◊✲䛾⫼ᬒ • • • • 㧗ྵỈẚ䛾ᆅ┙ᮦᩱ䛾ຊᏛ≉ᛶ 䛾ゎ᫂ ᾏ㐨Ꮫ ⏣୰ὒ⾜ ᓊቨ䛾Ỉ῝䠈⯟㊰䛾⥔ᣢ䞉⟶⌮ 㔞䛾ὼ ᅵ◁䛜Ⓨ⏕ 㐺ษ䛺ฎ⌮䛾ᚲせᛶ䠄⎔ቃ䠈᭷ຠ⏝䠅 ⢓ᛶᅵ䠇㧗ྵỈẚ – ㏻ᖖ䛾ᅵ䛸䛿␗䛺䜛(ᅵ䛸Ỉ䛾୧᪉䛾ᛶ㉁䠅 – ⢓ᛶ䠄䜂䛪䜏㏿ᗘ䛻䜘䛳䛶ᢠ䛜ኚ䠅 – 㠀ᖖ䛻䛝䛺䜂䛪䜏䠄ኚᙧ䠅 – 䝺䜸䝻䝆䞊 1 㧗ྵỈẚ䛾ᅵ◁䛾≉ᛶ 䛾ศ㔝䛷䜒㔜せ 2 ✀䚻䛾≀㉁䛾㏿ᗘ䛸ᢠ䛾㛵ಀ ᅵ䜢ጞ䜑䛸䛧䛶ከ䛟䛾≀㉁䛿 䝡䞁䜺䝮ὶయ Shearstrength ᢠ HerschelͲBulkley Bingham Casson Newtonian ᾏᗏᆅ䜚 䠄Storegga slide) BritishGeologicalSurvey䜘䜚 Newtonὶయ Ỉ䛜ᆺⓗ Shearrate ᅵ▼ὶ Ἶὶ ㏿ᗘ 䠄䛫䜣᩿㏿ᗘ䠅 3 4 ὶື≉ᛶ䛾ồ䜑᪉ ᅇ㌿⢓ᅵィ䠄Viscometer) ㏻ᖖ䛾ヨ㦂ᶵ 䠄ᆅ┙ᕤᏛ䛷⏝䛔䜙䜜䛶䛔䜛䠅 ᅇ㌿㏿ᗘ䜢ᚎ䚻䛻ቑຍ ヨᩱ䛜ᰂ䜙䛛䛔䛾䛷䠈୍㍈䛺䛹䛾ヨ㦂䛿↓⌮ ෆᚄ እᚄ 䝧䞊䞁ヨ㦂䛜୍⯡ⓗ ୍ᐃ䛾ᅇ㌿㏿ᗘ 6㼻/min ᩿㠃ᅗ ⊃䛔䠖䜂䛪䜏䜢ᆒ୍䛻䛩䜛䛯䜑 cup soil 䛝䛺ᐜჾ 䜂䛪䜏䛾ᴫᛕ䛿䛺䛔 Z ᖹ㠃ᅗ cylinder ヨᩱ 㣗ရ䠈⢝ရ䠈䜸䜲䝹䛺䛹䛾ከ䛟䛾⏘ᴗ䛷ከ⏝䛥䜜䛶䛔䜛 6 5 ᅵᮌ䛻䛚䛡䜛ᅵ䛾䝺䜸䝻䝆䞊≉ᛶ䛾 ◊✲ ᅇ㌿⢓ᗘィ䛾䝯䜹䝙䝈䝮 cup soil 㝆అ್ Z ᅵ㉁ຊᏛ 㭯㇂䠈䠄1986䠈1989䠅 Ἑᕝ䠈ᾏᓊᕤᏛ ᆅ┙ᕤᏛ ረᛶ㝈⏺ cylinder ὶయຊᏛ ᾮᛶ㝈⏺ Cup(ᐜჾ䠅 Ỉ䛾ὶ䜜䛻䜘䜛ᅵ◁䛾ᕳ䛝䛒䛢 h x ྵỈẚ ᅇ㌿᪉ྥ 7 ᅇ㌿య 8 ᙉᗘ䛾ᕪ䛜⏕䛨䛯ཎᅉ 㝆అ್䠄⢓ᅵィ䠅䛸䝧䞊䞁ᙉᗘ䛾ẚ㍑ • ᅇ㌿య䛾㐪䛔䠛 120 M – 䝧䞊䞁䠈ᰕ Ỉᓥ ⢓ᅵ ⢓ᅵィ 㝆అ್ Wy(Pa) 100 ᚨᒣ ⢓ᅵ 䜂䜃䛝⢓ᅵ 80 㛛ྖ ⢓ᅵ • ᣊ᮰᮲௳䛾㐪䛔䠛 0.2 60 – ⢓ᅵィ ᐜჾ䠄㝽㛫䛜ᑠ䛥䛔䠅 – 䝧䞊䞁 䛺䛧 40 20 0.1 • ᅇ㌿㏿ᗘ䛾㐪䛔䠛 0 0 100 200 300 400 ࣮࣋ࣥࡏࢇ᩿ᙉᗘ WvanePa – 䝧䞊䞁 6㼻/min ᕸ㇂䠈ᅵ⏣䠈 (2012) ᅇ㌿⢓ᗘィᚓ䜙䜜䛯㝆అ್䛿䝧䞊䞁ᙉᗘ䛾0.1䛛䜙0.2 9 10 ᰕ䛸䝧䞊䞁䛾㐪䛔 6㼻/min䛷ヨ㦂 ᅇ㌿య䠄ᰕ䠅䛾ᮦ㉁䛾ᙳ㡪 200 150 300 ShearStress(Pa) ShearStress(Pa) 400 Stainless Aluminum Acryl 100 KasaokaClay w=73.6% w/wL=1.2 6deg/min 200 