JP2013064279A - Reclamation method and reclamation apparatus for improved dredge soil - Google Patents
Reclamation method and reclamation apparatus for improved dredge soil Download PDFInfo
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- JP2013064279A JP2013064279A JP2011204078A JP2011204078A JP2013064279A JP 2013064279 A JP2013064279 A JP 2013064279A JP 2011204078 A JP2011204078 A JP 2011204078A JP 2011204078 A JP2011204078 A JP 2011204078A JP 2013064279 A JP2013064279 A JP 2013064279A
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- 239000002689 soil Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 12
- 239000002893 slag Substances 0.000 claims abstract description 32
- 239000004576 sand Substances 0.000 claims description 42
- 239000000463 material Substances 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 7
- 239000013049 sediment Substances 0.000 abstract description 4
- 239000003583 soil stabilizing agent Substances 0.000 abstract 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 6
- 238000005266 casting Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000010169 landfilling Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
Description
本発明は、浚渫土砂と製鋼スラグなどの改良材を混合し、安全かつ確実に海底に投入する作業を１隻の専用船でおこなうものである。 In the present invention, the work of mixing dredged material and improved materials such as steelmaking slag and safely and surely putting them into the seabed is performed with one dedicated ship.
浚渫工事により生じた浚渫土砂にスラグを混合して海底に投入して浚渫土砂の土質を改善して埋立がおこなわれており、図５に示すように、浚渫船で浚渫をおこない、浚渫土砂を土運船に積み込んで台船へ運搬し、台船において浚渫土砂とスラグを混合し、土質改良した浚渫土砂を水底に打設している。
しかしながら、浚渫土砂とスラグの混合土は、台船から単に海中に投下されるので海底に到達するまでに浚渫土砂とスラグが分離して固化強度が低下することがあり、十分な強度の埋立地盤が得られない。
Slag is mixed with dredged sand generated by dredging work and thrown into the seabed to improve the quality of dredged sand. The dredging is carried out with dredgers as shown in Fig. They are loaded onto a ship and transported to a trolley where dredged sand and slag are mixed in the trolley, and dredged sand with improved soil quality is placed on the bottom of the water.
However, since the mixed soil of dredged sand and slag is simply dropped into the sea from the trolley, the dredged sand and slag may separate before reaching the bottom of the sea, reducing the solidification strength. Cannot be obtained.
また、パイプ内において浚渫土砂と土質改良剤を混合する管中混合固化処理工法が提案されているが、浚渫土砂とスラグの混合・混練と、水中打設とが別個の工程となり、船団・機器構成が複雑になり、コスト高になると共に、混合土が弁を通して圧送されることから、弁の保護のために異物を浚渫土砂とスラグから除去する必要があり、作業が煩雑であった。
そこで、特許文献２（特開２００９−２０３６号公報）では、図６に示すように、水中打設管を装備した水中打設用台船を使用し、水中打設管に浚渫土砂とスラグを投入し、水中打設管の内部で撹拌混合して水中打設管内に堆積させることが開示されている。
In-pipe mixing and solidification treatment method has been proposed in which dredged sand and soil conditioner are mixed in the pipe, but dredging and mixing of dredged sand and slag and underwater casting are separate processes. Since the structure becomes complicated and the cost is high, and the mixed soil is pumped through the valve, it is necessary to remove foreign substances from the dredged sand and slag to protect the valve, and the work is complicated.
Therefore, in Patent Document 2 (Japanese Patent Application Laid-Open No. 2009-2036), as shown in FIG. 6, a submersible carriage equipped with a submerged placement pipe is used, and dredged sand and slag are put on the submerged placement pipe. It is disclosed that it is put in, stirred and mixed inside the submerged casting tube, and deposited in the submerged casting tube.
