JPH06264432A - Ground solidification device of sea bottom - Google Patents
Ground solidification device of sea bottomInfo
- Publication number
- JPH06264432A JPH06264432A JP7504993A JP7504993A JPH06264432A JP H06264432 A JPH06264432 A JP H06264432A JP 7504993 A JP7504993 A JP 7504993A JP 7504993 A JP7504993 A JP 7504993A JP H06264432 A JPH06264432 A JP H06264432A
- Authority
- JP
- Japan
- Prior art keywords
- water
- box
- drain
- ground improvement
- underground
- 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
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、水底軟弱地盤改良装置
及び改良方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water bottom soft ground improvement apparatus and method.
【０００２】[0002]
【従来の技術】従来の軟弱地盤の改良方法は、次のよう
な方法が知られている。 ＜イ＞ 図７に示す様に、水底から垂直に掘削した複数
の溝Ａ上に砂Ｂを敷設し、その砂Ｂを覆うようにシート
Ｃを展開して設置する。前記シートＣの一部を開口して
排水ホースＤが接続され、上方に配置したポンプＥと連
結している。そのポンプＥで吸引作動し、シートＣ内を
負圧状態にして砂Ｂを介して水底内の水分を上方へ排水
する。このようにして、水底の水分を排出して水底軟弱
地盤の改良を行う。2. Description of the Related Art The following methods are known as conventional methods for improving soft ground. <A> As shown in FIG. 7, sand B is laid on a plurality of trenches A vertically excavated from the water bottom, and a sheet C is spread and installed so as to cover the sand B. A drain hose D is connected by opening a part of the seat C, and is connected to a pump E arranged above. A suction operation is performed by the pump E to make the inside of the sheet C in a negative pressure state, and the water in the water bottom is drained upward through the sand B. In this way, the water at the bottom of the water is discharged to improve the soft ground at the bottom of the water.
【０００３】＜ロ＞ 図８に示す様に、水底から垂直に
ドレーンＦを打設し、この水底上に砂Ｇを敷設し、更に
砂Ｇの上方に埋立土Ｈを敷設する。この埋立土Ｈの自重
により、水底の水分をドレーンＦ及び砂Ｇを通して、水
中内に排出する。このようにして、水底の水分を排出し
て水底軟弱地盤の改良を行う。<B> As shown in FIG. 8, a drain F is laid vertically from the bottom of the water, sand G is laid on the bottom of the water, and landfill H is laid above the sand G. Due to the weight of the landfill soil H, the water on the bottom of the water is discharged into the water through the drain F and the sand G. In this way, the water at the bottom of the water is discharged to improve the soft ground at the bottom of the water.
【０００４】[0004]
【本発明が解決しようとする問題点】前記した従来の軟
弱地盤の改良技術では、地盤の改良範囲が広大である
と、大量の砂が必要となる。このため、軟弱地盤の改良
作業に多大な費用がかかってしまう。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-mentioned conventional technique for improving soft ground, a large amount of sand is required when the ground is vastly improved. Therefore, a great deal of cost is required for the work of improving the soft ground.
【０００５】[0005]
【本発明の目的】本発明は以上の点に鑑みて成されたも
ので、その目的とするところは、地盤改良を効率良く経
済的に行える水底軟弱地盤改良方法及び改良装置を提供
することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a water bottom soft ground improvement method and apparatus capable of efficiently and economically improving ground. is there.
【０００６】[0006]
【問題点を解決するための手段】即ち本発明は、下面を
開放した有天型の函体と、該函体を浮沈制御するバラス
ト室と、該函体内の天井面に付設したドレーン材と、該
天井面を上方より貫通して配設され、一端をドレーン材
と連通し、他端を吸水手段と連通した排出パイプとから
なる水底軟弱地盤改良装置である。[Means for Solving the Problems] That is, according to the present invention, a heavenly box having an open lower surface, a ballast chamber for controlling the ups and downs of the box, and a drain member attached to a ceiling surface of the box are provided. A water bottom soft ground improvement device comprising a discharge pipe which is disposed so as to pass through the ceiling surface from above and has one end communicating with a drain member and the other end communicating with a water absorbing means.
