PE管Pipe-in-Pipe工法で管路更生を行った場合の本願寺水道の耐震性能評価

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ᱧผㇺᏒ㒐ἴ⺰ᢥ㓸 Vol. 6㧔2012ᐕ7᦬㧕 ޣ⺰ᢥޤ

2'▤2KRGKP2KRGᎿᴺߢ▤〝ᦝ↢ࠍⴕߞߚ႐วߩ

ᧄ㗿ኹ᳓㆏ߩ⠴㔡ᕈ⢻⹏ଔ

Evaluation of Anti-seismic Performance of Honganji Water Supply Pipeline

When it is Rehabilitated by Pipe-in-Pipe Method using PE Pipe

᩿ ା

1

_{࡮⨹Ꮉᤘᴦ}

2

Shin Katagiri and Shoji Arakawa

1_{៨ධᄢቇಎᢎ᝼ ℂᎿቇㇱㇺᏒⅣႺᎿቇ⑼㧔ޥ}_{572-8508 ᄢ㒋ᐭኢደᎹᏒᳰ↰ਛ↸17-8㧕}

Associate Professor, Setsunan University, Dept. of Civil and Environmantal Engineering

2_{ᩣᑼળ␠ᑪ⸳ᛛⴚ⎇ⓥᚲ ᄢ㒋ᧄ␠ ᛛⴚ⛔᜝ㇱ㧔ޥ}_541-0045_{㩷 ᄢ㒋ᐭ}_{ᄢ㒋Ꮢਛᄩ඙㆏ୃ↸㧕} Technical Director, CTI Engineering Co., Ltd㪅

In this study, anti-seismic performance of Honganji water supply pipelines when it is rehabilitated by PE pipe pipe-in-pipe method is investigated. First, basic behavior and response of installed PE pipes under seismic wave is assessed by performing a numerical analysis on the beam theory. On the basis of the results, a simple calculation model is examined to obtain the maximum PE pipe strain. Finally, anti-seismic performanze of a PE-pipeline installed in 4.6km length of Honganji water supply pipeline is calsulated by numerical simulations and introduced calculation model.

Keywords : Pipe-in-Pipe method, PE pipe, Water Supply Pipeline, Anti-seismic Performance, Response Analysis, Honganji

㧝㧚ߪߓ߼ߦ ᧄ㗿ኹ᳓㆏ ᧄ㗿ኹ᳓㆏ߣߪޔ᣿ᴦᤨઍߦ᧲ᧄ㗿ኹࠍἫἴ߆ࠄ቞ࠆߚ߼ߦᏓ⸳ߐࠇߚ▤〝ߢ޽ࠆ㧔࿑ 1㧕ޕ੩ㇺᏒߩな ਄߆ࠄℚℛḓ⇺᳓ࠍ᳓Ḯߣߒߡޔ⚂ 4.6km ߩ㈩᳓▤〝߇Ꮣ⸳ߐࠇޔな਄ߣ᧲ᧄ㗿ኹߩ⚂ 50m ߩ㜞ૐᏅࠍ೑ ↪ߒޔࡐࡦࡊࠍ೑↪ߔࠆߎߣߥߊ᳓࿶ࠍᓧࠆߎߣ߇ߢ߈ޔἴኂᤨߦ㔚ജଏ⛎߇஗ᱛߒߡ߽᧲ᧄ㗿ኹࠍἫἴ߆ ࠄ቞ࠆߚ߼ߩ᡼᳓ࠍⴕ߁ߎߣ߇಴᧪ࠆᣉ⸳ߢ޽ ࠆޕߎࠇߪᣣᧄೋߩ㊀ജᑼ㒐Ἣ⸳஻ߢ޽ࠅޔߘ ߩㄭઍᱧผㆮ↥ߣߒߡߩଔ୯ߪ㜞޿ޕߒ߆ߒޔ ㈩▤ߦ૶↪ߐࠇߚǾ300mm ࡈ࡜ࡦࠬ⵾㍌㋕▤ ߪޔ⃻࿷ߢߪ⣣㘩࡮⠧᧎ൻ߇ㅴߺṳ᳓߇↢ߓࠆ ߎߣ߆ࠄޔᧄ▤〝߳ߩ᳓ଏ⛎ߪ஗ᱛߐࠇߡ޿ࠆޕ ㄭઍᱧผㆮ↥ߣߒߡߩଔ୯߇㜞޿ᧄ㗿ኹ᳓㆏ ࠍᦝ↢ߒޔߘߩᯏ⢻ࠍ࿁ᓳߔࠆߎߣߪޔᱧผ⊛ ㆮ↥ଔ୯ߩ޽ࠆห▤〝ࠍᓟ਎ߦᱷߔߎߣߪ߽ߣ ࠃࠅޔ࿾㔡ᤨߦ߅ߌࠆ᧲ᧄ㗿ኹ㒐Ἣᣉ⸳ߩࡃ࠶ ࠢࠕ࠶ࡊᣉ⸳ߣߒߡߩᵴ↪ࠍน⢻ߣߔࠆޕߐࠄ ߦޔห▤〝߆ࠄಽጘ▤〝ࠍᣂ⸳ߔࠆߎߣߢޔᧄ 㗿ኹ᳓㆏๟ㄝߩᧁㅧኅደኒ㓸࿾ၞߦኻߒߡޔ࿾ _࿑_{1㧚ᧄ㗿ኹ᳓㆏}

