JP3831282B2 - Pile circumference fixing liquid and underground pile creation method - Google Patents
Pile circumference fixing liquid and underground pile creation method Download PDFInfo
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- JP3831282B2 JP3831282B2 JP2002082362A JP2002082362A JP3831282B2 JP 3831282 B2 JP3831282 B2 JP 3831282B2 JP 2002082362 A JP2002082362 A JP 2002082362A JP 2002082362 A JP2002082362 A JP 2002082362A JP 3831282 B2 JP3831282 B2 JP 3831282B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Description
【０００１】
【発明の属する技術分野】
本発明は、杭周固定液及びこれを用いた地中杭の造成方法に関する。さらに詳しくは、地中に撹拌羽根を用いて柱状の撹拌部を形成し、この撹拌部内に杭を設置する場合に、撹拌部形成に用いる杭周固定液、及びこれを用いて撹拌部を地中に形成して杭を沈設する地中杭の造成方法に関する。
【０００２】
【従来の技術】
地中に杭を設置する場合、地中に撹拌部を形成してその中に杭を沈設し固化支持させる従来の全体掘削施工技術は、次の（１）〜（４）の工程で構成されている。
（１）掘削ビット、アースオーガ、杭周固定液等からなる掘削シャフトを用いて、施工地盤内に掘削液（一般に水を使用する）を注入しながら、地盤に応じた速度で正回転にて所定深度まで掘削を行い、撹拌された掘削孔を形成する。掘削液は掘削ビットの先端から吐出され、地盤の掘削抵抗を減少させるとともに孔内を泥土化し、孔壁の崩壊を防止する。所定掘削深度に達した後、掘削シャフトを正回転のまま数回昇降させる。
（２）反復昇降を行った後、所定深度の位置で、注入液を掘削液から根固め液に切り替え、根回め液を注入しながら、掘削底部に根回め球根を築造する。根回め液は、杭先端部を地盤に定着させ、先端支持力を確保することを目的としたセメントミルクである。
（３）掘削シャフトを引き上げながら杭周固定液を注入・撹拌しつつ、地盤内にソイルセメント状の撹拌部を形成する。
（４）その後、節杭（杭頭及び先端部に金具を取付た先端開放杭）を掘削孔内に自沈又は回転埋設し、その先端が所定深度位置になるように設置する。杭の沈設は鉛直性を保ちながら、オーバフロー液がゆるやかに杭周から流れ出る程度の沈設速度で沈設する。
【０００３】
【発明が解決しようとする課題】
上記、掘削シャフトを引き上げながら杭周固定液を注入・撹拌しつつ、地盤内にソイルセメント状の撹拌部を形成する工程では、従来、杭周固定液としてセメントミルクを使用していた。ところが、従来の杭は、杭周囲の地盤との密着性が劣り、所期の十分な支持力を期待することができないと言う問題があった。この問題について研究したところ、杭周固定液に改善の余地があることを知見し、本発明を完成するに至った。本発明はこの知見に基づき杭周固定液及びこれを用いた地中杭の造成方法を提供することを目的とする。
【０００４】
【課題を解決するための手段】
本発明の杭周固定液としては、
高炉スラグ微粉末混入セメント：６〜１１質量部、
水：４〜６．５質量部
無水石膏：高炉スラグ微粉末混入セメントに対して
５〜１５質量％、
増粘剤：高炉スラグ微粉末混入セメントと無水石膏の合計に対して
０．１〜０．３質量％、
減水剤：高炉スラグ微粉末混入セメントと無水石膏の合計に対して
３質量％以下
からなることを特徴とする。
【０００５】
本発明において高炉スラグ微粉末混入セメントとは、高炉セメント、又は普通ポルトランドセメントに高炉スラグ微粉末を混合したセメントを云う。後者では現場で調合したものも含まれる。本発明の杭周固定液は、高炉スラグ微粉末混入セメントと水を主原料とし、石膏、増粘剤、減水剤を加えたものである。水セメント比は４０〜８０％とするとよい。この杭周固定液は地中に形成する撹拌部の容積に対して２０〜４０容積％を注入する。本発明の杭周固定液は、上記のものにさらに細骨材８質量部以下を含むものとすれば好適である。そして、この場合に、前記細骨材の一部又は全部を水砕スラグ又は製鋼スラグと置換してもよく、強度や付着性がさらに向上し、杭周の摩擦力が大となるので極めて好適である。水砕スラグは、高炉から排出されたスラグを水で急冷して得た、ほぼ３ｍｍ以下のガラス質の細粒又はこの細粒を微粉砕した粉砕物を云う。また製鋼スラグは、製鋼炉から排出されて徐冷されたスラグである。細骨材としてはこれを粉砕して用いる。
【０００６】
次に、本発明方法は、上記した杭周固定液を用いて地中を撹拌し、地中杭を沈設すべき撹拌部を地中に形成し、この撹拌部内に杭を沈設することを特徴とする地中杭の造成方法である。
【０００７】
【発明の実施の形態】
杭周固定液は、掘削土と撹拌混合して地中に掘削土との撹拌部を形成し、この撹拌物が杭周面の空間を充填し、杭周面の摩擦力及び水平抵抗力を確保することを目的とした液である。従来は、水セメント比Ｗ／Ｃが６０〜８０質量％のセメントミルクを用い、標準注入量は、撹拌部の容積の２０〜３０容積％としていた。ここで、撹拌部の容積は杭周固定液注入区間における掘削断面積と深さとの積である。本発明は従来のセメントミルクとは異なる杭周固定液を提供する。
【０００８】
以下、本発明の杭周固定液の数値限定理由について説明する。本発明の杭周固定液は主剤として高炉スラグ微粉末混入セメント及び水から成る。
【０００９】
高炉スラグ微粉末混入セメント：６〜１１質量部
セメントとしては高炉スラグ微粉末混入セメントを用いる。ＪＩＳで定める高炉セメントＢ種のほか、普通ポルトランドセメントと高炉スラグ微粉末の混合品を使用する。高炉セメントは高炉スラグ３０〜６０質量％を混入したもので、普通ポルトランドセメントに比し、耐久性が優れ、長期強度の増進があり、一方水和熱が低いという特色がある。水４〜６．５質量部に対して高炉スラグ微粉末混入セメント６〜１１質量部を配合する。６質量部未満では強度が所望値に達しないのでこれ以上とし、１１質量部を越えて加えると富配合に過ぎ、コスト的にもバランスを失するので制限した。
【００１０】
水：４〜６．５質量部
水は、高炉スラグ微粉末混入セメント質量部との関係で定まるもので４〜６．５質量部とする。水セメント比は４０〜８０％が適当である。
【００１１】
細骨材：８質量部以下
細骨材としては５ｍｍ以下の砂等を用いる。また、その一部又は全量を水砕スラグ又は製鋼スラグと代替することができる。水砕スラグは骨材として撹拌部の強度を増進し、剪断抵抗が大きく、また微粉分はポゾラン効果により長期強度の増進に寄与する。前記高炉スラグ微粉末混入セメント６〜１１質量部に対し、８質量部を越えて添加すると杭周固定液の流動性が低下し、また土との均一混和性を阻害するので８質量部を上限とした。下限は撹拌部のもとの地質によって適宜定めることができ、例えば非常に良好な砂質層では０としてもよい。
【００１２】
無水石膏：高炉スラグ微粉末混入セメントに対して５〜１５質量％
無水石膏は撹拌部が硬化するに伴って膨張する特性を付与するもので、高炉スラグ微粉末混入セメントに対して５質量％未満では膨張性が不足であり、１５質量％を越えると却って撹拌部の強度が低下する問題があり、またコストアップとなるので好ましくない。
【００１３】
増粘剤：高炉スラグ微粉末混入セメントと無水石膏の合計に対して０．１〜０．３質量％
増粘剤は撹拌部の細骨材、水砕スラグ又は製鋼スラグが分離沈降するのを防止し、混練を容易にする。高炉スラグ微粉末混入セメントと無水石膏の合計量に対して０．１質量％未満ではその効果が乏しく、０．３質量％を越えて添加しても、効果が飽和するので、０．１〜０．３質量％とした。増粘剤としてはメチルセルローズを用いるとよい。
【００１４】
減水剤：高炉スラグ微粉末混入セメントと無水石膏の合計に対して３質量％以下
減水剤は粉末を分散させる優れた効果を有し、単位水量を減ずることができる。減水剤を多量に使用しても効果の増進が少なく、３質量％以下の適量とするのがよい。減水剤としては、花王（株）製マイティ−１５０（ＭＴ−１５０）などを用いると好適である。
【００１５】
本発明方法は上述の杭周固定液を用いて地中を撹拌し、地中杭を沈設すべき撹拌部を地中に形成し、この撹拌部内に杭を沈設することを特徴とする地中杭の造成方法である。このとき杭周固定液の注入量は撹拌部の容積に対して２０〜４０容積％とし、流量計を用いて管理する。掘削撹拌のときの掘削シャフトの引き上げ速度は、地盤の緩みや孔壁の崩壊が生じないように１〜３ｍ／分程度の速度で正回転しながら引き上げる。
【００１６】
【実施例】
次に本発明の実施例について説明する。表１に示すようにポルトランドセメントを主成分とする杭周固定液Ｎｏ．１及びＮｏ．２と、高炉セメントを主成分とし、石膏、増粘剤、減水剤を添加した杭周固定液Ｎｏ．３及びＮｏ．４を準備した。表中の配合は杭周固定液１ｍ3当りの添加量で表示した。これらの杭周固定液を用いて土砂と混合し、成形物の圧縮強度及び長さの変化を調べた。図１に経過日数と長さの変化の推移を示した。高炉セメントを用いた例では、好ましい長さの変化（膨張）を示している。
【００１７】
この膨張は、地中に撹拌部を形成して杭をその中に沈設して日時が経過し、撹拌部が硬化したとき、杭周の摩擦力、締付力が増大し、杭の支持力が増加することを示している。この膨張は６０００×１０-6までは有効に作用し、これを越えると却って孔壁が弱化するので不利である。表１及び図１の結果から従来のポルトランドセメントによる混合材Ｎｏ．１では収縮が生じ、石膏を加えたＮｏ．２では微弱な膨張が起る。Ｎｏ．３及びＮｏ．４では高炉セメント及び石膏の効果が顕著であり、また、増粘剤、減水剤が施工時に好ましい作用を奏していることが認められる。
【００１８】
次に表２に示す配合の杭周固定液と土砂との撹拌混合体について圧縮強度、長さ変化を調べた。配合の表示は表１と同様である。図２は、杭周固定液Ｎｏ．５、Ｎｏ．６、Ｎｏ．７の長さ変化を示すものである。Ｎｏ．６の高炉セメントを用いたものが最もすぐれた性能を示している。
【００１９】
次に表３に示す配合の杭周固定液を用いて砂質地層に地表から直径６００ｍｍφ、深さ８ｍの撹拌部を形成した。配合の表示は表１と同様である。深さ４ｍまでは粘性土、その下方はＮ値３０程度の砂層である。撹拌部を撹拌形成した直後に撹拌部の中心に上から塩化ビニルパイプを鉛直に押し込んだ。撹拌部形成後材令２８日経過した後、塩化ビニルパイプを引上げて引抜き、引抜いた塩化ビニルパイプを長さ１ｍごとに切断してその内部のコアの圧縮強度を調べた。その結果を表４に示した。表４中Ｃは表３のＮｏ．９に示す従来の杭周固定液を用いて、撹拌部を形成したもので、地表から２ｍまでは強度の測定ができず、杭底でも１ＭＰａ程度であった。表４中のＢ及びＡはは表３のＮｏ．８に示す本発明の杭周固定液を用いて撹拌部を形成したものでＢはＣと同様の撹拌混合、Ａはさらに撹拌を強化したものである。Ｂでは、杭底で５ＭＰａを越える圧縮強度となっており、さらにＡでは７ＭＰａ程度まで向上しており、本発明の杭周固定液がすぐれた効果を奏することを示している。
【００２０】
【表１】
【表２】
【表３】
【表４】
【発明の効果】
本発明によれば、高強度の撹拌部を形成することができ、杭の支持力向上に寄与するところが大である。
【図面の簡単な説明】
【図１】膨張率の経時変化を示すグラフである。
【図２】膨張率の経時変化を示すグラフである。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pile periphery fixing liquid and a method for creating an underground pile using the same. More specifically, when a columnar stirring part is formed in the ground using a stirring blade and a pile is installed in the stirring part, a pile peripheral fixing liquid used for forming the stirring part, and the stirring part is grounded using this. The present invention relates to a method for constructing underground piles that are formed inside and piles.
[0002]
[Prior art]
When installing piles in the ground, the conventional whole excavation construction technology that forms a stirring part in the ground, sinks the piles in the ground, and supports the solidification is composed of the following steps (1) to (4). ing.
(1) Using a drilling shaft made of a drill bit, earth auger, pile circumference fixing liquid, etc., while injecting drilling fluid (generally using water) into the construction ground, it rotates at a speed according to the ground. Drilling to a predetermined depth to form a stirred drilling hole. The drilling fluid is discharged from the tip of the drill bit, reducing the excavation resistance of the ground and making the inside of the hole mud to prevent the collapse of the hole wall. After reaching a predetermined excavation depth, the excavation shaft is moved up and down several times while maintaining a normal rotation.
(2) After repeatedly raising and lowering, at a predetermined depth, the injection solution is switched from the drilling solution to the root hardening solution, and the rooting bulb is built at the bottom of the excavation while injecting the root turning solution. The root turning liquid is cement milk intended to fix the tip of the pile on the ground and secure the tip support force.
(3) A soil cement-like stirrer is formed in the ground while injecting and stirring the pile circumference fixing liquid while pulling up the excavation shaft.
(4) After that, node piles (open-ended piles with metal fittings attached to the pile head and tip) are self-sunk or rotationally buried in the excavation hole, and installed so that the tip is at a predetermined depth. Pile is set at a setting speed that allows the overflow liquid to gently flow out of the circumference of the pile while maintaining verticality.
[0003]
[Problems to be solved by the invention]
In the process of forming a soil cement-like stirring portion in the ground while injecting and stirring the pile circumference fixing liquid while pulling up the excavation shaft, cement milk has been conventionally used as the pile circumference fixing liquid. However, the conventional pile has a problem that the adhesion with the ground around the pile is inferior, and the expected sufficient support force cannot be expected. As a result of research on this problem, the present inventors have found that there is room for improvement in the pile circumference fixing liquid and have completed the present invention. An object of this invention is to provide the construction method of an underground pile using the pile circumference fixing liquid and this based on this knowledge.
[0004]
[Means for Solving the Problems]
As the pile circumference fixing liquid of the present invention,
Blast furnace slag fine powder mixed cement: 6-11 parts by mass,
Water: 4 to 6.5 parts by mass Anhydrous gypsum: For cement containing blast furnace slag fine powder
5 to 15% by mass ,
Thickener: To the total of cement and anhydrous gypsum mixed with blast furnace slag fine powder
0.1 to 0.3% by mass ,
Water reducing agent: Total of cement and anhydrous gypsum mixed with blast furnace slag fine powder
It consists of 3 mass% or less.
[0005]
In the present invention, the blast furnace slag fine powder-mixed cement refers to a blast furnace cement or a cement obtained by mixing normal Portland cement with blast furnace slag fine powder. The latter includes those prepared on site. The pile circumference fixing liquid of the present invention is mainly made of cement mixed with blast furnace slag fine powder and water, and added with gypsum, a thickener and a water reducing agent. The water-cement ratio is preferably 40 to 80%. This pile periphery fixing liquid inject | pours 20-40 volume% with respect to the volume of the stirring part formed in the ground. The pile periphery fixing liquid of the present invention is suitable if the above-mentioned one further contains 8 parts by mass or less of fine aggregate. In this case, part or all of the fine aggregate may be replaced with granulated slag or steelmaking slag, which is extremely suitable because the strength and adhesion are further improved and the frictional force around the pile is increased. It is. The granulated slag is a glassy fine particle of approximately 3 mm or less obtained by quenching slag discharged from a blast furnace with water, or a pulverized product obtained by finely pulverizing this fine particle. Steelmaking slag is slag discharged from a steelmaking furnace and gradually cooled. This is crushed and used as the fine aggregate.
[0006]
Next, the method of the present invention is characterized by stirring the ground using the above-described pile periphery fixing liquid, forming a stirring portion in the ground where the underground pile should be set, and setting the pile in the stirring portion. This is a method for creating underground piles.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The pile circumference fixing liquid agitates and mixes with the excavated soil to form an agitated portion with the excavated soil in the ground, and this agitated material fills the space around the pile circumferential surface, and the frictional force and horizontal resistance force of the pile circumferential surface are increased. It is a liquid intended to ensure. Conventionally, cement milk having a water cement ratio W / C of 60 to 80% by mass was used, and the standard injection amount was 20 to 30% by volume of the volume of the stirring unit. Here, the volume of the stirring section is the product of the excavation cross-sectional area and the depth in the pile circumference fixed liquid injection section. The present invention provides a pile fixing liquid that is different from conventional cement milk.
[0008]
Hereinafter, the reason for the numerical limitation of the pile circumference fixing liquid of the present invention will be described. The pile periphery fixing liquid of the present invention is composed of cement and water mixed with blast furnace slag fine powder as main components.
[0009]
Blast furnace slag fine powder mixed cement: As the cement of 6 to 11 parts by mass, blast furnace slag fine powder mixed cement is used. In addition to Type B blast furnace cement specified by JIS, use a mixture of ordinary Portland cement and fine powder of blast furnace slag. Blast furnace cement is mixed with 30 to 60% by mass of blast furnace slag, and is characterized by superior durability and enhanced long-term strength, while having a low heat of hydration compared to ordinary Portland cement. 6-11 parts by mass of cement containing blast furnace slag fine powder is mixed with 4 to 6.5 parts by mass of water. If the amount is less than 6 parts by mass, the strength does not reach the desired value, so the amount is more than this.
[0010]
Water: 4 to 6.5 parts by mass Water is determined in relation to the mass part of cement mixed with blast furnace slag fine powder, and is 4 to 6.5 parts by mass. A water cement ratio of 40-80% is appropriate.
[0011]
Fine aggregate: 8 parts by mass or less As fine aggregate, sand of 5 mm or less is used. Moreover, the one part or all quantity can be substituted with granulated slag or steelmaking slag. Granulated slag as an aggregate enhances the strength of the stirring section, has a high shear resistance, and the fine powder contributes to the enhancement of long-term strength by the pozzolanic effect. Addition of more than 8 parts by mass with respect to 6 to 11 parts by mass of the blast furnace slag fine powder-mixed cement decreases the fluidity of the pile periphery fixing liquid, and also impairs uniform miscibility with soil, so the upper limit is 8 parts by mass. It was. The lower limit can be appropriately determined depending on the original geology of the stirring unit, and may be 0 for a very good sandy layer, for example.
[0012]
Anhydrous gypsum: 5-15% by mass with respect to cement mixed with blast furnace slag fine powder
Anhydrite intended to agitation part confers a property that expands with the curing is insufficient expandable is less than 5% by weight, based on the blast furnace slag cement, rather stirring unit exceeds 15 mass% There is a problem in that the strength of the material is reduced, and the cost is increased.
[0013]
Thickener: 0.1 to 0.3% by mass based on the total of cement and anhydrous gypsum mixed with blast furnace slag fine powder
The thickener prevents the fine aggregate, granulated slag or steelmaking slag in the stirring part from separating and settling, and facilitates kneading. Poor, the effect is less than 0.1 wt% based on the total amount of blast furnace slag cement and anhydrite, be added beyond 0.3 wt%, the effect is saturated, 0.1 The content was 0.3% by mass . Methyl cellulose may be used as the thickener.
[0014]
Water reducing agent: 3% by mass or less based on the total amount of cement and anhydrous gypsum mixed with blast furnace slag fine powder The water reducing agent has an excellent effect of dispersing the powder, and can reduce the unit water volume. Even if a large amount of water reducing agent is used, there is little increase in the effect, and it is better to make it 3% by mass or less. As the water reducing agent, it is preferable to use Mighty-150 (MT-150) manufactured by Kao Corporation.
[0015]
The method of the present invention stirs the ground using the above-described pile periphery fixing liquid, forms a stirring portion in which the underground pile is to be laid, and sinks the pile in the stirring portion. This is a method of building piles. At this time, the injection amount of the pile periphery fixing liquid is 20 to 40% by volume with respect to the volume of the stirring portion, and is managed using a flow meter. The excavation shaft is pulled up at a speed of about 1 to 3 m / min so as not to loosen the ground or collapse the hole wall during excavation agitation.
[0016]
【Example】
Next, examples of the present invention will be described. As shown in Table 1, the pile circumference fixing liquid No. 1 and no. No. 2 and pile fixing liquid No. 1 containing blast furnace cement as a main component and added with gypsum, thickener and water reducing agent. 3 and no. 4 was prepared. The composition in the table is indicated by the amount added per 1 m 3 of the pile circumference fixing liquid. These pile circumference fixing liquids were mixed with earth and sand, and the changes in compression strength and length of the molded products were examined. FIG. 1 shows the transition of changes in days and length. The example using the blast furnace cement shows a preferable change in length (expansion).
[0017]
This expansion is due to the formation of an agitation part in the ground, the pile being submerged therein, and when the date and time has passed and the agitation part has hardened, the frictional force and tightening force around the pile increase, and the pile support force Indicates an increase. This expansion works effectively up to 6000 × 10 −6 , and if it exceeds this, the pore wall weakens instead, which is disadvantageous. From the results shown in Table 1 and FIG. In No. 1, shrinkage occurred and no. At 2, weak expansion occurs. No. 3 and no. In No. 4, the effects of blast furnace cement and gypsum are remarkable, and it is recognized that the thickener and the water reducing agent have a preferable action during construction.
[0018]
Next, the compressive strength and the length change were investigated about the stirring mixture of the pile periphery fixing liquid of the composition shown in Table 2, and earth and sand. The formulation display is the same as in Table 1. FIG. 5, no. 6, no. 7 shows a change in length. No. The one using 6 blast furnace cement shows the best performance.
[0019]
Next, a stirring portion having a diameter of 600 mmφ and a depth of 8 m was formed on the sandy ground layer using a pile circumference fixing liquid having the composition shown in Table 3. The formulation display is the same as in Table 1. Up to a depth of 4 m is viscous soil, and below that is a sand layer with an N value of about 30. Immediately after the stirrer was stirred, a vinyl chloride pipe was pushed vertically into the center of the stirrer from above. After the lapse of 28 days after the formation of the stirring portion, the vinyl chloride pipe was pulled up and pulled out, and the drawn vinyl chloride pipe was cut every 1 m in length to examine the compressive strength of the core inside. The results are shown in Table 4. C in Table 4 is No. in Table 3. The stirring part was formed using the conventional pile circumference fixing liquid shown in Fig. 9, and the strength could not be measured up to 2 m from the ground surface, and the pile bottom was about 1 MPa. B and A in Table 4 are Nos. In Table 3. A stirrer is formed using the pile periphery fixing solution of the present invention shown in FIG. 8, where B is the same stir mix as C, and A is a stiffer stirrer. In B, the compressive strength exceeds 5 MPa at the bottom of the pile, and further, in A, it is improved to about 7 MPa, indicating that the pile periphery fixing liquid of the present invention has an excellent effect.
[0020]
[Table 1]
[Table 2]
[Table 3]
[Table 4]
【The invention's effect】
According to the present invention, a high-strength agitation part can be formed, which greatly contributes to an improvement in the bearing capacity of the pile.
[Brief description of the drawings]
FIG. 1 is a graph showing a change with time of an expansion coefficient.
FIG. 2 is a graph showing a change with time of an expansion coefficient.
Claims (4)
水：４〜６．５質量部
無水石膏：高炉スラグ微粉末混入セメントに対して
５〜１５質量％、
増粘剤：高炉スラグ微粉末混入セメントと無水石膏の合計に対して
０．１〜０．３質量％、
減水剤：高炉スラグ微粉末混入セメントと無水石膏の合計に対して
３質量％以下
からなることを特徴とする杭周固定液。Blast furnace slag fine powder mixed cement: 6-11 parts by mass,
Water: 4 to 6.5 parts by mass Anhydrous gypsum: For cement containing blast furnace slag fine powder
5 to 15% by mass ,
Thickener: To the total of cement and anhydrous gypsum mixed with blast furnace slag fine powder
0.1 to 0.3% by mass ,
Water reducing agent: Total of cement and anhydrous gypsum mixed with blast furnace slag fine powder
Pile circumference fixing liquid, comprising 3% by mass or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002082362A JP3831282B2 (en) | 2002-03-25 | 2002-03-25 | Pile circumference fixing liquid and underground pile creation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002082362A JP3831282B2 (en) | 2002-03-25 | 2002-03-25 | Pile circumference fixing liquid and underground pile creation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003277738A JP2003277738A (en) | 2003-10-02 |
| JP3831282B2 true JP3831282B2 (en) | 2006-10-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4546313B2 (en) * | 2005-04-05 | 2010-09-15 | ジャパンパイル株式会社 | Pile circumference filling liquid |
| JP5330895B2 (en) * | 2008-05-19 | 2013-10-30 | 克紀 綾野 | Molded product formed by molding mortar or concrete composition |
| JP6006381B1 (en) * | 2014-11-11 | 2016-10-12 | 隆夫 中野 | Ready-made pile embedding method |
| CN113718761B (en) * | 2021-09-09 | 2023-02-03 | 中国铁建港航局集团有限公司 | Method for forming coastal soft soil foundation cement soil composite mixing pile |
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