EXAMINATION OF THE BURROWING TYPE SEDIMENT REMOVAL SUCTION PIPE BY THE SEDIMENT DISCHARGE FIELD TEST FOR PRACTICAL USE

ሗ࿌ Ἑᕝᢏ⾡ㄽᩥ㞟➨ ᕳ ᖺ ᭶

₯⾜྾ᘬᘧ᤼◁⟶ࡢ⌧ᆅ᤼◁ᐇ㦂࡟ࡼࡿ

ᐇ⏝໬࡟ྥࡅࡓ᳨ウ

EXAMINATION OF THE BURROWING TYPE SEDIMENT REMOVAL SUCTION PIPE BY THE SEDIMENT DISCHARGE FIELD TEST FOR PRACTICAL USE

ᐑᕝ ோ

࣭ᐑ⬥ ༓ᬕ

࣭Ḉ஭ ᑑஅ

࣭▼⚄ Ꮥஅ

࣭⟽▼ ᠇᫛

Masashi MIYAKAWA, Chiharu MIYAWAKI, Toshiyuki SAKURAI and Noriaki HAKOISHI

1ṇ఍ဨ ᅵᮌ◊✲ᡤỈᕤ◊✲㺖㺼㺷㺎㺪㺽Ỉ⌮㺟㺎㺯୺௵◊✲ဨ(ࠛ305-8516 ࡘࡃࡤᕷ༡ཎ1-6) 2ṇ఍ဨ ᅵᮌ◊✲ᡤỈᕤ◊✲㺖㺼㺷㺎㺪㺽Ỉ⌮㺟㺎㺯ୖᖍ◊✲ဨ(ྠୖ)

3ṇ఍ဨ ࢲ࣒ᢏ⾡ࢭࣥࢱ࣮ 㤳ᖍ◊✲ဨ(ࠛ110-0008 ྎᮾ༊ụஅ➃2-9-7)

Sediment supply measures from a reservoir are required to reduce sedimentation and to preserve the downstream river bed environment. Then, we have been trying to develop a new sediment supply measures using the differential water head energy between upstream and downstream of a dam. We have proposed “the burrowing type sediment removal suction pipe method”. In this study, in order to obtain knowledge for practical application of the pipe, we carried out the sediment discharge field test using the 200mm and 300 mm diameter pipe at the actual reservoir. As a result, we understood the hydraulic characteristics, the applicability to the material, and the availability of the pipe. It was confirmed that the pipe could discharge sediment at almost the expected performance for reservoir material (almost non- cohesive debris-less sediment material). .

Key Words : reservoir sedimentation, burrowing type sediment removal suction pipe, field test, sediment discharge test

㸯㸬ࡣࡌࡵ࡟

ࢲ࣒㈓Ỉụࡢሁ◁ᑐ⟇࠾ࡼࡧࢲ࣒ୗὶࡢὶ◁⎔ቃࡢ ಖ඲࣭ᨵၿࡢࡓࡵ࡟㸪᪤Ꮡࡢሁ◁ᑐ⟇ᡭἲ࡟ຍ࠼࡚㸪ࡼ

ࡾᗈ⠊ᅖ࡞㈓Ỉụ᮲௳࡟㐺⏝ྍ⬟࡛㸪⤒῭ⓗ࡞ᅵ◁౪⤥

ᡭἲࡀồࡵࡽࢀ࡚࠸ࡿ㸬ࡑࡇ࡛㸪➹⪅ࡽࡣ㈓Ỉụࡢୖୗ

ὶỈ఩ᕪ࡟ࡼࡿ࢚ࢿࣝࢠ࣮ࢆά⏝ࡋࡓࣇࣞ࢟ࢩࣈࣝ⟶ࢆ

⏝࠸ࡓ᤼◁ᡭἲࡢ㛤Ⓨࢆヨࡳ࡚࠸ࡿ㸬ࡇࢀࡲ࡛ࡢ᳨ウ࡟

ࡼࡾࠕ₯⾜྾ᘬᘧ᤼◁⟶ࠖ࡜⛠ࡍࡿ⿦⨨ࢆᥦ᱌ࡋ㸪ᐊෆ ᐇ㦂㸪⌧ᆅᐇ㦂ࢆ㏻ࡌ࡚㸪⢓╔ᛶࡢ࡞࠸ᅵ◁ࢆᑐ㇟࡟㸪

⟶ᚄ200mmࡲ࡛ࡢ᤼◁⟶࡟ࡼࡿᐇ㦂ࢆ㏻ࡌ᤼◁≉ᛶࢆ

ᢕᥱࡋ࡚ࡁࡓ^1),2)㸬ᮏ✏ࡣ㸪᤼◁⟶ࡢᐇ⏝໬࡟ྥࡅࡓ▱

ぢࢆᚓࡿࡓࡵ࡟ሻⰰࡸ⢓ᛶᅵࢆከᑡྵࡴᐇ㝿ࡢࢲ࣒ሁ◁

ࢆᑐ㇟࡜ࡋ࡚㸪༓ⴥ┴ࡀ⟶⌮ࡍࡿ㣴⪁ᕝ୰ὶ࡟࠶ࡿ㧗

ࢲ࣒㈓Ỉụෆࡢ᪥➉㈓◁ࢲ࣒㸦௨ୗ㸪㈓◁ࢲ࣒㸧࡟࠾࠸

࡚2013ᖺ11᭶18᪥㹼11᭶23᪥࡟⟶ᚄ200mmࡢ₯⾜

྾ᘬᘧ᤼◁⟶࡟ࡼࡿ⌧ᆅ᤼◁ᐇ㦂ࢆ㸪2014ᖺ11᭶24

᪥㹼11᭶30᪥࡟⟶ᚄ300mmࡢ₯⾜྾ᘬᘧ᤼◁⟶࡟ࡼ

ࡿ⌧ᆅ᤼◁ᐇ㦂ࢆᐇ᪋ࡋࡓ⤖ᯝ࠿ࡽᚓࡽࢀࡓ᭷⏝࡞▱ぢ

࡟ࡘ࠸࡚࣏࢖ࣥࢺࢆ⤠ࡗ࡚ሗ࿌ࡍࡿ³⁾㸬

㸰㸬₯⾜྾ᘬᘧ᤼◁⟶ࡢᨵⰋ

ࠕ₯⾜྾ᘬᘧ᤼◁⟶ࠖ㸦௨ୗ㸪᤼◁⟶㸧࡜ࡣ㸪ࣇࣞ࢟

ࢩࣈࣝ⟶ࢆUᏐᙧ≧࡜ࡋ୍࡚᪉ࢆྲྀỈཱྀ࡜ࡋ㸪ᢡ㏉ࡋ 㒊㸦௨ୗ㸪྾ᘬ㒊㸧ࡢ⟶ᗏ㠃࡟ࢩ࣮ࢺࢆ㈞ࡾ㸪྾ᘬ㒊࡜

ୖὶ㒊ࡢ⟶ᗏ㠃࡟✰ࢆタࡅ࡚ᅵ◁ࡢ྾ᘬཱྀ࡜ࡋࡓࡶࡢ࡛

࠶ࡿ^1)-3)㸬᪤ ࡢ⌧ᆅᐇ㦂࡛ࡢ᳨ウ࡛ࡣ㸪ࢩ࣮ࢺࡢᶵ⬟

ࢆ௦⏝ࡍࡿᙧ࡜ࡋ࡚㸪྾ᘬ㒊ࢆ㕲࡛〇సࡋ㸪㔜㔞ࢆቑຍ ࡉࡏ࡚ᐇ㦂ࢆ⾜ࡗࡓࡀ㸪᤼◁࡟క࠸㸪྾ᘬ㒊ࡀഴࡁ㸪ᗏ 㒊ࡢ྾ᘬཱྀ࠿ࡽỈࡀ྾࠸㎸ࡲࢀࡿࡇ࡜࡟ࡼࡿ྾ᘬ㒊ࡢሁ

◁㠃࡬ࡢ㏣ᚑ࡟㛵ࡍࡿㄢ㢟ࡀ᫂ࡽ࠿࡜࡞ࡗࡓ²⁾ 㸬ࡑࡇ

࡛㸪⟶ᚄ200mmࡢ᤼◁⟶ࢆ⏝࠸ࡓ⌧ᆅ᤼◁ᐇ㦂ࢆ⾜࠺

࡟࠶ࡓࡗ࡚㸪෌ᗘࢩ࣮ࢺ㸦ᗏ㠃࡟༙ᚄ200mmࡢ෇ᙧࡢ ኳ↛ࢦ࣒㸦ཌࡳࡣ3mm㸧㸧ࢆタ⨨ࡍࡿࡇ࡜࡜ࡋ㸪ࢩ࣮

ࢺࡢᕳࡁ㎸ࡳ࡟ࡼࡿ྾ᘬཱྀࡢ㛢ሰࡢ㜵ṆࡢほⅬ࠿ࡽ㸪ᅗ -㸯࡟♧ࡍࡼ࠺࡟ࢦ࣒ࢆ㗰ᯈ࡛ᣳࡴᙧ≧࡟ᨵⰋࡋࡓ㸬࡞

࠾㸪྾ᘬཱྀࡣ㸪ࡇࢀࡲ࡛ࡢᐊෆᐇ㦂ࡢ⤖ᯝࢆࡶ࡜࡟3㹼 10%⛬ᗘࡢᅵ◁⃰ᗘࡀᚓࡽࢀࡿࡼ࠺㸪྾ᘬ㒊ᗏ㠃࡟┤ᚄ 10cmࡢ✰ࢆ7ಶ㸪ୖὶ⟶ᗏ㠃࡟┤ᚄ9cmࡢ✰ࢆ50cm 㛫㝸࡛6ಶタ⨨ࡋࡓ㸬⟶ᚄ300mmࡢ᤼◁⟶ࡣ㸪ࡇࡢ┦