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㔡ᤨἫἴߦኻᔕߒߚᶖἫᣉ⸳ࠍ㈩⟎ߔࠆߎߣ߇น⢻ᕈߣ⠨߃ࠄࠇޔㄭ㓞࿾ၞߩ㒐ἴ߳ߩነਈ߽ᦼᓙߐࠇࠆޕ 㧔㧕2'▤2KRGKP2KRGᎿᴺ ᚒ߇࿖ߦ߅ߌࠆ਄᳓㆏ၮᐙ▤〝ߩ⠴㔡ൻ₸ߪޔᐔᚑ ᐕᐲߢ⚂ 30.8㧑ߣૐ޿⁁ᴫߦ޽ࠆޕߘߩ৻ᣇߢޔ 㜞ᐲ⚻ᷣᚑ㐳ߦᏓ⸳ߐࠇߚ▤〝߇ᦝᣂᤨᦼࠍㄫ߃ࠆߥߤޔ▤〝ᦝᣂ੐ᬺߩ⊒↢߇ᄙߊ⷗ㄟ߹ࠇߡ߅ࠅޔߎࠇ ࠄߩ▤〝ࠍᦝᣂߔࠆ㓙ߦ⠴㔡ᕈߩ㜞޿▤〝ࠍណ↪ߔࠆߎߣ߇ޔ▤〝ߩ⠴㔡ൻࠍផㅴߔࠆߦ޽ߚࠅ㊀ⷐߢ޽ࠆޕ ߎ߁ߒߚ⢛᥊ߩਛޔㄭᐕ⠧᧎ൻߒߚ▤〝ߩᦝᣂᎿᴺߣߒߡޔޟPipe-in-PipeᎿᴺޠ߇ᵈ⋡ߐࠇߡ޿ࠆޕPipe-in-PipeᎿᴺߣߪޔᣢ⸳▤〝ߩ৻ㇱߦ⊒ㅴ┙ဒࠍ⸳ߌޔ⊒ㅴ┙ဒౝߢᣂ▤ࠍធวߒߥ߇ࠄᣢ⸳▤ౝߦ㗅ᰴᣂ▤ ࠍᝌ౉ᣉᎿߒޔᣢ⸳▤ߣᣂ▤ߩ㑆ߦߪ࠮ࡔࡦ࠻ࡒ࡞ࠢࠍలႯߔࠆᎿᴺߢ޽ࠆޕޟᣢ⸳▤ޠߪPipe-in-PipeᎿᴺ ߢߪޟᄖ▤ޠߣߥࠅޔޟᣂ▤ޠߪPipe-in-PipeᎿᴺߢᝌ౉ߔࠆޟౝ▤ޠߣߥࠆޕᧄᎿᴺߩ․ᓽߣߒߡߪޔએਅ ߩࠃ߁ߥ੐㗄߇᜼ߍࠄࠇࠆޕ ࡮ਥⷐ㆏〝ߢ੤ㅢ㊂߇ᄙ޿ߥߤߩℂ↱ߦࠃࠅ㐿೥Ꮏ੐߇࿎㔍ߥ႐วߥߤߦㆡ↪ߢ߈ࠆޕ ࡮ᣢ⸳▤ߣᣂ▤ߩੑ㊀᭴ㅧߣߥࠅޔᣂ▤߇ઁᎿ੐╬ߦࠃߞߡ៊்ߔࠆෂ㒾ᕈ߇ዋߥ޿ޕ ࡮Ꮣ⸳ᦧ߃ߣߪ㆑޿ޔ㆏〝ជ೥ࠍᦨዊ㒢ߦᛥ߃ࠆߎߣߦࠃࠅᎿ⾌ޔᎿᦼ౒ߦ೥ᷫߔࠆߎߣ߇ߢ߈ࠆޕ ࡮▤〝߇ユマߔࠆ㆏〝ਅߦޔᣂߚߦ▤〝ࠍၒ⸳ߔࠆࠬࡍ࡯ࠬࠍ⏕଻ߔࠆᔅⷐ߇ߥ޿ޕ ࡮㐿೥▎ᚲ߇┙ဒㇱߛߌߢ޽ࠅޔㅢᏱߩ㐿೥Ꮏ੐ߣᲧߴߡㄭ㓞ⅣႺ߳ߩ⽶⩄߇ዋߥ޿ޕ ࡮ᝌ౉ߔࠆᣂ▤ߪᣢ⸳▤ࠃࠅౝᓘ߇❗ዊߔࠆ߇ޔ▤ౝ㕙ߩ☻ᐲ߇ૐߊߥࠆߚ߼ޔㅢ᳓⢻ജߩૐਅߪዋߥߊޔ ᵹㅦࠍჇᄢߐߖࠆߎߣߢޔᔅⷐᵹ㊂ࠍ⏕଻ߔࠆߎߣ߇ߢ߈ࠆޕ ᧄᎿᴺࠍណ↪ߔࠇ߫ޔౝ▤ߪᄖ▤߇ήߊߡ߽࿯࿶ߦኻߔࠆචಽߥᒝᐲࠍ᦭ߔࠆޕߒߚ߇ߞߡޔᦝ↢ࠍᣉߒ ߚᤨὐߢߪޔᦝ↢▤ߩ࿯࿶ޔౝ᳓࿶ߦኻߔࠆᒝᐲߪᣢ⸳▤Ꮣ⸳ᤨߣห╬એ਄ߦᓳరߐࠇࠆޕߒ߆ߒޔߘߩ৻ ᣇߢޔ⠴㔡ᕈ⢻ߦߟ޿ߡߪᦝ↢ᓟߩ▤〝߇ᣢ⸳▤Ꮣ⸳ᤨߣห╬એ਄ߩᯏ⢻ࠍ଻ᜬߒߡ޿ࠆߎߣ߇චಽߦ⏕⹺ ߐࠇߡ޿ߥ޿ߩ߇⃻⁁ߢ޽ࠆޕ 㧔㧕ᧄ⎇ⓥߩ⋡⊛ߣ᭎ⷐ ᧄ⎇ⓥߢߪޔ㧔2㧕▵ߢㅀߴߚ PE ▤ Pipe-in-Pipe Ꮏᴺࠍޔᧄ㗿ኹ᳓㆏ߩᦝ↢ߦㆡ↪ߒߚ႐วߩห▤〝ߩ⠴ 㔡ᕈ⢻ࠍ⹏ଔߔࠆߎߣࠍ⋡⊛ߣߒߡ޿ࠆޕPipe-in-Pipe Ꮏᴺߩࠃ߁ߦޔᣢ⸳▤ౝߦᣂ▤ࠍᝌ౉ߔࠆᦝ↢▤Ꮏ ᴺࠍᣉߒߚ႐วߩ⠴㔡ᕈ⢻ࠍ⹏ଔߔࠆ⸳⸘⸘▚ᴺߦߟ޿ߡߪޔ⃻⁁ߢߪචಽߦ⏕┙ߐࠇߡ޿ߥ޿ޕᦝ↢Ꮏᴺ ߩ᥉෸߇Ყセ⊛ㅴࠎߢ޿ࠆਅ᳓㆏ߢߪޔౝ▤߇න⁛ߢ࿯࿶ߦኻߒߡᛶ᛫ߢ߈ࠆޟ⥄┙▤ޠ߇ਥᵹߢ޽ࠅޔ࿯ ࿶ߦኻߔࠆ⸳⸘ߢߪᄖ▤ߩᒝᐲነਈࠍోߊ⷗ㄟ߹ߕޔౝ▤ߛߌ߇න⁛ߢ࿯ਛߦၒ⸳ߐࠇߡ޿ࠆߣ⠨߃ߚ⸳⸘ ⸘▚ࠍⴕ߁ޕߎߩᣇ㊎ߦᓥߞߡޔ⠴㔡ᕈ⢻ߩ⹏ଔߦ߅޿ߡ߽ޔᣢ⸳▤߇ሽ࿷ߖߕౝ▤߇⋥ߦၒ⸳ߐࠇߡ޿ࠆ ⁁ᘒࠍᗐቯߒߚ⸳⸘⸘▚߇ⴕࠊࠇߡ޿ࠆ1㧕ޕߒ߆ߒޔᧄᴺߪ޽ߊ߹ߢ߽◲ᤃ⊛ߥ⸳⸘ߦ⇐߹ߞߡ޿ࠆޕ ᧄ㗿ኹ᳓㆏ࠍᦝ↢ߒޔߘߩᯏ⢻ࠍ࿁ᓳߐߖࠆߦ޽ߚߞߡߪޔਅ᳓▤〝ߦⷐ᳞ߐࠇࠆࠃࠅ߽㜞޿࡟ࡌ࡞ߢߩ ⠴㔡ᕈ⢻ߩᾖᩏ߇ᔅⷐߢ޽ࠆޕߥߗߥࠄ߫ޔ࿾㔡ᤨἫἴ߇↢ߓߚ႐วߢޔ߆ߟ᧲ᧄ㗿ኹ߇⃻᦭ߔࠆᶖἫᣉ⸳ ߩࡐࡦࡊߦേ૞ਇ⦟߇↢ߓࠆߣ޿߁㕖Ᏹᤨߦ߅޿ߡޔߘߩࡃ࠶ࠢࠕ࠶ࡊᣉ⸳ߣߒߡᯏ⢻ߒߥߌࠇ߫ߥࠄߕޔ ߆ߟᧄ㗿ኹ᳓㆏๟ㄝߩᧁㅧ૑ቛኒ㓸࿾ၞߢߩೋᦼᶖἫᵴേߦᵴ↪ߔࠆߎߣ߇ᦼᓙߐࠇࠆߚ߼ߢ޽ࠆޕ ߘߎߢޔᧄ⎇ⓥߢߪޔਅ᳓㆏ᦝ↢▤ߩ⠴㔡ᕈᾖᩏᣇᴺߣߪ⇣ߥࠅޔᄖ▤ߣౝ▤ߩ⋧੕૞↪ࠍ⠨ᘦߒߚ਄ߢޔ ౝ▤ߦߣߞߡࠃࠅ෩ߒ޿᧦ઙ⸳ቯߢߩ⠴㔡቟ోᕈߩᾖᩏࠍ⋡ᜰߒߚޕᬌ⸛ߩᣇᴺߪޔԘ߹ߕ PE ▤ Pipe-in-Pipe Ꮏᴺߦ߅޿ߡޔᄖ▤ߣౝ▤ߩⓨ㓗ߦలႯߐࠇࠆ࠮ࡔࡦ࠻ࡕ࡞࠲࡞ߣౝ▤ߣߩ㑆ߩ▤ゲᣇะ߳ߩ៺ᡂᛶ᛫ ജߦߟ޿ߡታ㛎⊛ߦ⺞ߴߚޕԙߘߩ⚿ᨐࠍ↪޿ߡޔౝ▤ߩゲᣇะ೰ᕈ߇࿾㔡ᤨߦ߅ߌࠆᄖ▤ߩ᜼േߦਈ߃ࠆ ᓇ㗀ࠍޔᣢ⸳▤ធวㇱߩᒁᛮ߈ࡃࡀ․ᕈߣߒߡ⷗ㄟߺޔ࿾㔡ᵄേࠍฃߌࠆ႐วߩᄖ▤ߩ᜼േࠍ⸘▚ߒޔᰴߦ ᓧࠄࠇߚᄖ▤ߩᄌ૏ಽᏓࠍౝ▤߳ߩ౉ജߣߒߡޔౝ▤ߦ↢ߓࠆ߭ߕߺಽᏓࠍ⸘▚ߒߚޕԚᰴߦޔᢙ୯⸘▚ߢ ᓧࠄࠇߚౝ▤ߩᦨᄢ߭ߕߺࠍ᳞߼ࠆߚ߼ߩ◲ᤃ⸘▚ࡕ࠺࡞ࠍ↪޿ޔᄖ▤⛮ᚻㇱߩિ❗ᄌ૏ߩ▚ቯ୯ߦኻᔕߒ ߚౝ▤߭ߕߺߩ⸘▚ᑼࠍឭ᩺ߒߡ޿ࠆޕԛᦨᓟߦޔ3 ᰴర⊛ߦ㈩▤ߐࠇߚᧄ㗿ኹ᳓㆏ߦޔ᳓㆏ᣉ⸳⠴㔡Ꮏᴺ ᜰ㊎ߢᗐቯߒߡ޿ࠆ࿾㔡ᵄേࠍ౉ജߣߒߡޔᵄേߩ౉኿ⷺᐲ࡮౉኿૏⟎㧔౉኿૏⋧㧕ࠍᄌൻߐߖޔᣢ⸳▤⛮ ᚻㇱߩિ❗㊂ߣౝ▤ᦨᄢ߭ߕߺࠍ⸘▚ߔࠆߎߣߢޔPE ▤ Pipe-in-Pipe Ꮏᴺߦࠃࠅᦝ↢ߐࠇߚᧄ㗿ኹ᳓㆏ߩ⠴ 㔡ᕈ⢻ࠍ⹏ଔߒߚޕ

