ㄽᩥ Ἑᕝᢏ⾡ㄽᩥ㞟,➨21ᕳ,2015ᖺ6᭶
Ἑᕝሐ㜵ࡢ㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺᩜタࡼࡿ
㛫㝽✵ẼᄇⓎࡢᢚไຠᯝ
EFFECT OF BREATHABLE-WATERPROOF GEOTEXTILE ON PREVENTION OF THE PORE-AIR BLOW IN RIVER DIKE
⚄㇂ᾈ
1࣭ሙᩗኈ
2࣭ᒣ⏣࿘స
3࣭▼⏣ṇ
4Kohji KAMIYA, Keishi OHBA, Shusaku YAMADA and Masatoshi ISHIDA 1ṇဨ ༤ኈᕤ ᒱ㜧Ꮫᩍᤵ ᕤᏛ㒊♫ᇶ┙ᕤᏛ⛉ ࠛ501-1193 ᒱ㜧ᕷᰗᡞ1-1 2Ꮫ⏕ဨ ᒱ㜧ᏛᏛ㝔⏕ Ꮫ㝔ᕤᏛ◊✲⛉༤ኈ๓ᮇㄢ⛬ ࠛ501-1193 ᒱ㜧ᕷᰗᡞ1-1
3ṇဨ ᡂᘓタඖ ᒱ㜧ᏛᏛ㝔⏕ࠛ163-0606 ᮾி㒔᪂ᐟ༊す᪂ᐟ1-25-1 4ṇဨ ኴ㝧ᕤᴗ ᅜᅵ⎔ቃ࢚ࣥࢪࢽࣜࣥࢢ࢝ࣥࣃࢽ࣮ ࠛ154-0001 ᮾி㒔ୡ⏣㇂༊ụᑼ2-33-16
It has been pointed out that the pore-air blows off from the surface of river dike during heavy rainfall.
It is therefore important to consider the influence of the pore-air blow on the stability of the dike. Based on the laboratory water infiltration experiment in the unsaturated soil column, we found that the pore-air pressure in the soil was generated by the seepage of the water when the air permeability at near the surface was reduced by the rainfall. The pore-air blow occurred due to the larger pore-air pressure. In this paper, the effectiveness of the breathable-waterproof geotextile on prevention of the pore-air blow is experimentally examined. As a result, it is shown that the pore-air blow is prevented in while keeping the air permeability at near the surface by laying the geotextile at the ground surface.
