JPH0678623B2 - Underwater construction method of artificial embankment or underwater structure - Google Patents
Underwater construction method of artificial embankment or underwater structureInfo
- Publication number
- JPH0678623B2 JPH0678623B2 JP1200042A JP20004289A JPH0678623B2 JP H0678623 B2 JPH0678623 B2 JP H0678623B2 JP 1200042 A JP1200042 A JP 1200042A JP 20004289 A JP20004289 A JP 20004289A JP H0678623 B2 JPH0678623 B2 JP H0678623B2
- Authority
- JP
- Japan
- Prior art keywords
- underwater
- manufacturing unit
- unit device
- aggregate
- water
- 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
- 238000010276 construction Methods 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 11
- 239000002734 clay mineral Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 5
- 238000004898 kneading Methods 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 2
- 239000004567 concrete Substances 0.000 description 17
- 239000000463 material Substances 0.000 description 7
- 239000002131 composite material Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Landscapes
- Underground Or Underwater Handling Of Building Materials (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、海洋土木分野における人工盛土又は水中構築
物の造成方法に関し、特に、港湾整備、沖合人工島、ウ
ォーターフロント等における人工地盤の造成方法に関す
る。TECHNICAL FIELD The present invention relates to a method for constructing an artificial embankment or an underwater structure in the field of marine civil engineering, and particularly to a method for constructing an artificial ground in port maintenance, offshore artificial islands, waterfronts, etc. Regarding
従来、水中における人工地盤の造成方法としては、いわ
ゆる水中コンクリート工法と埋立地盤工法の２つがあっ
た。Conventionally, there have been two methods for constructing artificial ground in water: the so-called underwater concrete method and the landfill method.
このうちプレパクトコンクリート工法、トレミー工法、
バケット工法等に代表される水中コンクリート工法は、
埋立地盤工法と比較して高強度の人工地盤を造成するこ
とができるので、造成すべき人工地盤の要求強度が高い
場合に適している。しかしながら、従来の水中コンクリ
ート工法では、コンクリートが材料分離し易く、又、ブ
リージングの発生する可能性があるため品質上の問題が
あった。また、水中でコンクリートを施工するため水質
汚染のおそれがあり環境保全上の問題があった。Of these, the pre-pact concrete method, the tremie method,
The underwater concrete construction method represented by the bucket construction method is
Since it is possible to construct artificial ground with higher strength than the landfill method, it is suitable when the required strength of the artificial ground to be constructed is high. However, in the conventional underwater concrete construction method, there is a problem in quality because concrete is easily separated from the material and breathing may occur. In addition, since concrete is constructed in water, there is a risk of water pollution, which is a problem in terms of environmental protection.
従来の水中コンクリート工法におけるかかる問題を解決
するため開発された工法として、特殊水中コンクリート
工法がある。この工法は、水溶性高分子系の特殊混和剤
をコンクリートに添加してセメント、骨材を粘着させる
もので、水の洗い作用を受けても材料分離の極めて少な
い均質なコンクリートが得られる。しかしながら、特殊
水中コンクリート工法は、コストが高いという欠点があ
った。A special underwater concrete method is a method developed to solve such problems in the conventional underwater concrete method. In this method, a special admixture of water-soluble polymer is added to concrete to adhere the cement and the aggregate, and homogeneous concrete with very little material separation even when subjected to washing action with water can be obtained. However, the special underwater concrete method has a drawback of high cost.
さらに、特殊水中コンクリート工法を含めた従来の水中
コンクリート工法に共通する欠点として、空気中でコン
クリートを製造して海底部までポンプ圧送したりトレミ
ー管で搬送したりするため、製造能力、搬送能力に制約
があり、大量施工、低コスト化には不向きであった。Furthermore, as a disadvantage common to conventional underwater concrete construction methods including special underwater concrete construction method, since concrete is manufactured in the air and pumped to the sea bottom or transported by tremie pipe, the manufacturing capacity and transportation capacity are reduced. Due to restrictions, it was not suitable for mass construction and cost reduction.
一方、埋立地盤工法は水中コンクリート工法と比較して
廉価であるという利点があるが、低強度であるので地震
時に地盤が液状化するおそれがある。On the other hand, the landfill method is advantageous in that it is cheaper than the underwater concrete method, but it has low strength, so the ground may be liquefied during an earthquake.
