JPH05126280A - Method for laying corrugated flexible pipe - Google Patents
Method for laying corrugated flexible pipeInfo
- Publication number
- JPH05126280A JPH05126280A JP28796191A JP28796191A JPH05126280A JP H05126280 A JPH05126280 A JP H05126280A JP 28796191 A JP28796191 A JP 28796191A JP 28796191 A JP28796191 A JP 28796191A JP H05126280 A JPH05126280 A JP H05126280A
- Authority
- JP
- Japan
- Prior art keywords
- clamp
- flexible pipe
- corrugated flexible
- wire
- intervals
- 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.)
- Granted
Links
Landscapes
- Electric Cable Installation (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、波形可撓パイプの布設
工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laying a corrugated flexible pipe.
【0002】[0002]
【従来の技術】最近、地中ケーブルの布設を行う場合に
は、例えば図8に示すようなポリエチレン製等の波形可
撓パイプ1を予め地中に埋設しておき、これにケーブル
を引入れる工法が盛んに用いられている。2. Description of the Related Art Recently, when laying an underground cable, a corrugated flexible pipe 1 made of polyethylene, for example, as shown in FIG. 8 is buried in the ground in advance and the cable is inserted therein. The construction method is widely used.
【0003】しかし、上記波形可撓パイプ1自体を布設
する場合には、あまり大きな張力Tをかけるとパイプが
図9の(a)に符号1aで示すように軸方向に伸びて変
形するため、波の高さが小さくなって半径方向の抗力が
低下し、圧縮力Pを受けるとパイプ自体が同図の(b)
に符号1bで示すように潰れてしまう可能性がある。そ
のため、波形可撓パイプの布設では、一般に地表を掘り
起こし、その中にパイプを入れて埋め戻す工法が取られ
てきている。However, when the corrugated flexible pipe 1 itself is laid, if a too large tension T is applied, the pipe is stretched and deformed in the axial direction as indicated by reference numeral 1a in FIG. When the wave height decreases and the radial drag decreases, the pipe itself receives the compressive force P (b) in the same figure.
There is a possibility of being crushed as indicated by reference numeral 1b. Therefore, in laying a corrugated flexible pipe, a method of digging up the surface of the ground and inserting the pipe into the ground to backfill is generally adopted.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、最近の
都市部では、地表の掘り起しは交通制限を必要とするな
どの問題が多いため、地中に穴を開けるシールド工法に
変わりつつある。この場合には、前述の問題があるた
め、引入れ長さが著しく制限され、例えば直径が100 m
mのポリエチレンパイプの場合では約25cm程度とな
り、長尺布設が必要な場合にはこの間隔毎に地表にハン
ドホールを設けるなどの処置が必要となり、能率、コス
ト上にも問題が多い。However, in recent urban areas, there are many problems such as the need to restrict the traffic to dig up the surface of the earth, and therefore the shield construction method for making a hole in the ground is changing. In this case, due to the above-mentioned problems, the drawing length is significantly limited, for example, the diameter is 100 m.
In the case of a polyethylene pipe of m, the length is about 25 cm, and when long laying is required, it is necessary to take measures such as providing a handhole on the surface of the ground at every interval, and there are many problems in terms of efficiency and cost.
【0005】そこで、本発明の目的は、上記課題を解決
し、長尺の波形可撓パイプを伸び変形させずに地中穴に
容易に引入れることができる波形可撓パイプの布設工法
を提供することにある。Therefore, an object of the present invention is to solve the above problems and provide a method for laying a corrugated flexible pipe which can be easily drawn into an underground hole without extending and deforming a long corrugated flexible pipe. To do.
