JP2737035B2 - Slime treatment method for cement-based grout for ground improvement - Google Patents
Slime treatment method for cement-based grout for ground improvementInfo
- Publication number
- JP2737035B2 JP2737035B2 JP21718191A JP21718191A JP2737035B2 JP 2737035 B2 JP2737035 B2 JP 2737035B2 JP 21718191 A JP21718191 A JP 21718191A JP 21718191 A JP21718191 A JP 21718191A JP 2737035 B2 JP2737035 B2 JP 2737035B2
- Authority
- JP
- Japan
- Prior art keywords
- slime
- cement
- grout material
- treatment method
- ground improvement
- 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
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は地盤改良用セメント系グ
ラウト材におけるスライム処理方法に係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating slime in a cement-based grout material for ground improvement.
【０００２】[0002]
【従来の技術】セメント系グラウト材を砂礫層に噴射
し、同層とグラウト材とを混合固化せしめるコラムジエ
ットグラウト工法（ＣＪＧ工法）の如き地盤改良工法に
おいては、前記グラウト材噴射時に地上に噴出するセメ
ント系スライムをノッチタンクに収容し、翌日、硬化し
たものをバックホウによって掘削してダンプトラックに
積込み搬出するのが普通である。2. Description of the Related Art In a ground improvement method such as a column jet grout method (CJG method) in which a cement grout material is sprayed onto a gravel layer and the same layer and the grout material are mixed and solidified, the grout material is ejected to the ground at the time of the grout material injection. It is common practice to put the cement-based slime into a notch tank, excavate the hardened material the next day with a backhoe, load it on a dump truck and carry it out.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら休日前の
作業、例えば土曜日の作業では、翌々日（月曜日）には
セメント系スライムの固化が進みすぎるので、作業日の
当日中にバキューム車で処理するのでコストが嵩む。あ
るいはまた作業日の翌々日に、固化したスライムを斫り
ながらバックホウで積込む方法もあるが、固化したセメ
ント系のスライムの斫り作業は地元の要望により協議、
許可等に時間がかかり、問題が多かった。However, in the work before the holiday, for example, on the work on Saturday, the solidification of the cement slime progresses too much on the next day (Monday). Increases. Alternatively, on the second day after the work day, there is a method of loading with a backhoe while cutting the solidified slime.However, the cutting operation of the solidified cement slime is negotiated according to local requests,
Permission took time and there were many problems.
【０００４】このため本発明者等は、前記スライムの固
化を、中１日置いても進行させない方法として、生コン
クリート用の遅延剤の使用を試みたが、同遅延剤は高価
で、且つ２４時間以内位の効果しかなく、またその後は
確実に強度が発現されるという問題点があった。本発明
は前記従来技術の有する問題点に鑑みて提案されたもの
で、その目的とする処は、作業性が向上され、経済性が
改善された地盤改良用セメント系グラウト材におけるス
ライム処理方法を提供する点にある。Therefore, the present inventors have attempted to use a retarder for ready-mixed concrete as a method for preventing the slime from solidifying even after one day, but the delay agent is expensive and requires 24 hours. There is a problem that the effect is only within about an hour, and thereafter, the strength is reliably developed. The present invention has been proposed in view of the problems of the prior art described above, and its object is to improve the workability and improve the economic efficiency of a slime treatment method for a cement-based grout material for ground improvement. The point is to provide.
【０００５】[0005]
【課題を解決するための手段】前記の目的を達成するた
め、本発明に係る地盤改良用セメント系グラウト材にお
けるスライム処理方法によれば、前記グラウト材の噴射
時に地上に噴出するスライムをタンクに収容するととも
に、凝集剤を混合するものである。In order to achieve the above object, according to the slime treatment method for a cement-based grout material for ground improvement according to the present invention, slime ejected to the ground when the grout material is ejected is supplied to a tank. While containing, a coagulant is mixed.
【０００６】[0006]
【作用】本発明によれば前記したように、セメント系グ
ラウト材を砂礫層に噴射したときに地上に噴出するセメ
ント系スライムに、凝集剤を混合し、その除濁効果を利
用して前記スライムの固化及び強度の促進を鈍化させる
ものである。According to the present invention, as described above, a coagulant is mixed with a cement-based slime ejected to the ground when a cement-based grout material is ejected onto a gravel layer, and the slime is utilized by utilizing its turbidity effect. This slows down the solidification and promotion of strength.
【０００７】[0007]
【実施例】以下本発明を実施例について説明する。グラ
ウト１ｍ3 に対してセメント７６０Ｋｇ、減水剤１２Ｋ
ｇを水で混練したグラウト材を砂礫質層に噴射して、同
砂礫質層とグラウト材とを混合、固化させる。The present invention will be described below with reference to examples. 760 kg of cement and 12 K of water reducing agent for 1 m 3 of grout
The grout material obtained by kneading g with water is sprayed onto the gravel layer to mix and solidify the gravel layer and the grout material.
