Author(s)
重松, 宏明; 東, 真吾; 池村, 太伸; 澤本, 洋平; 林, 宗平; 能澤,
真周; 八嶋, 厚
Citation
[土木学会論文集C] vol.[62] no.[2] p.[429]-[439]
Issue Date
2006-07-20
Rights
Japan Society of Civil Engineers (土木学会)
Version
出版社版 (publisher version) postprint
URL
http://hdl.handle.net/20.500.12099/27401
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7 1ᱜળຬ ⍹ᎹᎿᬺ㜞╬ኾ㐷ቇᩞഥᢎ ⅣႺㇺᏒᎿቇ⑼㧔ޥ929-0392 ⍹Ꮉ⋵ᴡർᵤᐈ↸ർਛ᧦㧕 [email protected] 2ᄢᵗࠦࡦࠨ࡞࠲ࡦ࠻㧔ᩣ㧕㧔ޥ921-8066 ⍹Ꮉ⋵㊄ᴛᏒ⍫ᧁ 3 ৼ⋡ 74 ⇟㧕 3⍹ᎹᎿᬺ㜞╬ኾ㐷ቇᩞ ⅣႺᑪ⸳Ꮏቇኾ㧔ޥ929-0392 ⍹Ꮉ⋵ᴡർᵤᐈ↸ർਛ᧦㧕 4㧔ᩣ㧕࿖㐿⊒ࡦ࠲㧔ޥ920-0031 ⍹Ꮉ⋵㊄ᴛᏒᐢጟ 3 ৼ⋡ 1 ⇟ 1 ภ㊄ᴛࡄࠢࡆ࡞ 11F㧕 5ടᎺᑪ⸳㧔ᩣ㧕㧔ޥ920-0805 ㊄ᴛᏒዊ㊄↸ 3 ⇟ 31 ภ㧕 6ᱜળຬ ⍹ᎹᎿᬺ㜞╬ኾ㐷ቇᩞⅣႺㇺᏒᎿቇ⑼ᛛⴚኾ㐷⡯ຬ㧔ޥ929-0392 ⍹Ꮉ⋵ᴡർᵤᐈ↸ർਛ᧦㧕 7ᱜળຬ ጘ㒂ᄢቇᢎ Ꮏቇㇱ␠ળၮ⋚Ꮏቇ⑼㧔ޥ501-1193 ጘ㒂Ꮢᩉᚭ 1-1㧕 㤛㋕㋶ߩ㉄ൻᔕߦࠃࠆ⋚ߩ㉄ᕈൻߪ㧘⾰․ᕈࠍᄢ߈ߊᄌൻߐߖ㧘႐วߦࠃߞߡߪᴺ㕙፣უߥߤߩ ⋚ἴኂࠍᒁ߈ߎߔේ࿃ߦ߽ߥࠆ㧚ߘߎߢᧄ⎇ⓥߪ㧘㤛㋕㋶ࠍߔࠆ☼ᕈ⹜ᢱࠍᲑ㓏⊛ߦ㉄ᕈൻߐߖ㧘 ৻ㅪߩቶౝታ㛎ࠍታᣉߒ㧘㤛㋕㋶ߩ㉄ൻߦ߁⋚ߩ㉄ᕈൻ߇ᄌᒻᒝᐲ․ᕈ㧘ࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇ߦ ߤߩࠃ߁ߥᓇ㗀ࠍ߷ߔߩ߆ࠍࠄ߆ߦߒߚ㧚߹ߚ㧘㕖ᵴᕈߢ⍮ࠄࠇࠆࠞࠝࡦߦỚᐲߩ⇣ߥࠆ⎫㉄ࠍട ߃㧘ห᭽ߩ⹜㛎ࠍⴕ㧘⎫㉄ߦࠃࠆ㉄ᕈൻ߇⾰․ᕈߦ߷ߔᓇ㗀ߦߟߡ߽ᛠីߒߚ㧚ߐࠄߦ㧘ታ㓙ߦ ፣უߒߚ㉄ᕈ⋚߆ࠄߥࠆಾᴺ㕙ߦߟߡቯ⸃ᨆࠍⴕ㧘⋚߇ਛᕈ߆ࠄᒝ㉄ᕈߦ⥋ࠆ߹ߢߩ㑆ߦ ᴺ㕙ߩቯᕈ߇ߤߩ⒟ᐲᄬࠊࠇࠆߩ߆ߦߟߡ߽ᬌ⸛ߒߚ㧚Key Words: pyrite, cohesive soil, consistency limit, unconfined compression test, sulfate content, pH, slope stability 㧝㧚✜⸒ ⍹Ꮉ⋵ߦၸⓍߔࠆ⋚ߩᄙߊߪ㧘ਛߦ౮⌀ ߦ ␜ߔࠃ߁ߥ㤛㋕㋶㧔pyrite㧘FeS2㧕ߣ߫ࠇࠆ㋶‛ࠍ ߒߡࠆ㧚㤛㋕㋶ࠍߔࠆ⋚ߪ㧘ਛߦ߅ߡ ㆶర⁁ᘒߦࠆ႐วߪਛᕈࠍ␜ߔ߇㧘ជߥߤߦࠃ ߞߡ߇৻ᣤᄢ᳇ߦᦑߐࠇࠆߣ㧘ߘߩ⋥ᓟ߆ࠄ㤛㋕ ㋶ߣ㉄⚛߇ᔕߒᆎ㧘ᓢޘߦ㉄ᕈൻ߇ㅴⴕߔࠆ㧚 ߹ߚ㧘㤛㋕㋶ߪ߆ࠄଏ⛎ߐࠇࠆ㉄⚛ߦࠃߞߡਅ ⸥ߦ␜ߔࠃ߁ߥൻቇᔕ߇ߎࠅ㧘㉄ൻ㋕㧔Fe2O3㧕 ߿᳓㉄ൻ㋕㧔FeOOH㧕㧘߅ࠃ߮⎫㉄㧔H2SO4㧕ࠍ↢ߓ ߐߖࠆ㧚ߘߩ⚿ᨐ㧘⋚ߪᒝ㉄ᕈࠍߔࠆࠃ߁ߦ ߥࠆ㧚ߚߛߒ㧘㤛㋕㋶ߩ㉄ൻᔕߪ㧘ታ㓙ߦߪࡃࠢ ࠹ࠕ㧔㋕⚦⩶㧕߽㑐ਈߔࠆⶄ㔀ߥᔕߢࠆߎߣ ߦᵈᗧߒߚ1)㧚
4FeS2㧗15O2㧗10H2O ψ 4FeOOH㧗8H2SO4 4FeS2㧗15O2㧗8H2O ψ 2Fe2O3㧗8H2SO4 ㄭᐕ㧘⍹Ꮉ⋵ᴡർᵤᐈ↸ౝߦ߅ߡ㧘㤛㋕㋶ ߩ㉄ൻᔕߦࠃߞߡ㉄ᕈൻ㧔એᓟ㧘නߦޟ㉄ᕈൻޠ ౮⌀ 㤛㋕㋶ߩ㔚ሶ㗼ᓸ㏜౮⌀ ߣ߁㧕ߒߚ☼ᕈ⋚߆ࠄߥࠆᴺ㕙߇፣უߒߚ ߇ࠆ2),3)㧚㧘㉄ᕈൻߒߚ⋚ߩਇቯൻ߇ᄢ ᄌᄢ߈ߥ㗴ߣߥߞߡࠆ㧚ᓟ㧘Ṗߥၞ㐿⊒㧘 ߽ߒߊߪ⋚㒐ἴߩߚߦߪ㧘ᴺ㕙ߥߤߩ⸳⸘ߦ㧘 ߩᄌᒻᒝᐲ․ᕈߦ߷ߔ㉄ᕈൻߩᓇ㗀ࠍ⋓ࠅㄟ ᔅⷐ߇ࠆ㧚ߘߩߚߦߪ㧘㉄ᕈൻ߇ㅴⴕߔࠆߎ ߣߦࠃߞߡ㧘ߩ⾰․ᕈ߇ߤߩࠃ߁ߦᄌൻߔࠆߩ ߆ࠍᛠីߒߥߌࠇ߫ߥࠄߥ㧚 0.002mm
㉄ᕈൻߒߚ㧘ࠊࠁࠆ㉄ᕈߦ㑐ߔࠆ⎇ⓥߪ㧘 ߎࠇ߹ߢᢙᄙߊႎ๔ߐࠇߡࠆ߇㧘ߘߩᄙߊߪੱᎿ ⊛ߦ㉄ᕈࠕ࡞ࠞᕈߦᄌൻߐߖߚߦኻߒߡታᣉ ߐࠇߚ߽ߩߢࠆ4)-9)㧚ᧄ⺰ᢥߢ⼏⺰ߔࠆࠃ߁ߥ㤛㋕ ㋶ߦ㑐ߔࠆ⎇ⓥߦߟߡߪᲧセ⊛ዋߥ㧚એਅߦ㧘 㤛㋕㋶ߦ㑐ㅪߔࠆ㉄ᕈߦߟߡ㧘ߎࠇ߹ߢ♽⛔ߛ ߞߡታᣉߐࠇߡ߈ߚ⎇ⓥࠍ⚫ߒߡ߅ߊ㧚 ਛࠄ10)ߪ㧘㤛㋕㋶ߩၸⓍ‛ਛߢߩ㊂ߪ㧘ේ ᢱ‛⾰ߢࠆ⎫㉄ࠗࠝࡦ㧔SO42-㧕Ớᐲ㧘㉄ൻㆶర㔚 㧔ORP㧕㧘ㆶరࡃࠢ࠹ࠕߩߚߩᯏ‛㊂ߩ㧟ߟ ߢ߹ࠆߎߣࠍታ㛎ߢ⏕߆ߚ㧚ජᧁ⦟11), 12)ߪ㧘ၸ Ⓧᕈエጤߩൻቇ⊛㘑ൻߦ㧘㤛㋕㋶ߩ㉄ൻߦ߁⎫㉄ ߩ↢ᚑ߇ᄢ߈ߊ㑐ਈߒߡࠆߎߣ㧘↢ᚑߐࠇߚ⎫㉄ ߦࠃߞߡጤ⍹ߩᒝᐲ߇⪺ߒߊૐਅߒߡߊߎߣߥߤ ࠍႎ๔ߒߡࠆ㧚ᄢጊࠄ13)ߪ㧘ጤ⍹ਛߩ㤛㋕㋶ߩ㉄ ൻߦ߁⎫㉄ߩ↢ᚑߦࠃߞߡᒁ߈ߎߐࠇࠆ⋚⤘ࠇ ⽎ߩࡔࠞ࠾࠭ࡓࠍࠄ߆ߦߒߡࠆ㧚Fukue ࠄ 14) ߪ㧘ਛߩ㤛㋕㋶ߩṁ⸃ߦ߁㑆㓗ߩჇᄢ߇ߩᓸ ⷞ⊛᭴ㅧࠍᄢ߈ߊᄌ߃㧘ߘࠇ߇᭽ޘߥ⾰․ᕈߦᓇ 㗀ࠍ߷ߔߎߣࠍᜰ៰ߒߡࠆ㧚㊁ࠄ15),16)ߪ㧘㤛 ㋕㋶ࠍߔࠆ☼ᕈࠍⓨ᳇ੇ῎ߐߖߚߣߎࠈ㧘ᣣᢙ ߩ⚻ㆊߦߞߡਛᕈ߆ࠄᒝ㉄ᕈ߳ߣ⒖ⴕߒߚߎߣ㧘 