ᧈݤԡጣᚘဒƴƓƚǔᢊែᲽ༿Ʒཞ Current state of RC slab in order to extend life cycle of bridges ੨ౡࠤ*ɼѨ෦**ɼҪ๛*** Kosuke Aoshima, Tadashi Abe, Yutaka Kawai *(ג)ίϯαϧλϯτ ϦεΫϚωδϝϯτۀ෦ʢ˟802-0062 Ԭݝभࢢখย৽ொ 1-11-4ʣ **ത()ɼຊେڭतɼੜ෦Պʢ˟275-8575 ઍ༿ݝशࢤࢢઘொ 1-2-1ʣ ***തɼຊେඇৗࢣߨۈɼੜ෦Պʢ˟275-8575 ઍ༿ݝशࢤࢢઘொ 1-2-1ʣ In the municipal corporation, in response to the "extension-of-life-span repair planning working-expenses auxiliary system" founded in the Heisei 19 fiscal year, a highway bridge extension-of-life-span repair plan is formulated, and the bridge check, the repair, and the construct substitute based on a plan are carried out. This paper attempts to report the damage condition of the RC slab through the bridge check by the extension-of-life-span repair plan. And presents some decision example of the actual extension-of-life-span repair plan. Key Words: preventive repair, RC slab, measure construction method, extension of life cycle Ωʔϫʔυɿ༧తमસɼচ൛ɼରࡦ๏ɼणԽ 2ᲨƸơNJƴ! ࠃ௨লɼฏ 19 ΑΓɼڞମͷ ڮྊཧʹɼདྷͷޙతͳमસٴͼՍସΒɼ ༧తͳमસʹΑΔणԽٴͼܭըతͳߋ৽ͷԁ ͳࡦసΛਤΓɼϥΠϑαΠΫϧίετʢҎԼɼ LCC ͱΔʣͷٴݮͼҡཧඅͷฏ४ԽͷݱͷΊʹɼ ʮणԽमસܭըࡦఆۀඅॿʯΛઃɽ ͷɼಓٴݝͼʹࢢ5 ʢฏ 19ʙ23 ʣɼͷଞͷࢢொଜʹʢฏ 19ʙ25 ʣͷݶાஔͱͳΓɼظʹ णԽमસܭըΛࡦఆΔମʹରࡦఆඅ༻Λ ॿΔͱͱʹɼͷޙͷܭըʹجमસٴͼՍସ ͷඅ༻ʹॿΔͷͰΔɽΕΛड ڞମͰɼʮಓ࿏ڮणԽमસܭըʯͷࡦఆ ࢪΕΔɽڞମͷಓ࿏ڮणԽमસ ܭըʹΔڮྊݕͷࢪɼಓٴݝͼ ࢢͰ 100ˋɼࢢொଜͰ 77ˋʢฏ 23 4 ࡏݱʣ ͱͳΔ 1) ɽ ຊใࠂͰɼڮྊʹݕڮྊ෦ࡐͷதͰଛই ஶʹΔ RC চ൛ʹɼݱঢ়ʹΔ RC চ൛ͷଛইঢ়گΛͱͱʹɼࡍͷಓ࿏ڮण Խमસܭըͷࡦఆʹड़ͷͰΔɽ ! 3ᲨᧈݤԡጣᚘဒʙಅƷಒᙲ! զࠃͷҰൠಓ࿏ͷશڮྊʢڮ15Ҏʣฏ 21 4 ࡏݱͰ 155,000 ڮΓɼݐઃ ޙ50 Λܦա ΔߴԽڮྊશڮྊͷ 8ˋͰΔɽ ߴԽڮྊɼ 10 ʹޙ26ˋɼ 20 ʹޙ53ˋʹՃɼશڮྊ ͷ 50ˋҎߴԽΛΔͱʹͳΔ 1) ɽ णԽमસܭըࡦఆۀͷഎʹܠɼͷΑʹ ߴࡁܦݐʹظઃΕڮྊͷଟɼʹޙҰ ੪ʹߋ৽ظΛΔͱʹͳΓɼདྷ௨Γͷޙతͳ मસٴͼՍସΛࢪ߹ʹɼΕΛཧΔ ڞମࡒతෛ୲ͷେݒ೦ΕΔͱ ΔɽɼདྷͷޙతͳमસٴͼՍସ Βɼ༧తͳमસʹΑΔणԽٴͼܭըతͳߋ৽ͷ ԁͳࡦసΛਤΔඞཁΔɽͰɼޙతमસ ٴͼ༧తमસͷΠϝʔδΛਤʵ1 ʹɽ ਤʵ1 ޙతमસٴͼ༧తमસͷ೦ ဇڼMDD ʙࢸႎጣ ʖ᧸ႎጣ ᳮ - 149 -
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Current state of RC slab in order to extend life cycle of bridges
In the municipal corporation, in response to the "extension-of-life-span repair planning working-expenses auxiliary system" founded in the Heisei 19 fiscal year, a highway bridge extension-of-life-span repair plan is formulated, and the bridge check, the repair, and the construct substitute based on a plan are carried out. This paper attempts to report the damage condition of the RC slab through the bridge check by the extension-of-life-span repair plan. And presents some decision example of the actual extension-of-life-span repair plan. Key Words: preventive repair, RC slab, measure construction method, extension of life cycle キーワード:予防的修繕,RC床版,対策工法,長寿命化
長寿命化修繕計画では,計画対象橋梁 776橋に対して,定期点検と健全度の診断を基に損傷の顕在化前に対策を講じる「予防的な修繕」の実施を計画し,限られた財源の中で,道路交通網の安全・安心を確保するための長寿命化,LCCの縮減及び維持管理費の平準化を行った. 予算の計画については,「短期計画」及び「中長期計画」の予算シミュレーションにより検討を行った.ここで,「短期計画」とは予防的な修繕への移行期間として,管理水準を満たさない健全度区分E,Cに対する修繕及び健全度区分 B の損傷に対する予防的な修繕についての計画である.次に,「中長期計画」とはマクロ的な視点で橋梁群の修繕費用の動向を把握した上で行う,短期