【0006】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明は、波形可撓パイプの長さ方向に間隔をおいて
両側部に溝を有するクランプを取付け、その間隔に見合
う間隔で突起を有する一対の牽引ワイヤを上記溝にそれ
ぞれ挿入し、該牽引ワイヤにより突起をクランプの両側
部後端に係合させてクランプを牽引し、上記パイプを地
中穴に引込むことを特徴としている。In order to achieve the above object, the present invention is to mount clamps having grooves on both sides at intervals in the lengthwise direction of a corrugated flexible pipe and to project at intervals corresponding to the intervals. A pair of pulling wires each having the above are inserted into the groove, and the pulling wires engage the projections with the rear ends of both sides of the clamp to pull the clamp, and the pipe is drawn into the underground hole.
【0007】[0007]
【作用】牽引ワイヤを引っ張ると、牽引ワイヤ上の突起
がクランプの両側部後端にそれぞれ係合し、波形可撓パ
イプはその長さ方向に間隔をおいて取付けられたクラン
プ毎に牽引されるようになるため、伸び変形せずに地中
穴に容易に引入れられることになる。When the pulling wire is pulled, the projections on the pulling wire engage with the rear ends of both sides of the clamp, and the corrugated flexible pipe is pulled by the clamps attached at intervals in the lengthwise direction. As a result, it can be easily inserted into the underground hole without being stretched and deformed.
【0008】[0008]
【実施例】以下、本発明の一実施例を添付図面に基づい
て詳述する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
【0009】図1において、1は地中ケーブルの布設に
使用されるポリエチレン等からなる波形可撓パイプ(以
下単にパイプともいう)で、このパイプ1上には図5に
示すように長さ方向に間隔を隔ててクランプ2が取付け
られている。このクランプ2は中央にパイプ保持部3
を、両側部に支持翼4,4を有する2つ割りのクランプ
片2a,2bからなり、両クランプ片2a,2bは支持
翼4の基部にてボルト5とナット6により締結されてい
る。パイプ保持部3にはパイプ1の表面の波形にフィッ
トする割型ないしテープ巻きなどからなるスペーサ7を
介してパイプ1が保持される。In FIG. 1, reference numeral 1 denotes a corrugated flexible pipe (hereinafter also simply referred to as a pipe) made of polyethylene or the like used for laying an underground cable. The pipe 1 has a lengthwise direction as shown in FIG. A clamp 2 is mounted at a distance. This clamp 2 has a pipe holder 3 at the center.
Is composed of halved clamp pieces 2a and 2b having support wings 4 and 4 on both sides, and both clamp pieces 2a and 2b are fastened by bolts 5 and nuts 6 at the base of the support wings 4. The pipe 1 is held in the pipe holding portion 3 via a spacer 7 formed of a split mold or a tape winding that fits the corrugated surface of the pipe 1.
【0010】支持翼4にはその重ね合せ面において外側
を前後に連通する溝8が形成され、この溝8に牽引ワイ
ヤ(以下単にワイヤともいう)9が挿入されるようにな
る。上記クランプ2の両側部を牽引する一対のワイヤ
9,9には長さ方向に沿って上記クランプ2の取付間隔
sと見合う間隔mで突起10が取付けられ、これらの突
起10がワイヤ9の牽引により各クランプ2の支持翼4
の後端に係合してこれらのクランプ2をそれぞれ押すよ
うになる。従って、パイプ1に張力が作用しないように
するためには突起の取付間隔mがクランプ2の取付間隔
sよりも若干小さいことが望ましい。なお、クランプ2
の取付間隔sは地中穴壁との摩擦によりパイプ自体に無
理な張力が掛からない間隔、例えば5〜20cmが適当
である。A groove 8 is formed on the supporting blade 4 so that the outer surface of the support blade 4 communicates with the outside in the front-rear direction. A pulling wire (hereinafter also simply referred to as a wire) 9 is inserted into the groove 8. Protrusions 10 are attached to the pair of wires 9, 9 for pulling both sides of the clamp 2 along the length direction at an interval m corresponding to the attachment interval s of the clamp 2, and the protrusions 10 pull the wire 9. The support wing 4 of each clamp 2
It comes to engage with the rear end of each of these to push these clamps 2, respectively. Therefore, in order to prevent tension from acting on the pipe 1, it is desirable that the mounting interval m of the protrusions be slightly smaller than the mounting interval s of the clamp 2. The clamp 2
It is appropriate that the mounting interval s is such that undue tension is not applied to the pipe itself due to friction with the underground hole wall, for example, 5 to 20 cm.
