JP3388385B2 - Method and apparatus for filling underwater pipes below pipe - Google Patents
Method and apparatus for filling underwater pipes below pipeInfo
- Publication number
- JP3388385B2 JP3388385B2 JP29799298A JP29799298A JP3388385B2 JP 3388385 B2 JP3388385 B2 JP 3388385B2 JP 29799298 A JP29799298 A JP 29799298A JP 29799298 A JP29799298 A JP 29799298A JP 3388385 B2 JP3388385 B2 JP 3388385B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- slurry
- water bottom
- water
- laying
- 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
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- Underground Or Underwater Handling Of Building Materials (AREA)
- Sewage (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば火力発電所
の冷却水給排水路用等として海底に布設する水底布設管
体の布設方法及びその装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for laying a water bottom laying pipe body laid on the sea floor for use as, for example, a cooling water supply / drainage channel in a thermal power plant.
【０００２】[0002]
【従来の技術】従来、この種の管体の水底布設に際して
は、布設位置の海底に浚渫船等を使用して凹溝を掘削形
成し、必要な地盤処理を施した後、枕木状等の支持材を
介して溝底面から間隔を隔てて水底布設管体を設置し、
然る後、凹溝を埋め戻し材をもって埋め、水底に管体を
埋設している。2. Description of the Related Art Conventionally, when laying the bottom of a pipe of this type, a trench is excavated and formed on the seabed at the laying position using a dredger, etc., and after the necessary ground treatment, support for sleepers, etc. Install the water bottom laying pipe at a distance from the bottom of the groove through the material,
After that, the groove is filled with a backfill material, and the pipe body is buried in the water bottom.
【０００３】[0003]
【発明が解決しようとする課題】このような従来の布設
方法では、水面上より埋め戻し材を投下し、管体を設置
した溝を埋めるものであるため、埋め戻し材の積み上げ
時の安息角が大きい場合には、水面上からの投下のみで
は、図７に示すように管体両側から投下された埋め戻し
材の表面と管体底面との間に隙間ができ、管体下への充
分な充填ができないという問題があった。In such a conventional laying method, the backfill material is dropped from above the water surface to fill the groove in which the pipe body is installed. Therefore, the repose angle at the time of stacking the backfill material If it is large, only by dropping from above the water surface, as shown in FIG. 7, there is a gap between the surface of the backfill material dropped from both sides of the pipe and the bottom face of the pipe, and it is not possible to lower the pipe sufficiently. There was a problem that it could not be filled correctly.
【０００４】このため、従来は、管体布設用の凹溝の底
面と設置される管体の底面との間隔を大きく取り、埋め
戻し材が管体下に入り込み易くする必要が生じ、そのた
めに水底に掘削する凹溝を深いものとする必要が生じ、
その掘削及び埋め戻しのための経費が大きくなるという
問題があった。For this reason, conventionally, it is necessary to make a large gap between the bottom surface of the groove for laying the pipe body and the bottom surface of the pipe body to be installed so that the backfill material can easily enter under the pipe body. It is necessary to make the groove to be excavated on the bottom of the water deep,
There was a problem that the cost for excavation and backfilling would be large.
【０００５】しかし、それでも完全な管体下への充填が
期待できないため、従来は管体下の埋め戻し材による管
体の支持を期待せずに、管体の肉圧を大きくして管強度
を高めており、このため管体の製造コストが大きいもの
となるという問題があった。However, since it cannot be expected to completely fill the pipe under the pipe, conventionally, it is not expected to support the pipe by the backfill material under the pipe, and the wall pressure of the pipe is increased to increase the pipe strength. Therefore, there is a problem that the manufacturing cost of the pipe body becomes large.
【０００６】本発明は、このような従来の問題に鑑み、
布設管体下の隙間を大きくとらなくても完全な隙間充填
ができ、管体布設用の深い凹溝を必要とせず、しかも、
埋め戻し材にて管体の荷重を受けることができ、管体の
肉圧を薄いものとできる水底布設管体の管下充填方法及
びその装置を提供することにある。The present invention has been made in view of such conventional problems.