Key Words : Breathable-waterproof geotextile, Pore-air pressure, Air permeability
㸯㸬ࡲ࠼ࡀࡁ
㣬࡞Ἑᕝሐ㜵ࡀ㞵ᾐỈࢆཷࡅࡓࡁ㸪ሐ㜵 ෆ㒊ࡢ㛫㝽✵Ẽࡀᆅ⾲㠃ࡽᄇⓎࡍࡿ⌧㇟ࡀ☜ㄆࡉࢀ࡚
࠸ࡿ㸬ࡇࡢ⌧㇟ࡣ㸪ᆅ┙ட࡞ࡢᦆയࢆ࠼㸪ᾐ㏱
ỈࡢỈࡳࡕࢆᙧᡂࡍࡿ࡞ࡍࡿࡓࡵ㸪Ἑᕝሐ㜵ࡢᏳᐃ
ࡢ୍ᅉ࡞ࡿࡇࡀ⪃࠼ࡽࢀ㸪ࡑࡢᑐ⟇ࡀᚲせ࡛࠶
ࡿ㸬ᚑ᮶ࡢ㐽Ỉࢩ࣮ࢺࡼࡿ⾲ࡢࡾ㠃⿕そᕤἲᑐẚࡋ
࡚㸪㛫㝽✵ẼࡢᄇⓎ⌧㇟ࡶᑐฎࡍࡿࡓࡵ㸪㝆㞵ࡸἙᕝ ỈࡢᾐỈࢆᢚไࡋ㛫㝽✵Ẽࡢᆅ⾲ࡽࡢฟࢆ☜ಖࡍࡿ
ࡓࡵࡢ㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺࡢ㐺⏝ࡀ᳨ウࡉࢀ࡚࠸ࡿ1) ,2)㸬 ࡋࡋ࡞ࡀࡽ㸪✵ẼᄇⓎᑐ⟇ࢆせࡍࡿሐ㜵ࡢᅵ㉁➼ࡢㅖ ᮲௳ࡸ㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺࡢせồᛶ⬟ࡣ᫂☜ࡉࢀ࡚࠸
࡞࠸⪃࠼ࡽࢀࡿ㸬➹⪅ࡽࡣ㸪㣬࡞ᶍᆺᆅ┙ࡘ࠸
࡚㸪㖄┤୍ḟඖ᪉ྥ࡛㸪ୖ㠃ࡽேᕤ㝆㞵ࢆᾐỈࡉࡏୗ
㠃ࡽἙᕝỈࢆᐃࡋࡓᾐỈࢆࡉࡏࡿ⌧ᐇ㦂ࢆᐇࡋ ࡓ3)㸬㝆㞵ࡢᾐỈࡼࡿᆅ⾲㏆ࡢ㏱Ẽᛶపୗࡀⴭࡋ࠸
ᆅ┙ἙᕝỈࡀᛴ⃭ᾐỈࡋࡓࡁ㸪㛫㝽✵Ẽࡣᆅ┙ෆ
ᑒධࡉࢀᅽຊࡀ㧗ࡲࡿࡇ㸪✵Ẽᅽຊቑకࡗ࡚ᆅ
⾲㏆࡛ࡣᄇⓎࡸடࡢ◚ቯ⌧㇟⮳ࡿࡇࢆㄆࡵࡓ㸬
ࡲࡓ㸪ࢩ࣮ࢺࡢ㏱Ẽ࣭㏱Ỉᛶࡢホ౯ࢆ⾜࠺ࡶ4)㸪
ࢩ࣮ࢺᩜタࡼࡿ✵ẼᄇⓎࡢᢚไࡢ᭷ຠᛶࢆ✲᫂ࡋࡓ5)㸬 ࡑࡋ࡚㸪✵ẼᄇⓎࢆᢚไࡍࡿࡣ㸪ࢩ࣮ࢺࡢ㏱Ẽಀᩘࢆ
10-4m/s࣮࢜ࢲ࣮௨ୖ☜ಖࡍࡿᚲせᛶ࡞ࡀ᫂ࡽ
࡞ࡗࡓ㸬ࡋࡋ࡞ࡀࡽ㸪ᐇ㝿ࡢࢩ࣮ࢺᑐ⟇ᕤࡣ㸪ࢩ࣮ࢺ ࡢຎࡸᾋࡁୖࡾ㜵Ṇࡢࡓࡵ㸪ࡑࡢୖ㠃そᅵࢆ⾜࠺
ࡇࡀከࡃ㸪➹⪅ࡽࡢ᪤ ◊✲4)࡛ࡣࢩ࣮ࢺそᅵࢆ
ࡋࡓ≧ែ࡛ࡢ㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺࡢᛶ⬟ࢆホ౯࡛ࡁ࡚࠸
࡞࠸ࡇࡀㄢ㢟ࡋ࡚ᣲࡆࡽࢀࡓ㸬༶ࡕ㸪ࢩ࣮ࢺࡀ㍕Ⲵ ࡉࢀࡓࡁࡢࡑࡢ㏱Ẽಀᩘࡢせồᛶ⬟ࡢ☜ಖࡘ࠸࡚☜
ㄆࡍࡿᚲせࡀ࠶ࡗࡓ㸬
ᮏㄽᩥ࡛ࡣ㸪㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺᕤἲࡢᐇ⏝ྥࡅ
࡚㸪㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺࡀそᅵࢆᐃࡋࡓ㍕Ⲵᅽࢆཷࡅ ࡓࡁࡑࡢ㏱Ẽ࣭㏱Ỉᛶཬࡰࡍᙳ㡪ࢆᇶ♏ᐇ㦂ࡼ
ࡾ᳨ウࡋࡓ㸬ࡲࡓ㸪㣬࡞ᶍᆺᆅ┙ࡢᆅ⾲㏆ࢩ࣮
ࢺࢆᩜタࡋࡓࡁࡢ㛫㝽✵ẼᅽⓎ⏕࣭ᄇⓎ⌧㇟ࡢᢚไຠ
ᯝࡘ࠸᳨࡚ドࡋࡓ㸬
㸰㸬㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺࡢ㏱Ẽ࣭㏱Ỉᛶࡢホ౯
㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺ
ࢩ࣮ࢺࡣ㸪ᅗ♧ࡍࡼ࠺㸪㏱Ẽᛶࢆ᭷ࡋࡓ㏱Ỉ ㄽᩥ Ἑᕝᢏ⾡ㄽᩥ㞟, ➨21ᕳ, 2015ᖺ6᭶
