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港湾空港技術研究所資料「2011年東日本大震災による港湾・海岸・空港の地震・津波被害に関する調査速報」(1)(PDF/10.3MB)

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(1)ISSN1346-7840. 港湾空港技術研究所 資料 TECHNICAL NOTE OF THE PORT AND AIRPORT RESEARCH INSTITUTE. No.1231. April 2011. 2011 年東日本大震災による港湾・海岸・空港の地震・津波被害に関する調査速報. 高橋 長尾. 重雄 戸田. 和彦 菊池. 喜昭. 菅野. 高弘. 栗山. 善昭. 山﨑. 浩之. 毅 下迫健一郎 根木. 貴史. 菅野. 甚活. 富田. 孝史. 河合. 弘泰. 修 鈴木高二朗 森川. 嘉之. 有川. 太郎. 熊谷兼太郎 辰巳. 大介. 竹信. 寛章. 中川. 康之 野津. 厚 岡本. 岩波. 光保 水谷. 崇亮 小濱. 英司. 山路. 鷲崎. 誠 泉山. 拓也 関. 克己. 廉. 伴野. 雅之 福永. 勇介 作中淳一郎 渡邉. 独立行政法人. 徹 慶善. 正寛. 祐二. 港湾空港技術研究所. Independent Administrative Institution,. Port and Airport Research Institute, Japan. 加島.

(2) 目. 要. 次. 旨 ·······································································································································································. 5. 1. まえがき ·································································································································································. 6. 2. 地震の概要 ····························································································································································. 8. 2.1. 地震の発生 ····················································································································································. 8. 2.2. 地震動の観測記録 ·······································································································································. 9. 2.3. 震源断層の破壊過程の推定 ····················································································································· 22. 3.津波の概要 ···························································································································································· 31 3.1. 地震時の気象・海象及び津波警報 ··········································································································· 31. 3.2. GPS波浪計で観測した津波の波形 ········································································································· 33. 3.3. 伝播計算 ························································································································································ 38. 3.4. 測定津波痕跡高さの概要 ·························································································································· 42. 3.5. 明治三陸津波の再来(各県想定結果)との比較 ·············································································· 44. 4.現地調査の方法 ···················································································································································· 45 4.1. 調査目的 ························································································································································ 45. 4.2. 調査団と行程 ··············································································································································· 45. 4.3. 調査方法 ························································································································································ 45. 5.津波災害 ································································································································································· 47 5.1. 青森県の調査結果 ······································································································································· 47. 5.1.1 5.2. 八戸港及びその周辺 ·························································································································· 47. 岩手県の調査結果 ······································································································································· 51. 5.2.1. 久慈港及びその周辺 ·························································································································· 51. 5.2.2. 宮古港及びその周辺 ·························································································································· 55. 5.2.3. 釜石港及びその周辺 ·························································································································· 60. 5.2.4. 大船渡港及びその周辺 ····················································································································· 67. 5.2.5. 田老(旧田老町)・重茂半島・宇部町 ································································································ 70. 5.3. 宮城県の調査結果 ······································································································································· 75. 5.3.1. 宮城県の被害の概要 ·························································································································· 75. 5.3.2. 気仙沼港及びその周辺 ····················································································································· 75. 5.3.3. 南三陸町 ················································································································································ 79. 5.3.4. 女川港及びその周辺 ·························································································································· 80. 5.3.5. 石巻港及びその周辺 ·························································································································· 84. 5.3.6. 仙台塩釜港(塩釜港区) ····················································································································· 85. 5.3.7. 仙台塩釜港(仙台港区) ····················································································································· 86. 5.3.8. 仙台空港及びその周辺 ····················································································································· 88. -1-.

(3) 5.4. 福島県の調査結果 ······································································································································· 92. 5.4.1. 相馬港及びその周辺 ·························································································································· 92. 5.4.2. 小名浜港及びその周辺 ····················································································································· 96. 5.5. 茨城県の調査結果 ······································································································································· 100. 5.5.1. 茨城県の被害の概要 ·························································································································· 100. 5.5.2. 茨城港(日立港区)及びその周辺 ································································································ 100. 5.5.3. 茨城港(常陸那珂港区)及びその周辺 ······················································································· 102. 5.5.4. 茨城港(大洗港区)及びその周辺 ································································································ 105. 5.5.5. 鹿島港及びその周辺 ·························································································································· 108. 6.地震被害の調査結果 ··········································································································································· 111 6.1. 青森県の調査結果 ······································································································································· 111. 6.1.1 6.2. 八戸港 ······················································································································································ 111. 岩手県の調査結果 ······································································································································· 116. 6.2.1. 久慈港 ···················································································································································· 116. 6.2.2. 釜石港 ···················································································································································· 122. 6.2.3. 大船渡港 ················································································································································ 128. 6.3. 宮城県の調査結果 ······································································································································· 134. 6.3.1. 石巻港 ···················································································································································· 134. 6.3.2. 仙台塩釜港(仙台港区) ················································································································· 135. 6.3.3. 仙台空港 ················································································································································ 139. 6.3.4. その他 ···················································································································································· 140. 6.4. 福島県の調査結果 ······································································································································· 142. 6.4.1. 相馬港 ···················································································································································· 142. 6.4.2. 小名浜港 ················································································································································ 144. 6.5. 茨城県の調査結果 ······································································································································· 147. 6.5.1. 茨城港日立港区 ·································································································································· 147. 6.5.2. 茨城港常陸那珂港区 ·························································································································· 149. 6.5.3. 茨城港大洗港区 ·································································································································· 151. 6.5.4. 鹿島港 ···················································································································································· 153. 7.釜石湾口防波堤の効果の検討 ·························································································································· 157 7.1. 防波堤の概要 ··············································································································································· 157. 7.2. 防波堤の被災状況 ······································································································································· 158. 7.3. 津波に対する防波堤の安定性の検討 ···································································································· 160. 7.4. 津波の伝播計算 ··········································································································································· 163. 7.5. 湾口防波堤の効果についての考察 ········································································································ 168. 8.地震・津波被害のまとめ ····································································································································· 169 8.1. 津波被害 ························································································································································ 169. -2-.

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