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㧞㧚2'▤2KRGKP2KRGᎿᴺߦࠃࠆᦝ↢▤ߩၮᧄ⊛⠴㔡ᕈ⢻ߩ⹏ଔ 2'▤లႯ࠮ࡔࡦ࠻ࡕ࡞࠲࡞㑆ߩ▤ゲᣇะ៺ᡂᛶ᛫ജ PE▤Pipe-in-PipeᎿᴺߢߪޔᣢ⸳▤㧔ᄖ▤㧕ౝߦ৻࿁ࠅญᓘߩዊߐߥPE▤㧔ౝ▤㧕ࠍᝌ౉ߒߚᓟߦޔᄖ▤ 㧙ౝ▤㑆ߩⓨ㓗ߦ࠮ࡔࡦ࠻ࡕ࡞࠲࡞ࠍలႯߔࠆޕߎࠇߪޔᄖ▤ߩ⣣㘩߇ㅴⴕߒߚ႐วߢ߽ޔ࿯ਛߦⓨ㓗↢ߓ 〝㕙ߦᓇ㗀ࠍ෸߷ߔߎߣࠍ㒐ߋ⋡⊛߇޽ࠆޕ࿾㔡ᤨߦߪޔ࿾⋚ߩᄌ૏߇ᄖ▤ߦ૞↪ߒޔᄖ▤ߩᄌ૏߇ౝ▤ߦ ૞↪ߔࠆޕߎߩ㓙ޔౝ▤ߦߪ࠮ࡔࡦ࠻ࡕ࡞࠲࡞ߣߩ㑆ߩ៺ᡂᛶ᛫ജ߇૞↪ߔࠆޕߘߎߢޔ߹ߕߎߩ៺ᡂᛶ᛫ ജࠍታ㛎⊛ߦᛠីߒߚޕ ታ㛎ᣇᴺߩ᭎ⷐࠍ౮⌀㧝ߦ␜ߔޕࡏࠗ࠼▤㧔⚕⵾㧕ౝߦPE▤ࠍᝌ౉ߒޔⓨ㓗ࠍ࠮ࡔࡦ࠻ࡕ࡞࠲࡞ߢలႯߒ ߡ޿ࠆޕචಽߦ⎬ൻߒߚ⁁ᘒߢ㕒⊛タ⩄㊀⹜㛎ེߦ⸳⟎ߒޔਅ┵ߩ㍑⵾౞╴ߢࡕ࡞࠲࡞┵ㇱࠍᡰᜬߒޔPE▤ ਄ㇱߦ10mm/minߩㅦᐲߢ▤ゲᣇะᄌ૏ࠍਈ߃ޔᦨᄢ៺ᡂᛶ᛫ജࠍ⸘᷹ߒߚޕᧄታ㛎ߢߪޔలႯࡕ࡞࠲࡞ߣ PE▤ߣߩ㑆ߦޔ▤ゲᣇะ߳ߩ⋧ኻᄌ૏ࠍਈ߃ߡ޿ࠆޕߒߚ߇ߞߡޔᄖ▤ߩ᧚⾰߿೰ᕈ߇లႯࡕ࡞࠲࡞ߣPE ▤ߩ㑆ߩ៺ᡂᛶ᛫ജߦᓇ㗀ࠍ෸߷ߔߎߣߪߥ޿ޕ ⸘᷹⚿ᨐࠍ࿑2ߦ␜ߔޕታ㛎ߢߪలႯࡕ࡞࠲࡞ߦ੉ⵚߥߤߪ↢ߓߕޔ⸘᷹ߐࠇߡ޿ࠆ⩄㊀୯ߪޔPE▤ߣࡕ ࡞࠲࡞ߩ៺ᡂᛶ᛫ജߢ޽ࠆޕ▤ゲᣇะᄌ૏ߪޔ౮⌀1ߦ␜ߔ਄ㇱタ⩄ὐߢ⸘᷹ߒߡ޿ࠆߚ߼ޔPE▤ߣࡕ࡞࠲ ࡞ߩ⋧ኻᄌ૏ߣࡕ࡞࠲࡞߆ࠄ⓭߈಴ߒߡ޿ࠆPE▤ㇱߩ෼❗㊂߇฽߹ࠇߡ޿ࠆޕᦨᄢ៺ᡂᛶ᛫ജߪޔ࿑ਛߩ⎕ ✢ߢ␜ߔࠃ߁ߦ0.0068㨪0.0167N/mm2_{ߩ▸࿐ߢ޽ࠅޔᦨᄢ៺ᡂജ߇↢ߓࠆタ⩄ὐᄌ૏㊂ߪ0.8㨪2.7mmߢ޽ߞ} ߚޕਛૐ࿶ࠟࠬዉ▤⠴㔡⸳⸘ᜰ㊎2)㧔એਅޟࠟࠬᜰ㊎ޠߣ⒓ߔ㧕ߢߪޔၒ⸳▤߇࿾⋚߆ࠄฃߌࠆ࿾⋚᜔᧤ജ 㧔࿾⋚߆ࠄฃߌࠆ៺ᡂᛶ᛫ജ㧕ࠍޔ▤⴫㕙ߩṖࠄ߆ߐߦᔕߓߡ0.0098㨪0.0147N/mm2_{ߣ⸳ቯߒߡ޿ࠆ߇ޔ੹} ࿁ߩ᷹ቯ୯ߪޔ߶߷ห╬ߩ▸࿐ߢ޽ߞߚޕߒߚ߇ߞߡᄖ▤ߪޔ࿾⋚߆ࠄฃߌࠆ᜔᧤ജߣห╬ߩන૏㕙Ⓧᒰߚ ࠅߩ៺ᡂᛶ᛫ജࠍౝ▤߆ࠄฃߌࠆߎߣߦߥࠆޕ ౝ▤ߣߩ៺ᡂᛶ᛫ࠍ⠨ᘦߒߚᄖ▤⛮ᚻ․ᕈߩ⸳ቯ ᧄ㗿ኹ᳓㆏ߪޔࡈ࡜ࡦࠬ⵾ߩ㍌㋕▤ߢ᭴ᚑߐࠇߡ߅ࠅޔ ߘߩ⛮ᚻ᭴ㅧߪਇ᣿ߢ޽ࠆޕߚߛޔ⃻࿷਄᳓㆏↪ߣߒߡᐢ ߊ૶↪ߐࠇߡ޿ࠆ࠳ࠢ࠲ࠗ࡞㍌㋕▤ߩࠃ߁ߦࠧࡓベࠍ੺ߒ ߚធว᭴ㅧߢߪߥߊޔ౮⌀2ߦ଀␜ߐࠇࠆࠃ߁ߥශࠈ߁⛮ᚻ ߣ๭߫ࠇࠆ᭴ㅧߢ޽ࠆߣផኤߐࠇࠆޕߎߩ᭴ㅧߪޔ▤ߩᝌ ߒญవ┵ߦ㤗ᏓࠍᏎ߈ߟߌߡฃߌญౝߦᝌ౉ߒޔ㤗Ꮣߣฃ ߌญ┵ㇱߩ㑆ߦ㋦ࠍలႯߔࠆធ⛯ᣇᴺߢ޽ࠆޕߎߩ႐วޔ ⛮ᚻㇱࠍ᛼ߒㄟ߻㓙ߦߪᝌߒญ┵ㇱ߇ฃߌญౝㇱߦⴣ⓭ߔ ࠆ߇ޔᒁᛮߊ႐วߦߪᛶ᛫ജߪૐ޿ߣ⠨߃ࠄࠇࠆޕߐࠄߦޔ ల Ⴏ ࡕ ࡞ ࠲ ࡞ ߩ ┵ㇱࠍᡰᜬ PE ▤਄┵ㇱߦ ᄌ૏ࠍਈ߃ࠆ ౮⌀1 PE ▤-ࡕ࡞࠲࡞㑆ᛶ᛫ജ᷹ቯታ㛎㋦㤗 ౮⌀2 ශࠈ߁⛮ᚻߩ᭴ㅧ ࿑2 ᦨᄢ៺ᡂᛶ᛫ജ 㪇㪅㪇㪇㪇㪇㪅㪇㪇㪉㪇㪅㪇㪇㪋㪇㪅㪇㪇㪍㪇㪅㪇㪇㪏㪇㪅㪇㪈㪇㪇㪅㪇㪈㪉㪇㪅㪇㪈㪋㪇㪅㪇㪈㪍㪇㪅㪇㪈㪏㪇㪅㪇㪉㪇㪇㪅㪇㪈㪅㪇㪉㪅㪇㪊㪅㪇 ᦨᄢ៺ᡂᛶ᛫ജᤨ䈱࿶❗ᄌ૏㩿㫄㫄㪀 ៺ᡂᛶ᛫ജ㩿㪥㪆㫄㫄㪉㪀

