、通常
の推進装置と同様であるので、図示を省略している。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire structure of the curve propulsion device. The tip conductor 10 has a circular cross section corresponding to the diameter of the buried pipe to be constructed, and is provided with a digging mechanism 11 provided with a digging blade or the like at a head portion, and a driving motor 12 is mounted behind the digging mechanism 11. Have been. If the leading conductor 10 is pushed into the ground while rotating the excavating mechanism 11, a buried hole corresponding to the outer diameter of the leading conductor 10 is formed. In addition, muddy water is supplied to the excavating mechanism 11,
The ground is excavated together with the muddy water and carried out rearward. However, since the muddy water supply mechanism and the earth discharging mechanism are the same as those of a normal propulsion device, they are not shown.
【0038】先導体10の後方には、2個の補助管体2
0a、20bが配置されている。補助管体20a、20
bは、先導体10とほぼ同じ外径を有している。先導体
10と補助管体20aの間は、両管体の内面に取り付け
られた伸縮シリンダ40と固定ボルト装置50で連結さ
れている。図2にも詳しく説明するように、伸縮シリン
ダ40は、油圧シリンダ機構からなり、シリンダ本体4
2の後端にフランジ板43が固定され、その後方で、回
動軸受44を介して、補助管体20aの支持部材22に
固定されている。したがって、伸縮シリンダ40は、補
助管体20aに対して、回動可能に取り付けられている
ことになる。伸縮シリンダ40のピストン44は、シリ
ンダ本体42に対して出入り自在に設けられている。ピ
ストン44の先端にはフランジ板45が取り付けられ、
フランジ板45の前方で、ピストン44は回動軸受46
を介して、先導体10の支持部材13に固定されてい
る。したがって、ピストン44すなわち伸縮シリンダ4
0は、先導体10に対しても回動可能に取り付けられて
いることになる。Behind the leading conductor 10, two auxiliary pipes 2
0a and 20b are arranged. Auxiliary pipes 20a, 20
b has substantially the same outer diameter as the leading conductor 10. The front conductor 10 and the auxiliary pipe 20a are connected by a telescopic cylinder 40 attached to the inner surfaces of both pipes and a fixing bolt device 50. As will be described in detail in FIG. 2, the telescopic cylinder 40 is composed of a hydraulic cylinder mechanism, and the cylinder body 4
A flange plate 43 is fixed to the rear end of the support tube 2, and the rear end of the flange plate 43 is fixed to the support member 22 of the auxiliary pipe 20 a via a rotary bearing 44. Therefore, the telescopic cylinder 40 is rotatably attached to the auxiliary pipe 20a. The piston 44 of the telescopic cylinder 40 is provided so as to be able to move in and out of the cylinder body 42. A flange plate 45 is attached to the tip of the piston 44,
In front of the flange plate 45, the piston 44 is provided with a pivot bearing 46.
Is fixed to the support member 13 of the leading conductor 10 through the wire. Therefore, the piston 44, ie, the telescopic cylinder 4
0 means that it is rotatably attached to the leading conductor 10 as well.
【0039】図3に示すように、伸縮シリンダ40は、
先導体10および補助管体20aの円周方向に等間隔で
四方に設けられており、この複数の伸縮シリンダ40で
先導体10と補助管体20aとが連結一体化されてい
る。直径方向で対向する位置に配置された伸縮シリンダ
40、40のうち、一方のピストン44を伸ばせば、そ
の位置で先導体10と補助管体20aの間隔が拡がり、
他方のピストン44を縮めれば、その位置で先導体10
と補助管体20aの間隔が縮まることになり、縮めたピ
ストン44を有する伸縮シリンダ40の位置を内側にし
て、先導体10と補助管体20aの連結個所が屈曲する
ことになる。このように、一対の対向位置に設けられた
伸縮シリンダ40、40を、互いに逆方向に伸縮させれ
ば、先導体10と補助管体20aを屈曲させることがで
きる。但し、四方の伸縮シリンダ40…の中間になる方
向に、先導体10と補助管体20aを屈曲させる場合に
は、屈曲させたい方向を挟む両側の伸縮シリンダ40を
適切な割合で同時に伸縮させればよい。As shown in FIG. 3, the telescopic cylinder 40 is
The tip conductor 10 and the auxiliary pipe 20a are provided on all four sides at equal intervals in the circumferential direction of the tip conductor 10 and the auxiliary pipe 20a. If one piston 44 is extended among the telescopic cylinders 40 and 40 arranged at diametrically opposed positions, the distance between the leading conductor 10 and the auxiliary pipe 20a is increased at that position,
If the other piston 44 is contracted, the leading conductor 10
The distance between the auxiliary pipe 20a and the auxiliary pipe 20a is reduced, and the connecting portion between the leading conductor 10 and the auxiliary pipe 20a is bent with the position of the telescopic cylinder 40 having the contracted piston 44 inward. In this way, if the telescopic cylinders 40, 40 provided at the pair of opposed positions are expanded and contracted in opposite directions, the leading conductor 10 and the auxiliary pipe 20a can be bent. However, in the case where the leading conductor 10 and the auxiliary pipe 20a are bent in the direction between the four telescopic cylinders 40, the telescopic cylinders 40 on both sides sandwiching the desired bending direction are simultaneously expanded and contracted at an appropriate ratio. I just need.