ᛶࡢࣇ࣒ࣝࡑࡢ୧ഃࢆಖㆤࡍࡿࡓࡵࡢ⧊ᕸࡢ୕ᒙ
ࡽ࡞ࡿ㸬┿ࡣ㸪ࢩ࣮ࢺ⾲㠃ࡢ⧊ᕸࡢ㢧ᚤ㙾┿
ࢆ♧ࡋࡓࡶࡢ࡛࠶ࡿ㸬⧊ᕸ࡛ࡣᚤ⣽࡞㛫㝽✵㛫ࡀ」㞧
ᙧᡂࡉࢀ࡚࠸ࡿ㸬ࢩ࣮ࢺࡢཌࡉࡣ L* = 0.3cm࡛࠶ࡾ㸪
࡛ᚋ㏙ࡍࡿࡼ࠺⇱≧ែࡢࢩ࣮ࢺࡢ㏱Ẽಀᩘࡣ ka = 4.7 × 10-5m/s㸪㣬≧ែࡢ㏱Ỉಀᩘࡣkw = 0࡛㏱Ỉ ᛶ࡛࠶ࡿ㸬ࡋࡓࡀࡗ࡚㸪ࡇࡢࢩ࣮ࢺࢆሐ㜵ᩜタࡋࡓሙ
ྜࡣ㸪ሐ㜵ࡢἙᕝỈ➼ࡢᾐỈᢚไࢆ༑ศᮇᚅ࡛ࡁࡿ
ࡀ㸪㏱Ẽᛶࡀప࠸ࡓࡵሐ㜵ෆ㒊ࡢ㛫㝽✵Ẽࡢฟࢆᢚ ไࡋ࡚㛫㝽✵Ẽᅽࢆቑຍࡉࡏࡿྍ⬟ᛶࡀ࠶ࡿ㸬ࡑࡢࡓࡵ㸪 ᮏ◊✲࡛ࡣ㸪ࢩ࣮ࢺ┤ᚄࡀd = 0.32mmࡢ⣽Ꮝࢆ㛤Ꮝ⋡
n* (%)(ࢩ࣮ࢺࡢ㠃✚1cm2࠶ࡓࡾࡢ⣽Ꮝࡢ㠃✚ࡢྜ)࡛ ᪂ࡓタࡅ㸪㏱Ẽᛶࢆྥୖࡉࡏࡓ㸬௨ୗ࡛ࡣ㸪ࢩ࣮ࢺࡣ㸪
㏱Ẽ࣭㏱Ỉᛶ࡛ࡣ࡞ࡃ㸪㏱Ẽ࣭㜵Ỉᛶࡋ࡚⾲⌧ࡋࡓ㸬 㛤Ꮝ⋡ࡣn* = 0.10%㸪0.16%㸪0.48%㸪0.64%㸪0.97%㸪 1.45%ࡋࡓ㸬ࡑࡋ࡚㸪ḟࡢࡼ࠺㸪㏱Ẽ࣭㜵Ỉᛶࢩ࣮
ࢺࡢ㏱Ẽ࣭㏱Ỉヨ㦂ࡼࡗ࡚㏱Ẽಀᩘka (m/s)㣬㏱Ỉ ಀᩘkw (m/s)ࢆㄪࡓ㸬
㏱Ẽヨ㦂
そᅵࢆᐃࡋ࡚ࢩ࣮ࢺୖ㠃㍕Ⲵᅽp (kN/m2)ࢆ࠼
࡞ࡀࡽ㸪㏱Ẽヨ㦂ࢆ⾜ࡗࡓ㸬ヨ㦂⨨ࡣ㸪ᅗࡑࡢᴫ せࢆ♧ࡍࡼ࠺㸪ࢩ࣮ࢺࢆタ⨨ࡍࡿヨᩱᐜჾ(ෆᚄ 100cm)㸪✵Ẽᅽຊㄪ⠇ჾ㸪✵Ẽὶ㔞ィ㸪✵Ẽᅽຊィ㸪㍕
Ⲵᶵჾ㸪Ⲵ㔜ィ㸪ኚィࡼࡗ࡚ᵓᡂࡉࢀ࡚࠸ࡿ㸬
✵Ẽࢥࣥࣉࣞࢵࢧ࣮ࡽ౪⤥ࡉࢀࡿᅽ⦰✵Ẽࢆ✵Ẽᅽ ຊㄪ⠇ჾࡼࡗ࡚ᡤᐃࡢࡁࡉࡢ✵Ẽᅽຊㄪ⠇ࡋ࡚ヨ
ᩱᐜჾ㏦Ẽࡋ㸪✵Ẽࢆࢩ࣮ࢺᑐࡋ࡚㖄┤ୖྥࡁ㏱
㐣ࡉࡏࡿ㸬ࡑࡢࡁ㸪ࢩ࣮ࢺୗ㠃ഃ࠼ࡓ✵ẼᅽຊỈ 㢌ha (cm)ࢆ✵Ẽᅽຊィࡼࡾ㸪㏱㐣ࡋࡓ✵Ẽࡢὶ㔞Qa
(cm3/s)ࢆ✵Ẽὶ㔞ィࡼࡾࡑࢀࡒࢀ ᐃࡍࡿ㸬ࡲࡓ㸪Ⲵ 㔜ィࡼࡗ࡚㍕Ⲵᅽp (kN/m2)ࢆィ ࡋ㸪ኚィࡼࡗ࡚
㍕Ⲵࡋࡓࡁࡢࢩ࣮ࢺࡢኚ㔞į (mm)ࢆィ ࡋࡓ㸬࡞࠾㸪 ࢩ࣮ࢺࡣ㸪┿♧ࡍࡼ࠺㸪ࡑࡢእ࿘ప⢓ᗘ࢚࣏
࢟ࢩᶞ⬡ࢆྵᾐࡉࡏ㸪ࢫࢸࣥࣞࢫࣜࣥࢢࢆ᥋╔ࡉࡏ㸪ࡑ
ࢀࢆ⨨タ⨨ࡋ࡚ࢩ࣮ࢺ࿘ᅖࡽࡢ₃Ẽ➼ࢆ㜵ࡂ㸪✵
Ẽࡀࢩ࣮ࢺ㖄┤᪉ྥࡢࡳ㏱㐣ࡍࡿࡼ࠺ࡋࡓ㸬௨ୗࡢ ࢩ࣮ࢺ㛵ࡍࡿヨ㦂࠾࠸࡚ࡣ㸪ࡍ࡚ྠᵝࡢฎ⌮ࢆ
ࡋࡓࢩ࣮ࢺࢆ⏝࠸ࡓ㸬ヨ㦂࡛ࡣ㸪⇱≧ែᾐỈ⬺Ẽࡋ ࡓ‵₶≧ែࡢࢩ࣮ࢺࢆ⏝࠸ࡓ㸬㍕Ⲵᅽࡣ㸪そᅵࡢ࡞࠸
ࡁࡢp = 0㸪そᅵࢆ50cmཌࡉ㸪100cmཌࡉࡢࡑࢀࡒࢀ࡛
ᐃࡋࡓp = 8.9㸪17.8kN/m2ࡋࡓ㸬
ࢩ࣮ࢺࡢ㏱Ẽಀᩘka (m/s)ࡣ㸪ࢲࣝࢩ࣮๎ᚑࡗ࡚㸪ḟ ᘧ(1)ࡼࡗ࡚⟬ฟࡉࢀࡿ6)㸬
aa a
* a0
/ /
Q A
k h h L
102
(1)
ࡇࡇ࡛㸪A ( = 78.54cm2 )ࡣࢩ࣮ࢺࡢ᩿㠃✚(┿ࡢࣜࣥ
ࢢෆࡢࢩ࣮ࢺ㠃✚)㸪L* (cm)ࡣࢩ࣮ࢺࡢཌࡉ㸪ha0 (cm)ࡣ ࢩ࣮ࢺୖ㠃࡛ࡢ✵ẼᅽຊỈ㢌࡛࠶ࡿ㸬㍕Ⲵᅽpࢆ࠼ࡓ
0.3cm
⧊ᕸ(ࣇ࣒ࣝಖㆤ)
㏱Ẽ࣭㏱Ỉࣇ࣒ࣝ
⧊ᕸ(ࣇ࣒ࣝಖㆤ) ᅗ ࢩ࣮ࢺ᩿㠃ࡢᶍᘧᅗ
┿ ࢩ࣮ࢺ⾲㠃(⧊ᕸ)ࡢ㢧ᚤ㙾┿