Complete gap filling can be done without taking a large gap under the laying pipe body, no deep groove for pipe laying is required, and moreover,
It is an object of the present invention to provide a method and apparatus for filling a bottom of a water-bottom laid pipe under a pipe, which can receive a load of the pipe with a backfill material and can reduce the wall pressure of the pipe.
【０００７】[0007]
【課題を解決するための手段】上述の如き従来の問題を
解決し、所期の目的を達成するための本発明方法の特徴
は、水底に掘削形成した管布設用凹溝内に、該凹溝底面
から間隔を隔てて設置した水底布設管体下の隙間に埋め
戻し材を充填する水底布設管体の管下充填方法におい
て、砕石及び／又は砂等の埋め戻し材を陸上若しくは船
上にて水と混合してスラリーとなし、該スラリーを搬送
管を通して前記水底布設管体の側部に送り、該搬送管の
開口を前記水底布設管体下に向けて前記スラリーを噴射
させることにより前記埋め戻し材を水底布設管体下に充
填することにある。The features of the method of the present invention for solving the above-mentioned conventional problems and for achieving the intended object are that the recess is formed in a pipe laying groove formed by excavation on the water bottom. In the method of filling the bottom of the water bottom laying pipe with the backfilling material, which is installed at a distance from the bottom of the groove, the backfilling material such as crushed stone and / or sand on land or on board. The slurry is mixed with water to form a slurry, the slurry is sent to a side portion of the water bottom laying pipe through a carrying pipe, and the slurry is jetted toward the bottom of the water laying pipe by opening the opening of the carrying pipe. It is to fill the return material under the water bottom laying pipe.
【０００８】尚、管布設用凹溝内に設置した水底布設管
体の一方の側部の前記凹溝内に埋め戻し材を投入して前
記布設用管体下の隙間の片側を閉鎖し、然る後他方の側
部より前記水底布設管体下の隙間にスラリーを噴射させ
て埋め戻し材を水底布設管体下に充填することが好まし
く、また、埋め戻し材として単粒度砕石及び／又は砂の
使用が好ましい。Incidentally, a backfill material is put into the concave groove on one side of the water bottom laying pipe installed in the pipe laying groove to close one side of the gap under the laying pipe, After that, it is preferable to inject the slurry into the gap below the water bottom laying pipe from the other side to fill the backfill material under the water bottom laying pipe, and as the backfill material, single-grain crushed stone and / or The use of sand is preferred.
【０００９】また、本発明の装置の特徴は、砕石及び／
又は砂等の埋め戻し材を収容し、これに注水してスラリ
ーとする貯留槽と、該貯留槽内のスラリーを搬送管を通
して水底に搬送手段と、該搬送手段の前記搬送管の先端
部に連結され、重りによって水底に設置され、搬送管を
通して送られてくるスラリーを所定の角度で噴射させる
スラリー噴射ノズルとを備えてなる水底布設管体の管下
充填装置に存する。The features of the apparatus of the present invention are that crushed stone and / or
Alternatively, a storage tank that contains a backfill material such as sand, and water is poured into the storage tank to form a slurry, a transfer unit for transferring the slurry in the storage tank to a water bottom through a transfer pipe, and a tip of the transfer pipe of the transfer unit The present invention resides in a sub-bottom filling device for a water bottom laying pipe body, which is connected to the bottom of the water and is installed on the bottom of the water by a weight, and has a slurry injection nozzle for injecting the slurry sent through the transfer pipe at a predetermined angle.
【００１０】[0010]
【発明の実施の形態】次に本発明の実施の形態を図面に
ついて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.
【００１１】図１は、本発明方法の使用する装置を示し
ており、図中１は水底に掘削成形した管布設用凹溝、２
は凹溝１の底部の枕状の支持材３上に設置した水底布設
管体である。FIG. 1 shows an apparatus used in the method of the present invention. In the figure, 1 is a groove for pipe laying, which is formed by excavating and forming on a water bottom.
Is a water bottom laying pipe installed on the pillow-shaped support member 3 at the bottom of the groove 1.