本発明は上述の従来技術の欠点を解消するために考案さ
れたものであり、従来の水中コンクリート工法で得られ
る程の強度は必要ないが液状化に対して抵抗性の高い人
工地盤の造成に適用するのに特に適している。The present invention was devised in order to solve the above-mentioned drawbacks of the prior art, and it is not necessary to have the strength as obtained by the conventional underwater concrete method, but for the construction of an artificial ground having high resistance to liquefaction. Especially suitable for application.
従来技術における上述の課題を解決するために、本発明
により、スラリー化された骨材と粘土鉱物及び水硬性組
成物とを、それぞれ別の管により、水中に配置された製
造用ユニット装置まで搬送し、前記の骨材と粘土鉱物及
び水硬性組成物とを、製造用ユニット装置内部に設けら
れた複数段の攪拌手段で混練し、製造用ユニット装置の
下方部分に水平方向に設けられたスクリューコンベアに
よって、混練物を搬送し、前記スクリューコンベアの先
端に設けられた混練物吐出口を所望の位置に移動させ、
製造された混練物を所望の箇所に吐出することを特徴と
する人工盛土又は水中構築物の水中造成工法が提供され
る。In order to solve the above-mentioned problems in the prior art, according to the present invention, a slurried aggregate and a clay mineral and a hydraulic composition are conveyed by separate pipes to a manufacturing unit device arranged in water. Then, the aggregate and the clay mineral and the hydraulic composition are kneaded by a plurality of stages of stirring means provided inside the manufacturing unit device, and a screw horizontally provided in the lower portion of the manufacturing unit device. By the conveyor, convey the kneaded product, move the kneaded product discharge port provided at the tip of the screw conveyor to a desired position,
There is provided an underwater construction method for an artificial embankment or an underwater structure, which comprises discharging the manufactured kneaded product to a desired location.
第１図には、本発明の水中造成工法の全体概略図が示さ
れている。FIG. 1 shows an overall schematic view of the underwater construction method of the present invention.
第１図に従って、本発明の水中造成工法の全体について
説明する。水上の作業台船１には、骨材を貯留するため
の骨材貯留用ホッパ２が設置されており、ホッパ２の下
部には骨材排出口３が取付けられている。この骨材排出
口３には、水中の骨材散布装置６まで延びた骨材輸送管
４が連結されている。又、この輸送管４には、骨材スラ
リー化装置５が連結されており、該装置５でスラリー化
された骨材が骨材散布装置６まで搬送される。The entire underwater construction method of the present invention will be described with reference to FIG. An aggregate storage hopper 2 for storing aggregates is installed on the work platform 1 on the water, and an aggregate discharge port 3 is attached to a lower portion of the hopper 2. The aggregate discharge port 3 is connected to an aggregate transport pipe 4 that extends to an underwater aggregate spraying device 6. An aggregate slurry making device 5 is connected to the transport pipe 4, and the aggregate made into a slurry by the device 5 is conveyed to an aggregate spraying device 6.
骨材散布装置６の下部には、複合材料の混練物を製造す
るための製造用ユニット装置７が連結されている。A manufacturing unit device 7 for manufacturing a kneaded material of a composite material is connected to a lower portion of the aggregate-dispersing device 6.
なお、第１図において、実線で示した製造用ユニット装
置は水中に降ろされた状態を、鎖線で示した製造用ユニ
ット装置は水中に上げた状態をそれぞれ示している。In FIG. 1, the manufacturing unit device shown by the solid line shows the state of being lowered into water, and the manufacturing unit device shown by the chain line shows the state of being raised underwater.
次に第２図及び第３図を参照して、製造用ユニット装置
７の詳細について説明する。Next, the details of the manufacturing unit device 7 will be described with reference to FIGS. 2 and 3.
製造用ユニット装置７は、搬送された骨材を骨材散布装
置６から受け入れるための水中部ホッパ11と、該ホッパ
11の下部に位置決めされた撹拌手段12と、撹拌手段12か
らの複合材料の混練物の吐出を制御するためのスライド
ゲート13と、複合材料の混練物を吐出するためのスクリ
ューコンベヤ14とを有し、スクリューコンベヤの先端に
は吐出口15が設けられている。撹拌手段12は撹拌翼から
なり、複合材料の混練時間を確保するため、複数段（第
２図及び第３図では３段）の撹拌翼から構成されてい
る。また、スクリューコンベヤ14は、吐出口からの水の
侵入を防止するため所定の長さを有しており、吐出口15
には先端蓋16が取付けられている。The manufacturing unit device 7 includes an underwater hopper 11 for receiving the transported aggregate from the aggregate dispersal device 6, and the hopper.
