鉄道高架橋中間スラブを対象とした補強工法の開発 ー高強度繊維補強コンクリートによる補強工法ー

U.D.C 624.041.046

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せ ⣙㸸  㗰ᮦ⭉㣗➼࡟ࡼࡾ⤒ᖺຎ໬ࡀ⏕ࡌࡓ㧗ᯫᶫࢫࣛࣈ࡟ᑐࡋ࡚㸪㧗ᙉᗘ㸪㧗ࡌࢇᛶ࠿ࡘ㧗⪏ஂᛶࢆ᭷ࡍࡿ㧗ᙉᗘ⧄⥔⿵ᙉࢥࣥࢡࣜ ࣮ࢺࣃࢿࣝࢆ᪤タ㧗ᯫᶫࢫࣛࣈࡢୗ㠃࡟㓄⨨ࡋ㸪ࣔࣝࢱࣝὀධࢆ⾜࠺ࢫࣛࣈ⿵ᙉᕤἲࢆ㛤Ⓨࡋࡓࠋᮏ✏࡛ࡣ㸪⿵ᙉࢫࣛࣈࢆᶍᨃ ࡋࡓヨ㦂యࡢ༢⣧ᱱࡢ㟼ⓗ㍕Ⲵヨ㦂ࢆᐇ᪋ࡋ㸪⿵ᙉ࡟ࡼࡿ᭱኱⪏ຊࡢྥୖࢆ☜ㄆࡋࡓࠋࡲࡓ㸪ᐇ㝿ࡢࢫࣛࣈࡢ㍕Ⲵ≧ែࢆᶍࡋࡓ ୧➃ᅛᐃᱱࡢ㟼ⓗ㍕Ⲵヨ㦂ࢆᐇ᪋ࡋ㸪⿵ᙉ࡟ࡼࡿ᭱኱⪏ຊ࠾ࡼࡧ๛ᛶࡢྥୖࢆ☜ㄆࡋࡓࠋ 㺕㺎㺺㺎㺢㺼㸸  ⿵ᙉ㸪㧗ᯫᶫࢫࣛࣈ㸪ୗ㠃ቑཌᕤἲ㸪㧗ᙉᗘ⧄⥔⿵ᙉࢥࣥࢡ࣮ࣜࢺ ┠ ḟ㸸 ࡣࡌࡵ࡟                      ᐇ㦂⤖ᯝ       ⿵ᙉᕤἲࡢᴫせ                   ࡲ࡜ࡵ       ᐇ㦂ᴫせ                      ࡣࡌࡵ࡟ ㏆ᖺ㸪㕲㐨㧗ᯫᶫ࡟࠾࠸࡚ࡣ㸪㗰ᮦ⭉㣗➼࡟ࡼࡿࢫ ࣛࣈࡢ⤒ᖺຎ໬ࡀᠱᛕࡉࢀ࡚࠸ࡿ 1)ࠋ୍⯡ⓗ࡟㗰ᮦ⭉ 㣗➼࡟ࡼࡾຎ໬ࡋࡓࢫࣛࣈࡣ㸪ୗ㠃ቑཌᕤἲࡸ㗰ᯈ᥋╔ ᕤἲ࡟ࡼࡾ⿵ಟ࣭⿵ᙉࡉࢀࡿࠋࡇࢀࡽࡢᕤἲࡣ᪋ᕤ᫬ ࡟ᥭ㔜ᶵࢆᚲせ࡜ࡍࡿࡇ࡜ࡸ㸪ࡣࡘࡾసᴗࢆక࠺ࡇ࡜ ࠿ࡽ㸪㒔ᕷ㒊ࡸ⊃㝼⟠ᡤ࡛ࡢ᪋ᕤ࡟ࡣ᣺ື㸪㦁㡢ࡀၥ 㢟࡜࡞ࡿሙྜࡀከ࠸ࠋࡲࡓ㸪⿵ಟ࣭⿵ᙉᚋ࡟෌ຎ໬࡟ ࡼࡿ㗰ᮦ⭉㣗ࡀ㐍⾜ࡋ㸪ࢥࣥࢡ࣮ࣜࢺࡢ๤㞳࣭๤ⴠࡀ ⏕ࡌࡿࡔࡅ࡛࡞ࡃ㸪ᵓ㐀≀ࡀᡤせࡢ⪏ຊࢆ☜ಖ࡛ࡁ࡞ ࡃ࡞ࡿྍ⬟ᛶࡶᣦ᦬ࡉࢀ࡚࠸ࡿࠋ ௨ୖࡢࡇ࡜࠿ࡽ㸪ᮏ㛤Ⓨ࡟࠾࠸࡚ࡣ㸪ࡣࡘࡾసᴗࢆ ᚲせ࡜ࡏࡎ࠿ࡘ኱つᶍ࡞㔜ᶵࢆᚲせ࡜ࡋ࡞࠸᪋ᕤ᪉ἲ ࢆ᳨ウࡍࡿ࡜࡜ࡶ࡟㸪෌ຎ໬ࢆ㜵Ṇࡋ㸪⪏ຊྥୖࡀྍ ⬟࡞ࢫࣛࣈ⿵ᙉᕤἲࢆ㛤Ⓨࡍࡿࡇ࡜࡜ࡋࡓࠋ  ⿵ᙉᕤἲࡢᴫせ ⿵ᙉᕤἲࡢᴫせࢆᅗ 1 ࡟♧ࡍࠋᮏᕤἲࡣ㸪᪤タࢫࣛ ࣈࡢୗ㠃࡟࢔࣮ࣥ࢝㕲➽ࢆᡴタࡋ㸪⿵ᙉ㕲➽ࢆ㓄⨨ࡋ ࡓᚋ࡟㸪㧗ᙉᗘ⧄⥔⿵ᙉࢥࣥࢡ࣮ࣜࢺ㸦௨ୗ UFC ࣃࢿ ࣝ㸧ࢆྞୗࡆ㸪↓཰⦰ࣔࣝࢱࣝࢆὀධࡍࡿࡇ࡜࡛ࢫࣛ ࣈᗏ㠃ࢆ⿵ᙉࡍࡿ᪉ἲ࡛࠶ࡿࠋ᪤タࢫࣛࣈࡢࡣࡘࡾస ᴗࢆ୙せ࡜ࡍࡿࡓࡵ㸪࢔࣮ࣥ࢝㕲➽ࡢࡳ࡟ࡼࡾᛂຊఏ 㐩ࢆ⾜࠸㸪⿵ᙉ㒊࡜᪤タ㒊ࡢ୍య໬ࢆᅗࡿᵓ㐀࡛࠶ࡿࠋ UFC ࣃࢿࣝࡣᅗ 2 ࡟♧ࡍᵝ࡟㗰〇ࡢࣉ࣮ࣞࢺ࡜࣎ࣝࢺ ࡟ࡼࡾ㞄᥋ࡍࡿࣃࢿࣝ࡜᥋⥆ࡍࡿࡇ࡜࡛㸪ᛂຊࡢఏ㐩 ࢆྍ⬟࡟ࡍࡿ࡜࡜ࡶ࡟㸪ᗏᯟ࡜ࡋ࡚ࡶ౑⏝ࡍࡿᵓ㐀࡛ ࠶ࡿࠋ ࡲࡓ㸪㧗ᙉᗘ㸪㧗ࡌࢇᛶ࠿ࡘ⪏ஂᛶ࡟ඃࢀࡿ UFC ࣃ ࢿࣝࢆタ⨨ࡍࡿࡇ࡜࡛㸪⪏ຊࡢྥୖ࠾ࡼࡧ෌ຎ໬ࡢ㜵 Ṇࢆᅗࡗ࡚࠸ࡿࠋ          ᅗ  ᕤἲᴫせᅗ              ᅗ  8)& ࣃࢿࣝ   ᐇ㦂ᴫせ  ヨ㦂య  ヨ㦂యㅖඖࢆ⾲ 1 ࡟㸪ヨ㦂యᑍἲࢆᅗ 3 ࡟♧ࡍࠋ㟼 ⓗ㍕Ⲵヨ㦂࡟౑⏝ࡋࡓヨ㦂యࡣ 3 య࡛࠶ࡾ㸪ᐇ㝿ࡢ㧗 ᯫᶫࡢࢫࣛࣈࡢᙧ≧࠾ࡼࡧ㓄➽ࢆᶍᨃࡋ㸪ᶓ᩿᪉ྥࡢ ᩿㠃ࢆྲྀࡾฟࡋࡓᐇ኱ࣔࢹ࡛ࣝ࠶ࡿࠋ ᢏ⾡◊✲ᡤ ᅵᮌ◊✲ᐊ ᅵᮌᮏ㒊 ᅵᮌᢏ⾡タィ㒊 㕲➽ 㺱㺷㺞㺷 UFC㺨㺽㺦㺷 㗰〇ࣉ࣮ࣞࢺ 1 * 技術研究所 土木研究室 ** 土木本部 土木技術設計部 U.D.C 624.041.046

