JP5862911B2 - 地盤改良土および地盤改良方法 - Google Patents
地盤改良土および地盤改良方法 Download PDFInfo
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- JP5862911B2 JP5862911B2 JP2014183517A JP2014183517A JP5862911B2 JP 5862911 B2 JP5862911 B2 JP 5862911B2 JP 2014183517 A JP2014183517 A JP 2014183517A JP 2014183517 A JP2014183517 A JP 2014183517A JP 5862911 B2 JP5862911 B2 JP 5862911B2
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- 239000002689 soil Substances 0.000 title claims description 57
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- 239000000463 material Substances 0.000 claims description 84
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 61
- 239000000920 calcium hydroxide Substances 0.000 claims description 58
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 58
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 58
- 239000002893 slag Substances 0.000 claims description 54
- 238000007711 solidification Methods 0.000 claims description 36
- 230000008023 solidification Effects 0.000 claims description 36
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 31
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- 238000004898 kneading Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 description 74
- 239000010440 gypsum Substances 0.000 description 40
- 229910052602 gypsum Inorganic materials 0.000 description 40
- 238000009472 formulation Methods 0.000 description 33
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 27
- 150000004683 dihydrates Chemical class 0.000 description 27
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 25
- 239000004568 cement Substances 0.000 description 23
- 238000010828 elution Methods 0.000 description 17
- 239000000292 calcium oxide Substances 0.000 description 12
- 235000012255 calcium oxide Nutrition 0.000 description 12
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 12
- 239000005995 Aluminium silicate Substances 0.000 description 10
- 235000012211 aluminium silicate Nutrition 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000013329 compounding Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000012669 compression test Methods 0.000 description 4
- 238000007596 consolidation process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000011575 calcium Substances 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000002734 clay mineral Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910052622 kaolinite Inorganic materials 0.000 description 2
- 238000009533 lab test Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
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- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- KSPIHGBHKVISFI-UHFFFAOYSA-N Diphenylcarbazide Chemical compound C=1C=CC=CC=1NNC(=O)NNC1=CC=CC=C1 KSPIHGBHKVISFI-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 239000004021 humic acid Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Description
前記アロフェン系の火山灰質粘性土100重量部に対して、地盤改良用固化材55〜70重量部が配合され、当該地盤改良用固化材は、4週目の一軸圧縮強度が目標強度である425kN/m2以上になるように、高炉スラグ100重量部に対して、消石灰25〜50重量部と、半水石膏25〜50重量部と、が配合されたものであり、
前記目標強度である425kN/m2は、住宅地盤の許容応力度目標値を3tf/m2、安全率を3として、抜き取りコアの平均一軸圧縮強度qufを逆算し、さらに(現場/室内)強さ比を0.5と設定して求めたものであることを特徴とする。
の発現強度を得ることができる。
まず、本実施例の地盤改良用固化材と比較するために、従来のセメント系固化材をカオリン粘土に混合した配合例A〜Dの配合及び結果を表3に示す。
次に、配合例1〜6の配合及び結果を表4に示す。
次に、配合例7〜13の配合及び結果を表5に示す。
次に、配合例14〜21の配合及び結果を表6に示す。
表8に、配合例22〜29の配合及び結果を示す。
重量部に対して高炉スラグ40重量部を配合すればより強度が安定することがわかる。
利用することができる。
Claims (2)
- アロフェン系の火山灰質粘性土と地盤改良用固化材とが混練されて水和反応を生じて形成される地盤改良土であって、
前記アロフェン系の火山灰質粘性土100重量部に対して、地盤改良用固化材55〜70重量部が配合され、当該地盤改良用固化材は、4週目の一軸圧縮強度が目標強度である425kN/m2以上になるように、高炉スラグ100重量部に対して、消石灰25〜50重量部と、半水石膏25〜50重量部と、が配合されたものであり、
前記目標強度である425kN/m2は、住宅地盤の許容応力度目標値を3tf/m2、安全率を3として、抜き取りコアの平均一軸圧縮強度qufを逆算し、さらに(現場/室内)強さ比を0.5と設定して求めたものであることを特徴とする地盤改良土。 - アロフェン系の火山灰質粘性土と地盤改良用固化材とを混練する地盤改良方法であって、
前記アロフェン系の火山灰質粘性土100重量部に対して、請求項1に記載の地盤改良用固化材55〜70重量部を混入し、撹拌することを特徴とする地盤改良方法。
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Cited By (1)
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JP2018141266A (ja) * | 2017-02-24 | 2018-09-13 | 株式会社 Gtスパイラル | 地盤補修工法及びそれに用いる固化剤 |
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KR101863673B1 (ko) * | 2017-11-07 | 2018-06-01 | 한우선 | 고함수토용 개질안정처리제와 그 제조방법 및 이를 이용한 고함수토의 처리방법 |
JP6529146B2 (ja) * | 2018-04-13 | 2019-06-12 | 株式会社上村開発 | 地盤改良方法 |
JP7231513B2 (ja) * | 2019-08-05 | 2023-03-01 | 株式会社不動テトラ | 流動化砂組成物 |
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JPS54113910A (en) * | 1978-02-24 | 1979-09-05 | Onoda Cement Co Ltd | Improving material of organic matter soft ground |
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JP2018141266A (ja) * | 2017-02-24 | 2018-09-13 | 株式会社 Gtスパイラル | 地盤補修工法及びそれに用いる固化剤 |
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