ఝᙧ≧࡛〇సࡋࡓ㸬

ሗ࿌ Ἑᕝᢏ⾡ㄽᩥ㞟, ➨21ᕳ, 2015ᖺ6᭶

ᅗ㸯྾ᘬ㒊ᙧ≧㸦ȭPP㸧

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0 10 20 30 40 50 60 70 80 90 100

0.001 0.01 0.1 1 10 100

㏻㐣㉁㔞ⓒศ⋡(%)

⢏ᚄ(mm)

㸱㸬⌧ᆅ᤼◁ᐇ㦂ࡢ‽ഛ

㈓◁ࢲ࣒ࡣᅗ-㸰࡟♧ࡍ᪋タ࡛࠶ࡾ㸪㧗ࡉ3.2m㸪ሐ㡬

㛗82.1m࡛㸪ᖹỈ᫬ࡣ㸪㉺ὶỈ῝ᩘࢭࣥࢳ㸪Ỉ఩ᕪࡣ

⣙1.6m⛬ᗘࡀ☜ಖ࡛ࡁࡿ᪋タ࡛࠶ࡿ㸬ࡲࡓ㸪㈓◁ࢲ࣒

ࡣ㧗ࢲ࣒㈓Ỉụ࡬ࡢሁ◁ὶධࢆ㍍ῶࡉࡏࡿࡓࡵ࡟タ⨨

ࡉࢀ࡚࠾ࡾ㸪㸰ᖺ࡟㸯ᗘỈ఩ࢆపୗࡉࡏ࡚㈓◁ࢲ࣒ෆࡢ ሁ◁ࢆࣂࢵࢡ࣍࢘➼ࡢ㔜ᶵࢆ⏝࠸࡚㸪᥀๐㸪ᦙฟࡋ࡚࠸

ࡿ㸬ࡇࡢࡓࡵ㸪㈓◁ࢲ࣒࡬ࡢ㔜ᶵࡢ࢔ࢡࢭࢫࡣᐜ᫆࡜

࡞ࡗ࡚࠸ࡿ㸬ࡲࡓ㸪ሁ◁ࡀ㐍ࡳỈ῝ࡀᩘ༑ࢭࣥࢳ⛬ᗘࡢ ሙᡤࡶ࠶ࡿ࡞࡝㸪ᐇ㦂᫬ࡢἙᗋィ ࡞࡝ࡢసᴗࢆຠ⋡ⓗ

࡟⾜࠼ࡿ⎔ቃ࡜࡞ࡗ࡚࠸ࡿࡇ࡜࠿ࡽ㸪⌧ᆅ᤼◁ᐇ㦂ሙᡤ

࡟㑅ᐃࡋࡓ㸬

ࡲࡓ㸪㈓◁ࢲ࣒┤ୗὶࡣ㸪࢔ࣘࡢ⁺ሙ㸪㎰ᴗ⏝Ỉࡢྲྀ

Ỉཱྀࡀタ⨨ࡉࢀࡿࡇ࡜࠿ࡽ㸪㣴⪁ᕝ⁺ᴗ༠ྠ⤌ྜ㸪ຍⱱ ᅵᆅᨵⰋ༊࡬ᐇ㦂ࡢ┠ⓗ㸪ព⩏࡟ࡘ࠸࡚ࡈㄝ᫂ࡋ㸪ࡈ⌮

ゎࢆ࠸ࡓࡔ࠸ࡓ㸬࡞࠾㸪ࡇࡢ㝿࡟ࡣ㸪ᮏᢏ⾡ࡢ᪩ᮇ㛤Ⓨ㸪 ᐇ⏝໬ࢆᮇᚅࡍࡿࡈពぢࡶ࠸ࡓࡔ࠸ࡓ㸬ࡇࡢᚋ࡟㸪༓ⴥ

┴࠿ࡽἙᕝࡢ୍᫬౑⏝ཬࡧ㈓◁ࢲ࣒ࡢ᪋タ೉⏝ࡢチྍࢆ

࠸ࡓࡔࡁ㸪ᐇ㦂ࢆᐇ᪋࡛ࡁࡿ㐠ࡧ࡜࡞ࡗࡓ㸬

ࡉࡽ࡟㸪᤼◁⿦⨨ࡢᐇ⏝໬ࡢࡓࡵ࡟ࡣ㸪⿦⨨ࢆ࡝ࡢ

ࡼ࠺࡟㈓Ỉụ࡬タ⨨ࡋ㸪⟶⌮࣭㐠⏝ࡍࡿ࠿ࡀ㔜せ࡟࡞ࡿ㸬 ࡑࡇ࡛㸪᝿ᐃࡉࢀࡿᐇ≀㸦⟶ᚄ300㹼600mm⛬ᗘ㸧࡟

㏆࡙ࡅࡓ௒ᅇࡢ⌧ᆅ᤼◁ᐇ㦂࡟࠾ࡅࡿ‽ഛ≧ἣࢆグ㍕ࡍ

ࡿ㸬

᤼◁⟶㸪ィ ᶵჾ㸪ࡑࡢ௚ᶵᮦ➼࡟ࡘ࠸࡚ࡣ㸪Ⲉᇛ

┴ࡘࡃࡤᕷࡢᅵᮌ◊✲ᡤࡘࡃࡤ୰ኸ◊✲ᡤࡼࡾ㈓◁ࢲ࣒

ࡲ࡛㐠ᦙࡋࡓ㸬⟶ᚄ200mmࡢ᤼◁⟶ࡢ㔜㔞ࡣ྾ᘬ㒊ࡀ

⣙200kg㸪⟶㊰㒊࡜࡞ࡿࢧࢡࢩ࣮ࣙࣥ࣍ࢫࡀ1ᮏ5㹫࡛

⣙50kg࡛࠶ࡾ㸪⟶ᚄ300mmࡢ྾ᘬ㒊ࡢ㔜㔞ࡣ700kg㸪

⟶㊰㒊࡜࡞ࡿࢧࢡࢩ࣮ࣙࣥ࣍ࢫࡀ1ᮏ4㹫࡛⣙60kg࡛

࠶ࡗࡓ㸬ࡇࢀࡽࢆࢡ࣮ࣞࣥࢆ⏝࠸࡚㈓◁ࢲ࣒ྑᓊഃ࠿ࡽ

㈓Ỉụෆ࡟ࡘࡾ㎸ࢇࡔ㸬ࡲࡓ㸪ᅗ-㸱࡟⟶ᚄ200mmࡢ᤼

◁ᐇ㦂⿦⨨ࡢ඲యᅗࢆ㸪ᅗ-㸲࡟ᐇ㦂⿦⨨ୗὶࡢヲ⣽ᅗ

ࢆ♧ࡍ㸬ୗὶ➃࡟࠾࠸࡚ࡣ㸪ὶ◁㔞ㄪᰝࡢࡓࡵ㸪ேຊ࡟

ࡼࡿᅵ◁᥇ྲྀࢆ⾜࠺࡜࡜ࡶ࡟㸪㟁☢ὶ㔞ィࢆタ⨨ࡋ㸪⟶

ෆὶ㏿ࢆィ 㸪ࡲࡓ㸪⟶ෆὶἣࢆ☜ㄆ࡛ࡁࡿ࢔ࢡࣜࣝࣃ

࢖ࣉ㸪ὶ㔞ㄪᩚྍ⬟࡞ࢤ࣮ࢺࣂࣝࣈࡶタࡅࡓ㸬ࡲࡓ㸪㈓

◁ࢲ࣒ࢆ๐Ꮝ࡛ࡁ࡞࠸ࡓࡵ㸪᤼◁⟶ࢆኳ➃࡟ᅛᐃࡋ㸪᤼

Ẽཱྀࢆタ⨨ࡋࡓୖ࡛┿✵࣏ࣥࣉ࡟ࡼࡾ✵Ẽࢆᢤ࠸࡚⟶ෆ

ࢆ‶Ỉ࡟ࡋࠊࢧ࢖ࣇ࢛ࣥࢆ฼⏝ࡋࡓ᤼◁⿦⨨࡜ࡋࡓ㸬 ሁ◁ࡢ⾲ᒙࢆㄪᰝࡋࡓ࡜ࡇࢁ㸪ⴠࡕⴥࡀྵࡲࢀ࡚࠸

ࡓࡶࡢࡢ㸪ᅗ-㸳ࡢ࡜࠾ࡾ㸪◁ศࡀ⣙㸶๭⛬ᗘࢆ༨ࡵ♟

ศࡸ⢓ᛶᅵࡀ࡯࡜ࢇ࡝࡞࠸ࡇ࡜ࡀࢃ࠿ࡗࡓ㸬ࡇࢀࡲ࡛ࡢ

▱ぢ࠿ࡽ⌧ᆅᅵ◁࡟࠾࠸࡚᤼◁ྍ⬟࡛࠶ࡿ࡜᝿ᐃࡉࢀࡓ㸬

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Ỉ఩ィ䠄䃥㻟㻜㻜㼙㼙ᐇ㦂᫬䠅 㻝ᅇ㻛⛊ ᤼◁⟶䛻䝢䜶䝌⟶䚸ᨵⰋᘧỈ఩ィ䜢タ⨨䛧䚸⟶ෆᅽ ຊศᕸ䜢ィ 䛧㻼㻯䛻グ㘓

䝬䝜䝯䞊䝍䠄䃥㻞㻜㻜㼙㼙ᐇ㦂᫬䠅 㐺᫬ ᤼◁⟶䛻䝢䜶䝌⟶䜢タ⨨䛧䚸㈓◁䝎䝮ୗὶ䛾䝬䝜 䝯䞊䝍䞊ᯈ䛷⟶ෆᅽຊศᕸ䜢෗┿䛻䜘䜚グ㘓䚸ィ  ὶ㔞ㄪᰝ 㟁☢ὶ㔞ィ 㻝ᅇ㻛⛊ ᤼◁⟶ୗὶ䛾㟁☢ὶ㔞ィ䛻䛚䛔䛶ィ 

᤼◁⟶㖄┤఩⨨ Ỉ఩ィ 㻝ᅇ㻛⛊ ྾ᘬ㒊ୖ㠃䛾ୖὶ䚸ୗὶ䚸ᕥᓊഃ䚸ྑᓊഃ䛾㻠⟠ᡤ 䛻ᑠᆺ䝯䝰䝸ᘧỈ఩ィ䜢タ⨨䛧䚸ᖹᆒ್䛷⟬ฟ

᤼◁⟶Ⲵ㔜ㄪᰝ 䝻䞊䝗䝉䝹 㻝ᅇ㻛⛊ 㻞㻡㼠䝷䝣䝍䞊䜽䝺䞊䞁䛻ྞ䜚ୗ䛢㒊䛻䢗䡬䢀䢚䡺䢕䜢㓄⨨

ィ 

ୖୗὶỈ఩ᕪ Ỉ఩ィ 㻝ᅇ㻛⛊ ㈓◁䝎䝮ୖୗὶ䛻ᑠᆺ䛾䝯䝰䝸ᘧỈ఩ィ䜢タ⨨䛧 ィ 

ὶἣㄪᰝ Ỉ୰䜹䝯䝷䚸䝡䝕䜸 㐃⥆᧜ᙳ 䜰䜽䝸䝹㒊䚸྾ᘬ㒊䚸ྤཱྀ㒊䜢䜹䝯䝷䚸䝡䝕䜸䛷᧜ᙳ ὶ◁㔞ㄪᰝ 䝯䝇䝅䝸䞁䝎䞊 㐺᫬ ᨺὶ䝞䝹䝤䛾ୗὶ䛷ᨺὶỈ䜢᥇Ỉ䛧䛶Ỉ䛸◁䜢䢎䡹䡸

䢔䢙䡼䢚䡬䛷ィ 

⃮ᗘㄪᰝ ⃮ᗘィ 㻝ᅇ㻛⛊ ᨺὶ⟶ୗὶ䛻⃮ᗘィ䜢タ⨨䛧䚸⃮ᗘ䠄㻺㼀㼁䠅䜢ィ  Ἑᗋኚືㄪᰝ 䝺䝧䝹 ^{㻞 ⥺㻛ᅇ}ᐇ㦂๓ᚋ䛷⦪᩿᪉ྥ䚸ᶓ᩿᪉ྥ䛻䝺䝧䝹䜢⏝䛔䛶

Ἑᗋᙧ≧䜢┤᥋ィ 

ᅵ◁⢏ᗘศᕸ 䠉 ^{㻝ᅇ㻛ሙᡤ}ᐇ㦂๓ᚋ䛻䚸྾ᘬ㒊タ⨨఩⨨࿘㎶䛷ᰕ≧᥇ྲྀ䛧䜅 䜛䛔ศ䛡ヨ㦂䛻䜘䜚ồ䜑䛯䚹

䝎䝮ὶධ㔞 䠉 䠍ᅇ㻛㻝᫬㛫 ༓ⴥ┴䜈䛾䝠䝲䝸䞁䜾䠄ୖὶ䛷䛾ὶ㔞ほ 䠅 ᅽຊㄪᰝ

⾲-㸰 ᐇ㦂ࢣ࣮ࢫ

ᐇ㦂䜿䞊䝇 ᤼◁⟶㛗 ᐇ᪋᪥ ᫬㛫 ᤼◁⟶ᚄ ᐇ᪋఩⨨

㻯㼍㼟㼑㻝 㻝㻡㼙 㻴㻞㻡㻚㻝㻝㻚㻞㻞 㻥㻦㻞㻣䡚㻝㻝㻦㻜㻡 䃥㻞㻜㻜㼙㼙 ㈓◁䝎䝮ྑᓊୖὶ㻝㻜㼙ᆅⅬ 㻯㼍㼟㼑㻞 㻞㻤㼙 㻴㻞㻢㻚㻝㻝㻚㻞㻤 㻝㻜㻦㻜㻜䡚㻝㻜㻦㻡㻣 䃥㻟㻜㻜㼙㼙 ㈓◁䝎䝮୰ኸୖὶ㻞㻜㼙ᆅⅬ 㻯㼍㼟㼑㻟 㻞㻤㼙 㻴㻞㻢㻚㻝㻝㻚㻞㻤 㻝㻝㻦㻟㻜䡚㻝㻞㻦㻞㻜 䃥㻟㻜㻜㼙㼙 ㈓◁䝎䝮ྑᓊୖὶ㻞㻜㼙ᆅⅬ 㻯㼍㼟㼑㻠 㻞㻜㼙 㻴㻞㻢㻚㻝㻝㻚㻞㻥 㻝㻜㻦㻜㻜䡚㻝㻝㻦㻜㻥 䃥㻟㻜㻜㼙㼙 ㈓◁䝎䝮ྑᓊୖὶ㻝㻞㼙ᆅⅬ 㻯㼍㼟㼑㻡 㻞㻜㼙 㻴㻞㻢㻚㻝㻝㻚㻞㻥 㻝㻟㻦㻞㻣䡚㻝㻡㻦㻞㻣 䃥㻟㻜㻜㼙㼙 ㈓◁䝎䝮୰ኸୖὶ䠍㻞㼙ᆅⅬ

