北海道地区自然災害科学資料センター報告
Vol.33, 3-14, 20202018 ᖺ໭ᾏ㐨⫹᣺ᮾ㒊ᆅᆅ㟈࡟ࡼࡿᆅ┙⅏ᐖ஦౛Case Report of Grround Disasterr due to The 2018
8 Hokkaido Eastern
Iburi earthquakeᮌᖭ ⾜ᏹ 1࣭Ώ㒊 せ୍ 21㸪ᐊ⹒ᕤᴗ኱Ꮫ኱Ꮫ㝔ᕤᏛ◊✲⛉2㸪໭ᾏ㐨኱Ꮫ኱Ꮫ㝔ᕤᏛ◊✲㝔
Yukihiro Kohata1, Yoichi Watabe2
1㸪Department of Civil Engineering,, Muroran Institute of Technology
2㸪Faculty of Engineering,, Hokkaido University

Abstract
Natural disasters caused by huge earthquake have occurred in various places, and has made a great
impact on social activities and people's lives in recent years in Japan. Then the effect on transportation
caused by disaster on earthquake is very high. The Hokkaido Eastern Iburi earthquake in 2018 caused
geotechnical disasters, which are large slope failures in wide area, and unique liquefaction at Satozuka area
in Sapporo city etc. In particular, serious geotechnical damages were induced in Atsuma town recorded 7
on the Japanese seismic intensity scale (a magnitude of 6.7). This report is summarized about grounddisaster at Atsuma town and at Satozuka area etc. in Sapporo city due to the 2018 Hokkaido Eastern Iburi
earthquake.
Key Words: The 2018 Hokkaido Eastern Iburi earthquake, Geotechnical disaster, Field investigation࣮࣮࢟࣡ࢻ㸸໭໭ᾏ㐨⫹᣺ᮾ㒊ᆅᆅ㟈㸪ᆅ┙⅏ᐖ㸪⌧ᆅㄪᰝ1䠊ࡣࡌࡵ࡟2018 ᖺ 9 ᭶ 6 ᪥ 3 ᫬ 7 ศ࡟㸪໭ᾏ㐨⫹᣺ᆅ᪉୰ᮾ㒊ࢆ㟈※࡜ࡍࡿ࣐ࢢࢽࢳ࣮ࣗࢻ 6.7 ࡢ┤ୗᆺᆅ㟈ࡀⓎ⏕ࡋ㸪໭ᾏ㐨ຬᡶ㒆ཌ┿⏫࡛ࡣ໭ᾏ㐨ࡢほ ྐୖึ࡜࡞ࡿ᭱኱㟈ᗘ 7 ࢆグ㘓ࡋࡓࠋࡇࡢᆅ㟈࡟ࡼࡾ㸪໭ᾏ㐨ཌ┿⏫࡟࠾࠸࡚㸪ᗈ⠊ᅖ࡟ࢃࡓࡿ኱つᶍᩳ㠃ᔂቯࡀⓎ⏕ࡋ㸪ࡑࡢᔂቯ㠃✚ࡣ㸪ᡃࡀᅜ࡟࠾࠸࡚Ⓨ⏕ࡋࡓᕧ኱ᆅ㟈࡟ࡼࡿᩳ㠃ᔂቯ㠃✚ࡢ୰࡛㐣ཤ᭱኱つᶍ࡛࠶ࡗࡓࠋࡲࡓ㸪ᮐᖠᕷࡸⱢᑠ∾ ࡛ࡣᆅ┙ࡢᾮ≧໬⌧㇟ࡀぢࡽࢀ㸪࡜ࡾࢃࡅ㸪ᮐᖠᕷΎ⏣༊㔛ሯᆅ༊࡛Ⓨ⏕ࡋࡓᾮ≧໬ࡣ㸪ࡇࢀࡲ࡛ぢࡽࢀࡓᾮ≧໬⌧㇟࡜ࡣ␗࡞ࡾ㸪ᆅ┙୰࡟Ⓨ⏕ࡋࡓᾮ≧໬ᒙࡀὶືࡍࡿࡇ࡜࡟ࡼࡾ࡟㸪኱つᶍ࡞ᆅ┙ỿୗࡀ⏕ࡌࡿࡶࡢ࡛࠶ࡗࡓࠋ୍᪉㸪ࢃࡀᅜ࡛ࡣึࡵ࡚࡜࡞ࡿ஦㇟࡜ࡋ࡚㸪㟁ຊ఍♫ࡀ⟶㎄ࡍࡿ࢚ࣜ࢔඲ᇦ࡛೵㟁࡜࡞ࡿࣈࣛࢵࢡ࢔࢘ࢺࡀⓎ⏕ࡋ㸪໭ᾏ㐨඲ᇦࡢ⤒῭άືࡀ೵Ṇࡍࡿࡤ࠿ࡾ࠿㸪Ⓨ⅏ᚋࡢᩆຓάື࡟ࡶ኱ࡁ࡞ᙳ㡪ࢆཬࡰࡋࡓࠋᮏሗࡣ㸪2018 ᖺ 9 ᭶໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈ࡢᆅ┙⅏ᐖ࡟㛵ࡋ࡚㸪ཌ┿⏫ྜྷ㔝ᆅ༊㸪ᐩ㔛ᆅ༊㸪ᖠෆᆅ༊࠾ࡼࡧᮐᖠᕷΎ⏣༊㔛ሯᆅ༊ࡢ࡯࠿ᾮ≧໬Ⓨ⏕⟠ᡤ࡟ࡘ࠸࡚⌧ᆅㄪᰝࢆᐇ᪋ࡋ㸪ࡇࢀࡽࡢㄪᰝ࠿ࡽ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈࡟ࡼࡿᆅ┙⅏ᐖ஦౛ࢆࡲ࡜ࡵࡓࡶࡢ࡛࠶ࡿࠋ3ᅗ 1 㟈ᗘศᕸᅗ 1)2䠊㟈ᗘ䞉㟈㟈ኸ䛾䛾ศᕸ໭ᾏ㐨⫹᣺ᆅ᪉୰ᮾ㒊ࢆ㟈※࡜ࡍࡿ࣐ࢢࢽࢳ࣮ࣗࢻ 6.7࠹୉‫و‬ໝ͹༪ਔࡢ┤ୗᆺᆅ㟈ࡀⓎ⏕ࡋ㸪໭ᾏ㐨ຬᡶ㒆ཌ┿⏫࡛ࡣ໭ᾏ㐨ࡢྐୖึ࡜࡞ࡿ᭱኱㟈ᗘ 7ほࢆグ㘓ࡋ㸪ᖹᡂ 30 ᖺ໭ᾏ㐨⫹ᅗ᣺ᮾ㒊ᆅ㟈࡜࿨ྡࡉࢀࡓࠋᅗ1 ࡣ㟈ᗘศᕸᅗ࡛࠶ࡿ 1)ࠋᏳᖹ
⏫㸪ࡴ࠿ࢃ⏫࡛㟈ᗘ 6 ᙉ㸪༓ṓᕷ㸪᪥㧗⏫㸪ᖹྲྀ⏫㸪ᮐᖠᕷᮾ༊࡛㟈ᗘ 6 ᙅ࡛࠶ࡗࡓࠋ

ᅗ 2 㟈ኸศᕸᅗ 2)

㟈※ࢆ୰ᚰ࡟࡯ࡰྠᚰ෇≧࡟㟈ᗘࡀᑠࡉࡃ࡞ࡗ࡚࠸ࡿࡀ㸪㟈※࠿ࡽࡢ㊥㞳ࡀ⣙ 80 km 㞳ࢀ࡚࠸ࡿᮐᖠᕷᮾ༊ࡢ㟈ᗘࡀ኱ࡁ࠸ࠋ㟈※ࡢ
῝ࡉࡣ 37 km㸪Ⓨ㟈ᶵᵓࡣᮾ໭ᮾ㸫す༡す᪉ྥ࡟ᅽຊ㍈ࢆᣢࡘ㏫᩿ᒙᆺ࡛࠶ࡿࠋࡲࡓ㸪2019 ᖺ 2 ᭶ 21
ᅗ 2 ࡟㟈
᪥ 21 ᫬ 22 ศ࡟࣐ࢢࢽࢳ࣮ࣗࢻ 5.8 ࡜࡞ࡿవ㟈ࡀⓎ⏕ࡋ㸪ཌ┿⏫࡛᭱኱㟈ᗘ 6 ᙅࢆグ㘓ࡋࡓࠋᅗኸศᕸᅗࢆ♧ࡍ 2)ࠋᙜึ㸪௒ᅇࡢᆅ㟈ࡣ▼⊁పᆅᮾ⦕᩿ᒙᖏ༡㒊ࡢ᩿ᒙࡀື࠸ࡓࡇ࡜࡟㉳ᅉࡍࡿ࡜ࡢ᥎
ᅗ 2 ࡼࡾ㸪ᮏ㟈㸪వ㟈࡜ࡶ࡟▼⊁పᆅᮾ⦕᩿ᒙᖏ࡟㏆࠸ูࡢ⟠ᡤ࡛ࡢ᩿ᒙ㐠ື࡛Ⓨ⏕ࡋㄽࡶ࠶ࡗࡓࡀ㸪ᅗࡓࡇ࡜ࡀ᥎ᐹࡉࢀࡿࠋ3䠊໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈䛾⿕⅏ᴫせᖹᡂ 31 ᖺ 4 ᭶ 1 ᪥⌧ᅾ࡛㸪ேⓗ⿕ᐖࡣṚ⪅ 43 ྡ㸦㟈⅏㛵㐃Ṛ⪅ᩘࢆྵࡴ㸧㸪㔜യ 48 ྡ㸪㍍യ 734
ྡ࡛࠶ࡾ㸪኱つᶍ࡞ᩳ㠃ᔂቯࡀⓎ⏕ࡋࡓཌ┿⏫ࡣṚ⪅ 36 ྡ࡛࠶ࡾ᭱ࡶṚ⪅ᩘࡀከ࠿ࡗࡓ 3)ࠋ㔜യ⪅ࡣ㸪ࡴ࠿ࢃ⏫ࡀ 24 ྡ࡛᭱ࡶከࡃ㸪ḟ࡟Ɫᑠ∾ᕷࡢ 9 ྡ࡛࠶ࡗࡓࠋ㍍യ⪅ᩘࡣ㸪᭱ࡶከ࠸ࡢࡀᮐᖠᕷ࡛ 294ྡ㸪ḟ࠸࡛㸪ࡴ࠿ࢃ⏫ࡢ 250 ྡ࡛࠶ࡗࡓࠋࡲࡓ㸪ఫᏯ⿕ᐖࡣ඲ቯ 469 Ჷ㸪༙ቯ 1,660 Ჷ㸪୍㒊◚ᦆ 13,849
Ჷ㸪㠀ఫᐙ⿕ᐖ㸦಴ᗜ➼㸧࡜ࡋ࡚ 2,490 Ჷࡀሗ࿌ࡉࢀ࡚࠸ࡿ 3)ࠋ඲ቯࡋࡓఫᏯࡣ㸪2016 ᖺ⇃ᮏᆅ㟈ࡢ඲