鉄道高架橋中間スラブを対象とした補強工法の開発

−高強度繊維補強コンクリートによる補強工法−

笠倉 亮太

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 前原  聡

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黒岩 俊之

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早川 健司

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伊藤 正憲

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ヨ㦂య No.1 ࡣ㸪༢⣧ᱱヨ㦂య࡜ࡋࡓࠋ᪤タࢫࣛࣈࡢ ᑍἲࡣᖜ 1100mm㸪㧗ࡉ 250mm㸪ࢫࣃࣥ 3000mm ࡛ ࠶ࡿࠋ㍈᪉ྥ㕲➽࡟ࡣ㸪SD345-D16-9 ᮏ㸪㓄ຊ㕲➽ࡣ SD345-D10@250mm ࡛࠶ࡿࠋ࡞࠾㸪᪤タࢫࣛࣈࡢࡏࢇ ᩿◚ቯࢆ㜵Ṇࡍࡿࡓࡵ㸪SD345-D10-4 ⤌ࢆ 300mm 㛫 㝸⛬ᗘ࡛㓄⨨ࡋ࡚࠸ࡿࠋ⿵ᙉࡣ᪤タࢫࣛࣈ࡜ UFC ࣃࢿ ࣝ㛫࡟㍈᪉ྥ⿵ᙉ㕲➽ SD345-D13-9 ᮏࢆタ⨨ࡋ㗰〇ࡢ ࣉ࣮ࣞࢺ࡟ࡼࡾᐃ╔ࡋࡓࠋ࡞࠾㸪UFC ࣃࢿࣝࢆྞୗࡆ ࡿ࢔࣮ࣥ࢝㕲➽ࡣ SD345-D10@275mm ࡜ࡋ↓ᶵ⣔࢔ ࣮ࣥ࢝ᮦ࡟ࡼࡾ࢔࣮ࣥ࢝ᅛᐃࡋࡓࠋ⿵ᙉ㒊ࡢቑཌ㔞 㸦UFC ࣃࢿࣝ㸩↓཰⦰ࣔࣝࢱࣝ㸧ࡣ 62mm ࡛࠶ࡿࠋ ヨ㦂య No.2㸪3 ࡣᐇ㝿ࡢ㍕Ⲵ≧ἣࢆᶍᨃࡋࡓ୧➃ᅛ ᐃᱱヨ㦂య࡜ࡋࡓࠋ᪤タࢫࣛࣈࡢᑍἲࡣᖜ 1100mm㸪 㧗ࡉ 250mm㸪ࢫࣃࣥ 4500mm㸪➼᭤ࡆ༊㛫 1500mm㸪 ᨭⅬ࡜ຍຊⅬ㛫ࡢ㊥㞳ࡣ 1500mm ࡛࠶ࡿࠋ᪤タࢫࣛࣈ ࡢ㍈᪉ྥୖഃ㕲➽࡟ࡣ㸪SD345-D16-5 ᮏ㸪ୗഃ㕲➽ࡣ 㗰ᮦ⭉㣗࡟ࡼࡿ᩿㠃ῶᑡࢆ᝿ᐃࡋ㸪SD345-D13-9 ᮏ࡜ ࡋࡓࠋ᩿㠃ῶᑡ⋡ࡣ 36%࡛࠶ࡿࠋࡲࡓ㸪ୗഃ㕲➽ࡣ 9 ᮏࡢ࠺ࡕ 4 ᮏࢆࣁࣥࢳ㒊௜㏆࡟࡚᭤ࡆୖࡆ࡚࠸ࡿࠋヨ 㦂య No.1 ࡜ྠᵝ࡟㸪᪤タࢫࣛࣈࡢࡏࢇ᩿◚ቯࢆ㜵Ṇࡍ ࡿࡓࡵ㸪SD345-D10-4 ⤌ࢆ 300mm 㛫㝸⛬ᗘ࡟࡚㓄⨨ ࡋ࡚࠸ࡿࠋ⿵ᙉࡣヨ㦂య No.1 ࡜ྠᵝ࡟ UFC ࣃࢿࣝ࡟ ࡼࡿ⿵ᙉ࡜ࡋ⿵ᙉ㒊ࡢቑཌ㔞ࡣ 62mm ࡛࠶ࡿࠋヨ㦂య No.2 ࡢ㍈᪉ྥ⿵ᙉ㕲➽ࡣ SD345-D13-10 ᮏ࡛࠶ࡾ㸪ࣁ ࣥࢳ㒊࡟↓ᶵ⣔࢔࣮ࣥ࢝ᮦ࡟ࡼࡾᅛᐃࡋࡓࠋ୍᪉㸪ヨ 㦂య No.3 ࡣ㍈᪉ྥ⿵ᙉ㕲➽ࢆ㓄⨨ࡏࡎ㸪UFC ࣃࢿࣝ ࡢᐃ╔ࢆᅗࡿࡓࡵ࡟㸪SD345-D13-10 ᮏࢆ UFC ࣃࢿࣝ ࡜ 500mm ࣛࢵࣉࡉࡏ࡚ࣁࣥࢳ㒊࡟࢔࣮ࣥ࢝ᅛᐃࡋࡓࠋ ⾲  ヨ㦂యㅖඖ                     D ヨ㦂య 1R      E ヨ㦂య 1R F ヨ㦂య 1R ᅗ  ヨ㦂యᑍἲ ᅽ⦰ഃ ᘬᙇഃ ✀㢮 ᚄ 㛫㝸 ⤌ᩘ 6' 6' ' ' ᮏ ᮏ 6' ' ᮏ  ⿵ᙉᮦ ഛ⪃ ㍈᪉ྥ ⿵ᙉ㕲➽   ༢⣧ᱱ ୧➃ᅛᐃᱱ ㍈᪉ྥ⿵ᙉ㕲➽࠶ࡾ ୧➃ᅛᐃᱱ ㍈᪉ྥ⿵ᙉ㕲➽࡞ࡋ 8)&ࣃࢿࣝ ᩿㠃ᙧ≧ ᖜ PP 㧗ࡉ PP ㍈᪉ྥ㕲➽ ࢔࣮ࣥ࢝ 㕲➽ ✀㢮 ᚄ ᮏᩘ ✀㢮 ᚄ ᮏᩘ ✀㢮 ᚄ ᮏᩘ 6' ' ᮏ 6' ' ᮏ    6' '  ⤌ ヨ㦂య1R ( ' )( $ $ & & ' )( % % ' ) ( ' )( $ $ & & ' ' )( () % % 㻿㻰㻟㻠㻡㻙㻰㻝㻜

