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枕头坝电站导流明渠围堰管涌应急抢险方案研究

付于堂 郭敏敏   

  • 出版日期:2016-06-14 发布日期:2016-06-14

Study of emergency rescue scheme on piping scouring at diversion channel cofferdam of Zhentouba Hydropower Station

  • Online:2016-06-14 Published:2016-06-14

摘要: 针对枕头坝一级水电站导流明渠土石子围堰出现的管涌现象进行了应急抢险施工。抢险施工实践表明,由于上游岩埂、塑性混凝土防渗墙和黏土心墙三者结合部位是关键的软弱点,因而容易形成管涌渗漏通道,甚至造成土石子围堰堰体破坏。在对土石子围堰出现管涌破坏的原因和条件进行分析和研究的基础上,提出了实施抢险加固处理的应急方案和措施。对枕头坝一级水电站导流明渠土石子围堰出现管涌破坏的背景、应急抢险措施及其实施过程和取得的效果等方面的情况进行了介绍。

关键词: 土石子围堰, 管涌, 应急抢险, 枕头坝一级水电站

Abstract:

The emergency rescue work for the piping scouring occurred at earth-rock sub-cofferdam of diversion channel of Zhentouba Hydropower Station I was carried out. The practice showed that the piping passage was easily formed at the joint area of upstream rocky ridge, plastic concrete cofferdam and clay core, which might even cause the failure of the earth-rock sub-cofferdam. The emergency schemes and measures regarding rescue and reinforcement were given on the basis of the analysis of the causes and conditions of piping scoring. The background of the piping scoring and emergency rescue measures, the implementation process and the achievement obtained are introduced.

Key words: earth-rock sub-cofferdam, piping scoring, emergency rescue, Zhentouba Hydropower Station I