�@ Œf�ÚŽGŽ��i˜a�j�F - Vol�F 32-1Šª ”N�F 1989”N •Å�F 103-112•Å ’˜ŽÒ�i˜a�j�F - ƒ^ƒCƒgƒ‹�i˜a�j�F - �´˜^�i˜a�j�F
- ƒL�[ƒ��[ƒh�i˜a�j�F - Œf�ÚŽGŽ��i‰p�j�F COASTAL ENGINEERING IN JAPAN ’˜ŽÒ�i‰p�j�F Takujiro MIYAMOTO, Shigeru YOSHINAGA, Fujio SOGA, Kenkichi SHIMIZU, Ryoichi KAWAMATA, Mineo SATO ƒ^ƒCƒgƒ‹�i‰p�j�F SEISMIC PROSPECTING METHOD APPLIED TO THE DETECTION OF OFFSHORE BREAKWATER UNITS SETTILING IN THE SEABED �´˜^�i‰p�j�F
In solving a problem of offshore breakwater subsidence, it is important to investigate the shape of an existing breakwater whose crown has been repeatedly raised in the past. In this context, a series of observations were performed at the west coast of Niigata from 1984 to 1985, where seismic prospecting provided a reasonable estimate of breakwater cross sections under the water level as well as under the sea bottom. ƒL�[ƒ��[ƒh�i‰p�j�F - ‹LŽ–‹æ•ª�F - ‹æ•ª �@�@�@ˆÏˆõ‰ï˜_•¶�W