【0040】つぎに、図2を参照して、ボルトナット固
定装置50の構造を説明する。シリンダ本体42に固定
されたフランジ板43と、ピストン44に固定されたフ
ランジ板45にかけて、伸縮シリンダ40を挟む両側
で、伸縮シリンダ40と平行に、一対のボルト軸52、
52が取り付けられている。シリンダ本体42側のフラ
ンジ板43に対しては、ボルト軸52のボルト頭が掛止
されて抜けないようになっており、ピストン44側のフ
ランジ板45に対しては、フランジ板45に形成された
貫通孔にボルト軸52が通されて、ボルト軸52が軸方
向に自由に通過移動できるようになっている。ボルト軸
52には、フランジ板45の両側で、ナット47、47
がねじ込まれている。一対のナット47、47でフラン
ジ板45を挟み付けるように締め込めば、その位置で、
ボルト軸52とフランジ板45とが締結固定される。ナ
ット47、47を緩めて、フランジ板45から離れるよ
うにすれば、ボルト軸52はフランジ板45に対して軸
方向に自由に移動できるようになる。ボルト軸52のね
じ溝部分は、ピストン44の最大伸縮範囲に合わせて設
定されており、ピストン44が何れの伸縮位置にあって
も、前記一対のナット47、47による、フランジ板4
5とボルト軸52の固定ができるようになっている。Next, the structure of the bolt and nut fixing device 50 will be described with reference to FIG. A flange plate 43 fixed to the cylinder body 42 and a flange plate 45 fixed to the piston 44, a pair of bolt shafts 52 on both sides of the telescopic cylinder 40, parallel to the telescopic cylinder 40,
52 are attached. The bolt head of the bolt shaft 52 is hooked to the flange plate 43 on the cylinder body 42 side so as not to come off, and is formed on the flange plate 45 for the flange plate 45 on the piston 44 side. The bolt shaft 52 is passed through the through hole so that the bolt shaft 52 can freely pass and move in the axial direction. The nuts 47, 47 are provided on the bolt shaft 52 on both sides of the flange plate 45.
Is screwed. If it is tightened so that the flange plate 45 is sandwiched between the pair of nuts 47, 47, at that position,
The bolt shaft 52 and the flange plate 45 are fastened and fixed. If the nuts 47 are loosened and separated from the flange plate 45, the bolt shaft 52 can freely move in the axial direction with respect to the flange plate 45. The thread groove portion of the bolt shaft 52 is set in accordance with the maximum expansion and contraction range of the piston 44, and regardless of the expansion and contraction position of the piston 44, the flange plate 4 is formed by the pair of nuts 47 and 47.
5 and the bolt shaft 52 can be fixed.
【0041】図1に示すように、伸縮シリンダ40およ
びボルトナット固定装置50は、先導体10と補助管体
20aの間だけでなく、補助管体20aと補助管体20
bの間にも設けられている。したがって、この実施例の
先導体装置は、先導体10と補助管体20aの間、およ
び、補助管体20aと補助管体20bの間の2個所で屈
曲できるようになっている。As shown in FIG. 1, the telescopic cylinder 40 and the bolt / nut fixing device 50 are provided not only between the leading conductor 10 and the auxiliary pipe 20a but also between the auxiliary pipe 20a and the auxiliary pipe 20.
b. Therefore, the leading conductor device of this embodiment can be bent at two points between the leading conductor 10 and the auxiliary pipe 20a and between the auxiliary pipe 20a and the auxiliary pipe 20b.
【0042】後端の補助管体20bの後部には、セミシ
ールドジャッキ60が、円周方向の複数個所に取り付け
られている。セミシールドジャッキ60のピストン62
は、ヒューム管などからなる埋設管70の前端に当接さ
れている。埋設管70は、後方にも順次配置されてい
る。すなわち、この実施例では、先導体10と補助管体
20a、20bとで、複数の管体が一体となった先導体
装置を構成しており、このような先導体装置の後方に順
次埋設管を配置して、推進施工を行うことになる。A semi-shield jack 60 is attached to the rear part of the auxiliary pipe 20b at a plurality of positions in the circumferential direction. Piston 62 of semi-shield jack 60
Is in contact with the front end of a buried pipe 70 such as a fume pipe. The buried pipes 70 are also sequentially arranged rearward. That is, in this embodiment, the leading conductor 10 and the auxiliary pipes 20a and 20b constitute a leading conductor device in which a plurality of pipes are integrated. To perform the propulsion construction.
【0043】つぎに、図4には、先導体10と補助管体
20aの連結個所における密封構造を表している。な
お、補助管体20aと20bの連結個所にも同様の構造
が設けられている。図4(a) に示すように、先導体10
の内面には弾力的に変形可能なシール材92が取り付け
られている。補助管体20aには、補助管体20aの内
径よりも少し小さな外径を有する連結管部94が設けら
れている。この連結管部94がシール材92の内面に当
接するようになっており、先導体10および補助管体2
0aの外部空間と内部空間とを密封遮断している。Next, FIG. 4 shows a sealing structure at a connecting portion between the leading conductor 10 and the auxiliary pipe 20a. Note that a similar structure is provided at a connection point between the auxiliary pipes 20a and 20b. As shown in FIG.
An elastically deformable seal material 92 is attached to the inner surface of the. The auxiliary pipe 20a is provided with a connection pipe 94 having an outer diameter slightly smaller than the inner diameter of the auxiliary pipe 20a. The connecting pipe portion 94 comes into contact with the inner surface of the sealing material 92, and the leading conductor 10 and the auxiliary pipe body 2
The outer space 0a is sealed off from the inner space.
【0044】先導体10と補助管体20aが、軸方向に
移動した場合には、シール材92と連結管部94が互い
に摺動することにより、密封遮断状態を維持できる。図
4(b) に示すように、先導体10と補助管体20aが屈
曲するように移動した場合には、シール材92に連結管
部94が傾斜状態で当接するとともに、シール材92が
弾力的に変形することによって、密封遮断状態を維持で
きるようになっている。したがって、一定の許容範囲内
であれば、先導体10と補助管体20aがどのような相
対的運動を行っても、管外空間と管内空間との密封遮断
状態が損なわれることはない。なお、前記図1では、屈
曲状態を判り易くするために、実際よりも拡大して模式
的に図示しているため、先導体10と補助管体20aの
間に隙間があいているように表されているが、実際に
は、図4(b) に示すように、シール材92と連結管部9
4とで密封遮断されている。これは、補助管体20aと
20bの間も同様である。When the leading conductor 10 and the auxiliary pipe 20a move in the axial direction, the sealing member 92 and the connecting pipe 94 slide with each other, so that the hermetically sealed state can be maintained. As shown in FIG. 4B, when the leading conductor 10 and the auxiliary pipe 20a move so as to be bent, the connecting pipe 94 comes in contact with the sealing material 92 in an inclined state, and the sealing material 92 becomes elastic. By deforming the seal, the hermetically sealed state can be maintained. Therefore, as long as it is within a certain allowable range, no matter what relative movement of the leading conductor 10 and the auxiliary pipe 20a, the hermetically sealed state between the outer space and the inner space is not impaired. Note that, in FIG. 1, since the bent state is schematically shown in an enlarged scale compared to the actual state in order to make it easy to understand the bent state, the front pipe 10 and the auxiliary pipe 20a are displayed as if there is a gap. However, in actuality, as shown in FIG.