࡞࠾㸪ᮏᕤἲࡣ᪋ᕤࡢ┬ຊ໬ࢆᅗࡿࡓࡵ࡟ࡣࡘࡾస ᴗࢆ⾜ࢃ࡞࠸ࡇ࡜ࢆ᝿ᐃࡋ࡚࠸ࡿࠋࡇࡢࡓࡵ㸪᪤タࢫ ࣛࣈ࡜⿵ᙉ㒊ࡢ௜╔ᛶ≧ࡀᐇ㦂ᅉᏊ࡜࡞ࡽ࡞࠸ࡼ࠺࡟㸪 ඲ヨ㦂య࡜ࡶ࡟࣏࢚ࣜࢳࣞࣥࣇ࢕࣒ࣝࢆタ⨨ࡋ⦕ษࢆ ⾜ࡗ࡚࠸ࡿࠋ  ౑⏝ᮦᩱ  ᮏᐇ㦂࡟࡚౑⏝ࡋࡓᮦᩱࡢᐇ㦂᫬ࡢヨ㦂⤖ᯝࢆ⾲ 2 ࡟♧ࡍࠋUFC ࣃࢿࣝࡣࠕ㉸㧗ᙉᗘ⧄⥔⿵ᙉࢥࣥࢡ࣮ࣜ ࢺࡢタィ࣭᪋ᕤᣦ㔪(᱌)ࠖ2)_{࡟㐺ྜࡋࡓᮦᩱࢆ⏝࠸࡚〇} సࡋࡓࠋࣃࢿࣝᑍἲࡣ 564mm™564mm™16mm ࡛࠶ ࡿࠋ  ㍕Ⲵ᪉ἲ  ᅗ 4 ࡟ ㍕ Ⲵ ⿦ ⨨ ࢆ ♧ ࡍ ࠋ ヨ 㦂 య No.1 ࡣ ࢫ ࣃ ࣥ 3000mm ࡢ୍Ⅼ㞟୰㍕Ⲵ࡜ࡋࡓࠋヨ㦂య No.2㸪3 ࡣ ࠕ㝈⏺≧ែタィἲ࡟ࡼࡿタィィ⟬౛ࠖ3)࡟♧ࡉࢀࡿ E-17 」⥺㍕Ⲵࡢ᥮⟬➼ศᕸⲴ㔜ࢆཧ⪃࡟㸪ᨭⅬ᮲௳ࢆ୧ ➃ᅛᐃ࡜ࡋ㸪➼᭤ࡆ༊㛫 1500mm㸪ᨭⅬ࡜ຍຊⅬ㛫㊥ 㞳 1500mm ࡢ 2 Ⅼ㞟୰㍕Ⲵ࡜ࡋࡓࠋࡲࡓ㸪ヨ㦂య No.2㸪3 ࡣ⿵ᙉ๓ࡢᵓ㐀ᛶ⬟࡜ᦆയᚋࡢ⿵ᙉຠᯝࢆ᳨ ドࡍࡿࡇ࡜ࢆ┠ⓗ࡜ࡋ࡚㸪ิ㌴㏻㐣᫬࡟㍈᪉ྥ㕲➽࡟ స⏝ࡍࡿᛂຊ≧ែࢆ᝿ᐃࡋࡓ᪤タࢫࣛࣈࡢ㍈᪉ྥ㕲➽ ࡀ 1200ȣ࡟㐩ࡍࡿࡲ࡛ࡢணഛ㍕Ⲵࢆ⾜࠸㸪㝖Ⲵᚋ⿵ᙉ ࡋ࡚ᮏ㍕Ⲵࢆ⾜ࡗࡓࠋ   ᐇ㦂⤖ᯝ  ᦆയࡢ㐍ᒎ≧ἣ ෗┿ 1㹼3 ࡟ྛヨ㦂యࡢ㍕Ⲵ⤊஢᫬ࡢ◚ቯ≧ἣࢆ㸪෗ ┿ 4㹼6 ࡟ྛヨ㦂యࡢ UFC ࣃࢿࣝࡢᦆയ≧ἣࢆ♧ࡍࠋ ヨ㦂య No.1 ࡣ㸪P=120kN ᫬࡟᪤タࢫࣛࣈ࡟㸪᭤ࡆ ࡦࡧ๭ࢀࡀⓎ⏕ࡋࡓࠋࡑࡢᚋ㸪P=140kN ᫬࡟⿵ᙉ㒊ࡢ ࣔࣝࢱࣝ࡟㸪P=220kN ᫬࡟ࡣ UFC ࣃࢿࣝ࡟᭤ࡆࡦࡧ ๭ࢀࡀⓎ⏕ࡋࡋࡓࠋ᪤タࢫࣛࣈࡢ㍈᪉ྥ㕲➽ࡣ P㸻 ⾲  ᮦᩱヨ㦂⤖ᯝ                   D ヨ㦂య 1RE ヨ㦂య 1Rࠊ ᅗ  ㍕Ⲵ⿦⨨      ෗┿  ◚ቯ≧ἣヨ㦂య 1R෗┿  ◚ቯ≧ἣヨ㦂య 1R෗┿  ◚ቯ≧ἣヨ㦂య 1R       ෗┿  ᦆയ≧ἣヨ㦂య 1R෗┿  ᦆയ≧ἣヨ㦂య 1R෗┿  ᦆയ≧ἣヨ㦂య 1R ᅽ⦰ᙉᗘ ࣖࣥࢢಀᩘ ᅽ⦰ᙉᗘ ࣖࣥࢢಀᩘ ᅽ⦰ᙉᗘ ࣖࣥࢢಀᩘ 㝆అᙉᗘ ࣖࣥࢢಀᩘ 㝆అᙉᗘ ࣖࣥࢢಀᩘ 㝆అᙉᗘ ࣖࣥࢢಀᩘ 1PP N1PP 1PP N1PP 1PP N1PP 1PP N1PP 1PP N1PP 1PP N1PP 1R             1R㸦ணഛ㍕Ⲵ㸧       1R㸦ᮏ㍕Ⲵ㸧       1R㸦ணഛ㍕Ⲵ㸧       1R㸦ᮏ㍕Ⲵ㸧       ࣔࣝࢱࣝ 8)& ㍈᪉ྥ㕲➽ ㍈᪉ྥ⿵ᙉ㕲➽ ヨ㦂య1R ࢥࣥࢡ࣮ࣜࢺ ࢔࣮ࣥ࢝㕲➽       㽢 ᮏ 㽢 ᮏ