【０００７】また本発明は、前記の水底軟弱地盤改良装
置を用いた地盤改良方法であって、改良予定の水底にバ
ーチカルドレーンを打設設し、バラスト室に注水して前
記函体を沈降させ、該函体が水底に着底した後、函体内
部のドレーン材下方の水を外部に排出し、函体を水底内
に圧入して、水底内のバーチカルドレーンと函体内のド
レーン材を連通させ、前記バーチカルドレーンとドレー
ン材を経由させ、前記排出パイプを介して、水底地盤内
の水分を排出することを特徴とする水底軟弱地盤改良方
法である。Further, the present invention is a ground improvement method using the above-mentioned water bottom soft ground improvement device, in which a vertical drain is installed on the water bottom to be improved and water is poured into a ballast chamber to settle the box. , After the box bottoms on the bottom of the water, drain the water below the drain material inside the box to the outside, press the box into the bottom of the water, and connect the vertical drain in the bottom with the drain material inside the box. Then, the water in the water bottom soil is discharged through the discharge pipe through the vertical drain and the drain material, and the water bottom soft ground improvement method is provided.
【０００８】[0008]
【実施例１】以下図面を参照しながら本発明の一実施例
について説明する。 ＜イ＞地盤改良装置（図１） 図１に本発明に係る地盤改良装置１を示す。地盤改良装
置１は、有天型の函体１０と、この函体１０の上方に設
置されるバラスト室２０と、函体内に配設されるドレー
ン材１５と、函体１０内の水を外部に排出する排出パイ
プ１４とにより構成される。以下各部について詳述す
る。Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. <A> Ground improvement device (FIG. 1) FIG. 1 shows a ground improvement device 1 according to the present invention. The ground improvement device 1 includes a heavenly box 10, a ballast chamber 20 installed above the box 10, a drain member 15 arranged in the box, and water in the box 10 to the outside. And a discharge pipe 14 for discharging to Each part will be described in detail below.
【０００９】＜ロ＞函体（図１） 函体１０は、天井面１２と側面１１とからなり、下面を
開放した有天型の函体である。函体１０の側面１１の下
端には、掘削刃１１１が形成されている。この掘削刃１
１１は側面１１の外側を斜めに切断して形成されてお
り、函体１０の側面１１を水底地盤内に圧入し易くなっ
ている。掘削刃１１１の傾斜部分には噴出口１１２が開
設される。この噴出口１１２は、側面１１に付設した噴
出パイプ１２１及び側面１１内部に形成した噴出路１１
３を通って送り込まれるエアや水等の流体を噴出する部
位である。この噴出により、地盤改良装置１の水底地盤
内へ圧入が促進される。尚、噴出路１１３を設けずに、
噴出パイプ１２１を側面１１の外面を沿わせて配設し、
掘削刃１１１の所で下方に向けて開口させてもよい。<B> Box (FIG. 1) The box 10 is a celestial box having a ceiling surface 12 and side surfaces 11 and an open lower surface. An excavating blade 111 is formed at the lower end of the side surface 11 of the box 10. This drilling blade 1
11 is formed by obliquely cutting the outside of the side surface 11, so that the side surface 11 of the box body 10 can be easily press-fitted into the water bottom ground. A jet port 112 is opened in the inclined portion of the excavating blade 111. The jet port 112 includes the jet pipe 121 attached to the side surface 11 and the jet passage 11 formed inside the side surface 11.
It is a part for ejecting a fluid such as air or water sent through the nozzle 3. This jetting promotes press-fitting into the water bottom ground of the ground improvement device 1. In addition, without providing the ejection passage 113,
The jet pipe 121 is arranged along the outer surface of the side surface 11,
It may be opened downward at the drilling blade 111.
