㻌➨  ᅇᅵ◁⅏ᐖ࡟㛵ࡍࡿࢩ࣏ࣥࢪ࣒࢘ㄽᩥ㞟㸪 ᖺ  ᭶㻌㐃⥆ຍᅽᘧಖỈᛶヨ㦂ࢆά࠿ࡋࡓ୙㣬࿴ᅵࡢࡏࢇ᩿ᙉᗘ⟬ᐃࡢࡓࡵࡢᛂຊศᢸ⿵ṇ࡜ࡑࡢࢩࢫࢸ࣒COMBINED SHEARING BOX AND CONTINUOUS PRESSURIZATION SYSTEM TO DETERMINETHE UNSATURATED SOILS STRENGTH USING NORMAL STRESS SUPERPOSITION㻌┦Ⰻ▱㍤ ࣭࢔ࣟ࢘࢖ࢩ̿࢔ࢹࣝ 2࣭Ᏻ⚟つஅ 3࣭▼⸝ Ⰻᖹ 4࣭␊ᒣ ṇ๎ 5࣭ி㔝 ಟ 5Tomoki SAGARA, Adel ALOWAISY , Noriyuki YASUFUKU, Ryohei ISHIKURA,Masanori HATAKEYAMA and Shuu KYONO
1 ஑ᕞ኱Ꮫ኱Ꮫ㝔ᕤᏛᗓᅵᮌᕤᏛᑓᨷ㸦ࠛ⚟ᒸᕷす༊ඖᒸ  ␒ᆅ㸧E-mail: sagara.tomoki.945@s.kyushu-u.ac.jp2 ஑ᕞ኱Ꮫ኱Ꮫ㝔ᕤᏛ◊✲㝔㸦ࠛ⚟ᒸᕷす༊ඖᒸ  ␒ᆅ㸧E-mail: a.adel@civil.kyushu-u.ac.jp
3 ஑ᕞ኱Ꮫ኱Ꮫ㝔ᕤᏛ◊✲㝔㸦ࠛ⚟ᒸᕷす༊ඖᒸ  ␒ᆅ㸧E-mail: yasufuku@civil.kyushu-u.ac.jp
4 ஑ᕞ኱Ꮫ኱Ꮫ㝔ᕤᏛ◊✲㝔㸦ࠛ⚟ᒸᕷす༊ඖᒸ  ␒ᆅ㸧E-mail: ishikura@civil.kyushu-u.ac.jp
5 ᛂ⏝ᆅ㉁ᰴᘧ఍♫㸦ࠛᮾி㒔༓௦⏣༊⚄⏣⨾ᅵ௦⏫  ␒ᆅ㸧
㻌

Key Words: unsaturated soil, SWCC hysteresis, shear strength, stress superposition㻌㸬ࡣࡌࡵ࡟

ࢀࢆỈศ≉ᛶ᭤⥺ࡢࣄࢫࢸࣜࢩࢫ࡜࠸࠺. ࡑࢀ࡟㛵㐃ࡋ࡚, ୙㣬࿴ᅵ࡟ᑐࡋ୍࡚㠃ࡏࢇ᩿ヨ㦂ࢆ⾜࠺࡜,㏆ᖺ,᪥ᮏ࡛ࡣẼೃኚື࡟ࡼࡾ㇦㞵ࡢⓎ⏕ᅇᩘࡀᅽᐦᛂຊࡸࢧࢡࢩࣙࣥࢆᶓ㍈࡜ࡋࡓࡏࢇ᩿ᙉᗘ, ࡑቑຍࡋ࡚࠸ࡿ 1) .≉࡟,௧࿴ 2 ᖺ 7 ᭶஑ᕞ㇦㞵➼ࡢࡢࣃ࣓࣮ࣛࢱ࡛࠶ࡿ⢓╔ຊ࡜ෆ㒊ᦶ᧿ゅࡣ, ᤼Ỉ㐣኱㞵࡟ࡼࡿἙᕝሐ㜵ࡢỴቯࡸᩳ㠃ᔂቯࡢ஧ḟ⅏ᐖࡣ⛬࡜྾Ỉ㐣⛬࡛␗࡞ࡿྍ⬟ᛶࡀ࠶ࡿ. ࡇࡢࡇ࡜ࡣ,2). ࡇࡇ࡛, ㇦㞵࡟ࡼࡿ㝆㞵࡟ࡼࡿᩳ㠃Ᏻᐃᛶࢆホ౯ࡍࡿ࡟ࡣ, Ỉศ≉ᛶ᭤ᩳ㠃ᔂቯࡢ୺࡞ཎᅉࡣ, 㞵ࡀ㝆ࡗ࡚Ỉࡀᾐ㏱ࡋࡓࡾ⥺࡜୙㣬࿴ࡏࢇ᩿ᙉᗘࢆ㛵㐃௜ࡅ࡚ホ౯ࡍࡿࡇ࡜ࡀ

⵨Ⓨࡋࡓࡾࡋ࡚, ᅵࡢࡏࢇ᩿ᙉᗘࡀኚ໬ࡍࡿࡇ࡜࡛㔜せ࡛࠶ࡿࡇ࡜ࢆ♧၀ࡍࡿ.

⏒኱࡞⿕ᐖࢆཬࡰࡋ࡚࠸ࡿ୙㣬࿴ᅵࡢࡏࢇ᩿ᙉᗘ࡟㛵ࡋ࡚ࡣ, 㐣ཤ࡟ᵝࠎ࡞࠶ࡿ. ᐇ㝿ࡢᅵ୰࡛ࡣ, Ỉࡢᾐ㏱ࡸ⵨Ⓨ࡟ࡼࡗ࡚㣬࿴≧ែ࡜୙㣬࿴≧ែࢆ⧞ࡾ㏉ࡋ࡚࠸ࡿ. ࡑࢀ࡟కࡗ◊✲ࡀ⾜ࢃࢀ࡚ࡁࡓ. ࡑࡢ୰࡛ࡶ Bishop ࡽࡣ, ୙㣬࡚㣬࿴ᗘࡸྵỈẚࡀኚ໬ࡍࡿࡇ࡜࡛, ࢧࢡࢩࣙࣥ࡜࿴ᅵ࡟ᑐᛂࡋࡓࡏࢇ᩿ᙉᗘᘧࢆᥦ᱌ࡋ, ࡑࢀࡽࡣ㣬ࡑࢀ࡟㉳ᅉࡍࡿ⢓╔ຊࡀኚ໬ࡋ, ࡏࢇ᩿ᙉᗘࡶኚ໬࿴ᗘࡸࢧࢡࢩࣙࣥ࡞࡝ࡢỈศ≉ᛶࢆᚲせ࡜ࡍࡿࡇ࡜

ࡍࡿ. ࢧࢡࢩࣙࣥ࡜ࡣ✵Ẽᅽ࡜Ỉᅽࡢᕪ࡛Ỉࢆ྾࠸ࢆ♧ࡋࡓ 3) . ࡋ࠿ࡋ, ࡇࡢᘧࡣᇶᮏⓗ࡟᤼Ỉ㐣⛬࡜ୖࡆࡿຊ࡛, ࡇࢀ࡜ྵỈẚ㸦㣬࿴ᗘ㸧ࡢ㛵ಀࢆỈศ྾Ỉ㐣⛬ࢆศࡅ࡚⪃࠼࡚࠾ࡽࡎ, Ỉศ≉ᛶ᭤⥺ࡢࣄ≉ᛶ᭤⥺࡜࠸࠺. Ỉศ≉ᛶ᭤⥺࡛ࡣ୍⯡࡟, ࢧࢡࢩࢫࢸࣜࢩࢫࡢᙳ㡪ࢆ཯࡛ᫎࡁ࡞࠸ྍ⬟ᛶࡀ࠶ࡿ. ୍ࣙࣥࡢ್ࡀྠࡌ࡛ࡶ, Ỉࡀ⵨Ⓨࡍࡿ᤼Ỉ㐣⛬ࡼࡾỈ⯡ⓗ࡟, ୙㣬࿴ᅵࡢຊᏛⓗᣲືࢆᢕᥱࡍࡿࡓࡵ࡟ࡣ

