JPH09312924A - Underground cable duct - Google Patents
Underground cable ductInfo
- Publication number
- JPH09312924A JPH09312924A JP12737396A JP12737396A JPH09312924A JP H09312924 A JPH09312924 A JP H09312924A JP 12737396 A JP12737396 A JP 12737396A JP 12737396 A JP12737396 A JP 12737396A JP H09312924 A JPH09312924 A JP H09312924A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- pipe
- resin
- joint portion
- concrete pipe
- 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.)
- Pending
Links
Landscapes
- Electric Cable Installation (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、地中に配した電線
を保護する地中電線管路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground electric wire conduit for protecting an electric wire arranged underground.
【０００２】[0002]
【従来の技術】高度情報通信社会の構築が図られている
今日、その主体的構造物である地中電線管路の構築にあ
たり種々の構造方式が提案されている。例えば、図４の
如く樹脂系の単管１００を多条寄せ集めて配設する単管
路方式や、図３や図５の如く蓮根状に中空部を有するコ
ンクリート製の多孔ブロック１１０を連結して配設する
多孔管方式等がそれである。2. Description of the Related Art Today, with the construction of an advanced information and telecommunications society, various construction methods have been proposed for the construction of underground cable conduits, which are the main structures of the society. For example, as shown in FIG. 4, a single pipe system in which resin-based single pipes 100 are arranged in multiple rows is arranged, or as shown in FIGS. 3 and 5, a concrete porous block 110 having a lotus root-shaped hollow portion is connected. The perforated pipe system and the like are arranged as such.
【０００３】[0003]
【発明が解決しようとする課題】前記従来の方式のう
ち、単管路方式にあっては、気密・水密性や変位追従性
が高いという利点はあるものの、主に樹脂で成形されて
いることもあって強度が不足する場合が多く、車輪荷
重、土圧、地下水圧、地震荷重等の外力に耐え得る強度
をもった管は極めて高価格であるという問題がある。
又、多孔管方式にあっては、コンクリートといった単一
素材をもって構築された中空部に電線を挿通する方式で
あることから、車輪荷重、土圧、地下水圧、地震荷重等
の外力に耐え得る強度は備えているものの、管の長手方
向継手の変位追従性や気密性の保持等において不具合な
面があるなど、選択する工法について個々の短所があ
る。又、いずれの方式にあっても、配設施工時における
掘削範囲が比較的広いために建設価格が高価につくとい
う問題もあった。一本の地中電線管路等に複数の電線管
路管理者が共存するこの種管路等の構築にあたり、挿入
される各種ケーブルの特性を考慮しつつ必要とする要求
品質を共に満足させることは誠に至難である。Among the above-mentioned conventional methods, the single-pipe method has the advantage that it is highly airtight, watertight, and displacement-following, but it is mainly made of resin. Therefore, the strength is often insufficient, and there is a problem that a pipe having a strength capable of withstanding an external force such as wheel load, earth pressure, groundwater pressure, earthquake load is extremely expensive.
Also, in the perforated pipe method, since the electric wire is inserted into the hollow part constructed with a single material such as concrete, the strength that can withstand external forces such as wheel load, earth pressure, groundwater pressure, earthquake load, etc. However, there are individual disadvantages regarding the method of selection, such as the fact that there is a problem with the displacement followability of the longitudinal joint of the pipe and the retention of airtightness. Further, in any of the methods, there is also a problem that the construction cost becomes expensive because the excavation range at the time of installation is relatively wide. When constructing this kind of conduit in which multiple cable conduit managers coexist in one underground conduit, etc., satisfy the required quality while considering the characteristics of various cables to be inserted. Is extremely difficult.