ߘࠇߦߞߡ৻ゲ❗ᒝᐲ߿ࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇ ߇ᄢ߈ߊᄌൻߒߚߎߣࠍㅀߴߡࠆ㧚߹ߚ㧘㊁ࠄ17) ߪ㧘Ⓧ▚᷷ᐲߩᔨࠍዉߔࠆߎߣߦࠃߞߡߩ㉄ ᕈ⒖ⴕㅦᐲߩ⹏ଔᚻᴺࠍឭ᩺ߒߡࠆ㧚 ᧄ⺰ᢥߦ߅ߡߪ㧘㤛㋕㋶ߘߩ߽ߩࠍ⎇ⓥߩኻ⽎ ߦߒߡࠆߩߢߪߥ㧚⍹Ꮉ⋵ౝߦᐢߊಽᏓߔࠆᄢ ᪀ጀߩਛߦታ㓙ߦ㤛㋕㋶߇ᄙߊ߹ࠇߡ߅ࠅ㧘ߘࠇ ߇㉄ൻߒߡ⎫㉄߇↢ᚑߐࠇࠆߎߣߦࠃߞߡ㧘⾰․ ᕈߦᄙᄢߥᓇ㗀ࠍ߷ߔߎߣࠍ⼏⺰ߔࠆ㧚ߒߚ߇ߞ ߡ㧘ᧄ⎇ⓥߢߪ㤛㋕㋶ߩ㉄ൻߦ߁⋚ߩ㉄ᕈൻ߇ ᄌᒻᒝᐲ․ᕈ㧘ࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇ߥߤߩ⾰ ․ᕈߦߤߩࠃ߁ߥᓇ㗀ࠍ߷ߔߩ߆ࠍࠄ߆ߦߔ ࠆߎߣࠍ⋡⊛ߣߒߡࠆ㧚ߎߩὐߦߟߡߪ㧘㊁ ࠄ15),16)ߩ⎇ⓥߣㅢߔࠆ㧚ߒ߆ߒ㧘ᧄ⎇ⓥߢߪ⋚ ౝㇱߦ߅ߡ㉄ᕈൻ߇ㅴⴕߔࠆ႐วߩ⾰․ᕈߩᄌ ൻߦᵈ⋡ߒߡࠆߎߣ߆ࠄ㧘৻ㅪߩቶౝታ㛎ߦߪޟḨ Ả⁁ᘒ㧔⥄ὼ᳓Ყ⁁ᘒ㧕ޠߢ㉄ᕈൻߐߖߚ⹜ᢱࠍ↪ ࠆᔅⷐ߇ࠆ㧚㊁ࠄߪޟⓨ᳇ੇ῎ޠߦࠃߞߡ㉄ ᕈൻߐߖߚ⹜ᢱࠍታ㛎ߦ↪ߡࠆߎߣ߆ࠄ㧘╩⠪ ࠄߩ⎇ⓥߣߪ⌕⋡ὐ߇⇣ߥࠆ㧚ߒߚ߇ߞߡ㧘╩⠪ࠄ ߪ㤛㋕㋶ࠍߔࠆ☼ᕈ⹜ᢱࠍណขߒ㧘ḨẢ⁁ᘒ㧔⥄ ὼ᳓Ყ⁁ᘒ㧕ߢᲑ㓏⊛ߦ㉄ᕈൻߐߖߚᓟ㧘ߎࠇࠄ ߩ⹜ᢱࠍ↪ߡ৻ゲ❗⹜㛎㧘߅ࠃ߮ᶧᕈ႟ᕈ㒢 ⇇⹜㛎ࠍታᣉߒߚ㧚ߎࠇࠄߩታ㛎⚿ᨐ߆ࠄ㧘ㆶర⁁ ᘒ߆ࠄᒝ㉄ᕈߦ⥋ࠆ߹ߢߩㆊ⒟ߦ߅ߡ㧘☼ᕈߩ ৻ゲ❗ᒝᐲ߿ᄌᒻଥᢙ㧘ࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇߇ ࿑ ർਛ᧦☼ᕈ⹜ᢱߩណขὐ ౮⌀ ർਛ᧦☼ᕈౝㇱߦߺࠄࠇࠆ㉄ൻ㋕ ណข⋥ᓟߩർਛ᧦☼ᕈߩ‛ℂൻቇ․ᕈ ⹜ᢱA ⹜ᢱB ᷓߐ㧔m㧕 3.5 ~ 5.0 0.5 ~ 1.5 ᳓⚛ࠗࠝࡦỚᐲᜰᢙ pH 6.1 ~ 6.2 4.7 ~ 5.0 ᳓Ყ w㧔%㧕 55.4 ~ 62.7 37.8 ~ 45.5 ᶧᕈ㒢⇇ wL㧔%㧕 68.2 58.3 ႟ᕈ㒢⇇ wP㧔%㧕 30.3 23.3 ႟ᕈᜰᢙ IP 37.9 35.0 ☸ሶߩኒᐲ ȡs㧔g/cm3㧕 2.670 2.690 ⍾ಽ㧔%㧕 9 31 ࠪ࡞࠻ಽ㧔%㧕 67 61 ☼ಽ㧔%㧕 24 8 ᒝᾲᷫ㊂ Li㧔%㧕 4.6 㧙 ߤߩࠃ߁ߦᄌൻߔࠆߩ߆ࠍࠄ߆ߦߒߚ㧚߹ߚ㧘৻ ゲ❗⹜㛎ߦ↪ߚଏ⹜ߩ㑆㓗᳓ਛߦ߹ࠇࠆฦ ᣣᧄᶏ ጘ㒂 N ㊄ᴛᏒ ᵤᐈ↸ ᣣᧄᶏ ጘ㒂 N ㊄ᴛᏒ ᵤᐈ↸ ᴡർẟ ⹜ᢱណขὐ ᵤᐈ㚞 ർ㒽⥄േゞ ㊄ᴛᧄ㪠㪚 ㊄ᴛ᧲㪠㪚 ㊄ᴛ㚞 ንጊ ⍹Ꮉ ࿖㪏ภ ࿖㪈㪌㪐ภ 䂓 ಾขᴺ㕙 ፣უ႐ 㪡㪩৾የ✢
⒳ࠗࠝࡦỚᐲࠍ᷹ቯߔࠆߎߣߦࠃߞߡ㧘ଏ⹜ਛߩ ᳓ṁᕈᚑಽ㊂ࠍᛠីߒ㧘৻ゲ❗⹜㛎⚿ᨐߣߩ 㑐ㅪᕈߦߟߡ߽⚦ߦ⼏⺰ߒߚ㧚ߐࠄߦ㧘㕖ᵴᕈ ߢ⍮ࠄࠇࠆࠞࠝࡦߦỚᐲߩ⇣ߥࠆ⎫㉄ࠍട߃㧘ห ᭽ߦ৻ゲ❗⹜㛎㧘ᶧᕈ႟ᕈ㒢⇇⹜㛎ࠍታᣉߒ㧘 ⎫㉄ߦࠃࠆ㉄ᕈൻ߇⾰․ᕈߦ߷ߔᓇ㗀ࠍᛠីߒ ߚ㧚 ᦨᓟߦ㧘ታ㓙ߦ፣უߒߚ㉄ᕈ⋚߆ࠄߥࠆಾ ᴺ㕙 3)ߦߟߡቯ⸃ᨆࠍⴕߞߚ㧚ߎߩ⸃ᨆ⚿ᨐ߆ ࠄ㧘⋚߇ਛᕈ߆ࠄᒝ㉄ᕈߦ⥋ࠆ߹ߢߩ㑆ߦᴺ㕙ߩ ቯᕈ߇ߤߩ⒟ᐲᄬࠊࠇࠆߩ߆ߦߟߡᬌ⸛ߒߚ㧚 㧞㧚ታ㛎⹜ᢱ߅ࠃ߮ଏ⹜ߩ᧦ઙ 㧔㧝㧕ታ㛎⹜ᢱ ታ㛎ߦ↪ߚ⹜ᢱߪ㧘⍹Ꮉ⋵ᴡർᵤᐈ↸ർਛ᧦ 㧔⍹ᎹᎿᬺ㜞╬ኾ㐷ቇᩞㄭற㧕ౝߩขࠅ႐ߦߡ ណขߒߚ☼ᕈߢࠆ㧚એᓟ㧘ർਛ᧦☼ᕈߣ߱㧚 ࿑ ߦ⹜ᢱណขὐࠍ␜ߔ㧚ർਛ᧦☼ᕈߪ㧘㊄ᴛ Ꮢ߆ࠄᵤᐈ↸ߦᐢߊಽᏓߔࠆ╙ਃ♿㞲ᣂᓟᦼ㨪╙ ྾♿ᦝᣂೋᦼߦ߆ߌߡၸⓍߒߚᄢ᪀ጀਅㇱߦ⋧ᒰ ߔࠆ 18)㧚ర᧪ർਛ᧦☼ᕈߪ߈ࠇߥᥧἯ⦡ࠍߒߡ ࠆ߇㧘ណขὐߩጀㇱಽࠍࠪࡖࡌ࡞ߥߤߢជߞ ߡߊߣ㧘ᚲޘߦ౮⌀ ߦ␜ߔࠃ߁ߥ⿒ⶊ⦡ߩ㉄ൻ ㋕߇ࠇߚ㧚೨ߩ⺞ᩏߦ߅ߡ㧘㕙߆ࠄ 1m ߩᷓߐߦࠆ⹜ᢱߩpH ߇ 4 ઃㄭࠍ␜ߒߚߎߣ߆ࠄ㧘 ㉄ᕈൻߪ߆ߥࠅᷓㇱߦ߹ߢࠎߢࠆߣᕁࠊࠇࠆ㧚 ╩⠪ࠄߪ㧘หߓ⾰ߢ㉄ᕈൻ߇ㅴⴕߒߡߥᭂജ pH ߩ㜞☼ᕈ⹜ᢱ㧔ਛᕈߦㄭ⹜ᢱ㧕ࠍᓧࠆߚ ߦ㧘ᷓߐ 5m ߹ߢߩ⹜ᢱណข߇น⢻ߥࡂࡦ࠼ࠝࠟ ࠍ↪ߡ㧘pH ࠍ᷹ቯߒߥ߇ࠄជࠅㅴࠎߛ㧚⹜ᢱߩ pH ߪߨᷓᐲᣇะߦኻߒߡჇടะߦࠅ㧘ᷓߐ 3.5m એߦ߅ߡ㧘☼ᕈߩ pH ߇ 6 એߩ୯ࠍ␜ ߒߚߎߣ߆ࠄ㧘ᷓߐ3.5m એߦၸⓍߔࠆർਛ᧦☼ᕈ ߪ㧘߶߷ㆶర⁁ᘒߦㄭߣᕁࠊࠇࠆ㧚 ߦ㧘ណข⋥ᓟߩർਛ᧦☼ᕈߩ‛ℂൻቇ․ ᕈࠍ␜ߔ㧚ߥ߅㧘ਛߩ⹜ᢱA ߪ 3.5㨪5.0m ߩᷓߐ ߆ࠄណขߒߚ⹜ᢱࠍ␜ߒ㧘⹜ᢱ B ߪหߓὐߢ 0.5 㨪1.5m ߩᷓߐ߆ࠄណขߒߚ⹜ᢱࠍ␜ߔ㧚⹜ᢱ A ߣ⹜ ᢱB ߩਔ⠪ߦ⧯ᐓߩ㆑ߪࠆ߽ߩߩ㧘ࠪ࡞࠻ಽ߇ 60%એ߹ࠇߡࠆߎߣ߆ࠄ㧘ർਛ᧦☼ᕈߪࠪ ࡞࠻⾰ߢࠆ㧚ណข⋥ᓟߩ⹜ᢱߩpH ࠍ᷹ቯߒߚ⚿ ᨐ㧘⹜ᢱA ߇ 6.1㨪6.2 ࠍ㧘⹜ᢱ B ߇ 4.7㨪5.0 ࠍ␜ߒ ߚ㧚߹ߚ㧘⹜ᢱណขᤨߦ߅ߡ㧘ਅ᳓߇㕙 ߆ࠄ2.5m ߩᷓߐߦሽߒߚߎߣ߆ࠄ㧘ណข⋥ᓟߩਔ ⠪ߩ᳓Ყߪ⇣ߥࠆ㧚 (a) ⵣߏߒ (b) ࠗࡦࠠࡘࡌ࠲ౝߦߡ⟎ ౮⌀ ḨẢ⁁ᘒߢᲑ㓏⊛ߦ㉄ᕈൻߐߖࠆ᭽ሶ ฦଏ⹜㧔⹜ᢱA ߢ㧕ߩ‛ℂൻቇ․ᕈ ⟎ᣣᢙ (day) pH ㉄ൻㆶర㔚 ORP (mV) ᳓Ყ w (%) ḨẢኒᐲ ȡt (g/cm3) ੇ῎ኒᐲ ȡd (g/cm3) 