摘要
以沙坪二级水电站工程设计与施工为依托,对堆石混凝土坝的防渗开展了设计与研究工作。堆石混凝土本身防渗性能优异,可直接挡水,但考虑施工因素,为提高堆石混凝土层间抗渗的保证率,一般在上游面设厚度0.5~1.0 m、防渗性能是常态混凝土2~3倍的自密实混凝土防渗层,以确保坝体的抗渗性能。竣工5年来的监测成果验证了本工程堆石混凝土抗渗指标满足设计要求。
Based on the design and construction practice of Shaping II Hydropower Station Project,the design and analysis of the seepage control structure of the rock-filled concrete dam are introduced.The results show that the rock-filled concrete is of excellent performance in seepage prevention and thus can be used for water retaining directly.However,considering the influence of the practical construction process,seepage control structure is still necessary.To guarantee the inter-layer seepage prevention performance of the rock-filled concrete dam,a self-compacting concrete layer with the thickness of 0.5~1.0 m and two to three times of the impervious property is usually constructed on the upstream surface.Monitoring results of five years since the completion of the project verify that the seepage control performance of the rock-filled concrete dam meets the design requirements.
作者
刘明华
涂承义
叶建群
LIU Minghua;TU Chengyi;YE Jianqun(Powerchina Huadong Engineering Co., Ltd., Hangzhou 311122, China)
出处
《水电与新能源》
2020年第5期11-14,共4页
Hydropower and New Energy
关键词
沙坪二级水电站
堆石混凝土坝
坝体防渗
横缝
坝体止水
Shaping II Hydropower Station
rock-filled concrete dam
seepage control
transverse joint
dam waterstop