(4)

ᧄ㗿ኹ᳓㆏ߩ႐วޔᏓ⸳ᓟߩ⚻ㆊᐕᢙ߇㐳޿ߚ߼㤗Ꮣ߇ഠൻߒޔᒁᛮ߈ᛶ᛫ജߪߐࠄߦૐߊߥߞߡ޿ࠆߣ⠨ ߃ࠄࠇࠆޕ ߘߎߢޔPE▤Pipe-in-PipeᎿᴺߢᦝ↢ߒߚᧄ㗿ኹ᳓㆏▤〝ߩ ⛮ᚻㇱᒁᛮ߈ᛶ᛫ߪޔౝ▤ߣలႯࡕ࡞࠲࡞ߣߩ៺ᡂᛶ᛫ߦࠃ ࠅ⊒⃻ߔࠆߣ઒ቯߒߚޕలႯࡕ࡞࠲࡞߆ࠄౝ▤ߢ޽ࠆPE▤ࠍ ᒁᛮߊ㓙ߩᛶ᛫ജߣᒁᛮ߈ᄌ૏ߩ㑐ଥߪޔࠟࠬᜰ㊎ߦḰ᜚ߒޔ ࿑3ߩࠃ߁ߦᮨᑼൻߐࠇࠆޕᄖ▤⛮ᚻㇱߩિ߮಴ߒ㊂ߪޔ2Ǭ ߦ⋧ᒰߔࠆޕ࿑ਛߩ⻉㊂ߩ㑐ଥߪࠟࠬᜰ㊎ࠃࠅޔᑼ㧔1㧕ߢ ਈ߃ࠄࠇࠆޕ 2

2 F

D

A E

G

S

W

ߎߎߢޔ

_D

㧦ౝ▤ߩᄖᓘޔ

_A

㧦ౝ▤ߩᢿ㕙Ⓧޔ

_E

㧦ౝ▤ߩᒢᕈଥᢙߢ޽ࠆޕ๭߮ᓘǾ300mmߩ㍌㋕▤ౝ ߦ⸳⟎ߔࠆౝ▤ߣߒߡޔᧄ⎇ⓥߢߪන⁛▤ߣߒߡၒ⸳ߐࠇߚ⁁ᘒߢߩ⠴㔡ᕈ⢻߇⏕⹺ߐࠇߡ޿ࠆᣣᧄ᳓㆏ද ળ㧔JWWA㧕ⷙᩰߩ๭߮ᓘǾ200mmPE▤㧔