⾲-㸯 ィ 㡯┠࡜ィ ᶵჾ㸪ィ 㢖ᗘ㸪ィ ᪉ἲ

࡚ᐇ㦂ࢆ㛤ጞࡋࡓ㸬᤼◁⟶ࡢᐇ⏝つᶍࡣ㸪௒ᅇࡢ᳨ウつ ᶍ௨ୖ࡜࡞ࡿ࡜⪃࠼ࡽࢀ㸪ᐇ⏝໬ࡢࡓࡵ࡟ࡣ㸪ྛ✀ࡢỈ

⌮㔞➼ࢆⓗ☜࡟ࣜ࢔ࣝࢱ࢖࣒࡛ᢕᥱࡋ࡚࠸ࡃࡇ࡜ࡀồࡵ

ࡽࢀࡿ࡜⪃࠼ࡽࢀࡿ㸬⟶ᚄ200mmࡢᐇ㦂࡛ࡣ㸪ࣜ࢔ࣝ

ࢱ࢖࣒࡛Ỉ⌮㔞➼ࢆᢕᥱ࡛ࡁࡎ㸪⌧ሙ࡛ࡣ᤼◁⟶ࡢゎᯒ ࡀ୙ྍ⬟࡛࠶ࡗࡓ㸬ࡇࡢࡓࡵ㸪⟶ᚄ300mm࡛ࡢᐇ㦂࡛

ࡣ㸪ὶ◁㔞௨እࡢ᤼◁⟶࡟┤᥋㛵ಀࡍࡿ㡯┠࡟ࡘ࠸࡚ࡣ㸪

㈓◁ࢲ࣒ୖὶ࡟ࢦ࣒࣮࣎ࢺࢆᾋ࠿࡭㸪᭷⥺࡟ࡼࡾ᝟ሗࢆ

㞟⣙ࡋ㸪ࢦ࣒࣮࣎ࢺ࠿ࡽ↓⥺LANࢆ⏝࠸࡚㸪ྑᓊࡢ

࣮ࣖࢻ࡬᝟ሗࢆ㏦ಙ㸪ࣃࢯࢥࣥୖ࡛᤼◁⟶ࡢᣲື➼ࡀ୍

┠࡛┘ど࡛ࡁࡿ௙⤌ࡳࢆᵓ⠏ࡋࡓ㸬࡞࠾㸪ὶ◁㔞ㄪᰝ࡟

ࡘ࠸࡚ࡣ㸪⟶ᚄ200mmࡢᐇ㦂࡛ࡣ㸪┤᥋ᨺὶỈࢆ᥇ྲྀ

ࡋ㸪ᅵ◁⃰ᗘࢆィ ࡋࡓࡀ㸪⟶ᚄ300mmࡢᐇ㦂つᶍ࡜

࡞ࡿ࡜㸪ヨᩱ᥇ྲྀࡀேຊ࡛ࡣᅔ㞴࡜࡞ࡿࡓࡵ㸪ᅗ-㸶࡟

♧ࡍࡼ࠺࡟᤼◁⟶ฟཱྀ㒊࡟ヨᩱ᥇ྲྀ⏝㓄⟶ࢆୖᒙ㸪୰ᒙ㸪 ᗏᒙࡢ㸱⟠ᡤ࡟㓄⨨ࡋ㸪ヨᩱࢧࣥࣉࣝ࠿ࡽᅵ◁⃰ᗘࢆィ  ࡍࡿࡇ࡜࡜ࡋࡓ㸬ලయⓗ࡟ࡣ㸪ࡲࡎ㸪㸱⟠ᡤ࡛ࡢ᥇ྲྀ