特許文献１の水中に設置した水中打設管内で浚渫土砂とスラグを混合する方法では、水中打設管の容量によって混合する浚渫土砂量が限定され、また、連続的に改良土を海底に打設することができず、作業効率の改善の余地があった。
本発明は、浚渫土砂と土質改良剤のスラグの混合打設を連続的におこない、改良土の海底への打設効率を高めて施工期間を短縮することを目的とするものであり、施工期間の短縮にともないコストの低減を達成しようとするものである。
In the method of mixing dredged sand and slag in the submerged casting pipe installed in the water of Patent Document 1, the amount of dredged sand to be mixed is limited by the capacity of the submerged casting pipe, and the improved soil is continuously hit the seabed. There was room for improvement in work efficiency.
The present invention aims to reduce the construction period by continuously placing mixed slag of dredged soil and soil quality improver and increasing the efficiency of placing the improved soil on the seabed. This is intended to achieve a reduction in cost as a result of shortening.
浚渫土砂とスラグを所定の割合でホッパーに投入し、加圧ポンプで浚渫土砂とスラグを加圧してプラグ流を発生させ、複数の拡径部が間隔をおいて設けてある圧送管に送り込み、この拡径部内に圧縮空気を吹き込んで浚渫土とスラグを撹拌混合し、混合された浚渫土とスラグをトレミー管で海中に打設する改良浚渫土砂の埋立工法である。
台船に浚渫土砂とスラグを受け入れる計量装置を具備したホッパーが設けてあり、このホッパーの排出部には圧送管が接続されており、圧送管は複数の拡径部が間隔をおいて設けてあると共に、この拡径部には圧縮空気を送り込む複数の圧気管がその圧気の噴射方向を変えて接続されており、圧気管は減勢装置を介してトレミー管に接続されている改良浚渫土砂の埋立装置である。
Put the dredged sand and slag into the hopper at a predetermined ratio, pressurize the dredged sand and slag with a pressurization pump to generate a plug flow, and send it to the pressure feeding pipe where a plurality of enlarged diameter parts are provided at intervals, This is an improved dredged sand reclamation method in which compressed air is blown into the expanded diameter portion to mix and mix dredged clay and slag, and the mixed dredged clay and slag are placed in the sea with a tremy tube.
A hopper equipped with a weighing device for receiving dredged sand and slag is provided on the trolley, and a pressure feed pipe is connected to the discharge part of the hopper, and the pressure feed pipe is provided with a plurality of enlarged diameter portions at intervals. In addition, a plurality of pressurized air pipes for sending compressed air are connected to the expanded diameter portion by changing the injection direction of the compressed air, and the pressurized air pipe is connected to the tremy pipe through a depressurizing device. This is a landfill device.
本発明によれば浚渫土砂と土質改良剤のスラグを連続的に混合することができ、混合土の海中への投入を１隻の台船で施工するものであるので、工期の短縮、及びコストの低減が達成されると共に、浚渫土砂の土質や含水率に応じて改良剤の混合割合の変更が容易であるので、混合土の品質管理が容易となり、最適な混合比で強度の大きな改良土を得ることができる。
また、混合土の圧送管が台船上に配置されているため、従来技術のように混合場所から打設場所まで圧送管を配設する必要がなく、台風来襲などの悪天候時においても、台船の退避を短時間でおこなうことができ、安全に施工ができ、工事の再開も段取りが簡易であって短時間で再開できることから、施工期間の短縮が可能である。
浚渫土砂と改良材のスラグを計量して混合し、船内のプラグ流発生式圧送管内で混合させ、浚渫土砂の海中への打設に当たっては、台船に装備した伸縮自在のトレミー管を使用するため、すべての工程をほぼ密閉状態で施工することができるので、海洋汚濁が防止され、また、大気中への粉塵等の飛散を防止することができる。
According to the present invention, dredged sand and slag of soil condition improver can be continuously mixed, and the introduction of the mixed soil into the sea is carried out with a single ship, so the construction period can be shortened and the cost can be reduced. Is achieved, and it is easy to change the mixing ratio of the improver according to the soil quality and moisture content of the dredged sand. Can be obtained.
In addition, since the mixed soil pressure feed pipe is arranged on the trolley, there is no need to place the pressure feed pipe from the mixing location to the placement location as in the prior art, and even in bad weather such as typhoon invasion, the trolley Evacuation can be carried out in a short time, construction can be performed safely, and the resumption of the construction can be resumed in a short time since the setup is simple and can be resumed in a short time.
The dredged sand and the slag of the improved material are weighed and mixed, mixed in a plug flow generation type pressure feed pipe inside the ship, and when placing the dredged earth sand into the sea, an extendable tremy pipe equipped on the carrier is used. Therefore, since all processes can be performed in a substantially sealed state, marine pollution can be prevented and scattering of dust and the like into the atmosphere can be prevented.
本発明の浚渫土砂による埋立工法は、図１に示すように、浚渫土砂と地盤改良材のスラグを夫々計量して最適な混合比でホッパー１に投入して混合するものである。
浚渫土砂の含水量などの特性を考慮して最適な混合土が得られるスラグの混合量を定め、定量フィーダ１１で所定量をプラグ流発生装置２に送り込んでプラグ流を生成する。プラグ流発生装置２は圧縮空気を圧送管３内に送り込む加圧ポンプ２１を具備するものであり、特許文献２（特許第３０６９９７６号公報）に開示された公知の装置である。含水比の高い浚渫土砂と地盤改良材を混合して圧送することによって圧送管路内で撹拌混合して改良土を得るものである。
その原理は、圧送管内に圧縮空気を供給すると、圧送管の下部に土砂が堆積し、圧縮空気が圧送管上部を流れる状態となり、堆積した土砂の表面が波立って土砂が圧送管を塞ぎ（プラグ状態）、その結果、土砂が圧縮空気によって圧送される。そして、再び圧縮空気が土砂上面を流れる状態となり、土砂表面が波立ってプラグ状態になって圧送されるということが繰り返されるので、土砂と地盤改良材が撹拌混合されながら圧送されるのである。
The landfill method using dredged sand according to the present invention, as shown in FIG. 1, measures dredged sand and slag of ground improvement material, respectively, puts them into the hopper 1 at an optimum mixing ratio, and mixes them.
In consideration of characteristics such as the water content of dredged sand, the mixing amount of slag from which an optimum mixed soil is obtained is determined, and a predetermined amount is sent to the plug flow generator 2 by the quantitative feeder 11 to generate a plug flow. The plug flow generator 2 includes a pressurizing pump 21 that feeds compressed air into the pressure feed pipe 3, and is a known device disclosed in Patent Document 2 (Japanese Patent No. 3069976). The dredged sand with a high water content and the ground improvement material are mixed and pumped to mix and mix in the pumping pipe to obtain improved soil.
The principle is that when compressed air is supplied into the pumping pipe, earth and sand accumulates in the lower part of the pumping pipe, and the compressed air flows through the upper part of the pumping pipe. As a result, the sediment is pumped by compressed air. The compressed air again flows over the earth and sand surface, and the earth and sand surface undulates into a plug state and is repeatedly pumped. Thus, the earth and sand and the ground improvement material are pumped while being agitated and mixed.
本発明は、このプラグ流を利用するものであるが、土砂とスラグの混合及び海中への打設を台船上でおこなうものであるので、圧送管３の長さを大きくすることができないため撹拌混合が十分とはいえない。台船の長さが５０ｍ程度とすると、圧送管の長さは３０ｍ程度しか取れず、十分な撹拌混合がおこなわれないことになる。そのため、圧送管３の途中に間隔をあけて複数の拡径部３１を設け、土砂流が拡径部３１における断面変化によって激しく波立つようにして浚渫土砂とスラグの混合が確実におこなわれるようにしてあり、図１の例では、３ｍおきに長さ３ｍ程度の拡径部３１を５個設けてある。
拡大部３１の直径は、圧送管３の直径が４００ｍｍの場合、直径８００ｍｍであり、倍の直径としてある。
Although the present invention uses this plug flow, since mixing of earth and sand and slag and placing in the sea is carried out on a trolley, the length of the pressure feed pipe 3 cannot be increased, so that stirring is performed. Mixing is not enough. If the length of the trolley is about 50 m, the length of the pressure feed pipe can only be about 30 m, and sufficient stirring and mixing cannot be performed. Therefore, a plurality of enlarged diameter portions 31 are provided at intervals in the middle of the pressure feeding pipe 3 so that the earth and sand flows violently by the cross-sectional change in the enlarged diameter portion 31 so that the dredged sand and slag can be mixed reliably. In the example of FIG. 1, five enlarged diameter portions 31 having a length of about 3 m are provided every 3 m.