D

=250mmޔ

A

=16209.7mm2_ޔ

_E

_=1000N/mm2_{㧕ࠍኻ⽎ߣߔࠆޕ} ᧄ᧦ઙߢ㧔1㧕ᑼࠃࠅᓧࠄࠇࠆ

2 G

㧔⛮ᚻᒁᛮ߈㊂㧕㧙

F

㧔ᛶ᛫ജ㧕㑐ଥߣޔߘࠇࠍࡃࠗ࡝࠾ࠕㄭૃߒߚ⛮ ᚻᒁᒛࠅ․ᕈࠍ࿑ 4(a)ߦ␜ߔޕ๟㕙៺ᡂജ㧦

W

ߦߟ޿ߡߪޔౝ▤߇ᄖ▤ౝߦ⌀⋥ߋߦ⸳⟎ߐࠇߥ޿ߎߣࠍ⠨ ᘦߔࠆߚ߼ߦޔࠟࠬᜰ㊎ߩಽጘ߿⛮ᚻᒛࠅ಴ߒߩ޽ࠆ႐วߩ࿾⋚᜔᧤ജߩഀࠅჇߒଥᢙࠍណ↪ߒޔ࿑ 2 ߩታ 㛎୯ߩᦨᄢ୯ࠍ 2 ୚ߒߚ୯㧦0.0334N/mm2_{ࠍណ↪ߒߚޕᄖ▤ߩ⛮ᚻ߇㔌⣕ߔࠆ႐วޔలႯࡕ࡞࠲࡞߇ᛶ᛫ߔ} ࠆߣ⠨߃ࠄࠇࠆ߇ޔᧄᎿᴺߢណ↪ߒߡ޿ࠆలႯࡕ࡞࠲࡞ߪᒝᐲ߇ᦼᓙߐࠇߡ޿ࠆ߽ߩߢߪߥߊޔᒁᒛࠅᒝᐲ ߪᭂ߼ߡૐ޿ޕߒߚ߇ߞߡޔߘߩᛶ᛫ജߦ㑐ߒߡߪήⷞߒߡ޿ࠆޕ ⛮ᚻ᛼ߒㄟߺ․ᕈߦߟ޿ߡߪޔ0.5mmߩ᛼ㄟߺߢᝌߒญ߇ฃߌญౝߦⴣ⓭ߔࠆߣ⠨߃ޔห࿑(b)ߩࠃ߁ߦ⸳ ቯߒߚޕᦛߍ․ᕈߦߟ޿ߡߪਇ᣿ߢ޽ࠆߚ߼ޔNTTߩ㍌㋕▤⛮ᚻߩ․ᕈ3)_{ࠍෳ⠨ߦห࿑(c)ߩࠃ߁ߦ઒ቯߒߚޕ} 㧔a㧕ᒁᛮ߈․ᕈ 㧔b㧕᛼ߒㄟߺ․ᕈ 㧔c㧕ᦛߍ․ᕈ ࿑4 ౝ▤߇޽ࠆ႐วߩᧄ㗿ኹ᳓㆏⛮ᚻ․ᕈߩ⸳ቯ ࿾㔡ᵄേࠍฃߌࠆᄖ▤ߣౝ▤ߩ᜼േ⸃ᨆ ࿑4ߦ␜ߔ⛮ᚻ․ᕈࠍ᦭ߔࠆ㍌㋕▤㧔ᄖ▤㧕߇࿾㔡ᵄേࠍฃߌࠆ᜼േࠍ⸃ᨆߒޔ▤〝ߩᄌ૏ಽᏓࠍ▚಴ߔ ࠆޕᰴߦޔᓧࠄࠇߚᄖ▤ᄌ૏ࠍ౉ജߣߒߡޔలႯࡕ࡞࠲࡞㧙ౝ▤㑆ߩ៺ᡂᛶ᛫ࠍ⠨ᘦߒߚ⸃ᨆߦࠃࠅౝ▤ߩ ߭ߕߺಽᏓࠍ▚಴ߔࠆޕ C࿾㔡ᵄേߩ⸳ቯ ᳓㆏ᣉ⸳⠴㔡Ꮏᴺᜰ㊎4)㧔એਅޟ᳓㆏ᜰ㊎ޠߣ⒓ߔ㧕ߢߪޔ▤ゲ㧔࿾⴫㕙㧕ߦኻߒߡ45ᐲߩ౉኿ⷺࠍ᦭ߔ ࠆᱜᒏᵄࠍ࿾㔡ᵄേߣߒߡᗐቯߒߡ޿ࠆޕߘߩᵄ㐳ߣᝄ᏷ߪޔ⴫ጀ࿾⋚ߩN୯ߣ⴫ጀ࿾⋚ෘߦࠃࠅቯ߹ࠆޕ ᧄ▵ߢߩ⸃ᨆߪޔᄖ▤⛮ᚻߩિ❗㊂ߣౝ▤߭ߕߺߣߩኻᔕ㑐ଥࠍ⺞ߴࠆߎߣࠍ⋡⊛ߣߒߡ޿ࠆߚ߼ޔ࿾㔡ᵄ േߦࠃࠆ࿾⋚߭ߕߺ߇ᦨᄢߣߥࠆ᧦ઙࠍ⸳ቯߒߚޕ࿑5ߪN୯ࠍ㧝㨪20ޔ⴫ጀ࿾⋚ෘࠍ5m㨪50m߹ߢᄌൻߐ ߖߡᓧࠄࠇࠆ࿾㔡ᵄേߩᵄ㐳ߣ࿾⋚߭ߕߺߩ㑐ଥࠍ␜ߒߡ޿ࠆޕ࿾⋚߭ߕߺߩᦨᄢߪ0.62%㧔࿑ਛغශ㧕ߢޔ ࿑3 ౝ▤ᒁᛮ߈ᤨߩᛶ᛫ജࡕ࠺࡞ F 㱠 L 㱐㧔1㧕 ࡃࠗ࡝࠾ࠕㄭૃ 㪇㪌㪇㪈㪇㪇㪈㪌㪇㪉㪇㪇㪉㪌㪇㪇㪈㪇㪉㪇㪊㪇㪋㪇㪌㪇 ᒁᛮ䈐㊂㩿㫄㪀 ᛶ᛫ജ㩿㫂㪥㪀㪇㪉㪇㪇㪇㪋㪇㪇㪇㪍㪇㪇㪇㪏㪇㪇㪇㪈㪇㪇㪇㪇㪈㪉㪇㪇㪇㪇㪇㪅㪇㪇㪉㪇㪅㪇㪇㪋 ᦛ䈕ⷺᐲ㩿㫉㪸㪻㪀䊝䊷䊜䊮䊃䋨㫂㪥䊶㫄㫄㪀㪇㪌㪇㪈㪇㪇㪈㪌㪇㪉㪇㪇㪇㪈㪉㪊㪋㪌 ᛼䈚ㄟ䉂㊂㩿㫄㪀 ᛶ᛫ജ㩿㫂㪥㪀 ࡃࠗ࡝࠾ࠕㄭૃ

(5)

ߘߩ㓙ߩᵄ㐳ߪ100mޔᝄ᏷ߪ0.28mߢ޽ߞߚޕ D㧕ᄖ▤ߩ᜼േ ᄖ▤ࡕ࠺࡞ߩ▤〝ో㐳ߪ141mߣߒޔ▤〝ਛᄩߦᦨᄢᒁ ᒛࠅ߭ߕߺ߇↢ߓࠆ૏⋧ߢ࿾⋚ᄌ૏ࠍਈ߃ߚޕ▤1ᧄߩ㐳 ߐ߇ਇ᣿ߢ޽ࠆߩߢޔ⃻࿷ߩ㍌㋕▤ߩᮡḰ㐳ߐߢ޽ࠆ 5.5mߦ⸳ቯߒߚޕ▤〝ߩਔ┵ߪ࿾⋚ᄌ૏߇࠯ࡠߣߥࠆߩ ߢޔ▤〝ਔ┵ߩ᜔᧤᧦ઙߪ࿾⋚ߦ࿕ቯߣߒߡ޿ࠆޕ⸃ᨆ ߪޔᒢᕈᐥ਄ߩߪࠅℂ⺰ߦၮߠߊ࿾ਛ▤〝ߩ᜼േ⸃ᨆࡊ ࡠࠣ࡜ࡓERAUL5)_ࠍ↪޿ߚޕ ᄖ▤ߩᄌ૏ಽᏓࠍ࿑6ߦޔᄖ▤⛮ᚻߩિ❗㊂ಽᏓࠍ࿑7 ߦ␜ߔޕ▤〝ਛᄩߩᄖ▤⛮ᚻߩᦨᄢિ߮಴ߒ㊂ߪ49.8 mm ߢ޽ߞߚޕ E㧕ౝ▤ߩ᜼േ ࿑6ޔ࿑7ߩࠃ߁ߦᓧࠄࠇߚᄖ▤ᄌ૏ࠍ౉ജߣߒߡޔౝ ▤߳ߩ߭ߕߺಽᏓࠍ▚಴ߒߚޕలႯࡕ࡞࠲࡞㧙ౝ▤㑆ߩ ⋧੕૞↪ࠍ⴫ߔ࿾⋚߫ߨߦߟ޿ߡߪޔᦨᄢ᜔᧤ജ㧔ᦨᄢ ៺ᡂജ㧕ࠍਛૐ࿶ࠟࠬዉ▤⠴㔡⸳⸘ᜰ㊎ߢⷙቯߐࠇࠆ▤ 〝㧙࿾⋚㑆ߩᮡḰ࿾⋚᜔᧤ജ㧔0.0098N/mm2㧕ࠍၮḰߦޔ ߘߩ0.5୚ޔ1.0୚ޔ2.0୚߅ࠃ߮5.0୚ߣᄌൻߐߖޔߎࠇࠍ ࡄ࡜ࡔ࡯࠲ߣߒߚ߭ߕߺಽᏓࠍ▚಴ߒߚޕߎߩᤨޔలႯ ࡕ࡞࠲࡞ߣᄖ▤ߩ㑆ߦߪ⋧ኻᄌ૏߇↢ߓߥ޿߽ߩߣ⠨߃ ߡ޿ࠆޕߎࠇߪޔ⣣㘩ߒߚᄖ▤ౝ㕙ߦኻߔࠆలႯࡕ࡞࠲ ࡞ߩ‛ℂ⊛ߥ࿕⌕ജ߇㜞޿ߣ⠨߃ࠄࠇࠆߚ߼ߢ޽ࠆޕᄖ ▤⛮ᚻㇱ߇㔌⣕ߔࠆ႐วޔࡕ࡞࠲࡞ߦߪ⛮ᚻㇱߢᒁᒛࠅ ⎕უ߇↢ߓಽ㔌ߔࠆޕ ౝ▤߭ߕߺಽᏓࠍ࿑8ߦ␜ߔޕ࿾⋚߭ߕߺߪ೨ㅀߩࠃ߁ ߦ0.62㧑ߢ޽ࠆޕPE▤߇⋥ធ࿾⋚ߦၒ⸳ߐࠇߡ޿ߚ႐วޔ ▤〝߭ߕߺߩᦨᄢ୯ߪ࿾⋚߭ߕߺએਅߣߥࠆޕᧄ⸃ᨆߩ ⚿ᨐޔలႯࡕ࡞࠲࡞㧙ౝ▤㑆ߩ៺ᡂജ߇ᮡḰ࿾⋚᜔᧤ജ ߩ5.0୚ࠍ⿥߃ࠆߣޔౝ▤ߩ߭ߕߺߪ⋥ߦၒ⸳ߐࠇߚ⁁ᘒ ࠃࠅ߽㜞ߊߥߞߡ޿ࠆޕ 㪇㪇㪅㪈㪇㪅㪉㪇㪅㪊㪇㪅㪋㪇㪅㪌㪇㪅㪍㪇㪅㪎㪇㪈㪇㪇㪉㪇㪇㪊㪇㪇㪋㪇㪇 ᵄ㐳䌌㩿㫄㪀 ࿾⋚ 䈵䈝䉂㱑㩿䋦㪀 ࿑5 ࿾㔡ᵄേߩ⸳ቯ 㪄㪍㪇㪄㪋㪇㪄㪉㪇㪇㪉㪇㪋㪇㪍㪇㪇㪉㪇㪋㪇㪍㪇㪏㪇㪈㪇㪇㪈㪉㪇㪈㪋㪇 Ꮐ┵䈎䉌䈱〒㔌䋨䌭䋩 ▤૕ ᄌ૏ ㊂䋨䌭䌭䋩 ࿑6 ᄖ▤ߩᄌ૏ಽᏓ 㪄㪉㪇㪇㪉㪇㪋㪇㪍㪇㪇㪉㪇㪋㪇㪍㪇㪏㪇㪈㪇㪇㪈㪉㪇㪈㪋㪇 Ꮐ┵䈎䉌䈱〒㔌䋨䌭䋩 ⛮ᚻ િ❗ ㊂䋨䌭䌭䋩 ࿑7 ᄖ▤⛮ᚻߩિ❗㊂ಽᏓ ᮡḰ࿾⋚᜔᧤ജ䈫䈱Ყ₸ 㪄㪇㪅㪉㪇㪅㪇㪇㪅㪉㪇㪅㪋㪇㪅㪍㪇㪅㪏㪇㪉㪇㪋㪇㪍㪇㪏㪇㪈㪇㪇㪈㪉㪇㪈㪋㪇 Ꮐ┵䈎䉌䈱〒㔌䋨䌭䋩 ▤ゲᣇ ะ䈵䈝䉂䋨䋦䋩㪇㪅㪌㪈㪅㪇㪉㪅㪇㪌㪅㪇 ࿑8 ౝ▤▤ゲᣇะ߭ߕߺಽᏓ