ࡀᾐ㏱ࡍࡿ྾Ỉ㐣⛬ࡢ᪉ࡀྵỈẚࡣᑠࡉࡃ࡞ࡿ. ࡇ୙㣬࿴୕㍈ᅽ⦰ヨ㦂ࡀ⾜ࢃࢀࡿ. ࡋ࠿ࡋ, ࡇࡢヨ㦂

― 25 ―ࡣ」㞧࡛㛗᫬㛫࠿࠿ࡿ. ୍᪉࡛, ୍㠃ࡏࢇ᩿ヨ㦂ࡣ᭤⥺ࢆồࡵࡿࡓࡵ࡟㐃⥆ຍᅽᘧಖỈᛶヨ㦂ࢆ⾜ࡗヨ㦂᪉ἲࡀẚ㍑ⓗ⡆౽࡛࠶ࡾ, ౪ヨయ᤼Ỉ㊥㞳ࡀ▷࡚, ࡏࢇ᩿ᙉᗘࢆ⟬ᐃࡍࡿࡓࡵࡢࣃ࣓࣮ࣛࢱ࡛࠶ࡿ࠸ࡓࡵヨ㦂᫬㛫ࡀ▷࠸ࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿ. ࡇࢀࢆ⢓╔ຊ࡜ෆ㒊ᦶ᧿ゅࢆồࡵࡿࡓࡵ࡟ᐃయ✚୍㠃ࡏࢇ

㋃ࡲ࠼࡚, Ỉศ≉ᛶ᭤⥺࡜ࡏࢇ᩿ᙉᗘࡢ⡆᫆ィ᩿ヨ㦂ࢆಖỈᛶヨ㦂࡜ࡣูࡢ⿦⨨࡛ᐇ᪋ࡍࡿ.

ࢩ. ࡇࡇ࡛ࡣ, ಖỈᛶヨᮏ◊✲࡛ࡣ, ᅵ⢏Ꮚᐦᗘࡀ 2.329g/cm3 ࡛ᅗ̾1 ࡢ㦂࡟ࡼࡗ࡚ồࡵࡓỈศ≉ᛶ᭤⥺ࡢ㣬࿴ᗘࢆᇶ‽࡜ࡋ⢏ᗘࢆ♧ࡍ㜿⸽㯮ࡰࡃࢆ౑⏝ࡋࡓ. ౪ヨయࡣ⮬↛≧࡚, ⡆᫆ⓗ࡞ᐃᅽ୍㠃ࡏࢇ᩿ヨ㦂ࢆ⾜ࡗ࡚ࡏࢇ᩿ᙉែࡢ‵₶ᐦᗘ࡛┤ᚄ 5cm, 㧗ࡉ 5cm ࡢ෇ᰕᆺ࡟⥾ᗘࢆồࡵࡓ. ࡑࡢ⤖ᯝ, Ỉศ≉ᛶ᭤⥺ࡢ᤼Ỉ㐣⛬࡜ࡵᅛࡵࡓᚋ, 100kPa ࡢ┿✵ᅽ࡛ 24 ᫬㛫௨ୖ⬺Ẽ㣬྾Ỉ㐣⛬, 㣬࿴ᗘ࡛⢓╔ຊࡀ␗࡞ࡾ, ෆ㒊ᦶ᧿ゅࡣ࿴ࡉࡏࡓ.

ࢫࢸ࣒ࡢ㛤Ⓨࡀ⾜ࢃࢀࡓ4) , 5)㣬࿴ᗘ࡟౫ࡽࡎ࡯ࡰ୍ᐃ࡛࠶ࡿࡇ࡜ࡀ♧ࡉࢀࡓ.ࡋ㐃⥆ຍᅽᘧಖỈᛶヨ㦂࡛ࡣ, ᅗ̾2 ࡟♧ࡍヨ㦂⿦⨨࠿ࡋ, ᐃᅽ୍㠃ࡏࢇ᩿ヨ㦂࡛ࡣࡏࢇ᩿᫬࡟య✚ࡀኚ࡟✵Ẽᅽࢆὀධࡋ࡚ヨᩱࢆຍᅽࡋ, ࢧࣥࣉࣝෆ࡟タ໬ࡍࡿࡇ࡜࠿ࡽ, ࡑࢀ࡟కࡗ࡚Ỉศ≉ᛶࡀኚ໬ࡍࡿ⨨ࡋࡓ࣐࢖ࢡࣟࢸࣥࢩ࣓࣮࢜ࢱ࣮࡛Ỉᅽࢆྍ⬟ᛶࡀ࠶ࡿ. ࡲࡓ, ಖỈᛶヨ㦂࡜୍㠃ࡏࢇ᩿ヨ㦂ࡇ࡜࡛, ࢧࢡࢩࣙࣥࢆ⤒᫬ⓗ࡟ồࡵࡿࡇ࡜ࡀ࡛ࡁࡿࡢ⿦⨨㛫࡛౪ヨయࡢࢧ࢖ࢬࡢ㐪࠸ࢆㄪᩚࡍࡿ㝿࡟,6) , 7)

౪ヨయ࡜ྠࡌ᮲௳ࡢヨᩱࢆᩜࡁワࡵ࡚࠸ࡓࡇ࡜࠿

ᐃࡍࡿ. 㐃⥆ຍᅽᘧࡢ฼Ⅼ࡜ࡋ࡚ࡣ, Ỉᅽࢆ⢭ᗘⰋࡃᐃࡍࡿࡇ࡜࡛㧗⢭ᗘ࡞ࢧࢡࢩࣙࣥࢆồࡵࡽࢀࡿࡇ

ࡽ, ヨ㦂ࡀᅔ㞴࡛෌⌧ᛶࡀప࠸࡜⪃࠼ࡽࢀࡿ.

࡜, ヨ㦂᫬㛫ࡀ▷ࡃᡭ㡰ࡀẚ㍑ⓗ⡆༢࡛࠶ࡿࡇ࡜,ࡑࡇ࡛ᮏ◊✲࡛ࡣ, ⅆᒣ⅊㉁⢓ᛶᅵ࡛࠶ࡿ㜿⸽㯮㐃⥆ࡋࡓỈศ≉ᛶ᭤⥺ࡀᚓࡽࢀࡿࡇ࡜ࡀᣲࡆࡽࢀ

ࡰࡃࢆᑐ㇟࡟, ಖỈᛶヨ㦂࡛┠ᶆࡢࢧࢡࢩࣙࣥࢆண

ࡿ. ࢧࢡࢩࣙࣥࡀ᤼Ỉ㐣⛬࡛ 30, 80kPa, ྾Ỉ㐣⛬࡛ࡵタᐃࡋ࡚Ỉศ≉ᛶ᭤⥺ࢆồࡵ, ࡑࡢᚋᐃయ✚୍㠃

80kPa ࡟㐩ࡍࡿࡲ࡛ࡑࢀࡒࢀู㏵ヨ㦂ࢆ⾜ࡗࡓ.

ࡏࢇ᩿ヨ㦂ࢆ⾜࠺ࡇ࡜࡛, ࡏࢇ᩿㐣⛬࡛ྵỈẚࡀኚಖỈᛶヨ㦂࡛ࢧࢡࢩࣙࣥࢆไᚚࡋࡓ୙㣬࿴ᅵ࡟ᑐ໬ࡋ࡞࠸ࡏࢇ᩿ᙉᗘࢆ⟬ฟࡋࡓ. ࡇࡇ࡛, ಖỈᛶヨࡋ࡚, ᶆ‽ⓗ࡛᤼Ỉྍ⬟࡞୍㠃ࡏࢇ᩿ヨ㦂⿦⨨ࢆ⏝㦂ᚋ࠿ࡽ୍㠃ࡏࢇ᩿ヨ㦂⿦⨨࡬౪ヨయࢆタ⨨ࡍࡿ㛫࠸࡚ᐃయ✚୍㠃ࡏࢇ᩿ヨ㦂ࢆ⾜ࡗࡓ. ᐃయ✚ヨ㦂ࡢ࡟ࢧࢡࢩࣙࣥ࡜ྵỈẚࡀಖᣢࡉࢀࡿ࠿ࢆ☜ㄆࡋࡓ.