0.1mm
㻌
ᅗ ㏱Ẽヨ㦂⨨ࡢᴫせᅗ
ha Qa
p
┿ ࢩ࣮ࢺࡢྵᾐฎ⌮ࡢᵝᏊ ࢫࢸࣥࣞࢫࣜࣥࢢ
㏱Ẽ࣭㜵Ỉᛶ ࢩ࣮ࢺ
⤥Ỉഃ
ࣅ䣻 䤀ࣞ
䣹 ࢺ
Ỉഃࣅ
䣻䤀ࣞ䣹ࢺ
✵Ẽᅽຊィ ✵Ẽὶ㔞ィ
✵Ẽᅽຊㄪᩚჾ
✵Ẽ
㏱Ẽ࣭㜵Ỉᛶ ࢩ࣮ࢺ
࣏࣮ࣛࢫ ࢫࢺ࣮ࣥ
✵Ẽ ኚィ
Ⲵ㔜ィ
㍕Ⲵᯈ (ከᏍᯈ)
✵Ẽ Ẽཱྀ
㍕Ⲵᅽ
(㏱Ỉヨ㦂➼)
ヨᩱᐜ
ჾ
᮲௳ୗ࡛ࡢ㏱Ẽヨ㦂࡛ࡣ㸪ᅗ♧ࡍࡼ࠺㸪㍕Ⲵᅽࢆ
ࡁࡃࡍࡿࢩ࣮ࢺࡢึᮇࡢཌࡉ( L* = 0.3cm )ࡽ᭱
࡛75%ࡢཌࡉࡲ࡛ࢩ࣮ࢺࡀᅽ⦰ࡉࢀࡓ㸬ᚑࡗ࡚㸪ᘧ(1)ࢆ
⏝࠸࡚㏱Ẽಀᩘࢆ⟬ฟࡍࡿࡁ㸪p = 0࡛ࡣL* = L = 0.3㸪p
= 8.9㸪17.8 kN/m2࡛ࡣL* < 0.3 (ࢩ࣮ࢺࡢึᮇࡢཌࡉ0.3cm
ᑐࡋ࡚㸪ᅗࡢኚ㔞ࡼࡾ㍕Ⲵࡢࢩ࣮ࢺࡢཌࡉࢆồ
ࡵࡓࡁࡢ್)ࡋࡓ㸬࡞࠾㸪ᅗࡢẼཱྀࢆẼᅽゎ ᨺࡍࡿࡇࡼࡾ㸪ᘧ(1)࠾ࡅࡿha0ࢆࢮࣟࡋࡓ㸬
㏱Ỉヨ㦂
㏱Ỉヨ㦂ࡣ㸪ᅗࡢ㏱Ẽヨ㦂⨨ࡢⅬ⥺㒊ศ࡛♧ࡍ
⨨ࡢẼཱྀ✵Ẽὶ㔞ィ᥋⥆⟠ᡤࢆࣅ࣮ࣗࣞࢵࢺ⨨ࡁ
࠼ࡓࡁࡢࡶࡢࢆ⏝࠸ࡓ㸬ヨᩱᐜჾ‵₶≧ែࡢࢩ࣮
ࢺࢆタ⨨ࡋࡓᚋ㸪ᐜჾෆࢆ࡚Ỉ࡛‶ࡓࡋ㸪⤥Ỉഃ
Ỉഃࡢࣅ࣮ࣗࣞࢵࢺỈᕪࢆ࠼࡚ࢩ࣮ࢺ㖄┤ୗྥ
ࡁ㏱Ỉࡉࡏࡿ㸬㍕Ⲵᅽࡣ㸪㏱Ẽヨ㦂ࡢሙྜྠᵝࡢp 0㸪8.9㸪17.8kN/m2ࡋࡓ㸬ࡑࡋ࡚㸪ࣅ࣮ࣗࣞࢵࢺෆࡢ Ỉࡢ⤒ኚࡢ ᐃᇶ࡙࠸࡚㸪㣬㏱Ỉಀᩘkw
(m/s)ࢆࢲࣝࢩ࣮๎ᚑࡗ࡚ḟᘧ(2)ࡼࡗ࡚⟬ฟࡍࡿ㸬
w 1
2 1 2
*
2.303 log
2 ( )
h k aL
A t t h
102
(2)
ࡇࡇ࡛㸪a (cm2)ࡣࣅ࣮ࣗࣞࢵࢺࡢ᩿㠃✚㸪( t2 - t1 ) (s)ࡣ ᐃ㛫㸪h1 (cm)ࡣ้t1࠾ࡅࡿࣅ࣮ࣗࣞࢵࢺࡢỈᕪ㸪 h2 (cm)ࡣ้t2࠾ࡅࡿỈᕪ࡛࠶ࡿ㸬
㏱Ẽಀᩘ
a) ⇱≧ែ࡛ࡢ㏱Ẽಀᩘ
ᅗࡣ㸪㛤Ꮝ⋡n* = 0.64%㸪0.97%㸪1.45%ࡢሙྜࡘ
࠸࡚⇱ࢩ࣮ࢺ࠾ࡅࡿ✵ẼᅽຊỈ㢌ha✵Ẽὶ㔞Qaࡢ 㛵ಀࢆ♧ࡋࡓࡶࡢ࡛࠶ࡿ㸬ᅗ୰ࡢ◚⥺ࡢࡼ࠺㸪ࡇࡢ㛵 ಀୖグࡢᘧ(1)ࢆࣇࢵࢸࣥࢢࡉࡏࡿࡇࡼࡗ࡚
⇱ࢩ࣮ࢺࡢ㏱Ẽಀᩘkaࢆồࡵࡓ㸬
ᅗࡣ㸪㛤Ꮝ⋡n*㏱Ẽಀᩘkaࡢ㛵ಀࢆ♧ࡋࡓࡶࡢ࡛
࠶ࡾ㸪ᚋ㏙ࡢ‵₶ࢩ࣮ࢺࡢሙྜࢆేグࡋࡓ㸬㛤Ꮝ⋡ࡀ
ࡁࡃ࡞ࡿ㏱Ẽಀᩘࡣࡁࡃ࡞ࡿഴྥ࠶ࡿ㸬㍕Ⲵᅽ
ࢆຍ࠼ࡓࡁ㸪p = 0ࡢሙྜࡢ㏱Ẽಀᩘẚ㍑ࡍࡿ㸪p
= 8.9 kN/m2ࡢࡁka್ࡣ6ࡽ9పୗࡋ㸪p = 17.8 kN/m2ࡢࡁ5ࡽ8పୗࡋ࡚㸪㍕Ⲵᅽࡢቑຍࡼࡗ
࡚ࢩ࣮ࢺࡢ㏱Ẽಀᩘࡣపࡃホ౯ࡉࢀࡿ㸬ᅗࡢ◚⥺ࡣ㸪 ḟࡢHagen-Poiseuille๎ᚑࡗࡓḟᘧ(3)ࡼࡿ㛵ಀ7)ࢆ㔜 ࡡྜࡏ࡚♧ࡋࡓࡶࡢ࡛࠶ࡿ㸬
* 2 3
a w a
32 10
k J n d
K
(3)
ࡇࡇ࡛㸪Ȗw (kN/m3)ࡣỈࡢ༢య✚㔜㔞㸪Șa (Pa㺃s)ࡣ✵Ẽ ࡢ⢓ᛶಀᩘ࡛࠶ࡿ㸬p = 0࠾࠸࡚ࡣ㸪ᘧ(3)୰ࡢd
0.32mmࢆ௦ධࡋࡓࡁࡢ㛵ಀࢆᅗ㔜ࡡྜࢃࡏ࡚♧
ࡋࡓ㸬୍᪉࡛㸪p = 8.9㸪17.8kN/m2࠾࠸࡚ࡣ㸪dࢆ