ヨᩱࡢỈ࡜ᅵ◁ࡢΰᅾẚ⋡ࢆồࡵ㸪ᚓࡽࢀࡓᅵ◁⃰ᗘࢆ

㸱ᒙࡢ᩿㠃✚ẚ⋡ࢆ⪃៖ࡋồࡵࡓ㸬

㸳㸬ᐇ㦂⤖ᯝ

ᐇ᪋ࡋࡓᐇ㦂ࢣ࣮ࢫࢆ⾲-㸰࡟♧ࡍ㸬ᮏሗ࿌࡛ࡣ

Case1㸪Case2 ࡢ㸰ࢣ࣮ࢫ࠿ࡽᚓࡽࢀࡓ▱ぢࢆሗ࿌ࡍࡿ㸬

Case1ࡣ⟶ᚄ200mmࡢ᤼◁⟶࡛ࡢᐇ㦂㸪Case2ࡣ⟶ᚄ

300mmࡢ᤼◁⟶࡛ࡢᐇ㦂࡛࠶ࡿ㸬

&DVH㸯

Case1ࡣ㸪㈓◁ࢲ࣒࠿ࡽୖὶ⣙10m㸪ྑᓊ௜㏆࡟྾ᘬ

㒊ࢆタ⨨ࡍࡿࢣ࣮ࢫ࡜ࡋ࡚ᐇ᪋ࡋࡓ㸬᤼◁⟶㛗ࡣ15m

࡛ᐇ᪋ࡋࡓ㸬ࡲࡓ㸪㐠⏝㠃࡛ࡢ▱ぢࢆᚓࡿࡇ࡜ࢆ┠ⓗ࡜

ࡋ࡚㸪ࡲࡎ㸪ୗὶࣂࣝࣈࢆ඲㛢࡟ࡋ࡚⟶ෆࡢὶࢀࢆ↓࠸

≧ែ࡟ࡋ㸪᤼◁⟶ࢆྞࡽ࡞࠸≧ែ࡛㸪྾ᘬ㒊ࢆሁ◁㠃࡟

タ⨨ࡋࡓᚋ㸪ୗὶࣂࣝࣈࢆ඲㛤࡟ࡋ࡚ᐇ㦂ࢆ㛤ጞࡋࡓ㸬 ᅗ-㸷࡟྾ᘬ㒊㖄┤఩⨨࡜ྞⲴ㔜ࡢ㛵ಀࢆ♧ࡍ㸬ᐇ㦂㛤 ጞ࠿ࡽ⣙15ศࡲ࡛ࡢ㛫ࡣ㸪྾ᘬ㒊㖄┤఩⨨ࡀᛴ⃭࡟ୗ

ࡀࡾึᮇἙᗋ㧗࠿ࡽ1.1m⛬ᗘࡲ࡛₯⾜ࡋࡓࡀ㸪✺↛㸪

྾ᘬ࣭᤼◁ࡀ೵Ṇࡋࡓ㸬ࡲࡓ㸪ᅗ࡟྾ᘬ㒊㖄┤఩⨨

࡜⟶ෆὶ㏿ࡢ㛵ಀࢆ♧ࡍ㸬඲యⓗ࡟⟶ෆὶ㏿ࡣ2.3m/s

⛬ᗘ࡟⥔ᣢࡉࢀࡿࡀ㸪ᐇ㦂㛤ጞ࠿ࡽ⣙15ศᚋ࡟㸪⟶ෆ ὶ㏿ࡀ୍᫬ⓗ࡟2.0m/s࡟పୗࡍࡿ⌧㇟ࡀࡳࡽࢀࡓ㸬ࡇ ࡢ᫬Ⅼ࡟࠾࠸࡚㸪ᅗ-㸱ࡢྲྀỈཱྀ࡟࠾࠸࡚ࡣ྾࠸㎸ࡳ 

ࡀⓎ⏕ࡋ㸪྾ᘬ㒊ࡣపୗࡋ࡞ࡃ࡞ࡗࡓࡇ࡜࠿ࡽ㸪྾ᘬ㒊

࡟࠾ࡅࡿ㛢ሰࡀ᥎ᐹࡉࢀࡓ㸬

ࡲࡓ㸪ᅗ࡟⟶ෆὶ㏿࡜ᅵ◁⃰ᗘࡢ㛵ಀࢆ♧ࡍ㸬 9:40㡭࡟᥇Ỉࡋࡓᅵ◁⃰ᗘࡀ⣙4%࡜࡞ࡗࡓࡀ㸪ᅵ◁⃰

ᅗ㸷 ྾ᘬ㒊㖄┤఩⨨࡜ྞⲴ㔜ࡢ㛵ಀ㸦&DVH㸧

ᅗ ⟶ෆὶ㏿࡜ᅵ◁⃰ᗘࡢ㛵ಀ㸦&DVH㸧

ᅗᐇ㦂๓ᚋࡢ⦪᩿Ἑᗋᙧ≧㸦&DVH㸧 ᅗ ྾ᘬ㒊㖄┤఩⨨࡜⟶ෆὶ㏿ࡢ㛵ಀ&DVH

ᅗᐇ㦂๓ᚋࡢᶓ᩿Ἑᗋᙧ≧㸦&DVH㸧 ᅗ ྾ᘬ㒊࡜⟶㊰㒊ࡢᦆኻಀᩘ&DVH㸧

ᗘࡢ㧗࠸᫬㛫࡟࠾࠸࡚ࡣ⟶ෆࡢὶ㏿ࡶపῶࡋ࡚࠸ࡿࡇ࡜

ࡀࢃ࠿ࡿ㸬ฟỈ᫬࡟ᩘ༓࠿ࡽᩘ୓m³ࡢᅵ◁ࢆ᤼ฟࡍࡿ

ࡇ࡜ࢆ᝿ᐃࡍࡿ࡜㸪ᅵ◁౪⤥タഛࡢᅵ◁⃰ᗘࡣ2㹼5%

⛬ᗘࡀᚲせ࡜⪃࠼࡚࠾ࡾ㸪ヨ㦂ࡢึᮇࡢᨺὶ࡟࠾࠸࡚㸪

┠ᶆ࡜ࡍࡿᅵ◁⃰ᗘࡀ☜ㄆ࡛ࡁࡓ㸬

ࡉࡽ࡟㸪᤼◁⟶ࡢ⟶㍈࡟ἢࡗ࡚ィ ࡋࡓ⟶ෆࡢࣆ࢚

ࢰỈ㢌ࡢศᕸ࠿ࡽ㸪య✚ᅵ◁⃰ᗘ࡜྾ᘬ㒊ࡢୗὶ⟶㸪྾

ᘬ㒊ࡢࣆ࢚ࢰỈ㢌ࡢᅽຊపୗ໙㓄ࢆ⏝࠸࡚ồࡵࡓ࢚ࢿࣝ

ࢠ࣮ᦆኻಀᩘࡢ㛵ಀࢆᅗ࡟♧ࡍ㸬྾ᘬ㒊ࡼࡾୗὶࡢ

⟶㊰㒊ࡢ࢚ࢿࣝࢠ࣮ᦆኻಀᩘࡢ⟬ᐃ࡟ࡣ㸪௨ୗࡢᘧࢆ⏝

࠸ࡓ㸬

2

2 V g L

D

f h^L

ࡇࡇ࡛㸪f 㸸྾ᘬ㒊ୗὶࡢ࢚ࢿࣝࢠ࣮ᦆኻಀᩘ㸪hL㸸 ᅽຊᦆኻỈ㢌(m)㸪D㸸⟶ᚄ(m)㸪g 㸸㔜ຊຍ㏿ᗘ(m/s²)㸪

L㸸⟶㛗(m)㸪V㸸⟶ෆᖹᆒὶ㏿(m/s)ࢆ⾲ࡍ㸬

ࡲࡓ㸪྾ᘬ㒊࡟࠾ࡅࡿ࢚ࢿࣝࢠ࣮ᦆኻಀᩘࡢ⟬ᐃ࡟

ࡣ㸪௨ୗࡢᘧࢆ⏝࠸ࡓ㸬

2

2 V h g

f_{B B}