฼Ⅼ࡜ࡋ࡚ࡣ, ಖỈᛶヨ㦂࡛ࢧࢡࢩࣙࣥࢆไᚚࡋ࡚,ࡲࡓ, ヨ㦂⿦⨨㛫ࡢࢧ࢖ࢬࡢㄪᩚࡣヨ㦂ࡀᐜ᫆࡞ࣂᐃయ✚᮲௳࡛ྵỈẚࡀኚ໬ࡋ࡞࠸≧ែ࡛ヨ㦂ࢆ⾜࠺ࣝࢧᮦࢆ౑⏝ࡋ, ࡏࢇ᩿ᛂຊࡸᅽᐦ㐣⛬࡟࠾ࡅࡿᛂ࡜, ࢧࢡࢩࣙࣥ࡜ྵỈẚࡢ㛵ಀࢆ⾲ࡍỈศ≉ᛶ᭤⥺ຊศᢸࡢᙳ㡪ࢆホ౯ࡋࡓ. ࡇࢀࢆά⏝ࡋ࡚, ึᮇࢧ࡜㛵㐃ࡋࡓࡏࢇ᩿ᙉᗘࢆホ౯࡛ࡁࡿࡇ࡜ࡀᣲࡆࡽࢀࢡࢩࣙࣥࡸ᤼Ỉ㐣⛬࡜྾Ỉ㐣⛬ࡢ㐪࠸ࡀࡏࢇ᩿ᙉᗘ

ࡿ. ࡑࢀࡒࢀᅽᐦࡀ᏶஢ࡍࡿ 1 ᫬㛫ࡢ㛫 200, 100kPa࡟୚࠼ࡿᙳ㡪ࢆ, Ỉศ≉ᛶ࡜㛵㐃௜ࡅ࡚ホ౯ࡋࡓ.

ࡢᅽᐦᛂຊࢆ㍕Ⲵࡋ, ᐃయ✚᮲௳࡛ࡏࢇ᩿㏿ᗘ
0.2mm/min ࡢࡶ࡜, ࡏࢇ᩿ኚ఩ࡀ 7mm ࡟㐩ࡍࡿࡲ㸰㸬ヨ㦂ࢩࢫࢸ࣒ࡢᴫせ࡛ヨ㦂ࢆ⾜ࡗࡓ.
ࡇࡇ࡛, ಖỈᛶヨ㦂ᚋ࡜୍㠃ࡏࢇ᩿ヨ㦂⿦⨨࡬ࡢタ⨨᫬ࡢࢧࢡࢩࣙࣥ࡜ྵỈẚࡀྠ➼࡛࠶ࡿ࠿ࢆ☜ㄆօ 㸯ࢫࢸࢵࣉࢩࢫࢸ࣒ࡢᴫせᮏ◊✲࡛ࡣ, 㐃⥆ຍᅽᘧಖỈᛶヨ㦂6), 7)࡜ᐃయ✚୍㠃ࡏࢇ᩿ヨ㦂ࢆ㐃⥆ࡋ࡚⾜࠺ࡇ࡜ࡀ᪂つᛶࡢ୍ࡘ࡛࠶ࡾ, ࡇࡢ୍㐃ࡢヨ㦂ࡢࢩࢫࢸ࣒ࢆ 1 ࢫࢸࢵࣉࢩ㉁㔞㏻㐣ⓒศ⋡(%)ࢫࢸ࣒࡜⛠ࡍࡿ. 1 ࢫࢸࢵࣉࢩࢫࢸ࣒࡛ࡣ, Ỉศ≉ᛶ
100
90
80
70
6050403020
1000.0001
0.001
0.01
0.1
1
⢏ᚄ(mm)
ᅗ̾1㜿⸽㯮ࡰࡃࡢ⢏ᚄຍ✚᭤⥺✵Ẽᅽ࢔ࢡࣜࣝ〇ࡢ࣮ࣔࣝࢻ࣐࢖ࢡࣟ
ࢸࣥࢩ࣓࣮࢜ࢱ࣮ࢭ࣑ࣛࢵࢡᯈ

ࢧࣥࣉࣝ
D = H =5 cm

52.5䟛
Ỉᅽࢭࣥࢧ࣮᤼Ỉ
ᅗ̾2― 26 ―ᅽຊࢭࣥࢧ࣮

㐃⥆ຍᅽᘧಖỈᛶヨ㦂⿦⨨ࢸࣥࢩ࣓࣓࢜࢜
ࡢ✰࣮ࢱࡢ✰

2䟛ಖỈᛶヨ㦂ᚋ
ࡏࢇ᩿ୖ⟽
ࡢ౪ヨయ
5䟛

6䟛
ࡏ
ࡏࢇ᩿ୗ⟽
ࣂࣝࢧᮦ㕲〇ࡢࣉ࣮ࣞࢺ㸦ཌࡉ0.4mm㸧

5䟛5䟛
ᅗ̾3 ୍㠃ࡏࢇ᩿ヨ㦂࡬ࡢ⛣ືᅗࡍࡿࡓࡵ࡟, 25Υ๓ᚋࡢᐊࡢୗ࡛ᮏヨ㦂࡜ࡣู࡟ಖỈᛶヨ㦂࠿ࡽ୍㠃ࡏࢇ᩿ヨ㦂࡬ࡢ⛣ື࡟ᚲせ࡞⣙
1 ᫬㛫ࡢࢧࢡࢩࣙࣥࡢኚ໬ࢆ☜ㄆࡋ, ಖỈᛶヨ㦂┤ᚋ࡜ࡑࡢ 1 ᫬㛫ᚋࡢྵỈẚࡢኚ໬ࡶ☜ㄆࡋࡓ.
ࡲࡓ, ౪ヨయࡢࢧ࢖ࢬࡀಖỈᛶヨ㦂࡛ࡣ┤ᚄ 5cm
࡟ᑐࡋ࡚, ୍㠃ࡏࢇ᩿ヨ㦂࡛ࡣ┤ᚄ 6cm ࡜㐪࠸ࡀ࠶
ࡿ. ࡑࡇ࡛ᅗ̾3 ࡢࡼ࠺࡟, ಖỈᛶヨ㦂ᚋࡢ౪ヨయࡢ㧗ࡉࢆ 2cm ࡟࢝ࢵࢺࡋ࡚, ஝⇱ࡋࡓࣂࣝࢧᮦࢆ୍㠃ࡏࢇ᩿ヨ㦂ࡢࡏࢇ᩿⟽࡟タ⨨ࡋ࡚┤ᚄ 6cm ┦ᙜ࡟ᛂຊศᢸࡢࣇ࣮ࣟࢳ࣮ࣕࢺ஌ࡌ࡚, ᛂຊศᢸࢆ㐺⏝ࡋࡓᅽᐦᛂຊࢆ⟬ฟࡋࡓ.
ᛂຊศᢸࡢ᭷ຠᛶࢆ☜ㄆࡍࡿࡓࡵ࡟, ᪤ ࡢ◊✲ 8)࡟࠾ࡅࡿࢧࢡࢩࣙࣥ 30kPa ┦ᙜࡢྵỈẚ 82.06%ࡢ
≧ែ࡛ࠊ㐃⥆ຍᅽᘧಖỈᛶヨ㦂࡜ྠᵝࡢ┤ᚄ 5cm,ㄪᩚࡋ, ୍㠃ࡏࢇ᩿ヨ㦂ࢆ⾜ࡗࡓ. ࡇࡇ࡛, ࢸࣥࢩ࣓࣮࢜ࢱࡢ✰ࡢ㒊ศࡣ౪ヨయࡢ࢝ࢵࢺࡢ㝿࡟ษࡾྲྀࡽࢀ, ࡑࢀ௨እࡢ㒊ศࢆ୍㠃ࡏࢇ᩿ヨ㦂࡟౑⏝ࡍࡿࡓࡵ, ୍㠃ࡏࢇ᩿ヨ㦂࡟࠾࠸࡚✰ࡢᙳ㡪ࡣཷࡅ࡞࠸.
ࡲࡓ, ࣂࣝࢧᮦࡣ᭱ࡶྵỈẚࡀ㧗࠸㣬࿴ᅵ࡟࠾࠸࡚
ࡶ඲యࡢ⣙ 2%ࡋ࠿Ỉศࢆ྾཰ࡋ࡞࠸. ཌࡉ 0.4mm
ࡢ㕲〇ࡢࣉ࣮ࣞࢺࢆධࢀ࡚ࣂࣝࢧᮦྠኈࡢᦶ᧿ࢆ㜵ࡄࡇ࡜࡛, ࡏࢇ᩿ᛂຊ࡬ࡢᙳ㡪ࢆᑠࡉࡃࡍࡿࡼ࠺࡟
ࡋࡓ. ୍㠃ࡏࢇ᩿ヨ㦂࡛ࡣࢧࢡࢩࣙࣥࢆィᅗ̾4ࡍࡿࡇ