【０００４】本発明は、上記実情に鑑みて成されたもの
であって、様々な外力に耐え得る強度を持ち、不等沈下
や地震による変位への追従性も高く、電線格納部の対外
水密・気密性の高い安価な地中電線管路の提供を目的と
する。The present invention has been made in view of the above circumstances, has strength capable of withstanding various external forces, has high followability to displacement due to unequal subsidence or an earthquake, and is watertight to the outside of the wire storage portion. -The purpose is to provide an inexpensive underground conduit with high airtightness.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
に成された本発明による地中電線管路は、円筒状を呈す
るコンクリート管の中空部に、電線を配した樹脂管を挿
通し、該コンクリート管及び樹脂管を各々の継手部にシ
ール材を介在して連結し、コンクリート管の雌の継手部
の内面側に、相接合するコンクリート管の雄の継手部が
該コンクリート管の長手方向に沿って摺動し得る可動領
域を設けて成ることを特徴とする。The underground electric wire conduit according to the present invention, which was made to solve the above problems, inserts a resin pipe having electric wires into a hollow portion of a concrete pipe having a cylindrical shape, The concrete pipe and the resin pipe are connected to each joint through a sealing material, and a male joint of the concrete pipe to be phase-joined is formed on the inner surface side of the female joint of the concrete pipe in the longitudinal direction of the concrete pipe. It is characterized in that it is provided with a movable region that can slide along.
【０００６】[0006]
【発明の実施の形態】以下、本発明による地中電線管路
の実施の形態を図面に基づき説明する。図１に示す地中
電線管路は、コンクリート管の中空部１２に、電線３０
が通る樹脂管を挿通し、該コンクリート管及び樹脂管を
各々の継手部５０，６０を介して連結したものである。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an underground cable conduit according to the present invention will be described below with reference to the drawings. The underground electric wire conduit shown in FIG. 1 has an electric wire 30 in the hollow portion 12 of the concrete pipe.
Is inserted through the resin pipe, and the concrete pipe and the resin pipe are connected through the joint portions 50 and 60.
【０００７】コンクリート管は、円筒状を呈し、文字通
り外力に耐え得る強度を持ったコンクリートを素材とす
る。コンクリート管同士は、両端の継手部をもって長く
連結されるが、一般的なストレート管１０においては、
シール材７０としてＯリングを固定すべく外周面に定着
部を形成した雄の継手部５２と、相接合する他管１１の
雄の継手部５２を覆うカブリ部８０を設けた雌の継手部
５１が、相反する側の端部にそれぞれ設けられている。The concrete pipe has a cylindrical shape, and is made of concrete having a strength that can literally withstand an external force. Concrete pipes are connected to each other with joints at both ends, but in a general straight pipe 10,
A female joint portion 51 provided with a male joint portion 52 having a fixing portion formed on the outer peripheral surface for fixing an O-ring as the seal member 70 and a fog portion 80 covering the male joint portion 52 of the other pipe 11 to be phase-joined. Are provided at opposite ends.
【０００８】カブリ部８０の内径は、雄の継手部５２の
外形より僅かに大きく設定され、該カブリ部８０の内面
側に、相接合するコンクリート管１１の雄の継手部５２
がコンクリート管１０，１１の長手方向に沿って一定長
摺動し得る可動領域９０が設定されており、該可動領域
９０を確保するに適した侵入量を確認するための標線２
０が雄の継手部５２の外周面に記してある。場合によっ
ては、外力で継手部５０に曲げ変位が生じた際にもに幾
らか追従できるよう、カブリ部８０の内面に、例えばテ
ーパー状の遊び部を形成しても良く、遊び部を形成し更
にシール材７０を一面に定着しておけば不等沈下で継手
部５０に大きな力が加わったとしても、遊び部による逃
げと、シール材７０の弾力性によって継手部５０の破損
を防止することもできる。尚、継手部５０におけるシー
ル材７０として定着するＯリングにはゴム等シール性の
高い頑丈な素材を使用し、相接合するコンクリート管が
外力によって多少ずれたとしてもシール性が確保できる
よう、素材自体の伸縮性を考慮しつつ定常時の厚みが圧
縮時における厚みより十分に大きくなるように形成す
る。The inner diameter of the fog portion 80 is set to be slightly larger than the outer diameter of the male joint portion 52, and the male joint portion 52 of the concrete pipe 11 to be phase-joined to the inner surface side of the fog portion 80.