KasaokaClay w=73.6% w/wL=1.2 6deg/min 50 100 VaneBlade 0 0 20 40 60 RotateAngle(deg) 80 100 Stainless 0 0 ᮦ㉁䛾㐪䛔䛻䜘䜛ᙳ㡪䛿䛺䛧䚹 30 60 RotateAngle(deg) 90 ᑡ䛺䛟䛸䜒䠈㐜䛔ᅇ㌿㏿ᗘ䛷䛿䝧䞊䞁䛾᪉䛜ᙉᗘ䛜䛝䛟䛺䜛 11 12 䛩䜉䜚㠃䛾ᵝᏊ ቃ⏺᮲௳䛾ᙳ㡪 250 0.60 200 ShearStress(Pa) Shearratio Wc/Wvane 䝧䞊䞁 KasaokaClay 6deg/min 0.50 150 ᣊ᮰᭷䜚(h=4mm) ᣊ᮰↓䛧(h=ь) 100 KasaokaClay 6deg/min Vane Blade w/wL=1.4 50 0.40 0 0 Stainless 30 60 RotateAngle(deg) 0.30 0.8 1 1.2 1.4 90 䝧䞊䞁 1.6 120 NormalizedWaterContentw/wL ShearStress(Pa) ᣊ᮰䛒䜚(h=4mm) ྵỈẚ䛾ᙳ㡪 ᰕ ᣊ᮰䛾ᙳ㡪䛿䜋䛸䜣䛹䛺䛔 ᰕ䛾ሙྜ䠈䛳䛶䛔䜛 䛣䛾䠎䛴䜢⪃䛘䜛䛸 ᰕ䛾ሙྜ䛷䛿䛳䛶䛔䜛 ᣊ᮰䛺䛧(h=ь) 90 60 KasaokaClay 6deg/min Stainless w/wL=1.4 30 0 0 30 60 RotateAngle(deg) 90 ᰕ ᅇ㌿⢓ᗘィ䛷䜂䛪䜏䛜ᆒ୍䛸䛔䛖๓ᥦ䛿䠛 13 14 ᅇ㌿㏿ᗘ䛾ᙳ㡪 ᅇ㌿㏿ᗘ䛜㏿䛟䛺䛳䛯ሙྜ ᅇ㌿⢓ᗘィ䛷୍ᐃ㏿ᗘ Cylinder 90 VaneBlade Cylinder 60 30 60 40 20 VaneBlade Cylinder 0 500 1000 1500 2000 RotateAngle(deg) VaneBlade(ᣊ᮰䛺䛧) VaneBlade 30 Cylinder(ᣊ᮰䛺䛧) 100 0 100 150 RotationSpeed(RPM) 200 10000 250 ᣊ᮰᮲௳䛿↓ど䛷䛝䜛 ᰕ䛸䝧䞊䞁䛾ᙉᗘ䛜㏫㌿䛩䜛 60 40 VaneBlade 20 100 RotationSpeed=200(RPM) 80 40000 KasaokaClay w=88.4% w/wL=1.43 ᣊ᮰䛺䛧 60 40 VaneBlade 20 Cylinder Cylinder 0 0 0 15 20000 30000 RotateAngle(deg) 20rpm KasaokaClay w=88.4% w/wL=1.43 ᣊ᮰䛺䛧 RotationSpeed=2(RPM) 80 50 0 0.2rpm VaneBlade(ᣊ᮰䛒䜚) Cylinder(ᣊ᮰䛒䜚) 0 0 2500 ShearStress(Pa) 60 KasaokaClay w=88.4% w/wL=1.43 ᣊ᮰䛺䛧 RotationSpeed=20(RPM) 0 ShearStress(Pa) ShearStress(Pa) KasaokaClay w=84.3% w/wL=1.36 90 80 ShearStress(Pa) ShearStress(Pa) RotationSpeed=0.2(RPM) 150 120 KasaokaClay w=88.4% w/wL=1.43 ᣊ᮰䛺䛧 120 ᅇ㌿⢓ᗘィ䛷ヨ㦂 2000 4000 6000 RotateAngle(deg) 2rpm 8000 0 50000 100000 RotateAngle(deg) 200rpm 150000 16 ⤖ㄽ䠍 ప㏿ᗘ䛷䛾ᅇ㌿⢓ᗘィၥ㢟Ⅼ 䝧䞊䞁䛾ᅇ㌿㏿ᗘ䛿6㼻/min 160 0.017rpm ⢓ᅵィ䛾ᵓ㐀 • 䝧䞊䞁ᙉᗘ䛿ᅇ㌿㏿ᗘ䛜㏿䛟䛺䜛䛸ᙉᗘ䛜 䛝䛟䛺䜛䛸ゝ䜟䜜䛶䛔䜛䛜䠈ᚲ䛪䛧䜒䛭䛖䛷䛺 䛔䠄≉䛻ᅇ㌿ᩘ䛜㏿䛟䛺䜛䛸䠅 • ᅇ㌿⢓ᅵィ䛿ᅇ㌿㏿ᗘ䛜ẚ㍑ⓗ᪩䛔≧ែ䛻 㐺䛧䛯䜘䛖䛻స䜙䜜䛶䛔䜛䛾䛷䠈㐜䛔ሙྜ䛻 䛿ಙ㢗ᛶ䛻ஈ䛧䛔䠄≉䛻㝆అ್䜢ồ䜑䜛䛸䛝 䛻ὀព䠅 䝇䝥䝸䞁䜾䛜㠀ᖖ䛻ᰂ䜙䛛䛔 ᙉᗘ䛜Ⓨ䛩䜛䜎䛷䠈ᅇ㌿ゅᗘ䛜ᚲせ – ィ ᶵᵓ䠄䝇䝥䝸䞁䜾䛜ᰂ䜙䛛䛔䠅 – ᙉᗘ䛜Ⓨ䛩䜛䜎䛷䠈୍ᐃ䛾ᅇ㌿ゅᗘ䛜ᚲせ KasaokaClay w=88.4% w/wL=1.43 ᣊ᮰䛺䛧 VaneBlade ShearStress(Pa) 120 80 40 RotationSpeed=0.05(RPM) RotationSpeed=0.2(RPM) 0 0 30 60 90 RotateAngle(deg) 䝧䞊䞁 KasaokaClay w=88.4% w/wL=1.43 ᣊ᮰䛺䛧 120 Cylinder ShearStress(Pa) 90 60 30 RotationSpeed=0.05(RPM) RotationSpeed=0.2(RPM) 0 0 30 60 90 RotateAngle(deg) ᰕ 17 ⤖ㄽ䠎 • ᅇ㌿⢓ᗘィ䛛䜙䛫䜣᩿㏿ᗘ䜢ồ䜑䜛௬ᐃ 䠄䜚䛜⏕䛨䛺䛔䠅䛿䠈᳨ウ䜢せ䛩䜛䚹 • ᚑ᮶䛾᪉ἲ䠄ᅇ㌿⢓ᗘィ䠅䛷ồ䜑䛯⢓ᛶ䛒䜛 䛔䛿㝆అ್䛾ᕤᏛⓗጇᙜᛶ䛿䠈⌧㇟䠄ᐇ⌧ ㇟䠈ᶍᆺᐇ㦂䠅䛸ᩘ್ゎᯒ䜢⏝䛔䛶᳨ド䛩䜛 ᚲせ䛒䜚䚹 19 18
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