The diameter of the enlarged portion 31 is 800 mm when the diameter of the pressure feeding tube 3 is 400 mm, which is a double diameter.
また、図２に示すように、圧送管３の途中に設けた拡径部３１には圧気を拡径部に噴出させる圧気口３５がこの実施例では３個設置してあり、それらの圧気口３５の噴出方向は異なる方向に向けてある。図２の例では、プラグ流の進行方向、逆方向、及び進行方向に直角方向の３方向に向けて圧縮空気を噴出させるように圧気口３５が設けてあり、圧縮空気を噴出することによって拡径部３１において土砂流が大きく波打つようようにして浚渫土砂とスラグの撹拌混合が十分おこなわれるようにしてある。
このように、複数の拡径部３１においてプラグ流が大きく波打つことから浚渫土砂とスラグが均一に混合されることになり、改良土の品質が平均化されて均質なものとなる。
In addition, as shown in FIG. 2, in the enlarged diameter portion 31 provided in the middle of the pressure feeding pipe 3, there are provided three pressurized air ports 35 for injecting pressurized air to the enlarged diameter portion in this embodiment. The jet direction of 35 is directed in different directions. In the example of FIG. 2, the pressurized air port 35 is provided so as to eject the compressed air in three directions that are perpendicular to the traveling direction, the reverse direction, and the traveling direction of the plug flow, and is expanded by ejecting the compressed air. The dredged sand and slag are sufficiently mixed and stirred so that the sediment flow is greatly undulated in the diameter portion 31.
Thus, since the plug flow greatly undulates in the plurality of enlarged diameter portions 31, the dredged sand and slag are uniformly mixed, and the quality of the improved soil is averaged and becomes uniform.
そして、トレミー管５の上部に圧送管３を竪管３２で引き回し、上部に設けた減勢装置４で圧送された混合土の勢いを弱め、トレミー管５で海底に改良された浚渫土砂を打設するものである。
トレミー管５は、台船から海底までの長さを調整することができるように伸縮自在としてあり、様々な水深の施工場所に適用可能であり、改良土が海水中を落下中に分散することなく安定した状態で海底に着底させることができる。
更に、トレミー管５は二重構造としてあり、浚渫土砂の投入の際に浮遊しやすい土粒子を二重にしたトレミー管５の内管と外管の水位差によって生じる循環流を利用し、トレミー管内に滞留させることで周囲の海水の濁りやアクなどによる水質汚染を低減することができる。
Then, the pressure feeding pipe 3 is routed by the dredging pipe 32 at the upper part of the tremy pipe 5, the momentum of the mixed soil pumped by the depressing device 4 provided at the upper part is weakened, and the improved dredged sand is hit by the tremy pipe 5 on the seabed. It is to be established.
The tremy pipe 5 is extendable so that the length from the trolley to the seabed can be adjusted, and can be applied to construction sites of various depths. It is possible to land on the seabed in a stable state.
Furthermore, the tremy pipe 5 has a double structure and uses the circulation flow generated by the difference in water level between the inner pipe and the outer pipe of the tremy pipe 5 in which soil particles that are likely to float when the dredged sand is thrown in are doubled. By staying in the pipe, it is possible to reduce water pollution caused by turbidity of the surrounding seawater and aqua.
