STUDY OF WATERTIGHTNESS AND DRAINAGE HOLE IN DAM BODY OF ROLLER COMPACTED CONCRETE ON NAM NGIEP 1 HYDROPOWER PROJECT IN LAOS

摘要：

　　In order to secure the watertightness of the dam body,a variety of methods and processes have been applied to Roller Compacted Concrete (RCC) dams in the world.Treatment of placed concrete and construction joints,water proofing of concrete at the upstream portion,as well as well-designed concrete mixes are important factors for the above purpose.In addition,drainage holes are usually arranged in the dam body to drain the leakage water properly for reducing the uplift pressure acting on concrete placing joints.This paper presents a practice for enhancing the watertightness of the 167 m high RCC main dam body of Nam Ngiep 1 Hydropower Project in the Lao PDR.Its effectiveness is discussed through two-dimensional finite element permeability analysis and is validated through in-situ permeability test and observation of concrete placing joint by X-ray CT scanning.

关键词： watertightness finite element permeability analysis in-situ permeability test CT scanning

作者: Yushi Aosaka Takahisa Tabuchi Shintaro Nohara Shoji Tsutsui

作者单位: Techinical Division, Nam Ngiep 1 Power Company, Bolikhamsay, Lao PDR Hydro Power Division, Kansai Electric Power Co., Inc., Osaka, Japan Central Research Institute of Electric Power Industry, Institute, Chiba, Japan

会议类型: 国际会议

会议名称: the 8th International Symposium on Roller Compacted Concrete (RCC) Dams(第八届国际碾压混凝土大坝国际研讨会)

会议地点: 昆明

会议语种:英文

页码: 83-92

在线出版日期: 2019-11-11（万方平台首次上网日期，不代表论文的发表时间）