【００１０】＜ハ＞ドレーン材 ドレーン材１５は、函体１０内部の上面に付設されてお
り、公知の板状ドレーン材を採用できる。<C> Drain Material The drain material 15 is attached to the upper surface inside the box body 10, and a well-known plate-shaped drain material can be adopted.
【００１１】＜ニ＞バラスト室 バラスト室２０は、前記函体１０の上部に連続して形成
された密閉室である。バラスト室２０には、上面を貫通
して注排水パイプ２１及びエアパイプ２２が配設されて
いる。注排水パイプ２１によりバラスト室２０内に注水
及び排水を行うと共に、エアパイプ２２によりバラスト
室２０内にエアの排気及び供給を行って、バラスト室２
０の浮力を変化させ、地盤改良装置１の浮沈が制御され
る。尚、バラスト室２０は本実施例の様に、必ずしも函
体１０上部に連続して形成される必要はなく、函体１０
に浮力を付与して函体１０の浮沈を制御できるものであ
れば良い。<D> Ballast Chamber The ballast chamber 20 is a closed chamber formed continuously on the upper part of the box 10. A pouring / draining pipe 21 and an air pipe 22 are provided in the ballast chamber 20 so as to penetrate through the upper surface thereof. Water is poured into and drained from the ballast chamber 20 by the pouring and draining pipe 21, and air is exhausted and supplied into the ballast chamber 20 by the air pipe 22.
By changing the buoyancy of 0, the ups and downs of the ground improvement device 1 are controlled. The ballast chamber 20 does not necessarily have to be continuously formed on the upper part of the box 10 as in the present embodiment.
Any material can be used as long as it can control buoyancy of the box 10 by applying buoyancy to the.
【００１２】＜ホ＞排出パイプ 排出パイプ１４は、バラスト室２０を貫通して、函体１
０内部に連通して配設される。この排出パイプ１４は、
地盤改良装置１が水底に着底した後、函体１１内部の水
及びエアを前記ドレーン材１５を介して上方に吸引して
排出する部位である。<E> Discharge Pipe The discharge pipe 14 penetrates the ballast chamber 20 to form the box 1
It is arranged so as to communicate with the inside of the 0. This discharge pipe 14
After the ground improvement device 1 reaches the bottom of the water, the water and air in the box 11 are sucked upward through the drain material 15 and discharged.
【００１３】＜ヘ＞船（図２） 船４０は、図２に示す様に、船上に真空ポンプ４１、注
排水機４２及び噴出機４４（図示せず）を搭載し、前記
地盤改良装置１を曳航可能な動力を有するものである。
真空ポンプ４１は、前記排出パイプ１４とホース４３で
接続されており、排出パイプ１４に吸引力を付与し、函
体１０内部の水及びエアを排出する。また、注排水機４
２は、前記注排水パイプ２１及びエアパイプ２２とホー
ス４３で接続されている。この注排水機４２は、注排水
パイプ２１から排水する時はエアパイプ２２へエアを供
給し、注排水パイプ２１に注水する時はエアパイプ２２
から排気する。噴出機４４は、前記噴出パイプ１２１に
エアや水等の流体を供給する部位であり、ホースにより
噴出パイプ１２１と接続されている。<F> Ship (FIG. 2) The ship 40 is equipped with a vacuum pump 41, a pouring / discharging machine 42 and a jetting machine 44 (not shown) on the ship as shown in FIG. It has the power to tow.
The vacuum pump 41 is connected to the discharge pipe 14 by a hose 43, applies a suction force to the discharge pipe 14, and discharges water and air inside the box 10. In addition, pouring and draining machine 4
2 is connected to the pouring / draining pipe 21 and the air pipe 22 by a hose 43. The pouring / draining machine 42 supplies air to the air pipe 22 when the water is drained from the pouring / draining pipe 21, and the air pipe 22 when pouring the water into the pouring / draining pipe 21.
Exhaust from. The spouting machine 44 is a part that supplies fluid such as air and water to the spouting pipe 121, and is connected to the spouting pipe 121 by a hose.
