JPH0676693B2 - Lightweight embankment material for underwater construction - Google Patents
Lightweight embankment material for underwater constructionInfo
- Publication number
- JPH0676693B2 JPH0676693B2 JP63179497A JP17949788A JPH0676693B2 JP H0676693 B2 JPH0676693 B2 JP H0676693B2 JP 63179497 A JP63179497 A JP 63179497A JP 17949788 A JP17949788 A JP 17949788A JP H0676693 B2 JPH0676693 B2 JP H0676693B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- lightweight embankment
- embankment material
- underwater construction
- reducing agent
- 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
Landscapes
- Underground Or Underwater Handling Of Building Materials (AREA)
Description
【発明の詳細な説明】 （発明が属する技術分野） 本発明は水中施工用の軽量盛土材に関するものである。Description: TECHNICAL FIELD The present invention relates to a lightweight embankment material for underwater construction.
（従来技術） 粘性土と水と固化材と起泡剤とを攪拌混合して成る軽量
盛土材は既知であるが、これまで、その用途は専ら、宅
地造成地や道路等の盛土、裏込め、空洞充填等の陸上用
に限られており、水中施工には用いられていない。(Prior art) A lightweight embankment material is known, which is formed by stirring and mixing cohesive soil, water, a solidifying material, and a foaming agent, but until now, its use has been exclusively for embankment and backfilling of residential land reclamation sites and roads. It is limited to land use, such as cavity filling, and is not used for underwater construction.
その理由は、前述の材料を攪拌混合して成る軽量盛土材
中に大量に（全体積の１〜２割程度）発生する気泡を水
中で保持することが不可能視されていたからである。The reason is that it has been considered impossible to hold a large amount of air bubbles (about 10 to 20% of the total volume) generated in the lightweight embankment material obtained by stirring and mixing the aforementioned materials in water.
（発明の目的と構成） 本発明は、気泡が水中で逸出されずに確実に保持される
水中施工用軽量盛土材を提供することを目的としている
ものであって、その構成上の特徴は特許請求の範囲に記
載したとおりである。(Object and Configuration of the Invention) The present invention is intended to provide a lightweight embankment material for underwater construction in which air bubbles are reliably retained without escape in water, and the features of the configuration are As described in the claims.
（発明の具体的説明） 本発明の水中施工用盛土材は、粘性土と水と固化材材と
から成る従来の陸上施工用の軽量盛土材に、例えば水溶
性高分子セルロースエーテルのような分離低減剤と例え
ばメラミンスルフォン酸塩のような流動化剤とを加えて
攪拌混合したもので、その配合の一例を示せば次のとお
りである。(Detailed Description of the Invention) The embankment material for underwater construction of the present invention is a lightweight embankment material for conventional land construction, which is composed of cohesive soil, water and a solidifying material, and is separated by, for example, a water-soluble polymer cellulose ether. A reducing agent and a fluidizing agent such as melamine sulfonate are added and mixed with stirring. An example of the blending is as follows.
粘性土 500 kg/m3 水 500 〃 固化剤 150 〃 起泡剤 0.23 〃 分離低減剤 0.50 〃 流動化剤 1.50 〃 本発明者らが、従来の陸上施工用軽量盛土材にコンクリ
ートの分離低減剤として知られている水溶性高分子セル
ロースエーテルを加えたものの水中における性状を調べ
たところ、分離低減剤の量が１m3当たり0.5kg以上のと
きに、気泡の水中逸出がなく、水質汚濁防止法で規定す
る水の濁度150ppm以下という基準が満たされ、強度も十
分であることが判った。Cohesive soil 500 kg / m 3 Water 500 〃 Solidifying agent 150 〃 Foaming agent 0.23 〃 Separation reducing agent 0.50 〃 Superplasticizer 1.50 〃 The present inventors When the properties of known water-soluble high molecular weight cellulose ethers were investigated in water, when the amount of the separation reducing agent was 0.5 kg / m 3 or more, no bubbles escaped in the water and the water pollution control method It was found that the water turbidity of 150 ppm or less specified in 1 was satisfied, and the strength was sufficient.
これは粘性土の粘性と分離低減剤の作用とにより気泡が
水中で保持されるためと考えられが、分離低減剤の量を
増やすと、流動性が低下して水中の施工性が悪くなり、
しかも、分離低減剤は高価なので、分離低減剤の量を必
要以上に増やすのは不利であり、そのため、本発明では
分離低減剤の添加量を１m3当たり0.5kgに限定した。It is thought that this is because the bubbles are retained in water by the viscosity of the cohesive soil and the action of the separation reducing agent, but if the amount of the separation reducing agent is increased, the fluidity decreases and the workability in water deteriorates,
Moreover, since the separation reducing agent is expensive, it is disadvantageous to increase the amount of the separation reducing agent more than necessary. Therefore, in the present invention, the addition amount of the separation reducing agent is limited to 0.5 kg per 1 m 3 .