Has a movable region 90 that can slide for a certain length along the longitudinal direction of the concrete pipes 10 and 11, and a marked line 2 for confirming the amount of invasion suitable for securing the movable region 90.
0 is marked on the outer peripheral surface of the male joint portion 52. In some cases, for example, a tapered play portion may be formed on the inner surface of the fog portion 80 so that the joint portion 50 can be slightly displaced even when the joint portion 50 is bent and displaced. Further, if the sealing material 70 is fixed on one surface, even if a large force is applied to the joint portion 50 due to uneven settlement, the escape due to the play portion and the elasticity of the sealing material 70 prevent the joint portion 50 from being damaged. You can also It should be noted that the O-ring fixed as the sealing material 70 in the joint portion 50 is made of a sturdy material such as rubber having a high sealing property so that the sealing property can be secured even if the concrete pipes to be phase-joined are slightly displaced by an external force. It is formed so that the thickness in a steady state is sufficiently larger than the thickness in compression while taking into account the elasticity of itself.
【０００９】管路が屈曲する箇所においては、コンクリ
ートの曲管を使用してその電線格納部に樹脂管を挿通
し、配設方向の異なるコンクリート管は、コンクリート
製のハンドホール又はボックスカルバート等（以下、ボ
ックス類という。）を介して接続することとなるが、コ
ンクリート製の部材同士を直接接続したのでは、地震等
の強制変位にたいしての適応性に欠けるので、ボックス
類に対しては耐圧・可撓性のある特別仕様の樹脂管を介
して接続することが望ましい。又、相互に最も近接した
ハンドホールやボックスカルバート間に介在するコンク
リート管が比較的短ければ、コンクリート管の中空部の
空隙に樹脂間を容易に増設することができる。At a place where the pipe is bent, a concrete bent pipe is used to insert a resin pipe into the electric wire storage portion, and concrete pipes having different installation directions are made of concrete such as a hand hole or a box culvert. Hereinafter, it will be connected via boxes.) However, if the concrete members are directly connected to each other, the adaptability to forced displacement such as an earthquake is lacking. It is desirable to connect via a flexible and custom resin pipe. Further, if the concrete pipes interposed between the handholes and the box culverts closest to each other are relatively short, it is possible to easily add resin spaces to the voids in the hollow portions of the concrete pipes.
【００１０】コンクリート管内に挿通する樹脂管は円筒
状を呈し、例えば硬質塩化ビニル等の気密・水密性に優
れた樹脂を素材とする。該樹脂管４０もコンクリート管
１０と同様に、雄の継手部６２と雌の継手部６１を相反
する端部に備え、雌の継手部６１には、他管４１の雄の
継手部６２を適当なクリアランスを介して覆うカブリ部
８１が形成されている。この様な樹脂管４０の雌の継手
部６１は、例えばカブリ部８１の内周面に、シール材７
０であるＯリングを装填するための凹部が形成され、相
接合する管４１の雄の継手部６２が当該樹脂管４０にお
ける雌の継手部６１へ嵌合されると、他管４１における
雄の継手部６２の外周面と、当該管４０における雌の継
手部６１の凹部の内周面がＯリングを介して密着し、樹
脂自体の水密・気密性とも相俟って当然に水密・気密性
が確保されることとなる。更に、樹脂管においてもコン
クリート管と同様に可動領域９０を設定しておけば、Ｏ
リングを介した接合部において樹脂管の長手方向への遊
びが生じ、又、樹脂管自体も弾性を持っていることか
ら、地震等の強制変異に対しても継手部６０において極
めて高い適応性を発揮することとなる。尚、コンクリー
ト管に使用するシール材７０及び樹脂管に使用するシー
ル材（図示省略）は、雄の継手部５２，６２の外周面と
カブリ部８０，８１の内周面との間に介在していればよ
く、雄の継手部５２，６２とカブリ部８０，８１のいず
れに定着されていても良い。The resin pipe inserted into the concrete pipe has a cylindrical shape, and is made of a resin having excellent airtightness and watertightness, such as hard vinyl chloride. Like the concrete pipe 10, the resin pipe 40 is also provided with a male joint portion 62 and a female joint portion 61 at opposite ends, and the male joint portion 62 of the other pipe 41 is suitable for the female joint portion 61. A fog portion 81 is formed so as to cover it via a large clearance. The female joint portion 61 of the resin pipe 40 as described above is provided on the inner peripheral surface of the fog portion 81, for example, on the seal member 7.