(6)

㧟㧚ౝ▤ᦨᄢ߭ߕߺߩ◲ᤃ▚ቯᑼ ࿑8ߦ␜ߔࠃ߁ߦޔౝ▤ߩ߭ߕߺߪᄖ▤⛮ᚻߩિ❗㊂ߦࠃࠅቯ߹ࠅޔ߹ߚߘߩ㊂ߪలႯࡕ࡞࠲࡞㧙ౝ▤㑆 ߩᦨᄢ៺ᡂᛶ᛫ജߦࠃࠅᄌൻߔࠆޕ࿾㔡ᵄേࠍฃߌࠆᄖ▤⛮ᚻߩિ❗㊂ߦߟ޿ߡߪޔ࿾㔡ᵄേߦࠃࠆ࿾⋚߭ ߕߺ߇▚ቯߐࠇߚ႐วޔᢙ୯⸃ᨆࠍ↪޿ߥߊߣ߽㧘⋥✢▤〝ߢ޽ࠇ߫ਅ᳓㆏ᣉ⸳ߩ⠴㔡ኻ╷ᜰ㊎ߣ⸃⺑6)_ߦ ␜ߐࠇࠆᑼ㧔2㧕ߦࠃࠅޔ◲ᤃ⊛ߦ▚಴ߔࠆߎߣ߇น⢻ߢ޽ࠆޕ

L

G H

ߎߎߢޔ

G

㧦⛮ᚻિ❗㊂ޔ

H

㧦࿾⋚߭ߕߺޔ

_L

㧦▤1ᧄߩ㐳ߐߢ޽ࠆޕ ߘߎߢޔᧄ┨ߢߪᄖ▤⛮ᚻߩિ❗㊂߆ࠄౝ▤ᦨᄢ߭ߕߺࠍ᭎⇛⊛ߦ▚಴ߔࠆ⸘▚ࡕ࠺࡞ࠍᬌ⸛ߔࠆޕ ౝ▤ᦨᄢ߭ߕߺߩ◲ᤃ⸘▚ࡕ࠺࡞ ᄖ▤ߩ⛮ᚻߩિ❗ߦኻߔࠆౝ▤ߩ᜼േߦߟ޿ߡߪ㧘࿾ഀࠇࠍኻ⽎ߣߒߚࠟࠬᜰ㊎ߩ⠨߃ᣇࠍၮḰߦߒ㧘࿑ 9ߩࠃ߁ߦࡕ࠺࡞ൻߔࠆߎߣ߇ߢ߈ࠆ㧚࿑ਛߩ

G

㧦ᄖ▤⛮ᚻߩિ❗㊂ޔ

W

㧦లႯࡕ࡞࠲࡞ߣౝ▤㑆ߩ៺ᡂᛶ ᛫ജޔLP㧦៺ᡂᛶ᛫ജߩવ㆐▸࿐߅ࠃ߮ǭmax㧦ౝ▤ᦨᄢ߭ߕߺߢ޽ࠆޕᧄࡕ࠺࡞߆ࠄޔǭmaxߩ▚಴ᑼ߇ᑼ 㧔3㧕ߩࠃ߁ߦᓧࠄࠇࠆޕ

EA

D

W

S

G

H

2 max ߎߎߢޔ

_D

㧦ౝ▤ߩᄖᓘޔ

_A

㧦ౝ▤ߩᢿ㕙Ⓧޔ

_E

㧦ౝ▤ߩᒢᕈ ଥᢙޔ

G

ޔ

W

㧦೨ㅀߩߣ߅ࠅߢ޽ࠆޕ ౝ▤ᦨᄢ߭ߕߺߩ◲ᤃ⸘▚ᑼߩᅷᒰᕈᬌ⸽ ࿑10ߪޔ2┨㧔3㧕ߢ␜ߒߚ⹦⚦⸃ᨆߦࠃࠆౝ▤ᦨᄢ߭ߕߺߣޔᑼ㧔3㧕ࠍ↪޿ߡᄖ▤⛮ᚻߩિ❗㊂߆ࠄ▚ ቯߒߚౝ▤ᦨᄢ߭ߕߺࠍᲧセߒߡ޿ࠆޕ࿑ਛߩᢙ୯ߪޔలႯࡕ࡞࠲࡞ߣౝ▤㑆ߩ៺ᡂᛶ᛫ജ(