【００１２】この管体２間の隙間ａを埋めるための装置
として、埋め戻し材４を積載する貯留槽５を有する土運
船６とその貯留槽５内の埋め戻し材をスラリー状にして
水底に搬送する搬送手段７と、搬送されてくるスラリー
を管体２下の隙間ａに向けて噴射させるスラリー噴射ノ
ズル８とを有しており、貯留槽では、積載された埋め戻
し材４に、水中ポンプ１０により海水を汲み上げて注水
し、搬送手段７にはサンドポンプ１１と搬送管１２とを
有し、サンドポンプ１１により貯留槽５内の埋め戻し材
４を水とともに吸引し、スラリー状となして搬送管１２
内を移動させるようにしている。As a device for filling the gap a between the pipes 2, a soil carrier 6 having a storage tank 5 for loading the backfill material 4 and the backfill material in the storage tank 5 are made into a slurry to form a water bottom. And a slurry injection nozzle 8 for injecting the conveyed slurry toward the gap a below the pipe body 2. In the storage tank, the loaded backfill material 4 is Seawater is pumped up and injected by the submersible pump 10, and the transport means 7 has a sand pump 11 and a transport pipe 12. The sand pump 11 sucks the backfill material 4 in the storage tank 5 together with water to form a slurry. None carrier tube 12
I try to move inside.
【００１３】スラリー噴射ノズル８は、搬送管１２の下
端に連結され、重り１３により水底の所定位置に保持さ
れるようになっており、そのスラリー噴射口の上下及び
水平方向の角度が所定の角度を維持するように重りに対
して固定されている。The slurry injection nozzle 8 is connected to the lower end of the transfer pipe 12 and is held at a predetermined position on the water bottom by a weight 13. The vertical and horizontal angles of the slurry injection port are predetermined angles. It is fixed against the weight so as to maintain.
【００１４】次に、このように構成される装置を使用し
た管下充填方法について説明する。Next, a pipe filling method using the apparatus thus constructed will be described.
【００１５】図２に示すように水底に掘削形成した凹溝
１内に支持材３を介して管体２を設置した後、まず管体
２の片側側部の凹溝１内にバケット等の通常の投下装置
を使用して埋め戻し材４を投入し、図３に示すように管
体２の下の隙間ａの片側を閉鎖する。このとき埋め戻し
材４は、自らの持つ安息角αで片側より管体２下に入り
込んだ状態となる。As shown in FIG. 2, after the pipe body 2 is installed in the concave groove 1 formed by excavation at the bottom of the water through the support member 3, first, a bucket or the like is formed in the concave groove 1 on one side of the pipe body 2. The backfilling material 4 is put in using a normal dropping device, and one side of the gap a under the pipe body 2 is closed as shown in FIG. At this time, the backfilling material 4 is in a state of entering under the tubular body 2 from one side at the angle of repose α of its own.
【００１６】次いで図４に示すように、管体２の反対側
の側部に搬送管１２を沈め、重り１３を接地させて噴射
ノズル８を管体２下の隙間ａに向け、サンドポンプ１１
を作動させて、埋め戻し材４を水とともに吸引し、スラ
リー状として水底に送り、噴射ノズル８より管体２下に
向けて噴射させ、埋め戻し材４が沈降することにより残
りの隙間ａを埋める。Next, as shown in FIG. 4, the carrier pipe 12 is sunk in the side portion on the opposite side of the pipe body 2, the weight 13 is grounded, and the injection nozzle 8 is directed toward the gap a below the pipe body 2, and the sand pump 11 is provided.
Is actuated to suck the backfill material 4 together with water, send it as a slurry to the bottom of the water, and jet it toward the bottom of the pipe 2 from the jet nozzle 8 to settle the remaining gap a by allowing the backfill material 4 to settle. fill in.
【００１７】このようにして、１位置で管体長さ方向の
５〜６ｍの充填を行った後、噴射ノズル８の位置を管体
２の長手方向に更に５〜６ｍ後退させ、次の充填を行
う。In this way, after the filling of 5 to 6 m in the longitudinal direction of the pipe body at one position, the position of the injection nozzle 8 is further retracted to the longitudinal direction of the pipe body 5 to 6 m, and the next filling is performed. To do.
