JP2869462B2 - Optical cable laying method - Google Patents
Optical cable laying methodInfo
- Publication number
- JP2869462B2 JP2869462B2 JP2465689A JP2465689A JP2869462B2 JP 2869462 B2 JP2869462 B2 JP 2869462B2 JP 2465689 A JP2465689 A JP 2465689A JP 2465689 A JP2465689 A JP 2465689A JP 2869462 B2 JP2869462 B2 JP 2869462B2
- Authority
- JP
- Japan
- Prior art keywords
- optical cable
- sewer pipe
- cable
- pipe
- wall
- 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
- 230000003287 optical effect Effects 0.000 title claims description 53
- 238000000034 method Methods 0.000 title claims description 13
- 230000001681 protective effect Effects 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000010865 sewage Substances 0.000 description 10
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000003517 fume Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
- G02B6/508—Fixation devices in ducts for drawing cables
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Electric Cable Installation (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ヒューム管からなる下水管中に光ファイバ
ケーブルを配設するための光ケーブル布設工法に関す
る。Description: TECHNICAL FIELD The present invention relates to an optical cable laying method for laying an optical fiber cable in a sewer pipe composed of a fume pipe.
光ケーブルを都市圏に布設する場合、一般に地下また
は地上にケーブル管路を配設し、その管内にケーブルを
引入れる布設工法が採られている。地下ケーブルの場合
を例にとると、設定した管路区間に応じてマンホールを
設け、マンホールを結ぶ区間に管路を埋設する。そし
て、ケーブル牽引手段により各ケーブルピースを管路内
に引入れている。このような光ケーブルの布設工法で
は、線路を新設する場合、ケーブル管路の配設に多大の
労力と経費を費やさなければならない問題がある。ま
た、都市圏の地下には上・下水道，ガス，電話等の管路
や各種の施設が複雑に存在することから、ケーブル管路
を新たに配設することが著しく困難な状況にある。この
ような状況から、下水管等の既設管路の中に光ケーブル
を配設し、既設管路を光ケーブル管路として兼用するこ
とにより、ケーブル管路を新たに配設することなく光ケ
ーブルを布設することが試みられている。When laying an optical cable in an urban area, a cable laying method is generally employed in which a cable conduit is provided underground or above the ground and a cable is drawn into the pipe. Taking the case of an underground cable as an example, manholes are provided according to the set pipeline sections, and the pipelines are buried in sections connecting the manholes. Each cable piece is drawn into the pipeline by the cable pulling means. In such an optical cable laying method, there is a problem that a great deal of labor and cost must be spent for arranging the cable conduit when newly constructing a track. In addition, since there are complicated pipelines and various facilities for water and sewerage, gas, telephone, etc. underground in the metropolitan area, it is extremely difficult to newly install a cable pipeline. From such a situation, by arranging an optical cable in an existing pipeline such as a sewer pipe and using the existing pipeline as an optical cable pipeline, an optical cable is laid without newly arranging a cable pipeline. Have been tried.
上記は下水管の中に光ケーブルを配設する方法として
は、下水管の上部開口（例えばマンホール）を光ケーブ
ルの引入れ引出し部とし、管路内では光ケーブルを管路
の長さに沿って沈めておくのが簡単な方法である。この
場合、管路の底に沈められている光ケーブルは下水の流
れによる提供を殆ど受けないが、光ケーブルを下水管上
部の引入れ引出し部へ導くためには光ケーブルを屈曲さ
せ立上らせる必要があり、この屈曲部に下水自体の流動
による抵抗や水と共に流れてくるゴミ等が掛かり光ケー
ブルに過度の力が加わることになり、ケーブルを損傷さ
せ、断線の原因となるという問題点があった。The above is a method of arranging an optical cable in a sewer pipe. An upper opening (for example, a manhole) of the sewer pipe is used as a draw-in / draw-out part of the optical cable. This is an easy way to keep it. In this case, the optical cable submerged at the bottom of the pipeline is hardly provided by the flow of sewage, but it is necessary to bend and rise the optical cable in order to guide the optical cable to the draw-in / draw-out section above the sewer pipe. In addition, there is a problem in that resistance due to the flow of the sewage itself and dust and the like flowing along with the water are applied to the bent portion, and excessive force is applied to the optical cable, thereby damaging the cable and causing disconnection.