ࡇࡇ࡛㸪fB 㸸྾ᘬ㒊ࡢ࢚ࢿࣝࢠ࣮ᦆኻಀᩘ㸪hB㸸྾

ᘬ㒊ࡢᅽຊᦆኻỈ㢌(m)ࢆ⾲ࡍ㸬

⟶㊰㒊ࡢ࢚ࢿࣝࢠ࣮ᦆኻಀᩘࡣ0.06௨ୗ࡛࠶ࡿࡀ㸪 ᐇ㦂㛤ጞ࠿ࡽᅵ◁⃰ᗘࡀ㧗࠿ࡗࡓ9:40㡭࡟㧗࠸ᦆኻಀ

ᩘࡢ್ࡀ♧ࡉࢀࡓ㸬ࡲࡓ㸪྾ᘬ㒊࡛ࡣ㸪ᐇ㦂㛤ጞ࠿ࡽ

9:40㡭ࡲ࡛ࡢ㛫㸪ᦆኻಀᩘࡀ㸰⛬ᗘ࡜኱ࡁࡃ࡞ࡗ࡚࠸

ࡓ㸬

ᅗ࠾ࡼࡧᅗ࡟ᐇ㦂๓ᚋࡢ⦪ᶓ᩿ࡢἙᗋᙧ≧ࢆ

♧ࡍ㸬྾ᘬ㒊఩⨨ࢆ୰ᚰ࡟ࠊ⣙1.1mࡢ῝ࡉࡢࡍࡾ㖊ᙧ

≧ࡢἙᗋࡀᙧᡂࡉࢀ㸪᪤ ࡢᐊෆᐇ㦂ࡢ⤖ᯝࢆ࡯ࡰ෌⌧

࡛ࡁࡓ㸬᤼ฟᅵ◁㔞㸦✵㝽㎸ࡳ㸧࡛⣙5.5m³ࡢᅵ◁ࢆ᤼

ฟࡍࡿࡇ࡜ࡀ࡛ࡁࡓ㸬࡞࠾㸪ࡇࡢᐇ㦂࡛ࡶ྾ᘬ㒊ࡢ඲࡚

ࡀᅵ◁࡟ᇙἐࡍࡿࡇ࡜ࡣ↓࠿ࡗࡓ㸬

ᐇ㦂ᚋ㸪྾ᘬ࣭᤼◁ࡢ೵Ṇཎᅉࢆ≉ᐃࡍࡿࡓࡵ㸪㧗

ࢲ࣒⟶⌮஦ົᡤ࡬ࡢࣄࣖࣜࣥࢢࢆ⾜࠺࡜࡜ࡶ࡟㸪ሁ✚

ᅵ◁ࡢᰕ≧ࢧࣥࣉࣜࣥࢢㄪᰝࢆᐇ᪋ࡋࡓ㸬㈓◁ࢲ࣒࡟࠾

ࡅࡿ2ᖺ࡟1ᗘࡢ᤼◁ᕤ஦ࡢ᥀๐Ἑᗋ㧗࡜ᰕ≧ࢧࣥࣉࣜ

ࣥࢢㄪᰝ࠿ࡽᴫࡡ྾ᘬ㒊ࡀ೵Ṇࡋࡓ఩⨨࡟ཌࡉ10cm⛬ ᗘࡢⴥࡢᒙ㸦ⴥࡀ㔜ᒙⓗ࡟㔜࡞ࡾྜࡗ࡚ᅛ⤖ࡋ࡚࠸ࡿ≧

ែ㸧ࡀᗈࡃศᕸࡋ࡚࠸ࡿࡇ࡜ࡀุࡗࡓ㸬྾ᘬ೵Ṇ఩⨨࡜

ࡇࢀࡽࡢ఩⨨㛵ಀࢆᅗ࡟ᩚ⌮ࡋࡓ࡜ࡇࢁ㸪྾ᘬ೵Ṇ

఩⨨㸪ⴥࡢᒙ㸪᥀๐Ἑᗋࡢ㧗ࡉࡀ࡯ࡰ୍⮴ࡋࡓࡇ࡜࠿ࡽ㸪

྾ᘬ㒊ࡀⴥࡢᒙ࡟฿㐩ࡋ㸪྾ᘬ࣭᤼◁ࡀ೵Ṇࡋࡓࡶࡢ࡜

⪃࠼ࡽࢀࡓ㸬

ࡇࡢࡼ࠺࡟㸪ሻⰰ➼ࡢ㞟✚ࡢ≧ἣ࡟ࡼࡗ࡚㸪྾ᘬ࣭

᤼◁ࡀ೵Ṇࡍࡿ᤼◁⟶㛤Ⓨࡢㄢ㢟ࡀ᫂ࡽ࠿࡜࡞ࡾ㸪ᐇ⏝

㻜㻚㻜 㻜㻚㻡 㻝㻚㻜 㻝㻚㻡 㻞㻚㻜 㻞㻚㻡 㻟㻚㻜

㻙㻝㻚㻞 㻙㻝㻚㻜 㻙㻜㻚㻤 㻙㻜㻚㻢 㻙㻜㻚㻠 㻙㻜㻚㻞 㻜㻚㻜 㻜㻚㻞

㻥㻦㻞㻣 㻥㻦㻠㻝 㻥㻦㻡㻡 㻝㻜㻦㻝㻜 㻝㻜㻦㻞㻠 㻝㻜㻦㻟㻥 㻝㻜㻦㻡㻟 㻝㻝㻦㻜㻣

⟶ෆὶ㏿㸦PV㸧

྾ᘬ㒊㖄┤఩⨨P

᫬้ KP

྾ᘬ㒊㖄┤఩⨨

⟶ෆὶ㏿

㻜 㻡㻜 㻝㻜㻜 㻝㻡㻜 㻞㻜㻜 㻞㻡㻜 㻟㻜㻜 㻟㻡㻜

㻙㻝㻚㻞 㻙㻝㻚㻜 㻙㻜㻚㻤 㻙㻜㻚㻢 㻙㻜㻚㻠 㻙㻜㻚㻞 㻜㻚㻜 㻜㻚㻞

㻥㻦㻞㻣 㻥㻦㻠㻝 㻥㻦㻡㻡 㻝㻜㻦㻝㻜 㻝㻜㻦㻞㻠 㻝㻜㻦㻟㻥 㻝㻜㻦㻡㻟 㻝㻝㻦㻜㻣

ྞⲴ㔜㸦NJI㸧

྾ᘬ㒊㖄┤఩⨨P

᫬้ KP

྾ᘬ㒊㖄┤఩⨨

ྞⲴ㔜

㻟㻥㻚㻡 㻠㻜㻚㻜 㻠㻜㻚㻡 㻠㻝㻚㻜 㻠㻝㻚㻡

㻢㻚㻡 㻣㻚㻡 㻤㻚㻡 㻥㻚㻡 㻝㻜㻚㻡 㻝㻝㻚㻡 㻝㻞㻚㻡

ᶆ㧗㸦$3㸦㹫㸧㸧

㈓◁ࢲ࣒ୖὶ㠃࠿ࡽࡢ㊥㞳 P ᐇ㦂๓ ᐇ㦂ᚋ

㻟㻥㻚㻡 㻠㻜㻚㻜 㻠㻜㻚㻡 㻠㻝㻚㻜 㻠㻝㻚㻡

㻣㻚㻜 㻣㻚㻡 㻤㻚㻜 㻤㻚㻡 㻥㻚㻜 㻥㻚㻡 㻝㻜㻚㻜 㻝㻜㻚㻡 㻝㻝㻚㻜 㻝㻝㻚㻡

ᶆ㧗$3P

ྑᓊ࠿ࡽࡢ㊥㞳 P

ᐇ㦂๓ ᐇ㦂ᚋ ྾ᘬ㒊೵Ṇ఩⨨

ⴥ䛾ᒙ ᥀๐Ἑᗋ㧗

㻜㻚㻜 㻝㻚㻜 㻞㻚㻜 㻟㻚㻜 㻠㻚㻜 㻡㻚㻜

㻞㻚㻜 㻞㻚㻝 㻞㻚㻞 㻞㻚㻟 㻞㻚㻠 㻞㻚㻡