When a concave portion for loading an O ring of 0 is formed and the male joint portion 62 of the pipe 41 to be phase-joined is fitted to the female joint portion 61 of the resin pipe 40, the male joint portion of the other pipe 41 is fitted. The outer peripheral surface of the joint portion 62 and the inner peripheral surface of the concave portion of the female joint portion 61 of the pipe 40 are in close contact with each other through the O-ring, and together with the watertightness and airtightness of the resin itself, the watertightness and airtightness are naturally obtained. Will be secured. Furthermore, if the movable region 90 is set in the resin pipe as well as the concrete pipe,
Play in the longitudinal direction of the resin pipe occurs at the joint through the ring, and since the resin pipe itself also has elasticity, the joint portion 60 is extremely adaptable to forced mutation such as an earthquake. It will be demonstrated. The sealing material 70 used for the concrete pipe and the sealing material (not shown) used for the resin pipe are interposed between the outer peripheral surfaces of the male joint portions 52 and 62 and the inner peripheral surfaces of the fog portions 80 and 81. It may be fixed on either of the male joint parts 52 and 62 and the fog parts 80 and 81.
【００１１】コンクリート管には、複数の樹脂管が番線
や他の結束材で緩く束ねた状態で挿通され、断面的に見
るとコンクリート管の中空部１２内で樹脂管が大小織り
混ぜて乱積み状態となる。樹脂系管を乱積み状態とする
ことでコンクリート管の断面積を合目的的に最小とする
ことができ、コンクリート管の継手部５０に樹脂管の結
束部を多少ずれることができる程度に固定しておけば、
樹脂管の電線格納部へ電線３０を挿入する際のともづれ
（ここでは、電線３０と樹脂管内面との摩擦により当該
樹脂管が電線３０に追従し、更にその樹脂管の外周面と
接する他の樹脂管がそれに追従し、コンクリート管の中
空部１２においてずれ動く様を指す。）が防止できるの
みならず、地震等の強制変位が生じた際にも、緩めに束
ねられた樹脂管が他の樹脂管に対してスリップし、樹脂
管を破損する力を逃すことができる。又、管路が屈曲す
る箇所については、樹脂管へ電線３０を挿入する際、特
に樹脂管へ大きな負荷がかかるので、樹脂管をコンクリ
ート管の中空部１２にセメントモルタルで固着すること
で樹脂管の圧潰とともずれを防止する。以上は、主要部
材のコンクリート管と樹脂系管の使用を特定したもの
で、その他の施工上の細部は、一例を示したに過ぎず例
示に限定されるものではない。A plurality of resin pipes are inserted into the concrete pipe in a state that they are loosely bundled with a tie wire or other binding material, and when viewed in cross section, the resin pipes are mixed and piled up in a hollow portion 12 of the concrete pipe. It becomes a state. By making the resin-based pipes in a piled state, the cross-sectional area of the concrete pipe can be purposely minimized, and the binding part of the resin pipe can be fixed to the joint portion 50 of the concrete pipe to such an extent that it can be slightly displaced. If you keep it
Tangle when inserting the electric wire 30 into the electric wire storage portion of the resin pipe (here, the resin pipe follows the electric wire 30 due to the friction between the electric wire 30 and the inner surface of the resin pipe, and further contacts the outer peripheral surface of the resin pipe. The resin pipe of No. 1 follows that and moves in the hollow portion 12 of the concrete pipe.), And when the forced displacement such as an earthquake occurs, the loosely bundled resin pipe is The force that slips on the resin pipe and damages the resin pipe can be released. In addition, when the electric wire 30 is inserted into the resin pipe, a large load is applied to the resin pipe at a portion where the pipe is bent. Therefore, the resin pipe is fixed to the hollow portion 12 of the concrete pipe by cement mortar. Prevents displacement with crushing. The above has specified the use of concrete pipes and resin pipes as main members, and other details of construction are merely examples and are not limited to the examples.
