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発表 Damage to Gravity-Type Quay Wall Associated with Earthquake-induced Liquefaction and Its Seismic Design

作成年度 2003年度
論文名 Damage to Gravity-Type Quay Wall Associated with Earthquake-induced Liquefaction and Its Seismic Design
論文名(和訳)
論文副題
発表会 ISOPE-2003 (The 13th International Offshore and Polar Engineering Conference)
誌名(No./号数)
発表年月日 2003/05/25 ~ 2003/05/30
所属研究室/機関名 著者名(英名)
北海道開発局笹島 隆彦(SASAJIMA Takahiko)
国土交通省鉄道局(前港湾研究室)北原 政宏(KITAHARA Masahiro)
北海道開発局上田 裕章(UEDA Hiroaki)
北日本港湾コンサルタント㈱大塚 夏彦(OTSUKA Natsuhiko)
豊橋技術科学大学三浦 均也(MIURA Kin-ya)
抄録
This paper aims to clarify the characteristics on the stability of gravity type quay wall during earthquake by investigating the damages caused by earthquakes. Close examinations on the damages and stability factor of quay walls were carried out for the recent two big earthquakes in Hokkaido Island. As a result、 the damages were large at the quay walls where liquefaction occurred in the backfill ground. On the other hand、 the quay walls whose backfill ground had not been liquefied、 could have survived the severe shakes which exceeded their stability limit in earthquakes. Here the stability limit had computed by seismic coefficient method in which Mononobe-Okabe’s formula was applied to seismic earth pressure acting on the quay walls. From the results mentioned above、 the interaction between caisson and backfill ground might improve the availability of seismic coefficient method for gravity type quay wall. And it is considered that there is a possibility that the seismic force acting on gravity type quay walls whose backfill ground had been improved against liquefaction could be lessened in the seismic coefficient method.
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