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[VI-88] Construction of dam energy damper side wall using precast block

〇ISAO KAWANAKA¹, OOKI HIROKAZU¹, FUJITA HIROSI², AMANO EISUKE², YOSHIDA HITOSHI³ (1.kajima corporation, 2.ministry of land,infrastructure,transport and tourism shikoku regional development bureau, 3.japan dam engineering center)

Keywords:dam, renovation, energy damper, precast block, shortening the process, discharge evacuation

At Nagayasuguchi Dam, dam renovation work is underway to add two spillway gates.energy damper will be constructed downstream of the dam with the additional gates. The construction work of the energy damper is the operation while operating the existing dam,it will be constructed only for a limited period during the non-flooding season. Therefore, in order to secure the project schedule, the structure of the side wall of the energy damper, a precast block was adopted on the side wall of the energy damper for the purpose of shortening the process. In the text, reports the results of the construction of the side wall of the energy damper construction using the Pca block