340kN ᫬࡟㝆అࡦࡎࡳ࡟㐩ࡋ㸪㍈᪉ྥ⿵ᙉ㕲➽ࡣ P=396kN ᫬࡟㝆అ࡟⮳ࡗࡓࠋࡑࡢᚋ P=412kN ࡟࡚᭱ ኱Ⲵ㔜࡜࡞ࡾ㸪Ⲵ㔜ࡀ኱ࡁࡃపୗࡍࡿࡇ࡜࡞ࡃኚ఩ 100mm ࡟࡚㍕Ⲵࢆ⤊஢ࡋࡓࠋ㍕Ⲵ⤊஢᫬࡟ࡣ࢔ࣥ࢝ ࣮㕲➽ࡢᢤฟࡋ㸪◚᩿࠾ࡼࡧ UFC ࣃࢿࣝࡢ๤ⴠ➼ࡣ ㄆࡵࡽࢀ࡞࠿ࡗࡓࠋ ヨ㦂య No.2㸪3 ࡢணഛ㍕Ⲵ࡟࠾࠸࡚ࡣ㸪P=120kN ᫬࡟ࣁࣥࢳ㒊ୖഃ࡟᭤ࡆࡦࡧ๭ࢀࡀⓎ⏕ࡋࡓࠋヨ㦂య No.2 ࡣ P=160kN ᫬㸪ヨ㦂య No.3 ࡛ࡣ P=140kN ᫬ ࡟ࢫࣃࣥ୰ኸ㒊࡟࡚᭤ࡆࡦࡧ๭ࢀࡀⓎ⏕ࡋࡓࠋ୧ヨ㦂 య࡜ࡶ࡟ P=400kN ࡟࡚᪤タࢫࣛࣈࡢࢫࣃࣥ୰ኸ㒊ࡢ ㍈᪉ྥ㕲➽ࡀ 1200ȣ࡟㐩ࡋࡓࡓࡵணഛ㍕Ⲵࢆ⤊஢ࡋࡓࠋ ヨ㦂య No.2 ࡢᮏ㍕Ⲵ࡟࠾࠸࡚ࡣ P=140kN ᫬࡟ࢫࣃ ࣥ୰ኸ௜㏆ࡢ⿵ᙉ㒊ࡢࣔࣝࢱࣝ࡟᭤ࡆࡦࡧ๭ࢀࡀⓎ⏕ ࡋࡓࠋP=500kN ᫬࡟ࡣࢫࣃࣥ୰ኸ㒊ࡢ UFC ࣃࢿࣝ࡟ ࡦࡧ๭ࢀࡀⓎ⏕ࡋ㸪P=768kN ᫬࡟᪤タࢫࣛࣈࡢࣁࣥࢳ ୖഃ࡜ࢫࣃࣥ୰ኸୗഃࡢ㍈᪉ྥ㕲➽ࡀ㝆అ࡟⮳ࡗࡓࠋ ࡑࡢᚋ㸪P=848kN ᫬࡟᭱኱Ⲵ㔜࡜࡞ࡾ㸪ᅛᐃࣇ࣮ࢳࣥ ࢢࡢ࠿ࡪࡾࡀ๤ⴠࡋ㸪Ỉᖹ⛣ືࡀ⏕ࡌⲴ㔜పୗࡋࡓࠋ ◚ቯࡣᅛᐃ㒊࡟ࡼࡿࡶࡢ࡜⪃࠼ࡽࢀ㸪࢔࣮ࣥ࢝㕲➽ࡢ ◚᩿㸪UFC ࣃࢿࣝࡢ๤ⴠ➼ࡣㄆࡵࡽࢀ࡞࠿ࡗࡓࠋ  ヨ㦂య No.3 ࡢᮏ㍕Ⲵ࡟࠾࠸࡚ࡣ㸪ヨ㦂య No.2 ࡜ྠ ᵝ࡟ P=140kN ᫬࡟ࢫࣃࣥ୰ኸ௜㏆ࡢ⿵ᙉ㒊ࡢࣔࣝࢱ ࣝ࡟᭤ࡆࡦࡧ๭ࢀࡀⓎ⏕ࡋࡓࠋP=260kN ᫬࡟ࡣࢫࣃࣥ ୰ኸ㒊ࡢ UFC ࣃࢿࣝࡢ⥅┠࡟㛤ࡁࡀㄆࡵࡽࢀࡓࠋࡑ ࡢᚋ P=586kN ᫬࡟᪤タࢫࣛࣈࡢࢫࣃࣥ୰ኸ㒊ୗഃࡢ ㍈᪉ྥ㕲➽ࡀ㝆అࡋࡓࠋP=620kN ᫬࡟ࡣ UFC ࣃࢿࣝ ࡢ࣎ࣝࢺᏍ࠿ࡽࡢࡦࡧ๭ࢀࡀⓎ⏕ࡋࡓࠋP=643kN ᫬࡟ UFC ࣃࢿࣝ࡟᭤ࡆࡦࡧ๭ࢀࡀⓎ⏕ࡋ㸪ࣁࣥࢳ㒊ࡢୗഃ ࡟ᅽቯഴྥࡀࡳࡽࢀ㸪Ⲵ㔜ࡀపୗࡋࡓࠋ◚ቯࡣ᭤ࡆ◚ ቯ࡛࠶ࡿ࡜⪃࠼ࡽࢀ㸪࢔࣮ࣥ࢝㕲➽ࡢᢤฟࡋ㸪◚᩿࠾ ࡼࡧ UFC ࣃࢿࣝࡢ๤ⴠ➼ࡣㄆࡵࡽࢀ࡞࠿ࡗࡓࠋ  Ⲵ㔜㹼ኚ఩㛵ಀ  ᅗ 5㹼7 ࡟Ⲵ㔜㹼ኚ఩㛵ಀࢆ♧ࡍࠋᅗ୰࡟ࡣ⿵ᙉ๓ࡢ ᭤ࡆ⪏ຊ㸪⿵ᙉᚋࡢ᭤ࡆ⪏ຊࢆྜࢃࡏ࡚♧ࡍࠋ᭤ࡆ⪏ ຊࡢ⟬ᐃࡣࠕ㕲㐨ᵓ㐀≀➼タィᶆ‽࣭ྠゎㄝ ࢥࣥࢡࣜ ࣮ࢺᵓ㐀㒊ࠖ4)ࢆཧ⪃࡟㸪UFC ࣃࢿࣝࡢᘬᙇᙉᗘ≉ᛶ ࢆ⪃៖ࡋ㸪ᖹ㠃ಖᣢࡀᡂ❧ࡍࡿࡶࡢ࡜ࡋ࡚࣮࣓ࣔࣥࢺ ࢆ⟬ฟࡋ㸪ヨ㦂య No.1 ࡣࢫࣃࣥ 3000mm ࡢ༢⣧ᱱ㸪 ヨ㦂య No.2㸪3 ࡛ࡣࢫࣃࣥ 4500mm㸪➼᭤ࡆ༊㛫 1500mm ࡢ୧➃ᅛᐃᱱ࡜ࡋ࡚Ⲵ㔜ࢆ⟬ฟࡋࡓࠋ࡞࠾㸪 ᅗ 6㸪7 ࡟♧ࡍ᭤ࡆ⪏ຊ Pud+ࡣࢫࣃࣥ୰ኸ㒊ࡢ᭤ࡆ⪏ ຊࢆ㸪Pud㸫_{ࡣࢫࣃࣥ➃㒊ࡢ㈇ഃࡢ᭤ࡆ⪏ຊࢆ♧ࡋ࡚࠸} ࡿࠋ  ヨ㦂య No.1 ࡟࠾࠸࡚㸪⿵ᙉ๓ࡢ᭤ࡆ⪏ຊ࡜ᐇ㦂ࡢ᭱ ኱Ⲵ㔜ࢆẚ㍑ࡍࡿ࡜㸪⿵ᙉ๓ࡢ᭤ࡆ⪏ຊ࡟ᑐࡋ࡚ 2.21 ಸ㸪ヨ㦂య No.2 ࡛ࡣᅛᐃ㒊ࡀ◚ቯࡋࡓࡶࡢࡢ 2 .50 ಸ㸪 ヨ㦂య No.3 ࡛ࡣ㸪1.87 ಸ࡜࡞ࡾ㸪⪏ຊࡀྥୖࡋ࡚࠸ ࡿࡇ࡜ࡀ☜ㄆࡉࢀࡓࠋ  ࡲࡓ㸪ヨ㦂య No.2㸪3 ࡢⲴ㔜㹼ኚ఩㛵ಀࡣ P=200 kN ௨㝆࠿ࡽ⿵ᙉ࡟ࡼࡿ๛ᛶࡢྥୖࡀㄆࡵࡽࢀ㸪⿵ᙉ㒊 ࡀ๛ᛶࡢྥୖ࡟ᐤ୚ࡋ࡚࠸ࡿࡶࡢ࡜⪃࠼ࡽࢀࡿࠋ  ㍈᪉ྥ⿵ᙉ㕲➽ࡦࡎࡳ  ᅗ 8㹼9 ࡟㍈᪉ྥ⿵ᙉ㕲➽ࡢࡦࡎࡳศᕸࢆ㸪ᅗ 10 ࡟ UFC ࣃࢿࣝࡢᐃ╔ࡢࡓࡵࣁࣥࢳ㒊࡟࢔࣮ࣥ࢝ᐃ╔ࡋࡓ ᐃ╔㕲➽ࡢࡦࡎࡳศᕸࢆ♧ࡍࠋ  ヨ㦂య No.1㸪2 ࡢ㍈᪉ྥ⿵ᙉ㕲➽ࡢࡦࡎࡳࡣࢫࣃࣥ ᪉ྥ࡟ᑐࡋ࡚ࡦࡎࡳࡢ୙ᆒ⾮ࡀ⏕ࡌ࡚࠸ࡿࠋUFC ࣃࢿ ࣝࡀᘬᙇᛂຊࢆ㈇ᢸࡋ࡚࠸ࡿࡇ࡜ࢆ♧ࡋ࡚࠸ࡿࠋ             ᅗ  Ⲵ㔜㹼ኚ఩㛵ಀヨ㦂య 1R             ᅗ  Ⲵ㔜㹼ኚ఩㛵ಀヨ㦂య 1R             ᅗ  Ⲵ㔜㹼ኚ఩㛵ಀヨ㦂య 1R                   Ⲵ 㔜 N 1 ኚ఩PP ⿵ᙉᚋ 3XG N1⿵ᙉᚋ 3XG N1⿵ᙉ๓ 3PD[ N1 ț PP              Ⲵ 㔜 㸦 N1 㸧 ኚ఩㸦PP㸧 ⿵ᙉ๓ ⿵ᙉᚋ 3PD[ N1 ț PP 3XG _{N1⿵ᙉ๓} 3XG _{N1⿵ᙉᚋ} 3XG _{N1⿵ᙉᚋ}              Ⲵ 㔜 㸦 N1 㸧 ኚ఩㸦PP㸧 ⿵ᙉ๓ ⿵ᙉᚋ 3PD[ N1 ț PP 3XG _{N1⿵ᙉ๓} 3XG㸫 _{N1⿵ᙉᚋ} 3XG _{N1 ⿵ᙉᚋ}