【００１８】尚、このとき噴射ノズル８の角度は、図
４、図５に示すように、水平方向は管体２の軸方向に対
して４５。、上下方向は水平もしくはこれよりやや上向
きが好ましく、その角度及び噴流の流速は使用する埋め
戻し材の粒径、比重等の条件に応じて管体下への埋め戻
し材の沈降が最も効果的に行われるように他を充填開始
時に試験により選定し、然る後連続施工する。At this time, the angle of the injection nozzle 8 is 45 with respect to the axial direction of the tube body 2 in the horizontal direction as shown in FIGS . The vertical direction is preferably horizontal or slightly upward, and the angle and the jet flow velocity are most effective for the backfill material to settle below the pipe depending on the particle size and specific gravity of the backfill material used. Others will be selected by a test at the beginning of filling so that they will be continuously processed.
【００１９】埋め戻し材４としては、粒調砕石、単粒度
砕石、粗砂、水砕スラグ、粒状のスラグ、石炭灰造粒物
等の各種粉粒状材料が使用できる。As the backfill material 4, various powdered and granular materials such as grain crushed stone, single grain crushed stone, coarse sand, granulated slag, granular slag, and coal ash granulated material can be used.
【００２０】このようにして、管体２下を完全に埋め、
然る後、通常のバケットその他の通常の投下装置を使用
して埋め戻し材４を投入し、凹溝１内を埋め、管体２を
埋設する。In this way, the bottom of the tube 2 is completely filled,
After that, the backfill material 4 is put in using a normal bucket or other normal dropping device, the inside of the concave groove 1 is filled, and the pipe body 2 is buried.
【００２１】尚、上述の例では、管体２下の隙間の片側
埋め戻し材の投下によって、閉鎖した後、スラリーの噴
射による充填を行っているが、図７（ｃ）に示すように
スラリーの噴射のみによって隙間充填作業を行ってもよ
い。In the above example, the filling is performed by injecting the slurry after closing it by dropping the backfill material on one side of the gap below the tubular body 2, but the slurry is injected as shown in FIG. 7 (c). The gap filling operation may be performed only by injecting
【００２２】実験例
次に本発明の一実施形態を模型を使用した実験について
説明する。Experimental Example Next, an experiment using a model according to one embodiment of the present invention will be described.
【００２３】１．実験モデル
実験モデルは、表１に示すように１／２スケールで行っ
た。長さのスケールの縮尺に伴い、実現象と実験の計測
値との間に相似則を適用する。相似則にはフルード則を
適用する。このため、実験装置だけではなく、砕石の粒
径についても現場使用粒径の１／２サイズのものを使用
した。
1. Experimental Model The experimental model was performed on a 1/2 scale as shown in Table 1. Along the scale of the length scale, a similarity rule is applied between the actual phenomenon and the measured value of the experiment. Froude's law is applied to the similarity rule. Therefore, not only the experimental apparatus but also the crushed stone having a particle size of 1/2 of the particle size used in the field was used.
【００２４】２．実験設備
図６に示すように、水槽２０内に直径２０００ｍｍの埋
設管体の模型鋼管２１を水底より２５０ｍｍの間隔をあ
けて設置し、噴射ノズル２２を水平方向に向け、かつ、
模型鋼管２１の軸方向に対して４５度の角度で設置し、
水槽２０上の台車２３に支持させ、サンドポンプ２４に
よりスラリーを搬送し、噴射させた。2. Experimental equipment As shown in FIG. 6, a model steel pipe 21 of a buried pipe body having a diameter of 2000 mm is installed in the water tank 20 at a distance of 250 mm from the water bottom, and the injection nozzle 22 is oriented in the horizontal direction, and
Installed at an angle of 45 degrees to the axial direction of the model steel pipe 21,
The trolley 23 on the water tank 20 was supported, and the slurry was conveyed and jetted by the sand pump 24.
【００２５】尚、図中２５は流速計、２６はしぼり弁、
２７は給水用水中ポンプである。In the figure, 25 is a velocity meter, 26 is a throttle valve,
27 is a submersible pump for water supply.