㻥㻦㻞㻣 㻥㻦㻠㻝 㻥㻦㻡㻡 㻝㻜㻦㻝㻜 㻝㻜㻦㻞㻠 㻝㻜㻦㻟㻥 㻝㻜㻦㻡㻟 㻝㻝㻦㻜㻣

ᅵ◁⃰ᗘ㸣

⟶ෆὶ㏿PV

᫬้㸦KP

⟶ෆὶ㏿

ᅵ◁⃰ᗘ

㻜㻚㻜㻜 㻜㻚㻜㻞 㻜㻚㻜㻠 㻜㻚㻜㻢 㻜㻚㻜㻤

㻜㻚㻜㻜 㻝㻚㻜㻜 㻞㻚㻜㻜 㻟㻚㻜㻜 㻠㻚㻜㻜

㻥㻦㻞㻣 㻥㻦㻠㻝 㻥㻦㻡㻡 㻝㻜㻦㻝㻜 㻝㻜㻦㻞㻠 㻝㻜㻦㻟㻥 㻝㻜㻦㻡㻟 㻝㻝㻦㻜㻣

ᦆኻಀᩘ㸦⟶㊰㒊㸧f

ᦆኻಀᩘ㸦྾ᘬ㒊㸧fB

᫬้㻔㼔㻦㼙㻕 ᦆኻಀᩘ䠄྾ᘬ㒊䠅

ᦆኻಀᩘ䠄྾ᘬ㒊䜘䜚ୗὶ ⟶㊰㒊䠅

໬࡟࠶ࡓࡗ࡚ࡣ㸪 ሻⰰ➼ࡢᐦ㞟ᗘ࡟ᛂࡌࡓ᤼◁⟶ࡢ㐺

⏝⠊ᅖࢆ᫂☜࡟ࡍࡿᚲせࡀ࠶ࡿ࡜⪃࠼ࡽࢀࡓ㸬

&DVH

Case2ࡣ㸪᤼◁⟶㛗28m㸪྾ᘬ㒊ࢆ㈓◁ࢲ࣒࠿ࡽୖ

ὶ⣙20mࡢἙ㐨୰ኸ௜㏆࡟タ⨨ࡍࡿࢣ࣮ࢫ࡜ࡋ࡚ᐇ᪋

ࡋࡓ㸬

ࡇࡇ࡛ࡣ㸪᤼◁⟶ࡢỈ⌮≉ᛶ࡟㛵ࡍࡿ▱ぢࢆᚓࡿࡇ

࡜ࢆ┠ⓗ࡜ࡋ࡚㸪ࡲࡎ㸪྾ᘬ㒊ࢆἙᗋ࡟╔ᗏࡋ࡞࠸ࡼ࠺

࡟ࣛࣇࢱ࣮ࢡ࣮࡛ࣞࣥỈ୰࡟㓄⨨࡛ࡁࡿࡼ࠺࡟ྞࡾୖࡆ ࡓୖ࡛㸪ୗὶࡢࣂࣝࣈࢆ඲㛤࡜ࡋ㸪ΎỈ᫬ࡢ⟶ෆỈ⌮㔞

ࢆィ 㸪ࡑࡢᚋ㸪ྞࡗ࡚࠸ࡿ྾ᘬ㒊ࢆୗࢁࡋ࡚ሁ◁࡟╔

ᗋࡉࡏ㸪ྞࡾⲴ㔜ࡀ↓Ⲵ㔜࡜࡞ࡗࡓ᫬Ⅼࢆ㛤ጞ᫬้࡜ࡋ

࡚ᐇ㦂ࢆᐇ᪋ࡋࡓ㸬

ᅗ࡟྾ᘬ㒊㖄┤఩⨨࡜ྞⲴ㔜ࡢ㛵ಀࢆ♧ࡍ㸬ึᮇ Ἑᗋࢆᇶ‽㸦0m㸧࡜ࡋ࡚࠾ࡾ㸪྾ᘬ㒊╔ᗏ┤ᚋࡣ㸪ᛴ

⃭࡟྾ᘬ㒊ࡀ₯⾜ࡋࡓࡀ㸪10:05㡭࡟࠾࠸࡚㸪₯⾜㏿ᗘ ࡀ㐜ࡃ࡞ࡿࡶࡢࡢ㸪୍ᐃࡢ㏿ᗘ࡛₯⾜ࡣ⥅⥆ࡋࡓ㸬ᐇ㦂

⤊஢᫬ࡢ11㸸00㡭࡟ࡣ⣙1.5m⛬ᗘࡲ࡛₯⾜ࡋࡓࡀ㸪

ᐇ㦂ࡢᕤ⛬ࡢ㒔ྜୖ㸪྾ᘬ㒊ࢆྞࡾୖࡆ㸪ᐇ㦂ࢆ⤊஢ࡋ ࡓ㸬

ᅗ࡟྾ᘬ㒊㖄┤఩⨨࡜⟶ෆὶ㏿ࡢ㛵ಀࢆ♧ࡍ㸬྾

ᘬ㒊ࡀᛴ⃭࡟₯⾜ࡋࡓᐇ㦂ึᮇ࡟࠾࠸࡚ࡣ⟶ෆὶ㏿ࡀ 2.2m/s⛬ᗘࡲ࡛ୗࡀࡗࡓᚋ࡟㸪10:05㡭࡟2.4m/s⛬ᗘࡲ

࡛ᅇ᚟㸪10:20㡭࡟෌ᗘ2.2m/s⛬ᗘࡲ࡛ୗࡀࡿ࡞࡝㸪 Case㸯࡜ẚ㍑ࡋ࡚㸪୙Ᏻᐃ࡞⟶ෆὶ㏿ࡢືࡁ࡜࡞ࡗ࡚࠸

ࡿ㸬౛࠼ࡤ㸪10:05㡭࡟྾ᘬ㒊ࡢ㝆ୗ㏿ᗘࡀపῶࡋ㸪⟶

ෆὶ㏿ࡀᅇ᚟ࡋ࡚࠸ࡿ㸪10:20㡭࡟ࡣ㝆ୗ㏿ᗘࡀ㧗ࡃ࡞

ࡾ㸪⟶ෆὶ㏿ࡀపୗࡋ࡚࠸ࡿ࡜࠸ࡗࡓࡇ࡜ࡀぢཷࡅࡽࢀ㸪

⟶ෆࡢᅵ◁ὶୗࡢ≧ἣ࡟ࡼࡗ࡚ὶ㏿ࡀኚ໬ࡋ࡚࠸ࡿ࡜ࡶ

⪃࠼ࡽࢀ㸪ࡉࡽ࡞ࡿヲ⣽࡞ㄪᰝࡀᚲせ࡛࠶ࡿ࡜⪃࠼࡚࠸

ࡿ㸬࡞࠾㸪ΎỈ᫬ࡢᖹᆒ⟶ෆὶ㏿ࡣ2.45m/s࡛࠶ࡗࡓ㸬 ᅗ࡟⟶ෆὶ㏿࡜ᅵ◁⃰ᗘࡢ᫬⣔ิኚ໬ࡢ㛵ಀࢆ♧

ࡍ㸬ࡇࡇ࡛ࡣ๓㏙ࡢᡭἲ࡟ࡼࡾᅵ◁⃰ᗘࢆィ ࡋࡓ㸬ࡋ

࠿ࡋ㸪ᐇ㦂┤ᚋ࡟⟶ᗏ㒊ࢆὶୗࡍࡿᅵ◁࡟ࡼࡾヨᩱ᥇ྲྀ

⏝㓄⟶ࡀ㛢ሰࡋ㸪ᗏᒙ࡛ࡢ᥇ྲྀࡀᅔ㞴࡜࡞ࡾ㸪10:10㡭

࡟ࡣ୰ᒙࡶྠᵝ࡟㛢ሰࡀ⏕ࡌ࡚᥇ྲྀᅔ㞴࡜࡞ࡗࡓ㸬ࡇࡢ ࡓࡵ㸪ヨᩱ᥇ྲྀ᪉ἲࡀ᫬㛫࡟ࡼࡾ␗࡞ࡿࡀ㸪ᅵ◁⃰ᗘࡢ ኚ໬ࡢഴྥࡢࡳ࡟╔┠ࡍࡿ࡜㸪10:05㡭ࡢ⟶ෆὶ㏿ࡀప ῶࡍࡿ᫬㛫࡟࠾࠸࡚㸪పᒙࡣḞ ࡋ࡚࠸ࡿࡀ㸪ᅵ◁ࡢ⃰