【００１４】[0014]
【作用】次に海底軟弱地盤などの地盤改良方法について
説明する。 ＜イ＞地盤改良装置の曳航 水底３０の地盤改良予定地に複数のバーチカルドレーン
３１を打設しておく。地盤改良装置１を地盤改良予定地
まで船４０により曳航する。[Operation] Next, a method for improving ground such as soft seabed will be described. <B> Towing of ground improvement device A plurality of vertical drains 31 are installed in the ground improvement planned site on the water bottom 30. The ground improvement device 1 is towed to the ground improvement planned site by the ship 40.
【００１５】＜ロ＞地盤改良装置の沈設（図２） 図２に示す様に、船４０の注排水機４２を作動させ、ホ
ース４３を介して地盤改良装置１０の注排水パイプ２１
からバラスト室２０内に水を注水する。また、注水と同
時にエアパイプ２２からバラスト室２０内のエアを排出
する。バラスト室２０に注水が進むにつれ、地盤改良装
置１は浮力を失い、沈降していく。地盤改良装置１の沈
降状態を確認し、バラスト室２０の注水量を調整して沈
降速度を制御する。<B> Sinking of the soil improvement device (FIG. 2) As shown in FIG. 2, the pouring / draining machine 42 of the ship 40 is operated, and the pouring / draining pipe 21 of the soil improvement device 10 is connected via the hose 43.
Water is poured into the ballast chamber 20 from. At the same time as the water injection, the air in the ballast chamber 20 is discharged from the air pipe 22. As the water is injected into the ballast chamber 20, the ground improvement device 1 loses buoyancy and sinks. The sedimentation state of the ground improvement device 1 is confirmed, and the amount of water injected into the ballast chamber 20 is adjusted to control the sedimentation speed.
【００１６】＜ハ＞地盤改良装置の圧入（図３、図４） 地盤改良装置１が水底に着底したら、船上の真空ポンプ
４１及び噴出機４４（図示せず）を作動させる。真空ポ
ンプ４１とホース４３を介して連通する排出パイプ１４
に吸引力が発生し、噴出機と連通する噴出口１１２に噴
出力が発生する。そして、図３に示す様に、函体１０内
部の水はドレーン材１５を透過して排出パイプ１４から
排水される。このため、内室１３内は外部の水圧に対し
て負圧状態になり、函体１０は外部の水圧により水底３
０内に圧入される。また、図４に示す様に、噴出機４４
により送り込まれた水又はエアなどの流体が噴出路１１
３を通り噴出口１１２から噴出し、掘削刃１１１の下方
の地盤を掘削して、函体１０の水底３０内への圧入を助
長する。この時、噴出した流体は、掘削刃１１１の傾斜
部分に沿って流出していくので、函体１０内部に流入す
ることはない。このため、函体１０内部への流体が流入
して、排出パイプ１４の排水作業の能率が低下すること
はない。<C> Press-fitting of the ground improvement apparatus (FIGS. 3 and 4) When the ground improvement apparatus 1 reaches the bottom of the water, the on-board vacuum pump 41 and the ejector 44 (not shown) are operated. A discharge pipe 14 communicating with the vacuum pump 41 via a hose 43.
A suction force is generated in the nozzle, and a jetting force is generated at the jetting port 112 communicating with the jetting machine. Then, as shown in FIG. 3, the water inside the box body 10 passes through the drain material 15 and is drained from the drain pipe 14. Therefore, the inside of the inner chamber 13 is in a negative pressure state with respect to the external water pressure, and the box body 10 is exposed to the external water pressure to cause the bottom 3
It is pressed into 0. In addition, as shown in FIG.
The fluid such as water or air sent by
The water is ejected from the ejection port 112 through 3 to excavate the ground below the excavation blade 111 to promote press-fitting of the box body 10 into the water bottom 30. At this time, the ejected fluid flows out along the inclined portion of the excavating blade 111, and thus does not flow into the box 10. Therefore, the fluid does not flow into the box body 10 and the efficiency of the drainage work of the discharge pipe 14 does not decrease.