4 and sealed off. This is the same between the auxiliary pipes 20a and 20b.
【0045】上記のような構造の曲線推進装置を用い
て、曲線推進施工を行う方法について説明する。まず、
先導体10と補助管体20a、および、補助管体20a
と20bの間で、ボルトナット固定装置50を解除し
て、伸縮シリンダ40のピストン44が自由に伸縮でき
るようにしておく。ボルトナット固定装置50の解除
は、前記したとおり、ナット47、47を緩めればよ
い。先導体10がこれから推進される個所の所望曲率に
合わせて、先導体10と補助管体20a、補助管体20
aと20bの連結個所を屈曲させる。具体的には、複数
個所の伸縮シリンダ40、40を、屈曲の内側になる個
所では縮め、屈曲の外側になる個所では伸ばすように、
伸縮調整することになる。先導体10および補助管体2
0a、20bが所定の屈曲角度で屈曲させられると、先
導体装置全体が所望の曲線形状に沿った曲線状の管体を
構成することになる。A method for performing the curve propulsion construction using the curve propulsion device having the above structure will be described. First,
Tip conductor 10, auxiliary pipe 20a, and auxiliary pipe 20a
Between 20 and 20b, the bolt / nut fixing device 50 is released so that the piston 44 of the telescopic cylinder 40 can freely expand and contract. To release the bolt and nut fixing device 50, the nuts 47 may be loosened as described above. According to the desired curvature at the point where the tip conductor 10 is to be propelled from now on, the tip conductor 10 and the auxiliary pipe 20a, the auxiliary pipe 20
The connecting point between a and 20b is bent. Specifically, the telescopic cylinders 40, 40 at a plurality of locations are contracted at locations that are inside the bend, and extended at locations that are outside the bend,
The expansion and contraction will be adjusted. Lead conductor 10 and auxiliary tube 2
When 0a and 20b are bent at a predetermined bending angle, the whole of the leading conductor device constitutes a curved tube along a desired curved shape.
【0046】伸縮シリンダ40…の伸縮調整が終わった
後、固定ボルト装置50において、ナット47、47で
フランジ板45を挟み付け固定すれば、各伸縮シリンダ
40…個所での前後の管体の間隔は固定されてしまう。
すなわち、先導体10と補助管体20a、20bが、そ
れぞれ一定の角度で屈曲された状態で固定されることに
なる。After the expansion and contraction adjustment of the telescopic cylinders 40 is completed, if the flange plate 45 is sandwiched and fixed by the nuts 47 and 47 in the fixing bolt device 50, the distance between the front and rear pipes at each telescopic cylinder 40 is determined. Is fixed.
That is, the leading conductor 10 and the auxiliary tubes 20a and 20b are fixed in a state where they are bent at a certain angle.
【0047】この状態で、セミシールドジャッキ60の
ピストン62を伸ばすと、先導体装置部分が、埋設管7
0の前方に推進される。曲線状の先導体装置部分は、当
然、曲線状の軌跡にしたがって推進され、曲線状の埋設
孔が形成されることになる。このとき、先導体10の先
頭では、掘削機構11により地盤の掘削や土砂の排出作
業が行われることは言うまでもない。In this state, when the piston 62 of the semi-shield jack 60 is extended, the leading conductor device portion is
Propelled forward zero. The curved leading conductor device portion is naturally propelled along a curved trajectory, and a curved buried hole is formed. At this time, it goes without saying that the excavation mechanism 11 performs excavation of the ground and discharge of earth and sand at the head of the leading conductor 10.
【0048】先導体装置部分が、一定の距離まで推進さ
れた後、セミシールドジャッキ60のピストン62を縮
め、埋設管70の列の後端に元押しジャッキなどで推進
力を加える。埋設管70の列は、先導体装置部分で形成
された曲線状の埋設孔に沿って推進されていく。このよ
うな工程を繰り返すことによって、曲線状の埋設孔の形
成および形成された埋設孔への埋設管70の推進埋設施
工が順次進行していく。After the leading conductor device is propelled to a certain distance, the piston 62 of the semi-shield jack 60 is contracted, and a propulsive force is applied to the rear end of the row of the buried pipes 70 by a main pushing jack or the like. The row of buried pipes 70 is propelled along a curved buried hole formed in the leading conductor device portion. By repeating such a process, the formation of the curved buried hole and the burial of the buried pipe 70 into the formed buried hole sequentially progress.
【0049】つぎに、図5から図7に示す埋設管が前記
した曲線推進工法に用いられる。図5に示すように、埋
設管72は3本の分割管体100が軸方向に連結されて
いる。分割管体100は全体が円筒形をなす鋼管からな
り、一端には他の部分よりも外径が少し小さい挿入凸部
120を有し、他端には、挿入凸部120が挿入される
筒状凹部110を有している。筒状凹部110は分割管
体100の他の部分よりも肉厚が薄く、内径が大きくな
っている。筒状凹部110の内径と挿入凸部120の外
径との間には少し間隔があいている。Next, the buried pipe shown in FIGS. 5 to 7 is used in the above-described curve propulsion method. As shown in FIG. 5, the buried pipe 72 has three divided pipe bodies 100 connected in the axial direction. The divided pipe 100 is formed of a steel pipe having a cylindrical shape as a whole, and has an insertion protrusion 120 having an outer diameter slightly smaller than other portions at one end, and a cylinder into which the insertion protrusion 120 is inserted at the other end. It has a concave portion 110. The cylindrical concave portion 110 has a smaller thickness and an inner diameter larger than other portions of the divided pipe body 100. There is a slight gap between the inner diameter of the cylindrical recess 110 and the outer diameter of the insertion protrusion 120.
