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[VI-101] Removal of spillway gate from redevelopment dam

〇ryoma hashimoto¹, naoyuki hukui¹, moto nakamura¹, takahiro watanabe¹ (1.kajima corporation)

Keywords:Redevelopment dam, Spillway gate, 750t crawler crane, Process securing, waterproof

In the redevelopment of the dam, the water level fluctuates according to the operation of the existing dam even during the construction period, and the construction must be performed in accordance with the water level fluctuation. The removal of the spillway gate of the existing dam started after August 20, when the water level reached the lowest level, and the concrete casting had to be completed to the existing top before the water level rose again. In this paper, we report the removal results of the spillway gate constructed under these constraints and the method of installing the water stoppage plate which had to be changed.