ࣇࢵࢸࣥࢢࣃ࣓࣮ࣛࢱࡋ࡚᭱ᑠἲࡼࡗ࡚ồ
ࡵࡓࡇࢁ㸪p = 8.9kN/m2ࡢࡁd = 0.24mm㸪p = 17.8kN/m2ࡢࡁd = 0.23mm࡛࠶ࡗࡓ㸬㍕Ⲵᅽࡀࡁࡃ
࡞ࡿࢩ࣮ࢺࡢ⣽Ꮝࡀᑠࡉࡃホ౯ࡉࢀ࡚࠸࡚㸪㍕Ⲵࡋ ࡓࡁd ࡀῶᑡࡍࡿࡓࡵka್ࡀᑠࡉࡃ࡞ࡿཎᅉ⪃
࠼ࡽࢀࡿ㸬n* = 0.1㹼1.45%ࡢ⠊ᅖ࡛ࡣ㸪㏱Ẽヨ㦂ࡼࡿ
n*kaࡢ㛵ಀࡣ㸪ᘧ(3)ࡼࡿ㛵ಀࡰྜ⮴ࡍࡿ㸬༶ࡕ㸪
0 5 10 15 20
0 0.2 0.4 0.6 0.8 1
ኚ㔞ț (mm)
㍕Ⲵᅽp(kN/m2) n* = 0.16%
n* = 0.64%
n* = 0.97%
n* = 1.45%
ᅗ ㍕Ⲵᅽኚ㔞
ᅗ 㛤Ꮝ⋡㏱Ẽಀᩘ
ᅗ ha-Qa 㛵ಀ (⇱ࢩ࣮ࢺ)
0 1 2
10-5 10-4 10-3 10-2 10-1
㏱Ẽಀᩘka (m/s)
㛤Ꮝ⋡ n* (%)
⇱ ‵₶
ࠉp = 0kN/m2 p = 8.9kN/m2 p = 17.8kN/m2 ᘧ(3)
㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺ (⇱≧ែ) ࡢ㏱Ẽಀᩘࡢ ᐃ್
0 0.1 0.2 0.3 0.4 0.5 0.6
0 100 200
✵ẼᅽຊỈ㢌ࠉha (cm)
✵Ẽὶ㔞Qa (cm3 /s)
ᘧ(1)
ᐃ್n* = 0.64%
n* = 0.97%
n* = 1.45%
⇱≧ែࡢࢩ࣮ࢺࡢ㏱Ẽಀᩘࡣ㸪ࢩ࣮ࢺ⾲㠃ࡢ⧊ᕸ ࡢ」㞧࡞㛫㝽ᵓ㐀(┿ཧ↷)ࡢᙳ㡪ࡀ⌧ࢀ㞴ࡃ㸪ࡑࡢ
್ࡣ㛤Ꮝ⋡Ꮝᚄࡼࡗ࡚㏆ఝⓗ⾲ࡍࡇࡀ࡛ࡁࡿ㸬 b) ‵₶≧ែ࡛ࡢ㏱Ẽಀᩘ
ᅗࡢۂ༳ࡣ㸪㛤Ꮝ⋡n* = 0.48%࠾࠸࡚㸪p =
17.8kN/m2ࡢࡁࡢ‵₶≧ែࡢࢩ࣮ࢺࡢ✵ẼᅽຊỈ㢌ha
✵Ẽὶ㔞Qaࡢ㛵ಀࢆ♧ࡋࡓࡶࡢ࡛࠶ࡿ㸬✵Ẽᅽࡀ10cm
⛬ᗘࡢࡁ✵Ẽࡀࢩ࣮ࢺࢆ㏱㐣ࡋጞࡵ㸪✵Ẽᅽࢆᚎࠎ
ቑຍࡉࡏࡿ㸪ᅗ୰ࡢ◚⥺ࡢࡼ࠺haQaࡣࡰ┤⥺
㛵ಀ࡞ࡿࡇࡀᚓࡽࢀࡓ㸬‵₶ࢩ࣮ࢺࡢୖୗ㠃࡛ࡢ✵
Ẽ㏱㐣ࡢ✵ẼᅽຊỈ㢌ᕪࡣ(ha – ha0)ࡳ࡞ࡍࡇࡀ࡛
ࡁ4)㸪ᅗࡢ◚⥺ࡢࡼ࠺㸪haQaࡢ┤⥺ⓗ࡞㛵ಀᘧ (1)ࢆࣇࢵࢸࣥࢢࡉࡏࡿࡇࡼࡗ࡚㸪‵₶ࢩ࣮ࢺࡢ
㏱Ẽಀᩘkaࢆồࡵࡿࡇࡀ࡛ࡁࡿ4)㸬ୖグࡢᅗࡣ㸪
‵₶ࢩ࣮ࢺࡢ㛤Ꮝ⋡㏱Ẽಀᩘࡢ㛵ಀࢆ♧ࡋࡓ㸬
‵₶ࢩ࣮ࢺࡢ㏱Ẽಀᩘࡣ㸪⇱ࢩ࣮ࢺࡢ1/10⛬ᗘప
ୗࡋࡓ㸬ࡇࢀࡣ㸪ࢩ࣮ࢺࢆಖㆤࡍࡿ⧊ᕸࡢ㛫㝽ࡀಖỈ ࡋ㸪⣽Ꮝࡢ୍㒊ࢆሰ࠸ࡔࡇࡀཎᅉࡔ⪃࠼ࡽࢀࡿ㸬୍
᪉࡛㸪㍕Ⲵᅽࢆຍ࠼ࡓࡁ㸪p = 0ࡢሙྜࡢ‵₶ࢩ࣮ࢺࡢ
㏱Ẽಀᩘẚ㍑ࡍࡿ㸪p = 8.9 kN/m2ࡢࡁka್ࡣ3
ࡽ5పୗࡋ㸪p = 17.8 kN/m2ࡢࡁ2ࡽ5పୗࡋࡓ㸬
㍕Ⲵᅽࡀຍࢃࡿ⧊ᕸࡢ⧄⥔ࡼࡿ㛫㝽ࡀ⊃ࡃ࡞ࡗ࡚
ಖỈᛶࡀ㧗ࡲࡿࡓࡵ㸪✵Ẽὶᑐࡍࡿᢠࡀ㧗ࡃ࡞ࡿࡇ
ࡼࡿ⪃࠼ࡽࢀࡿ㸬ᅗࡢ‵₶≧ែࡢ㏱Ẽಀᩘ㛤 Ꮝ⋡ࡢ㛵ಀࡣ㸪⇱≧ែࡢ㛵ಀẚ࡚㸪⣽Ꮝࡢ㛫Ꮝ⋡
ࡼࡿᙳ㡪ࡀ⌧ࢀ㞴ࡃ㸪⧊ᕸࡢಖỈᛶࡀᨭ㓄ⓗᙳ㡪 ࡍࡿࡢ࡛ࡣ࡞࠸⪃࠼ࡽࢀࡿ㸬
㏱Ỉಀᩘ
ᅗࡣ㸪㏱Ỉヨ㦂࡛ᚓࡽࢀࡓ㛤Ꮝ⋡n*㣬㏱Ỉಀᩘ