4ቯఫᏯ 8,682 Ჷ࡟ẚ࡭ࡿ࡜ᮏᆅ㟈࡟ࡼࡿᘓ≀⿕ᐖࡣᑡ࡞࠿ࡗࡓࠋࡇࢀࡣ㸪໭ᾏ㐨ࡢఫᏯࡀ෤ᮇࡢ㞷Ⲵ㔜ࢆ⪃៖ࡋ࡚⎰ࢆ౑⏝ࡋ࡚࠸࡞࠸ࡇ࡜㸪ࡲࡓ㸪⇃ᮏ┴┈ᇛ⏫࡟ẚ࡭ୡᖏᩘࡀᑡ࡞࠿ࡗࡓࡇ࡜➼ࡀᙳ㡪ࡋ࡚࠸ࡿࡶࡢ࡜ᛮࢃࢀࡿࠋ୍᪉㸪໭ᾏ㐨඲ᇦ࡛㟁ຊ౪⤥ࡀṆࡲࡾࣈࣛࢵࢡ࢔࢘ࢺ࡜࡞ࡾ㸪᭱኱೵㟁ᡞᩘࡣ⣙295 ୓ᡞࡀሗ࿌ࡉࢀ࡚࠸ࡿ 4)ࠋࡇࢀࡣ 1995 ᖺ࡟Ⓨ⏕ࡋࡓරᗜ┴༡㒊ᆅ㟈࡟ࡼࡿ᭱኱೵㟁ᡞᩘࡢ⣙ 260୓ᡞࢆ㉸࠼ࡿつᶍ࡛㸪㟁ຊ఍♫⟶ෆ඲ᇦ࡛ࡢ೵㟁ࡣᅜෆึ࡛࠶ࡗࡓࠋࡍ࡭࡚ࡀ᚟ᪧࡍࡿࡲ࡛࡟せࡋࡓ᫬㛫ࡣ⣙ 45 ᫬㛫࡛㸪་⒪㸪㏻ಙ㸪㔠⼥㸪஺㏻➼ࡢ♫఍࢖ࣥࣇࣛ࡟῝้࡞ᙳ㡪ࢆཬࡰࡋࡓࠋỈ㐨ࡢ⿕ᐖࡣ㸪໭ᾏ㐨ෆࡢ 44 ᕷ⏫ᮧ࡟࠾࠸࡚᭱኱ 68,249 ᡞࡢ᩿ỈࡀⓎ⏕ࡋࡓ 4)ࠋពእ࡞ࡇ࡜࡟㒔ᕷ࢞ࢫࡢ⿕ᐖࡣሗ࿌ࡉࢀ࡚࠸࡞࠸ 4)ࠋ
ᅵ◁⅏ᐖ࡟ࡘ࠸࡚ࡣ㸪ᅵ▼ὶࡀ 227 ௳㸪࠺ࡕཌ┿⏫࡛ 90 ௳ࡀⓎ⏕㸪ࡀࡅᔂࢀࡣ 133 ௳࠺ࡕཌ┿⏫࡛
111 ௳ࡢⓎ⏕ࡀሗ࿌ࡉࢀ 4)㸪ཌ┿⏫࡛ࡢᅵ◁⅏ᐖⓎ⏕௳ᩘࡀᴟࡵ࡚ከ࠿ࡗࡓࠋἙᕝ⿕ᐖࡣ㸪270 ⟠ᡤ࡛࠶ࡗࡓࡀ㸪ሐ㜵ࡢࢡࣛࢵࢡⓎ⏕࡞࡝㸪㍍ᚤ࡞ࡶࡢࡀከ࠿ࡗࡓ 4)ࠋ㐨㊰⿕ᐖࡣ㸪Ⓨ⅏ᚋ㸪14 ༊㛫࡛㏻⾜Ṇࡵ࡜࡞ࡗࡓࡀ㸪㧗㏿㐨㊰࡛ࡣ㸪୍㒊࡟࠾࠸࡚㊰㠃ࡢẁᕪࡸட⿣➼ࡢᦆയࡣⓎ⏕ࡋࡓࡶࡢࡢ኱ࡁ࡞⿕ᐖࡣ࡞ࡃ 4)㸪9 ᭶ 9 ᪥ 8:00 ࡟඲⥺࡛㏻⾜Ṇࡵゎ㝖ࡉࢀ㸪ᅜ㐨࡛ࡣ┠❧ࡗࡓ⿕ᐖࡣ࡞࠿ࡗࡓࠋJR ໭ᾏ㐨࡟࠾࠸࡚ࡣ㸪Ⓨ⅏ᚋ 2 ᪥㛫㐠㌿ぢྜࢃࡏ࡜࡞ࡗࡓࡀ㸪ࡑࡢᚋ㸪㡰ḟ㐠㌿ࡀ෌㛤ࡉࢀࡓࠋࡓࡔࡋ㸪༡༓ṓ㹼἟ࣀ➃㛫࡛㌶㐨ኚ఩ࡀከᩘⓎ⏕ࡋ㸪⣙ 1 㐌㛫⛬ᗘ㸪ᚎ⾜㐠㌿ࡀ⾜ࢃࢀࡓ 4)ࠋ
௨ୖࡢࡼ࠺࡟㸪᫂἞௨㝆ࡢ໭ᾏ㐨࡟࠾ࡅࡿᆅ㟈࡜ࡋ࡚ࡣ㸪ึࡵ࡚᭱኱㟈ᗘ 7 ࢆグ㘓ࡋࡓ┤ୗᆺᆅ㟈࡛࠶ࡾ㸪⏒኱࡞⿕ᐖࡀⓎ⏕ࡋ♫఍ⓗᙳ㡪ࡀᴟࡵ࡚኱ࡁ࠿ࡗࡓࡇ࡜ࡀศ࠿ࡿࠋ

4䠊ཌ┿⏫䛻䛚䛡䜛ᩳ㠃ᔂቯᅗ 3 ࡟ᮏ㟈ࡢ㟈ኸ㸪వ㟈ࡢ㟈※ศᕸ࠾ࡼࡧཌ┿⏫ࡢᩳ㠃ᔂቯ⟠ᡤࢆ♧ࡍ 5)ࠋవ㟈ࡢ㟈※ࡣ㟈ኸࢆᩳ㠃ᔂቯ⟠ᡤࡢศᕸ୰ᚰ࡟࡯ࡰ༡໭᪉ྥ࡟ศᕸࡋ㸪ᩳ㠃ᔂቯ⟠ᡤࡣᗈᅗ⠊ᅖ࡟㟈ኸࡼࡾ໭ഃ࡟ᐦ㞟ࡋ࡚Ⓨ⏕ࡋ࡚࠸ࡿࠋᅗ
4 ࡟㐣ཤࡢᆅ㟈ࡢつᶍ࡜ᔂቯ㠃✚ࡢ㛵ಀࢆ♧ࡍ 6)ࠋ
ᮏ㟈䛾௒ᅇࡢᆅ㟈࡟ࡼࡿᩳ㠃ᔂቯ㠃✚ࡣ 13.4 km2㸪ᅵ㔞㟈ኸ

ࡣ 3000 ୓ m3࡛࠶ࡾ㸪ࡇࢀࡣ㸪ᮐᖠࢻ࣮࣒⣙ 440వ㟈䛾㟈※ศᕸಶศ࡟┦ᙜࡍࡿつᶍ࡛࠶ࡿࠋࡲࡓ㸪㐣ཤࡢᆅ㟈ࡢつᶍ࡟ᑐࡍࡿᔂቯ㠃✚ࡀ᭱ࡶከ࠸ࡇ࡜ࡀศ࠿ࡿࡀ㸪ࡇࢀࡣ᫂἞௨㝆ࡢ୺せ࡞ᆅ㟈⅏ᐖࡢ୰࡛ࡶ᭱ᅗ 3 ᩳ㠃ᔂቯ⟠ᡤ࡜ࡢ㟈※ศᕸ 5)ࡶከ࠸ࡇ࡜ࡀሗ࿌ࡉࢀ࡚࠸ࡿ 6)ࠋཌ┿⏫ࡢᆅ㉁ࡣ㸪῝
ᗘ 18 m ௜㏆ࡲ࡛⾲ᒙ࠿ࡽ㡰࡟㸪ᶡ๓ᒣ㸪ᜨᗞᓅ㸪ᨭ➖࢝ࣝࢹࣛࢆᄇฟ※࡜ࡍࡿⅆᒣ⅊࡛ᵓᡂࡉࢀ࡚࠾ࡾ㸪ᶡ๓ᒣ㉳※ࡢᶡ๓㝆ୗ㍍▼
㸦Ta㸧ᆅᒙࡣ㸪Ta-a ࠿ࡽTa-d ࡲ࡛ 4 ࣘࢽࢵࢺ࡛ᵓᡂ
ࡉࢀ࡚࠸ࡿࠋTa-a ࡣ 1739
ᖺ㸪Ta-b ࡣ 1667 ᖺ㸪Ta-cᅗ 4 㐣ཤࡢᆅ㟈ࡢつᶍ࡜ᔂቯ㠃✚ 6)5