An agitating means 12 positioned at the lower part of 11, a slide gate 13 for controlling the discharge of the kneaded material of the composite material from the agitating means 12, and a screw conveyor 14 for discharging the kneaded material of the composite material are provided. However, a discharge port 15 is provided at the tip of the screw conveyor. The stirring means 12 is composed of stirring blades, and is composed of a plurality of stages (three stages in FIGS. 2 and 3) of stirring blades in order to secure the kneading time of the composite material. The screw conveyor 14 has a predetermined length to prevent water from entering through the discharge port.
A tip lid 16 is attached to the.
一方、水上のプラント船（図示せず）から、製造用ユニ
ット装置７の水中部ホッパ11の下部まで、水硬性組成物
及び粘土鉱物を供給するための管８が延びている。水硬
性組成物としては、ポルトランドセメント、混合セメン
ト、超速硬性セメント等があげられる。又、粘土鉱物と
しては、ベントナイト等があげられる。On the other hand, a pipe 8 for supplying the hydraulic composition and the clay mineral extends from a plant ship (not shown) on the water to a lower part of the underwater hopper 11 of the manufacturing unit device 7. Examples of hydraulic compositions include Portland cement, mixed cement, and ultra-rapid setting cement. Examples of clay minerals include bentonite.
次に、本発明の方法を使用して水中に人工地盤を造成す
る施工手順について説明する。Next, the construction procedure for constructing artificial ground in water using the method of the present invention will be described.
まず、製造用ユニット装置７を水上に上げ、先端蓋16を
閉じた状態でスクリューコンベヤ14に、製造すべき混練
生成物の品質とほぼ同等の品質の混練生成物を充填す
る。次いで、製造用ユニット装置７のスライドゲート13
を閉鎖した後、製造用ユニット装置７を人工地盤を造成
すべき水底部付近に降ろす。次いで、骨材を水中部ホッ
パ11の所定位置まで貯留する。次いで、スラリー化した
骨材と粘土鉱物及び水硬性組成物とを、作業台船１とプ
ラント船からそれぞれ搬送し、水中部ホッパ11に投入し
て、複数段の撹拌翼で混練する。次いで、先端蓋16を開
放して複合材料の混練物を吐出する。以上の作業を繰り
返して、所望の個所に所望の量の複合材料の混練物を吐
出する。しかる後、作業台船１の位置および製造用ユニ
ット装置７の高さを調節することにより吐出口の位置を
移動させ、かくして、所望の位置に自由に人工地盤を形
成することができる。First, the manufacturing unit device 7 is raised above the water, and the screw conveyor 14 is filled with the kneaded product having substantially the same quality as the kneaded product to be manufactured with the tip lid 16 closed. Next, the slide gate 13 of the manufacturing unit device 7
After closing, the manufacturing unit device 7 is lowered near the water bottom where the artificial ground is to be constructed. Next, the aggregate is stored up to a predetermined position in the underwater hopper 11. Next, the slurried aggregate, the clay mineral, and the hydraulic composition are respectively conveyed from the work platform ship 1 and the plant ship, put into the underwater hopper 11, and kneaded by a plurality of stages of stirring blades. Next, the tip lid 16 is opened and the kneaded material of the composite material is discharged. By repeating the above operation, a desired amount of the kneaded material of the composite material is discharged to a desired location. After that, the position of the discharge port can be moved by adjusting the position of the work platform 1 and the height of the manufacturing unit device 7, and thus, the artificial ground can be freely formed at a desired position.