【0011】突起10は図4の(a)ないし(b)に示
すようにワイヤ9の外径dよりも大きい外径D1を有
し、中央が角柱状(円柱状でもよい)で両端が丸みを帯
びた円錐状になった紡錘形に形成されている、この突起
10には軸心にワイヤ9を通すための取付溝11が形成
され、この取付溝11にワイヤ9および溝蓋12を挿入
して圧縮等することにより一体化されている。As shown in FIGS. 4 (a) and 4 (b), the protrusion 10 has an outer diameter D1 larger than the outer diameter d of the wire 9, and the center is prismatic (may be cylindrical) and both ends are rounded. An attachment groove 11 for passing the wire 9 is formed on the axis of the protrusion 10, which is formed in the shape of a spindle having a conical shape with an arrow. The wire 9 and the groove lid 12 are inserted into the attachment groove 11. It is integrated by compressing it.
【0012】上記支持翼4の溝8の幅は図3に示すよう
に前端幅d1から後端幅d2に向かって漸次縮小するテ
ーパに形成され、d2<d<d1とすることによりワイ
ヤ9が前端側から外れ易いが、後端側からは外れ難くな
っている。また、溝8の後端側には突起10の外径D1
よりも若干大きい内径D2を有し、突起10の前端部が
係合する係合穴13が形成されている(図2参照)。As shown in FIG. 3, the width of the groove 8 of the supporting blade 4 is tapered so as to gradually decrease from the front end width d1 toward the rear end width d2. By setting d2 <d <d1, the wire 9 is formed. It is easy to come off from the front end side, but hard to come off from the rear end side. Further, the outer diameter D1 of the protrusion 10 is provided on the rear end side of the groove 8.
An engagement hole 13 is formed which has an inner diameter D2 slightly larger than that of the projection 10 and which engages with the front end of the projection 10 (see FIG. 2).
【0013】更に、支持翼4の前端部には図6の(a)
ないし(b)に示すようにワイヤ9を牽引方向(図1に
おいて右方向)とは反対の方向(左方向)Yに引戻すと
きにワイヤ9が溝8から外れる方向Xに突起10の後端
部を外側へ案内する傾斜部14が形成され、こによりワ
イヤ9を回収できるようになっている。Further, the front end portion of the supporting blade 4 is shown in FIG.
As shown in (b) to (b), when the wire 9 is pulled back in the direction (left direction) Y opposite to the pulling direction (right direction in FIG. 1), the rear end of the protrusion 10 in the direction X in which the wire 9 comes out of the groove 8 An inclined portion 14 for guiding the portion to the outside is formed so that the wire 9 can be collected.
【0014】そして、上記パイプ1を予めシールド工法
により形成された地中穴(図示省略)に布設する場合に
は、一対の牽引ワイヤ9,9を各クランプ2の両側部の
溝8,8にそれぞれ挿入し、牽引ワイヤ9,9の先端側
を地中穴に通して引っ張ればよい。すると、牽引ワイヤ
9上の突起10の前端部がクランプ2の両支持翼4後端
の係合穴13にそれぞれ係合し、波形可撓パイプ1はそ
の長さ方向に間隔をおいて取付けられたクランプ2毎に
牽引されるようになるため、伸び変形せずに地中穴に容
易に引入れられることになる。When the pipe 1 is laid in an underground hole (not shown) previously formed by the shield method, a pair of pulling wires 9, 9 are provided in the grooves 8, 8 on both sides of each clamp 2. Each may be inserted, and the leading ends of the pulling wires 9, 9 may be pulled through the underground hole. Then, the front ends of the projections 10 on the pulling wire 9 are engaged with the engaging holes 13 at the rear ends of the support wings 4 of the clamp 2, respectively, and the corrugated flexible pipes 1 are attached at intervals in the longitudinal direction. Further, since each clamp 2 is pulled, it can be easily pulled into the underground hole without being stretched and deformed.