ࡣ⣙ 2000 ᖺ๓㸪Ta-d ࡣ⣙ 9000 ᖺ๓ࡢᶡ๓ᒣᄇⅆ࡟ࡼࡿࡶࡢ࡜⪃࠼ࡽࢀ࡚࠸ࡿࠋࡇࢀࡽࡣ⢏ᚄ࡜㢼໬ࡢ⛬ᗘࡀ␗࡞ࡾ㸪ᒙཌࡣ 1㹼4 m ⛬ᗘࡢࡶࡢࡀከࡃ㸪N ್ࡣ 1㹼3 ⛬ᗘ࡜ሗ࿌Ta-b,cᅗ 5㸧7)ࠋ෗
෗┿ 1 ࡣཌ┿⏫ྜྷ㔝ᆅ༊࡟࠾ࡅࡿ኱ࡉࢀ࡚࠸ࡿ㸦ᅗTa-d෗┿ 2 ࡣཌ┿⏫ᐩ㔛ᆅ༊ίỈつᶍᩳ㠃ᔂቯࡢ≧ἣ࡛࠶ࡾ㸪෗En-aሙᚋ⫼ࡢᩳ㠃ᔂቯ≧ἣ࡛࠶ࡿࠋ⌧ᆅ㋃ᰝ࠾ࡼࡧ UAV㸦ࢻ࣮ࣟࣥ㸧࡟ࡼࡿୖ✵࠿ࡽࡢಠ▔ㄪᰝ࡟ࡼࡿ⌧ᆅㄪᰝࢆ⾜ࡗࡓSpfa-1⤖ᯝ㸪ཌ┿⏫ྜྷ㔝ᆅ༊ࡸᐩ㔛ᆅ༊ࡢᩳ㠃ᔂቯࡣ⾲ᒙᔂቯ࡛࠶ࡿࡇ࡜ࡀศ࠿ࡗࡓࠋࡲࡓ㸪ྜྷ㔝ᆅ༊ࡢᔂቯ⟠ᡤࡢᩳ㠃࡟ࡣ➽≧ࡢ᧿㐣⑞ࡀぢࡽࢀࡿࡇ࡜࠿ࡽ㸪඾ᆺⓗ࡞⾲ᒙᔂቯ࡛࠶ࡾẚ㍑ⓗ㏿࠸㏿ᗘ࡛ᅵሢࡀ⛣ືࡍࡿᩳ㠃ᔂቯ࡛࠶ࡗࡓࡇ
࡜ࡀ᥎ᐹࡉࢀࡿࠋࡉࡽ࡟㸪ᐩ㔛ᆅ༊ࡢᩳ㠃ᔂቯ⟠ᡤ࡛ࡣ㸪⾲ᒙᔂቯ࡜㇂㒊࡛ࡢẚ㍑ⓗ῝࠸఩⨨࠿ࡽࡢࡍ࡭ࡾ◚ቯࡀ⏕ࡌ࡚࠸ࡓࡇ࡜ࡶ☜ㄆࡉࢀࡓࠋྜྷ㔝ᆅ༊㸪ᐩ㔛ᆅ༊࡜ࡶ࡟㸪ࡍ࡭ࡾ㠃ࡣᶡ๓ⅆᒣ⅊ᒙࡢ Ta-d ࣘࢽࢵࢺ࡛࠶ࡗࡓ࡜⪃࠼ࡽࢀࡿ 8)ࠋ୍᪉㸪ᖠෆᆅ༊ࡢᩳ㠃ᔂቯࡣẚ㍑ⓗ῝࠸఩⨨࠿ࡽࡢࡍ࡭ࡾ◚ቯࡀぢࡽࢀ㸪ࡍ࡭ࡾ㠃ࡢ㝆ୗ㍍▼ሁ✚≀㸦ⅆᒣ⅊㸧ࡣ㸪ᜨᗞᓅࢆᄇฟ※࡜ࡍࡿ En-a ࡟㏆࠸ᛶ≧ࢆ♧ࡋࡓࡇ࡜࠿డ ‫آ‬ʤೊ‫آ‬ʥࡽ㸪ᜨᗞ㍍▼ᒙࡲ࡛㸪ࡍ࡭ࡾࡢᙳ㡪ࡢྍ⬟ᛶࡀ࠶ࡿ࡜⪃࠼෗┿ 3 ࡣ㸪ཌ┿ᕝᮏᕝ㸪ᖠෆᶫ௜㏆࡛ࡢᩳ㠃ᔂቯࡽࢀࡿࠋ෗

ᅗ 5 ཌ┿⏫ࡢ࣮࣎ࣜࣥࢢᰕ≧ᅗࡢ୍౛ࡢ≧ἣ࡛࠶ࡿࠋ෗┿୰ኸࡢἑ㒊࠿ࡽ኱㔞ࡢᅵ◁ࡀὶࢀฟࡋ㸪෗┿ 1 ཌ┿⏫ྜྷ㔝ᆅ༊ࡢᩳ㠃ᔂቯ෗┿ 3 ᅵ▼ὶ࡟ࡼࡿཌ┿ᕝࡢἙ㐨㛢ሰ6෗┿ 2 ཌ┿⏫ᐩ㔛ίỈሙࡢᩳ㠃ᔂቯ

ᅗ 6 ᪥㧗ᖠෆᕝୖὶ㒊኱つᶍᆅࡍ࡭ࡾ 9)Ἑ㐨㛢ሰࡀ⏕ࡌࡓ≧ἣ࡛࠶ࡗࡓࠋ୍⯡࡟㸪ᅵ▼ὶࡣ㇦㞵࡟ࡼࡾᅵ◁ࡸᒾ▼ࡀὶỈ࡜࡜ࡶ࡟㧗㏿࡛ὶୗࡍࡿ⌧㇟࡛࠶ࡿࡀ㸪௒ᅇࡢᆅ㟈࡟ࡼࡿᅵ▼ὶ࡟ࡣỈศࡀ࠶ࡲࡾྵࡲࢀ࡚࠸࡞࠿ࡗࡓࡼ࠺࡛࠶ࡿࠋࡇࡢᅵ▼ὶࡣ㸪ἑୖ㒊㸦῝㒊㸧࡟࠶ࡿ࠸ࡃࡘ࠿ࡢᩳ㠃ࡀᔂቯࡋ㸪୍య࡜࡞ࡗ࡚Ⓨ⏕ࡋࡓࡶࡢ࡜⪃࠼ࡽࢀࡿࠋ᪥㧗ᖠෆᕝୖὶ㒊ࡢྑᓊ࡟࠾࠸࡚㸪ᅗ 5 ࡟♧ࡍࡼ࠺࡟㸪㛗ࡉ⣙ 1000 m㸪ᖜ⣙ 500 m ࡟ࢃࡓࡿᑿ᰿㒊ࡀᆅ㟈࡟ࡼࡾ⣙ 500 m ⁥ືࡋἙᕝ㛢ሰࡀ⏕ࡌࡓ 9)ࠋࡇࢀࡣ኱つᶍ࠿ࡘᔂቯ㠃ࡀ῝࠸ᆅࡍ࡭ࡾ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ
㸦ὀ㸸ࡇࡇࡲ࡛㸪ᅗ␒ྕࡢ᭱ᚋࡣᅗ 6㸪෗┿␒ྕࡢ᭱ᚋࡣ෗┿ 3㸪ᩥ⊩␒ྕࡢ᭱ᚋࡣ 9㸧࡛ࡍࠋ㸧䠑䠊ᮐᮐᖠᕷ䛻䛚䛡䜛ᾮ≧໬⅏ᐖ⿕⅏ᆅࢆ༡す࡟ྥ࠿ࡗ࡚᧜ᙳࡋࡓ෗┿ࢆᅗ5࡟㸪ࡲࡓ㸪⌧ᆅࡢヲ⣽࡞ᆅᅗࢆᅗ8࡟♧ࡍࠋᾮ≧໬ࡋࡓᅵ◁ࡢὶฟ࡟ࡼࡾⴭࡋ࠸㝗ἐࡀᖏ≧࡟Ⓨ⏕ࡋࡓ⠊ᅖ࡜ᆅ⾲㠃࡬ࡢᅵ◁ᄇฟ⟠ᡤ㸪Ỉ㐨⟶ᦆയ⟠ᡤ࡜኱㔞ࡢỈࡀὶࢀࡓ⠊ᅖࡸὶୗࡋࡓᅵ◁ࡀሁ✚ࡋࡓ⠊ᅖࢆ෗┿࡟㔜ࡡྜࢃࡏ࡚♧ࡋ࡚࠸ࡿࠋᖏ≧ࡢ㝗ἐ⠊ᅖࡣ㸪ୖὶഃ࠿ࡽ஬ゅᙧ㸦࣮࣒࣮࣍࣋ࢫᆺ㸧ࡢ㔛ሯ୰ኸࡱ࡫ࡽබᅬࡲ࡛ࡣ⦆ࡸ࠿࡞໙㓄࡛࠶ࡾ㸪ࡉࡽ࡟ୗὶ࡟ྥ࠿ࡗ࡚ᛴ࡟໙㓄ࡀቑࡍ⦪᩿㠃࡟࡞ࡗ࡚࠸ࡿࠋ≉࡟ୗ➃㒊࡛ᶆ㧗60m࡜ᶆ㧗55mࡢ➼㧗⥺ࡀ㏆ࡃ໙㓄ࡀᛴ࡛࠶ࡿࠋᅵ◁ࡀᄇฟࡋࡓ⟠ᡤࡣ㸪ᆅ⾲㠃໙㓄ࡀቑຍࡋ㸪ᆅୗỈ఩ࡀᆅ⾲㠃┤ୗࡲ࡛┦ᑐⓗ࡟ὸࡃ࡞ࡗ࡚࠸ࡓ⟠ᡤ࡟ヱᙜࡍࡿࠋỈ㐨⟶ᦆയ⟠ᡤࡢᅵ◁ࡣὶືࡍࡿࡲ࡛࡟ࡣ⮳ࡗ࡚࠸࡞࠸ࠋὶฟࡋࡓ኱㔞ࡢỈ㐨Ỉࡣ㐨㊰㠃ࢆὶୗࡋ㸪ᅵ◁ᄇฟ⟠ᡤ௜㏆࡛ὶฟᅵ◁ࡢὶࢀ࡜ྜὶࡋ㸪ᖏ≧ࡢ㝗ἐᇦ࠿ࡽࡢὶฟᅵ◁ࢆୗὶഃࡢᗈ࠸⠊ᅖ࡟㐠ࢇࡔ࡜᥎ᐹࡉࢀࡿࠋ࡞࠾㸪㔛ሯ୰ኸࡱ࡫ࡽබᅬࡢ໭すഃ࡟⊂❧ࡋࡓ㝗ἐᇦࡀ࠶ࡿࡀ㸪ࡇࡇࡣᒁᡤⓗ࡞㝗ἐ࡛࠶ࡾ㸪ᆅ⾲㠃ࡢ≧ἣࢆぢࡿ㝈ࡾୗὶഃ࡟ྥ࠿ࡗ࡚ὶฟࡋࡓ⑞㊧ࡣ☜ㄆࡉࢀ࡞࠿ࡗࡓࠋᬯῺἙᕝࡢୖ࡟఩⨨ࡍࡿࡇࡢ㝗ἐ࡟ࡘ࠸࡚ࡣ㸪ᆅୗỈ㠃ࡼࡾ῝ࡃ࡟఩⨨ࡍࡿᬯῺἙᕝ࡟⣽⢏ศࡀ྾࠸ฟࡉࢀࡿ࡞࡝ࡋ࡚㸪ᆅ㟈Ⓨ⏕๓࠿ࡽ✵Ὕࡀ࡛ࡁ࡚࠸ࡓྍ⬟ᛶࡶ♧၀ࡉࢀࡿࡀ㸪᚟ᪧᕤ஦ࡢ୰࡛࿘㎶ࢆ᥀๐ࡋ࡚ࡶ㸪≉࡟✵Ὕࡢ⑞㊧ࡣㄆࡵࡽࢀ࡞࠿ࡗࡓࠋ