【００１７】＜ニ＞圧密排水（図５） 函体１０の側面１１が水底３０内に圧入していき、ドレ
ーン材１５が水底３０に当接したら、噴出機４４を停止
し噴出口１１２から流体の噴出を止める。真空ポンプ４
１については、継続して作動させ、排出パイプ１４の排
水作業を続行する。水底３０内に打設されたバーチカル
ドレーン３１とドレーン材１５とは当接して連通するの
で、排出パイプ１４の吸引力がドレーン材１５を介して
バーチカルドレーン３１まで効率良く伝達される。この
ため、排出パイプ１４により水底３０内の水分を効率良
く排出できる。<D> Consolidation drainage (FIG. 5) When the side surface 11 of the box 10 is press-fitted into the water bottom 30 and the drain material 15 comes into contact with the water bottom 30, the ejector 44 is stopped and the fluid is discharged from the ejection port 112. Stop the eruption of. Vacuum pump 4
Regarding No. 1, it is continuously operated, and the drainage work of the discharge pipe 14 is continued. Since the vertical drain 31 cast in the water bottom 30 and the drain material 15 contact and communicate with each other, the suction force of the discharge pipe 14 is efficiently transmitted to the vertical drain 31 via the drain material 15. Therefore, the water in the water bottom 30 can be efficiently discharged by the discharge pipe 14.
【００１８】＜ホ＞地盤改良装置の浮上及び移動（図
６） 十分に水底３０内の水分を排出したら、真空ポンプ４１
を停止する。注排水機４２を作動させて、注排水パイプ
２１に吸引力を与えバラスト室２０内の水を注排水パイ
プ２１で排水すると共に、エアパイプ２２からエアを供
給する。 バラスト室２０に浮力が生ずるので、地盤改
良装置１は水底３０から離脱し浮上する。そして、船４
０で地盤改良装置１を次の地盤改良予定地まで曳航して
順次地盤改良を行う。<E> Floating and moving of ground improvement device (FIG. 6) When the water in the water bottom 30 is sufficiently discharged, the vacuum pump 41
To stop. The pouring / draining machine 42 is operated to apply suction force to the pouring / draining pipe 21 to drain the water in the ballast chamber 20 with the pouring / draining pipe 21, and supply air from the air pipe 22. Since buoyancy is generated in the ballast chamber 20, the ground improvement device 1 separates from the water bottom 30 and floats. And ship 4
At 0, the ground improvement device 1 is towed to the next ground improvement planned site and the ground is improved one by one.
【００１９】[0019]
【実施例２】本実施例は、前記実施例１の地盤改良方法
において、地盤改良予定地の地盤改良終了後、地盤改良
装置１を水底３０上に沈設し、バラスト室２０内にコン
クリートや砂等を充填して、地盤改良装置１を護岸や防
波堤等の構造物の基礎とするものである。本実施例によ
れば、水底軟弱地盤の改良後、地盤改良装置１を有効に
利用することができる。[Embodiment 2] In this embodiment, in the ground improvement method of the above-mentioned Embodiment 1, after the completion of the ground improvement of the ground improvement planned site, the ground improvement device 1 is submerged on the water bottom 30, and the ballast chamber 20 is filled with concrete or sand. Etc., and the ground improvement device 1 is used as the basis of structures such as seawalls and breakwaters. According to this embodiment, the ground improvement device 1 can be effectively used after the improvement of the soft seabed.
【００２０】[0020]
【発明の効果】本発明は以上説明したようになるから次
のような効果を得ることができる。 ＜イ＞ 地盤改良装置の函体内部の天井面にドレーン材
を付設したので、地盤改良装置を水底に沈設した際に、
水底内に打設したバーチカルドレーンとドレーン材が連
通し、水底内の水分を効率良く排出することができる。Since the present invention is as described above, the following effects can be obtained. <B> Since a drain material is attached to the ceiling surface inside the box of the ground improvement device, when the ground improvement device is sunk to the bottom of the water,
The vertical drain placed in the bottom of the water communicates with the drain material, and the water in the bottom of the water can be efficiently discharged.
【００２１】＜ロ＞ 地盤改良装置の内室の天井面に付
設したドレーン材がバーチカルドレーンから排出パイプ
までの排水経路となるので、水底地盤改良予定地に大量
の砂を敷設する必要がない。従って、経済的に水底の地
盤改良作業が行える。<B> Since the drain material attached to the ceiling surface of the inner chamber of the ground improvement device serves as a drainage path from the vertical drain to the discharge pipe, it is not necessary to lay a large amount of sand at the planned site for water bottom ground improvement. Therefore, it is possible to economically perform ground improvement work on the bottom of the water.
【図１】 地盤改良装置の説明図FIG. 1 is an explanatory diagram of a ground improvement device.
【図２】 地盤改良方法の説明図[Fig. 2] Illustration of ground improvement method
【図３】 地盤改良方法の説明図[Fig. 3] An explanatory diagram of the ground improvement method
【図４】 図３におけるIVの拡大図FIG. 4 is an enlarged view of IV in FIG.
【図５】 地盤改良方法の説明図FIG. 5 is an explanatory diagram of a ground improvement method.
【図６】 地盤改良方法の説明図FIG. 6 is an explanatory diagram of the ground improvement method.
【図７】 従来の地盤改良方法の説明図FIG. 7 is an explanatory diagram of a conventional ground improvement method.
【図８】 従来の地盤改良方法の説明図FIG. 8 is an explanatory diagram of a conventional ground improvement method.
Claims (2)
ーン材と連通し、他端を吸水手段と連通した排出パイプ
とからなる、 水底軟弱地盤改良装置。1. A heavenly box having an open lower surface, a ballast chamber for controlling the floating and sinking of the box, a drain material installed in the box, and a ceiling surface of the box penetrating from above. A water bottom soft ground improvement device, which is provided with a drain pipe having one end communicating with a drain material and the other end communicating with a water absorbing means.
た地盤改良方法であって、 改良予定の水底にバーチカルドレーンを打設し、 バラスト室に注水して前記函体を沈降させ、 該函体が水底に着底した後、函体内部のドレーン材下方
の水を外部に排出し、函体を水底内に圧入して、水底内
のバーチカルドレーンと函体内のドレーン材を連通さ
せ、 前記バーチカルドレーンとドレーン材を経由させ、前記
排出パイプを介して、水底地盤内の水分を排出すること
を特徴とする、 水底軟弱地盤改良方法。2. A ground improvement method using the water soft ground improvement device according to claim 1, wherein a vertical drain is placed on the water bottom to be improved, and water is poured into a ballast chamber to settle the box. After the box bottoms on the bottom of the water, the water below the drain material inside the box is discharged to the outside, the box is pressed into the bottom, and the vertical drain in the bottom and the drain material inside the box are connected. A water bottom soft ground improvement method, characterized in that water in the water bottom ground is discharged through the discharge pipe through the vertical drain and the drain material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7504993A JP2840908B2 (en) | 1993-03-10 | 1993-03-10 | Underwater soft ground improvement device and improvement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7504993A JP2840908B2 (en) | 1993-03-10 | 1993-03-10 | Underwater soft ground improvement device and improvement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06264432A true JPH06264432A (en) | 1994-09-20 |
| JP2840908B2 JP2840908B2 (en) | 1998-12-24 |
Family
ID=13564965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7504993A Expired - Fee Related JP2840908B2 (en) | 1993-03-10 | 1993-03-10 | Underwater soft ground improvement device and improvement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2840908B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002121754A (en) * | 2000-10-13 | 2002-04-26 | Ohbayashi Corp | Method for constructing underwater foundation |
| CN102373707A (en) * | 2011-07-27 | 2012-03-14 | 中交天津港湾工程研究院有限公司 | Method for rapidly driving plastic draining plate by electrifying (low-voltage direct current) |
| WO2017159692A1 (en) * | 2016-03-18 | 2017-09-21 | 正佳 近藤 | Vacuum consolidation and dredging method, tower-like airtight preloading caisson, and dedicated work ship |