【００１２】本発明は以上の如く構成され、所望の広さ
の中空部をもったコンクリート管の埋設工事と同時に樹
脂管を挿通し、コンクリート管及び樹脂管を、コンクリ
ート等の固着材を用いることなく順次連結し、一定長の
埋設工事の後に、高圧電線、或いは通信回線等を樹脂管
の電線格納部に挿通する。一本のコンクリート管の大き
な中空部１２へ乱積みされた樹脂管が電線３０を抱き込
んでコンパクトに纏まる結果、その外形が円筒状である
ことも加わって掘削範囲が極めて小さくなり、掘削・埋
戻等の土木工事の規模が縮小され、電線３０の分岐に際
してもコンクリートの異形管を使用して容易に対応する
ことができる。The present invention is constructed as described above, and at the same time as the burying work of a concrete pipe having a hollow portion of a desired size, the resin pipe is inserted and the concrete pipe and the resin pipe are fixed with a fixing material such as concrete. Instead, connect them one after another, and after a certain length of burying work, insert a high-voltage electric wire or a communication line into the electric wire storage part of the resin pipe. As a result of the resin pipes that are randomly stacked in the large hollow portion 12 of one concrete pipe hugging the electric wires 30 to be compactly packed, the outer shape is also cylindrical and the excavation range is extremely small, so that the excavation / burial The scale of civil works such as returning can be reduced, and even when the electric wire 30 is branched, it can be easily dealt with by using a concrete deformed pipe.
【００１３】[0013]
【発明の効果】以上の如く本発明による地中電線管路を
使用すれば、コンクリート管が車輪荷重、土圧、地下水
圧、地震荷重等の外力から樹脂管を保護し、コンクリー
ト管内へ浸透した水に対しても樹脂管自体と継手部に装
着されたシール材とで電線格納部内における対外水密・
気密性を確保することができる。又、不等沈下や地震に
よる変位に対しても、電線ケーブル類は、コンクリート
管とケーシングで二重に保護され、コンクリート管の継
手部におけるずれから派生するエッジ効果でケーブルが
損傷するといった懸念も排除できる。而して、本発明に
よる地中電線管路は、地震などの外力に対しても極めて
安定した電力や情報の供給が実現でき、掘削・埋戻等の
土木工事費用を削減することもできるので、今後におけ
る高度情報通信社会の構築に大きく寄与するものであ
る。As described above, when the underground electric wire conduit according to the present invention is used, the concrete pipe protects the resin pipe from external forces such as wheel load, earth pressure, groundwater pressure, earthquake load, and penetrates into the concrete pipe. Even with respect to water, the resin pipe itself and the sealing material attached to the joint will prevent water-tightness in the electric wire storage area from outside.
Airtightness can be secured. In addition, there is a concern that electric cables will be doubly protected by concrete pipes and casings against unequal settlements and displacements due to earthquakes, and the cables will be damaged by the edge effect derived from the displacement at the joints of concrete pipes. Can be eliminated. Thus, the underground electric wire pipeline according to the present invention can realize extremely stable supply of electric power and information even against an external force such as an earthquake, and can also reduce the cost of civil works such as excavation and backfill. , It will greatly contribute to the construction of advanced information and communication society in the future.
【図１】本発明による地中電線管路の一例を示す縦断面
図である。FIG. 1 is a vertical sectional view showing an example of an underground electric wire conduit according to the present invention.
【図２】本発明による地中電線管路の一例を示す横断面
図である。FIG. 2 is a cross-sectional view showing an example of an underground electric wire conduit according to the present invention.