【0015】こうしてパイプ1の布設が終ったなら、ワ
イヤ9を牽引方向とは反対の方向に引戻す。すると、突
起10が係合穴13から離れて後方のクランプ2まで移
動してそのクランプ2の支持翼4前端に当接し、支持翼
4前端の傾斜部14に沿って外側に移動して支持翼14
から外れ、これに伴ってワイヤ9も溝8から外れるの
で、ワイヤ9を回収することができる。When the laying of the pipe 1 is completed in this way, the wire 9 is pulled back in the direction opposite to the pulling direction. Then, the protrusion 10 moves away from the engagement hole 13 to the rear clamp 2, contacts the front end of the support blade 4 of the clamp 2, and moves outward along the inclined portion 14 at the front end of the support blade 4 to move to the support blade. 14
Since the wire 9 also comes off from the groove 8 in association with this, the wire 9 can be recovered.
【0016】なお、上記実施例ではクランプ2の取付間
隔sが一定であるが、図7に示すようにその取付間隔s
は異なっていてもよい。本実施例では、クランプ2の取
付間隔s1 ,s2 ,s3 …が牽引方向に向かって漸次長
くなるように設定され、突起10の取付間隔m1 ,m2
,m3…もクランプ2の取付間隔に対応させて漸次長く
なるように設定されている。従って、パイプ1を布設す
る場合にはクランプ2を同時に牽引することができる
が、ワイヤ9を引戻す場合には取付間隔の短い方向から
順次支持翼4の傾斜部14に当接して外れて行くため、
小さい力でスムーズにワイヤ9を回収することができ
る。In the above embodiment, the mounting interval s of the clamp 2 is constant, but as shown in FIG.
May be different. In this embodiment, the mounting intervals s1, s2, s3 ... Of the clamp 2 are set to be gradually longer in the pulling direction, and the mounting intervals m1 and m2 of the protrusion 10 are set.
, M3 ... are also set so as to gradually increase in correspondence with the mounting interval of the clamp 2. Therefore, when the pipe 1 is laid, the clamp 2 can be pulled at the same time, but when the wire 9 is pulled back, the clamp 2 is sequentially abutted against the inclined portion 14 of the supporting blade 4 from a direction with a short attachment interval and then detached. For,
The wire 9 can be smoothly recovered with a small force.
【0017】[0017]
【発明の効果】以上要するに本発明によれば次のような
優れた効果を発揮する。In summary, according to the present invention, the following excellent effects are exhibited.
【0018】(1)波形可撓パイプの長手方向に間隔を
おいて取付けたクランプの両側部の溝に、その間隔と見
合った間隔で突起を有する一対の牽引ワイヤをそれぞれ
挿入し、これら牽引ワイヤにより突起をクランプの両側
部後端に係合させてこれを牽引するようにしたので、長
尺の波形可撓パイプを伸び変形させずに地中穴に容易に
引入れて布設することができる。(1) A pair of pulling wires having protrusions are inserted into the grooves on both sides of the clamp, which are attached at intervals in the longitudinal direction of the corrugated flexible pipe, at intervals corresponding to the intervals. Since the projections are engaged with the rear ends of both sides of the clamp and pulled, the long corrugated flexible pipe can be easily inserted into the underground hole and laid without being stretched and deformed. ..
【0019】(2)クランプの両側部前端にワイヤを牽
引方向とは反対の方向に引戻したときにワイヤが溝から
外れる方向に突起を案内する傾斜面を形成しておけば、
ワイヤを回収することが可能となり、それを繰返し使用
できて経済的である。(2) If inclined surfaces are formed at the front ends of both sides of the clamp to guide the protrusions in the direction in which the wire comes out of the groove when the wire is pulled back in the direction opposite to the pulling direction,
It is possible to collect the wire and it can be used repeatedly, which is economical.