ᗘࡀ㸰㸣⛬ᗘ࡜࡞ࡾ㸬ᴫࡡᅵ◁⃰ᗘࡀୖ᪼ࡍࡿ࡜⟶ෆὶ

㏿ࡶపୗࡋ࡚࠸ࡿࡇ࡜ࡀఛ࠼ࡿ㸬ࡇࡢࡇ࡜࠿ࡽ㸪Case1

࡜ྜࢃࡏ࡚ࡶ⟶ෆὶ㏿࡜ᅵ◁⃰ᗘࡣ┦㛵㛵ಀࢆ᭷ࡋ࡚࠸

ࡿ࡜⪃࠼ࡽࢀࡿ㸬

ࡇࡢᒙูࡢᅵ◁⃰ᗘࡢィ ᪉ἲ࡟ࡼࡗ࡚㸪ᅵ◁⃰ᗘ ࡀኚ໬ࡍࡿഴྥࢆᢕᥱ࡛ࡁࡓࡀ㸪ᕧ♟ࡢィ ࡸᗏᒙ㒊࡟

ᅵ◁ࡢᒙࡀሁ✚ࡋࡓሙྜ࡞࡝ࠊィ ᪉ἲ࡜ࡋ࡚୙༑ศ࡛

࠶ࡿ࡜࠸࠼㸪௒ᚋ㸪᥇ྲྀ᪉ἲࢆྵࡵࡓᅵ◁⃰ᗘࡢィ ᡭ ἲࡢ㛤Ⓨࡀᚲせ࡛࠶ࡿ࡜⪃࠼࡚࠸ࡿ㸬

Case1࡜ྠᵝ࡟ᐇ㦂࡛ᚓࡽࢀࡓ⟶ෆᅽຊཬࡧ⟶ෆὶ㏿

࠿ࡽࢧࢡࢩ࣮ࣙࣥ࣍ࢫࡢᦶ᧿ᦆኻಀᩘཬࡧ྾ᘬ㒊ࡢ᭤ࡾ

ᦆኻಀᩘࢆ⟬ᐃࡋ㸪ᚓࡽࢀࡓᦆኻಀᩘࡢ᫬⣔ิኚ໬ࢆᅗ ࡟♧ࡍ㸬ᐇ㦂๓ࡢΎỈ᫬ࡢᦶ᧿ᦆኻಀᩘf࡜᭤ࡾᦆ ኻಀᩘfBࡢᖹᆒ್ࡣ㸪f=0.026㸪fB=1.28࡛࠶ࡗࡓࡀ㸪fࡣ ΎỈ᫬࡟ᑐࡋ᤼◁᫬ࡢᦆኻಀᩘࡀୖ᪼ࡍࡿഴྥ࡜࡞ࡗࡓ ࡀ㸪fBࡣ཯ᑐ࡟పୗࡍࡿഴྥࢆ♧ࡋࡓཎᅉ࡟ࡘ࠸࡚㸪ࡉ