ᅗ 7 ⿕⅏ᆅࢆ༡すྥࡁ࡟᧜ᙳࡋࡓ⯟✵෗┿ࠊᮅ᪥᪂⪺♫ࡢࢳ࣮ࣕࢱ࣮ᶵࡼࡾⴭ⪅ࡀ᧜ᙳ

ᅗ 8 ⿕⅏ᆅࡢᆅᅗ࡜෗┿᧜ᙳ⟠ᡤ㸦ᅜᅵᆅ⌮㝔ࡢ㟁Ꮚᆅᅗ࡟ຍ➹㸧

7ᅗ୰ࡢ(a)㹼(e)࡛᧜ᙳࡋࡓ⌧ᆅࡢ⿕ᐖ≧ἣࢆ෗┿ 4㹼8 ࡟♧ࡍࠋ

෗┿ 4 ࡣ㸪ᖏ≧ࡢ㝗ἐ⠊ᅖࡢ᭱ࡶୖ㒊࡟ᙜࡓࡿᆅⅬ a ࡟࠾ࡅࡿ⿕ᐖ≧ἣ࡛㸪ྑഃࡢఫᏯࡀ 1m ㏆ࡃ㝗ἐࡋ㸪㝗ἐᇦࡢቃ⏺㒊ୖ࡟఩⨨ࡍࡿ㌴ᗜࡢഴࡁࡀⴭࡋ࠸ࠋ㌴ᗜෆࡢ⯒⿦࡟ᩘ 10cm ࡢẁᕪࡀ⏕ࡌ࡚࠸ࡿࡀ㸪㏆㞄ࡢఫẸࡢヰ࡟ࡼࡿ࡜㸪ᆅ㟈┤ᚋࡢẁᕪࡣࡇࡇࡲ࡛ࡦ࡝ࡃࡣ࡞࠿ࡗࡓ࡜࠸࠺ࠋࡲࡓ㸪ࡇࡢ௜㏆࡛㝗ἐࡋࡓఫᏯ࡟ఫࢇ࡛࠸ࡓูࡢఫẸࡢヰ࡟ࡼࡿ࡜㸪ᆅ㟈ࡢᦂࢀࡀ཰ࡲࡗ࡚እ࡟ฟࡿ࡜㸪┠ࡢ๓ࡢ㐨㊰ࡀ㝯㉳ࡋࡓࡼ࠺࡟ᛮ࠼ࡓ࡜࠸࠺ࠋࡑࡢᚋ㸪᫂ࡿࡃ࡞ࡗ࡚࠿ࡽᨵࡵ࡚እ࡟ฟࡿ࡜㸪ࡉࡽ࡟㝯㉳ࡀࡦ࡝ࡃ࡞ࡗ࡚࠸ࡓ࡜ヰࡋ࡚࠸ࡓࠋࡇ
ࢀࡽࡢࡇ࡜ࡣ㸪ᆅ㟈┤ᚋ࡟࠶ࡿ⛬ᗘࡣ㝗ἐࡋ࡚࠸ࡓࡇ࡜㸪ࡑࡢᚋᑡࡋ᫬㛫ࢆ࠿ࡅ࡚ⴭࡋ࠸㝗ἐ࡟࡞ࡗࡓࡇ࡜
ࢆ࠺࠿ࡀࢃࡏࡿࠋࡲࡓ㸪㝗ἐࡋࡓఫᏯࡢఫẸࡢ᪉ࡀ㸪ᐇ㝿࡜ࡣ㏫࡟┠ࡢ๓ࡢ㐨㊰ࡀ㝯㉳ࡋࡓ࡜຺㐪࠸ࡋࡓ࡜ドゝࡋ࡚࠸ࡿࡇ࡜࠿ࡽ㸪ຍ㏿ᗘࢆឤࡌ࡞࠸⛬࡟ࡺࡗࡃࡾ࡜㝗ἐࡋࡓ࡜⪃࠼ࡽࢀࡿࠋ

෗┿ 4 ⿕⅏ᆅࡢ≧ἣ㸦ᆅⅬ a㸧෗┿ 5 ⿕⅏ᆅࡢ≧ἣ㸦ᆅⅬ b㸧෗┿ 5 ࡣ㸪ᆅⅬ b ࡛᧜ᙳࡋࡓᖏ≧ࡢ㝗ἐᇦࢆᣳࢇ࡛ᘓࡘ 2 ㌺ࡢఫᏯࡢ⿕ᐖ≧ἣ࡛࠶ࡿࠋ෗┿୰ኸ௜㏆࡛
2m ㏆ࡃ㝗ἐࡋ࡚࠸ࡓࠋᕥഃࡢఫᏯࡣ㸪⣙ 40 ᖺ๓࡟Ꮿᆅ㐀ᡂࡉࢀࡓᙜึ࠿ࡽࡢ┤᥋ᇶ♏࡟ࡼࡿఫᏯ࡛㸪ᆅ┙ࡢ㝗ἐ࡜࡜ࡶ࡟ⴭࡋࡃഴ࠸ࡓࡢ࡟ᑐࡋ㸪ྑഃࡢఫᏯࡣ㸪ᘓ᭰࠼ࡢ㝿࡟ᮺᇶ♏ࢆ᪋ᕤࡋࡓࡇ࡜࡛㸪ᆅ┙ࡀ኱ኚᙧࡋࡓ࡟ࡶ࠿࠿ࢃࡽࡎᘓ≀ࡢഴᩳࡀⴭࡋࡃ㍍ῶࡉࢀ࡚࠸ࡓࠋ෗┿ 6 ࡣ㸪㔛ሯ୰ኸࡱ࡫ࡽබᅬࡢ⬥࡟࠶ࡿ㐨㊰ࡢ㝗ἐ࡜ఫᏯࡢ⿕ᐖ≧ἣ࡛࠶ࡿࠋ㔛ሯ୰ኸࡱ࡫ࡽබᅬ࠿ࡽ
ࡇࡢ෗┿ࡢ㎶ࡾ࡟࠿ࡅ࡚ࡢỿୗ㔞ࡀ᭱ࡶ኱ࡁࡃ㸪⣙ 3m ࡟㐩ࡋ࡚࠸ࡓࠋྑഃࡢᘓ≀ࡣ㸪ࡇࡢᆅ༊࡟࠾ࡅࡿ⿕ᐖࡢ୰࡛᭱ࡶഴᩳࡀ኱ࡁ࠿ࡗࡓఫᏯ࡛࠶ࡿࠋ㐨㊰ୖ࡟ࡣỈࡀ⁀ࡲࡗ࡚࠸ࡿࡀ㸪ࡇࡢỈࡣࡑࡢᚋࡶ㛗ᮇ㛫࡟ࢃࡓࡾ⁀ࡲࡗ࡚࠸ࡓࡇ࡜࠿ࡽ㸪ᆅୗỈ఩࡜࡯ࡰ୍⮴ࡍࡿ࡜⪃࠼ࡽࢀ㸪ᙜヱᆅᇦࡢᆅୗỈ఩ࡀὸ࠸㸦㧗࠸㸧ࡇ࡜ࡀ♧၀ࡉࢀࡓࠋ⁀ࡲࡗ࡚࠸ࡿỈࡣ⣽⢏ศࢆྵࡳ⃮ࡗ࡚࠸ࡿࡶࡢࡢ㸪⃮ࡗࡓᆅୗỈࡀ‪࠸࡚࠸ࡿ⛬ᗘ࡛㸪ᾮ≧໬࡟ࡼࡿᄇ◁ࡣ☜ㄆ࡛ࡁ࡞࠿ࡗࡓࠋ

෗┿ 7 ࡣ㸪ᾮ≧໬ࡋࡓᅵ◁ࡀὶฟࡋࡓᆅⅬ d ௜㏆ࡢ⿕⅏≧ἣ࡛࠶ࡿࠋ෗┿ࡢᕥྑ୧ഃࡢᆅ⾲㠃࡟ࡣ኱㔞ࡢᅵ◁ࡀሁ✚ࡋ࡚࠸ࡿࡀ㸪ࡇࢀࡣᾮ≧໬ࡋࡓᅵ◁ࡀ┒ᅵୖ㒊࠿ࡽ⥆ࡃ⿕ᅽ≧ែ࡜࡞ࡾ㸪ᆅ┙⾲㠃ࢆᢲࡋ◚ࡗ࡚ὶฟࡋࡓᅵ◁ࡀ࿘㎶࡟ሁ✚ࡋࡓࡶࡢ࡛࠶ࡿ࡜᥎ᐹࡉࢀࡿࠋ෗┿୰ኸ㒊ࡣ㸪ᦆയࡋࡓỈ㐨⟶࠿ࡽࡢ኱㔞ࡢỈ࡟ࡼࡿ࢞ࣜ౵㣗ࡢ⤖ᯝ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ

8෗┿ 6 ⿕⅏ᆅࡢ≧ἣ㸦ᆅⅬ c㸧෗┿ 7 ⿕⅏ᆅࡢ≧ἣ㸦ᆅⅬ d㸧෗┿ 8 ⿕⅏ᆅࡢ≧ἣ㸦ᆅⅬ e㸧

ᅗ 9 ⿕⅏ᆅࡢᪧᆅᙧᅗ࡜ࡢ㔜ࡡྜࢃࡏ 10)