【0050】挿入凸部120の先端側の外周にはシール
材130が取り付けられている。シール材130は、ゴ
ムや軟質合成樹脂からなり、図7に詳しく表すように、
外周側に突出する複数のヒレ状突起132を有してい
る。ヒレ状突起132は、挿入凸部120の先端側から
分割管体100の中央側に向かって斜め外向きに傾斜し
ている。ヒレ状突起132の外周先端が筒状凹部110
の内面に当接して、挿入凸部120と筒状凹部110と
の隙間を塞ぎ、埋設管72の管内外の密封遮断を果して
いる。挿入凸部120に対して筒状凹部110が軸方向
に移動したり傾いたりしても、ヒレ状突起132が弾力
的に変形して、シール機能を維持することができる。A sealing member 130 is attached to the outer periphery of the insertion projection 120 on the distal end side. The sealing material 130 is made of rubber or soft synthetic resin, and as shown in detail in FIG.
It has a plurality of fin-like projections 132 projecting to the outer peripheral side. The fin-shaped projection 132 is inclined obliquely outward from the distal end side of the insertion convex part 120 toward the center side of the divided tubular body 100. The outer peripheral tip of the fin-like projection 132 is
To close the gap between the insertion convex portion 120 and the cylindrical concave portion 110, thereby sealing off the inside and outside of the buried pipe 72. Even if the cylindrical concave portion 110 moves or tilts in the axial direction with respect to the insertion convex portion 120, the fin-like projection 132 is elastically deformed, and the sealing function can be maintained.
【0051】挿入凸部120の先端には外周から一定の
幅で円環状をなす先端連結板122を有する。筒状凹部
110の内部で挿入凸部120の先端連結板122に対
面する位置には先端連結板122と同じ形状の内部連結
板112を有する。分割管体100で、前後の端部に配
置された先端連結板122と内部連結板112の間に
は、軸方向に延びるリブ板102が取り付けられていて
補強を果している。The distal end of the insertion projection 120 has an annular distal end connecting plate 122 having a constant width from the outer periphery. An internal connecting plate 112 having the same shape as the distal end connecting plate 122 is provided at a position facing the distal end connecting plate 122 of the insertion convex portion 120 inside the cylindrical concave portion 110. In the divided pipe body 100, a rib plate 102 extending in the axial direction is attached between the front end connection plate 122 and the inner connection plate 112 arranged at the front and rear ends, thereby reinforcing the pipe.
【0052】内部連結板112と先端連結板122との
同じ位置に貫通孔114、124を有する。貫通孔11
4、124は、分割管体100の直径方向で対向する2
個所に、それぞれ周方向に少し間隔をあけて2個づつ、
合計4個が配置されている。貫通孔114、124に
は、ボルト140が挿通される。ボルト140は、六角
形状の頭部144とねじが切られたねじ軸142を有す
る。図7に示すように、内部連結板112と先端連結板
122との対面個所で、ボルト140の頭部144がワ
ッシャ148を介して内部連結板112の外側に配置さ
れ、ねじ軸142が貫通孔114、124を通って先端
連結板122の外側に長く突出する。貫通孔114、1
24の内径は、ねじ軸142の外径よりも少し大きく設
定されており、ねじ軸142が貫通孔114、124に
対してある程度は傾けいたり径方向にずれたりできるよ
うになっている。The through holes 114 and 124 are provided at the same position as the inner connecting plate 112 and the tip connecting plate 122. Through hole 11
Reference numerals 4 and 124 denote 2 which oppose each other in the diameter direction of the divided pipe body 100.
At each location, two at a slight interval in the circumferential direction,
A total of four are arranged. Bolts 140 are inserted into the through holes 114 and 124. Bolt 140 has a hexagonal head 144 and a threaded screw shaft 142. As shown in FIG. 7, the head 144 of the bolt 140 is disposed outside the internal connection plate 112 via the washer 148 at a location where the internal connection plate 112 and the distal end connection plate 122 face each other, and the screw shaft 142 is provided with a through hole. It protrudes long outside the tip connecting plate 122 through 114 and 124. Through hole 114, 1
The inner diameter of the screw shaft is set to be slightly larger than the outer diameter of the screw shaft 142 so that the screw shaft 142 can be inclined or radially displaced to some extent with respect to the through holes 114 and 124.
【0053】先端連結板122の外側に突出したねじ軸
142には、2個のナット146、146がねじ込まれ
ていて、いわゆるダブルナットを構成している。すなわ
ち、ナット146、146が互いに接近するように逆方
向にねじ回せば、ナット146、146がねじ軸142
に固定される。ナット146、146を互いに離れる逆
方向にねじ回せば、ナット146、146はねじ軸14
2に沿って自由に移動できるようになる。ナット146
と先端連結板12の間にもワッシャ148を挿入してお
くことができる。Two nuts 146 and 146 are screwed into the screw shaft 142 protruding outside the distal end connecting plate 122 to constitute a so-called double nut. That is, if the nuts 146 and 146 are screwed in opposite directions so as to approach each other, the nuts 146 and 146 are
Fixed to If the nuts 146 and 146 are screwed in opposite directions away from each other, the nuts 146 and 146
2 can move freely. Nut 146
The washer 148 can also be inserted between the and the tip connecting plate 12.
【0054】ナット146、146をねじ軸142に固
定した状態では、内部連結板112と先端連結板122
は、ボルト140の頭部144とナット146の間隔で
前後に移動したり傾いたりできる。上記のような構造の
分割管体100…で構成された埋設管72は、各分割管
体100…の連結個所のうち、直径方向で対向する個所
に設けられたボルト140におけるナット146、14
6の固定位置を調整することで、前後の分割管体10
0、100の屈曲可能な角度範囲を決めることができ
る。When the nuts 146 and 146 are fixed to the screw shaft 142, the inner connecting plate 112 and the tip connecting plate 122
Can move back and forth or tilt at the interval between the head 144 of the bolt 140 and the nut 146. The buried pipe 72 composed of the divided pipes 100 having the above-described structure is provided with nuts 146 and 14 of the bolts 140 provided at diametrically opposed locations among the connecting locations of the divided pipes 100.
By adjusting the fixing position of 6, the front and rear divided pipes 10
A bendable angle range of 0, 100 can be determined.
【0055】例えば、図6に示すように、直径方向の1
方側に設けられた2個のボルト140、140では、ナ
ット146、146の固定位置をねじ軸142の先端側
に設定して、先端連結板122と内部連結板142とが
広い範囲で動けるようにしておき、直径方向の他方側に
設けられた2個のボルト140、140では、ナット1
46、146の固定位置を頭部144側に近づけて、先
端連結板122と内部連結板142との動ける範囲が狭
くなるようにしておく。For example, as shown in FIG.
