JPH0354222B2 - - Google Patents
Info
- Publication number
- JPH0354222B2 JPH0354222B2 JP57176992A JP17699282A JPH0354222B2 JP H0354222 B2 JPH0354222 B2 JP H0354222B2 JP 57176992 A JP57176992 A JP 57176992A JP 17699282 A JP17699282 A JP 17699282A JP H0354222 B2 JPH0354222 B2 JP H0354222B2
- Authority
- JP
- Japan
- Prior art keywords
- sand
- pipe
- water jet
- water
- ejector unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000004576 sand Substances 0.000 claims description 25
- 230000004888 barrier function Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
- E02F5/10—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables
- E02F5/104—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables for burying conduits or cables in trenches under water
- E02F5/107—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables for burying conduits or cables in trenches under water using blowing-effect devices, e.g. jets
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
- E02F5/10—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables
- E02F5/104—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables for burying conduits or cables in trenches under water
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
Description
【発明の詳細な説明】
本発明は海底面下に鋼管を敷設する時に使用す
るウオーターエゼクターユニツトの改良に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in water ejector units used when laying steel pipes under the seabed.
従来海底に鋼管を敷設する場合単に鋼管を海底
面に敷設しただけでは波浪や潮流あるいは附近を
航行する船舶の投錨等によつて破損を受ける結果
となる。そこで海底下に鋼管を埋設するユニツト
浚渫法が採用されている。該工法はパイプを海底
に敷設した後パイプ下の土砂を高圧のウオーター
ジエツトによつて切り崩し、このスラリー化した
土砂を水中撹乱サンドポンプによつて排砂管を介
してパイプラインの両側に排土してパイプを管溝
底に下げる方法である。 Conventionally, when steel pipes are laid on the seabed, simply laying them on the seabed results in damage due to waves, currents, anchoring of ships sailing nearby, etc. Therefore, the unit dredging method is used, which involves burying steel pipes under the seabed. In this construction method, after the pipe is laid on the seabed, the earth and sand under the pipe are broken down using a high-pressure water jet, and this slurry of earth and sand is discharged to both sides of the pipeline via sand discharge pipes using an underwater agitation sand pump. This method involves lowering the pipe to the bottom of the trench.
しかしながら前記工法においてウオーターエゼ
クターユニツトを使用した場合第１にウオーター
ジエツトによつて土砂を切り崩すとき、また切り
崩してスラリー化した土砂を水中撹乱サンドポン
プで排砂管を介してパイプラインの両側に排土の
ときに周囲の水域をこれらの排土で汚染する結果
となり、近年この現象が問題になつている。 However, when a water ejector unit is used in the above construction method, firstly, when the earth and sand is cut down by the water jet, the earth and sand that has been cut down and turned into a slurry is discharged to both sides of the pipeline via the sand discharge pipe by a submersible agitation sand pump. This phenomenon has become a problem in recent years, as it results in the contamination of surrounding water bodies with these waste soils.
本発明者はこれらユニツト浚渫法に使用するウ
オーターエゼクターユニツトの改良について種々
研究を重ねた結果本発明を完成するに至つた。 The present inventor has completed various studies on improving the water ejector unit used in these unit dredging methods, and as a result has completed the present invention.
すなわち従来のウオーターエゼクターユニツト
は第１図に示すようにフレーム台１の両端にスキ
ー２をはかせ、フレーム台１中央部にウオーター
ジエツト管３を設け、このウオータージエツト管
３の両側面にウオーター噴射管４を複数個設け、
そしてウオーター噴出管４の外側にその先端にサ
ンドポンプ５を設けた排砂管６を複数個設けてな
るものである。 That is, in the conventional water ejector unit, as shown in FIG. A plurality of injection pipes 4 are provided,
A plurality of sand discharge pipes 6 each having a sand pump 5 at its tip are provided outside the water jet pipe 4.
本発明はかかるウオーターエゼクターユニツト
において第２図および第３図に示すようにフレー
ム１の上面部および側面部をシート、板状体等の
ドレツジバリア７により覆い、且つ各排砂管６の
先端部に接続したシユーター８を設ける。このシ
ユーター８は排砂管６より口径の大きい管である
ことが好ましい。またシユーター８の排出口９は
下向きにすることが好ましい。 In such a water ejector unit, as shown in FIGS. 2 and 3, the present invention covers the top and side surfaces of the frame 1 with a dredge barrier 7 such as a sheet or plate-like body, and also covers the tip of each sand ejector pipe 6 with a dredge barrier 7. A connected shooter 8 is provided. The shooter 8 is preferably a pipe having a larger diameter than the sand discharge pipe 6. Further, it is preferable that the discharge port 9 of the shooter 8 is directed downward.