෗┿ 8 ࡣ㸪ᾮ≧໬ࡋࡓᅵ◁ࡀᄇฟࡋࡓ௜㏆࡟ぢࡽࢀࡓᾮ≧໬ࡢ⑞㊧࡛㸪ఫᏯ๓ࡢ㐨㊰⯒⿦ࡀࢥࣥࢡ࣮ࣜࢺ〇ࡢሟ࡜࡜ࡶ࡟኱ࡁࡃᣢࡕୖࡆࡽࢀ࡚࠾ࡾ㸪ᅵ◁ࡢ኱つᶍὶฟࡢ┤๓ࡲ࡛㧗࠸ᥭᅽࡀ࠿࠿ࡗࡓࡇ࡜ࢆ࠺࠿ࡀ࠸▱ࡿࡇ࡜ࡀ࡛ࡁࡿࠋ⿕⅏ᆅࡢ᭱᪂ࡢᆅᅗ࡜ᪧᆅᙧᅗ࡜ࢆ㔜ࡡྜࢃࡏࡓᆅᅗࡀᅜᅵᆅ⌮㝔࠿ࡽබ㛤ࡉࢀ࡚࠸ࡿ㸦ᅗ 9㸧10)ࠋ⿕⅏ᆅࡣ㇂ᇙࡵ┒ᅵ࡟ἢࡗ࡚Ⓨ⏕ࡋࡓࡇ࡜ࡀㄞࡳྲྀࢀࡿࠋᙜヱᆅ༊ࡣᨭ➖ⅆ○ὶሁ✚≀࠿ࡽ࡞ࡿྎᆅࡢ࡯ࡰᮎ➃࡟఩⨨ࡋ㸪ᗄ➽ࡶࡢ㇂ᆅᙧࡀᙧᡂࡉࢀ࡚࠸ࡓࠋ㔛ሯᆅ༊ࡣᮐᖠ㑹እ࡛Ꮿᆅ㛤Ⓨࡀ㐍ࢇࡔ 1970 ᖺ௦ᚋ༙࡟㐀ᡂࡉࢀࡓࠋ㇂ᇙࡵ┒ᅵࡢཌࡉࡣ᭱኱⣙ 10m ࡛࠶ࡾ㸪㇂ᆅᙧ࡟ἢࡗ࡚ὶࢀ࡚࠸ࡓ୕㔛ᕝࡣ࣎ࢵࢡࢫ࢝ࣝࣂ࣮ࢺ࡟ࡼࡿᬯῺἙᕝ࡜ࡋ࡚ᇙタࡉࢀࡓࠋ࣎ࢵࢡࢫ࢝ࣝࣂ࣮ࢺෆ࡟ࡣᆅ㟈࡟ࡼࡿᦆയࡣぢࡽࢀࡎ㸪೺඲࡞≧ែ࡛࠶ࡗࡓࠋࡓࡔࡋ㸪ᆅୗỈ㠃ୗ⣙ 5m ࡢ㧗࠸Ỉᅽୗ࡟࠶ࡿ࡟ࡶ࠿࠿ࢃࡽࡎ㸪᥋⥆ࡍࡿ᤼Ỉ⟶㸦ሷࣅ〇ࡢ᭷Ꮝ⟶㸧࠿ࡽࡢὶධ㔞ࡣከ࠸࡜ࡣゝ࠼ࡎ㸪┠ワࡲࡾ࡞࡝࡟ࡼࡾᆅᇦ඲యࡢ᤼Ỉᶵ⬟ࡀపୗࡋ࡚࠸ࡿྍ⬟ᛶࡀ♧၀ࡉࢀࡓࠋࡲࡓ㸪᤼Ỉ⟶ࢆ㏻ࡗ࡚⣽⢏ศࡀᢤࡅฟࡋࡓ⑞㊧ࡀ☜ㄆࡉࢀࡿ⟠ᡤࡶ࠶ࡗࡓࠋ࡞࠾㸪ᆅ㟈ᚋ࡟☜ㄆࡋࡓࡇࡢ≧ἣࡀᆅ㟈๓࠿ࡽ⥆ࡃࡶࡢ࡞ࡢ࠿ࡣ᫂ࡽ࠿࡛ࡣ࡞࠸ࠋ
┒ᅵᮦᩱࡣ㸪ᗈᇦ࡟ࢃࡓࡗ࡚࡯ࡰྠᵝࡢ⢏ᚄศᕸ࡛࠶ࡾ㸪0.075mmᮍ‶ࡢ⣽⢏ศࡣ⣙40%࡛࠶ࡗࡓࠋ⣽⢏ศࡣ㠀ረᛶ࡛࠶ࡿࠋࣉࣟࢡࢱ࣮ࡢᶆ‽࢚ࢿࣝࢠ࣮࡛✺ࡁᅛࡵࡿᶆ‽⥾ᅛࡵヨ㦂࡟ࡼࢀࡤ㸪᭱㐺ྵỈẚw opt ࡣ42.6%㸪᭱኱஝⇱ᐦᗘǒ dmax ࡣ1.094g/cm3ࡀᚓࡽࢀࡓࠋ᭱኱஝⇱ᐦᗘࡀᑠࡉ࠸ࡇ࡜࠿ࡽࢃ࠿ࡿࡼ࠺࡟㸪⣽⢏ศࡀ⥾ᅛࡵࢆ㜼ᐖࡋ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡿ㸬᭱ᑠ࣭᭱኱ᐦᗘヨ㦂㸦JIS A 1224㸧ࡼࡾ㸪᭱኱㛫㝽ẚe max ࡜᭱ᑠ㛫㝽ẚe min ࡜ࡋ࡚2.192࡜1.275ࡀᚓࡽࢀࡓࠋ࡞࠾㸪⣽⢏ศࡀከࡃ㸪᭱ᑠ࣭᭱኱ᐦᗘヨ㦂ࡢ㐺⏝⠊ᅖእ࡜࡞ࡿࡓࡵ㸪ࡇࢀࡽࡣཧ⪃್࡜ࡋ࡚ࡢ఩⨨௜ࡅ࡜࡞ࡿࠋᅵ⢏Ꮚᐦᗘǒ s ࡣ2.391g/cm3࡛࠶ࡗࡓࠋ

92018ᖺ11᭶࡟㔛ሯ୰ኸࡱ࡫ࡽබᅬ࡟࠾࠸࡚㸪ᅵᮌ◊✲ᡤᐮᆅᅵᮌ◊✲ᡤࡀ㸪ᅛᐃࣆࢫࢺࣥᘧࢩ࢛࣮ࣥ࢘ࣝࢧࣥࣉ࣮ࣛࢆ౑ࡗ࡚஘ࢀࡢᑡ࡞࠸ヨᩱࡢ᥇ྲྀࢆᐇ᪋ࡋࡓࠋᥦ౪࠸ࡓࡔ࠸ࡓࢹ࣮ࢱ࡟ࡼࡿ࡜㸪ᆅୗỈ఩ࡼࡾࡶୖ㒊㸦୙㣬࿴ᖏ㸧࡛஝⇱ᐦᗘ0.859g/cm3㸪ᆅୗỈ఩ࡼࡾࡶୗ㒊㸦㣬࿴ᖏ㸧࡛஝⇱ᐦᗘ0.967g/cm3࡛࠶ࡗࡓࠋ
ࡇࢀࡽࡢ್ࡣࡑࢀࡒࢀ㸪㛫㝽ẚ࡛1.703࡜1.407㸪┦ᑐᐦᗘ࡛40.7%࡜63.3%㸪⥾ᅛࡵᗘ࡛78.5%࡜88.7%࡟┦ᙜࡍࡿࠋᆅୗỈ఩௨ୗࡢᅵࡣ㸪ᾮ≧໬ᚋࡢ᤼Ỉ࡟ࡼࡾⴭࡋࡃᅽ⦰ࡋࡓ࡜⪃࠼ࡽࢀࡿࡓࡵ㸪ᆅୗỈ఩ࡼࡾୖ㒊ࡢᅵࡢ᪉ࡀᆅ㟈๓ࡢ⌧ᆅࡢᅵࡢ≧ែࢆ௦⾲ࡋ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡿࠋ
໭ᾏ㐨ᆅ᪉ࡢⅆᒣ⅊㉁◁ࡢᾮ≧໬᢬ᢠ≉ᛶ࡟ࡘ࠸࡚ࡣ㸪ከࡃࡢ᪤ ࡢ◊✲ᡂᯝࡀሗ࿌ࡉࢀ࡚࠸ࡿࠋࡇࡢ࠺
ࡕᩥ⊩11) ࡣ㸪ཎ఩⨨࡜ྠ⛬ᗘ࡟ࡲ࡛ᐦ࡞≧ែ࡟෌ᵓᡂࡋࡓⅆᒣ⅊㉁◁ࡢᾮ≧໬᢬ᢠࡣ㸪ẚ㍑ⓗᐦ࡞㇏ᾆ◁㸦D r =80%㸧ࡢᾮ≧໬᢬ᢠࡼࡾࡶ㧗࠸ࡇ࡜ࢆᣦ᦬ࡋࡓࠋࡓࡔࡋ㸪ᑐ㇟࡜ࡉࢀ࡚࠸ࡿⅆᒣ⅊㉁◁ࡢ⣽⢏ศྵ᭷⋡ࡣ0.2㹼1.6%࡜ᑠࡉࡃ㸪ᮏሗ࿌࡛ᑐ㇟࡜ࡋ࡚࠸ࡿ㔛ሯᆅ༊ࡢ┒ᅵᮦᩱ㸦ⅆᒣ⅊㉁◁㸧ࡢ⣽⢏ศྵ᭷⋡㸦40%๓ᚋ㸧࡟ẚ࡭࡚㠀ᖖ࡟ప࠸್࡛࠶ࡗࡓࠋ୍᪉㸪ᩥ⊩12)ࡣ㸪⣽⢏ศྵ᭷⋡ࢆேᕤⓗ࡟ㄪᩚࡋࡓⅆᒣ⅊㉁◁ヨᩱ࡟ᑐࡋ࡚㸪ከᵝ࡞⥾ᅛࡵ᮲௳㸪≉࡟஝⇱ഃ㸪‵₶ഃ㸪㧗ᐦᗘഃࡢ⥾ᅛࡵ᮲௳㸦ࡍ࡞ࢃࡕ㸪ᶆ‽⥾ᅛࡵ᭤⥺ࡼࡾࡶୖഃ࡟఩⨨ࡍࡿⅬ㸧࡟╔┠ࡋ㸪ᾮ≧໬᢬ᢠࢆㄪ࡭ࡓࠋࡑࡢ⤖ᯝ㸪⣽⢏ศྵ᭷⋡ࡀቑຍࡋࡓሙྜ࡛ࡶ㸪༑ศ࡟⥾ࡵᅛࡵࡽࢀ࡚࠸ࢀࡤ㸪ࡼࡾ㧗࠸ᾮ≧໬᢬ᢠࢆ᭷ࡋ࡚࠸ࡿࡇ࡜ࡀ♧ࡉࢀ࡚࠸ࡿࠋࡇࡢࡇ࡜ࡣ㸪୍ぢࡍࡿ࡜㸪ከࡃࡢ᪤ ࡢ◊✲㸦౛࠼ࡤᩥ⊩13)㸧࡟࠾࠸࡚㸪㠀ረᛶ⣽⢏ศࡀቑ࠼ࡿ࡜ᾮ≧໬ᙉᗘࡀୗࡀࡿ࡜ሗ࿌ࡉࢀ࡚࠸ࡿࡇ࡜࡟཯ࡍࡿࡼ࠺࡟ᛮࢃࢀࡿࠋࡋ࠿ࡋ࡞ࡀࡽ㸪ᐇ㝿ࡢᣲືࢆ⣽㒊ࡲ࡛ぢࡿ࡜㸪ᾮ≧໬≉ᛶࡣ⥾ᅛࡵ≧ែ㸦⥾ᅛࡵᗘ࡜⥾ࡵᅛࡵ᫬㣬࿴ᗘ࡞࡝㸧࡟౫Ꮡࡋ㸪ࡑࡢᣲືࡣࡁࢃࡵ࡚」㞧࡛࠶ࡿࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋ༑ศ࡟⥾ࡵᅛࡵࡽࢀ࡚࠸࡚┦ᑐᐦᗘࡀ㧗࠸≧ែ࡟࠶ࡗࡓሙྜ㸪ࡑࡶࡑࡶᾮ≧໬ࡋ࡟ࡃ࠸ࡣࡎ࡛࠶ࡿࡋ㸪౛࠼ᾮ≧໬ࡋࡓ࡜ࡋ࡚ࡶ㸪ᩥ⊩14)࡞࡝ࢆཧ⪃࡟ุ᩿ࡉࢀࡿࡼ࠺࡟㸪ࢲ࢖࣮ࣞࢩࣙࣥࡢⓎ⏕࡟ࡼࡾὶື໬ࡏࡎ㸪ᾮ≧໬ࡋࡓᅵ◁ࡀ኱つᶍ࡟ᆅ୰࠿ࡽୗὶഃ࡟ὶฟࡍࡿࡇ࡜ࡶㄝ᫂ࡍࡿࡇ࡜ࡣ࡛ࡁ࡞࠸ࠋᐇ㝿㸪㔛ሯᆅ༊࡟࠾ࡅࡿཎ఩⨨ࡢ┦ᑐᐦᗘ࡜ࡋ࡚᥎