本発明はこのような問題に対処するために創案された
もので、下水管の内壁に光ケーブルの立上り部分を固定
して下水の流れによる光ケーブルの損傷を防護する光ケ
ーブル布設工法を提供することを目的とする。The present invention has been devised to address such a problem, and an object of the present invention is to provide an optical cable laying method for fixing an upright portion of an optical cable to an inner wall of a sewer pipe and protecting the optical cable from being damaged by a flow of sewage. And
上記の目的を達成するため本発明は、下水管の底部
に、管の長さ方向に沿って光ケーブルを配設する光ケー
ブル布設工法であって、上記下水管の底部と上部との間
に光ケーブルを引入れ引き出すに際し、光ケーブルを下
水管の底部と上部との間で屈曲させ、下水管内壁面に防
護カバーで固定するようにし、この防護カバーは、鉛板
で光ケーブルを覆うようにして水の抵抗を受けにくい形
状に整形すると共に、下水管内壁に水中接着剤で接着、
固定するようにしたことを特徴とするものである。In order to achieve the above object, the present invention provides an optical cable laying method of arranging an optical cable along the length of a pipe at the bottom of the drain, wherein the optical cable is provided between the bottom and the top of the drain. When pulling in and pulling out, the optical cable is bent between the bottom and top of the sewer pipe and fixed to the inner wall surface of the sewer with a protective cover.The protective cover covers the optical cable with a lead plate to reduce water resistance. In addition to shaping it into a shape that is difficult to receive, it is bonded to the inner wall of the sewer pipe with an underwater adhesive,
It is characterized in that it is fixed.
このような光ケーブル布設工法では、光ケーブルの屈
曲部が鉛を用いた防護カバーにより下水管内壁に固定さ
れる。換言すれば、光ケーブルは屈曲部が浮き上がるこ
とがないので、下水自体の流動による抵抗や水と共に流
れてくるゴミ等が掛かることがない。また、防護カバー
は下水の流れによる抵抗を受けにくい形状に変形させる
ことができるので、下水管内壁に対して光ケーブルを固
着させやすくなる。これによって、光ケーブルが下水の
流動による抵抗を受けにくくされると共に、防護カバー
自体も水の抵抗を受けにくくなることでゴミ等が防護カ
バー付近に堆積しにくくすることができる。従って、光
ケーブルは安定した状態で下水管内壁面に固定されるこ
とになる。In such an optical cable laying method, the bent portion of the optical cable is fixed to the inner wall of the sewer pipe by a protective cover using lead. In other words, since the bent portion of the optical cable does not rise, there is no resistance due to the flow of the sewage itself or dust or the like flowing with the water. In addition, since the protective cover can be deformed into a shape that is less likely to receive resistance due to the flow of sewage, it becomes easier to fix the optical cable to the inner wall of the sewage pipe. This makes it difficult for the optical cable to receive the resistance due to the flow of the sewage, and also makes it difficult for the protective cover itself to receive the water resistance, so that dust and the like are hardly deposited near the protective cover. Therefore, the optical cable is fixed to the inner wall surface of the sewer pipe in a stable state.
以下、図面に基づいて本発明の一実施例について説明
する。Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図は下水管の軸方向から見た断面図であり、下水
管２は、ヒューム管と呼ばれる鉄筋コンクリート管で、
直径が2.2〜3m,厚さ10cm程度のものである。光ケーブル
３は防水構造のものが用いられる。この光ケーブル３
は、下水管２の長さ方向に沿う底部に沈めて配設する
が、ケーブルの引入れ引出し部（例えば後述するマンホ
ール）に導く箇所では光ケーブル３を屈曲させる必要が
ある。FIG. 1 is a sectional view of the sewer pipe viewed from the axial direction. The sewer pipe 2 is a reinforced concrete pipe called a fume pipe.
It has a diameter of 2.2 to 3 m and a thickness of about 10 cm. The optical cable 3 has a waterproof structure. This optical cable 3
Is disposed submerged at the bottom along the length of the sewer pipe 2, but it is necessary to bend the optical cable 3 where it leads to a cable lead-in / out section (for example, a manhole described later).
この光ケーブル３の屈曲部を防護カバー１で下水管２
の内壁に固定する。該防護カバー１には鉛板11が用いら
れる。鉛板11は、光ケーブル３を挿通する挿通孔４を有
し、100kg/m程度のものを適度の長さに切断したものが
用いられる。鉛板11を下水管２の内壁に固定する方法
は、鉛板11の下面に例えばパテ剤のような水中接着剤13
を塗布して下水管２の内壁に落とし込む。この水中接着
剤13のみでは固着が不十分と判断される場合は、アンカ
ーボルト12を鉛板11の両端に打ち込む。さらに、光ケー
ブル３の鉛板11への固定は、光ケーブル３の上から挿通
孔４を嵌合するようにして鉛板11を被せ、木ハンマー等
で上方から叩いて水中接着剤13の接着性を高めると共に
鉛板11を変形させて挿通孔４を孔ケーブル３に密着さ
せ、下水管２の内壁に固着させてもよいし、予め鉛板11
を下水管２の内壁に固着させた後に光ケーブル３を挿通
孔４に挿入して鉛板11の上方から叩いて変形させるよう
にしてもよい。The bent portion of the optical cable 3 is covered with the protective cover 1 by the drain pipe 2.