以上説明したように、本発明を使用することにより水中
内での固化組成物の分離・拡散が極めて少なくなるた
め、混練生成物の強度低下が防止されるとともに水質汚
染のおそれが殆どなくなる。また、製造用ユニット装置
内で連続して混練することができるので大量施工が可能
になり、特殊水中コンクリート工法の高分子分離抵抗剤
を使用しないため低コストで施工することができる。ま
た、製造用ユニット装置が作業台船と連結されているの
で、水面上で製造用ユニット装置を操作することにより
所望の位置に自由に人工地盤を形成することができる。
さらに、製造された人工盛土や水中構築物は、地震時の
液状化に対して抵抗性がある。As described above, by using the present invention, the separation and diffusion of the solidified composition in water is extremely reduced, so that the strength of the kneaded product is prevented from lowering and there is almost no risk of water pollution. Further, since the kneading can be continuously carried out in the manufacturing unit device, a large amount of work can be performed, and since the polymer separation resistance agent of the special underwater concrete method is not used, the work can be performed at low cost. Further, since the manufacturing unit device is connected to the work pontoon, the artificial ground can be freely formed at a desired position by operating the manufacturing unit device on the water surface.
In addition, the manufactured artificial fills and underwater structures are resistant to liquefaction during earthquakes.
本発明は以上のような効果を奏するものであり、海洋土
木分野における人工盛土、水中構築物の造成において、
広い利用が期待されるものである。The present invention has the effects as described above, in the creation of artificial embankment, underwater structure in the field of marine civil engineering,
It is expected to be widely used.
第１図は本発明の水中造成工法の全体概略図、第２図は
製造用ユニット装置の正面図、第３図は製造用ユニット
装置の側面図（先端蓋を閉じた状態）である。FIG. 1 is an overall schematic view of the underwater construction method of the present invention, FIG. 2 is a front view of a manufacturing unit device, and FIG. 3 is a side view of the manufacturing unit device (with the tip lid closed).
Claims (4)
性組成物とを、それぞれ別の管により、水中に配置され
た製造用ユニット装置まで搬送し、前記の骨材と粘土鉱
物及び水硬性組成物とを、製造用ユニット装置内部に設
けられた複数段の攪拌手段で混練し、製造用ユニット装
置の下方部分に水平方向に設けられたスクリューコンベ
アによって、混練物を搬送し、前記スクリューコンベア
の先端に設けられた混練物吐出口を所望の位置に移動さ
せ、製造された混練物を所望の箇所に吐出することを特
徴とする人工盛土又は水中構築物の水中造成工法。1. An aggregate, a clay mineral and a hydraulic composition which are slurried are conveyed by separate pipes to a manufacturing unit device arranged in water, and the aggregate, the clay mineral and the water are conveyed. The hard composition and, by kneading with a plurality of stages of stirring means provided inside the manufacturing unit device, by a screw conveyor horizontally provided in the lower portion of the manufacturing unit device, convey the kneaded product, the screw An underwater construction method for an artificial embankment or an underwater structure, characterized in that a kneaded product discharge port provided at the tip of a conveyor is moved to a desired position and the manufactured kneaded product is discharged to a desired location.
ることを特徴とする請求項１記載の方法。2. The method of claim 1, wherein the hydraulic composition is Portland cement.
特徴とする請求項１記載の方法。3. The method of claim 1 wherein the hydraulic composition is a mixed cement.
とを特徴とする請求項１記載の方法。4. The method according to claim 1, wherein the hydraulic composition is a super rapid hardening cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1200042A JPH0678623B2 (en) | 1989-08-01 | 1989-08-01 | Underwater construction method of artificial embankment or underwater structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1200042A JPH0678623B2 (en) | 1989-08-01 | 1989-08-01 | Underwater construction method of artificial embankment or underwater structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0363315A JPH0363315A (en) | 1991-03-19 |
| JPH0678623B2 true JPH0678623B2 (en) | 1994-10-05 |
Family
ID=16417864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1200042A Expired - Lifetime JPH0678623B2 (en) | 1989-08-01 | 1989-08-01 | Underwater construction method of artificial embankment or underwater structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0678623B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7616604B2 (en) * | 2021-06-30 | 2025-01-17 | Ｕｂｅ三菱セメント株式会社 | Installation Method |
| JP2023006589A (en) * | 2021-06-30 | 2023-01-18 | Ｕｂｅ三菱セメント株式会社 | hydraulic composition |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01250527A (en) * | 1988-03-31 | 1989-10-05 | Sumitomo Constr Co Ltd | Casting method for earth or the like into water |
-
1989
- 1989-08-01 JP JP1200042A patent/JPH0678623B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0363315A (en) | 1991-03-19 |
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