kw (m/s)ࡢ㛵ಀࢆ♧ࡋࡓࡶࡢ࡛࠶ࡿ㸬㍕Ⲵᅽࢆ࠼ࡿ
㣬㏱Ỉಀᩘࡣⱝᖸపୗࡍࡿࡀ㸪࠾࠾ࡴࡡkw = 10-5 m/s⛬ ᗘ࡛࠶ࡾప㏱Ỉᛶࡢ್ࢆ♧ࡋ㸪㛤Ꮝ⋡ࡀࡁࡃ࡞ࡿ
㧗ࡵ࡞ࡿഴྥ࠶ࡿ㸬
ࢩ࣮ࢺࡢ㜵Ỉᛶࡘ࠸࡚ࡣḟࡢ㖄┤୍ḟඖᶍᆺᐇ㦂
ࡼࡗ࡚☜ㄆࡍࡿ㸬
㸱㸬㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺᩜタࡼࡿᄇⓎ⌧㇟ᢚไ
᪤ ࡢ◊✲3)࡛ࡣ㸪ୖ㏙ࡋࡓࡼ࠺㸪10-5m/s࣮࢜ࢲ࣮
ࡢ㣬㏱Ỉಀᩘࢆࡶࡘᅵ㉁ᮦᩱࡀ㝆㞵ἙᕝỈࡢᛴ⃭࡞
ᾐỈࢆཷࡅࡓࡁ㛫㝽✵ẼࡢᄇⓎ⌧㇟ࡀ⏕ࡌࡿࡇࡀ ᚓࡽࢀ㸪ࡇࡢ⌧㇟ࢆᢚไࡍࡿࡣ㸪ᾐỈࡢࢫ࣒࣮ࢫ࡞
㛫㝽✵Ẽࡢฟࡢࡓࡵࡢ10-4m/s࣮࢜ࢲ࣮௨ୖࡢ㏱Ẽಀᩘ
ࡢ⥔ᣢࡀせồࡉࢀࡿ⪃࠼ࡽࢀࡓ㸬௨ୗ࡛ࡣ㸪㣬࡞
ᶍᆺᆅ┙ࡘ࠸࡚㸪ࡑࡢ⾲㠃㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺࢆᩜ
タࡍࡿࡇࡼࡗ࡚㛫㝽✵ẼᄇⓎࡢᢚไࢆ☜ㄆࡋࡓ㸬
ࢩ࣮ࢺᩜタࡋࡓࡁࡢᾐỈᐇ㦂 a) ⨨᪉ἲ
ᅗࡣ㸪ᶍᆺᆅ┙ࡢ㖄┤୍ḟඖᾐỈᐇ㦂⨨ࡢᴫせࢆ
♧ࡋࡓࡶࡢ࡛࠶ࡾ㸪ࡑࡢ┿ࢆ┿♧ࡋࡓ㸬⨨ࡣ㸪 ヨᩱࢆሸࡍࡿヨᩱ⟶(ෆᚄij15cm㸪㛗ࡉL = 200cmࡢ
ࢡࣜࣝ〇ࡢ⟄⟶)㸪ᆅ⾲ࡽ㝆㞵ࢆᾐỈࡉࡏࡿࡓࡵࡢ ᩓỈ⨨㸪ἙᕝỈࢆᐃࡋ࡚ヨᩱᒙୗ㒊ࡽᾐỈࡉࡏࡿ
ࡓࡵࡢ㈓Ỉ⟶(ෆᚄij10cm㸪㛗ࡉ200cmࡢࢡࣜࣝ〇ࡢ
⟄⟶)㸪ヨᩱᒙෆࡢ㣬ᗘSr (%)㸪㛫㝽Ỉᅽuw (kN/m2)㸪 㛫㝽✵Ẽᅽua (kN/m2)ࡢࡑࢀࡒࢀࢆ ᐃࡍࡿࡓࡵࡢỈศ ィ㸪㛫㝽Ỉᅽィ㸪㛫㝽✵Ẽᅽィࡼࡗ࡚ᵓᡂࡉࢀ࡚࠸ࡿ㸬
ヨᩱࡣ㸪◡◁6ྕ(50%⢏ᚄD50 = 0.337mm)◡◁8ྕ (D50 = 0.099mm㸪㣬㏱Ỉಀᩘkw = 3.0 × 10-5m/s)ࢆ⏝࠸ࡓ㸬
ඛࡎ㸪◡◁8ྕࢆ㛗ࡉL = 150cm࡛ሸࡋࡓࡶࡢ(㛫㝽⋡
n = 0.468)ࢆᾐỈ㣬ࡉࡏ㸪㔜ຊỈࢆ⾜ࡗࡓࡶࡢࢆึᮇ
≧ែࡋࡓ㸬ࡑࡢᚋ㸪◡◁8ྕࡼࡿヨᩱᒙࡢᆅ⾲㠃
㛤Ꮝ⋡n* = 0.1%ࡢ㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺࢆࢩࣜࢥ࡛ࣥヨᩱ
⟶᥋╔ࡋ࡚ᩜタࡋ㸪ࡑࡢୖ㠃そᅵࢆᐃࡋࡓ◡◁6
ྕ(n = 0.462)ࢆሸࡋࡓ㸬࡞࠾㸪Ỉศィ㸪㛫㝽Ỉᅽィࡢ ᅗ 㛤Ꮝ⋡㏱Ỉಀᩘ
0 1 2
10-7 10-6 10-5 10-4 10-3
㣬㏱Ỉಀᩘkw (m/s)
㛤Ꮝ⋡ n* (%)
p = 0kN/m2 p = 8.9kN/m2 p = 17.8kN/m2
0 10 20
0 50 100 150
✵ẼᅽຊỈ㢌 ha (cm)
✵Ẽὶ㔞Qa (cm3 /s)
p =17.8kN/m2
ha0 ᘧ(1)
n* = 0.48%
ᅗha-Qa㛵ಀ (‵₶ࢩ࣮ࢺ)
ࡑࢀࡒࢀࡣ㸪◡◁6ྕࡢヨᩱᒙࡢᗏ㠃ࡽ5cmࡢ㧗ࡉ㸪
◡◁8ྕࡢヨᩱᒙࡢ⾲㠃ࡽࡢ῝ࡉz = 5㸪45cmࡢ3⟠ᡤ㸪 㛫㝽✵Ẽᅽィࡣ◡◁8ྕࡢz = 5㸪15㸪45cmࡢ3⟠ᡤࡑࢀ