࡜ࡀ࡛ࡁ࡞࠸ࡀ, ಖỈᛶヨ㦂⤊஢ᚋࡢึᮇࢧࢡࢩࣙ
ࣥࡀྠ୍࡛࠶ࢀࡤ, ᮲௳ࢆ⤫୍ࡋ࡚ࡏࢇ᩿ᙉᗘࢆẚ㍑ࡍࡿࡇ࡜ࡀ࡛ࡁࡿ࡜⪃࠼ࡿ. ࡇࡇ࡛, ᅽᐦ㐣⛬࡟࠾ࡅࡿࣂࣝࢧᮦࡢᙳ㡪ࢆ⪃៖ࡍࡿࡓࡵ࡟, ࣂࣝࢧᮦࡢᙎᛶ㡿ᇦෆ࡛ࣂࣝࢧᮦ࡜ヨᩱࡢᛂຊࡢ㔜ࡡྜࢃࡏࡀ᭷ຠ࡛࠶ࡿ࡜௬ᐃࡍࡿ. ࡑࢀࡒࢀࡢᅽᐦᛂຊ-ᆶ┤ኚ఩㛵ಀ࠿ࡽᅗ̾4 ࡢࣇ࣮ࣟࢳ࣮ࣕࢺࡢࡼ࠺࡟, ᅽᐦ㐣⛬࡟ࡼࡿᛂຊศᢸࢆ⪃៖ࡋࡓࡏࢇ᩿ᙉᗘࢆ⟬ᐃ
ࡋࡓ. ලయⓗ࡟ࡣ, タᐃࡋࡓᅽᐦᛂຊࢆࣂࣝࢧᮦ࡟
࠿ࡅ࡚࢟ࣕࣜࣈ࣮ࣞࢩࣙࣥࢆ⾜࠺. ࡑࡢᚋ, ࣂࣝࢧᮦ࡛ㄪᩚࡋࡓಖỈᛶヨ㦂ᚋࡢヨᩱ࡟ᑐࡋ࡚ྠࡌᅽᐦ
ᛂຊ୍࡛㠃ࡏࢇ᩿ヨ㦂ࢆ⾜࠺. ḟ࡟, ࢟ࣕࣜࣈ࣮ࣞࢩࣙࣥࡢ⤖ᯝ࠿ࡽࣂࣝࢧᮦ࡛ㄪᩚࡋࡓヨᩱࡢ᭱⤊ᅽᐦኚ఩࡟࠾ࡅࡿࣂࣝࢧᮦࡢࡳࡢᅽᐦᛂຊߪ஻ ࢆ⟬ฟࡍࡿ. ࡇࢀ࡟ࡼࡾ, ࣂࣝࢧᮦ࡛ㄪᩚࡋࡓヨᩱ࡟࠿࠿ࡿᅽᐦᛂຊߪ் ࢆồࡵࡿ࡜, ᮍ▱ࡢ್࡛࠶ࡿヨᩱࡢࡳࡢᅽᐦᛂຊߪௌ ࢆồࡵࡿࡇ࡜ࡀ࡛ࡁࡿ. ࡑࡇ࠿ࡽᚓࡽࢀࡿኚ໬⋡ࢆࣆ࣮ࢡࡏࢇ᩿ᛂຊ࡟࠾ࡅࡿᅽᐦᛂຊ࡟㏻ᖖࡢ୍㠃ࡏࢇ᩿ヨ㦂࡜ྠᵝࡢ┤ᚄ 6cm, 㧗ࡉ 2cmࡢ෇ᰕᆺ࡟ࡑࢀࡒࢀ⥾ࡵᅛࡵ࡚ᐃయ✚୍㠃ࡏࢇ᩿ヨ㦂ࢆ⾜ࡗࡓ.
ֆ 㸯ࢫࢸࢵࣉࢩࢫࢸ࣒࡟࠾ࡅࡿỈศ≉ᛶࡢಖᣢ㐃⥆ຍᅽᘧಖỈᛶヨ㦂⤊஢࠿ࡽ✵Ẽᅽࡢ㍕Ⲵࢆ୰
Ṇࡋ࡚౪ヨయࢆᐊ, ኱Ẽᅽࡢୗ࡟᭚ࡋ, ಖỈᛶヨ㦂ࡢࢸࣥࢩ࣓࣮࢜ࢱࡸ㟁Ꮚኳ⛗࡟ࡼࡿࢹ࣮ࢱࢆ⏝࠸࡚⣙ 1 ᫬㛫ᚋࡢࢧࢡࢩࣙࣥ࡜ྵỈẚࢆィࡋ, ᫬㛫࡜ࢧࢡࢩࣙࣥ, ྵỈẚࡢ㛵ಀ࡜ࡋ࡚ᩚ⌮ࡋࡓࡶࡢࢆ
ᅗ̾5 ࡟♧ࡍ. ᅗ̾5 ࡼࡾ, ⣙ 1 ᫬㛫࡛ࢧࢡࢩࣙࣥࡣ
0.3kPa, ྵỈẚࡣ 1.3%࡜࡯࡜ࢇ࡝ኚ໬ࡋ࡞࠸ࡓࡵ,ึᮇࡢࢧࢡࢩࣙࣥ, ྵỈẚࢆᴫࡡಖᣢࡋࡓ≧ែ୍࡛㠃ࡏࢇ᩿ヨ㦂ࢆ⾜࠺ࡇ࡜ࡀ࡛ࡁࡿ࡜☜ㄆ࡛ࡁࡓ.
և ࣂࣝࢧᮦ࡟ࡼࡿᅽᐦᛂຊ࣭ࡏࢇ᩿ᛂຊ࡬ࡢᙳ㡪⮬↛≧ែࡢヨᩱ࡟ᑐࡋ࡚ࣂࣝࢧᮦࡢ᭷↓࡛ᐃయ✚୍㠃ࡏࢇ᩿ヨ㦂ࢆ⾜ࡗࡓ⤖ᯝࢆᅗ̾6 ࡟♧ࡍ. ᅗ̾6 ࡼࡾ, ࣂࣝࢧᮦ࡞ࡋࡢヨᩱࡢࡳࡢࣆ࣮ࢡࡏࢇ᩿ᛂຊࡣ
34.3kPa, ࣂࣝࢧᮦ࡛ㄪᩚࡋࡓヨᩱࡢࣆ࣮ࢡࡏࢇ᩿ᛂ
ຊࡣ 36.4kPa ࡜࡞ࡗࡓ. ࡼࡗ࡚, ࡏࢇ᩿㐣⛬࡟࠾࠸࡚ࡣࣂࣝࢧᮦࡢ᭷↓࡛ࡏࢇ᩿ኚ఩-ࡏࢇ᩿ᛂຊ㛵ಀࡢᣲືࡸࣆ࣮ࢡࡏࢇ᩿ᛂຊ࡟኱ࡁ࡞㐪࠸ࡀ࡞࠸ࡓࡵ,ࣂࣝࢧᮦ࡛౪ヨయࡢࢧ࢖ࢬࡢ㐪࠸ࢆㄪᩚࡋࡓ᫬ࡢᙳ㡪ࡀ↓ど࡛ࡁࡿ࡜☜ㄆ࡛ࡁࡓ. ୍᪉࡛, ᅽᐦ㐣⛬࡟࠾࠸࡚ࡣᆶ┤ኚ఩࡟ࡼࡿᙳ㡪ࡀ↓ど࡛ࡁ࡞࠸࡜⪃࠼
ࡽࢀࡿ. ࡑࡇ࡛, ࣂࣝࢧᮦࡢࡳ࡜ࣂࣝࢧᮦ࡛ㄪᩚࡋ― 27 ―ࡓヨᩱ࡟ᑐࡋ࡚ࡑࢀࡒࢀᅽᐦᛂຊ 200, 100, 50kPa ࡛օ Ỉศ≉ᛶ᭤⥺ᅽᐦࡋ, ࣂࣝࢧᮦ࡛ㄪᩚࡋࡓヨᩱࡢ᭱⤊ᆶ┤ኚ఩࡟ ┠ᶆࢧࢡࢩࣙࣥࡀ᤼Ỉ㐣⛬ 30, 80kPa, ྾Ỉ㐣⛬࠾ࡅࡿࣂࣝࢧᮦࡢࡳࡢᅽᐦᛂຊ࠿ࡽ, ヨᩱࡢࡳ࡟࠿