With the two bolts 140 provided on one side, the fixing positions of the nuts 146 and 146 are set on the distal end side of the screw shaft 142 so that the distal end connecting plate 122 and the internal connecting plate 142 can move over a wide range. And the two bolts 140, 140 provided on the other side in the diametric direction
The fixed positions of 46 and 146 are moved closer to the head 144 side so that the movable range between the distal end connecting plate 122 and the inner connecting plate 142 is narrowed.
【0056】この状態で、前後の分割管体100、10
0を屈曲させようとすると、先端連結板122と内部連
結板142との動ける範囲が狭い側を内側に、先端連結
板122と内部連結板142との動ける範囲が広い側を
外側にして、分割管体100、100が屈曲することは
できるが、その逆方向に分割管体100、100を屈曲
させることはできない。直径方向で対向する2個所にお
ける先端連結板122と内部連結板112との動ける範
囲の差が大きいほど、前後の分割管体100、100を
大きく屈曲させることが可能になる。In this state, the front and rear divided pipes 100, 10
In order to bend 0, the side where the movable range between the distal end connecting plate 122 and the internal connecting plate 142 is narrow is inward, and the side where the movable range between the distal end connecting plate 122 and the internal connecting plate 142 is wide is outside, and the division is performed. The tubes 100, 100 can be bent, but the split tubes 100, 100 cannot be bent in the opposite direction. The larger the difference in the movable range between the distal end connecting plate 122 and the inner connecting plate 112 at the two diametrically opposed locations, the more the front and rear divided pipes 100 can be bent.
【0057】上記のような構造の埋設管72を用いて曲
線推進工法を実施するには、基本的には前記した図1な
どに示した曲線推進装置と組み合わせて前記同様の手順
で施工すればよい。埋設管72は、各分割管体100…
を直線状に連結した状態で、運搬保管や立坑内への吊り
降ろし作業など行えば、通常の直管状の埋設管と同様の
取扱いが行える。この場合、各分割管体100…の連結
個所では、内部連結板112と先端連結板122とが一
体化するように、全ての方向のボルト140でナット1
46、146を頭部144側に近い位置で固定しておけ
ば、埋設管72が取扱い中に折れ曲がるようなことがな
い。In order to carry out the curve propulsion method using the buried pipe 72 having the above-described structure, basically, the construction is performed in the same procedure as described above in combination with the curve propulsion device shown in FIG. Good. The buried pipe 72 is formed of each divided pipe 100.
In a state where the pipes are connected in a straight line, if they are transported, stored, or suspended in a shaft, the same handling as that of a normal straight tubular buried pipe can be performed. In this case, at the connection points of the divided pipe bodies 100, the nuts 1 are bolted 140 in all directions so that the internal connection plate 112 and the front end connection plate 122 are integrated.
If 46 and 146 are fixed at positions close to the head 144 side, the buried pipe 72 will not bend during handling.
【0058】埋設管72を補助管体20bの後方に連結
して曲線推進を行う前には、埋設管72の各分割管体1
00同士の屈曲可能な角度範囲を、埋設孔の曲率すなわ
ち先導体10および補助管体20a、20bの屈曲角度
に合わせて調整しておく。具体的には、先導体10およ
び補助管体20a、20bの屈曲角度が、各分割管体1
00同士の屈曲可能な角度の最大値程度になるようにす
る。そのために、各分割管体100の連結個所では、前
記したボルト140に対するナット146、146の固
定位置を前後に調整する作業を行う。Before connecting the buried pipe 72 to the rear of the auxiliary pipe body 20b and performing curve propulsion, each divided pipe body 1 of the buried pipe 72 is required.
The range of bendable angles between 00 and 00 is adjusted in accordance with the curvature of the buried hole, that is, the bend angles of the leading conductor 10 and the auxiliary pipes 20a and 20b. Specifically, the bending angle of the tip conductor 10 and the auxiliary pipes 20a and 20b is set to
The angle is set to be about the maximum value of the bendable angle between 00's. For this purpose, at the connecting portion of each divided pipe body 100, an operation of adjusting the fixing positions of the nuts 146 and 146 with respect to the bolt 140 described above is performed.
【0059】このような状態で先導体10および補助管
体20a、20bさらには埋設管72の列に元押しジャ
ッキなどで推進力を加えて、全体の列を地盤内に曲線状
に推進させていく。前記したとおり、先導体10および
補助管体20a、20bは屈曲角度が機械的固定手段で
固定されているので、固定された屈曲角度にしたがって
推進され、所定の曲率を有する曲線状の埋設孔が形成さ
れる。In such a state, a propulsive force is applied to the row of the leading conductor 10, the auxiliary pipes 20a and 20b, and the row of the buried pipes 72 with a main push jack or the like, so that the entire row is propelled into the ground in a curved shape. Go. As described above, since the bending angle of the leading conductor 10 and the auxiliary pipes 20a and 20b is fixed by the mechanical fixing means, the propulsion is performed according to the fixed bending angle, and the curved burial hole having a predetermined curvature is formed. It is formed.
【0060】埋設管72は、推進力により埋設孔に沿っ
て推進される。このとき、各分割管体100…は、地盤
からの抵抗力を受けることで、埋設孔の曲率に沿って屈
曲しながら曲線状に推進される。そして、各分割管体1
00…は、前記したように、周方向の複数個所に設けら
れた各ボルト140とナット146、146で規制され
た範囲でしか屈曲することができず、所定の屈曲角度以
上に屈曲したり、異なる方向に屈曲したりすることはで
きない。したがって、埋設管72が、先導体10などで
形成された埋設孔から外れて、予期せぬ方向に推進され
ることが阻止され、正確な曲線推進が可能になる。The buried pipe 72 is propelled along the buried hole by a propulsive force. At this time, the divided pipes 100 are propelled in a curved shape while being bent along the curvature of the buried hole by receiving the resistance force from the ground. And each divided pipe 1
00 can be bent only within the range regulated by the bolts 140 and the nuts 146 and 146 provided at a plurality of locations in the circumferential direction as described above, and can be bent at a predetermined bending angle or more. It cannot bend in different directions. Therefore, the buried pipe 72 is prevented from coming off from the buried hole formed by the leading conductor 10 or the like and being propelled in an unexpected direction, and accurate curved propulsion becomes possible.