0 6.1 260 41.0 1.753 1.227 0 6.2 282 43.0 1.758 1.247 1 5.8 276 43.1 1.765 1.234 1 5.8 277 41.8 1.757 1.239 3 5.3 289 42.7 1.759 1.233 3 5.2 285 42.0 1.760 1.240 6 4.7 303 42.9 1.761 1.232 8 4.7 311 42.9 1.764 1.235 8 4.6 313 41.2 1.757 1.244 10 4.5 323 43.4 1.769 1.233 15 4.2 346 41.8 1.778 1.254 15 4.3 347 42.5 1.774 1.245 21 3.9 365 41.8 1.766 1.238 21 4.0 366 42.7 1.777 1.246 28 3.6 394 42.7 1.765 1.237 28 3.7 394 41.3 1.759 1.245 42 2.9 482 41.5 1.771 1.251 44 2.9 495 42.0 1.754 1.235 44 2.9 497 42.5 1.750 1.228 㧔㧞㧕⹜ᢱ⺞ᢛ߅ࠃ߮ଏ⹜ߩ᧦ઙ ౮⌀ ߪ㧘ർਛ᧦☼ᕈࠍḨẢ⁁ᘒߢᲑ㓏⊛ߦ㉄ ᕈ ൻ ߐ ߖ ࠆ ᭽ ሶ ࠍ ␜ ߔ 㧚 ណ ข ߒ ߚ ⹜ ᢱ ߩ ో ㊂ ࠍ 0.85mm ߩ߰ࠆߢⵣߏߒߒߚᓟ㧘ᚲቯߩᄢ߈ߐߩࡃ ࠶࠻ߦࠇ㧘᳓Ყ߇ᄌൻߒߥࠃ߁ߦỨࠇ࠲ࠝ࡞ ߢⷒ㧘ࠗࡦࠠࡘࡌ࠲ౝߢ৻ቯ᷷ᐲ㧔20͠㧕ߩ ߽ߣ㧘ᚲቯߩᦼ㑆⟎ߒߚ㧚ߥ߅㧘ࡃ࠶࠻ߩਛߩ⹜ ᢱߪ㕙߆ࠄ㉄ᕈൻ߇ㅴⴕߔࠆߎߣ߆ࠄ㧘⟎ਛߦ ߅ߡ߽ቯᦼ⊛ߦ⹜ᢱࠍ߆߈ᷙߗ㧘㉄ᕈൻߩਇဋ৻
250 300 350 400 450 500 550 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 pH ORP ( m V) ࿑ޓpHߣORPߩ㑐ଥ ᕈࠍᭂജ㒐ߋࠃ߁ߦߒߚ㧚ᧄ⎇ⓥߢߪ㧘⥄ὼ᳓Ყ ⁁ᘒߢ㉄ᕈൻ߇ㅴⴕߔࠆ႐วࠍᗐቯߒߡࠆߎߣ߆ ࠄ㧘⹜ᢱࠍḨẢ⁁ᘒ㧔⥄ὼ᳓Ყ⁁ᘒ㧕ߢ㧘߆ߟဋ ৻ߦ㉄ᕈൻߐߖࠆᔅⷐ߇ࠆ㧚 ⟎ቢੌᓟ㧘ߎࠇࠄߩ⹜ᢱࠍᔅⷐ㊂ขࠅ㧘ᚲቯߩ ੇ῎ኒᐲߦߥࠆࠃ߁ߦ㕒⊛ߦ✦࿕ߡ㧘⋥ᓘ5cm㧘 㜞ߐ10cm ߩ╴ᒻߩଏ⹜ࠍߒߚ㧚ߥ߅㧘৻ゲ ❗⹜㛎ߦ✦࿕ଏ⹜ࠍ↪ߚℂ↱ߪ㧘☼ᕈߩ ᄌᒻ߿ᒝᐲߦ߷ߔ㉄ᕈൻߩᓇ㗀ࠍ㊀ὐ⊛ߦᛠីߔ ࠆߚߢࠆ㧚ਇᠣੂ⹜ᢱߩ႐ว㧘ߘࠇ߇หߓ⾰㧘 ߆ߟหߓᷓߐ߆ࠄណขߒߚ⹜ᢱߢߞߡ߽ೋᦼߩ᭴ ㅧߩᓇ㗀߿ࡔࡦ࠹࡚ࠪࡦߥߤ㧘ߘߩઁᄙߊߩࡈ ࠔࠢ࠲߇߹ࠇߡࠆߚ㧘⹜㛎⚿ᨐߦᄢ߈ߥ߫ ࠄߟ߈߇↢ߓࠆน⢻ᕈ߇ࠆ㧚 ߦ㧘⹜ᢱA ࠍ↪ߡߒߚ৻ゲ❗⹜㛎↪ ߩଏ⹜ߩ‛ℂൻቇ․ᕈࠍ␜ߔ㧚ߎߎߢ⟎ᣣᢙ 0 ᣣߣߪ㧘ⵣߏߒᓟ⟎ߖߕߦ✦࿕ߡߒߚ ଏ⹜ߩߎߣߢࠆ㧚ߒߚଏ⹜ߩ᳓Ყ߇ណ ข⋥ᓟߩ⹜ᢱߩ᳓Ყ㧔㧕ࠃࠅ߽ૐߊߥߞߡ ࠆ߇㧘ߎࠇߪ⹜ᢱࠍⵣߏߒߔࠆㆊ⒟߿㧘✦࿕ᤨ ߩṳ᳓ߢ᳓ಽ߇ᄬࠊࠇߚߎߣߦࠃࠆ߽ߩߢࠆ㧚 ࠃࠅ㧘ߒߚଏ⹜ߩ᳓Ყߪ㧘߶߷৻ቯߦ ߚࠇߡࠆߎߣ߇ࠊ߆ࠆ㧚ੇ῎ኒᐲߪߔߴߡߦ߅ ߡ㧘1.227㨪1.254g/cm3ߩ▸࿐ߦࠆ㧚߹ߚ㧘ห᭽ߩ ᣇᴺߢ⹜ᢱB ࠍ↪ߡߒߚ৻ゲ❗⹜㛎↪ߩଏ ⹜ߩੇ῎ኒᐲߪ1.320㨪1.340 g/cm3ߩ▸࿐ߦࠆ㧚 ᧄ⎇ⓥߢߪ㧘㉄ᕈൻߩᜰᮡߣߒߡpH ࠍ↪ߡࠆ㧚 ࠍኻ⽎ߣߔࠆ႐ว㧘චಽߦ᳓ಽࠍࠎߢࠆࠃ߁ ߥ⹜ᢱࠍ㒰ߡ㧘ߘߩ߹߹ߩ⁁ᘒߢpH ࠍ᷹ቯߔࠆߎ ߣߪ࿎㔍ߢࠆ㧚ߘߎߢ㧘ᧄ⎇ⓥߢߪ⋚Ꮏቇળၮ Ḱ㧔JGS 0211-2000㧕19)ߦᓥ㧘⹜ᢱߩੇ῎⾰㊂ߦኻ ߔࠆ⫳⇐᳓㧔⹜ᢱਛߩ᳓ࠍ㧕ߩ⾰㊂Ყ߇ 5 ߦߥ ࠆࠃ߁ߦ᳓ࠍട߃ߚޟ ỘᶧߩpHޠࠍଢቱޟ ߩpHޠߣߺߥߒߚ㧚 (a) pH 6.1 (b) pH 4.7 (c) pH 2.9 0.01mm 0.01mm 0.01mm ౮⌀ ർਛ᧦☼ᕈ㧔⹜ᢱA㧕ߩ㔚ሶ㗼ᓸ㏜౮⌀ ߹ߚ৻ᣇߢ㧘pH ࠍ᷹ቯߒߚᓟ㧘หߓ Ộᶧࠍ↪ ߡ㉄ൻㆶర㔚ORP㧔Oxidation- Reduction Potential㧕 ߦߟߡ߽᷹ቯߒߡࠆ㧚 ߩฦଏ⹜ߩ pH ߣ ORP ߩ㑐ଥࠍ࿑ ߦ␜ߔ㧚࿑ߩ pH ߣ ORP ߩ㑐ଥ߆ ࠄ㧘pH ߩૐਅߦኻᔕߒߡ ORP ߇ߒߡࠆߎߣ ߇ࠊ߆ࠆ㧚ߥ߅㧘ർਛ᧦☼ᕈߩ pH ߪ㧘⟎ᣣᢙ 42 ᣣએ㒠㧘ᣣ⚻ߞߡ߽ 2.9 ࠃࠅਅ߇ࠆߎߣߪߥ߆ ߞߚ㧚 㧔㧟㧕ଏ⹜ਛߩ㤛㋕㋶ߩᄌൻ ㉄ᕈൻߔࠆㆊ⒟ߢਛߩ㤛㋕㋶ߪߤߩࠃ߁ߦᄌൻ ߔࠆߩߢࠈ߁߆㧫 ߎߩߎߣࠍ⏕߆ࠆߚߦ㧘 ৻ゲ❗⹜㛎ᓟߩଏ⹜㧔⹜ᢱA ߢ㧕ࠍᩏဳ 㔚ሶ㗼ᓸ㏜㧔SEM㧕ߢⷰኤߒߚ㧚౮⌀ ߦߘࠇߙࠇ pH ߩ⇣ߥࠆଏ⹜ߩ㔚ሶ㗼ᓸ㏜౮⌀ࠍ␜ߔ㧚ߥ߅㧘 ╩⠪ࠄߪ㧝ߟߩଏ⹜ߦኻߒߡ㧡ࠞᚲએߩ႐ᚲߢ ⷰኤࠍⴕ㧘ଏ⹜ਛߩ㤛㋕㋶ߩᒻ⁁ࠍ⏕ߒߡ