W

)ߩᮡḰ࿾⋚ ᜔᧤ജ㧔0.0098N/mm2_{㧕ߦኻߔࠆᲧ₸ߢ޽ࠆޕ㧞┨ߢㅀߴߚታ㛎ߩ⚿ᨐޔ}

_W

_{ߪ0.0068㨪0.0167N/mm}2_ߩ▸࿐ߢ ޽ߞߚޕౝ▤߇ᄖ▤ౝߦ⌀⋥ߋߦ⸳⟎ߐࠇߥ޿ߎߣࠍ⠨ᘦߒޔࠟࠬᜰ㊎ߩ▤〝ߦಽጘ߇޽ࠅ߆ߟ⛮ᚻㇱߦᒛ ಴ߒㇱ߇޽ࠆ႐วߩ࿾⋚᜔᧤ജߩഀࠅჇߒଥᢙ㧞ࠍ⠨ᘦߒߡ߽ޔ਄⸥ߩᲧ₸ߪ3.4ߢ޽ࠆޕߎߩ᧦ઙߢߪޔ ᑼ㧔3㧕ߦࠃࠆౝ▤߭ߕߺߩ◲ᤃផቯ୯ߪ⸃ᨆ୯ߩ1.5୚⒟ᐲߣߥࠅޔᄢ߈߼ߩ୯ࠍਈ߃ㆊዊߥ୯ࠍ▚಴ߔࠆ ߎߣ߇ߥߊޔ◲ᤃ⊛ߥផቯᑼߣߒߡߪᅷᒰߢ޽ࠆߣ⠨߃ࠄࠇࠆޕ 㧠㧚ᧄ㗿ኹ᳓㆏㍌㋕▤〝ߩᔕ╵⸃ᨆߣౝ▤ߩ቟ోᕈᾖᩏ ᧄ┨ߢߪޔ4.6kmߦࠊߚࠆᧄ㗿ኹ᳓㆏3ᰴర㈩▤ࡕ࠺࡞ൻߒޔERAULࠍ↪޿ߚᢙ୯ߦࠃࠅᄖ▤ߢ޽ࠆ㍌㋕ ▤⛮ᚻߩિ❗㊂ࠍ▚ቯߔࠆޕᰴߦޔ㧔3㧕ᑼߦࠃࠅౝ▤ߢ޽ࠆPE▤ߩᦨᄢ߭ߕߺࠍ▚಴ߒޔPE▤ߩ⸵ኈ߭ߕ 㧔2㧕 ࿑9 ౝ▤߭ߕߺߩ⸘▚ࡕ࠺࡞ 㱠㪣㪧㪣㪧㱑㫄㪸㫏㱐㧔3㧕 ࿑10 ౝ▤ᦨᄢ߭ߕߺߩ⸘▚୯ 㪇㪅㪇㪇㪅㪌㪈㪅㪇㪈㪅㪌㪇㪅㪇㪇㪅㪌㪈㪅㪇㪈㪅㪌 ◲ᤃᑼ䈮䉋䉎ౝ▤ᦨᄢ䈵䈝䉂䋨㩼䋩 ⸃ᨆ䈮䉋䉎 ౝ▤ᦨᄢ䈵䈝䉂䋨㩼䋩 φ0.5φ1.0 φ2.0 φ5.0

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ߺߣᲧセߔࠆߎߣߢߘߩ቟ోᕈࠍ⹏ଔߔࠆޕ ౉ജ࿾㔡ᵄേߩ⸳ቯ ࿾㔡ᵄേߦߟ޿ߡߪޔᧄ㗿ኹ᳓㆏߇ㅢࠆ੖᧦ᄢᯅઃㄭ3࿾ ὐߩࡏ࡯࡝ࡦࠣ࠺࡯࠲㧔࿑11㧕ࠍ߽ߣߦޔ᳓㆏ᜰ㊎ߦḰ᜚ ߒߡᵄ㐳ߣᝄ᏷ࠍቯ߼ߚޕ ⸘▚ߩ⚿ᨐޔ࿾⋚ߩ࿕᦭๟ᦼ㧦1.64(s )ޔᵄ㐳㧦156.1(m)ޔ ᄌ૏ᝄ᏷㧔࡟ࡌ࡞ 2 ࿾㔡േ㧕㧦33.25(cm)߅ࠃ߮࿾⋚ᱡߺ㧦 0.67(㧑)ߣߥߞߚޕߥ߅ޔᒰ⹥࿾ၞߪ৻᭽࿾⋚ߢ޽ࠆߣ⠨߃ޔ ࿾⋚ߩਇဋ৻ᐲଥᢙߪ⠨ᘦߒߡ޿ߥ޿ޕ ᄖ▤ߩࡕ࠺࡞ൻ ᧄ㗿ኹ᳓㆏ߩ3ᰴర㈩▤ࡕ࠺࡞ࠍ࿑12ߦ␜ߔޕ࿑ߩ❑ゲߪ ᧲ᧄ㗿ኹ߆ࠄߩ㜞ߐࠍ␜ߒߡ޿ࠆޕᧄ▤〝ౝߦ5.5mߏߣߦޔ ࿑4ߦ․ᕈࠍ␜ߒߚ⛮ᚻࠍ㈩⟎ߒߡ޿ࠆޕ਄⸥ߩ࿾㔡ᵄേ ߪޔ࿑12ߩxゲࠍၮゲߣߒߡޔ౉኿ⷺࠍ0ᐲ㨪180ᐲ߹ߢ45 ᐲ㑆㓒ߢᄌൻߐߖߚޕ߹ߚޔ౉኿ᵄߩ૏⋧ߦߟ޿ߡߪ᧲ᧄ 㗿ኹߩ▵ὐࠍ1ߣߒޔ▵ὐ⇟ภࠍな਄ߦะߌߡ㗅ᰴჇടߐ ߖߡ޿ࠆޕߎࠇࠄߩ▵ὐ1㨪▵ὐ11߹ߢ࿾㔡ᵄേߩ౉኿૏ ⟎ࠍ⒖േߐߖࠆߎߣߢޔ▤〝ߦኻߔࠆ౉ജ૏⋧ࠍᄌൻߐߖ ߡ޿ࠆޕ▵ὐ1㨪▵ὐ11ߩ㑆㓒ߪ60.5mߢ޽ࠆޕ ᄖ▤⛮ᚻߩિ❗㊂ߣౝ▤ߩᦨᄢ߭ߕߺ ࿑13ߪޔ࿾㔡ᵄേߩ౉኿▵ὐᲤߩᦨᄢ⛮ᚻિ❗㊂ࠍ␜ߒ ߡ޿ࠆޕᄖ▤⛮ᚻߩᦨᄢિ߮಴ߒ㊂ߪ49mmߢ޽ࠆޕ౉ജ ߒߡ޿ࠆ࿾㔡ᵄേߦࠃࠆ࿾⋚߭ߕߺߪ0.67㧑ߢ޽ࠅޔ▤1ᧄߩ㐳ߐ߇5.5mߢ޽ࠆߎߣ߆ࠄޔ⋥✢▤〝ߢ޽ࠇ ߫⛮ᚻિ߮಴ߒ㊂ߩᦨᄢ୯ߪ36.85mmߣߥࠆޕᧄ㗿ኹ᳓㆏ߪᄙߊߩዮᦛㇱࠍ᦭ߔࠆ߇ޔዮᦛㇱㄭறߢߪ౉኿ ᵄߣ▤〝ߩᣇะ߇⋥੤ߔࠆ႐วߘߩ▤〝ߦߪᄌ૏߇↢ߓߕޔߘࠇߦ⋥ⷺߦធ⛯ߐࠇޔ࿾㔡ᵄേߩ౉኿ᣇะߦ ㄭ޿ⷺᐲࠍᜬߟ▤〝ߣߩ㑆ߦ࿾⋚߭ߕߺߩ㓸ਛ߇↢ߓࠆޕᵄേߩ౉኿ⷺߦᔕߓߡᄖ▤⛮ᚻિ❗㊂ߩಽᏓߪᄌ ൻߔࠆ߇ޔၮᧄ⊛ߦߪ▤〝ዮᦛㇱߢિ߮಴ߒ㊂߇㜞ߊߥࠆޕ ࿑14ߪޔ࿾㔡ᵄേߩ౉኿▵ὐᲤߩౝ▤߭ߕߺࠍ␜ߒߡ޿ࠆޕౝ▤ߩᦨᄢ߭ߕߺߪޔ2┨㧔3㧕ߢ␜ߒߚᢙ୯ ⸃ᨆࠍ3ᰴర㈩▤ߢታᣉߔࠆߎߣ߇ታ↪⊛ߢߥ޿ߚ߼ߦޔᧄ⺰ߢឭ᩺ߔࠆ㧔3㧕ᑼߢ◲ᤃ⊛ߦ▚ቯߒߚޕలႯ ࡕ࡞࠲࡞ߣౝ▤㑆ߩ៺ᡂᛶ᛫ജ