To the inner wall of A lead plate 11 is used for the protective cover 1. The lead plate 11 has an insertion hole 4 through which the optical cable 3 is inserted, and a lead plate 11 of about 100 kg / m cut into an appropriate length is used. A method for fixing the lead plate 11 to the inner wall of the drain pipe 2 is as follows.
And dropped on the inner wall of the sewer pipe 2. When it is determined that the underwater adhesive 13 alone is insufficiently fixed, the anchor bolts 12 are driven into both ends of the lead plate 11. Further, the optical cable 3 is fixed to the lead plate 11 by covering the lead plate 11 so as to fit the insertion hole 4 from above the optical cable 3 and hitting it from above with a wooden hammer or the like to reduce the adhesiveness of the underwater adhesive 13. Alternatively, the lead plate 11 may be deformed so that the insertion hole 4 is brought into close contact with the hole cable 3 and fixed to the inner wall of the sewer pipe 2.
After being fixed to the inner wall of the sewer pipe 2, the optical cable 3 may be inserted into the insertion hole 4 and hit from above the lead plate 11 to be deformed.
第２図は下水管２の上方から見た断面図であり、光ケ
ーブル３の屈曲部を下水管２の内壁面に固定した状態を
示している。防護カバー１は長さ50cm程度の鉛板11ブロ
ックを複数個並べて使用しているが、これらのブロック
を一体にしたものを使用することも可能である。そし
て、光ケーブル３は、第３図に示すようにマンホール５
内に設けたカプラ６まで延出し、光ケーブル３の引入れ
引出し部とするのである。なお、この布設工法は、実施
例の既設下水管に限らず新設の下水管にも同様に施工で
き、また、光ケーブルの下水管底部からの立上りは、マ
ンホールに限らず下水管の上部に適宜設けた外部取出し
孔から管外と連通するようにしてもよい。FIG. 2 is a cross-sectional view of the sewer pipe 2 as viewed from above, and shows a state where the bent portion of the optical cable 3 is fixed to the inner wall surface of the sewer pipe 2. Although the protective cover 1 is composed of a plurality of 11 blocks of lead plates each having a length of about 50 cm, it is also possible to use an integrated unit of these blocks. The optical cable 3 is connected to the manhole 5 as shown in FIG.
The optical cable 3 extends to the coupler 6 provided therein. In addition, this laying method can be applied not only to the existing sewer pipe of the embodiment but also to a new sewer pipe, and the rising from the bottom of the sewer pipe of the optical cable is appropriately provided not only at the manhole but also at the upper part of the sewer pipe. Alternatively, the outside extraction hole may communicate with the outside of the tube.
以上説明したように本発明の光ケーブル布設工法によ
れば、下水管を光ケーブル管路として用いるので、ケー
ブル管路を新設する必要がなく費用および労力を著しく
削減できる。また、下水管底部と上部との間の光ケーブ
ルの屈曲部が下水管内壁に比重の重い鉛板で固定される
ので、下水の流れによる圧力に対する抵抗力を鉛によっ
て持たせて下水の流れに対して略不動の状態を維持でき
ることで光ケーブルを防護でき、さらに、下水の流れに
より下水道内壁から鉛板が浮き上がることも阻止できる
ので、下水道内壁から浮き上がって、いわゆる剥離され
ないことによって下水中のゴミ等が光ケーブルに掛かる
ことも少なくできる。さらに、防護カバーは、下水の流
れによる抵抗を受けにくい形状に変形させることができ
るので、下水管内壁面に対する光ケーブルの固着性を向
上させるとともに、水の抵抗が大きくなる場合のような
ゴミの堆積をなくして光ケーブルの損傷や断線の原因を
なくすことが可能になる。さらにまた、この施工法は簡
単であり、既設の下水管はもとより、新設の下水管にも
施工が容易であり、光ケーブル布設工事を安価に実施で
きる。As described above, according to the optical cable laying method of the present invention, since the sewer pipe is used as the optical cable conduit, there is no need to newly install a cable conduit, and the cost and labor can be significantly reduced. In addition, since the bent portion of the optical cable between the bottom and top of the sewer pipe is fixed to the inner wall of the sewer pipe with a lead plate having a high specific gravity, the lead has a resistance to the pressure due to the flow of sewage to the sewage flow. The optical cable can be protected by maintaining an almost immobile state, and furthermore, the lead plate can be prevented from rising from the inner wall of the sewer due to the flow of the sewer. It is also possible to reduce the possibility of hanging on an optical cable. Furthermore, the protective cover can be deformed into a shape that is less susceptible to resistance due to the flow of sewage, thereby improving the adhesion of the optical cable to the inner wall surface of the sewer pipe and reducing the accumulation of dust as in the case where the resistance of water increases. It is possible to eliminate the cause of the damage and disconnection of the optical cable. Furthermore, this construction method is simple, the construction is easy not only for the existing sewer pipe, but also for the new sewer pipe, and the optical cable laying work can be performed at low cost.