【００２６】３．使用埋め戻し材
使用材料は、粒調砕石（１０〜４０ｍｍ）、粗砂、７号
砕石（２．５〜５ｍｍ）水砕スラグ等を対象として充填
性、地盤反力係数の期待値、塗装に与える影響から評
価、判断して７号砕石を選定した。3. Backfill material used The material used is for crushed grain (10-40 mm), coarse sand, granulated slag No. 7 (2.5-5 mm), etc. for filling properties, expected ground reaction coefficient, and coating. The No. 7 crushed stone was selected based on the evaluation and judgment based on the impact.
【００２７】実験に際してモデルスケールを１／２にし
ているため、材料は粒度分布が似ていて、５０％粒径が
７号砕石の１／２になる材料を使用した。また、従来工
法との資料比較とするため海砂相当品にあたる材料も用
意した。Since the model scale was halved during the experiment, the material used had a similar particle size distribution, and the 50% particle size was ½ that of No. 7 crushed stone. In addition, a material equivalent to sea sand was prepared for comparison with the conventional method.
【００２８】４．管体下隙間充填実験結果
（１）ケース１
ａ．方法：鋼管２１の片側に直投によって埋め戻し材を
積み上げた山により、管体下隙間の一方を閉鎖した後、
スラリー噴射による充填を行った。この時、山の安息角
は３０度であった。
ｂ．使用材料及びスラリー濃度：７号砕石相当品（メイ
セイサンド）、８％
ｃ．流速及び噴射時間：２（ｍ／ｓｅｃ）、１０分間
ｄ．計測・測定項目：充填状況、充填形状、流量、時
間、水搬量
ｅ．結果：図７（ａ）示すように管直下が充填すること
で、閉塞され、そこから先の先行投入した山裾に一部間
隙が生じた。
（２）ケース２
ａ．方法：鋼管２１の片側に直投によって埋め戻し材を
積み上げた山により、管体下隙間の一方を閉鎖した後、
スラリー噴射による充填を行った。この時、山の安息角
は３０度であった。
ｂ．使用材料及びスラリー濃度：７号砕石相当品（メイ
セイサンド）、９．３％
ｃ．流速及び噴射時間：２．５（ｍ／ｓｅｃ）、１０分
間
ｄ．計測・測定項目：充填状況、充填形状、流量、時
間、水搬量
ｅ．結果：図７（ｂ）に示すように管直下および先行投
入した山裾間隙の全てが充填した。
（３）ケース３
ａ．方法：管体下隙間の両側が開放された状態でスラリ
ー噴射による充填を行った。
ｂ．使用材料及びスラリー濃度：７号砕石相当品（メイ
セイサンド）、９．６％
ｃ．流速及び噴射時間：２．５（ｍ／ｓｅｃ）、１４分
間
ｄ．計測・測定項目：充填状況、充填形状、流量、時
間、水搬量
ｅ．結果：図７（ｃ）に示すように送る土量が多いため
管直下の充填が早く吐出口の反対側に一部空隙が残っ
た。
（４）ケース４
ａ．方法：従来工法と同様に投下のみによって埋め戻し
を行った。
ｂ．使用材料：７号砕石相当品（メイセイサンド）
ｃ．計測・測定項目：充填状況、充填形状
ｄ．結果：いずれも図８に示すように両側の山は自ら安
息角をもって鋼管下に入り込むが管直下に隙間が残っ
た。
（５）ケース５
ａ．方法：従来工法と同様に投下のみによって埋め戻し
を行った。
ｂ．使用材料：海砂相当品（粒調材）
ｃ．計測・測定項目：充填状況、充填形状
ｄ．結果：いずれも図８に示すように両側の山は自ら安
息角をもって鋼管下に入り込むが管直下に隙間が残っ
た。4. Results of gap filling experiment under tube (1) Case 1 a. Method: After closing one of the gaps under the tubular body with a pile in which the backfill material is piled up by direct casting on one side of the steel pipe 21,
Filling was performed by slurry injection. At this time, the angle of repose of the mountain was 30 degrees. b. Material used and slurry concentration: No. 7 crushed stone equivalent (Meisei Sand), 8% c. Flow rate and injection time: 2 (m / sec), 10 minutes d. Measurement / measurement items: filling status, filling shape, flow rate, time, water carrying amount e. Result: As shown in Fig. 7 (a), the area immediately below the pipe was filled with the material, and the area was closed, and a gap was partially formed in the skirt that was previously charged. (2) Case 2 a. Method: After closing one of the gaps under the tubular body with a pile in which the backfill material is piled up by direct casting on one side of the steel pipe 21,