ࡉࢀࡓ್࡟㏆࠸┦ᑐᐦᗘ⣙40%ࡢ㔛ሯᆅ༊ࡢⅆᒣ⅊㉁◁ࡢ┒ᅵ࡟ᑐࡋ࡚㠀᤼Ỉ⧞㏉ࡋ୕㍈ヨ㦂㸦ᾮ≧໬ヨ㦂㸧ࢆᐇ᪋ࡋࡓ࡜ࡇࢁ㸪㣬࿴᮲௳ୗ࡛ࡢ㠀᤼Ỉ⧞㏉ࡋ㍕Ⲵ࡟ᑐࡋ࡚ᴟࡵ࡚ప
࠸ᾮ≧໬᢬ᢠࡋ࠿♧ࡉࡎ15)㸪ᆅୗỈ఩ࡀୖ᪼ࡍࡿ࡜ᾮ≧໬࣭ὶື໬ࡋࡸࡍ࠸┒ᅵ࡛࠶ࡗࡓࡇ࡜ࡀ♧၀ࡉࢀࡿࠋ୙༑ศ࡞⥾ᅛࡵ࡜㸪ᆅୗỈ఩ࡢୖ᪼ࡀ㸪㔛ሯ୍᮲ᆅ༊࡛ࡢᆅ┙ࡢኚ≧ࢆㄝ᫂ࡍࡿୖ࡛ࡢ࢝ࢠ࡟࡞ࡗ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡿࠋ୍㐃ࡢ⌧ᆅㄪᰝࡸᅵ㉁ヨ㦂⤖ᯝࢆ㋃ࡲ࠼࡚㸪Ꮿᆅ㐀ᡂ࠿ࡽ௒ᅇࡢᆅ㟈࡟ࡼࡿ⿕⅏ࡲ࡛ࡢ⤒㐣࡜ࡋ࡚᥎ࡉࢀࡿࢩࢼࣜ࢜ࢆᅗ 10((a)㹼
㹼(d)࡟ࡲ࡜ࡵࡿ࡜࡜ࡶ࡟㸪ᅵ◁ὶฟ࡜㝗ἐࡢ࣓࢝ࢽࢬ࣒ࡢㄝ᫂ࢆᅗ 11࡟♧ࡋࡓࠋ(i) ᨭ➖ⅆ⅏ὶሁ✚≀࠿ࡽ࡞ࡿྎᆅࡢᮎ➃࡟఩⨨ࡍࡿ௒ᅇࡢ⿕⅏ᆅᇦࡣ㸪ඖࠎᗄ➽ࡶࡢ㇂➽ࡀ้ࡲࢀ࡚࠸࡚㸪1970 ᖺ௦ᚋ༙࡟ษᅵ࣭┒ᅵ࡟ࡼࡾᏯᆅ࡜ࡋ࡚㐀ᡂࡉࢀࡓ㸦ᅗ 10(a), (b)㸧ࠋ(ii) ᤼Ỉᶵ⬟ࡢపୗ࡟ࡼࡾ㸦ࡶࡋࡃࡣ๓᪥ࡢྎ㢼 21 ྕࡢᙳ㡪୍࡛᫬ⓗ࡟㸧ᆅୗỈ఩ࡀୖ᪼ࡋ࡚࠸ࡓ࡜ࡇࢁ࡛ᆅ㟈ࡀⓎ⏕ࡋ㸪㇂ᇙࡵ┒ᅵࡀᾮ≧໬ࡋࡓ㸦ᅗ 10(c)㸧
ࠋ(iii) ഴᩳᆅ࡛࠶ࡿࡇ࡜࠿ࡽ㸪ᾮ≧໬ࡋࡓᅵ◁ࡀᆅ୰ࢆୗὶഃ࡟ὶࢀฟࡋ㸪ୗὶഃࡢᆅ⾲㠃໙㓄ࡀᛴ࡟࡞ࡾᅵ⿕ࡾࡀⷧࡃ࡞ࡿ࡜ࡇࢁ࡛ᆅ⾲㠃࡟ᄇฟࡋࡓ㸦ᅗ 10(d)㸧ࠋࡇࡢὶື໬ࡣ㸪⣽⢏ศࡀከ࠸┒ᅵᮦᩱ࡛࠶ࡿࡓࡵ
࡟㏱Ỉಀᩘࡀపࡃ㸪㐣๫㛫㝽Ỉᅽࡢᾘᩓ࡟᫬㛫ࢆせࡍࡿ≧ែ࡛࠶ࡗࡓࡇ࡜ࡶཎᅉ࡜࡞ࡗ࡚࠸ࡿྍ⬟ᛶࡀ࠶ࡿࠋ┒ᅵᮦᩱࡢ㏱Ỉಀᩘࡣ 10–7m/sec ࡢ࣮࢜ࢲ࣮࡛࠶ࡾ㸪඾ᆺⓗ࡞⢏ᚄࡀᩚࡗࡓ◁㸦౛࠼ࡤ㇏ᾆ◁㸧ࡢ㏱Ỉಀᩘࡼࡾࡶ 2 ࣮࢜ࢲ࣮௨ୖప࠸ࠋ(iv) ୖὶഃ࡛ࡣ㸪ᆅ୰ࡢᅵ◁ࡀὶฟࡋ࡚࡞ࡃ࡞ࡗ࡚ࡋࡲࡗࡓࡓࡵ࡟㸪య✚ࡢ႙ኻศࡔࡅᆅ┙⾲㠃࡟㝗ἐࡀⓎ⏕ࡋࡓ㸦ᅗ 10(d)㸧ࠋᅵ◁ࡀᄇฟࡋࡓୗ㒊࡛ࡣ㸪Ỉ㐨Ỉࡢὶୗ࡟ࡼࡿ࢞ࣜ౵㣗ࡀຍࢃࡾ㸪ᆅ┙࡟ⴭࡋ࠸ኚ
≧ࡀⓎ⏕ࡋࡓ㸦෗┿ 7 ཧ↷㸧ࠋᾮ≧໬ࡋ࡚ࡶ㸪ࡑࡢᅵ◁ࡀୗὶഃ࡟ྥ࠿ࡗ࡚ὶฟࡋ࡞࠿ࡗࡓሙᡤ࡛ࡣ㸪ᾮ≧໬ᚋࡢᅽᐦ᤼Ỉ࡟ࡼࡾ࠶ࡿ⛬ᗘࡢỿୗࡀⓎ⏕ࡋࡓࠋ10(a) Ꮿᆅ㛤Ⓨ๓ࡢཎᆅᙧ(b) ษᅵ࣭┒ᅵ࡟ࡼࡿᏯᆅ㐀ᡂ

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(d) ᾮ≧໬ᅵ◁ࡢὶฟ࡟ࡼࡿ㝗ἐ(c) ᆅୗỈ఩ࡢୖ᪼ᅗ 10 㔛ሯ୍᮲࡟࠾࠸࡚᥎