࿑ޓർਛ᧦☼ᕈߩ৻ゲ❗⹜㛎⚿ᨐ 0 10 20 30 40 50 60 70 80 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 pH (a) qu䋭pH㑐ଥ qu (k Pa ) ⹜ᢱ㪘䋨ȡd=1.23~1.25g/cm3䋩 ⹜ᢱ㪙䋨ȡd=1.32~1.34g/cm3䋩 0 1 2 3 4 5 6 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 pH (b) E50䋭pH㑐ଥ E50 (MP a) ⹜ᢱ㪘䋨ȡd=1.23~1.25g/cm3䋩 ⹜ᢱ㪙䋨ȡd=1.32~1.34g/cm3䋩 0 2 4 6 8 10 12 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 pH (c) İ㪽䋭pH㑐ଥ İ䌦 (%) ⹜ᢱ㪘䋨ȡd=1.23~1.25g/cm3䋩 ⹜ᢱ㪙䋨ȡd=1.32~1.34g/cm3䋩 0 1 2 3 4 5 6 0 10 20 30 40 50 60 70 80 qu (kPa) (d) E50䋭qu㑐ଥ E50 (MP a) ⹜ᢱ㪘䋨ȡd=1.23~1.25g/cm3䋩 ⹜ᢱ㪙䋨ȡd=1.32~1.34g/cm3䋩 ࠆ㧚౮⌀(a)㨪(c)ߪߘࠇࠄߩਛ߆ࠄㆬࠎߛઍ⊛ߥ ߽ߩߢࠆ㧚 ౮⌀ࠃࠅ㧘pH 6.1 ߩଏ⹜ߦߪᓸዊߥ⚿᥏߇㓸߹ ߞߚ0.01mm ߶ߤߩᄢ߈ߐߩᧁ⧽⁁ߩ㤛㋕㋶㧔⍫ශ㧕 ߇ᄙߊߺࠄࠇࠆ߇㧘pH 4.7 ߩଏ⹜ߢߪߘߩඨಽએ ਅ㧔0.002㨪0.004mm㧕ߩᄢ߈ߐߩ߽ߩߒ߆ߺࠄࠇߥ 㧚ߐࠄߦ㧘pH 2.9 ߦߥࠆߣ㧘ᧁ⧽⁁ߩ㤛㋕㋶ߪ߶ ߣࠎߤߺࠄࠇߕ㧘߆ߦᓸዊߥ⚿᥏߇ᢔࠄ߫ߞߡ ࠆߩߺߢࠆ㧚ߎߩߎߣ߆ࠄ㧘⹜ᢱࠍḨẢ⁁ᘒߢ ⟎ߔࠆߎߣߦࠃߞߡ㧘㤛㋕㋶ߪ㉄⚛ߣᔕߒ㧘⎫㉄ ߇↢ᚑߐࠇ㧘ᓢޘߦߘߩᒻᘒ߇ᄬࠊࠇߡߊ߽ߩߣ ᕁࠊࠇࠆ㧚 㧟㧚ർਛ᧦☼ᕈߩታ㛎⚿ᨐ߅ࠃ߮⠨ኤ 㧔㧝㧕ᄌᒻᒝᐲ․ᕈ ⥄ὼ᳓Ყ⁁ᘒߢ㉄ᕈൻ߇ㅴⴕߔࠆ႐วߩ☼ᕈ ߩᄌᒻᒝᐲ․ᕈࠍᛠីߔࠆߚߦ㧘㧞㧚㧔㧞㧕ߢㅀ ߴߚᣇᴺߢߒߚߘࠇߙࠇߩଏ⹜ࠍ↪ߡ㧘߭ ߕߺㅦᐲ1.0%/min ߩ᧦ઙਅߢ৻ゲ❗⹜㛎ࠍታᣉߒ ߚ㧚࿑ ߦ㧘⹜ᢱA ߅ࠃ߮⹜ᢱ B ߢߒߚଏ⹜ ߩ৻ゲ❗⹜㛎⚿ᨐࠍ␜ߔ㧚(a)ߦ৻ゲ❗ᒝᐲ quߣ pH ߩ㑐ଥ㧘(b)ߦᄌᒻଥᢙ E50ߣpH ߩ㑐ଥ㧘(c)ߦ⎕ უ߭ߕߺ İfߣpH ߩ㑐ଥ㧘(d)ߦ E50ߣquߩ㑐ଥࠍ␜ ߔ㧚ߥ߅㧘ੇ῎ኒᐲߩ㆑ߦࠃࠅ㧘ߘࠇߙࠇߩᄌᒻ ᒝᐲ․ᕈߪ⧯ᐓ߫ࠄߟߡࠆ㧚 ⹜ᢱA ߢߒߚଏ⹜ߩ৻ゲ❗⹜㛎⚿ᨐࠃࠅ㧘 ৻ゲ❗ᒝᐲquߪpH 6 એߩߣ߈ 62㨪70kPa ߩ୯ࠍ ␜ߒ㧘ߘߩᓟ㉄ᕈൻߩㅴⴕ㧔pH ߩૐਅ㧕ߣߣ߽ߦ㧘 ᓢޘߦૐਅߒߡࠆ㧚߹ߚ㧘pH 3 એਅߩ qu߇40㨪 53kPa ߩ୯ࠍ␜ߒߡࠆߎߣ߆ࠄ㧘☼ᕈߩᒝᐲߪ ㉄ᕈൻ߇ㅴⴕߔࠆߎߣߦࠃߞߡᒰೋߩ 2/3 ⒟ᐲߦ߹ ߢૐਅߔࠆ㧚ᄌᒻଥᢙE50ߦߟߡ߽ห᭽ߦ㧘㉄ᕈൻ ߣߣ߽ߦૐਅߒߡࠆ㧚ߚߛߒ㧘pH 4 ઃㄭࠍਅ࿁ࠆ ߣ㧘ૐਅߩᐲว߇ᐞಽ✭߿߆ߦߥߞߡࠆ㧚⎕უ߭
ߕߺ İfߦߟߡߪ㧘㉄ᕈൻߣߣ߽ߦߒ㧘ߘߩᓟ ㉄ᕈൻ߇ߐࠄߦㅴⴕߒ㧘pH 4 ઃㄭࠍਅ࿁ࠆߣߘࠇ߹ ߢߩะ߆ࠄૐਅߦォߓߡࠆ㧚 ⹜ᢱB ߢߒߚଏ⹜ߩ৻ゲ❗⹜㛎⚿ᨐߦߟ ߡߪ㧘⹜ᢱA ߢߒߚଏ⹜ߩ⹜㛎⚿ᨐߣߨ ะ߇৻⥌ߒߡࠆ㧚ߒ߆ߒ㧘࿑(d)ߩ E50㧙qu㑐ଥ ࠃࠅ㧘⹜ᢱA ߣ⹜ᢱ B ߩਔ⠪ࠍᲧセߔࠆߣ㧘ᄌᒻ ᒝᐲ․ᕈߩኻᔕᕈ߇ߣࠇߡߥߎߣ߇ࠊ߆ࠆ㧚 ߃߫㧘⹜ᢱB ߩ qu߇⹜ᢱA ߩ quࠃࠅ߽ᄢ߈ߦ߽ 㑐ࠊࠄߕ㧘E50ߪ⹜ᢱA ߩᣇ߇ᄢ߈ߥ୯ࠍ␜ߒߡࠆ㧚 ߎࠇߪ ߦ߽␜ߒߚࠃ߁ߦ㧘⹜ᢱA ߣ⹜ᢱ B ߪห ߓὐߢណขߒߡࠆ߽ߩߩ㧘ᷓߐߦࠃߞߡ☸ᐲ߿ ࠦࡦࠪࠬ࠹ࡦࠪߥߤߩ‛ℂ․ᕈ߇⇣ߥߞߡࠆߚ ߣᕁࠊࠇࠆ㧚 એߩߎߣ߆ࠄ㧘ർਛ᧦☼ᕈߪ㉄ᕈൻߣߣ߽ߦ ᒝᐲ߇ૐਅߔࠆߎߣ߇ࠄ߆ߦߥߞߚ㧚߹ߚ㧘ᄌᒻ ․ᕈߦߟߡߪ㧘pH 4 ઃㄭߩߣߎࠈߢ E50ߣİfߩ ะ߇ᄌࠊߞߡࠆ㧚ታ㓙ߩ㉄ᕈ⋚ߦ߅ߡ㧘E50 ࠍᒢᕈଥᢙߣߒߡ⇛ߩᄌᒻ⸃ᨆࠍⴕ߁㓙ߪ㧘ߎߩ ὐߦᵈᗧߔࠆᔅⷐ߇ࠆ㧚 ⸥ߢᓧࠄࠇߚ৻ゲ❗⹜㛎⚿ᨐࠍࠃࠅ⚦ߦᬌ ⸛ߔࠆߚߦ㧘㉄ᕈൻߦ߁ࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇ ߩᄌൻ㧘߅ࠃ߮ଏ⹜ਛߩ᳓ṁᕈᚑಽ㊂ߩᄌൻ ࠍ⺞ߴߚ㧚 㧔㧞㧕ࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇ߩᄌൻ ☼ᕈߩ㉄ᕈൻㆊ⒟ߦ߅ߌࠆࠦࡦࠪࠬ࠹ࡦࠪ㒢 ⇇ߩᄌൻࠍ⺞ߴࠆߚߦ㧘৻ゲ❗⹜㛎ߦ↪ߚ⹜ ᢱA ࠍㅜ↪ᗧߒߡ㧘pH ࠍ᷹ቯߒߚᓟ㧘ᶧᕈ႟ᕈ 㒢⇇⹜㛎ࠍታᣉߒߚ㧚 ࿑ ߦpH ߣࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇ߩ㑐ଥࠍ␜ߔ㧚 ߥ߅㧘࿑ਛߩpH ߪᶧᕈ㒢⇇ wL㧘႟ᕈ㒢⇇wPߦ⋧ᒰ ߔࠆ᳓ᲧߩpH ߣߪ⇣ߥࠅ㧘⹜㛎㐿ᆎ೨ߩ⟎⹜ᢱ ߩpH ߢࠆ㧚⹜㛎⚳ੌᓟߩ⹜ᢱߩ pH ߣᲧセߒߚ⚿ ᨐ㧘ߘߩᏅߪ0.2 એਅߢߞߚ㧚 ࿑ࠃࠅ㧘㉄ᕈൻߣߣ߽ߦwLߣ wPߩਔ⠪ߪߣ߽ߦ ૐਅߒ㧘႟ᕈᜰᢙIP߽߿߿ૐਅะߦࠆߩ߇ࠊ߆ ࠆ㧚߹ߚ㧘wLߣIPߩ㑐ଥࠍ႟ᕈ࿑㧔࿑㧕ߦࡊࡠ࠶ ࠻ߒߚߣߎࠈ㧘ਛᕈ㧔pH 6.1㧕߆ࠄᒝ㉄ᕈ㧔pH 2.9㧕 ߔ ߴ ߡ ߦ ߅ ߡ ർ ਛ ᧦ ☼ ᕈ ߪ 㜞 ᶧ ᕈ 㒢 ⇇ ☼ 㧔CH㧕ߦಽ㘃ߐࠇࠆ߇㧘㉄ᕈൻ߇ㅴⴕߔࠆߦߟࠇ㧘 ૐᶧᕈ㒢⇇☼㧔CL㧕߳ߣㄭߠߡߊ㧚ߟ߹ࠅ㧘 ❗ᕈߣ႟ᕈ߇ዊߐ߳ߣᄌൻߒߡߊ㧚 pH ߣ wL㧘wPߩ㑐ଥ߆ࠄᓧߚㄭૃᑼࠍ↪ߡ㧘৻ ゲ❗⹜㛎ߦ↪ߚฦଏ⹜ߩ᳓Ყw㧔 ߦ␜ ߒߚ⹜ᢱA ߩ᳓Ყ㧕߆ࠄࠦࡦࠪࠬ࠹ࡦࠪᜰᢙ IC 㧔= (wL㧙w)/IP㧕ࠍ⸘▚ߒ㧘߹ߣߚ߽ߩ߇࿑ ߢ ࠆ㧚ࠦࡦࠪࠬ࠹ࡦࠪᜰᢙICߪ㧘⚦☸ߩ⥄ὼ᳓ 20 30 40 50 60 70 80 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 pH wL (%), w P (%), I P w L IP wP ࿑ޓpHߣࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇ߩ㑐ଥ 0 10 20 30 40 50 60 0 10 20 30 40 50 60 70 80 90 100 wL䇭(%) IP 6㻡pH 5㻡pH䋼6 4㻡pH䋼5 3㻡pH䋼4 pH䋼3 IP=0.73(wL-20) wL=50 (CL) (CH) (ML) (MH) ࿑ޓ႟ᕈ࿑ 0.0 0.2 0.4 0.6 0.8 1.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 pH IC ࿑ޓpHߣࠦࡦࠪࠬ࠹ࡦࠪᜰᢙߩ㑐ଥ Ყ⁁ᘒߦ߅ߌࠆ⋧ኻ⊛ߥ⎬ߐࠍߔ⋡ߢࠆ㧚ߒ ߚ߇ߞߡ㧘IC߇ 0 ߦㄭ߶ߤ⥄ὼ᳓Ყߪᶧᕈ㒢⇇ ߦㄭߊ㧘ߪエࠄ߆⁁ᘒߦࠆߎߣࠍ␜ߒߡࠆ㧚 ࿑ ࠃࠅ㧘pH ߩૐਅߣߣ߽ߦ ICߪૐਅߒߡࠆ㧚IC ߇0 ߦㄭߠߊ߶ߤߪਇቯߦߥࠆߩߢ㧘㉄ᕈൻߦ ߁ICߩૐਅ߇৻ゲ❗ᒝᐲࠍૐਅߐߖࠆⷐ࿃ߦߥ ߞߡࠆ㧚
㧔㧟㧕ଏ⹜ਛߩ᳓ṁᕈᚑಽ㊂ ߩ㑆㓗᳓ਛߦṁ⸃ߒߡࠆਥⷐߥᚑಽߣߒߡ㧘 ࠽࠻࠙ࡓ㧘ࠞ࠙ࡓ㧘ࠞ࡞ࠪ࠙ࡓ㧘ࡑࠣࡀࠪ࠙ࡓ ߩฦ⒳㊄ዻࠗࠝࡦ㧔Na+㧘K+㧘Ca2+㧘Mg2+㧕㧘߅ࠃ߮ Ⴎൻ‛ࠗࠝࡦ㧔Cl-㧕ߣ⎫㉄ࠗࠝࡦ㧔SO 42-㧕ߩ6 ᚑಽ ߇ࠆ 20)㧚ߎࠇࠄߩ᳓ṁᕈᚑಽ߇ਛߦߤߩ⒟ᐲ ߹ࠇߡࠆ߆ߦࠃߞߡߩ‛ℂജቇ․ᕈߦ߷ߔ ᓇ㗀߇⇣ߥࠆߎߣ߇⍮ࠄࠇߡࠆ㧚ᧄ⎇ⓥߦ߅ߡ ߪ㧘৻ゲ❗⹜㛎ᓟߩଏ⹜㧔⹜ᢱA ࠍ↪㧕߆ࠄ ᳓ṁᕈᚑಽ⹜㛎↪ߩ⹜ᢱࠍಽขߒ㧘㑆㓗᳓ਛߦ ߹ࠇࠆฦ⒳ࠗࠝࡦỚᐲࠍ᷹ቯߒߚ㧚⹜㛎ᣇᴺߪ⋚ ᎿቇળၮḰ㧔JGS 0241-2000㧕20)ࠍណ↪ߒߚ㧚ߎࠇࠄ ߩ⹜㛎⚿ᨐ߆ࠄ㧘Ბ㓏⊛ߦ㉄ᕈൻߐߖߚർਛ᧦☼ᕈ ⹜ᢱߩฦ⒳᳓ṁᕈᚑಽ㊂㧔mg/g㧕ࠍᛠីߒߚ㧚 ᧄ⎇ⓥߢߪ⋚ᎿቇળၮḰߦᓥ㧘ਛߩฦ⒳᳓ṁ ᕈᚑಽ㊂ࠍߘࠇߙࠇ᳓ṁᕈࠞ࡞ࠪ࠙ࡓࡑࠣࡀ ࠪ࠙ࡓ࠽࠻࠙ࡓࠞ࠙ࡓ㊂㧘Ⴎൻ‛ ㊂㧘߅ࠃ߮⎫㉄Ⴎ㊂ߣ߱㧚࿑ ߦ pH ߣฦ⒳ ᳓ṁᕈᚑಽ㊂ߩ㑐ଥࠍ␜ߔ㧚❑ゲߩᏀߦ⎫㉄ Ⴎ㊂㧔SSO4㧕ࠍ␜ߒ㧘ฝߦ᳓ṁᕈࠞ࡞ࠪ࠙ࡓ ࡑࠣࡀࠪ࠙ࡓ࠽࠻࠙ࡓࠞ࠙ࡓ㊂㧔SCa㧘 SMg㧘SNa㧘SK㧕ࠍ␜ߔ㧚ߥ߅㧘Ⴎൻ‛ࠗࠝࡦỚᐲߦ ߟߡߪ᷹ቯߒߡߥ㧚࿑ࠃࠅ㧘㉄ᕈൻߦࠃߞߡ pH ߇ૐਅߔࠆߣߣ߽ߦ㧘᳓ṁᕈࠞ࡞ࠪ࠙ࡓࡑࠣࡀ ࠪ࠙ࡓ㧘߅ࠃ߮⎫㉄Ⴎ߇Ⴧടߒߡࠆߎߣ߇ࠊ߆ࠆ㧚 ․ߦpH 4 એਅߦ߅ߌࠆ⎫㉄ႮߩჇട߇⪺ߒ㧚᳓ṁ ᕈ࠽࠻࠙ࡓࠞ࠙ࡓߦߟߡߪᓸ㊂ߢ㧘ߒ߆߽ ߶ߣࠎߤᄌൻ߇ߥ㧚 pH 4 ࠍਅ࿁ߞߡ߆ࠄߩ⎫㉄ႮߩᕆỗߥჇടߪ㧘ᒝ ᾲᷫ㊂⹜㛎ߩ⚿ᨐߣ߽㘃ૃߒߡࠆ㧚ᒝᾲᷫ㊂ߪ㧘 (1)ᯏ‛ߩ㉄ൻΆ㧘(2)Ἱੇ῎ߢㅺᢔߒߥ⚿ว᳓ ߿⚿᥏᳓ߩㅺᢔ㧘(3)㉄Ⴎ㘃߿⎫㉄Ⴎ㘃ߩಽ⸃ߥߤ ߦࠃࠆ߽ߩߣߐࠇߡࠆ㧚࿑ ߦ pH ߣᒝᾲᷫ㊂ߩ 㑐ଥࠍ␜ߔ㧚࿑ࠃࠅ㧘⎫㉄Ⴎ㊂ߣห᭽ߦpH 4 એ ਅߩᒝᾲᷫ㊂LiߩჇട߇⪺ߒ㧚ߘߎߢ㧘࿑ ࠍ↪ ߡർਛ᧦☼ᕈ 1g ߦኻߔࠆᒝᾲߦࠃࠆ៊ᄬ⾰㊂ ࠍ▚ቯߔࠆߣ㧘pH 3.9 ߢߪ 47mg㧘pH 3 ߢߪ 62mg ߣ pH 3.9 ߆ࠄ 3 ߹ߢߩ㑆ߦ 15mg ߶ߤჇടߒߡࠆ㧚 ࿑ ࠃࠅ㧘⎫㉄Ⴎ㊂㧔SSO4㧕߇pH 3.9 ߆ࠄ 3 ߹ ߢߩ㑆ߦ 11mg/g ߶ߤჇടߒߡࠆߎߣࠍ⠨ᘦߔࠆ ߣ㧘pH 4 ࠍਅ࿁ߞߡ߆ࠄߩᒝᾲߦࠃࠆ⾰㊂ߩ៊ᄬߪ㧘 ⎫㉄Ⴎߩಽ⸃߇ᄢ߈ߊ㑐ਈߒߡࠆ߽ߩߣᕁࠊࠇࠆ㧚 ߹ߚ৻ᣇߢ㧘pH 4 ઃㄭߢߩะߩᄌൻߪ㧘৻ゲ ❗⹜㛎⚿ᨐ߆ࠄᓧߚᄌᒻଥᢙ E50ߣ⎕უ߭ߕߺ İfߩ ะߩᄌൻߣ߽৻⥌ߔࠆ㧚 0 2 4 6 8 10 12 14 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 pH S SO 4 (mg /g ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 S Ca , S Mg , S Na , S K ( m g/ g) ࿑ޓpHߣฦ⒳᳓ṁᕈᚑಽ㊂ߩ㑐ଥ SSO4 SCa SMg SNa SK 3 4 5 6 7 8 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 pH Li (%) ࿑ޓpHߣᒝᾲᷫ㊂ߩ㑐ଥ 㧠㧚⎫㉄ߦࠃࠆ㉄ᕈൻ߇☼ᕈߩ⾰․ᕈߦ ߷ߔᓇ㗀 ർਛ᧦☼ᕈ߇㉄ᕈൻߒߡߊㆊ⒟ߢߪ㧘㉄ൻ㋕ 㧔Fe2O3㧕߿᳓㉄ൻ㋕㧔FeOOH㧕ߥߤ㧘⎫㉄એᄖߩൻ ቇ‛⾰߽↢ᚑߐࠇࠆ㧚ߒߚ߇ߞߡ㧘☼ᕈߩ⾰․ ᕈߦ߷ߔ⎫㉄ߩߺߩᓇ㗀ࠍᛠីߔࠆᔅⷐ߇ࠆ㧚 ߘߎߢ╩⠪ࠄߪ㧘ࠞࠝࡦߣ⎫㉄ߩᷙวࠍߒ㧘 ৻ゲ❗⹜㛎ߣᶧᕈ႟ᕈ㒢⇇⹜㛎ࠍታᣉߒߚ㧚ታ 㛎ߦࠞࠝࡦࠍ↪ࠆℂ↱ߪ㧘ࠞࠝࡦߪ㕖ᵴᕈߢ ࿖ౝ࿖ᄖߦ߅ߡᄙߊߩታ❣ࠍᱷߒߡࠆߚ㧘 ⎇ⓥ⠪ߩ㑆ߢߪߘߩ․ᕈ߇ᐢߊ⍮ࠄࠇߡࠆ߆ࠄߢ ࠆ㧚వߕ㧘ࠞࠝࡦ㧔Ꮢ⽼ߩࡄ࠙࠳⁁ߩ߽ߩ㧕 ࠍ㧟ߟߩࡃ࠶࠻ߦಽߌ㧘⫳⇐᳓߅ࠃ߮Ớᐲࠍᄌ߃ߚ 㧞⒳㘃ߩ⎫㉄᳓ṁᶧ㧔ࡕ࡞Ớᐲ㧦0.05mol/l㧘0.5mol/l㧕 ࠍߘࠇߙࠇߩࡃ࠶࠻ߦ᳓Ყ߇หߓߦߥࠆࠃ߁ߦട ߃ߡ⦟ߊᷙߗวࠊߖᓟ㧘ḨẢ⁁ᘒߢ㧝ㅳ㑆㙃↢ߐߖ ߚ㧚ߘߒߡ㧘ർਛ᧦☼ᕈߩ႐วߣห᭽ߦ㧘ᚲቯߩ