【0061】埋設管72が、所定の位置に推進埋設され
た後、各分割管体100…の外周内面にコンクリートを
打設しておけば、埋設管72の補強あるいは各分割管体
100…の連結個所の固定および密封遮蔽を行うことが
できる。コンクリートで、内部連結板112および先端
連結板122とリブ板102で囲まれた空間をボルト1
40を含めて埋め込んでしまえばよい。このようにすれ
ば、施工後に分割管体100の屈曲角度が変わることが
なく、埋設管72の管内に突起物が露出することもなく
なる。After the buried pipe 72 is buried at a predetermined position, concrete is cast on the inner peripheral surface of each of the divided pipes 100. The fastening and sealing of the connection points can be performed. The space surrounded by the inner connecting plate 112, the tip connecting plate 122, and the rib plate 102 is made of concrete.
What is necessary is just to embed it including 40. By doing so, the bending angle of the divided pipe body 100 does not change after construction, and no projection is exposed in the buried pipe 72.
【0062】[0062]
【発明の効果】以上に述べた、この発明にかかる曲線推
進工法および装置によれば、伸縮押動ジャッキで、先導
体を含む管体同士を曲線形状に沿って屈曲させた後、こ
の屈曲状態を機械的固定手段で固定してから、先導体を
含む管体の曲線推進を行うので、曲線推進を行う際に、
地盤などから受ける反力は全て、機械的固定手段で負担
でき、伸縮押動ジャッキに無理な力が加わったり、反力
の変動に伴って伸縮押動ジャッキの伸縮位置が動いてし
まったりする問題が生じない。According to the curve propulsion method and apparatus according to the present invention described above, the tubes including the leading conductor are bent along the curved shape by the telescopic pushing jack, and then the bent state is obtained. Is fixed by mechanical fixing means, then the curve propulsion of the tube including the tip conductor is performed, so when performing curve propulsion,
All the reaction force received from the ground etc. can be borne by mechanical fixing means, and excessive force is applied to the telescopic pushing jack, and the telescopic pushing jack's telescopic position moves with fluctuation of the reaction force. Does not occur.
【0063】その結果、所望の曲線形状に沿った正確な
曲線推進施工が行え、大きな曲率で曲線推進施工を行っ
ても、伸縮押動ジャッキが損傷したり作動不良を起こし
たりすることがなくなる。したがって、伸縮押動ジャッ
キの利点である迅速でスムーズな屈曲動作の利点を損な
うことなく、伸縮押動ジャッキを用いた場合の前記欠点
を解消することができ、曲線推進工法の作業能率や品質
性能の向上に貢献することができる。As a result, accurate curved propulsion construction along a desired curve shape can be performed, and even if the curved propulsion construction is performed with a large curvature, the telescopic pushing jack is not damaged or malfunction occurs. Therefore, it is possible to eliminate the above-mentioned disadvantages when using the telescopic pushing jack without deteriorating the advantage of the quick and smooth bending operation, which is an advantage of the telescopic pushing jack, and to improve the work efficiency and the quality performance of the curve propulsion method. Can be improved.
【0064】曲線推進装置として、伸縮押動ジャッキ
が、前記シリンダ本体とピストンを備え、機械的固定手
段が、前記固定軸と案内部材と締結部材とを備えている
ものであれば、曲線の推進が確実に行えるとともに構造
が簡単で場所を取らず製造コストも安価になる。曲線推
進工法に用いる埋設管が、前記のような構造の分割管体
を組み合わせたものであれば、分割管体を所望の曲線状
に屈曲させてスムーズに推進させることができ、曲線推
進方向の施工能率を向上できる。しかも、分割管体は、
所定の屈曲角度以上に曲がったり、逆の方向に曲がった
りすることがないので、地盤状況などの施工条件に関わ
らず、正確な曲線推進施工が可能になる。As a curved propulsion device, if a telescopic pushing jack includes the cylinder body and the piston and the mechanical fixing means includes the fixed shaft, a guide member and a fastening member, the propulsion of the curved line is performed. Can be performed reliably, the structure is simple, the space is not required, and the manufacturing cost is low. If the buried pipe used in the curve propulsion method is a combination of the divided pipes having the above-described structure, the divided pipes can be bent into a desired curve and smoothly propelled. Construction efficiency can be improved. Moreover, the split tube is
Since it does not bend beyond a predetermined bending angle or bends in the opposite direction, accurate curve propulsion construction becomes possible regardless of construction conditions such as ground conditions.
【0065】上記曲線推進用埋設管が、連結手段とし
て、前記のような貫通孔と連結軸体と規制部材とを備え
ているものであれば、分割管体の屈曲角度を簡単な操作
で正確に規制することができ、曲線推進施工の作業性を
向上できるとともに、構造が簡単で場所を取らないの
で、埋設管の製造コストが高くならず埋設管内の利用ス
ペースも十分に確保することができる。If the buried pipe for curved propulsion is provided with the above-mentioned through-hole, connecting shaft and regulating member as connecting means, the bending angle of the divided pipe can be accurately determined by a simple operation. It can improve the workability of curve propulsion construction, and since the structure is simple and occupy no space, the production cost of the buried pipe is not increased and the space used in the buried pipe can be sufficiently secured. .
【0066】前記のような曲線推進工法において、先導
体と補助管体の間に前記伸縮押動ジャッキと機械的固定
手段を備え、補助管体の後方に前記曲線推進用埋設管を
連結しておき、先導体と補助管体の屈曲角度を調整して
固定し、曲線推進用埋設管の各分割管体の屈曲角度の許
容範囲を調整した状態で曲線推進を行えば、曲線状の埋
設孔の形成および曲線状の埋設孔にしたがって埋設管の
推進埋設がスムーズに行え、曲線推進工法の施工精度お
よび作業能率の向上を図ることができる。In the above curve propulsion method, the telescopic pushing jack and mechanical fixing means are provided between the leading conductor and the auxiliary pipe, and the curve propulsion buried pipe is connected behind the auxiliary pipe. When the curve propulsion is performed while adjusting the bending angle between the tip conductor and the auxiliary pipe and fixing it, and adjusting the allowable range of the bending angle of each divided pipe of the curve propulsion buried pipe, the curved buried hole And the burial pipe can be smoothly buried in accordance with the formation of the curved buried hole, and the construction accuracy and work efficiency of the curved propulsion method can be improved.
【図1】 この発明の実施例を表す曲線推進装置の断面
図FIG. 1 is a cross-sectional view of a curve propulsion device showing an embodiment of the present invention.
【図2】 伸縮シリンダとボルトナット固定装置の拡大
構造図FIG. 2 is an enlarged structural view of a telescopic cylinder and a bolt and nut fixing device.
【図3】 図1のA−A線における拡大断面図FIG. 3 is an enlarged sectional view taken along line AA of FIG. 1;
【図4】 管体の連結個所における密封構造とその動作
を表す拡大断面図FIG. 4 is an enlarged sectional view showing a sealing structure and an operation at a connecting portion of a pipe body.
【図5】 曲線推進用埋設管の半断面側面図FIG. 5 is a half sectional side view of a buried pipe for curved propulsion.
【図6】 図5のA−A線断面図FIG. 6 is a sectional view taken along line AA of FIG. 5;
【図7】 分割管体の連結構造を詳細に表す要部拡大断
面図FIG. 7 is an enlarged cross-sectional view of a main part showing a connection structure of the divided pipe bodies in detail.
10 先導体 11 掘削機構 12 駆動モータ 20 補助管体 40 伸縮シリンダ 50 ボルトナット固定装置 60 セミシールドジャッキ 70、72 埋設管 100 分割管体 110 筒状凹部 112 内部連結板 114 貫通孔 120 挿入凸部 122 先端連結板 124 貫通孔 130 シール材 140 ボルト 146 ナット DESCRIPTION OF SYMBOLS 10 Lead conductor 11 Excavation mechanism 12 Drive motor 20 Auxiliary pipe 40 Telescopic cylinder 50 Bolt and nut fixing device 60 Semi-shield jack 70, 72 Buried pipe 100 Split pipe 110 Cylindrical recess 112 Internal connection plate 114 Through hole 120 Insertion convex part 122 Tip connecting plate 124 Through hole 130 Seal material 140 Bolt 146 Nut
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鍋谷 茂 奈良県桜井市大字大福390−16 (56)参考文献 実開 平1−84393(JP,U) (58)調査した分野(Int.Cl.6,DB名) E21D 9/06 311────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Shigeru Nabeya 390-16 Daifuku, Oaza, Sakurai City, Nara Prefecture (56) References: 1-84393, JP-A (JP, U) (58) Field surveyed (Int. Cl. 6 , DB name) E21D 9/06 311
Claims (6)
管を前記曲線状の埋設孔に沿って埋設する曲線推進工法
において、先導体および先導体の後方に連結される後続
管体からなる複数の管体を、互いの対向面で円周方向の
複数個所に伸縮押動ジャッキを介して、屈曲自在に連結
しておくとともに、前記伸縮押動ジャッキに隣接して、
伸縮押動ジャッキが任意の伸縮状態で、前後の管体の間
隔を機械的に固定する機械的固定手段を設けておき、推
進個所の所望曲率にしたがって、前記伸縮押動ジャッキ
で前後の管体を所定角度に屈曲させ、ついで機械的固定
手段で屈曲状態を固定した後、先導体を含む複数の管体
に推進力を加えて、曲線状に推進させることを特徴とす
る曲線推進工法。In a curved propulsion method in which a curved buried hole is formed by a leading conductor and a buried pipe is buried along the curved buried hole, a leading conductor and a succeeding pipe connected behind the leading conductor are provided. A plurality of pipes consisting of, at the opposing surfaces, at a plurality of locations in the circumferential direction via telescopic push jacks, while being flexibly connected, adjacent to the telescopic push jack,
When the telescopic push jack is in an arbitrary telescopic state, mechanical fixing means for mechanically fixing the interval between the front and rear pipes is provided, and the front and rear pipes are stretched by the telescopic push jack according to a desired curvature of a propulsion point. A curved propulsion method characterized by bending a plurality of pipes including a leading conductor by applying a propulsion force to the plurality of pipes including a leading conductor after bending the pipe at a predetermined angle and then fixing the bent state by mechanical fixing means.
先導体および先導体の後方に連結される単独または複数
の補助管体を備え、先導体および補助管体の互いの対向
面で円周方向の複数個所に伸縮押動ジャッキを介して、
先導体および補助管体が屈曲自在に連結されているとと
もに、前記伸縮押動ジャッキに隣接して、伸縮押動ジャ
ッキが任意の伸縮状態で、前後の先導体または補助管体
の間隔を機械的に固定する機械的固定手段が設けられて
いることを特徴とする曲線推進装置。2. An apparatus for use in the method of claim 1, wherein:
A single conductor or a plurality of auxiliary pipes connected to the back of the leading conductor and the leading conductor are provided, and via a telescopic pushing jack at a plurality of positions in the circumferential direction on the mutually facing surfaces of the leading conductor and the auxiliary pipe,
The leading conductor and the auxiliary pipe are flexibly connected, and the telescopic pushing jack is adjacent to the telescopic pushing jack. A curved propulsion device, wherein a mechanical fixing means for fixing the propulsion device is provided.
ッキが、前後の先導体および補助管体のうち一方に取り
付けられたシリンダ本体と他方に取り付けられシリンダ
本体に対して出入りするピストンとを備え、機械的固定
手段が、シリンダ本体に設けられピストン側に延びる固
定軸と、ピストン側に設けられ前記固定軸が案内される
案内部材と、固定軸の軸方向の異なる位置で固定軸と案
内部材とを締結する締結部材とを備えている曲線推進装
置。3. The apparatus according to claim 2, wherein the telescopic push jack comprises a cylinder body attached to one of the front and rear leading conductors and the auxiliary pipe, and a piston attached to the other, which moves in and out of the cylinder body. A fixed shaft provided on the cylinder body and extending toward the piston; a guide member provided on the piston side for guiding the fixed shaft; and a fixed shaft and a guide at different positions in the axial direction of the fixed shaft. A curve propulsion device comprising: a fastening member for fastening the member.
