A clay core earth and rockfill cofferdam with a high pressure gunite impervious wall in the overburden has been built through comparison between different types of cofferdams in the desigm , and...

• 下游土石过水围堰采用混凝土楔型体结合钢筋笼块石护面等新技术，解决了土石围堰防渗和渡汛保护问题。