80kPa ࡟㐩ࡍࡿࡲ࡛㐃⥆ຍᅽᘧಖỈᛶヨ㦂ࢆ⾜ࡗࡓ࠿ࡿᅽᐦᛂຊࢆ⟬ฟࡋࡓ. ࡑࡢᚋ, ᐇ㝿ࡢヨᩱࡢࡳ⤖ᯝ࠿ࡽᚓࡽࢀࡓỈศ≉ᛶ᭤⥺ࢆᅗ̾8 ࡟♧ࡍ. ซ౛㸦ձ㸧, ࣂࣝࢧᮦ࡛ㄪᩚࡋࡓヨᩱ㸦ղ㸧, ղ࡟࠾࠸࡚ࡣࢧࢡࢩࣙࣥࡢ≧ែ࡜ಖỈᛶヨ㦂ᚋ࡟⾜ࡗࡓᐃయ✚ࣂࣝࢧᮦࡢ࢟ࣕࣜࣈ࣮ࣞࢩࣙࣥࢆࡑࢀࡒࢀࡢᅽᐦᛂ୍㠃ࡏࢇ᩿ヨ㦂ࡢᅽᐦᛂຊࢆ⾲ࡋ࡚࠸ࡿ.

ຊ࡟ᑐᛂࡋࡓᛂຊศᢸ࡟ࡼࡿಟṇ⤖ᯝ㸦ճ㸧ࢆẚ㍑

 ࡇࢀࡽࡣࡍ࡭࡚㣬࿴≧ែࢆึᮇ≧ែ࡜ࡋ࡚ヨ㦂ࢆࡋ࡚ᩚ⌮ࡋࡓࡶࡢࢆᅗ̾7 ࡟♧ࡍ. ձ࡛ࡣ⢓╔ຊࡀ⾜ࡗࡓ. ࡑࡢ⤖ᯝ, 㐃⥆ຍᅽᘧࢆ⧞ࡾ㏉ࡋ⾜ࡗ࡚ࡶ25.8kPa, ෆ㒊ᦶ᧿ゅࡀ 26.8r࡛࠶ࡿࡢ࡟ᑐࡋ, ղ࡛Ỉศ≉ᛶ᭤⥺ࡣ࡯࡜ࢇ࡝୍⮴ࡋࡓ. ࡲࡓ྾Ỉ㐣⛬ࡣ⢓╔ຊࡀ 25.6kPa, ෆ㒊ᦶ᧿ゅࡀ 22.1r࡛, ճ࡛ࡣ80kPa ࡢ᭱⤊≧ែ࡟╔┠ࡍࡿ࡜, ࢧࢡࢩࣙࣥࡢ኱ࡁ⢓╔ຊࡀ 19.3kPa, ෆ㒊ᦶ᧿ゅࡀ 28.4r࡛࠶ࡿ. ձ࡜ࡉࡀ࡯ࡰྠࡌ࡛ࡶ, ᤼Ỉ㐣⛬࡜྾Ỉ㐣⛬࡛య✚ྵỈղࢆẚ㍑ࡍࡿ࡜, ㄗᕪࡣ⢓╔ຊࡀ-0.8%, ෆ㒊ᦶ᧿ゅ⋡ࡢ್ࡀ␗࡞ࡿ࡜࠸࠺Ỉศ≉ᛶ᭤⥺ࡢࣄࢫࢸࣜࢩࢫ

ࡀ-17.5%࡛࠶ࡿ. ୍᪉, ձ࡜ճࢆẚ㍑ࡍࡿ࡜, ㄗᕪࢆ☜ㄆࡍࡿࡇ࡜ࡀ࡛ࡁࡓ.

ࡣ⢓╔ຊࡀ-25.2%, ෆ㒊ᦶ᧿ゅࡀ 6.0%࡛࠶ࡾ, ղ࡜ẚ㍑ࡋ࡚⢓╔ຊࡢㄗᕪࡣ኱ࡁࡃ࡞ࡗࡓࡶࡢࡢ, ෆ㒊ֆ ᐃయ✚୍㠃ࡏࢇ᩿ヨ㦂ࡢ⤖ᯝᦶ᧿ゅࡢㄗᕪࡀᑠࡉࡃ࡞ࡗࡓ. ࡇࡢࡇ࡜࠿ࡽ, ᛂຊ 㐃⥆ຍᅽᘧಖỈᛶヨ㦂࡛┠ᶆࡢࢧࢡࢩࣙࣥ࡟㐩ࡋศᢸࡢ⿵ṇࢆ⾜࠺ࡇ࡜࡛, ᐇ㝿ࡢヨᩱ࡛ᚓࡽࢀࡿࣔࡓᚋ࡟ᐃయ✚୍㠃ࡏࢇ᩿ヨ㦂ࢆ⾜ࡗࡓ. ࡑࢀࡒࢀᅽ࣮࣭ࣝࢡ࣮ࣟࣥࡢ◚ቯໟ⤡⥺࡟ࡼࡾ㏆࡙ࡃഴྥࡀㄞ

ᐦᛂຊࡈ࡜࡟ࣂࣝࢧᮦࡢ࢟ࣕࣜࣈ࣮ࣞࢩࣙࣥࢆ⾜࠸,ࡳྲྀࢀ, ࡇࡇ࡛♧ࡍᛂຊศᢸࡢ⿵ṇࢆ⾜࠺ࡇ࡜ࡢ㔜ࡑࡇ࠿ࡽ㐃⥆ࡋ࡚ࣂࣝࢧᮦ࡛ㄪᩚࡋࡓヨᩱࡢ୍㠃ࡏせᛶࡀ☜ㄆࡉࢀࡿ.