ࡒࢀタ⨨ࡋࡓ㸬ࡑࡋ࡚㸪㝆㞵㔞R = 80mm/hr࡛ᩓỈࡋ㸪
◡◁6ྕࡢヨᩱᒙෆタ⨨ࡋࡓỈศィ㝆㞵ᾐỈࡢᾐ₶
㠃ࡀ฿㐩ࡋࡓࡁ㸪㈓Ỉ⟶ࡢỈࢆỈୖ᪼㏿ᗘvH =
100cm/hr࡛ୖ᪼ࡉࡏࡿࡇ࡛ᆅ┙ୗ㒊ࡽᾐỈࢆ㛤ጞࡋ
ࡓ㸬࡞࠾㸪ᾐỈᐇ㦂࡛ࡣ㸪ࢩ࣮ࢺୖ㠃㝆㞵ᾐ㏱Ỉࡀ㐩 ࡋࡓࡁ㸪‣ỈࢆⓎ⏕ࡉࡏ࡞࠸ࡓࡵヨᩱ⟶ࡢ୍㒊Ỉ
⟠ᡤࢆタ⨨ࡋࡓ㸬ࡲࡓ㸪㈓Ỉ⟶ෆࡢỈࡀ◡◁8ྕࡢヨ
ᩱᒙࡢᆅ⾲㠃ྠࡌ㧗ࡉ(ヨᩱᒙᗏ㠃ࡽ150cm㧗ࡉ)
㐩ࡋࡓࡁᐇ㦂ࢆ⤊ࡋࡓ㸬 b) ࢩ࣮ࢺࡢ㏱Ẽ࣭㜵Ỉᛶ
ᅗࡣ㸪ᾐỈక࠺ヨᩱᒙࡢ㣬ᗘSr㸪㛫㝽Ỉᅽuw㸪 㛫㝽✵Ẽᅽuaࡢ⤒ኚࢆࡑࢀࡒࢀ♧ࡋࡓࡶࡢ࡛࠶ࡿ㸬 㝆㞵ࡼࡗ࡚ᆅ⾲㏆(z = 5cm)ࡢ㣬ᗘࡣึᮇ≧ែࡽ
ኚࡋ࡞࠸ࡓࡵ㸪ࢩ࣮ࢺࡀ㝆㞵ࡢᾐỈࢆᢚไࡋࡓ⪃࠼
ࡽࢀࡿ㸬୍᪉㸪ୗ㒊ࡽࡢᾐỈࢆ㛤ጞࡋ࡚ヨᩱᒙෆࡢ㛫 㝽✵Ẽࡢฟ㐣⛬⮳ࡗ࡚ࡶ㸪㛫㝽✵Ẽᅽィ࠾࠸࡚ᅽ ຊࡢቑࡣ☜ㄆࡉࢀ࡞ࡗࡓࡓࡵ㸪ࢩ࣮ࢺࡢᩜタࡼࡗ
࡚ᆅ⾲ࡢ㏱Ẽᛶࡀ☜ಖࡉࢀ㸪㛫㝽✵Ẽࡀࢫ࣒࣮ࢫฟ ࡋࡓ⪃࠼ࡽࢀࡿ㸬
ࢩ࣮ࢺᩜタࡋ࡞࠸ሙྜࡢᾐỈᐇ㦂 a) ⨨᪉ἲ
ᅗࡢ⨨࠾࠸࡚㸪ୖ㏙ࡢࢩ࣮ࢺᩜタࡢᾐỈᐇ㦂
⤊ᚋ㸪ࢩ࣮ࢺ◡◁6ྕࢆ㝖ཤࡋ࡚◡◁8ྕࡢࡳࡋ ࡓ≧ែ࡛㸪ᗘ㔜ຊỈࡉࡏ㣬ᗘศᕸࢆᖹ⾮≧ែࡋ ࡓ㸬ࡑࡋ࡚㸪ࡑࢀࢆึᮇ≧ែࡋࡓࡁࡢୖ㏙ྠࡌ㝆 㞵➼ࡢ᮲௳ୗ࡛ࡢᾐỈᐇ㦂ࢆ⾜ࡗࡓ㸬
b) 㛫㝽✵ẼᅽࡢⓎ⏕
ᅗࡢࢩ࣮ࢺࢆᩜタࡋ࡞࠸ሙྜ࡛ࡣ㸪z = 5cm࠾࠸
࡚㸪㝆㞵ᾐỈࡼࡗ࡚㣬ᗘࡀ80%⛬ᗘࡲ࡛ୖ᪼ࡍࡿ㸬 㛫㝽✵Ẽᅽࡣ㸪ୗ㒊ᾐỈ㛤ጞࡼࡾ20ศ⛬ᗘ⤒㐣ࡋ㸪ᆅ⾲
㠃㏆ࡢ㣬ᗘࡀ༑ศ㧗ࡃ࡞ࡗࡓࡁz = 45cm࡛
ᚎࠎୖ᪼ࡋጞࡵ㸪᭦35ศ⤒㐣ᚋ㛫㝽✵Ẽᅽua =
5kN/m2⛬ᗘ㐩ࡋ㸪ᆅ⾲࡛㛫㝽✵ẼࡢᄇⓎ⌧㇟ᆅ⾲
㏆࡛டࡢⓎ⏕(┿)ࡀほᐹࡉࢀࡓ㸬㛫㝽✵ẼᅽⓎ⏕
క࠺ᆅ┙ࡢኚ≧ࡣ㸪ึᮇẁ㝵࡛ࡣᆅ⾲㠃㏆ࡢ⠊ᅖ࡛
ᅵ⢏Ꮚࡢὶືࡀ⏕ࡌ࡚࠸ࡓࡀ㸪㛫ࡢ⤒㐣కࡗ࡚z
= 5cm㏆࡛ࡁ࡞டⓎ㐩ࡋࡓ㸬ࡇࡢࡼ࠺㸪ࢩ࣮
ࢺᩜタࡋ࡞࠸ሙྜࡣ㸪㛫㝽✵ẼࡢᄇⓎ⌧㇟ࡀⓎ⏕ࡍࡿ
ࡇࡀ☜ㄆࡉࢀࡓࡀ㸪ୖ㏙㸬ࡢࡼ࠺ࢩ࣮ࢺᩜタ
ࡼࡗ࡚ᄇⓎ⌧㇟ࡀᢚไࡉࢀࡿࡇࡀ᳨ドࡉࢀࡓ㸬
㸲㸬࠶ࡀࡁ
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㛫㝽Ỉᅽィ ( 3⟠ᡤ)
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㛫㝽✵Ẽᅽィ ( 3⟠ᡤ)
┿ ᶍᆺᆅ┙ᾐỈᐇ㦂⨨
㈓ Ỉ
⟶ ヨ
ᩱ
⟶
㛫㝽Ỉᅽィ 㛫㝽✵Ẽᅽィ
◡◁6ྕ
ࡢヨᩱᒙ
㏱Ẽ࣭㜵Ỉᛶ ࢩ࣮ࢺ
◡◁8ྕ ࡢヨᩱᒙ ᩓỈ⨨
Ỉ ศ ィ
ࢩ࣮ࢺࡢຠᯝࢆ⪃ᐹࡋࡓ㸬㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺࡣ㸪そᅵ
ࡼࡗ࡚㍕Ⲵࡉࢀࡓሙྜ࡛ࡶ㸪⇱࡛10-3m/s࣮࢜ࢲ࣮
௨ୖࡢ㏱Ẽಀᩘ㸪‵₶࡛10-4m/s௨ୖࡢ㏱Ẽಀᩘࢆ☜ಖ
࡛ࡁࡓ㸬୍᪉࡛㸪ࡑࡢࢩ࣮ࢺࡢ㣬㏱Ỉಀᩘࡣ10-5m/s⛬ ᗘ࡛࠶ࡗࡓ㸬ࡑࡋ࡚㸪ᄇⓎ⌧㇟ࡀ⏕ࡌࡿࡘ࠸࡚㸪