【図３】従来の地中電線管路の一例を示す横断面図であ
る。FIG. 3 is a cross-sectional view showing an example of a conventional underground cable conduit.
【図４】従来の地中電線管路の一例を示す横断面図であ
る。FIG. 4 is a cross-sectional view showing an example of a conventional underground electric wire conduit.
【図５】従来の地中電線管路の一例を示す横断面図であ
る。FIG. 5 is a cross-sectional view showing an example of a conventional underground electric wire conduit.
１２ 中空部 ３０ 電線 ５０ 継手部 ５１ 雌の継手部 ５２ 雄の継手部 ６０ 継手部 ７０ シール材 ９０ 可動領域 12 hollow part 30 electric wire 50 joint part 51 female joint part 52 male joint part 60 joint part 70 sealing material 90 movable region
Claims (1)
（１２）に、電線（３０）を配した難燃性の樹脂管を断
面的に乱積み状態で複数本挿通し、コンクリート管及び
樹脂管を、各々の継手部（５０，６０）にシール材（７
０）を介在して連結し、コンクリート管の雌の継手部
（５１）の内面側に、相接合するコンクリート管の雄の
継手部（５２）が該コンクリート管の長手方向に沿って
摺動し得る可動領域（９０）を設けて成ることを特徴と
する地中電線管路。1. A concrete pipe and a resin pipe, wherein a plurality of flame-retardant resin pipes having electric wires (30) are inserted in a hollow state (12) of a cylindrical concrete pipe in a piled state in a cross section. Sealant (7) on each joint (50, 60).
0) intervenes, and the male joint portion (52) of the concrete pipe to be phase-joined slides on the inner surface side of the female joint portion (51) of the concrete pipe along the longitudinal direction of the concrete pipe. An underground cable conduit characterized by being provided with a movable region (90) for obtaining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12737396A JPH09312924A (en) | 1996-05-22 | 1996-05-22 | Underground cable duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12737396A JPH09312924A (en) | 1996-05-22 | 1996-05-22 | Underground cable duct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09312924A true JPH09312924A (en) | 1997-12-02 |
Family
ID=14958383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12737396A Pending JPH09312924A (en) | 1996-05-22 | 1996-05-22 | Underground cable duct |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09312924A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007049847A (en) * | 2005-08-11 | 2007-02-22 | Aron Kasei Co Ltd | Structure of connection between handhole and cable protecting tube, pipe joint set, and short pipe for pipe joint connection |
| KR101637507B1 (en) * | 2015-12-11 | 2016-07-07 | 대실테크 주식회사 | River crossing buried pipeline construction and pipeline laying method using the same |
| CN106602495A (en) * | 2017-03-07 | 2017-04-26 | 辽宁工程技术大学 | Flame-retardant safe threading pipe for coal mine |
| CN106848956A (en) * | 2017-03-07 | 2017-06-13 | 辽宁工程技术大学 | A kind of electric wire tube bank of resistance to chemical industry corrosion |
| CN114421407A (en) * | 2022-01-18 | 2022-04-29 | 梁创 | Overhead insulated cable |
-
1996
- 1996-05-22 JP JP12737396A patent/JPH09312924A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007049847A (en) * | 2005-08-11 | 2007-02-22 | Aron Kasei Co Ltd | Structure of connection between handhole and cable protecting tube, pipe joint set, and short pipe for pipe joint connection |
| KR101637507B1 (en) * | 2015-12-11 | 2016-07-07 | 대실테크 주식회사 | River crossing buried pipeline construction and pipeline laying method using the same |
| CN106602495A (en) * | 2017-03-07 | 2017-04-26 | 辽宁工程技术大学 | Flame-retardant safe threading pipe for coal mine |
| CN106848956A (en) * | 2017-03-07 | 2017-06-13 | 辽宁工程技术大学 | A kind of electric wire tube bank of resistance to chemical industry corrosion |
| CN114421407A (en) * | 2022-01-18 | 2022-04-29 | 梁创 | Overhead insulated cable |
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