ࢇ᩿ヨ㦂ࢆ⾜࠺ࡇ࡜࡛, ᛂຊศᢸࢆ⪃៖ࡋࡓ⤖ᯝ࠿ࡽ⢓╔ຊ࡜ෆ㒊ᦶ᧿ゅࢆ⟬ฟࡋࡓ. ࡲࡓ, ࡇࢀࡽࢆ㸱㸬ヨ㦂⤖ᯝ᤼Ỉ㐣⛬࡟࠾ࡅࡿࢧࢡࢩࣙࣥࡢ್, ᤼Ỉ㐣⛬࡜྾Ỉ㐣⛬ࡢ㐪࠸࡛ẚ㍑ࡋࡓ.

ྵỈẚࢧࢡࢩࣙࣥ4.3kPaࠊྵỈẚ106.9%

15115ࢧࢡࢩࣙࣥ4.6kPaࠊྵỈẚ105.6%

10110

5105

0100
0204060᫬㛫㸦ศ㸧80ࡏࢇ᩿ᛂຊ(kPa)ࢧࢡࢩࣙࣥ ึᮇࢧࢡࢩࣙࣥࡀ᤼Ỉ㐣⛬ 30, 80kPa ࡢࡏࢇ᩿ኚ50ࣂࣝࢧᮦ࠶ࡾ
ࣂࣝࢧᮦ࡞ࡋ
40120ྵỈẚ(%)

ࢧࢡࢩࣙࣥ(kPa)20024ࡏࢇ᩿ኚ఩(mm)ᶅc=25.8kPa, =26.8˅ᶆc=25.6kPa, =22.1˅

050

100150ᅽᐦᛂຊ(kPa)

8

0.8

0.6

ഋਭ30kPa(200kPa)
ഋਭ30kPa(100kPa)
ഋਭ80kPa(200kPa)
ഋਭ80kPa(100kPa)‫ٷ‬ਭ80kPa(200kPa)‫ٷ‬ਭ80kPa(100kPa)

0.4

0.2

ᶇc=19.3kPa, =28.4˅

061.0య✚ྵỈ⋡ (θ)ࡏࢇ᩿ᛂຊ(kPa)ࡏࢇ᩿ୖ⟽ᅗ̾6 ࣂࣝࢧᮦࡢ᭷↓࡟ࡼࡿࡏࢇ᩿ᛂຊࡢẚ㍑

10050

ࣂࣝࢧᮦ10100ヨᩱࡢࡳ㸦ձ㸧ࣂࣝࢧᮦ㸩ヨᩱ㸦ղ㸧ᛂຊศᢸ࡟ࡼࡿಟṇ㸦ճ㸧150200

ᅗ̾5 ࢧࢡࢩࣙࣥ࡜ྵỈẚࡢ᫬㛫ኚ໬

200

30200

0.0

250

0.1

ᅗ̾7 ᅽᐦᛂຊ࡟ᑐᛂࡋࡓᛂຊศᢸ

110ࢧࢡࢩࣙࣥ (kPa)ᅗ̾8 㜿⸽㯮ࡰࡃࡢỈศ≉ᛶ᭤⥺― 28 ―

100

఩-ࡏࢇ᩿ᛂຊ㛵ಀࢆᅽᐦᛂຊ 200, 100kPa ࡢ᮲௳࡛♧ࡉࢀ࡚࠸ࡿ. ࡲࡓᅗ̾12 ࡼࡾ, ⢓╔ຊࡣ྾Ỉ㐣⛬ᩚ⌮ࡋࡓࡶࡢࢆᅗ̾9, ᅽᐦᛂຊ-ࡏࢇ᩿ᛂຊ㛵ಀࢆࡢ࡯࠺ࡀᑠࡉࡃ, ෆ㒊ᦶ᧿ゅࡣ኱ࡁࡃኚ໬ࡋ࡞࠸.

ᅗ̾10 ࡟♧ࡍ. ᤼Ỉ㐣⛬ 30kPa ࡜ 80kPa ࡟࠾࠸࡚, ྛ ௨ୖࡼࡾ, 㐃⥆ຍᅽᘧಖỈᛶヨ㦂࡜ᐃయ✚୍㠃ࡏᅽᐦᛂຊ࡛ࡢࣆ࣮ࢡࡏࢇ᩿ᛂຊ࡜ࡑࡢࡏࢇ᩿ኚ఩ࡣ

ࢇ᩿ヨ㦂ࢆ⤌ࡳྜࢃࡏࡓ 1 ࢫࢸࢵࣉࢩࢫࢸ࣒ࢆ㐺⏝ᅗ̾9 ࡢ್࡜࡞ࡿ. ࡼࡗ࡚, ⢓╔ຊ࡜ෆ㒊ᦶ᧿ゅࡣࡑࡍࡿࡇ࡜࡛, Ỉศ≉ᛶ᭤⥺࡜㛵㐃௜ࡅࡓࡏࢇ᩿ᙉᗘ

ࢀࡒࢀᅗ̾10 ࡢձ, ղࡢࡼ࠺࡟࡞ࡿ. ᤼Ỉ㐣⛬ 30kPa

ࡸࡑࡢࣃ࣓࣮ࣛࢱ࡛࠶ࡿ⢓╔ຊ࡜ෆ㒊ᦶ᧿ゅࢆ⟬ฟ࡜ 80kPa ࡢ⤖ᯝࢆẚ㍑ࡍࡿ࡜, ᅗ̾9 ࡼࡾ, ྠࡌᅽᐦࡋࡓ. ࡇࢀ࡟㛵ࡋ࡚ᛂຊศᢸࢆ⪃៖ࡋ, ᤼Ỉ㐣⛬࡟ᛂຊ࡟࠾࠸࡚ࢧࢡࢩࣙࣥࡀ኱ࡁ࠸࡯࡝, ᡤᐃࡢࡏࢇ࠾ࡅࡿࢧࢡࢩࣙࣥࡢ್, ᤼Ỉ㐣⛬࡜྾Ỉ㐣⛬ࡢ㐪࠸᩿ኚ఩࡟ᑐࡍࡿࡏࢇ᩿ᛂຊࡣ኱ࡁࡃ࡞ࡿഴྥ࡟࠶ࡿ

࡛ẚ㍑ࡍࡿࡇ࡜࡛, ࡏࢇ᩿ᙉᗘࡣᅗ̾9, 10 ࡼࡾࢧࢡࡇ࡜ࡀ♧ࡉࢀ࡚࠸ࡿ. ࡲࡓᅗ̾10 ࡼࡾ, ࢧࢡࢩࣙࣥࢩࣙࣥࡢᙳ㡪ࢆཷࡅ, ᅗ̾11, 12 ࡼࡾỈศ≉ᛶ᭤⥺࡜ࡀ኱ࡁ࠸࡯࡝⢓╔ຊࡣቑຍࡋ, ෆ㒊ᦶ᧿ゅࡣ኱ࡁࡃྠᵝ࡟ࣄࢫࢸࣜࢩࢫࡀᏑᅾࡍࡿࡇ࡜ࢆ♧ࡋࡓ. ࡇࡇኚ໬ࡋ࡞࠸.