ྠࡌᶍᆺᆅ┙ࡢᆅ⾲㏆㏱Ẽ࣭㜵Ỉᛶࢩ࣮ࢺࢆᩜタࡋ
࡚㝆㞵ἙᕝỈࡼࡿᾐỈᐇ㦂ࢆᐇࡋࡓ⤖ᯝ㸪ᾐỈ
㛫㝽✵Ẽࡀᆅ⾲ࡽࢫ࣒࣮ࢫฟࡍࡿࡓࡵ㛫㝽✵
ẼᅽⓎ⏕ࡸ◚ቯ⌧㇟ࢆゎᾘ࡛ࡁࡿࡇࡀ᳨ドࡉࢀࡓ㸬
ㅰ㎡㸸ᮏ◊✲ࡣ㸪JSPS⛉◊㈝25420500ࡢຓᡂࢆཷࡅࡓ㸬
ࡲࡓ㸪(බ㈈)Ἑᕝ㈈ᅋࡢᖹᡂ26ᖺᗘἙᕝᩚഛᇶ㔠ࡢຓᡂ
ࢆཷࡅࡓ㸬㛵ಀྛㅰពࢆ⾲ࡍࡿ㸬
ཧ⪃ᩥ⊩
1)๓⏣୍㸪ᰘ⏣ ㈼㸪㤿ሙᖸඣ㸪ᑠᯘ ๛㸪ᯠᑿᏕஅ㸪ᑿ⏿
ຌ㸸ᶍᨃሐ㜵ᅵᵴᐇ㦂ࡼࡿ࢚ࣈ࣮ࣟࡢ☜ㄆᩘ್ゎᯒ㸪 Ἑᕝᢏ⾡ㄽᩥ㞟㸪Vol.18㸪pp.305-310㸪2012.
2)๓⏣୍㸪ᮡಇኵ㸪ᱝᑿᏕஅ㸪ᑠᯘ ๛㸪⮻⏣ᩥ㸪㯮⏣
ⱥఙ㸪ᰘ⏣ ㈼㸪㰺⸨ ၨ㸸ᐇἙᕝሐ㜵࠾ࡅࡿ㞵ᑐ⟇
ࡋ࡚ࡢ㏱Ẽ㐽Ỉࢩ࣮ࢺࡢタ⨨ຠᯝ㸪ࢪ࢜ࢩࣥࢭࢸࢵࢡࢫㄽ
ᩥ㞟㸪Vol.28㸪pp.31-36㸪2013.
3)⚄㇂ᾈ㸪ሙᩗኈ㸪ᒣ⏣࿘స㸸Ἑᕝሐ㜵ࡢᾐỈక࠺㛫㝽
✵ẼᅽⓎ⏕ࡑࢀࡼࡿ◚ቯ⌧㇟㛵ࡍࡿᐇ㦂ⓗ⪃ᐹ㸪Ἑᕝ ᢏ⾡ㄽᩥ㞟㸪Vol.20㸪pp.473-478㸪2014.
4))⚄㇂ᾈ㸪▼⏣ṇ㸪㧗ᮌⱥ▱㸸㛫㝽✵Ẽሢࡼࡿሐ㜵ࡢ
࢚ࣈ࣮ࣟ㜵Ṇᑐ⟇ᕤࡢᇶ♏ᐇ㦂㸪Ἑᕝᢏ⾡ㄽᩥ㞟㸪Vol.18㸪 pp.311-314㸪2012.
5)⚄㇂ᾈ㸪ᒣ⏣࿘స㸪▼⏣ṇ㸸Ἑᕝሐ㜵ࡢᾐỈࡢ㛫㝽✵
ẼᅽⓎ⏕ࢆᢚไࡍࡿࢩ࣮ࢺᑐ⟇ᕤ㛵ࡍࡿᐇ㦂ⓗ⪃ᐹ㸪ࢪ࢜
ࢩࣥࢭࢸࢵࢡࢫㄽᩥ㞟㸪Vol.28㸪pp.17-22㸪2013.
6)Ᏹ㔝ᑦ㞝㸪ᮡಇኵ㸪⚄㇂ᾈ㸸ẚ⾲㠃✚ ᐃᇶ࡙ࡃᅵ⢏
Ꮚ≀ᛶ㏱Ẽᛶ࣭㏱Ỉᛶࡢ⪃ᐹ㸪ᅵᮌᏛㄽᩥ㞟㸪No.469/
Ϫ-23㸪pp.25-34㸪1993.
7) Bear, J. : Dynamics of Fluids in Porous Media, American Elsevier Publ. Co., pp.162-163, 1972.
㸦ཷ㸧 ᅗ 㣬ᗘ㸪㛫㝽Ỉᅽ࣭✵Ẽᅽ(ࢩ࣮ࢺᩜタ࠶ࡾ)
0 20 40 60 80 100
ୗ 㒊 ᾐ Ỉ 㛤 ጞ ᐇ 㦂 ⤊
㣬ᗘSr (%)
そ ᅵ(◡ ◁6ྕ ෆ)
z = 5cm z = 45cm
そ ᅵ(◡ ◁6ྕ ෆ)
z = 45cm z = 5cm
z = 5cm㸪15cm㸪45cm
-15 -10 -5 0 5
㛫㝽Ỉᅽuw (kN/m2 )
0 60 120 180
0 5 10
㛫㝽✵Ẽᅽua (kN/m2 )
㛫t (min)
ᅗ 㣬ᗘ㸪㛫㝽Ỉᅽ࣭✵Ẽᅽ(ࢩ࣮ࢺᩜタ࡞ࡋ) 0
20 40 60 80 100
ୗ 㒊 ᾐ Ỉ 㛤 ጞ ᐇ 㦂 ⤊
㣬ᗘSr (%)
z = 5cm
z = 45cm
z = 5cm
-15 -10 -5 0 5
㛫㝽Ỉᅽuw (kN/m2 )
z = 45cm
z = 5㸪15cm z = 45cm ᄇ Ⓨ 㸪 ட Ⓨ ⏕
0 60 120 180
0 5 10
㛫㝽✵Ẽᅽua (kN/m2 )
㛫 t (min)
‣ Ỉ Ⓨ ⏕
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