ᅗ 11 ᥎ࡉࢀࡓᆅ┙㐀ᡂ࠿ࡽኚ≧࡟⮳ࡿࡿࡲ࡛ࡢࢩࢼࣜ࢜ࡉࢀࡿᾮ≧໬࡟ࡼࡿᅵ◁ὶฟ࡜㝗ἐࡢ࣓࢝ࢽࢬ࣒䠒䠊ᆅᆅ┙⅏ᐖ䛾᚟ᪧ≧≧ἣ෗┿ 9 ࡣ㸪ཌ┿ᕝࡢ௬᚟ᪧ≧ἣ࡛࠶ࡾ෗
෗┿ 3 ࡢᶫୖ࠿ࡽୖὶഃ㸦෗┿ୖ᪉㸧ࢆ᧜ᙳࡋࡓࠋ௬᚟ᪧ࡛ࡣἙ㐨☜ಖࡀඃඛࡉࢀࡓࡓࡵ㸪⫹᣺࣭᪥㧗ᆅ༊ࡢ㔜ᶵࡢ኱༙ࡀ㞟ࡵࡽࢀᔂቯᅵ◁ࡢ㝖ཤࡀᛴࣆࢵࢳ࡛㐍ࡵࡽࢀࡓࠋᮏ᚟ᪧ࡟ࡘ࠸࡚ࡣ㸪ᆅ㟈Ⓨ⏕࠿ࡽ⣙ 1 ᖺ⤒㐣ࡋᚎࠎ࡟ᕤ஦ࡀ㐍ࢇ࡛࠸ࡿࠋ≉࡟㸪኱つᶍ࡞ᆅ⁥ࡾ࡟ࡼࡾⴭࡋ࠸Ἑ㐨㛢ሰࡀⓎ⏕ࡋࡓ᪥㧗ᖠෆᕝࡢୖὶ㒊࡛ࡣ㸪ᅜ┤㎄஦ᴗ࡜ࡋ࡚᚟ᪧᑐ⟇ࡀᐇ᪋ࡉࢀ࡚
ᅗ 12 ࡣ㸪2019 ᖺ 5 ᭶ᮎࡢ᚟ᪧ≧ἣ࡛࠶ࡿࠋᅗ
ᅗ 6 ࡜࡯ࡰྠࡌ఩⨨࡛ୖὶഃ࠿ࡽୗὶഃࢆಠ▔ࡋ࡚࠸ࡿࠋᅗ࠸ࡿࠋ᚟ᪧࡣ㸪᥀๐ᕤ㸪Ỉ㊰ᕤ㸦⣙ 830 m㸧㸪◁㜵ሖሐ㸦2 ᇶ㸧ࢆᵓ⠏ࡍࡿࡇ࡜࡟ࡼࡾ㸪Ἑ㐨☜ಖࡀ⾜ࢃࢀ࡚࠸ࡿࠋࡲࡓ㸪ཌ┿⏫ྜྷ㔝ᆅ༊ࡸᐩ㔛ᆅ༊ࡢᩳ㠃ᔂቯ⟠ᡤࡣ㸪໭ᾏ㐨࡟ࡼࡾ㡰ḟᩳ㠃Ᏻᐃᑐ⟇ᕤ஦ࡀᐇ᪋ࡉࢀࡿィ⏬࡛࠶ࡿࠋ11෗┿ 5 ཌ┿ᕝࡢ௬᚟ᪧ≧ἣ

ᅗ 12 ᪥㧗ᖠෆᕝୖὶ㒊ࡢ᚟ᪧ≧ἣ 6)୍᪉㸪ᮐᖠᕷΎ⏣༊࡛Ⓨ⏕ࡋࡓᾮ≧໬࡛᭱ࡶ⿕ᐖࡀⴭࡋ࠿ࡗࡓ㔛ሯ୍᮲ᆅ༊࡛ࡣ㸪ྠᵝࡢ⿕ᐖࡀⓎ⏕ࡋ࡞࠸ࡼ࠺࡟ᑐ⟇ᕤ஦ࡀ⾜ࢃࢀ࡚࠸ࡿࠋᾮ≧໬ᑐ⟇࡛ࡣ㸪ᾮ≧໬ࡑࡢࡶࡢࢆⓎ⏕ࡉࡏ࡞࠸ࡇ࡜ࡀ᭱ࡶ㔜せ࡛࠶ࡿࠋࡇࢀ࡟ຍ࠼㸪ᙜヱᆅ༊ࡣഴᩳᆅ࡛࠶ࡿࡇ࡜࠿ࡽ㸪᝿ᐃ௨ୖࡢᆅ㟈࡟ࡼࡾ㸪୓୍ᾮ≧໬ࡀⓎ⏕ࡋ࡚ࡶᅵ◁ὶฟࢆ㜼Ṇࡍࡿࡇ࡜ࡀ㸪᭷ຠ࡞ᑐ⟇࡜࡞ࡿࠋᮐᖠᕷࡀ➨ 4 ᅇᆅඖㄝ᫂఍࡛♧ࡋࡓᕤ஦ࡢᴫせ 16)ࢆᅗ-13 ࡟♧ࡍࠋࡲࡎ㸪ᾮ≧໬ࢆ㜵Ṇࡍࡿࡓࡵ࡟㸪ᆅ┙ᨵⰋ࡟ࡼࡾᆅ┙ࢆᅛ໬ࡉࡏࡿࡇ࡜࡟ຍ࠼㸪ᆅୗỈ఩ࢆపୗࡉࡏࡿࡇ࡜ࡶᑐ⟇ᕤ࡜ࡋ࡚♧ࡉࢀ࡚࠸ࡿࠋᇶᮏ࡜࡞ࡿᑐ⟇ᕤ஦ࡣ㸪ᕷ㐨ࡢ┤ୗ࡟ᑐࡍࡿ῝ᒙΰྜฎ⌮ᕤἲ࡟ࡼࡿᆅ┙ᨵⰋ࡛࠶ࡿࠋ῝ᒙΰྜฎ⌮ࡣ㐃⥆ࡍࡿᨵⰋయ࡟ࡼࡾᆅୗỈࡢὶࢀࡀ㜼ᐖࡉࢀࡿࡓࡵ㸪ᆅᇦࡢ᭱ୖὶഃࡢᕷ㐨࡜᭱ୗὶഃࡢ㔛ሯ୰ኸࡱ࡫ࡽබᅬ࡛ࡣᆅ┙ࢆ○▼࡟⨨ࡁ᥮࠼࡚᤼Ỉᒙ࡜ࡋ㸪ࡇࢀࢆἙᕝᬯῺ࡜┤⤖ࡉࡏࡿࡇ࡜࡟ࡼࡗ࡚㸪ᆅᇦ࡬ࡢᆅୗỈὶධࢆ㜵ࡄᑐ⟇࡜࡞ࡗ࡚࠸ࡿࠋ࡞࠾㸪῝ᒙΰྜฎ⌮ᨵⰋࡀᐇ᪋ࡉࢀࡿᆅᇦෆࡢᕷ㐨࡟ࡘ࠸࡚ࡣ㸪ᨵⰋ῝ᗘࡼࡾࡶୖ㒊ࡲ࡛ᆅୗỈ㠃ࡀୖ᪼ࡋ࡞࠸ࡼ࠺࡟㸪᤼Ỉ⏝ࡢᬯῺ⟶ࡀタ⨨ࡉࢀࡿࠋḟ࡟୓୍ᾮ≧໬ࡀⓎ⏕ࡋࡓ࡜ࡁࡢᅵ◁ὶฟ㜵Ṇᑐ⟇࡛࠶ࡿࡀ㸪ఫᏯࡢୗࡢᆅ┙ࡀᾮ≧໬ࡋ࡚ࡋࡲ࠺࡜㸪ᕷ㐨┤ୗ࡟సࡽࢀࡿ῝ᒙΰྜฎ⌮ࡢᨵⰋయࡔࡅ࡛ࡣഃ᪉ὶືࢆ㜼Ṇ࡛ࡁ࡞࠸ྍ⬟ᛶࡀ࠶ࡿࡇ࡜࠿ࡽ㸪ఫᏯࡢୗࡢᆅ┙࡟ࡘ࠸࡚ࡶᆅୗỈ఩௨ୗ࡜࡞ࡿྍ⬟ᛶࡀ࠶ࡿᆅ⾲㠃࠿ࡽ⣙ 3m ௨῝࡟ࡘ࠸࡚ࡣ㸪ᕷࡀᐇ᪋ࡍࡿᑐ⟇ᕤ஦ࡢ୍⎔࡜ࡋ࡚ᅛ໬ࢆᐇ᪋ࡋ㸪ᆅᇦࡢᆅ┙ࢆ୍యⓗ࡟ᅛ໬ࡍࡿᑐ⟇ᕤ஦ࡀィ⏬ࡉࢀ࡚࠸ࡿࠋᕷ㐨࠿ࡽᩳࡵ࣮࣎ࣜࣥࢢ࡛ὀධᅛ໬࡛ࡁࡿࡼ࠺࡟㸪⸆ᾮὀධᕤἲࡀ᥇⏝ࡉࢀࡿぢ㎸ࡳ࡛࠶ࡿࠋ࡞࠾㸪ఫᏯࡢഴᩳಟṇࡣᕷࡢᕤ஦ࡢᑐ㇟࡜ࡣ࡞ࡗ࡚࠸࡞࠸ࠋ