࡛, ࢧࢡࢩࣙࣥࡢ≧ែẖ࡟⢓╔ຊ࡜ෆ㒊ᦶ᧿ゅࢆ᪤ ึᮇࢧࢡࢩࣙࣥࡀ᤼Ỉ㐣⛬ 80kPa, ྾Ỉ㐣⛬ 80kPa ࡢ◊✲ 8) ࡢ㣬࿴ᅵࡢ⤖ᯝ࡜ẚ㍑ࡋࡓࡶࡢࢆ, ࡑࢀࡢ ࡏ ࢇ ᩿ ኚ ఩ - ࡏ ࢇ ᩿ ᛂ ຊ 㛵 ಀ ࢆ ᅽ ᐦ ᛂ ຊ 200,

ࡒࢀᅗ̾13, 14 ࡟♧ࡍ. ᅗ̾13 ࡼࡾ, ࢧࢡࢩࣙࣥ࡜⢓100kPa ࡢ᮲௳࡛ᩚ⌮ࡋࡓࡶࡢࢆᅗ̾11, ᅽᐦᛂຊ-ࡏ╔ຊࡢ㛵ಀ࡟╔┠ࡍࡿ࡜, ࡝ࡢࢧࢡࢩࣙࣥ࡟࠾࠸࡚ࢇ᩿ᛂຊ㛵ಀࢆᅗ̾12 ࡟♧ࡍ. ྾Ỉ㐣⛬ 80kPa ࡟࠾ࡶ⢓╔ຊࡣ㣬࿴ᅵࡼࡾ኱ࡁ࠸. ࡲࡓᅗ̾14 ࡛ࡣ, ࡑ࠸࡚, ྛᅽᐦᛂຊ࡛ࡢࣆ࣮ࢡࡏࢇ᩿ᛂຊ࡜ࡑࡢࡏࢇࢀࡒࢀࡢෆ㒊ᦶ᧿ゅࢆᅗ♧ࡋ, 㣬࿴ᅵࢆྵࡵࡓෆ㒊᩿ኚ఩ࡣᅗ̾11 ࡢ್࡜࡞ࡿ. ࡼࡗ࡚, ⢓╔ຊ࡜ෆ㒊

ᦶ᧿ゅࡢᖹᆒ್ࢆ඲య, ᤼Ỉ㐣⛬ࡢࡳ࡛⟬ฟࡋࡓ.

ᦶ᧿ゅࡣᅗ̾12 ࡢճࡢࡼ࠺࡟࡞ࡿ. ᤼Ỉ㐣⛬ 80kPa

㣬࿴ᅵ࡜඲యࡢᖹᆒࡢㄗᕪࡣ 2.6%࡛࠶ࡿࡢ࡟ᑐࡋ,࡜྾Ỉ㐣⛬ 80kPa ࡢ⤖ᯝࢆẚ㍑ࡍࡿ࡜, ᅗ̾11 ࡼࡾ,㣬࿴ᅵ࡜᤼Ỉ㐣⛬ࡢࡳࡢᖹᆒࡢㄗᕪࡣ-0.2%࡜࡯࡜

ྠࡌᅽᐦᛂຊ࡟࠾࠸࡚ࢧࢡࢩࣙࣥࡢ್ࡀྠࡌ࡛ࡶ,ࢇ࡝Ꮡᅾࡏࡎ, ෆ㒊ᦶ᧿ゅࡣᴫࡡᩚྜࡋࡓ. ࡼࡗ࡚,᤼Ỉ㐣⛬ࡼࡾࡶ྾Ỉ㐣⛬ࡢ࡯࠺ࡀᡤᐃࡢࡏࢇ᩿ኚ఩ᛂຊศᢸࢆ⪃៖ࡋࡓෆ㒊ᦶ᧿ゅࡣ, ᤼Ỉ㐣⛬࡜྾Ỉ࡟ᑐࡍࡿࡏࢇ᩿ᛂຊࡣᑠࡉࡃ࡞ࡿഴྥ࡟࠶ࡿࡇ࡜ࡀ㐣⛬ࢆศࡅࡿ࡜ࡼࡾṇ☜࡟ホ౯ࡍࡿࡇ࡜ࡀ࡛ࡁࡿ࡜

ഋਭ30kPa(200kPa)
ഋਭ30kPa(100kPa)
ഋਭ80kPa(200kPa)
ഋਭ80kPa(100kPa)

15086.2kPa,6.58mm

100
50

62.0kPa,1.89mm

200132.2kPa,6.61mm

ࡏࢇ᩿ᛂຊ(kPa)ࡏࢇ᩿ᛂຊ(kPa)200

82.3kPa,5.91mm

ղ᤼Ỉ80kPa

1500246ࡏࢇ᩿ኚ఩(mm)100ᶅc=18.1kPa,508c=7.7kPa,=27.6˅

0ᅗ̾9 ᤼Ỉ 30, 80kPa ࡢࡏࢇ᩿ኚ఩-ࡏࢇ᩿ᛂຊ

ഋਭ80kPa(200kPa)
ഋਭ80kPa(100kPa)‫ٷ‬ਭ80kPa(200kPa)‫ٷ‬ਭ80kPa(100kPa)

150200132.2kPa,6.61mm10050

101.6kPa,5.38mm

00266.7kPa, 82.3kPa,5.14mm 5.91mm

46ࡏࢇ᩿ኚ఩(mm)50=26.7˅

100 150 200
ᅽᐦᛂຊ(kPa)

250300ᅗ̾10 ᤼Ỉ 30, 80kPa ࡢᅽᐦᛂຊ-ࡏࢇ᩿ᛂຊ

ࡏࢇ᩿ᛂຊ(kPa)

200=28.3˅

㣬࿴ᅵ00ࡏࢇ᩿ᛂຊ(kPa)ձ᤼Ỉ30kPa ᶆc=32.4kPa,

ղ᤼Ỉ80kPa ᶆc=32.4kPa,=28.3˅
ճ྾Ỉ80kPa

150

㣬࿴ᅵ

100
ᶇc=14.2kPa,50

c=7.7kPa,=27.6˅

080

ᅗ̾11 ᤼Ỉ࣭྾Ỉ 80kPa ࡢࡏࢇ᩿ኚ఩-ࡏࢇ᩿ᛂຊ

50

100 150 200
ᅽᐦᛂຊ(kPa)=30.6˅

250300ᅗ̾12 ᤼Ỉ࣭྾Ỉ 80kPa ࡢᅽᐦᛂຊ-ࡏࢇ᩿ᛂຊ

― 29 ―

35

๠࿪ౖᶅഋਭ30kPa
ᶆഋਭ80kPaᶇ‫ٷ‬ਭ80kPa

30ෆ㒊ᦶ᧿ゅ(˅)⢓╔ຊ(kPa)

4020100๠࿪ౖ
ᶅഋਭ30kPa
ᶆഋਭ80kPaᶇ‫ٷ‬ਭ80kPa
સର͹ฑ‫ۋ‬ഋਭ͹ฑ‫ۋ‬

33
31

2927
27.6r

25050
ࢧࢡࢩࣙࣥ(kPa)
ᅗ̾13

28.3r

1000ࢧࢡࢩࣙࣥ࡜⢓╔ຊࡢ㛵ಀ

27.5r
50
ࢧࢡࢩࣙࣥ(kPa)ᅗ̾14100ࢧࢡࢩࣙࣥ࡜ෆ㒊ᦶ᧿ゅࡢ㛵ಀࣙࣥ᮲௳ࢆ㏣ຍࡍࡿᚲせࡀ࠶ࡿ. ࡲࡓ, ௚ࡢヨᩱ࡟⪃࠼ࡽࢀࡿ.

ࡶά⏝ࡍࡿࡇ࡜ࡀ࡛ࡁࢀࡤ, 1 ࢫࢸࢵࣉࢩࢫࢸ࣒ࡸ㸲㸬⤖ㄽᛂຊศᢸࡢ⪃࠼ࢆᐇ⏝໬ࡍࡿࡇ࡜ࡀ࡛ࡁࡿ࡜⪃࠼ࡿ.