【０００８】前記グラウト材の噴射時に地上に噴出する
スライムを、一時ノッチタンクに収容する。而して都合
により同スライムを適当な時期に搬出できない場合、前
記スライムはコンクリート状に硬化してしまうので、処
理時までに硬化しないように前記タンクに収容した時
に、ポリ塩化アルミニウムよりなる凝集剤を、前記スラ
イム２０ｍ3 に対して６０ｌの割合で添加、攪拌するこ
とによって、セメント、骨材、水に分離せしめて、スラ
イムの凝固を遅延させ、固化強度の促進を鈍化せしめる
ことによって、スライム処理の作業性が非常に良く、搬
出効率が向上された。[0008] The slime ejected to the ground when the grout material is ejected is temporarily stored in a notch tank. If the slime cannot be carried out at an appropriate time due to circumstances, the slime hardens into a concrete shape, so that when the slime is stored in the tank so as not to harden by the time of processing, a coagulant made of polyaluminum chloride is used. Is added to the slime at a rate of 60 liters with respect to 20 m 3 of the slime, and the mixture is stirred to separate it into cement, aggregate, and water, thereby delaying the solidification of the slime and slowing the promotion of the solidification strength. The workability was very good, and the unloading efficiency was improved.
【０００９】実験の結果、施工後２日目のスライムの積
込において、バックホウで掘削するのに、固化の状態は
普通で、強度が減少していて作業性がよく、スライムの
積込、運搬が効果的に行なわれた。なお前記凝集剤とし
ては、硫酸ばん土、塩化第２鉄を使用しても同様な効果
が得られた。また前記各無機凝集剤にポリアクリルアミ
ド等の高分子材料を添加すると更に良好な結果が得られ
た。As a result of the experiment, in loading the slime on the second day after the construction, the solidification state is normal, the strength is reduced, the workability is good, and the slime is loaded and transported, even though it is excavated with a backhoe. Was effectively done. Similar effects were obtained by using sodium sulfate or ferric chloride as the coagulant. When a polymer material such as polyacrylamide was added to each of the inorganic coagulants, better results were obtained.
【００１０】なお凝集剤の添加量は、改良地盤の土質に
よりグラウト材の配合が異るので、予め改良地盤のサン
プルによって、グラウト材の配合と、その固化遅延状況
を勘案して、決定される。[0010] The amount of the coagulant to be added is determined depending on the composition of the grout material and the delay of solidification of the grout material in advance by using a sample of the improved ground because the composition of the grout material varies depending on the soil properties of the improved ground. .
【００１１】[0011]
【発明の効果】本発明によれば前記したように、砂礫層
にセメント系グラウト材を噴射する際に、地上に噴出す
るスライムに凝集剤を混合し、同スライムの固化、及び
強度の促進を鈍化させることによって、同スライムの処
理の作業性の向上と、経済性の改善を図ることができ
る。According to the present invention, as described above, when a cement-based grout material is sprayed on a gravel layer, a coagulant is mixed with the slime ejected on the ground to solidify the slime and promote the strength. By slowing down, it is possible to improve the workability of the slime treatment and the economic efficiency.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ // Ｃ０４Ｂ 103:22 ──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. 6 Identification code FI // C04B 103: 22
Claims (1)
る地盤改良工法において、前記グラウト材の噴射時に地
上に噴出するスライムをタンクに収容するとともに、凝
集剤を混合することを特徴とする地盤改良用セメント系
グラウト材におけるスライム処理方法。1. A soil improvement method for injecting a cement grout material into a gravel layer, wherein the slime ejected to the ground at the time of injecting the grout material is accommodated in a tank and a coagulant is mixed. Slime treatment method for cement grout materials
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21718191A JP2737035B2 (en) | 1991-08-28 | 1991-08-28 | Slime treatment method for cement-based grout for ground improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21718191A JP2737035B2 (en) | 1991-08-28 | 1991-08-28 | Slime treatment method for cement-based grout for ground improvement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0559718A JPH0559718A (en) | 1993-03-09 |
| JP2737035B2 true JP2737035B2 (en) | 1998-04-08 |
Family
ID=16700135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21718191A Expired - Fee Related JP2737035B2 (en) | 1991-08-28 | 1991-08-28 | Slime treatment method for cement-based grout for ground improvement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2737035B2 (en) |
-
1991
- 1991-08-28 JP JP21718191A patent/JP2737035B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0559718A (en) | 1993-03-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |