JP5208588B2 - Injection material construction method - Google Patents
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- JP5208588B2 JP5208588B2 JP2008152111A JP2008152111A JP5208588B2 JP 5208588 B2 JP5208588 B2 JP 5208588B2 JP 2008152111 A JP2008152111 A JP 2008152111A JP 2008152111 A JP2008152111 A JP 2008152111A JP 5208588 B2 JP5208588 B2 JP 5208588B2
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Description
本発明は、注入材の施工方法に関する。 The present invention relates to an injection material construction method.
注入材としては、以下の製造方法が知られている（特許文献１〜４）。
本発明は、特許文献１〜４よりも、止水性を改良するものである。 The present invention improves water-stopping performance more than Patent Documents 1 to 4.
本発明は、浸透性が良く地山改良効果に優れた注入材の施工方法を提供する。 The present invention provides a method for constructing an injection material having good permeability and excellent ground improvement effect.
即ち、本発明は、予め消石灰０．１〜１０質量部と水１００質量部を含有するＢ材、予めポゾラン物質１００質量部と水２００〜６００質量部を含有するＡ材の順に、Ａ材とＢ材の混合比率は質量比で、２：１〜１：２になるように、注入する注入材の施工方法であり、Ａ材が予め分散剤を、ポゾラン物質１００質量部に対して、０．５〜３質量部含有する該注入材の施工方法であり、ポゾラン物質が球状シリカである該注入材の施工方法であり、分散剤量が、ナフタリン系減水剤とメラミン系減水剤からなる群のうちの１種以上である該注入材の施工方法である。 That is, the present invention is previously hydrated lime 0.1 to 10 parts by weight of B material containing 100 parts by mass of water, in the order of A material containing pre-pozzolanic material 100 parts by weight of water 200 to 600 parts by weight, and the material A The mixing ratio of the material B is a construction method of the injecting material to be injected so that the mass ratio is 2: 1 to 1: 2 , and the material A is preliminarily dispersed with 100 parts by mass of the pozzolanic substance. .5-3 parts by mass of the injection material construction method, wherein the pozzolanic material is spherical silica, and the amount of dispersant is a group consisting of a naphthalene water reducing agent and a melamine water reducing agent. It is the construction method of this injection material which is 1 or more types .
本発明の注入材の施工方法は浸透性が良く、優れた地山改良効果を奏することができる。 The construction method of the injection material of the present invention has good permeability and can exhibit an excellent ground improvement effect.
ポゾラン物質として、フライアッシュ、シリカヒューム、及び球状シリカ等のシリカ質物質等が挙げられる。これらの中では、浸透性の点で、シリカヒューム及び／又は球状シリカが好ましく、球状シリカがより好ましい。球状シリカとしては、平均粒径１μｍ以下に粉砕した原料珪石を高温の火炎中で溶融し、球状にした球状シリカが好ましい。 Examples of the pozzolanic material include siliceous materials such as fly ash, silica fume, and spherical silica. Among these, silica fume and / or spherical silica is preferable, and spherical silica is more preferable in terms of permeability. As the spherical silica, spherical silica obtained by melting raw material silica, which has been pulverized to an average particle size of 1 μm or less, in a high-temperature flame and making it spherical is preferable.
予めポゾラン物質と水を含有するＡ材は水に予め分散して製造する。 A material containing a pozzolanic substance and water in advance is produced by dispersing in water.
Ａ材の水の使用量は、ポゾラン物質１００質量部に対して、１００〜２０００質量部が好ましく、２００〜６００質量部がより好ましい。水量が少ないと浸透性が悪くなり好ましくない傾向がある。水量が多いと強度が弱くなり好ましくない傾向がある。 100-2000 mass parts is preferable with respect to 100 mass parts of pozzolanic substances, and the usage-amount of the water of A material is more preferable 200-600 mass parts. If the amount of water is small, the permeability tends to be poor, which tends to be undesirable. If the amount of water is large, the strength tends to be weak, which tends to be undesirable.
又、分散性を高めるためＡ材に分散剤を併用することも可能である。分散剤として、市販のセメント減水剤が使用できる。分散剤の使用量は、ポゾラン物質１００質量部に対して、０．５〜３質量部が好ましく、１〜２質量部がより好ましい。分散剤の量が少ないと浸透性が悪くなり好ましくない傾向がある。分散剤の量が多いと強度が弱くなり好ましくない傾向がある。 In order to improve dispersibility, it is possible to use a dispersant in combination with the A material. A commercially available cement water reducing agent can be used as the dispersant. 0.5-3 mass parts is preferable with respect to 100 mass parts of pozzolanic substances, and, as for the usage-amount of a dispersing agent, 1-2 mass parts is more preferable. If the amount of the dispersing agent is small, the permeability tends to deteriorate, which tends to be undesirable. If the amount of the dispersing agent is large, the strength tends to be weak, which tends to be undesirable.
予めカルシウム含有物質と水を含有するＢ材は、カルシウム含有物質を水に予め分散又は溶解して製造する。 The B material containing a calcium-containing substance and water in advance is produced by dispersing or dissolving the calcium-containing substance in water in advance.
カルシウム含有物質としては、セメント、消石灰、生石灰、石膏等の無機物質、ギ酸カルシウム等の有機酸のカルシウム塩等が挙げられる。これらの中では、浸透性の点で、消石灰が好ましい。 Examples of the calcium-containing substance include inorganic substances such as cement, slaked lime, quicklime and gypsum, and calcium salts of organic acids such as calcium formate. Among these, slaked lime is preferable in terms of permeability.
カルシウム含有物質の使用量は水１００質量部に対して、０．１〜１０質量部が好ましく、０．５〜５質量部がより好ましい。カルシウム含有物質の使用量が少ないと強度が弱くなり好ましくない傾向がある。カルシウム含有物質の使用量が多いと浸透性が悪くなり好ましくない傾向がある。 0.1-10 mass parts is preferable with respect to 100 mass parts of water, and, as for the usage-amount of a calcium containing substance, 0.5-5 mass parts is more preferable. If the amount of the calcium-containing substance used is small, the strength tends to be weak, which tends to be undesirable. When the amount of the calcium-containing substance used is large, the permeability tends to deteriorate, which tends to be undesirable.
又、分散性を高めるためＢ材に分散剤を併用することも可能である。 Further, in order to improve dispersibility, it is possible to use a dispersant in combination with the B material.
Ａ材とＢ材の混合比率は地山の条件によって異なるので特に限定されるものではない。Ａ材とＢ材の混合比率は質量比で、２：１〜１：２が好ましく、１：１がより好ましい。 Since the mixing ratio of A material and B material changes with conditions of natural ground, it is not specifically limited. The mixing ratio of the A material and the B material is a mass ratio, preferably 2: 1 to 1: 2, and more preferably 1: 1.
Ａ材を先に注入する場合、Ａ材は設計量を注入した後、Ｂ材を圧力上昇が認められるまで注入すればよい。又、逆にＢ材を先に注入する場合も同様な方法で注入すればよい。 In the case of injecting the A material first, the A material may be injected until the pressure rise is recognized after the design amount is injected. Conversely, when the B material is injected first, the same method may be used.
本発明は、Ａ材とＢ材からなる注入材において、Ａ材とＢ材をそれぞれ別々に注入するのが特徴である。注入する順序はＢ材を先に注入した後、Ａ材を注入する方法が、地山の改良効果が大きく、地山の透水係数を小さくできる点で、好ましい。 The present invention is characterized in that the A material and the B material are separately injected in the injection material composed of the A material and the B material. The method of injecting the material B after the material B is injected first is preferable in that the effect of improving the natural ground is large and the hydraulic conductivity of the natural ground can be reduced.
注入材は、スクイズポンプやプランジャーポンプ等の通常のグラウトポンプで注入できる。又、空気で圧送することもできる。 The injection material can be injected with a normal grout pump such as a squeeze pump or a plunger pump. It can also be pumped with air.
実施例１
平均粒径１μｍ以下に粉砕した原料珪石を高温の火炎中で溶融し、球状シリカを製造した。球状シリカ１００質量部と、水４００質量部を混合してＡ材を製造した。一方、消石灰（試薬）１質量部と、水１００質量部を混合してＢ材を製造した。Ａ材とＢ材を表１に示す順序に従い、１．５ｍＰａの圧力で注入した。注入材の透水係数と圧縮強度を測定し、表１に示した。Ａ材とＢ材を、質量比で等量ずつ混合した。
Example 1
Raw material silica stone ground to an average particle size of 1 μm or less was melted in a high-temperature flame to produce spherical silica. A material A was produced by mixing 100 parts by weight of spherical silica and 400 parts by weight of water. On the other hand, B material was manufactured by mixing 1 part by mass of slaked lime (reagent) and 100 parts by mass of water. In accordance with the order shown in Table 1, A material and B material were injected at a pressure of 1.5 mPa. The water permeability coefficient and compressive strength of the injection material were measured and are shown in Table 1. A material and B material were mixed in equal amounts by mass ratio.
（評価方法）
透水係数：地盤工学会基準のＪＧＳ０８３１に準ずる注入装置を用いた。５０ｃｍの試料槽に７号珪砂を充填し、注入試験を行った。１日後、水を用いて透水係数を測定した。
強度：透水係数を測定した試料槽から硬化物を取り出し、長さ１０ｃｍに切断し、アムスラー型圧縮試験機で圧縮強度を測定した。
(Evaluation method)
Permeability coefficient: An injection device according to JGS0831 of the Japan Geotechnical Society standard was used. A 50 cm sample tank was filled with No. 7 silica sand and an injection test was conducted. One day later, the water permeability was measured using water.
Strength: The cured product was taken out from the sample tank whose water permeability was measured, cut into a length of 10 cm, and the compressive strength was measured with an Amsler type compression tester.
実験Ｎｏ．２のＡ材のみ注入の場合と実験Ｎｏ．６のＢ材のみ注入の場合は、何も注入していない実験Ｎｏ．１とほぼ同等の透水係数であり、浸透性が劣っていた。実験Ｎｏ．５のＡ材とＢ材を同時注入した場合は、注入材が直ちに硬化してしまい、注入ができなかった。一方、本願発明の実験Ｎｏ．３、本願発明の実験Ｎｏ．４は、実験Ｎｏ．１より透水係数が小さく、止水性や浸透性が優れ、圧縮強度が優れていた。特にＢ材を先に注入した実験Ｎｏ．４は、止水性や浸透性の効果が顕著であった。 Experiment No. No. 2 material A injection and experiment No. In the case of injecting only the B material of No. 6, no. The permeability coefficient was almost the same as 1, and the permeability was poor. Experiment No. When the A material and the B material of No. 5 were injected at the same time, the injected material was immediately cured and the injection could not be performed. On the other hand, in the experiment No. 1 of the present invention, 3. Experiment No. 1 of the present invention. 4 is an experiment No. The water permeability coefficient was smaller than 1, water-stopping and permeability were excellent, and the compressive strength was excellent. In particular, Experiment No. 1 in which the B material was injected first. No. 4 had remarkable water-stopping and penetrating effects.
実施例２
球状シリカ１００質量部、水４００質量部、表２に示す量の分散剤を混合してＡ材を製造し、Ａ材とＢ材を実験Ｎｏ．３に示す順序に従い、注入し、注入材の透水係数と圧縮強度を測定したこと以外は、実施例１と同様に行った。結果を、表２に示した。ここで、ＦＴ−５００はナフタリン系の減水剤であり、ＦＴ−８０はナフタリン系の減水剤であり、ＦＴ−７００ＮＬはメラミン系の減水剤である。
Example 2
100 parts by weight of spherical silica, 400 parts by weight of water, and a dispersant of the amount shown in Table 2 were mixed to produce A material. In the same manner as in Example 1, except that the injection was performed according to the order shown in 3 and the water permeability coefficient and compressive strength of the injection material were measured. The results are shown in Table 2. Here, FT-500 is a naphthalene-based water reducing agent, FT-80 is a naphthalene-based water reducing agent, and FT-700NL is a melamine-based water reducing agent.
分散剤を適量使用することにより、実験Ｎｏ．３より透水係数が小さく、止水性や浸透性が優れ、圧縮強度が優れていた。 By using an appropriate amount of the dispersant, Experiment No. The water permeability coefficient was smaller than 3, water-stopping and permeability were excellent, and the compressive strength was excellent.
本発明の注入材の施工方法は、止水性、浸透性、強度発現性が大きい。本発明の注入材の施工方法は地山改良の他に、コンクリートのひび割れ補修の用途にも適応できる。 The construction method of the injection material of the present invention has a large water-stopping property, permeability, and strength development. The construction method of the injection material of the present invention can be applied not only to natural ground improvement but also to concrete crack repair applications.
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| JP2011026572A (en) * | 2009-07-01 | 2011-02-10 | Denki Kagaku Kogyo Kk | Grouting material and grouting workpiece |
| WO2011115245A1 (en) * | 2010-03-19 | 2011-09-22 | 電気化学工業株式会社 | Injection material for repairing cracks in concrete, method for manufacturing same, and injection method using same |
| JP5390442B2 (en) * | 2010-03-19 | 2014-01-15 | 戸田建設株式会社 | How to repair cracks in mortar or concrete at a radioactive waste disposal site |
| JP5734642B2 (en) * | 2010-12-21 | 2015-06-17 | 電気化学工業株式会社 | Method for producing inorganic coating composition |
| WO2012108360A1 (en) * | 2011-02-08 | 2012-08-16 | 電気化学工業株式会社 | Filling material, method for producing filling material, and filling method |
| WO2012108359A1 (en) * | 2011-02-08 | 2012-08-16 | 電気化学工業株式会社 | Filling material for repairing concrete cracks, and filling method |
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| JPH0794660B2 (en) * | 1992-01-29 | 1995-10-11 | 強化土エンジニヤリング株式会社 | Ground injection method |
| JPH0841455A (en) * | 1994-07-29 | 1996-02-13 | Japan Found Eng Co Ltd | Production of ultrafine slurry having highly dispersed and low viscous state and method for solidifying ground by pouring the ultrafine slurry |
| JP4275618B2 (en) * | 2004-12-27 | 2009-06-10 | 電気化学工業株式会社 | Highly permeable ground injection material |
| JP5165201B2 (en) * | 2006-02-14 | 2013-03-21 | 電気化学工業株式会社 | Injection material, manufacturing method thereof, and injection method using the same |
| JP5189274B2 (en) * | 2006-11-10 | 2013-04-24 | 電気化学工業株式会社 | Ground injection material and ground injection method using the same |
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