ᮏ◊✲࡛ࡣ, ⅆᒣ⅊㉁⢓ᛶᅵ࡛࠶ࡿ㜿⸽㯮ࡰࡃࢆཧ⪃ᩥ⊩ᑐ㇟࡟, ಖỈᛶヨ㦂࡛┠ᶆࡢࢧࢡࢩࣙࣥࢆணࡵタᐃ1) Ẽ㇟ᗇ, ඲ᅜ㸦࢔࣓ࢲࢫ㸧ࡢ 1 ᫬㛫㝆Ỉ㔞 50mm ௨ୖࡋ࡚Ỉศ≉ᛶ᭤⥺ࢆồࡵ, ࡑࡢᚋᐃయ✚୍㠃ࡏࢇ᩿ࡢᖺ㛫Ⓨ⏕ᅇᩘ, 2022 ᖺ 5 ᭶ 20 ᪥㜀ぴヨ㦂ࢆ⾜࠺ࡇ࡜࡛, ࡏࢇ᩿ᙉᗘࢆ 1 ࢫࢸࢵࣉ࡛⟬ฟ

https://www.data.jma.go.jp/cpdinfo/extreme/extreme_p.html

ࡋࡓ. ࡇࡇ࡛ࡣ, ᅽᐦ㐣⛬࡟࠾ࡅࡿᛂຊศᢸࢆ⪃៖2) 㸦බ♫㸧ᆅ┙ᕤᏛ఍௧࿴ 2 ᖺ 7 ᭶஑ᕞ㇦㞵ᆅ┙⅏ᐖࡋ, ึᮇࢧࢡࢩࣙࣥࡸ᤼Ỉ㐣⛬࡜྾Ỉ㐣⛬ࡢ㐪࠸ࡀㄪᰝᅋ, ௧࿴ 2 ᖺ 7 ᭶஑ᕞ㇦㞵࡟ࡼࡿᆅ┙⅏ᐖㄪᰝሗ࿌᭩,ࡏࢇ᩿ᙉᗘ࡟୚࠼ࡿᙳ㡪ࢆ, Ỉศ≉ᛶ࡜㛵㐃௜ࡅ࡚pp. 30-148, pp. 195-230, 2021.

ホ౯ࡋࡓ. ࡑࡢ⤖ᯝ, ୗグࡢࡼ࠺࡞⤖ㄽࡀᚓࡽࢀࡓ.

3) D. G. Fredlund, H. Rahardjo, Soil Mechanics for Unsaturatedօ ᐊSoils, pp. 207-248, 1993.

ࡢୗ࡛, 㐃⥆ຍᅽᘧಖỈᛶヨ㦂⤊஢࠿ࡽᐃయ✚୍㠃ࡏࢇ᩿ヨ㦂࡬⛣ືࡍࡿࡢ࡟༑ศ࡞⣙ 1 ᫬㛫4) Ᏻ⚟つஅ, ࢔ࣟ࢘࢖ࢩ࣮ ࢔ࢹࣝ, ▼⸝Ⰻᖹ, ␊ᒣṇ๎,ࡢ㛫, ࢧࢡࢩࣙࣥ࡜ྵỈẚࡀᴫࡡಖᣢࡉࢀࡿ.

ி㔝ಟ, 㐃⥆ຍᅽᆺࡢಖỈᛶヨ㦂࡜ࡑࢀࢆά࠿ࡋࡓ᤼࣭྾ֆ ࡏࢇ᩿㐣⛬࡟࠾࠸࡚ࡣࣂࣝࢧᮦ࡛౪ヨయࡢࢧ࢖Ỉ㐣⛬࡛ࡢ୙㣬࿴ⅆᒣ⅊㉁ᅵࡢᙉᗘᐃᩘࡢホ౯, ᆅ┙ᕤࢬࡢ㐪࠸ࢆㄪᩚࡋࡓ᫬ࡢᙳ㡪ࡀ↓ど࡛ࡁࡿ࡜☜ㄆ࡛Ꮫ఍ㄅ : Geotechnical Engineering Magazine Journal, Vol. 69,

ࡁࡓ. ࡲࡓ, ᅽᐦ㐣⛬࡟࠾ࡅࡿᛂຊศᢸࢆ⪃៖ࡍࡿNo. 1, pp. 17-22ࡇ࡜࡛, ◚ቯໟ⤡⥺ࢆ኱ࡁࡃᨭ㓄ࡍࡿෆ㒊ᦶ᧿ゅࢆ5) ᒣᮏ෽㞞, ୙㣬࿴ⅆᒣ⅊㉁ᅵࡢ᤼Ỉ࣭྾Ỉ㐣⛬࡟࠾ࡅࡿ㐺ṇ࡟Ỵᐃࡍࡿࡇ࡜ࡀ࡛ࡁࡓ.

Ỉศ≉ᛶ࡜ࡏࢇ᩿ᙉᗘࡢ⡆᫆ྠ᫬ィև ࢧࢡࢩࣙࣥࡢ㐪࠸࡛ࡏࢇ᩿ᙉᗘࢆẚ㍑ࡍࡿ࡜,ࡑࡢ㐺⏝, ஑ᕞ኱Ꮫ኱Ꮫ㝔ಟኈㄽᩥ, 2020.

ࢩࢫࢸ࣒ࡢ㛤Ⓨ࡜ྠࡌᅽᐦᛂຊ࡟࠾࠸࡚ࢧࢡࢩࣙࣥࡀ኱ࡁ࠸࡯࡝, ᡤ6) Alowaisy, A., Yasufuku, N., Ishikura, R., Hatakeyama, M., &ᐃࡢࡏࢇ᩿ኚ఩࡟ᑐࡍࡿࡏࢇ᩿ᛂຊࡣ኱ࡁ࠸. ࡲࡓ,Kyono, S., Novel rapid measurement system of undisturbed soilsࢧࢡࢩࣙࣥࡀ኱ࡁ࠸࡯࡝⢓╔ຊࡣቑຍࡋ, ෆ㒊ᦶ᧿

waterゅࡣ኱ࡁࡃኚ໬ࡋ࡞࠸.

pressurization method. In E3S Web of Conferences (Vol. 92, p.

ֈ ᤼Ỉ㐣⛬࡜྾Ỉ㐣⛬ࡢ㐪࠸࡛ࡏࢇ᩿ᙉᗘࢆẚ㍑07008). EDP Sciences, 2019.

ࡍࡿ࡜, ྠࡌᅽᐦᛂຊ࡟࠾࠸࡚ࢧࢡࢩࣙࣥࡢ್ࡀྠ7) Alowaisy, A., Yasufuku, N., Ishikura, R., Hatakeyama, M.,ࡌ࡛ࡶ, ᤼Ỉ㐣⛬ࡼࡾࡶ྾Ỉ㐣⛬ࡢ࡯࠺ࡀᡤᐃࡢࡏ

Kyono, S., Continuous pressurization method for a rapid deterࢇ᩿ኚ఩࡟ᑐࡍࡿࡏࢇ᩿ᛂຊࡣᑠࡉ࠸. ࡲࡓ, ᛂຊmination of the soil water characteristics curve for remolded andศᢸࢆ⪃៖ࡋࡓሙྜ࡟ࡣ⢓╔ຊࡣ྾Ỉ㐣⛬ࡢ࡯࠺ࡀundisturbed cohesionless soils. Soils and Foundations, 66(3):ᑠࡉࡃ, ෆ㒊ᦶ᧿ゅࡣ኱ࡁࡃኚ໬ࡋ࡞࠸.

634 -647, 2020.

։ ࢧࢡࢩࣙࣥ࡜ෆ㒊ᦶ᧿ゅࡢ㛵ಀ࡟╔┠ࡍࡿ࡜,8) ┦Ⰻ▱㍤, ᤼Ỉ࣭྾Ỉ㐣⛬࡟࠾ࡅࡿ୙㣬࿴ᅵࡢỈศ≉ᛶ㣬࿴ᅵࡢෆ㒊ᦶ᧿ゅ࡜ᛂຊศᢸࢆ⪃៖ࡋࡓ᤼Ỉ㐣⛬࡜ᙉᗘ≉ᛶࡢ 1 ࢫࢸࢵࣉホ౯࡟㛵ࡍࡿ◊✲, ஑ᕞ኱Ꮫ༞ᴗ࡛ࡢෆ㒊ᦶ᧿ゅࡣᴫࡡᩚྜࡋࡓ.

ㄽᩥ, 2021.

௒ᚋࡣ, ᤼Ỉ㐣⛬࡜྾Ỉ㐣⛬୧᪉࡟࠾࠸࡚ࢧࢡࢩ

― 30 ―

characteristics

curve

utilizing

thecontinuous㸦ཷ௜㸧