W

ߪޔᄖ▤ౝߦ⌀⋥ߋߦ㈩▤ߐࠇߥ޿᧦ઙࠍ⠨ᘦߔߴߊޔࠟࠬᜰ㊎ߩᦨᄢഀ ࠅჇߒଥᢙ2ࠍ⠨ᘦߒߡޔታ᷹ᦨᄢ୯ߩ2୚ߩ0.0334N/mm2ߣߒߚޕߘߩ⚿ᨐޔౝ▤ߢ޽ࠆ๭߮ᓘǾ200mmPE ▤ߩᦨᄢ߭ߕߺߪ1.2㧑ߣߥߞߚޕਅ᳓㆏↪ᦝ↢▤ߩ⠴㔡⸳⸘ᴺߦḰ᜚ߒޔPE▤߇⋥ߦၒ⸳ߐࠇߚ⁁ᘒߢߩ ⋥✢㈩▤ߩ▤૕߭ߕߺߪ࿾⋚߭ߕߺ0.67㧑એౝߢ޽ࠆޕᧄᴺߦࠃࠆ⸘▚୯ߪߘߩ⚂2୚ߩ⚿ᨐࠍਈ߃ߡ޿ࠆޕ ࿑13 ࿾㔡ᵄേߩ౉኿૏⟎࡮౉኿ⷺᐲߣᄖ▤⛮ᚻિ߮ߛߒ㊂ߩ㑐ଥ な਄ ᧲ᧄ㗿ኹ ࿑12 ᧄ㗿ኹ᳓㆏ߩ3ᰴరࡕ࠺࡞ ࡏ࡯࡝ࡦࠣ࿾ὐ ࿑11 ੖᧦ᄢᯅઃㄭߩࡏ࡯࡝ࡦࠣ࿑ N ୯ 10 30 50 㪇㪈㪇㪉㪇㪊㪇㪋㪇㪌㪇㪍㪇㪈㪉㪊㪋㪌㪍㪎㪏㪐㪈㪇㪈㪈 ࿾㔡ᵄേ䈱౉኿▵ὐ⇟ภ ᄖ▤ ⛮ᚻ 䈱િ 䈶㊂䋨㫄㫄䋩㪇㫦㪋㪌㫦㪐㪇㫦㪈㪊㪌㫦㪈㪏㪇㫦 ౉኿ⷺ

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࿑14 ࿾㔡ᵄേߩ౉኿૏⟎࡮౉኿ⷺᐲߣౝ▤߭ߕߺ㊂ߩ㑐ଥ ਅ᳓㆏↪ᦝ↢▤ߢߪޔᄖ▤ߩሽ࿷ࠍήⷞߒߡ߅ࠅޔ߹ߚ3ᰴర⊛㈩▤ࠍ⠨ᘦߒߡ޿ߥ޿ޕᧄ⺰ߢ↪޿ߚ⸘ ▚ᴺߪޔߎࠇࠄߩ᧦ઙࠍൊ᩺ߒߡ޿ࠆߚ߼ޔ㜞޿ౝ▤߭ߕߺࠍ▚಴ߒߡ޿ࠆޕߒ߆ߒߥ߇ࠄޔPE▤ߩ⸵ኈ߭ ߕߺߪ࡟ࡌ࡞2࿾㔡േኻᔕߢ6.0㧑ߢ޽ࠅޔߎࠇߣᲧセߔࠆߣᧄ㗿ኹ᳓㆏ࠍPE▤Pipe-in-PipeᎿᴺߢᦝ↢ߒߚ႐ วߩౝ▤ߪޔචಽߥ⠴㔡ᕈߩࠍ଻᦭ߒߡ޿ࠆߎߣ߇᣿ࠄ߆ߣߥߞߚޕ 㧡㧚߹ߣ߼ ᧄⓂߢߪޔㄭઍᱧผㆮ↥ߣߒߡߩଔ୯߇㜞ߊߘߩ଻ሽ߇ᦸ߹ࠇޔ߹ߚᯏ⢻ࠍ࿁ᓳߔࠆߎߣߦࠃࠅ᧲ᧄ㗿 ኹ࡮㒐ἴᶖἫᣉ⸳ߩࡃ࠶ࠢࠕ࠶ࡊᣉ⸳ߣߒߡߩᯏ⢻߇ᦼᓙߐࠇࠆᧄ㗿ኹ᳓㆏ࠍኻ⽎ߣߒߡޔߎࠇࠍPE▤ Pipe-in-PipeᎿᴺߢᦝ↢ߒߚ႐ว⠴㔡ᕈ⢻ߦߟ޿ߡᬌ⸛ߒߚޕᓧࠄࠇߚ⚿ᨐࠍએਅߦⷐ⚂ߔࠆޕ Ԙ లႯࡕ࡞࠲࡞㧙ౝ▤㑆ߩ៺ᡂᛶ᛫ജ․ᕈࠍᄖ▤⛮ᚻߩિ߮ᛶ᛫․ᕈߣߒߡਈ߃ࠆߎߣߢޔౝ▤ߩሽ࿷ ࠍ⠨ᘦߒߚᄖ▤ߩ࿾㔡ᤨᔕ╵⸘▚ࠍⴕߞߚޕ ԙ Pipe-in-PipeᎿᴺߢߩᄖ▤ߩᔕ╵ࠍ᳞߼ࠇ߫ޔౝ▤ߩᦨᄢ߭ߕߺࠍ◲ᤃ⊛ߦ▚ቯߔࠆߎߣ߇಴᧪ࠆ⸘▚ ࡕ࠺࡞ࠍឭ᩺ߒߚޕᧄࡕ࠺࡞ߦࠃࠆ⸘▚୯ߪޔ⋥✢▤〝ࠍኻ⽎ߣߒߚ⸃ᨆ୯ߦኻߒߡ߿߿㜞߼ߩ߭ߕ ߺ୯ࠍ▚಴ߔࠆߚ߼ޔ◲ᤃ⊛ߥ⠴㔡್ᢿߦߪචಽߦㆡ↪ߢ߈ࠆߣ⠨߃ࠆޕ Ԛ ᧄ㗿ኹ᳓㆏ߩᔕ╵⸃ᨆࠍⴕ޿ޔߘߩ⚿ᨐߣߒߡᓧࠄࠇߚ㍌㋕▤⛮ᚻㇱߩિ❗㊂߆ࠄޔPipe-in-PipeᎿᴺ ߢᣉᎿߐࠇߚౝ▤㧔PE▤㧕ߩᦨᄢ߭ߕߺࠍޔᧄⓂߢឭ᩺ߔࠆ◲ᤃ⸘▚ᑼߦࠃࠅ▚ቯߒߚޕߘߩ⚿ᨐޔ ᦨᄢ߭ߕߺߪ1.2㧑⒟ᐲߢ޽ࠅޔ࡟ࡌ࡞2࿾㔡േࠍኻ⽎ߣߒߚPE▤ߩ⸵ኈ߭ߕߺ6.0%ࠍਅ࿁ࠅޔචಽߥ ⠴㔡቟ోᕈࠍ᦭ߔࠆߎߣ߇ᬌ⸽ߐࠇߚޕ ෳ⠨ᢥ₂ 1) ␠࿅ᴺੱᣣᧄਅ᳓㆏දળ㧦▤߈ࠂᦝ↢Ꮏᴺߦ߅ߌࠆ⸳⸘࡮ᣉᎿ▤ℂࠟࠗ࠼࡜ࠗࡦ㧔᩺㧕㧘20011㧚 2) ␠࿅ᴺੱᣣᧄࠟࠬදળ㧦ਛૐ࿶ࠟࠬዉ▤⠴㔡⸳⸘ᜰ㊎㧘2004㧚 3) ⽷࿅ᴺੱ࿾㔡੍⍮✚ว⎇ⓥᝄ⥝ળ㧦࿾ਅ᭴ㅧ‛ߩ࿾⋚ᄌ⁁ኻ╷ߦ㑐ߔࠆ⺞ᩏ⎇ⓥ㧘1987㧚 4) ␠࿅ᴺੱᣣᧄ᳓㆏දળ㧦᳓㆏ᣉ⸳⠴㔡Ꮏᴺᜰ㊎࡮⸃⺑㧘2009㧚. 5) 㜞↰⥋㇢㧦࡜ࠗࡈ࡜ࠗࡦ࿾㔡Ꮏቇޔ౒┙಴ ᩣᑼળ␠ޔ1991㧚 6) ␠࿅ᴺੱᣣᧄਅ᳓㆏දળ㧦ਅ᳓㆏ᣉ⸳ߩ⠴㔡ኻ╷ᜰ㊎ߣ㐿⸳ޔ2006㧚㪇㪇㪅㪉㪇㪅㪋㪇㪅㪍㪇㪅㪏㪈㪈㪅㪉㪈㪅㪋㪈㪉㪊㪋㪌㪍㪎㪏㪐㪈㪇㪈㪈 ࿾㔡ᵄേ䈱౉኿▵ὐ⇟ภ ౝ▤ 䈱䈵䈝䉂㊂䋨䋦䋩㪇㫦㪋㪌㫦㪐㪇㫦㪈㪊㪌㫦㪈㪏㪇㫦 ౉኿ⷺ