| CN109440759A (en) * | 2018-10-24 | 2019-03-08 | 中国海洋大学 | It is a kind of to make the processing unit and processing method that soil layer precipitation consolidates in submarine soil layer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021065691A1 (en) * | 2019-10-03 | 2021-04-08 | 正佳 近藤 | Vacuum consolidation method, vacuum consolidation dredging method, and vertical drain |
-
1993
- 1993-03-10 JP JP7504993A patent/JP2840908B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002121754A (en) * | 2000-10-13 | 2002-04-26 | Ohbayashi Corp | Method for constructing underwater foundation |
| CN102373707A (en) * | 2011-07-27 | 2012-03-14 | 中交天津港湾工程研究院有限公司 | Method for rapidly driving plastic draining plate by electrifying (low-voltage direct current) |
| WO2017159692A1 (en) * | 2016-03-18 | 2017-09-21 | 正佳 近藤 | Vacuum consolidation and dredging method, tower-like airtight preloading caisson, and dedicated work ship |
| JPWO2017159692A1 (en) * | 2016-03-18 | 2018-09-13 | 正佳 近藤 | Vacuum-consolidated dredging method, tower-type airtight loading box and dedicated work ship. |
| CN109440759A (en) * | 2018-10-24 | 2019-03-08 | 中国海洋大学 | It is a kind of to make the processing unit and processing method that soil layer precipitation consolidates in submarine soil layer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2840908B2 (en) | 1998-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2557376B2 (en) | Device and method for moving sediment on the bottom of the water | |
| US3965687A (en) | Apparatus for anchoring a structure to the floor of a body of water | |
| US6189243B1 (en) | Dredging method and dredging apparatus | |
| US11959248B2 (en) | Device for the removal of sludge and/or sand from the bottom of a wetland | |
| CN111636502A (en) | Sand mining construction process based on cutter suction dredger | |
| JP4030389B2 (en) | Dredging system and dredging method for large capacity reservoir | |
| JPH06264432A (en) | Ground solidification device of sea bottom | |
| JP3387397B2 (en) | Method and apparatus for reducing peripheral friction during caisson penetration | |
| RU2053366C1 (en) | Method for mining of iron-manganese concretions from ocean bottom and device for its embodiment | |
| NL1002893C2 (en) | Dredging equipment. | |
| KR100557840B1 (en) | Dredging system without secondary pollution by floating matters | |
| JP4341772B2 (en) | 浚 渫 Method and 浚 渫 System | |
| JP5731243B2 (en) | Fixed dam construction method | |
| RU2796876C2 (en) | Device for removing sediment and/or sand from the bottom of a swampy area | |
| JPS61162634A (en) | Method and device of sinking steel plate cell for installation | |
| JP2005220598A (en) | Equipment for cleaning accumulated sediment on bottom of river | |
| JP3446186B2 (en) | Pollution control caisson for dredging and dredging method | |
| KR101365184B1 (en) | Apparatus for burying cable line simultaneously with excavating submarine surface | |
| CN115637721B (en) | Active control method for sinking of open caisson structure of bridge pier | |
| JPS5931326A (en) | Submarine cable burying machine | |
| JPH0127205B2 (en) | ||
| KR200346194Y1 (en) | Dredging system without secondary pollution by floating matters | |
| GB1401141A (en) | Storage tank system | |
| JPS58106026A (en) | Low-muddy dredger for water reservoir | |
| JP4182583B2 (en) | Ground permeability improvement method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071023 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 10 Free format text: PAYMENT UNTIL: 20081023 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 11 Free format text: PAYMENT UNTIL: 20091023 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101023 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101023 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 13 Free format text: PAYMENT UNTIL: 20111023 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111023 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121023 Year of fee payment: 14 |
|
| LAPS | Cancellation because of no payment of annual fees |