 ୍᪉㸪㍈᪉ྥ⿵ᙉ㕲➽ࢆ㓄⨨ࡏࡎ㸪UFC ࣃࢿࣝࡢᐃ ╔ࡢࡓࡵ࡟࢔࣮ࣥ࢝ᅛᐃࡋࡓヨ㦂య No.3 ࡢᐃ╔㕲➽ࡣ 㕲➽ࡢࡘࡅ᰿㒊ศ࡟ࡦࡎࡳࡀ⏕ࡌ࡚࠾ࡾ㸪㍕Ⲵึᮇ࡟ ࡣᘬᙇࡦࡎࡳ࡛࠶ࡗࡓࡀ㸪⤊ᒁ᫬࡟ࡣᅽ⦰ࡦࡎࡳ࡜࡞ ࡗࡓࠋ  ᩿㠃ࡢࡦࡎࡳศᕸ  ᅗ 11㹼13 ࡟ࢫࣃࣥ୰ኸ㒊ࡢ᩿㠃㧗ࡉ᪉ྥࡢࡦࡎࡳศ ᕸࢆ♧ࡍࠋྛヨ㦂య࡜ࡶ࡟㸪㍕Ⲵึᮇ࠿ࡽࡦࡎࡳศᕸ ࡀ┤⥺࡟࡞ࡗ࡚࠾ࡽࡎ㸪࢔࣮ࣥ࢝㕲➽㛫࡛ࡣᖹ㠃ಖᣢ ࡢ௬ᐃࡀᡂࡾ❧ࡗ࡚࠸࡞࠸࡜⪃࠼ࡽࢀࡿࠋࡋ࠿ࡋ࡞ࡀ ࡽ㸪ᐇ㦂ࡢ᭱኱Ⲵ㔜ࡣ㸪⿵ᙉ๓ࡢ᭤ࡆ⪏ຊࢆ኱ࡁࡃୖ ᅇࡗ࡚࠾ࡾ㸪࢔࣮ࣥ࢝㕲➽ࡀ᪤タࢫࣛࣈ࡜⿵ᙉ㒊ࡢⲴ 㔜ࢆఏ㐩ࡋ࡚࠸ࡓ࡜⪃࠼ࡽࢀࡿࠋ  ࡲ࡜ࡵ ᮏㄽᩥ࡛ࡣ㸪᪤タࢫࣛࣈࡢୗ㠃࡟࢔࣮ࣥ࢝㕲➽ࢆᡴ タࡋ㸪UFC ࣃࢿࣝྞୗࡆ㸪⿵ᙉ㕲➽ࢆ㓄⨨ࡋࡓᚋ࡟㸪 ↓཰⦰ࣔࣝࢱࣝࢆὀධࡍࡿࡇ࡜࡛ࢫࣛࣈᗏ㠃ࢆ⿵ᙉࡍ ࡿ᪉ἲࡢ⿵ᙉຠᯝ࡟ࡘ࠸࡚㸪ᐇ㦂ⓗ᳨ウࢆ⾜ࡗࡓࠋ௨ ୗ࡟ᮏᐇ㦂ࡢ⠊ᅖෆ࡛ᚓࡽࢀࡓᡤぢࢆ♧ࡍࠋ             ᅗ  ㍈᪉ྥ⿵ᙉ㕲➽ࡢࡦࡎࡳศᕸヨ㦂య 1R             ᅗ  ㍈᪉ྥ⿵ᙉ㕲➽ࡢࡦࡎࡳศᕸヨ㦂య 1R             ᅗ  ㍈᪉ྥ⿵ᙉ㕲➽ࡢࡦࡎࡳศᕸヨ㦂య 1R             ᅗ  ࡦࡎࡳศᕸヨ㦂య 1R             ᅗ  ࡦࡎࡳศᕸヨ㦂య 1R             ᅗ  ࡦࡎࡳศᕸヨ㦂య 1R               ィ ఩⨨PP N1 N1 N1 N1 N1 N1 N1 Ȝ\ ȣ Ȝ\ ȣ               ࡦ ࡎ ࡳ 㸦 ȣ 㸧  ᐃ఩⨨㸦PP㸧 N1 N1 N1 N1 N1 N1 N1 Ȝ\ ȣ Ȝ\ ȣ               ࡦ ࡎ ࡳ 㸦 ȣ 㸧  ᐃ఩⨨㸦PP㸧 N1 N1 N1 N1 N1 N1 N1 Ȝ\ ȣ Ȝ\ ȣ            ࡦࡎࡳȣ N1 N1 N1 N1 N1 N1 N1                ୖ ⦕ ࠿ ࡽ ࡢ ㊥ 㞳 㸦 PP 㸧 ࡦࡎࡳ㸦ȣ㸧 N1 N1 N1 N1 N1 N1 N1                ୖ ⦕ ࠿ ࡽ ࡢ ㊥ 㞳 㸦 PP 㸧 ࡦࡎࡳ㸦ȣ㸧 N1 N1 N1 N1 N1 N1 N1 ࡦ ࡎ ࡳ ȣ  ୖ ⦕ ࠿ ࡽ ࡢ ㊥ 㞳  P P 