次に本発明のウオーターエゼクターユニツトの
使用方法について説明する。まず埋設するパイプ
を両側のウオーター噴出管４の中心に位置せし
め、船上から圧送されてくる水をウオータージエ
ツト管３を通して各ウホーター噴出管４より勢い
良く噴出させ海底部を切り崩す。そして切り崩さ
れた土砂はサンドポンプ５を介して排砂管６によ
つていつたんシユーターに集められシユーターの
排出口９より外部に排出される。 Next, a method of using the water ejector unit of the present invention will be explained. First, the pipe to be buried is positioned at the center of the water jet pipes 4 on both sides, and the water pumped from the ship is forcefully jetted out from each water jet pipe 4 through the water jet pipe 3 to cut down the seabed. Then, the cut earth and sand is collected in a chute by a sand pump 5, a sand discharge pipe 6, and discharged to the outside from a discharge port 9 of the chute.
また一層土砂の拡散防止を行うためにはドレツ
ジバリア７中に船上からパイプ等によつて各種凝
集剤を添加すると良い。 Further, in order to further prevent the diffusion of earth and sand, it is preferable to add various flocculants into the dredge barrier 7 from the ship through a pipe or the like.
本発明のウオーターエゼクターによればウオー
タージエツトの切り崩しによる土砂の舞い上りを
ドレツジバリア７によつて防止し、また排砂管６
による排砂を一旦シユーター８を介して排出する
ので噴出速度が減衰され排出後の汚濁拡散を防止
することができる。 According to the water ejector of the present invention, the drainage barrier 7 prevents earth and sand from flying up due to the water jet being cut down, and the sand discharge pipe 6
Since the discharged sand is once discharged through the shutter 8, the jetting speed is attenuated, and it is possible to prevent pollution from spreading after discharge.
第１図は従来のウオーターエゼクターユニツト
の正面図を示し、第２図は本発明の改良されたウ
オーターエゼクターユニツトの正面図を示し、第
３図は第２図に示すウオーターエゼクターユニツ
トの平面図を示す。
３……ウオータージエツト管、４……ウオータ
ー噴出管、５……サンドポンプ、６……排砂管、
７……ドレツジバリア、８……シユーター、９…
…排出口。
FIG. 1 shows a front view of a conventional water ejector unit, FIG. 2 shows a front view of the improved water ejector unit of the present invention, and FIG. 3 shows a plan view of the water ejector unit shown in FIG. show. 3...Water jet pipe, 4...Water jet pipe, 5...Sand pump, 6...Sand discharge pipe,
7... Dredge barrier, 8... Shooter, 9...
…Vent.
Claims (1)
央部にウオータージエツト管を設け、このウオー
タージエツト管の両側面にウオーター噴出管を複
数個設け、このウオター噴出管の外側のその先端
部にサンドポンプを設けた排砂管を複数個設けた
ウオーターエゼクターユニツトにおいて、前記フ
レームの上部および側面部にドレツジバリアを設
け且つ各排砂管に接続したシユーターを設けたこ
とを特徴とするウオーターエゼクターユニツト。1 Skis are provided at both ends of the frame, a water jet pipe is provided in the center of the frame, a plurality of water jet pipes are provided on both sides of this water jet pipe, and a sand pump is installed at the tip of the water jet pipe outside. 1. A water ejector unit comprising a plurality of sand discharge pipes each provided with a drainage barrier, the water ejector unit comprising a plurality of sand discharge pipes each having a drainage barrier provided on an upper and side surface of the frame, and a shooter connected to each sand discharge pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17699282A JPS5968443A (en) | 1982-10-09 | 1982-10-09 | Water ejector unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17699282A JPS5968443A (en) | 1982-10-09 | 1982-10-09 | Water ejector unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5968443A JPS5968443A (en) | 1984-04-18 |
| JPH0354222B2 true JPH0354222B2 (en) | 1991-08-19 |
Family
ID=16023285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17699282A Granted JPS5968443A (en) | 1982-10-09 | 1982-10-09 | Water ejector unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5968443A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0624436Y2 (en) * | 1987-11-18 | 1994-06-29 | 東燃株式会社 | Underwater excavator for pipelines |
| FR2714919B1 (en) * | 1994-01-07 | 1996-03-29 | Coflexip | Device for filling a trench dug in the seabed to cover a pipe deposited in said trench. |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5550547A (en) * | 1978-10-11 | 1980-04-12 | Hitachi Ltd | Method for manufacturing cap of annular fluorescent lamp |
-
1982
- 1982-10-09 JP JP17699282A patent/JPS5968443A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5550547A (en) * | 1978-10-11 | 1980-04-12 | Hitachi Ltd | Method for manufacturing cap of annular fluorescent lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5968443A (en) | 1984-04-18 |
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