【図1】本発明の一実施例を示す平面図である。FIG. 1 is a plan view showing an embodiment of the present invention.
【図2】図1に示したクランプの後面図である。FIG. 2 is a rear view of the clamp shown in FIG.
【図3】同クランプの側面面である。FIG. 3 is a side surface of the clamp.
【図4】牽引ワイヤを示し、(a)は側面図、(b)は
断面図である。FIG. 4 shows a pulling wire, (a) is a side view and (b) is a cross-sectional view.
【図5】波形可撓パイプの布設工法を概略的に示す図で
ある。FIG. 5 is a diagram schematically showing a method of laying a corrugated flexible pipe.
【図6】牽引ワイヤを回収する際の突起の動きを示す図
である。FIG. 6 is a view showing the movement of the protrusion when the tow wire is collected.
【図7】クランプの取付間隔を異ならせた場合の実施例
を示す図である。FIG. 7 is a diagram showing an example in which the mounting intervals of the clamps are different.
【図8】波形可撓パイプの縦断面図である。FIG. 8 is a vertical cross-sectional view of a corrugated flexible pipe.
【図9】波形可撓パイプの変形状態を示し、(a)は縦
断面図、(b)は横断面図である。9A and 9B show a deformed state of a corrugated flexible pipe, FIG. 9A is a vertical sectional view, and FIG. 9B is a horizontal sectional view.
1 波形可撓パイプ 2 クランプ 8 溝 9 牽引ワイヤ 10 突起 1 Corrugated flexible pipe 2 Clamp 8 Groove 9 Traction wire 10 Protrusion
Claims (4)
て両側部に溝を有するクランプを取付け、その間隔に見
合う間隔で突起を有する一対の牽引ワイヤを上記溝にそ
れぞれ挿入し、該牽引ワイヤにより突起をクランプの両
側部後端に係合させてクランプを牽引し、上記パイプを
地中穴に引込むことを特徴とする波形可撓パイプの布設
工法。1. A clamp having grooves on both sides of the corrugated flexible pipe at intervals in the lengthwise direction is attached, and a pair of pulling wires having protrusions at intervals corresponding to the intervals are inserted into the grooves, respectively. A method for laying a corrugated flexible pipe, characterized in that the projection is engaged with the rear ends of both sides of the clamp by a pulling wire to pull the clamp and pull the pipe into the underground hole.
間隔よりも若干小さいことを特徴とする請求項1に記載
の波形可撓パイプの布設方法。2. The method of laying a corrugated flexible pipe according to claim 1, wherein the mounting intervals of the protrusions are slightly smaller than the mounting intervals of the clamps.
牽引方向とは反対の方向に引戻すときにワイヤが溝から
外れる方向に突起を案内する傾斜部を有していることを
特徴とする請求項1または2に記載の波形可撓パイプの
布設方法。3. The front end of both sides of the clamp has an inclined portion that guides the protrusion in a direction in which the wire comes out of the groove when the wire is pulled back in the direction opposite to the pulling direction. The method for laying the corrugated flexible pipe according to claim 1 or 2.
なっていることを特徴とする請求項1、2または3に記
載の波形可撓パイプの布設方法。4. The method of laying a corrugated flexible pipe according to claim 1, 2 or 3, wherein the clamps have different mounting intervals.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28796191A JP2894046B2 (en) | 1991-11-01 | 1991-11-01 | Corrugated flexible pipe laying method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28796191A JP2894046B2 (en) | 1991-11-01 | 1991-11-01 | Corrugated flexible pipe laying method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05126280A true JPH05126280A (en) | 1993-05-21 |
JP2894046B2 JP2894046B2 (en) | 1999-05-24 |
Family
ID=17723992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP28796191A Expired - Lifetime JP2894046B2 (en) | 1991-11-01 | 1991-11-01 | Corrugated flexible pipe laying method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2894046B2 (en) |
-
1991
- 1991-11-01 JP JP28796191A patent/JP2894046B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2894046B2 (en) | 1999-05-24 |
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