第１図および第２図は本発明の一実施工法を示し、第１
図は下水管の軸方向からみた断面図、第２図は下水管の
上方からみた断面図、第３図は施工状態全体の側断面図
である。 １……防護カバー、11……鉛板、12……アンカーボル
ト、13……水中接着剤、２……下水管、３……光ケーブ
ル、４……挿通孔、５……マンホール、６……カプラ。FIGS. 1 and 2 show an embodiment of the present invention.
The figure is a sectional view of the sewer pipe viewed from the axial direction, FIG. 2 is a sectional view of the sewer pipe viewed from above, and FIG. 3 is a side sectional view of the entire construction state. DESCRIPTION OF SYMBOLS 1 ... Protective cover, 11 ... Lead plate, 12 ... Anchor bolt, 13 ... Underwater adhesive, 2 ... Drain pipe, 3 ... Optical cable, 4 ... Insertion hole, 5 ... Manhole, 6 ... Coupler.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G02B 6/46 G02B 6/44 H02G 1/08 H02G 9/06 H02G 1/06 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) G02B 6/46 G02B 6/44 H02G 1/08 H02G 9/06 H02G 1/06
Claims (1)
ケーブルを配設する光ケーブル布設工法であって、 上記下水管の底部と上部との間に光ケーブルを引入れ引
き出すに際し、光ケーブルを下水管の底部と上部との間
で屈曲させ、下水管内壁面に防護カバーで固定するよう
にし、 この防護カバーは、鉛板で光ケーブルを覆うようにして
水の抵抗を受けにくい形状に形成すると共に、下水管内
壁に水中接着剤で接着、固定するようにしたことを特徴
とする光ケーブル布設工法。An optical cable laying method for arranging an optical cable at a bottom of a sewer pipe along a length direction of the pipe, wherein the optical cable is inserted between a bottom part and an upper part of the sewer pipe. Is bent between the bottom and the top of the sewer pipe, and secured to the inner wall of the sewer pipe with a protective cover. This protective cover is formed to cover the optical cable with a lead plate and to be less resistant to water resistance. A method for laying an optical cable, wherein an underwater adhesive is used for bonding and fixing to an inner wall of a sewer pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2465689A JP2869462B2 (en) | 1989-02-01 | 1989-02-01 | Optical cable laying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2465689A JP2869462B2 (en) | 1989-02-01 | 1989-02-01 | Optical cable laying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02203302A JPH02203302A (en) | 1990-08-13 |
| JP2869462B2 true JP2869462B2 (en) | 1999-03-10 |
Family
ID=12144186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2465689A Expired - Fee Related JP2869462B2 (en) | 1989-02-01 | 1989-02-01 | Optical cable laying method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2869462B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5186761A (en) * | 1987-04-30 | 1993-02-16 | Seiko Epson Corporation | Magnetic alloy and method of production |
| US5460662A (en) * | 1987-04-30 | 1995-10-24 | Seiko Epson Corporation | Permanent magnet and method of production |
| EP0288637B1 (en) * | 1987-04-30 | 1994-08-10 | Seiko Epson Corporation | Permanent magnet and method of making the same |
| EP0942504A1 (en) * | 1998-03-12 | 1999-09-15 | Siemens Aktiengesellschaft | Methode for fastening cables in ducts or tubesystems |
| DE10035267B4 (en) * | 2000-07-20 | 2007-09-06 | CCS Technology, Inc., Wilmington | Optical cable and duct or pipe system with an installed optical cable |
| GB0814665D0 (en) | 2008-08-12 | 2008-09-17 | Thomas Elfed | Laying network cables in sewers |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62190245A (en) * | 1986-02-17 | 1987-08-20 | Japan Synthetic Rubber Co Ltd | Rubber composition |
-
1989
- 1989-02-01 JP JP2465689A patent/JP2869462B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02203302A (en) | 1990-08-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |