JPH11323322A - Self-dispersive molding excavation stabilizing solution and preparation of excavation stabilizing solution and method for recovery - Google Patents
Self-dispersive molding excavation stabilizing solution and preparation of excavation stabilizing solution and method for recoveryInfo
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- JPH11323322A JPH11323322A JP13401098A JP13401098A JPH11323322A JP H11323322 A JPH11323322 A JP H11323322A JP 13401098 A JP13401098 A JP 13401098A JP 13401098 A JP13401098 A JP 13401098A JP H11323322 A JPH11323322 A JP H11323322A
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- Prior art keywords
- excavation
- self
- stabilizing solution
- molding
- dispersive
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、場所打ち杭工法や
地中連続壁工法などで使用される掘削安定液の調製、機
能回復に用いられる薬剤に関する。さらに詳しくは本発
明は、自己分散性で、攪拌しなくとも安定液の調製、回
復を行うことができ、取扱いの容易な自己分散型成形掘
削安定液材、並びに該掘削安定液材を使用した掘削安定
液の調製方法及び回復方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical used for preparing a drilling stabilizing solution and recovering its function for use in a cast-in-place pile method, an underground continuous wall method, and the like. More specifically, the present invention is a self-dispersible, self-dispersible molded excavation stabilizing liquid material that can be prepared and recovered without stirring, and can be easily handled without using agitation. The present invention relates to a preparation method and a recovery method of a drilling stable liquid.
【０００２】[0002]
【従来の技術】場所打ち杭工法や地中連続壁工法などに
おいて、地盤掘削時の孔壁の安定化、さらには掘削土砂
の地上への搬出媒体としての機能を目的として、掘削安
定液が使用されている。従来用いられている掘削安定液
は、ベントナイト、水溶性高分子などを水に懸濁、溶解
させてなる粘土コロイドの分散懸濁液である。その調製
は、計量したベントナイト、増粘剤、分散剤、逸泥防止
剤などの各成分を、それぞれ個別に、混合機や攪拌機な
どに投入又は吸引させて、水に混合分散させていく方法
がとられている。このようにすることで目的とする性質
を有する安定液が得られるが、これらの各成分を順次分
散、溶解しなければならないために、調製作業に時間が
かかるという問題があった。また、上記のように混合、
分散には攪拌機などの動力による強制的な攪拌を要し、
人手や時間を要し、掘削安定液調製のために機械、設備
の設置が必要であった。また、掘削安定液の各成分は多
くが粉体であるため、取扱い時に粉塵が発生し、人体へ
の悪影響（肌荒れや炎症など）や環境汚染が生ずるなど
の問題があった。さらに、掘削安定液の各原料が嵩高
く、紙袋パレットやマイコンバッグでの取扱いのために
保管スペースをとること、材料の投入量をそれぞれ計量
しなければならないことなどのため、安定液調製、管理
のための人員を常時配置しなければならないという問題
もあった。2. Description of the Related Art In a cast-in-place pile method or an underground continuous wall method, a drilling stabilizing liquid is used for the purpose of stabilizing a hole wall during ground excavation and also functioning as a medium for carrying excavated earth and sand to the ground. Have been. The conventionally used excavation stabilizer is a clay colloid dispersion suspension in which bentonite, a water-soluble polymer and the like are suspended and dissolved in water. For the preparation, each component such as a measured bentonite, a thickener, a dispersant, a sludge preventive agent is individually charged or sucked into a mixer or a stirrer, and mixed and dispersed in water. Has been taken. By doing so, a stable liquid having the desired properties can be obtained, but there has been a problem that it takes a long time for the preparation work because these components must be sequentially dispersed and dissolved. Also, mixing as above,
Dispersion requires forced stirring by the power of a stirrer, etc.
It required manpower and time, and required the installation of machinery and equipment to prepare the stable drilling fluid. In addition, since many components of the drilling stabilizing solution are powders, dust is generated during handling, and there are problems such as adverse effects on the human body (such as rough skin and inflammation) and environmental pollution. In addition, since the raw materials of the excavation stabilizer are bulky, the storage space is required for handling on paper bag pallets and microcomputer bags, and the amount of material input must be measured separately. There was also a problem that personnel for the maintenance had to be constantly deployed.
【０００３】また掘削安定液は、使用中に、掘削孔内
で、凝集性イオンの影響などにより、粘度や濾水量の上
昇などの劣化を生ずる。このような安定液の性状の劣化
は、造壁性の不良をきたしたり工体への悪影響を及ぼし
たりするため、劣化した安定液を地上の貯蔵タンクに回
収した後、機能回復の処置をしたり新鮮な安定液と置換
したりして、掘削孔内の安定液の機能回復を行う必要が
あった。しかし、劣化液の回収には時間と設備を要する
ため、掘削孔内で掘削安定液の機能回復を行いうる方法
の開発が要望されていた。[0003] In addition, during use, the excavation stabilizing liquid is deteriorated in the borehole due to the influence of coagulating ions and the like, such as an increase in viscosity and drainage amount. Such deterioration of the properties of the stabilizing liquid may result in poor wall formation or adversely affect the construction body.Therefore, after recovering the degraded stabilizing liquid in the storage tank on the ground, take measures to restore the function. It was necessary to restore the function of the stable liquid in the borehole by replacing it with a fresh stable liquid. However, since recovery of the deteriorated liquid requires time and equipment, development of a method capable of recovering the function of the drilling stabilizing liquid in the borehole has been demanded.
【０００４】[0004]
【発明が解決しようとする課題】したがって本発明は、
取扱いが容易で保管スペースをとらず、簡便に掘削安定
液の調製又は機能回復が行える掘削安定液材を提供する
ことを目的とする。また本発明は、ミキサーなどで強制
的に攪拌しなくとも均一な掘削安定液が得られ、計量や
攪拌などのための人手や設備を必要とせず、短時間で完
了しうる掘削安定液の調製方法を提供することを目的と
する。さらに本発明は、劣化した掘削安定液を地上に回
収することなく、掘削孔内で短時間に機能回復しうる掘
削安定液の回復方法を提供することを目的とする。Accordingly, the present invention provides
It is an object of the present invention to provide a drilling stabilizing liquid material that can be easily handled, does not require a storage space, and can easily prepare a drilling stabilizing liquid or recover its function. In addition, the present invention provides a uniform excavation stabilizing solution without forcible stirring with a mixer or the like, and does not require any manpower or equipment for weighing, stirring, etc., and can be prepared in a short period of time. The aim is to provide a method. Still another object of the present invention is to provide a method for recovering a stable drilling fluid that can recover its function within a borehole in a short time without collecting the deteriorated drilling stable fluid on the ground.
【０００５】[0005]
【課題を解決するための手段】本発明者らは上記課題に
鑑み鋭意研究した結果、掘削安定液の成分とともに水中
で発泡する成分を含有する成形掘削安定液材によれば、
発泡による自己分散で攪拌しなくとも掘削安定液が調製
でき、掘削孔内での機能回復も可能であることを見出
し、この知見に基づき本発明をなすに至った。すなわち
本発明は、（１）ベントナイトを含む掘削安定剤成分
に、水発泡性成分を含有させ、これを成形してなること
を特徴とする自己分散型成形掘削安定液材、（２）水発
泡性成分が無機塩及び該無機塩と反応性のある無機酸又
は有機酸である（１）項記載の自己分散型成形掘削安定
液材、（３）（１）又は（２）項記載の自己分散型成形
掘削安定液材を水に分散させることを特徴とする掘削安
定液の調製方法、及び（４）（１）又は（２）項記載の
自己分散型成形掘削安定液材を、劣化した掘削安定液に
分散させることを特徴とする劣化した掘削安定液の回復
方法を提供するものである。Means for Solving the Problems The inventors of the present invention have conducted intensive studies in view of the above problems, and as a result, according to the formed excavation stabilizing liquid material containing a component that foams in water together with a component of the excavating stabilizing liquid,
The present inventors have found that a stable excavation liquid can be prepared without stirring by self-dispersion by foaming, and that the function can be recovered in a borehole, and the present invention has been accomplished based on this finding. That is, the present invention provides (1) a self-dispersible molded excavation stabilizing liquid material, which is obtained by molding a water-foamable component into a drilling stabilizer component containing bentonite, and (2) water foaming. The self-dispersible molded excavation stabilizing liquid material according to (1), wherein the volatile component is an inorganic salt and an inorganic acid or an organic acid reactive with the inorganic salt, and the self-dispersing material according to (3) (1) or (2). The method for preparing a drilling stabilization liquid characterized by dispersing the dispersion-shaped drilling stabilization liquid material in water, and (4) the self-dispersion molding drilling stabilization liquid material described in (1) or (2) is deteriorated. It is intended to provide a method for recovering a deteriorated excavation stabilizing liquid, which is characterized by dispersing in a drilling stabilizing liquid.
【０００５】[0005]
【発明の実施の形態】本発明の掘削安定液材は、ベント
ナイトを含む掘削安定剤成分と、水発泡性成分とを含ん
でなる成形体である。本発明の掘削安定液材に用いるこ
とのできるベントナイトは、天然品でも合成品でもよ
く、例えばナトリウム型ベントナイト、カルシウム型ベ
ントナイト、活性化ベントナイトなどがあげられ、好ま
しくはナトリウム型ベントナイトである。ここでナトリ
ウム型ベントナイトとは、日本ベントナイト工業会分析
規格において、浸出イオンのうちＣａ／Ｎａの濃度比
（モル比）が０．９以下、好ましくは０．８以下のもの
である。粒径は特に制限はないが、分散性のうえでは７
４μｍ以下のものが重量粒度分布８０％以上であるもの
が好ましい。本発明の掘削安定液材中のベントナイトの
割合は特に制限はないが、好ましくは４０〜８０重量
％、さらに好ましくは５０〜７０重量％である。ベント
ナイトが少なすぎると掘削安定液としたときの機能が十
分に発揮されず、多すぎると分散性が低下する場合があ
る。BEST MODE FOR CARRYING OUT THE INVENTION The excavation stabilizing liquid material of the present invention is a molded article comprising an excavation stabilizer component containing bentonite and a water-foamable component. The bentonite that can be used in the excavation stabilizing liquid material of the present invention may be a natural product or a synthetic product, and examples thereof include sodium-type bentonite, calcium-type bentonite, and activated bentonite, and preferably sodium-type bentonite. Here, the sodium-type bentonite is a substance having a Ca / Na concentration ratio (molar ratio) of 0.9 or less, preferably 0.8 or less in the leached ions according to the analysis standards of the Japan Bentonite Industry Association. The particle size is not particularly limited, but is 7 in terms of dispersibility.
Those having a particle size of 4 μm or less preferably have a weight particle size distribution of 80% or more. The ratio of bentonite in the excavation stabilizing liquid material of the present invention is not particularly limited, but is preferably 40 to 80% by weight, and more preferably 50 to 70% by weight. If the amount of bentonite is too small, the function as a drilling stabilizing liquid is not sufficiently exhibited, and if it is too large, the dispersibility may decrease.
【０００６】本発明において、ベントナイト以外の掘削
安定剤成分は、掘削安定液に通常使用されている増粘
剤、分散剤、逸泥防止剤などから選ばれる。本発明の掘
削安定液材に用いることのできる増粘剤としては、従来
の掘削安定液において増粘剤として用いられているも
の、例えば水溶性高分子があげられ、具体的には例え
ば、カルボキシメチルセルロース、ヒドロキシエチルメ
チルセルロース、ヒドロキシプロピルメチルセルロー
ス、メチルセルロース、ヒドロキシエチルセルロースな
どがあげられる。掘削安定剤成分として増粘剤を用いる
場合、本発明の掘削安定液材中の割合は任意に設定でき
るが、好ましくは２〜２０重量％、さらに好ましくは３
〜１０重量％である。In the present invention, the excavation stabilizer component other than bentonite is selected from a thickener, a dispersant, a sludge preventing agent and the like which are usually used in an excavation stabilizer. Examples of the thickener that can be used in the drilling stabilizer of the present invention include those used as a thickener in conventional drilling stabilizers, such as water-soluble polymers, and specifically, for example, carboxy. Examples include methylcellulose, hydroxyethylmethylcellulose, hydroxypropylmethylcellulose, methylcellulose, and hydroxyethylcellulose. When a thickener is used as a drilling stabilizer component, the ratio in the drilling stabilizer liquid material of the present invention can be arbitrarily set, but is preferably 2 to 20% by weight, more preferably 3 to 20% by weight.
-10% by weight.
【０００７】また、掘削安定剤成分として分散剤を用い
る場合は、掘削安定液において分散剤として通常用いら
れているものを特に制限なく用いることができ、具体的
には例えば、ポリカルボン酸系のもの（ポリアクリル酸
ナトリウムなど）、スルホン酸ソーダ、フミン酸ソー
ダ、リグニンスルホン酸ソーダ、トリポリリン酸ソー
ダ、ヘキサメタリン酸ソーダなどがあげられる。分散剤
を用いる場合、掘削安定液材中の割合は任意に定めるこ
とができるが、好ましくは０．１〜２重量％である。[0007] When a dispersant is used as a drilling stabilizer component, those commonly used as a dispersant in a drilling stabilizer can be used without any particular limitation. (Eg, sodium polyacrylate), sodium sulfonate, sodium humate, sodium ligninsulfonate, sodium tripolyphosphate, sodium hexametaphosphate, and the like. When a dispersant is used, the ratio in the excavation stabilizing liquid material can be arbitrarily determined, but is preferably 0.1 to 2% by weight.
【０００８】本発明において掘削安定剤成分として逸泥
防止剤を用いる場合、例えば吸水性樹脂、高吸水性樹
脂、雲母などの板状鉱物、アタパルジャイトやアスベス
トなどの繊維状鉱物などを用いることができるが、これ
らに限定されるものではない。逸泥防止剤を用いる場
合、掘削安定液材中の割合は任意に設定できるが、好ま
しくは０．１〜２重量％である。[0008] In the present invention, when an anti-sludge agent is used as a drilling stabilizer component, for example, a water-absorbent resin, a super-water-absorbent resin, plate-like minerals such as mica, and fibrous minerals such as attapulgite and asbestos can be used. However, the present invention is not limited to these. In the case where a sludge preventive is used, the ratio in the excavation stabilizing liquid material can be arbitrarily set, but is preferably 0.1 to 2% by weight.
【０００９】本発明の掘削安定液材は、水発泡性成分を
含有することにより、水中で発生するガスがベントナイ
トを含む掘削安定剤成分を分散させるため、自己分散性
を有する。水発泡性成分は、発泡において発生するガス
が人体に無害、無毒であり、爆発性を有するものや水溶
性の高いものでなければ適宜選択することができるが、
ベントナイトの劣化要因であるカルシウムイオンと反応
して不活性な物質とする点では炭酸ガスを発生するもの
が好ましい。このとき生成した炭酸カルシウムは微細な
粒子として懸濁し、孔壁の安定保持に寄与する。また、
劣化した安定液中で発生する炭酸ガスは、安定液の機能
回復にも寄与する。本発明において水発泡性成分として
は、水に分散したときに反応して上記したようなガスを
発生する、無機塩と、無機酸又は有機酸とを用いること
が好ましい。無機塩として、具体的には例えば、炭酸塩
（炭酸アンモニウム、炭酸リチウム、炭酸カリウム、炭
酸ナトリウム、炭酸マグネシウム、炭酸カルシウムな
ど）、炭酸水素塩（炭酸水素アンモニウム、炭酸水素リ
チウム、炭酸水素カリウム、炭酸水素ナトリウム、炭酸
水素カルシウム、炭酸水素マグネシウム、炭酸水素マグ
ネシウムカリウムなど）、無機塩鉱物（方解石、苦灰石
など）などがあげられ、好ましくは炭酸ナトリウム、炭
酸マグネシウム、炭酸カルシウム、炭酸水素ナトリウ
ム、方解石である。無機酸又は有機酸は、水中で無機塩
と反応して発泡させる作用をするものであり、安定液の
性質を損なわないものであれば特に制限はない。その具
体例としては、クエン酸、酒石酸、リンゴ酸、マロン
酸、コハク酸、フマル酸、フタル酸、ピロ硫酸塩（ピロ
硫酸カリウム、ピロ硫酸ナトリウムなど）などがあげら
れ、好ましくはクエン酸、コハク酸である。The drilling stabilizing liquid material of the present invention has a self-dispersing property because the gas generated in water disperses a drilling stabilizer component including bentonite by containing a water foaming component. The water-foamable component can be appropriately selected as long as the gas generated during foaming is harmless to the human body, non-toxic, and has no explosive properties or a high water-soluble property.
A substance that generates carbon dioxide gas is preferable from the viewpoint of reacting with calcium ions, which is a cause of deterioration of bentonite, to make the substance inert. The calcium carbonate generated at this time is suspended as fine particles and contributes to the stable maintenance of the pore wall. Also,
The carbon dioxide gas generated in the deteriorated stable liquid also contributes to the recovery of the function of the stable liquid. In the present invention, as the water-foamable component, it is preferable to use an inorganic salt and an inorganic acid or an organic acid which react when dispersed in water to generate the above-mentioned gas. Specific examples of the inorganic salts include, for example, carbonates (ammonium carbonate, lithium carbonate, potassium carbonate, sodium carbonate, magnesium carbonate, calcium carbonate, etc.), hydrogen carbonates (ammonium hydrogen carbonate, lithium hydrogen carbonate, potassium hydrogen carbonate, carbonic acid) Sodium hydrogencarbonate, calcium hydrogencarbonate, magnesium hydrogencarbonate, potassium magnesium hydrogencarbonate, etc., and inorganic salt minerals (calcite, dolomite, etc.), and the like, preferably sodium carbonate, magnesium carbonate, calcium carbonate, sodium hydrogencarbonate, calcite It is. The inorganic acid or organic acid reacts with an inorganic salt in water to cause foaming, and is not particularly limited as long as it does not impair the properties of the stabilizer. Specific examples thereof include citric acid, tartaric acid, malic acid, malonic acid, succinic acid, fumaric acid, phthalic acid, and pyrosulfates (potassium pyrosulfate, sodium pyrosulfate, etc.). Is an acid.
【００１０】水発泡性成分の使用量は、掘削安定液材の
５〜４５重量％が好ましく、２０〜４０重量％がさらに
好ましい。水発泡性成分が多すぎると、掘削安定液を調
製又は回復する際の薬剤の使用量が多くなる。また、少
なすぎると水に分散したときの発泡量及び発泡力が不足
し、薬剤の自己分散性が十分でなくなることがある。水
発泡性成分として無機塩及び無機酸又は有機酸を用いる
場合には、掘削安定剤成分１００重量部に対し、無機塩
を５〜３０重量部、無機酸又は有機酸を５〜３０重量部
とすることが好ましい。なお、本発明の掘削安定液材よ
り発生させる泡は、大きさが比較的小さいもので、発生
する数が多く、発泡力が強く、また、浮力の大きいもの
が好ましい。用いる無機塩の粒度などをこのような泡が
発生するように調整することが好ましく、例えば粒径１
００〜２５０μｍの無機塩を用いるのが好ましい。The amount of the water-foamable component used is preferably from 5 to 45% by weight, more preferably from 20 to 40% by weight, of the excavation stabilizing liquid material. If the amount of the water-foamable component is too large, the amount of the drug used in preparing or recovering the drilling stabilizing solution increases. On the other hand, if the amount is too small, the foaming amount and foaming power when dispersed in water may be insufficient, and the self-dispersibility of the drug may not be sufficient. When an inorganic salt and an inorganic acid or an organic acid are used as the water-foamable component, the inorganic salt or organic acid is 5 to 30 parts by weight based on 100 parts by weight of the excavation stabilizer component. Is preferred. The foam generated from the excavation stabilizing liquid material of the present invention has a relatively small size, a large number of generated bubbles, a strong foaming force, and a large buoyancy. It is preferable to adjust the particle size of the inorganic salt to be used so that such bubbles are generated.
It is preferable to use an inorganic salt having a thickness of 00 to 250 µm.
【００１１】本発明の掘削安定液材は、上記したベント
ナイトを含む掘削安定剤成分及び水発泡性成分と、必要
に応じて界面活性剤などの添加剤を、均一に混合した
後、成形して得られ、成形は加圧成形など通常の方法で
行うことができる。形状、大きさなどは特に制限はな
く、用途に応じて適宜選択できる。形状としては例えば
円盤状、円柱状、ブロック状、アーモンド状、平板状、
球状などがあげられ、大きさは１個ないし数個程度で掘
削安定液が調製できる大型のものから数袋投入して使用
する小型のものまで適宜選択できる。大型のものの場合
には箱詰めなどして持ち運びやすい大きさ、重量とする
のが好ましい。本発明の掘削安定液材は固形成形物であ
るため、使用時の粉塵の発生がなく、取扱いが容易で保
管スペースも少なくてすみ、使用量も計量せずに簡便に
決定することができる。The drilling stabilizing liquid material of the present invention is formed by uniformly mixing the above-mentioned drilling stabilizer component including bentonite and a water-foamable component, and if necessary, an additive such as a surfactant, and then molding. Obtained and molded can be performed by a usual method such as pressure molding. The shape, size, and the like are not particularly limited, and can be appropriately selected depending on the application. As the shape, for example, disk shape, column shape, block shape, almond shape, flat shape,
The size is about one or several pieces, and the size can be appropriately selected from a large one that can prepare a drilling stabilizing solution to a small one that is used by inserting several bags. In the case of a large one, it is preferable to have a size and weight that are easy to carry by packing in a box or the like. Since the excavation stabilizing liquid material of the present invention is a solid molded product, there is no generation of dust at the time of use, it is easy to handle, the storage space is small, and the amount of use can be determined easily without measuring the used amount.
【００１２】次に、本発明の掘削安定液の調製方法につ
いて説明する。本発明においては、水１リットルに対
し、上記した本発明の掘削安定液材を好ましくは１０〜
１００ｇ、さらに好ましくは３０〜５０ｇ分散して掘削
安定液とする。また、安定液材の分散性、安定液の性質
を損ねない範囲で海水などの塩類が分散媒（水）に含ま
れていてもよい。本発明の掘削安定液材は水に分散する
と発泡するため、水タンクなどに投入して数分〜数時間
放置するだけで、攪拌を必要とせずに掘削安定液の調製
を完了することができる。すぐに安定液が必要な場合
も、従来のようにミキサーなどで攪拌する必要はなく、
タンク内の液をポンプで循環する程度で迅速に掘削安定
液が得られる。このようにして得られた掘削安定液は、
掘削孔への注入において十分均一になるが、使用直前に
ポンプでタンク内の液を循環するとさらに均一になり好
ましい。本発明の掘削安定液の調製方法においては、各
成分の計量、混合が不要で、一度で全ての成分を水に加
えることができ、攪拌やノズル吸引などを行う必要もな
い。このため、簡便に短時間で掘削安定液を調製でき、
掘削安定液の調製、管理のための人員を常時配置する必
要がなく、攪拌設備も不要である。この掘削安定液は、
土木用、ボーリング用など、種々の用途で用いることが
できる。Next, a method for preparing a drilling stabilizing solution of the present invention will be described. In the present invention, the above-mentioned excavation stabilizing liquid material of the present invention is preferably used in an amount of 10 to 1 liter of water.
100 g, more preferably 30 to 50 g, is dispersed to obtain a drilling stable liquid. Salts such as seawater may be contained in the dispersion medium (water) as long as the dispersibility of the stable liquid material and the properties of the stable liquid are not impaired. Since the excavation stabilizing liquid material of the present invention foams when dispersed in water, it is possible to complete the preparation of the excavation stabilizing liquid without stirring, only by putting it in a water tank or the like and leaving it for several minutes to several hours. . Even when a stable liquid is needed immediately, there is no need to stir with a mixer as in the past,
Excavation stabilizing liquid can be obtained quickly by circulating the liquid in the tank with a pump. The drilling stabilizer obtained in this way is:
Although it is sufficiently uniform when injected into the borehole, it is preferable to circulate the liquid in the tank with a pump immediately before use, since it becomes more uniform. In the method for preparing a stable drilling liquid according to the present invention, it is not necessary to measure and mix each component, all components can be added to water at once, and there is no need to perform agitation or nozzle suction. For this reason, a stable drilling solution can be prepared easily and in a short time,
There is no need to constantly assign personnel for preparation and management of the drilling stabilizing solution, and no stirring equipment is required. This drilling stabilizer is
It can be used for various purposes such as civil engineering and boring.
【００１３】また、本発明においては、掘削過程でセメ
ントや海水などによって劣化した掘削安定液に本発明の
掘削安定液材を投入し、分散させることにより、掘削安
定液の機能回復を行うことができる。このときの本発明
の掘削安定液材の使用量は、掘削安定液の劣化の度合い
や使用環境などにより異なるが、劣化した掘削安定液１
リットルに対し好ましくは１〜２０ｇ、さらに好ましく
は３〜１０ｇである。本発明の掘削安定液の回復方法に
おいては、劣化した掘削安定液に薬剤を投入するだけで
よいので、地上に安定液を回収することなく掘削孔中で
機能回復を行うことができ、ミキサーやノズル吸引など
による攪拌の必要もない。また、従来は古い安定液を回
収した後、新しい安定液を注入する方法が行われていた
が、本発明の方法によれば掘削安定液の使用量がこれに
比べてはるかに少なくなり、さらには機能回復に要する
時間も短くてすむ。Further, in the present invention, the function of the excavation stabilizing liquid can be recovered by putting the excavating stabilizing liquid material of the present invention into the excavating stabilizing liquid deteriorated by cement, seawater or the like during the excavation process and dispersing the same. it can. At this time, the amount of the excavating stabilizer used depends on the degree of deterioration of the excavating stabilizer and the use environment.
The amount is preferably 1 to 20 g, more preferably 3 to 10 g per liter. In the method for recovering a stable drilling liquid according to the present invention, since it is only necessary to add a chemical to the deteriorated drilling stable liquid, the function can be recovered in the wellbore without collecting the stable liquid on the ground, and a mixer, There is no need for stirring by nozzle suction or the like. Conventionally, a method of injecting a new stabilizer after recovering the old stabilizer has been used.However, according to the method of the present invention, the amount of the drilling stabilizer used is much smaller, and The time required for functional recovery is short.
【００１４】[0014]
【実施例】次に、本発明を実施例に基づいてさらに詳細
に説明する。 実施例１ ナトリウム型ベントナイト（６３μｍ以下の重量粒度分
布９０％）６４重量部、増粘剤（カルボキシルメチルセ
ルロース）５重量部、分散剤（ポリアクリル酸ナトリウ
ム）０．４重量部、逸泥防止剤（吸水性樹脂）０．６重
量部、炭酸水素ナトリウム（粒径１５０μｍ）１６重量
部、コハク酸１４重量部を均一になるよう混合した後、
直径５０ｍｍ、高さ６０ｍｍ、密度１．５ｇ／ｃｍ3 の
円柱状に加圧成形し、掘削安定液材を得た。これを水５
リットル中に投入し、１５分間放置した後、目開き０．
５ｍｍの篩に全量注入したところ、全て篩を通過した。Next, the present invention will be described in more detail with reference to examples. Example 1 64 parts by weight of sodium-type bentonite (weight particle size distribution of 63 μm or less: 90%), 5 parts by weight of a thickener (carboxymethyl cellulose), 0.4 part by weight of a dispersant (sodium polyacrylate), After mixing 0.6 parts by weight of a water-absorbing resin, 16 parts by weight of sodium hydrogen carbonate (particle size: 150 μm) and 14 parts by weight of succinic acid,
Pressure molding was performed into a columnar shape having a diameter of 50 mm, a height of 60 mm and a density of 1.5 g / cm 3 to obtain a drilling stable liquid material. This is water 5
Liter and left for 15 minutes.
When the whole amount was injected into a 5-mm sieve, all passed through the sieve.
【００１５】従来例１ 実施例１で用いたのとそれぞれ同じナトリウム型ベント
ナイト６４重量部、増粘剤５重量部、分散剤０．４重量
部、逸泥防止剤０．６重量部を均一に混合した後、粉体
のまま水５リットル中に投入し、プロペラ型攪拌機によ
り完全に分散したと認められるまで１５分間攪拌して掘
削安定液を得た。Conventional Example 1 64 parts by weight of sodium-type bentonite, 5 parts by weight of a thickener, 0.4 parts by weight of a dispersant, and 0.6 parts by weight of a sludge-preventing agent as used in Example 1 were uniformly mixed. After mixing, the powder was poured into 5 liters of water as it was, and stirred for 15 minutes with a propeller-type stirrer until it was recognized that the powder was completely dispersed, thereby obtaining a stable drilling liquid.
【００１６】比較例１ 実施例１で用いたのとそれぞれ同じナトリウム型ベント
ナイト６４重量部、増粘剤５重量部、分散剤０．４重量
部、逸泥防止剤０．６重量部、炭酸水素ナトリウム１６
重量部、コハク酸１４重量部を均一に混合した後、加圧
成形を行わずに粉体のまま水５リットル中に投入後、１
５分間攪拌して掘削安定液を得た。これを実施例１で用
いたのと同じ篩に全量注入したところ、篩残量は湿潤重
量比で３２．１％、乾燥重量比で１４．３％であった。Comparative Example 1 64 parts by weight of sodium-type bentonite, 5 parts by weight of a thickener, 0.4 parts by weight of a dispersant, 0.6 parts by weight of a sludge preventing agent, and hydrogencarbonate, the same as those used in Example 1, respectively. Sodium 16
Parts by weight, and 14 parts by weight of succinic acid were uniformly mixed.
Stirring was performed for 5 minutes to obtain a drilling stable liquid. When the whole was injected into the same sieve as used in Example 1, the remaining amount of the sieve was 32.1% by wet weight ratio and 14.3% by dry weight ratio.
【００１７】実施例２ コハク酸に代えてクエン酸を用いた以外は実施例１と全
く同様にして掘削安定液材を得、これを水５リットルに
投入して１５分間放置して掘削安定液を得た。これを実
施例１で用いたのと同じ篩に全量注入したところ、全て
篩を通過した。Example 2 Excavation stabilizing liquid material was obtained in exactly the same manner as in Example 1 except that citric acid was used in place of succinic acid. I got When the whole amount was injected into the same sieve as used in Example 1, all the particles passed through the sieve.
【００１８】実施例３ 実施例１と全く同様にして得た掘削安定液材を、塩化ナ
トリウム水溶液（３ｇ／リットル）５リットル中に投入
し、１５分間放置して掘削安定液を得た。これを実施例
１で用いたのと同じ篩に全量注入したところ、全て篩を
通過した。Example 3 An excavation stabilizing liquid material obtained in exactly the same manner as in Example 1 was put into 5 liters of an aqueous sodium chloride solution (3 g / liter) and left standing for 15 minutes to obtain an excavation stabilizing liquid. When the whole amount was injected into the same sieve as used in Example 1, all the particles passed through the sieve.
【００１９】比較例２ 水に代えて塩化ナトリウム水溶液（３ｇ／リットル）５
リットルを用いた以外は比較例１と同様にして掘削安定
液を得た。これを実施例１で用いたのと同じ篩に全量注
入したところ、篩残量は湿潤重量比で２８．３％、乾燥
重量比で１１．４％であった。Comparative Example 2 An aqueous solution of sodium chloride (3 g / liter) 5 instead of water 5
Excavation stabilizer was obtained in the same manner as in Comparative Example 1 except that liter was used. When the whole was injected into the same sieve as used in Example 1, the remaining amount of the sieve was 28.3% by wet weight ratio and 11.4% by dry weight ratio.
【００２０】試験例 実施例１〜３、従来例１及び比較例１、２で得られた掘
削安定液について下記の性状を試験した。結果を表１に
示した。 ファンネル粘性 各安定液についてファンネル粘度計を用いて測定した。 見掛け粘度、塑性粘度、降伏値 Ｆａｎｎ Ｖｉｓｃｏｍｅｔｅｒ Ｍｏｄｅｌ ３５Ｓ
Ａ（Ｆａｎｎ Ｉｎｓｔｒｕｍｅｎｔ 社製）を用いて
測定した。 ゲル強度 攪拌を停止した後１０秒又は１０分経過した安定液のゲ
ル強度をＦａｎｎ Ｖｉｓｃｏｍｅｔｅｒ Ｍｏｄｅｌ
３５ＳＡを用いて測定した。 濾水量 Ｆａｎｎ Ｆｉｌｔｅｒｐｒｅｓｓ Ｍｏｄｅｌ １２
ＢＬ（Ｆａｎｎ Ｉｎｓｔｒｕｍｅｎｔ 社製）で、窒
素ガスにより３ｋｇ／ｃｍ2 で３０分間加圧して測定し
た。 比重 ＭＵＤ ＢＡＬＡＮＣＥ（ＢＡＲＯＩＤ社製）で測定し
た。Test Example The following properties were tested on the excavation stabilizers obtained in Examples 1 to 3, Conventional Example 1 and Comparative Examples 1 and 2. The results are shown in Table 1. Funnel Viscosity Each stable liquid was measured using a funnel viscometer. Apparent viscosity, plastic viscosity, yield value Fann Viscometer Model 35S
A (manufactured by Fann Instrument). Gel Strength The gel strength of the stable solution 10 seconds or 10 minutes after the stirring was stopped was measured using the Fan Viscometer Model.
It was measured using 35SA. Free drainage Fann Filterpress Model 12
BL (manufactured by Fann Instrument Company) was measured by pressurizing with nitrogen gas at 3 kg / cm 2 for 30 minutes. Specific gravity was measured by MUD BALANCE (manufactured by BAROID).
【００２１】[0021]
【表１】 [Table 1]
【００２２】実施例１〜３の、本発明の掘削安定液材を
用いて調製した掘削安定液は、攪拌を全く行っていない
にもかかわらず篩残量がゼロであり、比較例１及び２で
得られた安定液より優れ、性状も攪拌を行った従来例１
の安定液と同等のものが得られていることがわかる。The excavating stabilizers of Examples 1 to 3 prepared using the excavating stabilizer of the present invention had a sieve remaining amount of zero even though no agitation was performed, and Comparative Examples 1 and 2 Conventional example 1 which was superior to the stable liquid obtained in step 1 and the properties were also agitated
It can be seen that a liquid equivalent to the stable liquid was obtained.
【００２３】実施例４ 実施例１で用いたのとそれぞれ同じナトリウム型ベント
ナイト６０重量部、増粘剤４重量部、分散剤１．５重量
部、逸泥防止剤０．５重量部、炭酸水素ナトリウム２０
重量部、コハク酸１４重量部を均一になるよう混合した
後、直径２０ｍｍ、高さ２０ｍｍ、密度１．５ｇ／ｃｍ
3 の円柱状に加圧成形し、掘削安定液材を得た。下記表
２のＮo.１に示した性状を有する掘削安定液を用いて掘
削を行い、表２のＮo.２に示した性状に劣化した掘削安
定液３リットルに、この掘削安定液材を添加し、１０分
間放置した後に全体を軽く攪拌して回復した安定液の性
状を上記試験例と同様にして測定した。結果を表２にＮ
o.３として示した。Example 4 The same sodium-type bentonite as used in Example 1, 60 parts by weight, 4 parts by weight of thickener, 1.5 parts by weight of dispersant, 0.5 parts by weight of anti-sludge agent, hydrogencarbonate Sodium 20
Parts by weight, 14 parts by weight of succinic acid are mixed uniformly, then the diameter is 20 mm, the height is 20 mm, and the density is 1.5 g / cm.
It was press-formed into a columnar shape of 3 to obtain a stable drilling liquid material. Drilling is performed using the drilling stabilizer having the properties shown in Table 2 below, and this drilling stabilizer is added to 3 liters of the drilling stabilizer which has deteriorated to the properties shown in Table 2 No. 2. After standing for 10 minutes, the whole was stirred gently, and the properties of the recovered stable liquid were measured in the same manner as in the above Test Example. Table 2 shows the results.
o.3.
【００２４】[0024]
【表２】 [Table 2]
【００２５】表２のＮo.２の劣化した安定液は、凝集性
イオンの影響を受けゲル化したことによりファンネル粘
性や降伏値の上昇、濾水量の増大、及び掘削土砂（粘
土、シルト、砂）を沈降分離できないための比重の上昇
が認められる。しかし、本発明方法による機能回復を行
ったＮo.３の安定液は、ゲルが解かれ、降伏値の低下に
よるファンネル粘性の低下がみられ、濾水量や比重も低
下し、掘削に使用する前の安定液に近い性状となってお
り、十分に機能回復されていることがわかる。The deteriorated stable liquid of No. 2 in Table 2 was gelled under the influence of coagulating ions, so that the funnel viscosity and the yield value increased, the amount of drainage increased, and the excavated soil (clay, silt, sand) ) Cannot be separated by sedimentation, and an increase in specific gravity is observed. However, the stabilized liquid of No. 3 which had recovered its function according to the method of the present invention was disintegrated in gel, had a decrease in the funnel viscosity due to a decrease in the yield value, and had a reduced drainage amount and specific gravity. The properties are close to those of the stable liquid, and it can be seen that the function has been sufficiently recovered.
【００２６】[0026]
【発明の効果】本発明の掘削安定液材は、固形であるた
め取扱い時の粉塵の発生がなく、運搬、使用などの取扱
いが容易で、保管スペースも小さくてすみ、計量を行わ
ずに使用量が決定できる。本発明の掘削安定液材によれ
ば、必要な成分を一度に添加することができ、簡便に短
時間で掘削安定液を調製できる。また、本発明の掘削安
定液材は自己分散性を有するため、攪拌しなくとも均一
な掘削安定液を調製することができ、掘削孔内の劣化し
た安定液に本発明の薬剤を投入するだけで安定液の機能
回復を行うことができる。このような本発明の掘削安定
液材によれば、掘削安定液の調製、管理のために常時人
員を配置する必要がなく、安定液の攪拌や劣化液の回収
のための設備も不要となる。EFFECTS OF THE INVENTION The solid material for excavation of the present invention is solid, so that no dust is generated at the time of handling, it is easy to handle during transportation and use, the storage space is small, and it can be used without weighing. The amount can be determined. According to the excavation stabilizing liquid material of the present invention, necessary components can be added at once, and the excavation stabilizing liquid can be prepared easily and in a short time. Further, since the excavation stabilizing liquid material of the present invention has self-dispersibility, a uniform excavating stabilizing liquid can be prepared without stirring, and the agent of the present invention is simply added to the deteriorated stabilizing liquid in the drilling hole. Thus, the function of the stabilizer can be recovered. According to such a drilling stabilizing liquid material of the present invention, it is not necessary to constantly arrange personnel for preparation and management of the drilling stabilizing liquid, and equipment for stirring the stabilizing liquid and collecting the deteriorated liquid is not required. .
Claims (4)
水発泡性成分を含有させ、これを成形してなることを特
徴とする自己分散型成形掘削安定液材。1. A drilling stabilizer component containing bentonite,
A self-dispersed molded excavation stabilizing liquid material characterized by containing a water-foamable component and being molded.
応性のある無機酸又は有機酸である請求項１記載の自己
分散型成形掘削安定液材。2. The self-dispersing excavation stabilizing liquid material according to claim 1, wherein the water-foamable component is an inorganic salt and an inorganic acid or an organic acid reactive with the inorganic salt.
削安定液材を水に分散させることを特徴とする掘削安定
液の調製方法。3. A method for preparing a drilling stabilizing solution, comprising: dispersing the self-dispersible molded excavating stabilizing liquid material according to claim 1 or 2 in water.
削安定液材を、劣化した掘削安定液に分散させることを
特徴とする劣化した掘削安定液の回復方法。4. A method for recovering a deteriorated excavation stabilizing liquid, comprising dispersing the self-dispersible shaped excavation stabilizing liquid material according to claim 1 or 2 into the deteriorated excavation stabilizing liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13401098A JPH11323322A (en) | 1998-05-15 | 1998-05-15 | Self-dispersive molding excavation stabilizing solution and preparation of excavation stabilizing solution and method for recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13401098A JPH11323322A (en) | 1998-05-15 | 1998-05-15 | Self-dispersive molding excavation stabilizing solution and preparation of excavation stabilizing solution and method for recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11323322A true JPH11323322A (en) | 1999-11-26 |
Family
ID=15118279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13401098A Pending JPH11323322A (en) | 1998-05-15 | 1998-05-15 | Self-dispersive molding excavation stabilizing solution and preparation of excavation stabilizing solution and method for recovery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11323322A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007501319A (en) * | 2003-05-13 | 2007-01-25 | シュランベルジェ、ホールディング、リミテッド | Well treatment method for preventing or treating lost mud |
| JP2011202355A (en) * | 2010-03-24 | 2011-10-13 | Waseda Univ | Method for creating underground structure with standard bubble stabilizing liquid |
| JP2020023624A (en) * | 2018-08-07 | 2020-02-13 | クニミネ工業株式会社 | Mud loss inhibitor |
| JP2020082031A (en) * | 2018-11-30 | 2020-06-04 | 株式会社大林組 | Process for treating waste slurry |
-
1998
- 1998-05-15 JP JP13401098A patent/JPH11323322A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007501319A (en) * | 2003-05-13 | 2007-01-25 | シュランベルジェ、ホールディング、リミテッド | Well treatment method for preventing or treating lost mud |
| JP4842132B2 (en) * | 2003-05-13 | 2011-12-21 | シュランベルジェ、ホールディング、リミテッド | Well treatment method for preventing or treating lost mud |
| JP2011202355A (en) * | 2010-03-24 | 2011-10-13 | Waseda Univ | Method for creating underground structure with standard bubble stabilizing liquid |
| JP2020023624A (en) * | 2018-08-07 | 2020-02-13 | クニミネ工業株式会社 | Mud loss inhibitor |
| JP2020082031A (en) * | 2018-11-30 | 2020-06-04 | 株式会社大林組 | Process for treating waste slurry |
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