ᅗ-13 ᑐ⟇ᕤ஦ࡢᴫせ㸦ᮐᖠᕷ࡟ࡼࡿ➨ 4 ᅇᆅඖㄝ᫂఍㈨ᩱ 16) ࡼࡾ㸧

12䠓䠊䛚䜟䜚䛻2018 ᖺ 9 ᭶໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈ࡢᆅ┙⅏ᐖ࡟㛵ࡋ࡚㸪ཌ┿⏫ྜྷ㔝ᆅ༊㸪ᐩ㔛ᆅ༊㸪ᖠෆᆅ༊࠾ࡼࡧᮐᖠᕷΎ⏣༊㔛ሯᆅ༊࡟ࡘ࠸࡚⌧ᆅㄪᰝ➼ࢆᐇ᪋ࡋ㸪ࡇࢀࡽࡢㄪᰝ࠿ࡽ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈࡟ࡼࡿᆅ┙⅏ᐖࡢⓎ⏕せᅉ࡟ࡘ࠸᳨࡚ウࡋࡓ⤖ᯝ㸪௨ୗࡢ▱ぢࡀᚓࡽࢀࡓࠋࡲࡓ㸪ࡑࡢᚋࡢ᚟ᪧ≧ἣ࡜໭ᾏ㐨࡟࠾ࡅࡿᆅ㟈⅏ᐖ࡟ᑐࡍࡿ௒ᚋࡢㄢ㢟ࢆࡲ࡜ࡵࡿ࡜௨ୗࡢࡼ࠺࡛࠶ࡿࠋ1) ྜྷ㔝ᆅ༊ࡢᩳ㠃ᔂቯ࡟ࡘ࠸࡚ࡣ㸪ᶡ๓ⅆᒣ⅊ᒙ㸦Ta-d)ࡢ⾲ᒙᔂቯ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ2) ᖠෆᆅ༊ࡢᩳ㠃ᔂቯ࡟ࡘ࠸࡚ࡣ㸪኱つᶍ࠿ࡘᔂቯ㠃ࡀ῝࠸ᩳ㠃ᔂቯ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ3) ᖠෆᆅ༊ࡢ㝆ୗ㍍▼ሁ✚≀㸦ⅆᒣ⅊㸧ࡣ㸪ᜨᗞᓅࢆᄇฟ※࡜ࡍࡿ En-a ࡟㏆࠸ᛶ≧ࢆ♧ࡋࡓࠋࡇࡢࡇ࡜࠿ࡽ㸪ᜨᗞ㍍▼ᒙࡲ࡛㸪ࡍ࡭ࡾࡢᙳ㡪ࡢྍ⬟ᛶࡀ࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ4) ᚟ᪧᕤ஦ࡀ㐍ᤖࡋ࡞࠸せᅉ࡜ࡋ࡚㸪ᔂቯᩳ㠃ࡢᡤ᭷⪅㸦⟶⌮⪅㸧ࡀ㸪ᅜ㸪໭ᾏ㐨㸪ಶே➼㸪ከᒱ࡟ࢃࡓࡿࡓࡵ㸪ㄪᩚ࡟ከ኱࡞᫬㛫ࢆせࡋࡓࡇ࡜ࡸ㎰ᆅࡢᡤ᭷⪅ࡀᨾே࡜࡞ࡾ㸪㎰ᴗᚋ⥅⪅ࡀ୙ᅾ࡛᚟
ᪧᑐᛂ࡟ⱞ៖ࡋࡓࡇ࡜࡞࡝ࡀᣲࡆࡽࢀࡿࠋࡇࢀࡽࡢせᅉࡣ௒ᚋࡢ᚟ᪧᑐ⟇ࡢㄢ㢟࡛࠶ࡿࠋ5) Ύ⏣༊ࡢ┒ᅵᮦᩱࡣ㸪ᨭ➖࢝ࣝࢹࣛ࠿ࡽࡢⅆ○ὶሁ✚≀࡛㸪⣽⢏ศྵ᭷⋡ࡀ⣙ 40%࡜㧗࠸ࡇ࡜ࡀ≉ᚩ࡛࠶ࡿࠋᮐᖠᕷΎ⏣༊㔛ሯᆅ༊࡛Ⓨ⏕ࡋࡓ኱つᶍ࡞ᾮ≧໬⿕ᐖࡣ㸪ᆅ⾲㠃࡟ᄇ◁⑞ࡀ࡞ࡃ㸪୍ぢࡍࡿ࡜኱つᶍ࡞㝗ἐ࡟ぢ࠼ࡿ≉␗࡞⿕ᐖᙧែ࡛࠶ࡗࡓࠋࡇࡢࡼ࠺࡞⿕ᐖᙧែࡀⓎ⏕ࡋࡓࡢࡣ㸪┒ᅵᆅ༊ᮎ➃ࡢ໙㓄ࡀ኱ࡁ࠸ࡇ࡜ࡀཎᅉ࡜⪃࠼ࡽࢀࡿࠋ┒ᅵࡢୗὶഃᮎ➃࠿ࡽᾮ≧໬ᅵ◁ࡀ኱㔞࡟ᄇฟࡋࡓࡇ࡜࡟ࡼࡗ࡚㸪ୖὶഃ࡛ࡣᅵ◁ࡀᆅ୰ࢆὶୗࡋ࡚ኻࢃࢀ㸪ᆅ⾲㠃ࡀⴭࡋࡃ㝗ἐࡋࡓࠋㅰ㎡ᮏሗࢆࡲ࡜ࡵࡿ࡟࠶ࡓࡗ࡚㸪ᅵᮌᏛ఍໭ᾏ㐨ᨭ㒊࣭ᆅ┙ᕤᏛ఍ 2018 ᖺ 9 ᭶໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈⅏ᐖ⥭ᛴྜྠㄪᰝᅋࡢ㛵ಀྛ఩㸪ᮐᖠᕷࡼࡾ㸪㈨ᩱࢆࡈᥦ౪㡬࠸ࡓࠋࡇࡇ࡟グࡋ࡚㸪ㅰពࢆ⾲ࡋࡲࡍࠋཧ⪃ᩥ⊩1) ໭ᾏ㐨㛤Ⓨᒁ㸸࠙඲య∧ࠚᖹᡂ 30 ᖺ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈࡟ಀࡿ᚟ᪧ࣭᚟⯆➼ࡢ≧ἣ㸦➨ 4 ∧㸧㸪
https://www.hkd.mlit.go.jp/ky/saigai/splaat000001e1uy-att/splaat000001fkqu.pdf㸪2019.
2) Ẽ㇟ᗇ㸸ᖹᡂ 31 ᖺ 2 ᭶ 21 ᪥ 21 ᫬ 22 ศ㡭ࡢ⫹᣺ᆅ᪉୰ᮾ㒊ࡢᆅ㟈࡟ࡘ࠸࡚ 㹼ࠕᖹᡂ 30 ᖺ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈ࠖ࡟ࡘ࠸࡚㸦➨ 11 ሗ㸧㸪https://www.jma.go.jp/jma/press/1902/21a/kaisetsu201902212320.pdf㸪2019.
3) ⥲ົ┬ᾘ㜵ᗇ㸸ᖹᡂ 30 ᖺ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈࡟ࡼࡿ⿕ᐖཬࡧᾘ㜵ᶵ㛵➼ࡢᑐᛂ≧ἣ㸦➨ 35 ሗ㸧㸦ᾘ㜵ᗇᛂᛴᑐ⟇ᐊ㸸௧࿴ඖᖺ 8 ᭶ 20 ᪥ 13:00㸧
㸪
https://www.fdma.go.jp/disaster/info/items/ 190820hokkaidoujisinn35.pdf㸪2019.
4) ෆ㛶ᗓ㸸ᖹᡂ 30 ᖺ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈࡟ಀࡿ⿕ᐖ≧ἣ➼࡟ࡘ࠸࡚㸦ᖹᡂ 31 ᖺ 1 ᭶ 28 ᪥ 15:00 ⌧ᅾ㸧㸪
http://www.bousai.go.jp/updates/h30jishin_hokkaido/pdf/310128_jishin_hokkaido.pdf㸪2019.
5) ᅜᅵᆅ⌮㝔㸸ᖹᡂ 30 ᖺ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈࡟㛵ࡍࡿ᝟ሗࠊᩳ㠃ᔂቯ࣭ሁ✚ศᕸᅗ㸪ᅜᅵᆅ⌮㝔ᆅᅗ㸪
http://www.gsi.go.jp/BOUSAI/H30-hokkaidoiburi-east-earthquake-index.html#10㸪2019.
6) ᅜᅵ஺㏻┬㸸ᖹᡂ 30 ᖺ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈ࡢᔂቯ㠃✚ࡣ᫂἞௨㝆ࡢᆅ㟈⅏ᐖ࡛᭱኱㸦ᖹᡂ 30 ᖺ 10 ᭶ 5᪥㸧㸪http://www.mlit.go.jp/river/sabo/h30_iburitobu/181005_sediment_volume.pdf㸪2018.
7) ໭ᾏ㐨ࡢⅆᒣ⅊㉁ᅵࡢᛶ㉁࡜฼⏝࡟㛵ࡍࡿ◊✲ጤဨ఍㸸ᐇົᐙࡢࡓࡵࡢⅆᒣ⅊㉁ᅵ㹼≉ᚩ࡜タィ࣭᪋ᕤ㸪⿕⅏஦౛㹼㸪ᆅ┙ᕤᏛ఍໭ᾏ㐨ᨭ㒊ࠊp.14ࠊᰕ≧ᅗ No.25ࠊ2010.
8) ⏘ᴗᢏ⾡⥲ྜ◊✲ᡤᆅ㉁ㄪᰝ⥲ྜࢭࣥࢱ࣮㸸ᖹᡂ 30 ᖺ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈ࡢ㛵㐃᝟ሗࠊ⌧ᆅㄪᰝሗ࿌ࡑࡢ 2ࠕཌ┿⏫࡟࠾ࡅࡿ⾲ᒙᔂቯࠖ㸪https://www.gsj.jp/hazards/earthquake/hokkaido2018/hokkaido2018-07.html㸪

132019.
9) ᅜᅵ஺㏻┬໭ᾏ㐨㛤Ⓨᒁᐊ⹒㛤Ⓨᘓタ㒊㸸໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈 ᚟ᪧ࣭᚟⯆㸪ཌ┿ᕝỈ⣔◁㜵஦ᴗᡤࡢᕤ஦㸪኱つᶍἙ㐨㛢ሰᑐ⟇㸪https://www.hkd.mlit.go.jp/mr/kouhou/c5b1ee000000f4qa-att/c5b1ee000000f4sp.
pdf㸪2019.
10) ᅜᅵᆅ⌮㝔㸸ᮐᖠᕷᆅᇦࡢᆅᙧ᚟ඖᅗ㸦ᆅᙧศ㢮ᅗ㸧
http://www.gsi.go.jp/BOUSAI/H30-hokkaidoiburi-east-earthquake-index.html
11) Miura, S., Yagi, K. and Asonuma, T.: Deformation-strength evaluation of crushable volcanic soils by laboratory
and in-situ testing. Soils and Foundations, 43(4), 47–57, 2003
https://doi.org/10.3208/sandf.43.4_47
12) Matsumura, S., Tatsuoka, F.: Effect of compaction conditions and fines content on cyclic undrained strength ofsaturated soils, Soil Dynamics and Earthquake Engineering, 112, 152–161, 2018https://doi.org/10.1016/j.soildyn.2018.04.029
13) Cubrinovski, M., Rees, S. and Bowman, E.: Effects of Non-plastic Fines on Liquefaction Resistance of Sandy
Soils. In: Garevski, M., Ansal, A. (eds) Earthquake Engineering in Europe. Geotechnical, Geological, andEarthquake Engineering, Vol. 17, Springer, Dordrecht, 201014) Cubrinovski, M. and Ishihara, K.: Flow potential of sandy soils with different grain compositions. Soils andFoundations, 40(4), 103–119, 2000
https://doi.org/10.3208/sandf.40.4_10315) ᆅ┙ᕤᏛ఍㸸ᖹᡂ 30 ᖺ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈࡟ࡼࡿᆅ┙⅏ᐖㄪᰝᅋ᭱⤊ሗ࿌᭩, ➨ 4 ❶ ᮐᖠᕷ࣭໭ᗈᓥᕷࡢᆅ┙⿕ᐖ㸪pp.20–101㸪2019.
16) ᮐᖠᕷ㸸➨㸲ᅇΎ⏣༊㔛ሯᆅ༊ࡢᕷ⾤ᆅ᚟ᪧ࡟ྥࡅࡓᆅඖㄝ᫂఍㸪㓄௜㈨ᩱ㸪2000
https://www.city.sapporo.jp/kensetsu/stn/documents/dai4kaisetsumeikaisiryo_1.pdf

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