ࡽ࡞ࡿㄪᰝࢆ㐍ࡵ࡚ࡲ࠸ࡾࡓ࠸㸬

ᐇ㦂๓ᚋࡢἙᗋᙧ≧ィ ⤖ᯝࢆᅗ-19㸪ᅗ-20࡟♧ࡍ㸬

┤ᚄ4m㸪῝ࡉ1.0m⛬ᗘࡢ᤼◁㠃ࡀᙧᡂࡉࢀ㸪ࡇࡢ᤼

◁㠃ᙧ≧࠿ࡽࢆồࡵࡿ࡜᤼◁㔞(✵㝽㎸ࡳ)࡛8.3m³࡛࠶

ࡿ㸬

ᅗ⟶ෆὶ㏿࡜ᅵ◁⃰ᗘࡢ㛵ಀ㸦&DVH㸧 ᅗ྾ᘬ㒊㖄┤఩⨨࡜ྞⲴ㔜ࡢ㛵ಀ㸦&DVH㸧

ᅗ྾ᘬ㒊㖄┤఩⨨࡜⟶ෆὶ㏿ࡢ㛵ಀ&DVH

ᅗ ྾ᘬ㒊࡜⟶㊰㒊ࡢᦆኻಀᩘ&DVH㸧 0.0 1.0 2.0 3.0 4.0

2.00 2.25 2.50 2.75 3.00

㻝㻜㻦㻜㻜 㻝㻜㻦㻝㻡 㻝㻜㻦㻟㻜 㻝㻜㻦㻠㻡 㻝㻝㻦㻜㻜

ᅵ◁⃰ᗘ㸣

⟶ෆὶ㏿㸦㹫㸭㹱㸧

᫬้KP

⟶ෆὶ㏿

ᅵ◁⃰ᗘ ᅵ◁⃰ᗘ䠄పᒙḞ 䠅 ᅵ◁⃰ᗘ䠄୰䚸ᗏᒙḞ 䠅

0.00 0.02 0.04 0.06 0.08

0.0 0.5 1.0 1.5 2.0

㻝㻜㻦㻜㻜 㻝㻜㻦㻝㻡 㻝㻜㻦㻟㻜 㻝㻜㻦㻠㻡 㻝㻝㻦㻜㻜

ᦆኻಀᩘ㸦⟶㊰㒊㸧f

ᦆኻಀᩘ㸦྾ᘬ㒊㸧fB

᫬้KP ᦆኻಀᩘ䠄྾ᘬ㒊䠅

ᦆኻಀᩘ䠄྾ᘬ㒊䜘䜚ୗὶ ⟶㊰㒊䠅 ΎỈ᫬f=1.28䠄྾ᘬ㒊䠅

ΎỈ᫬f=0.026䠄⟶㊰㒊䠅

0 100 200 300 400 500 600 700 800 900

Ͳ1.6 Ͳ1.4 Ͳ1.2 Ͳ1.0 Ͳ0.8 Ͳ0.6 Ͳ0.4 Ͳ0.2 0.0 0.2

㻝㻜㻦㻜㻜 㻝㻜㻦㻝㻡 㻝㻜㻦㻟㻜 㻝㻜㻦㻠㻡 㻝㻝㻦㻜㻜

ྞⲴ㔜.JI

྾ᘬ㒊㖄┤఩⨨P

᫬้KP

྾ᘬ㒊㖄┤఩⨨

ྞⲴ㔜

1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8

Ͳ1.6 Ͳ1.4 Ͳ1.2 Ͳ1.0 Ͳ0.8 Ͳ0.6 Ͳ0.4 Ͳ0.2 0.0 0.2

㻝㻜㻦㻜㻜 㻝㻜㻦㻝㻡 㻝㻜㻦㻟㻜 㻝㻜㻦㻠㻡 㻝㻝㻦㻜㻜

⟶ෆὶ㏿PV

྾ᘬ㒊㖄┤఩⨨P

᫬้KP

྾ᘬ㒊㖄┤఩⨨

⟶ෆὶ㏿

ᅗᐇ㦂๓ᚋࡢᶓ᩿Ἑᗋᙧ≧㸦&DVH㸧

㻌

ᅗᐇ㦂๓ᚋࡢ⦪᩿Ἑᗋᙧ≧㸦&DVH㸧

㻌

ࡲࡓ㸪ᅗ࡟᤼◁⟶࡟┤᥋㛵ಀࡍࡿࢹ࣮ࢱࢆࣜ࢔ࣝ

ࢱ࢖࣒࡛ࣃࢯࢥࣥୖ࡟࠾࠸࡚⾲♧࡛ࡁࡿࢩࢫࢸ࣒ࢆᵓ⠏

ࡋࡓ⏬㠃ࢆ♧ࡍ㸬ࡇࢀ࡟ࡼࡾ㸪ᐇ㦂᫬࡟Ỉ୰࡟₯⾜ࡋ┠

どࡀᅔ㞴࡜࡞ࡗ࡚ࡋࡲ࠺᤼◁⟶ࡢᣲື➼ࡀ୍┠࡛☜ㄆ࡛

ࡁࡿࡼ࠺࡟࡞ࡾ㸪ࢫ࣒࣮ࢬ࡟ᐇ㦂ࢆ⾜࠺ࡇ࡜ࡀ࡛ࡁࡓ㸬

ࡲࡓ㸪ᅗ࡟Case2ࡢỈ⌮㔞➼ࡢ᝟ሗࢆ୍⏬㠃ୖ࡛࢔

ࢽ࣓࣮ࢩࣙࣥࡸື⏬ࢆ⏝࠸࡚ࢃ࠿ࡾࡸࡍࡃ⾲♧ࡍࡿ⏬㠃

ࢆ♧ࡍ㸬ࡇࢀࢆά⏝ࡍࢀࡤ㸪ᅵ◁ࡢὶୗ≧ἣ㸪྾ᘬ㒊ࡢ ᣲື➼ࢆྠ᫬࡟☜ㄆ࡛ࡁ㸪₯⾜྾ᘬᘧ᤼◁⟶ࡢᣲື➼ࡢ

┘ど࣭ศᯒࡀᐜ᫆࡜࡞ࡾࠊࡇࡢࡼ࠺࡞ࢩࢫࢸ࣒ࡢᵓ⠏ࡣ㸪 ᐇ⏝໬࡟ྥࡅ࡚᭷⏝࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿ㸬

㸴㸬࠾ࢃࡾ࡟

ᮏሗ࿌ࡣ㸪ሻⰰࡸ⢓ᛶᅵࢆከᑡྵࡴᐇ㝿ࡢࢲ࣒ሁ◁

ࢆᑐ㇟࡜ࡋࡓ⟶ᚄ200mm㸪300mmࡢ₯⾜྾ᘬᘧ᤼◁⟶

࡟ࡼࡿ⌧ᆅ᤼◁ᐇ㦂ࡢ⤖ᯝࡢ୍㒊ࢆሗ࿌ࡋࡓࡶࡢ࡛࠶ࡿ㸬 ලయⓗ࡟ࡣ㸪

1)⣙1.6m࡜ẚ㍑ⓗᑠࡉ࡞ⴠᕪ᮲௳ୗ࡛ࡶࠊ㈓◁ࢲ࣒

ୖὶ⣙20mᆅⅬࡢሁ◁ࢆ₯⾜྾ᘬᘧ᤼◁⟶ࢆ⏝࠸

ࢀࡤ㸪Ỉ㢌ᕪ࢚ࢿࣝࢠ࣮ࡔࡅ࡛㐃⥆ⓗ࡟㈓◁ࢲ࣒

ୗὶ࡬ᅵ◁౪⤥࡛ࡁࡿࡇ࡜ࢆ᫂ࡽ࠿࡜ࡋࡓ㸬 2)᤼◁᫬ࡢ⟶ෆὶ㏿࡜ᅵ◁⃰ᗘ࡟ࡣ┦㛵㛵ಀࡀ࠶ࡿ࡜

࠸ࡗࡓᐇ⏝໬࡟ྥࡅ࡚ཧ⪃࡜࡞ࡿ₯⾜྾ᘬᘧ᤼◁

⟶ࡢ」㞧࡞Ỉ⌮≉ᛶࡢ≉ᚩࢆ᫂ࡽ࠿࡟ࡋࡓ㸬 3)₯⾜྾ᘬᘧ᤼◁⟶ࡢ⌧ሙ࡛ࡢタ⨨࣭᧔ཤ࡟࠾࠸࡚኱

ࡁ࡞ၥ㢟ࡣ࡞ࡃ㸪ẚ㍑ⓗ⡆౽࡟⾜࠺ࡇ࡜ࡀ࡛ࡁࡓ㸬 4)₯⾜྾ᘬᘧ᤼◁⟶ࡢྛ✀Ỉ⌮㔞➼ࢆ෇⁥㸪Ᏻ඲㸪ⓗ

☜࡟ࣜ࢔ࣝࢱ࢖࣒࡛ᢕᥱ࡛ࡁࡿ௙⤌ࡳࢆ᳨ウ࣭ᵓ

⠏ࡍࡿ࡜࡜ࡶ࡟ࠊࡑࡢィ ᝟ሗࢆ୍ࡘࡢ⏬㠃࡟୍

ඖ໬ࠊ୍┠࡛ࢃ࠿ࡾࡸࡍࡃࡍࡿࡇ࡜࡟ࡼࡗ࡚ࠊ₯

⾜྾ᘬᘧ᤼◁⟶ࡢỈ⌮㔞➼ࢆ┘ど࣭ศᯒ࡛ࡁࡿࠊ ᐇ⏝໬࡟ྥࡅ࡚᭷⏝࡞௙⤌ࡳࢆ᳨ウ࣭ᵓ⠏ࡋࡓ㸬 5)⟶ෆ㛢ሰ➼ࡢᣦᶆ࡜࡞ࡿ࡜⪃࠼ࡽࢀࡿᅵ◁⃰ᗘࡢィ

 ᡭἲࡢ㛤Ⓨࡢᚲせᛶࡀ᫂ࡽ࠿࡜࡞ࡗࡓ㸬

₯⾜྾ᘬᘧ᤼◁⟶ࢆ⏝࠸ࡓᢏ⾡ࡀࢲ࣒ࡢ᤼◁ᢏ⾡࡜

ࡋ࡚ຠ⋡ⓗ࡛ຠᯝⓗ࡞ᢏ⾡࡜࡞ࡿྍ⬟ᛶࡀ୍ᐃ⛬ᗘ☜ㄆ ࡉࢀࡓࡶࡢࡢ㸪ࢣ࣮ࢫ࡟ࡼࡗ࡚ࡣሻⰰ➼ࡢ㞟✚ࡢ≧ἣ࡟

ࡼࡗ࡚㸪྾ᘬ࣭᤼◁ࡀ೵Ṇࡍࡿ⌧㇟ࡶㄆࡵࡽࢀ㸪ᐇ⏝໬

࡟ྥࡅ࡚㸪ࡉࡽ࡞ࡿ᳨ウࡀᚲせ࡛࠶ࡿ࡜⪃࠼࡚࠸ࡿ㸬 ㅰ㎡㸸ᐇ㦂࡟ࡈ༠ຊ࠸ࡓࡔ࠸ࡓ༓ⴥ┴Ἑᕝᩚഛㄢ㸪༓ⴥ

┴ᕷཎᅵᮌ஦ົᡤ㸪༓ⴥ┴㧗ࢲ࣒⟶⌮஦ົᡤ㸪ຍⱱᅵ ᆅᨵⰋ༊㸪㣴⪁ᕝ⁺ᴗ༠ྠ⤌ྜࡢⓙᵝ࡟ㅰពࢆ⾲ࡋࡲࡍ㸬

ཧ⪃ᩥ⊩

1) Miyakawa,M. , Hakoishi,N. and Sakurai,T. :Development of the Sediment Removal Suction Pipe by Laboratory and Field Experiments, Dams and Reservoirs under changing Challenges

"82th Annual Meeting of ICOLD 2014",pp.V-15-V-24,

International Commission on Large Dams , Bali , Indonesia. 2014.

2)Ḉ஭ᑑஅ࣭⟽▼᠇᫛㸸₯⾜྾ᘬᘧ᤼◁⟶ࡢ⌧ᆅ᤼◁

ᐇ㦂㸪ᅵᮌᏛ఍ㄽᩥ㞟 %ỈᕤᏛ㸪9RO㸪 1RSSϨBϨB㸪

3)ᐑᕝோ㸪ᐑ⬥༓ᬕ㸪Ḉ஭ᑑஅ㸪⟽▼᠇᫛₯⾜྾ᘬᘧ

᤼◁⟶࡟ࡼࡿࢲ࣒㈓Ỉụෆ࡟࠾ࡅࡿ᤼◁ᐇ㦂㸪ᅵᮌᏛ

఍➨ ᅇᖺḟᏛ⾡ᴫせ㞟㸪ϩ㸪SS㹼㸪

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ᅗ᤼◁⟶ࡢ≧ἣࢆ⾲♧ࡋࡓ⏬㠃

39.0 39.5 40.0 40.5 41.0 41.5

0.0 2.0 4.0 6.0 8.0 10.0

ᶆ㧗㸦㸿㹎㸦㹫㸧㸧

ྑᓊ⟶⌮㐨㊰࠿ࡽࡢ㊥㞳 P ᐇ㦂๓ ᐇ㦂ᚋ 39.0

39.5 40.0 40.5 41.0 41.5

14.0 16.0 18.0 20.0 22.0

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㈓◁ࢲ࣒ኳ➃࠿ࡽࡢ㊥㞳 P ᐇ㦂๓ ᐇ㦂ᚋ

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