Estimating Dynamic Characteristics of Rockfill Dam Based on Microtremor Measurement

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  • KURITA Tetsushi
    東電設計株式会社 土木本部技術開発部
  • MATSUMOTO Yosuke
    東電設計株式会社 再生可能エネルギー本部
  • TSUNEKAWA Akinobu
    東京電力ホールディングス株式会社 土木・建築エンジニアリングセンター
  • KUROSE Takahide
    東京電力ホールディングス株式会社 土木・建築エンジニアリングセンター

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Other Title
  • 常時微動計測に基づくロックフィルダムの振動特性推定
  • ジョウジ ビドウ ケイソク ニ モトズク ロックフィルダム ノ シンドウ トクセイ スイテイ

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Description

<p>In order to estimate the vibration characteristics of rockfill dams flexibly, a method using microtremor measurement was investigated. In the mountainous area where the dams are located, the amplitude level of microtremors is always very small, so there is a concern that the dam body may not be sufficiently excited. Therefore, we performed measurements using several types of sensors and confirmed the validity of the measurement data. In addition, the microtremor measurements and seismic observation records were compared with respect to the amplification characteristics of the embankment, and the relationship between the two was examined. Finally, microtremors were measured at multiple points in the horizontal direction at the crest to obtain the vibration mode of the fill dam.</p>

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