図３及び図４は、本発明の埋立工法を実施するためのシステムを台船に設置した一例を示すものであり、長さ約５０ｍ、幅３０ｍの台船１０に図１のシステムを設置したものであり、トレミー管５は台船１０から海底に届くように設置したものである。
台船１０の両脇には、スラグと浚渫土砂を運搬してきたボックスバージ７０、７１が横付けされており、台船１０に旋回可能に設置されたバックホー６によって浚渫土砂とスラグがホッパー１に投入され、前記したように混合土が圧送管３と拡大部３１で撹拌混合され、トレミー管５によって海底に打設される。
3 and 4 show an example in which a system for implementing the landfill method of the present invention is installed on a trolley, and the system of FIG. 1 is installed on a trolley 10 having a length of about 50 m and a width of 30 m. The tremy tube 5 is installed so as to reach the seabed from the trolley 10.
Box barges 70 and 71 carrying slag and dredged sand are placed on both sides of the carrier 10, and dredged sand and slag are thrown into the hopper 1 by a backhoe 6 that can be turned on the carrier 10. Then, as described above, the mixed soil is agitated and mixed by the pressure feed pipe 3 and the enlarged portion 31, and is placed on the seabed by the tremy pipe 5.
１ ホッパー
２ プラグ流発生装置
２１ 加圧ポンプ
３ 圧送管
３１ 拡径部
４ 減勢装置
５ トレミー管
６ バックホー
７０、７１ ボックスバージ
DESCRIPTION OF SYMBOLS 1 Hopper 2 Plug flow generator 21 Pressurization pump 3 Pumping pipe 31 Expanded diameter part 4 Reducer 5 Tremy pipe 6 Backhoe 70, 71 Box barge
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| JP2011204078A JP5155430B1 (en) | 2011-09-20 | 2011-09-20 | Improved dredged landfill method and equipment |
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| JP2011204078A JP5155430B1 (en) | 2011-09-20 | 2011-09-20 | Improved dredged landfill method and equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396710A (en) * | 2017-02-07 | 2018-08-14 | 吉裕建筑工程有限公司 | One kind sealing formula and fills out extra large method and fill out extra large device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02243830A (en) * | 1989-03-17 | 1990-09-27 | Ube Ind Ltd | High concentration dredging and discharging device |
| JPH06306888A (en) * | 1993-04-23 | 1994-11-01 | Ube Ind Ltd | Sludge force-feed conveyor |
| JP3069976B2 (en) * | 1991-10-23 | 2000-07-24 | 東亜建設工業株式会社 | Method of kneading mixed pressure sand and solidifying agent |
| JP2001220768A (en) * | 2000-02-08 | 2001-08-17 | Nittodaito Construction Co Ltd | Apparatus and method for producing improved soil |
| JP2005264657A (en) * | 2004-03-22 | 2005-09-29 | Nittoc Constr Co Ltd | Mud solidification processing method |
| JP2009002036A (en) * | 2007-06-21 | 2009-01-08 | Penta Ocean Construction Co Ltd | Mixing device for underwater placement pipe, and method of mixing interior of underwater placement pipe |
-
2011
- 2011-09-20 JP JP2011204078A patent/JP5155430B1/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02243830A (en) * | 1989-03-17 | 1990-09-27 | Ube Ind Ltd | High concentration dredging and discharging device |
| JP3069976B2 (en) * | 1991-10-23 | 2000-07-24 | 東亜建設工業株式会社 | Method of kneading mixed pressure sand and solidifying agent |
| JPH06306888A (en) * | 1993-04-23 | 1994-11-01 | Ube Ind Ltd | Sludge force-feed conveyor |
| JP2001220768A (en) * | 2000-02-08 | 2001-08-17 | Nittodaito Construction Co Ltd | Apparatus and method for producing improved soil |
| JP2005264657A (en) * | 2004-03-22 | 2005-09-29 | Nittoc Constr Co Ltd | Mud solidification processing method |
| JP2009002036A (en) * | 2007-06-21 | 2009-01-08 | Penta Ocean Construction Co Ltd | Mixing device for underwater placement pipe, and method of mixing interior of underwater placement pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396710A (en) * | 2017-02-07 | 2018-08-14 | 吉裕建筑工程有限公司 | One kind sealing formula and fills out extra large method and fill out extra large device |
| CN108396710B (en) * | 2017-02-07 | 2022-02-01 | 吉裕建筑工程有限公司 | Enclosed sea-filling method and sea-filling device |
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