Filling was performed by slurry injection. At this time, the angle of repose of the mountain was 30 degrees. b. Materials used and slurry concentration: No. 7 crushed stone equivalent product (Meisei Sand), 9.3% c. Flow rate and injection time: 2.5 (m / sec), 10 minutes d. Measurement / measurement items: filling status, filling shape, flow rate, time, water carrying amount e. Result: As shown in FIG. 7 (b), all of the gaps just below the pipe and the ridge gaps that were previously charged were filled. (3) Case 3 a. Method: Filling was performed by slurry injection in a state where both sides of the gap below the tubular body were open. b. Material used and slurry concentration: No. 7 crushed stone equivalent (Meisei Sand), 9.6% c. Flow rate and injection time: 2.5 (m / sec), 14 minutes d. Measurement / measurement items: filling status, filling shape, flow rate, time, water carrying amount e. Result: As shown in FIG. 7 (c), since the amount of soil to be sent was large, filling immediately under the pipe was fast and some voids remained on the opposite side of the discharge port. (4) Case 4 a. Method: Similar to the conventional method, backfilling was performed only by dropping. b. Material used: No. 7 crushed stone equivalent product (Meisei Sand) c. Measurement / measurement items: filling status, filling shape d. Result: As shown in FIG. 8, the ridges on both sides entered under the steel pipe with their angles of repose, but a gap remained just below the pipe. (5) Case 5 a. Method: Similar to the conventional method, backfilling was performed only by dropping. b. Materials used: Sea sand equivalent (grain preparation) c. Measurement / measurement items: filling status, filling shape d. Result: As shown in FIG. 8, the ridges on both sides entered under the steel pipe with their angles of repose, but a gap remained just below the pipe.
【００２９】[0029]
【発明の効果】上述したように本発明においては、砕石
等の埋め戻し材に注水し、スラリーとして搬送し、噴射
ノズルにより布設管体下の隙間に向けて噴射させること
によって管体下充填を行うようにしたことにより、布設
管体下が小さい隙間であっても密に充填されることとな
り、このため、水底に形成する凹溝を従来と比べて浅い
ものとでき、しかも、管体重量を埋め戻し材料によって
支えることができるため、従来に比べて肉厚の小さい管
体が使用可能となり、コストを大きく削減できる。INDUSTRIAL APPLICABILITY As described above, according to the present invention, the backfill material such as crushed stone is filled with water, conveyed as a slurry, and jetted toward the gap below the laid pipe body by the injection nozzle to fill the underbody of the pipe body. By doing so, even if there is a small gap under the laid pipe body, it will be densely filled, so that the groove formed on the bottom of the water can be made shallower than before, and the weight of the pipe body Since it can be supported by the backfill material, it is possible to use a tube body having a smaller wall thickness than the conventional one, and it is possible to greatly reduce the cost.
【００３０】また、充填に際し、管布設用凹溝内に設置
した水底布設管体の一方の側部の前記凹溝内に埋め戻し
材を投入して前記布設用管体下の隙間の片側を閉鎖し、
然る後他方の側部より前記水底布設管体下の隙間にスラ
リーを噴射させて埋め戻し材を水底布設管体下に充填す
るようにしたことにより効率よく完全な充填作業がなし
得られる。In addition, at the time of filling, a backfill material is put into the concave groove on one side of the water bottom laying pipe installed in the pipe laying groove so that one side of the gap below the laying pipe is filled. Closed,
After that, by injecting the slurry from the other side portion into the gap below the water bottom laying pipe to fill the backfill material under the water bottom laying pipe, a complete filling operation can be efficiently performed.
【図１】本発明方法に使用する装置の概略を示す一部切
断斜視図である。FIG. 1 is a partially cutaway perspective view showing an outline of an apparatus used in a method of the present invention.
【図２】本発明方法の施工工程における埋め戻し材搬入
前の状態の断面図である。FIG. 2 is a cross-sectional view showing a state before carrying in a backfill material in a construction step of the method of the present invention.
【図３】同上の埋め戻し材投入による隙間片側閉鎖状態
を示す断面図である。FIG. 3 is a cross-sectional view showing a closed state on one side of the gap when the backfill material is charged.
【図４】同上のスラリー噴射による充填状況を示す断面
図である。FIG. 4 is a cross-sectional view showing a filling state by the above-mentioned slurry injection.
【図５】同平面図である。FIG. 5 is a plan view of the same.
【図６】本発明の実験設備を示す断面図である。FIG. 6 is a sectional view showing experimental equipment of the present invention.
【図７】（ａ）〜（ｃ）は本発明方法による実験結果を
示す断面図である。7 (a) to 7 (c) are cross-sectional views showing experimental results by the method of the present invention.
【図８】従来法による実験結果を示す断面図である。FIG. 8 is a sectional view showing an experimental result by a conventional method.
ａ 隙間 １ 管布設用凹溝 ２ 水底布設管体 ３ 支持材 ４ 埋め戻し材 ５ 貯留槽 ６ 土運船 ７ 搬送手段 ８ スラリー噴射ノズル １０ 水中ポンプ １１ サンドポンンプ １２ 搬送管 １３ 重り ２０ 水槽 ２１ 模型鋼管 ２２ 噴射ノズル ２３ 台車 ２４ サンドポンプ ２５ 流速計 ２６ しぼり弁 ２７ 水中ポンプ a gap 1 Pipe laying groove 2 Water bottom laying pipe 3 Support materials 4 Backfill material 5 storage tanks 6 earth transport 7 Transport means 8 Slurry injection nozzle 10 Submersible pump 11 Sand pump 12 carrier tubes 13 weights 20 aquarium 21 model steel pipe 22 injection nozzle 23 dolly 24 Sand pump 25 Anemometer 26 Squeeze valve 27 Submersible Pump
───────────────────────────────────────────────────── フロントページの続き (72)発明者 尾崎 重浩 香川県高松市丸の内２番５号 四国電力 株式会社内 (72)発明者 山崎 忍 香川県木田郡牟礼町牟礼1007番地３ 株 式会社四電技術コンサルタント内 (72)発明者 大谷 宜孝 愛媛県松山市千舟町４−４−３ 五洋建 設株式会社四国支店内 (72)発明者 田下 貞夫 愛媛県松山市千舟町４−４−３ 五洋建 設株式会社四国支店内 (72)発明者 井上 茂 愛媛県松山市千舟町４−４−３ 五洋建 設株式会社四国支店内 (56)参考文献 特開 昭57−178018（ＪＰ，Ａ) 特開 平７−127042（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16L 1/12 E02B 3/00 E02D 17/12 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigehiro Ozaki Marunouchi 2-5 No. 5 in Takamatsu City, Kagawa Prefecture Shikoku Electric Power Co., Inc. (72) Shinobu Yamazaki 1007, Murei Town, Mure Town, Kida-gun, Kagawa Prefecture 3 Stock Company 4 Electrical engineering consultant (72) Inventor Yoshitaka Otani 4-4-3 Chifune-cho, Matsuyama-shi, Ehime Prefecture Syogoku Branch Co., Ltd. (72) Inventor Sadao Tashita 4-4-3 Chifune-cho, Matsuyama-shi, Ehime Prefecture Goyo Construction Co., Ltd. Shikoku Branch (72) Inventor Shigeru Inoue 4-4-3 Chifunecho, Matsuyama City, Ehime Prefecture Goyo Construction Co., Ltd. Shikoku Branch (56) Reference JP-A-57-178018 (JP, A) Japanese Patent Laid-Open No. 7-127042 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) F16L 1/12 E02B 3/00 E02D 17/12
Claims (4)
凹溝底面から間隔を隔てて設置した水底布設管体下の隙
間に埋め戻し材を充填する水底布設管体の管下充填方法
において、 砕石及び／又は砂等の埋め戻し材を陸上若しくは船上に
て水と混合してスラリーとなし、該スラリーを搬送管を
通して前記水底布設管体の側部に送り、該搬送管の開口
を前記水底布設管体下に向けて前記スラリーを噴射させ
ることにより前記埋め戻し材を水底布設管体下に充填す
ることを特徴としてなる水底布設管体の管下充填方法。1. A pipe bottom of a water bottom laying pipe body in which a backfill material is filled in a gap below the water bottom laying pipe body provided at a distance from the bottom face of the groove in a groove for pipe laying formed by excavation on the water bottom. In the filling method, a backfill material such as crushed stone and / or sand is mixed with water on land or on a ship to form a slurry, and the slurry is sent to a side portion of the water bottom laying pipe through a transfer pipe, A method for filling a bottom of a water bottom laying pipe by filling the backfill material under the bottom of the water bottom laying pipe by injecting the slurry toward the bottom of the water bottom laying pipe.
一方の側部の前記凹溝内に埋め戻し材を投入して前記布
設用管体下の隙間の片側を閉鎖し、然る後他方の側部よ
り前記水底布設管体下の隙間にスラリーを噴射させて埋
め戻し材を水底布設管体下に充填する請求項１に記載の
水底布設管体の管下充填方法。2. A backfill material is introduced into the groove on one side of the water bottom laying pipe installed in the pipe laying groove to close one side of the gap below the laying pipe. Then, the backfill material is filled under the water bottom laying pipe body by injecting the slurry into the gap below the water bottom laying pipe body from the other side to fill the water bottom laying pipe body under the pipe.
項１若しくは２に記載の水底布設管体の管下充填方法。3. The underfill filling method for a water bottom laying pipe according to claim 1, wherein the backfill material is crushed single-grain stone or sand.
し、これに注水してスラリーとする貯留槽と、該貯留槽
内のスラリーを搬送管を通して水底に搬送する手段と、
該搬送手段の前記搬送管の先端部に連結され、重りによ
って水底に設置され、搬送管を通して送られてくるスラ
リーを所定の角度で噴射させるスラリー噴射ノズルとを
備えてなる水底布設管体の管下充填装置。4. A storage tank for accommodating a backfill material such as crushed stone and / or sand and pouring water into the storage tank to form a slurry, and means for transferring the slurry in the storage tank to a water bottom through a transfer pipe.
A pipe of a water bottom laying pipe body, which is connected to the front end portion of the conveying pipe of the conveying means, is installed on the water bottom by a weight, and has a slurry injection nozzle for injecting the slurry sent through the conveying pipe at a predetermined angle. Bottom filling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29799298A JP3388385B2 (en) | 1998-10-20 | 1998-10-20 | Method and apparatus for filling underwater pipes below pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29799298A JP3388385B2 (en) | 1998-10-20 | 1998-10-20 | Method and apparatus for filling underwater pipes below pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000120929A JP2000120929A (en) | 2000-04-28 |
| JP3388385B2 true JP3388385B2 (en) | 2003-03-17 |
Family
ID=17853737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29799298A Expired - Fee Related JP3388385B2 (en) | 1998-10-20 | 1998-10-20 | Method and apparatus for filling underwater pipes below pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3388385B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2473471B (en) * | 2009-09-11 | 2011-11-09 | Technip France | Method of laying a pipeline in a seabed |
| KR100993580B1 (en) * | 2010-04-09 | 2010-11-10 | 오영재 | Laying method of pipe in water |
| CN108333064A (en) * | 2017-01-20 | 2018-07-27 | 辽宁工程技术大学 | A kind of rock ultra-low friction hydraulic loading test device |
-
1998
- 1998-10-20 JP JP29799298A patent/JP3388385B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000120929A (en) | 2000-04-28 |
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