(1)ᮏᕤἲ࡟࡚⿵ᙉࡍࡿࡇ࡜࡛㸪᪤タࢫࣛࣈࡢ⪏ຊࡀྥ ୖࡍࡿࡇ࡜ࢆ☜ㄆࡋࡓࠋࡲࡓ㸪ᐇ㝿ࡢ᪤タࢫࣛࣈࡢⲴ 㔜᮲௳ࢆᶍࡋࡓሙྜ࡟࠾࠸࡚ࡶ㸪⪏ຊ࠾ࡼࡧ๛ᛶࡀྥ ୖࡍࡿࡇ࡜ࢆ☜ㄆࡋࡓࠋ (2)㍈᪉ྥ㕲➽ࡢࡦࡎࡳศᕸ࠿ࡽ㸪UFC ࣃࢿࣝࡣᘬᙇᛂ ຊࢆ㈇ᢸࡋ࡚࠸ࡿ࡜᥎ᐹࡉࢀࡿࠋ (3) ࣏࢚ࣜࢳࣞࣥࣇ࢕࣒ࣝࢆタ⨨ࡋ⦕ษࢆ⾜ࡗࡓࡓࡵ㸪 ヨ㦂యࡢ᩿㠃㧗ࡉ᪉ྥࡢࡦࡎࡳศᕸࡣ┤⥺࡟࡞ࡗ࡚࠾ ࡽࡎ㸪ᖹ㠃ᅗಖᣢࡢ௬ᐃࡣᡂ❧ࡋ࡚࠸࡞࠸࡜⪃࠼ࡽࢀ ࡿࠋࡋ࠿ࡋ࡞ࡀࡽ㸪ᮏᕤἲ࡟ࡼࡾ⪏ຊ࠾ࡼࡧ๛ᛶࡀྥ ୖࡋࡓࡇ࡜࠿ࡽ㸪࢔࣮ࣥ࢝㕲➽࡟ࡼࡾ⿵ᙉ㒊࡟Ⲵ㔜ࡢ ఏ㐩ࡀ⾜ࢃࢀ࡚࠸ࡓ࡜⪃࠼ࡽࢀࡿࠋ ௨ୖࡢࡼ࠺࡟㸪ᮏᕤἲ࡟࡚⿵ᙉࡋࡓ᪤タ㧗ᯫᶫࢫࣛ ࣈࡣ㸪⪏ຊ㸪๛ᛶࡢྥୖࡀㄆࡵࡽࢀ㸪㗰ᮦ⭉㣗➼࡟ࡼ ࡾຎ໬ࡋࡓሙྜ࡟᭷ຠ࡞⿵ᙉᕤἲ࡛࠶ࡿࡇ࡜ࡀ♧ࡉࢀ ࡓࠋ௒ᚋ࡟ࡴࡅ࡚㸪⪏ຊホ౯࠾ࡼࡧタィᡭἲࡢ☜❧ࡀ ᚲせ࡛࠶ࡿ࡜⪃࠼ࡿࠋ  ㅰ ㎡ ᮏᐇ㦂ࡣ㸦බ㈈㸧㕲㐨⥲ྜᢏ⾡◊✲ᡤẊ࡜ඹྠ◊✲࡟ࡼࡾᐇ᪋ࡋࡓࡶࡢ࡛࠶ࡾ㸪ከ኱࡞ࡿࡈ༠ຊࢆ㡬ࡁࡲࡋࡓࠋࡇࡇ࡟㛵ಀ⪅࡟ឤ ㅰࡢពࢆ⾲ࡋࡲࡍࠋ ཧ⪃ᩥ⊩ 1㸧㧗ᶫ ㈗ⶶ㸪ῲୖ ⩧ኴ㸪㛵᰿ ᝋኵ: ⤒ᖺ㌶㐨ࢫࣛࣈࡢ᭤ࡆ⪏ຊࡢ᳨ウ㸪ᅵᮌᏛ఍➨ 65 ᅇᖺḟᏛ⾡ㅮ₇఍ㅮ₇ᴫせ㞟 ➨ 5 㒊㸪 Vol.65㸪pp719-720㸪2010.9 2㸧㸦♫㸧ᅵᮌᏛ఍:ࢥࣥࢡ࣮ࣜࢺࣛ࢖ࣈ࣮ࣛࣜ113 ㉸㧗ᙉᗘࢥࣥࢡ࣮ࣜࢺࡢタィ࣭᪋ᕤᣦ㔪㸪2004.9 3㸧㸦㈈㸧㕲㐨⥲ྜᢏ⾡◊✲ᡤ:㝈⏺≧ែタィἲ࡟ࡼࡿタィィ⟬౛ RC ࣮࣓ࣛࣥ㧗ᯫᶫ㸪1996.3 4㸧㸦㈈㸧㕲㐨⥲ྜᢏ⾡◊✲ᡤ:㕲㐨ᵓ㐀≀➼タィᶆ‽࣭ྠゎㄝ ࢥࣥࢡ࣮ࣜࢺᵓ㐀≀㸪2004.4

DEVELOPMENT OF SLAB REINFORCEMENT METHOD

THAT TARGETS THE RAILWAY VIADUCT

K.Ryouta, S.Maehara, T.Kuroiwa

K.Hayakawa, and M.Ito

We have developed a reinforcement method for the existing viaduct slab by high-strength fiber-reinforced concrete panels with high strength, high durability and high toughness. In this paper, we conducted a static loading tests of simple beam that reinforced by this method. As a result, This beam was improved maximum strength by reinforcement. We also conducted the static load test at fixed beam that mimics the loading state of the viaduct slab, it was confirmed improvement in rigidity and maximum strength by reinforcement.