なり、各分割管体が、軸方向の一端に筒状凹部を有し、
軸方向の他端には他の分割管体の前記筒状凹部に径方向
に間隔をあけて挿入される挿入凸部を有し、前記筒状凹
部と前記挿入凸部との径方向の対向個所には筒状凹部と
挿入凸部とが相対的に移動可能に管内外を密封遮断する
シール手段を備え、前記挿入凸部の先端に配置された先
端連結面と前記筒状凹部の内部に挿入凸部の先端連結面
と対向して配置された内部連結面とが対向する周方向の
複数個所には、前記先端連結面と内部連結面とを軸方向
に許容範囲内で移動可能に連結するとともに前記許容範
囲を変更できる連結手段を備えている曲線推進用埋設
管。4. A plurality of divided pipes connected in the axial direction, each of which has a cylindrical recess at one end in the axial direction.
At the other end in the axial direction, there is an insertion protrusion inserted into the cylindrical recess of the other divided tube at a distance in the radial direction, and the cylindrical recess and the insertion protrusion are radially opposed to each other. The cylindrical concave portion and the insertion convex portion are provided with sealing means for hermetically sealing the inside and outside of the tube so that the cylindrical concave portion and the insertion convex portion can relatively move, and a distal end connecting surface disposed at the distal end of the insertion convex portion and the inside of the cylindrical concave portion. At a plurality of locations in the circumferential direction where the distal connection surface of the insertion convex portion and the internal connection surface disposed opposite to each other are connected, the distal connection surface and the internal connection surface are movably connected in the axial direction within an allowable range. And a buried pipe for curved propulsion, comprising a connecting means capable of changing the allowable range.
連結手段が、先端連結面と内部連結面を貫通する貫通孔
と、貫通孔に挿通される軸部と先端連結面または内部連
結面に係止される頭部とを有する連結軸体と、連結軸体
の頭部との間に先端連結面および内部連結面を挟んで連
結軸体の軸部に固定され先端連結面と内部連結面との移
動範囲を規制する規制部材とを備えている曲線推進用埋
設管。5. The buried pipe for curved propulsion according to claim 4, wherein:
A connection shaft having a through-hole penetrating the distal connection surface and the internal connection surface, a shaft inserted through the through-hole, and a head locked to the distal connection surface or the internal connection surface; A curve fixed to the shaft portion of the connecting shaft body with the tip connecting surface and the inner connecting surface interposed between the head portion of the shaft body and a regulating member that regulates a movement range between the tip connecting surface and the inner connecting surface; Buried pipe for propulsion.
は請求項5の曲線推進用埋設管を用い、先導体の後方に
前記伸縮押動ジャッキと機械的固定手段を介して補助管
体を連結し、補助管体の後方に前記曲線推進用埋設管を
連結しておき、推進個所の所望曲率にしたがって、伸縮
押動ジャッキで前後の管体を所定角度に屈曲させ、つい
で機械的固定手段で屈曲状態を固定し、さらに、前記曲
線推進用埋設管の各分割管体が前記所望曲率に対応する
屈曲角度に屈曲するように各分割管体の前記連結手段の
前記許容範囲を設定した後、先導体および補助管体と曲
線推進用埋設管とに推進力を加えて、曲線推進用埋設管
を埋設孔に推進埋設していく曲線推進工法。6. The method according to claim 1, wherein the auxiliary pipe body is provided behind the leading conductor via the telescopic pushing jack and mechanical fixing means, using the buried pipe for curved propulsion according to claim 4 or 5. Connected, the curved propulsion buried pipe is connected behind the auxiliary pipe, and the front and rear pipes are bent at a predetermined angle by a telescopic pushing jack according to the desired curvature of the propulsion point, and then mechanical fixing means After fixing the bending state, and after setting the allowable range of the connecting means of each of the divided pipes so that each of the divided pipes of the buried pipe for curved propulsion is bent at a bending angle corresponding to the desired curvature. A curve propulsion method in which the propulsion force is applied to the leading conductor, the auxiliary pipe, and the buried pipe for curved propulsion, and the buried pipe for curved propulsion is buried in the burial hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6183604A JP2791398B2 (en) | 1993-08-06 | 1994-08-04 | Curved propulsion method and equipment and buried pipe for curved propulsion |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19633893 | 1993-08-06 | ||
JP5-196338 | 1993-08-06 | ||
JP6183604A JP2791398B2 (en) | 1993-08-06 | 1994-08-04 | Curved propulsion method and equipment and buried pipe for curved propulsion |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0797895A JPH0797895A (en) | 1995-04-11 |
JP2791398B2 true JP2791398B2 (en) | 1998-08-27 |
Family
ID=26501972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6183604A Expired - Fee Related JP2791398B2 (en) | 1993-08-06 | 1994-08-04 | Curved propulsion method and equipment and buried pipe for curved propulsion |
Country Status (1)
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JP (1) | JP2791398B2 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4583630B2 (en) * | 2000-02-22 | 2010-11-17 | 奥村組土木興業株式会社 | Digging equipment |
JP2002276287A (en) * | 2001-03-16 | 2002-09-25 | Okumura Engineering Corp | Curved line forming device |
KR100454436B1 (en) * | 2002-03-22 | 2004-10-26 | 주식회사 구룡건설 | Direction controlling method and apparatus in pushing horizontal pipe jacking method |
JP4611241B2 (en) * | 2006-05-08 | 2011-01-12 | 株式会社エム・シー・エル・コーポレーション | Small diameter pipe drilling equipment and drilling system |
JP2008045385A (en) * | 2006-08-21 | 2008-02-28 | Sanwa Kizai Co Ltd | Water-pressure feeder to water-pressure cylinder for compensation for buried-pipe propulsive-direction compensator |
JP2008057128A (en) * | 2006-08-29 | 2008-03-13 | Ohmoto Gumi Co Ltd | Conduit construction method |
KR101646389B1 (en) * | 2014-11-25 | 2016-08-08 | 최희숙 | The front structure for constructing non-excavation type tunnel structure |
KR101653658B1 (en) * | 2015-10-16 | 2016-09-02 | 석정건설(주) | Propulsion pipe for preventing eccentric of improving thrust |
CN117605877A (en) * | 2023-11-23 | 2024-02-27 | 广东东方管业有限公司 | Self-anchored pipe and non-excavation directional crossing construction method thereof |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0184393U (en) * | 1987-11-27 | 1989-06-05 |
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1994
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JPH0797895A (en) | 1995-04-11 |
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