࿑㪄㪐ޓࠞࠝࡦߩ৻ゲ❗⹜㛎⚿ᨐ 0 50 100 150 200 1.5 2.0 2.5 3.0 3.5 4.0 4.5 pH (a) qu䋭pH㑐ଥ qu (k Pa ) ⫳⇐᳓ 0.05mol/l 0.5mol/l 0 5 10 15 1.5 2.0 2.5 3.0 3.5 4.0 4.5 pH (c) İf䋭pH㑐ଥ İf (%) ⫳⇐᳓ 0.05mol/l 0.5mol/l 0 2 4 6 8 10 1.5 2.0 2.5 3.0 3.5 4.0 4.5 pH (b) E50䋭pH㑐ଥ E50 (MP a) ⫳⇐᳓ 0.05mol/l 0.5mol/l 0 2 4 6 8 10 0 50 100 150 200 qu (kPa) (d) E50䋭qu㑐ଥ E50 (MP a) ⫳⇐᳓ 0.05mol/l 0.5mol/l ੇ῎ኒᐲߦߥࠆࠃ߁ߦ㕒⊛ߦ✦࿕ߡ⋥ᓘ 5cm㧘 㜞ߐ10cm ߩ╴ᒻߩଏ⹜ࠍߒ㧘৻ゲ❗⹜㛎 ࠍታᣉߒߚ㧚ߥ߅㧘ᧄታ㛎ߢ↪ߚࠞࠝࡦߩpH ࠍ ೨ߦ᷹ቯߒߚߣߎࠈ㧘4.3 ࠍ␜ߒߚ㧚 ࠞࠝࡦߩ৻ゲ❗⹜㛎⚿ᨐࠍ࿑ ߦ␜ߔ㧚ଏ⹜ ߩੇ῎ኒᐲߪ㧘⫳⇐᳓ࠍട߃ߡߒߚpH 4 એ ߩଏ⹜㧘߅ࠃ߮ࡕ࡞Ớᐲ0.05mol/l ߩ⎫㉄᳓ṁᶧࠍ ട߃ߡߒߚpH 3 ઃㄭߩଏ⹜ߦߟߡߪ㧘1.220 㨪1.250 g/cm3ߩ▸࿐ߦࠆ㧚ࡕ࡞Ớᐲ0.5mol/l ߩ⎫ ㉄᳓ṁᶧࠍട߃ߡߒߚpH 1.6 એਅߩଏ⹜ߦߟ ߡߪ㧘ଏ⹜߇㕖Ᏹߦエᒙߢ⥄┙ߐߖࠆߎߣ߇࿎ 㔍ߢߞߚߚ㧘⧯ᐓኒߦ✦࿕㧘ੇ῎ኒᐲߪ 1.290㨪1.320 g/cm3ߩ▸࿐ߦࠆ㧚ߥ߅㧘pH ߇ 1.6 ߹ ߢૐ⋚ߪታ㓙ߦߪሽߒߥߩ߆߽ߒࠇߥ㧚 ⋚ਛߩ㤛㋕㋶ߩ㊂ߩᄙዋߦࠃߞߡ⇣ߥࠆ߇㧘 pH 2.5 ࠍਅ࿁ࠆ⋚ߪ⏕ߐࠇߡࠆ㧚࿑ࠃࠅ㧘ࠞ ࠝࡦߩ⎫㉄Ớᐲ߇㜞ߊߥࠆߦߒߚ߇ߞߡ㧘ߟ߹ࠅ pH ߇ૐਅߔࠆߦߒߚ߇ߞߡ quߪ⪺ߒߊૐਅߒߡ ࠆ㧚ࠞࠝࡦߪpH 4 એߢߪ 175㨪194kPa ߶ߤߩᒝ ᐲࠍߒߡࠆ߇㧘pH 1.6 એਅߦߥࠆߣ 16㨪20kPa ߣ㧘1/10 ⒟ᐲߦ߹ߢૐਅߒߡࠆ㧚߽ߒ㧘ਔ⠪ߩੇ ῎ኒᐲ߇หߓߢࠇ߫㧘ߐࠄߦ⪺ߒૐਅࠍ␜ߒߚ ߢࠈ߁㧚ߎߩߎߣߪ㧘ർਛ᧦☼ᕈߩpH ߇ 6.2 ߆ 20 30 40 50 60 70 80 1.5 2.0 2.5 3.0 3.5 4.0 4.5 pH wL (%), w P (%), I P ࿑ޓpHߣࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇ߩ㑐ଥ wL IP wP ࠄ2.9 ߹ߢૐਅߔࠆ㑆ߦᒝᐲ߇ 2/3 ⒟ᐲߦ߹ߢૐਅߔ ࠆߩߣᲧセߔࠆߣ㧘ᒝᐲߦ߷ߔ⎫㉄ߩߺߩᓇ㗀ߪ 㕖Ᏹߦᄢ߈ߣᕁࠊࠇࠆ㧚߹ߚ㧘ᄌᒻଥᢙE50ߦߟ ߡ߽ห᭽ߦ㧘ࠞࠝࡦߩ⎫㉄Ớᐲ߇㜞ߊߥࠆߦߒߚ ߇ߞߡ㧘E50߽⪺ߒߊૐਅߒߡࠆ㧚ߒ߆ߒ㧘ർਛ᧦ ☼ᕈߣߪ⇣ߥࠅ㧘ૐਅߩะ߇⋥✢⊛ߢߞߚ㧚 ⎕უ߭ߕߺİfߦߟߡߪ㧘pH 4 એߣ pH 3 ઃㄭߩ㑆 ߦ⍎ߥ㆑ߪߺࠄࠇߥ߇㧘pH 1.6 એਅߦߥࠆߣ㧘
0 5 10 15 20 0.0 0.2 0.4 0.6 0.8 tanĭ c ( kP a) Fs=0.98 Fs=1.20 c=8.04kPa ĭ=12.5° c=11.01kPa ĭ=12.5° ࿑㪄㪈㪉䇭ㅒ▚ᴺ䈮䉋䉎ᒝᐲቯᢙ䈱⸳ቯ ᭂ┵ߦᄢ߈ߊߥߞߡࠆ㧚E50㧙qu㑐ଥߦߟߡߪ㧘 ᄌᒻᒝᐲ․ᕈߩኻᔕᕈ߇߈ߜࠎߣขࠇߡࠆߎߣ ߇ࠊ߆ࠆ㧚ߎࠇࠄߪർਛ᧦☼ᕈߩࠃ߁ߥะߣߪ ⇣ߥࠆ㧚 ߹ߚ৻ᣇߢ㧘৻ゲ❗⹜㛎ߣਗⴕߒߡᶧᕈ႟ᕈ 㒢⇇⹜㛎߽ⴕߞߚ㧚࿑ ߦ㧘ᶧᕈ㒢⇇wL㧘႟ᕈ㒢 ⇇ wP㧘႟ᕈᜰᢙ IPߣ pH ߣߩ㑐ଥࠍ␜ߔ㧚ߥ߅㧘 0.5mol/l ⎫㉄᳓ṁᶧࠍട߃ߚࠞࠝࡦߩ႟ᕈ㒢⇇⹜ 㛎ߪታᣉߒߡߥ㧚࿑ࠃࠅ㧘wLߪർਛ᧦☼ᕈߣ ห᭽ߦ㧘pH ߩૐਅ㧔⎫㉄Ớᐲߩ㧕ߦߞߡૐਅ ߒߡࠆ㧚ߎߩૐਅߩะߪർਛ᧦☼ᕈࠃࠅ߽㗼 ⪺ߢࠆ㧚߹ߚ㧘wP߽ wLࠃࠅߪᐞಽ✭߿߆ߢߪ ࠆ߇ૐਅߒߡ߅ࠅ IP߽ߘࠇߦኻᔕߒߡૐਅߒߡࠆ㧚 એߩߎߣ߆ࠄ㧘⎫㉄ߦࠃࠆ㉄ᕈൻ߇☼ᕈߩᄌ ᒻᒝᐲ․ᕈ㧘߅ࠃ߮ࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇ߦ߷ ߔᓇ㗀ࠍᛠីߔࠆߎߣ߇ߢ߈ߚ㧚⋚ਛߩ⎫㉄ߩ↢ ᚑߪ㧘ߩᒝᐲߣᄌᒻଥᢙ㧔ᒢᕈଥᢙ㧕ࠍ⪺ߒߊૐ ਅߐߖࠆߎߣ߇ࠄ߆ߦߥߞߚ㧚ߎࠇߪ㉄ᕈൻߦ ߁ࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇ߩᄌൻ߆ࠄ߽ℂ⸃ߢ߈ࠆ㧚 㧡㧚ಾᴺ㕙ߩቯ⸃ᨆ 1999 ᐕ 12 ᣨߦᵤᐈ↸┻ᯅߩಾᴺ㕙 㧔1998 ᐕ 2 ਛᣨಾขࠅቢੌ㧘࿑ ෳᾖ㧕ߦ߅ߡ㧘 ⵚߥߤߩᄌ⁁߇⏕ߐࠇߚ㧚ߎߩ┻ᯅߦ߅ ߡ߽㧘ർਛ᧦ߣห᭽ߦ⋚ਛߦᄙߊߩ㤛㋕㋶ࠍ ߒߡࠆ㧚ᢥ₂ 3)ߦࠃࠆߣ㧘ಾᴺ㕙ߪએਅߩࠃ ߁ߥ⁁ᴫߢߞߚ㧚 (1) ߚࠅ৻㕙ߦ⎫ൻ᳓⚛⥇㧘⎫㤛⥇߇┙ߜㄟࠄ ࠇߡߚ㧚 (2) ᴺ㕙ోࠍᷰߔߣ㧘ᬀ↢߇ㅌߒߚ▎ᚲߣ⦟ ᅢߥ▎ᚲߣ߇⏕ߦಽ߆ࠇߡߚ㧚 (3) ዊᲑࠦࡦࠢ࠻߿ࠦ࡞ࠥ࠻ឃ᳓Ḵߩ㕙ߪ ⿒ⶊ⦡ߦᄌ⦡ߒߡ߅ࠅ㧘․ߦࠦࡦࠢ࠻߇ᄌ ⦡ߒߚㇱಽߦធߒߚᴺ㕙ߩᬀ↢ߪቢోߦㅌߒ ߡߚ㧚 ߎࠇࠄߩ⁁ᴫ߆ࠄផኤߔࠆߣ㧘ᴺ㕙ߩᄌ⁁ߪ㤛㋕ ㋶ߩ㉄ൻᔕߦࠃࠆ⋚ߩ㉄ᕈൻ߇ේ࿃ߢࠆߣᕁ ࠊࠇࠆ㧚ᢥ₂3)ߦࠃࠆߣ㧘ᒰ႐ߩಾขࠅ൨㈩ߪ 1 : 1.5㧔33.7°㧕ߢ㧘㧝Ბ⋡ߩಾขࠅᎿࠍ⚳ੌߒ㧘㧞Ბ ⋡ߩಾขࠅᎿࠍⴕߞߡࠆᦨਛߦ㧘ᴺ㕙ዊᲑㇱߦ ߅ߡᒁᒛⵚ㧘ߩࠅዥㇱߦ߅ߡ❗ⵚ߇⊒↢ ߒߚ㧚ᄌ⁁ߩ⁁ᴫ߆ࠄ㧘࿑ ߦ␜ߔࠃ߁ߥᒐ⁁ ߩߔߴࠅ㕙߇ᗐቯߐࠇࠆ㧚ߎߩߔߴࠅ㕙ࠍ↪ߡᴺ 㕙፣უᤨߩᒝᐲቯᢙc㧘Ǟࠍㅒ▚ᴺࠃࠅ᳞ߚ㧚ᴫ ߩో₸Fsࠍ0.98㧘ߩනⓍ㊀㊂ࠍ 18.0kN/m3㧘 Ǟ=12.5q㧔〝Ꮏ㧙ߩࠅ㕙Ꮏᢳ㕙ቯᎿᜰ㊎21㧕 ࠍෳ⠨㧕ߣߒߡFellenius ߩ◲ଢಽഀᴺߦࠃࠅ⸃ᨆߒ ߚ⚿ᨐ㧘ᴺ㕙፣უᤨߩ☼⌕ജc=8.04kPa ߇ᓧࠄࠇߚ㧚 ߹ߚ㧘ㅢᏱߩಾᴺ㕙ߦߪFs=1.2 ߩో₸߇ㄟ߹ ࠇߡࠆߎߣ߆ࠄ㧘Fs=1.2㧘߆ߟǞ=12.5q৻ቯߣ ቯߒߡౣᐲ⸃ᨆߒߚ⚿ᨐ㧘c=11.01kPa ߇ᓧࠄࠇߚ㧚 ࿑ ߦc ߣ tanǞߩ㑐ଥࠍ␜ߔ㧚࿑ ࠍߡ߽ࠊ߆ ࠆࠃ߁ߦ㧘㤛㋕㋶ࠍߔࠆ☼ᕈߩ৻ゲ❗ᒝᐲߪ㧘 ㉄ᕈൻ߇ㅴⴕߔࠆߎߣߦࠃߞߡ⪺ߒߊૐਅߔࠆ㧚ߒ ߚ߇ߞߡ㧘ᒰᤨߩಾᴺ㕙㧔㉄ᕈൻߔࠆ೨㧕ߪ㧘ᅷ ᒰߥ⸳⸘ߢߞߚߣᕁࠊࠇࠆ㧚ಾขࠅᎿߦࠃߞߡ ߇ᄢ᳇ߦᦑߐࠇ㧘ߘߩ⋥ᓟ߆ࠄ㤛㋕㋶ߣ㉄⚛߇ ᔕߒᆎ㧘㉄ᕈൻ߇ᓢޘߦㅴⴕߒ㧘ߘߩ⚿ᨐ㧘⋚ ߩߖࠎᢿᒝᐲࠍ⪺ߒߊૐਅߐߖߚߩߢߪߥ߆ߣ⠨ ߃ࠄࠇࠆ㧚 1 : 1.5 ផቯၮጤ 䈜䈼䉍㕙䋨ផቯ䋩 ᣥᒻ ಾขᴺ㕙 0 5 10 15 20 (m) 〝 ࿑㪄㪈㪈 ಾᴺ㕙፣უߩᢿ㕙࿑
ߘߩᓟ㧘ᢥ₂3)ߦࠃࠇ߫㧘൨㈩ 1 : 2.3㧔23.5°㧕ߢ ౣᐲಾขࠅᎿ㧔2000 ᐕ 4 ਅᣨಾขࠅቢੌ㧕߇ⴕ ࠊࠇߚᓟ㧘ߊߟ߆ߩኻ╷Ꮏ߇ᬌ⸛ߐࠇߚ⚿ᨐ㧘ߩ ࠅᨒᎿ߇ណ↪ߐࠇߚ㧚㧘ᒰᢳ㕙ߪቯࠍߞ ߡࠆ㧚 㧢㧚⚿⸒ ᧄ⎇ⓥߢᓧࠄࠇߚਥߥ⍮ࠍએਅߦㅀߴࠆ㧚 (1) ർਛ᧦☼ᕈߩ৻ゲ❗ᒝᐲ quߪ㉄ᕈൻ߇ㅴⴕ ߔࠆߣߣ߽ߦૐਅߒ㧘ᒝ㉄ᕈߦ߅ߡߪᒰೋߩ 2/3 ⒟ᐲߦ߹ߢૐਅߔࠆ㧚ߎࠇߪ㉄ᕈൻߦ߁ࠦ ࡦࠪࠬ࠹ࡦࠪ㒢⇇ߩૐਅ㧘߽ߒߊߪᶧᕈ㒢⇇㧘 ႟ᕈ㒢⇇㧘߅ࠃ߮ଏ⹜ߩ᳓Ყ߆ࠄ▚ߐࠇࠆ ࠦࡦࠪࠬ࠹ࡦࠪᜰᢙ ICߩૐਅ߆ࠄ߽ℂ⸃ߢ߈ ࠆ㧚 (2) ർਛ᧦☼ᕈߩᄌᒻଥᢙ E50ߣ⎕უ߭ߕߺİfߦߟ ߡߪ㧘pH 4 ઃㄭߢะ߇ᄌൻߔࠆ㧚ߟ߹ࠅ㧘 E50ߪ㉄ᕈൻߣߣ߽ߦૐਅߒ㧘pH 4 ઃㄭࠍਅ࿁ࠆ ߣ㧘ૐਅߩᐲว߇ᐞಽ✭߿߆ߦߥࠆ㧚İfߪ㉄ᕈൻ ߣߣ߽ߦߔࠆ߽ߩߩ㧘pH 4 ઃㄭࠍਅ࿁ࠆߣ㧘 ะ߆ࠄૐਅߦォߓࠆ㧚ታ㓙ߩ㉄ᕈ⋚ߦ ߅ߡE50ࠍᒢᕈଥᢙߣߒߡ⇛ߩᄌᒻ⸃ᨆࠍⴕ ߁㓙ߪ㧘ߎߩὐߦᵈᗧߔࠆᔅⷐ߇ࠆ㧚 (3) ᄌᒻଥᢙ E50ߣ⎕უ߭ߕߺİfߩะߩᄌൻߪ㧘pH 4 ࠍਅ࿁ߞߡ߆ࠄߩ⎫㉄Ⴎ㧘߅ࠃ߮ᒝᾲᷫ㊂ߩᕆ ỗߥჇടะߣ৻⥌ߒߡࠆ㧚 (4) ⫳⇐᳓㧘߅ࠃ߮Ớᐲࠍᄌ߃ߚ⎫㉄᳓ṁᶧࠍട߃ߚ ࠞࠝࡦߩ৻ゲ❗⹜㛎㧘ᶧᕈ႟ᕈ㒢⇇⹜㛎ߩ ⚿ᨐ߆ࠄ㧘⎫㉄ߦࠃࠆ㉄ᕈൻߪ☼ᕈߩᄌᒻᒝ ᐲ․ᕈ㧘ࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇ߦᄙᄢߥᓇ㗀ࠍ ߷ߔ㧚ߔߥࠊߜ㧘⋚ਛߩ⎫㉄ߩ↢ᚑߪ㧘ߩᒝ ᐲߣᄌᒻଥᢙ㧔ᒢᕈଥᢙ㧕ࠍ⪺ߒߊૐਅߐߖࠆ㧚 (5) ታ㓙ߦ፣უߒߚ㉄ᕈ⋚߆ࠄߥࠆಾᴺ㕙ߩ ቯ⸃ᨆࠍⴕߞߚ⚿ᨐ㧘ᒰᤨߩಾᴺ㕙㧔㉄ᕈൻ ߔࠆ೨㧕ߪᅷᒰߥ⸳⸘ߢߞߚߣᕁࠊࠇࠆ㧚ಾข ࠅᎿߦࠃߞߡ߇ᄢ᳇ߦᦑߐࠇ㧘ߘߩ⋥ᓟ߆ࠄ 㤛㋕㋶ߣ㉄⚛߇ᔕߒᆎ㧘㉄ᕈൻ߇ᓢޘߦㅴⴕ ߒ㧘ߘߩ⚿ᨐ㧘ߖࠎᢿᒝᐲࠍ⪺ߒߊૐਅߐߖߚߩ ߢߪߥ߆ߣ⠨߃ࠄࠇࠆ㧚 ᧄ⎇ⓥߪ㧘㤛㋕㋶ࠍߔࠆ☼ᕈ⋚ߩᴺ㕙፣უ ߦ┵ࠍ⊒ߒ㧘⎇ⓥࠍ⛮⛯ߒߡ߈ߚ㧚ᓟ㧘ᴺ㕙ߥߤ ߩ⸳⸘ߦ߅ߡ㧘ߎࠇࠄߩታ㛎ᚑᨐ߇৻ഥߦߥࠇ߫ ᐘߢࠆ㧚 ⻢ㄉ㧦৻ㅪߩቶౝታ㛎ࠍታᣉߔࠆߦᒰߚࠅ㧘ጘ㒂ᄢ ቇᄢቇ㒮ඳ჻೨ᦼ⺖⒟ዊ↰ᙗ৻ำઁ㧘ర⍹ᎹᎿᬺ㜞 ╬ኾ㐷ቇᩞᧄ⑼↢ߩᣇޘߦ㧘ᄙᄢߥදജࠍᓧ߹ߒߚ㧚 ߹ߚᧄ⎇ⓥߪ㧘ᐔᚑ 15 ᐕᐲ16 ᐕᐲᢥㇱ⑼ቇ⋭⑼ ቇ⎇ⓥ⾌ഥ㊄㧔⧯ᚻ⎇ⓥ㧔B㧕No.15760368㧕ߩ ഥࠍฃߌ߹ߒߚ㧚ᧃ╩ߥ߇ࠄ㧘⸥ߒߡᗵ⻢ߩᗧࠍ ߒ߹ߔ㧚 ෳ⠨ᢥ₂
1) Silverman, M. P.㧦Mechanism of bacterial pyrite oxidation, Journal of Bacteriology, Vol.94, pp.1046-1051, 1967㧚 2) ㊁ඳᤘ㧘ጊ↰ᐙ㓶㧘ᅏలม㧘①ౖ㧘⢻Ỉ⌀㧘 ടᴦବᄦ㧦ಾᴺ㕙ߦ߅ߌࠆ㉄ᕈߩᒻᚑߣߘߩᎿቇ ⊛ᕈ⾰ߩផቯᴺ㧘ᣣᧄߔߴࠅቇળ㧘Vol.41㧘No.2㧘 pp.70-76㧘2004㧚 3) ዊ᧖᮸㧘ᧄỈᄥᔒ㧘㊁ඳᤘ㧦ൻቇ⊛㘑ൻ↪ࠍฃ ߌߚ㉄ᕈၸⓍエጤߩࠅ㕙ߩ㐳ᦼቯᕈߦ㑐ߔࠆ⎇ⓥ㧘 ᐔᚑ12 ᐕᐲ⍹ᎹᎿᬺ㜞╬ኾ㐷ቇᩞⅣႺㇺᏒᎿቇ⑼තᬺ ⎇ⓥⷐ㓸㧘pp.11-16㧘2001㧚 4) ஜผ㧘㊁ඳᤘ㧦ࡌࡦ࠻࠽ࠗ࠻ߩᎿቇ⊛․ᕈߦ ߷ߔ᳓⚛ࠗࠝࡦỚᐲᜰᢙߩᓇ㗀㧘ߔߴࠅ㧘Vol.30㧘 No.2㧘pp.30-40㧘1993㧚 5) ஜผ㧘㊁ඳᤘ㧦᳓⚛ࠗࠝࡦỚᐲᜰᢙߩ㆑߇ࡌ ࡦ࠻࠽ࠗ࠻ߩߖࠎᢿ․ᕈߦ߷ߔᓇ㗀㧘ߔߴࠅ㧘 Vol.31㧘No.3㧘pp.37-42㧘1994㧚 6) ஜผ㧘㊁ඳᤘ㧦☼ᕈߩᒝᐲᄌᒻ․ᕈߦ߷ ߔ㉄ᕈൻߩᓇ㗀㧘ᧁቇળ⺰ᢥ㓸㧘No.517㧛III㧙31㧘 pp.189-196㧘1995㧚 7) ᧻ਅ⧷ᰴ㧘ጊᧄືᦶ㧘㋈ᧁ⚛ਯ㧦ߩࠦࡦࠪࠬ࠹ࡦࠪ ߦ߷ߔ pH ߩᓇ㗀㧘ᧁቇળ⺰ᢥ㓸㧘No.617㧛III 㧙46㧘pp.283-297㧘1999㧚 8) ᧻ਅ⧷ᰴ㧘ጊᧄືᦶ㧘㋈ᧁ⚛ਯ㧦☼ߩ‛ℂ⹜㛎ߦ߅ ߌࠆpH ⺞ᢛᴺߣߘߩ㗴ὐ㧘ߣၮ␆㧘Vol.49㧘No.2㧘 pp.25-28㧘2001㧚 9) ᧻ਅ⧷ᰴ㧘ጊᧄືᦶ㧘㋈ᧁ⚛ਯ㧘╣ቁⴕ㧦☼ᕈߩ ৻ᰴరኒ․ᕈߦ߷ߔpH ߩᓇ㗀㧘ᧁቇળ⺰ᢥ㓸㧘 No.757㧛III㧙66㧘pp.57-72㧘2004㧚 10) ਛାਯ㧘ᄥ↰ሶ㧘⮮Ỉኡ㧘ศ↰ᱜᄦ㧦ၸⓍ‛ࠦࠕ ߩ⚛หᲧ㧘C/N Ყ߅ࠃ߮ FeS2㊂߆ࠄߺߚฬ ฎደ᷼ㄝߩฎ᳇㧘ฎᶏ᳓Ḱᄌേ㧘╙྾♿⎇ⓥ㧘Vol.21㧘 No.3㧘pp.169-177㧘1982㧚 11) ජᧁ⦟㓷ᒄ㧦ᵆጤߩൻቇ⊛㘑ൻ㧘ᣂẟ⋵ᦝᣂ⛔ἯῪጀ ߩ㧘⾰ቇ㔀㧘Vol.94㧘pp.419-431㧘1988㧚 12) ජᧁ⦟㓷ᒄ㧦㧠㧚エጤߩ㘑ൻ↪㧔⻠ᐳ㧦ᑪ⸳Ꮏߦ ߅ߌࠆ㘑ൻᄌ⾰↪ߩขᛒᣇ㧕㧘ߣၮ␆㧘Vol.40㧘 No.8㧘pp.71-79㧘1992㧚 13) ᄢጊ㓉ᒄ㧘ජᧁ⦟㓷ᒄ㧘ᄢ⋥㧘ᷰㇱ⦟㧦ᵆጤߩ ൻቇ⊛㘑ൻߦࠃࠆቛၮ␆ߩ⋚⤘ࠇ㧘ᔕ↪⾰㧘Vol.39㧘 No.3㧘pp.261-272㧘1998㧚
14) Fukue, M., Sato, Y., Yamashita, M., Yanai, M. and Fujimori, Y.: Change in microstructure of soils due to natural mineralization, Applied Clay Science, Vol.23, pp.169-177, 2003. 15) ㊁ඳᤘ㧘ጊ↰ᐙ㓶㧘ᄥ↰ታ㧘⢻Ỉ⌀㧦㉄ᕈ⒖ⴕࠍ ๒ߔࠆߩᒝᐲ㧘ᄌᒻ․ᕈߦ㑐ߔࠆ⎇ⓥ㧘ᧁቇળ⺰ ᢥ㓸㧘No.575㧛III㧙40㧘pp.159-167㧘1997㧚 16) ㊁ඳᤘ㧘ጊ↰ᐙ㓶㧘ᄥ↰ታ㧘⢻Ỉ⌀㧘ᷰㆻᐽੑ㧦 ㉄ᕈ⒖ⴕࠍ๒ߔࠆߩࠦࡦࠪࠬ࠹ࡦࠪ㒢⇇ߦ㑐ߔࠆ ⎇ⓥ㧘ᧁቇળ⺰ᢥ㓸㧘No.610㧛III㧙45㧘pp.97-104㧘 1998㧚 17) ㊁ඳᤘ㧘ጊ↰ᐙ㓶㧘ᅏలม㧘⢻Ỉ⌀㧘ᐔੑ㧦 Ⓧ▚᷷ᐲᣇᑼࠍዉߒߚߩ㉄ᕈ⒖ⴕㅦᐲߩ⹏ଔᚻᴺ ߦ㑐ߔࠆ⎇ⓥ㧘ᧁቇળ⺰ᢥ㓸㧘No.687㧛III㧙56㧘 pp.95-105㧘2001㧚 18) ㋈ᧁ⡡㧘⮮↰ᵗᐔ㧘ዊፉᷕ㧘Ⴆ⣁⌀ੑ㧦⍹Ꮉ⋵㊄ᴛᏒ ർㇱਇേኹ㨪ᵤᐈ↸ධㇱᵻ↰ၞߩ⾰㧘ᣣᧄᶏၞ⎇ ⓥ㧘No.34㧘pp.67-99㧘2003㧚 19) 㧔␠㧕⋚Ꮏቇળ㧦╙㧟✬ ൻቇ⹜㛎㧔╙㧞┨ Ộ ᶧߩ pH ⹜㛎㧕㧘⾰⹜㛎ߩᣇᴺߣ⸃⺑㧘pp.159-165㧘 2000㧚 20) 㧔␠㧕⋚Ꮏቇળ㧦╙㧟✬ ൻቇ⹜㛎㧔╙㧠┨ ߩ᳓ ṁᕈᚑಽ⹜㛎㧕㧘⾰⹜㛎ߩᣇᴺߣ⸃⺑㧘pp.170-185㧘 2000㧚 21) 㧔␠㧕ᣣᧄ〝දળ㧦〝Ꮏ㧙ߩࠅ㕙Ꮏᢳ㕙ቯ Ꮏᜰ㊎㧘1999㧚 㧔 ฃઃ㧕
GEOTECHNICAL PROPERTIES OF ACIDIFIED COHESIVE SOIL WITH PYRITES
Hiroaki SHIGEMATSU, Shingo HIGASHI, Hironobu IKEMURA, Yohei SAWAMOTO,
Sohei HAYASHI, Masachika NOZAWA and Atsushi YASHIMA
Acidification with pyrites changes geotechnical properties of cohesive soil extremely, and will cause geotechnical disasters such as slope failure etc.. In order to clarify the influence of the acidification on geotechnical properties, the cohesive soil with pyrites is investigated with a series of laboratory tests. The following conclusions are obtained from the present study: 1. Acidification of cohesive soil with pyrites reduces liquid limit and plastic limit. 2.Unconfined compressive strength decreases gradually by acidification of cohesive soil. 3.Sulfate content of cohesive soil influences consistency limit and unconfined compressive strength.