流動化材は、軽量盛土材の流動性を高めてその水中施工
性を良好にするために添加するものであり、本発明の水
中施工用軽量盛土材は、水中に挿入した投入管（シュー
ト）内を自然流下させて投入管の下端から吐出させるこ
とにより、簡単に水底に堆積させることができる。The fluidizing material is added to enhance the fluidity of the lightweight embankment material and improve its underwater workability, and the lightweight embankment material for underwater construction of the present invention is a throwing pipe (chute) inserted in water. By letting the inside flow down naturally and discharging from the lower end of the input pipe, it is possible to easily deposit on the water bottom.
（発明の効果） 本発明の水中施工用軽量盛土材は、以上のようなもので
あって、必要最小限の分離低減剤の使用で気泡が水中で
確実に保持されるので、従来は不可能とされていた軽量
盛土材の水中施工が経済的に可能となり、また、施工性
も良好であり、これを用いることにより軽量盛土材によ
る水中盛土を容易かつ経済的に行うことができる。(Effects of the Invention) The lightweight embankment material for underwater construction of the present invention is as described above, and since the bubbles are reliably retained in water by using the minimum necessary separation reducing agent, it is conventionally impossible. Underwater construction of the lightweight embankment, which was said to be possible, is economically possible, and the workability is also good. By using this, underwater embankment with the lightweight embankment can be performed easily and economically.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−55325（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-55325 (JP, A)
Claims (1)
と流動化剤とを攪拌混合して成り、分離低減剤の使用量
が１m3当たり0.5kgであることを特徴とする水中施工用
軽量盛土材。1. A method comprising stirring and mixing cohesive soil, water, a solidifying material, a foaming agent, a separation reducing agent and a fluidizing agent, and the amount of the separation reducing agent used is 0.5 kg per 1 m 3. Lightweight embankment material for underwater construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63179497A JPH0676693B2 (en) | 1988-07-19 | 1988-07-19 | Lightweight embankment material for underwater construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63179497A JPH0676693B2 (en) | 1988-07-19 | 1988-07-19 | Lightweight embankment material for underwater construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0230812A JPH0230812A (en) | 1990-02-01 |
| JPH0676693B2 true JPH0676693B2 (en) | 1994-09-28 |
Family
ID=16066856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63179497A Expired - Fee Related JPH0676693B2 (en) | 1988-07-19 | 1988-07-19 | Lightweight embankment material for underwater construction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0676693B2 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50122036A (en) * | 1974-03-13 | 1975-09-25 | ||
| JPS5240525A (en) * | 1975-09-29 | 1977-03-29 | Kajima Corp | Method for production of air mortar |
| JPS59190245A (en) * | 1983-04-07 | 1984-10-29 | 住友化学工業株式会社 | Cement fluidizing composition |
| JPS61232255A (en) * | 1985-04-08 | 1986-10-16 | 株式会社 オカニシ | Concrete for cloth mold frame |
| JPH0660496B2 (en) * | 1985-09-02 | 1994-08-10 | 株式会社大林組 | How to put soil into water |
| JPS62158177A (en) * | 1985-12-27 | 1987-07-14 | 東邦パ−ライト株式会社 | Cencrete material for construction and public work |
| JPS6360175A (en) * | 1986-08-29 | 1988-03-16 | 小野田エー・エル・シー株式会社 | Lightweight mortar |
-
1988
- 1988-07-19 JP JP63179497A patent/JPH0676693B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0230812A (en) | 1990-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5294255A (en) | Pumpable backfill grout | |
| DE60009468T2 (en) | PROMOTION OF SOLID PARTICLES | |
| Kim et al. | Prevention of air void formation in polymer-modified cement mortar by pre-wetting | |
| JP3955255B2 (en) | Ground improvement cement composition additive, ground improvement cement composition and ground improvement method using the same | |
| KR100241874B1 (en) | Concrete composition having high flowability | |
| JP2728846B2 (en) | Fluidization method | |
| JP3421450B2 (en) | Shield excavation method in shield tunnel excavation method | |
| JP3739823B2 (en) | Cellular foam mortar filling material | |
| JPH0676693B2 (en) | Lightweight embankment material for underwater construction | |
| SK278384B6 (en) | Manufacturing process of underground tightening wall | |
| JPH10236862A (en) | Backfilling material | |
| JP6502812B2 (en) | Bubble shield method | |
| JPH07232148A (en) | Solidifying agent for treating surplus soil and surplus soil solidification treatment using the same | |
| JP3435122B2 (en) | Plastic injection material | |
| JP2006274765A (en) | Plastic grout made by using ready-mixed concrete sludge and plastic grouting method | |
| JP2843885B2 (en) | Mortar material | |
| JP3502306B2 (en) | Plastic injection material | |
| JP3677090B2 (en) | Cavity filling material | |
| JPS58176155A (en) | Preparation of grout material for cavity filling | |
| JP2020033207A (en) | Underwater inseparable mortar composition and mortar thereof | |
| JP3219276B2 (en) | Grout for injection based on cement | |
| JP3151121B2 (en) | Method of manufacturing dam concrete | |
| JPH057706A (en) | Coagulant for civil engineering | |
| JP2001302315A (en) | Backfill material | |
| JPH05106224A (en) | Light weight backfilling material for execution of work in water, and its placing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |