Abstract: During the expansion of Chitan hydropower station, the blasting may affect the adjacent dam, powerhouse and switching station. In this paper, the important structures' dynamic response to blasting vibration is determined by three-dimensional dynamic finite element calculation. The results show that the safety of existing dam can be ensured by control of blasting parameters and by other protection measures in the process.

Key words: dam safety, blast vibration, influence analysis

摘要： 池潭水电站扩建工程施工期爆破可能会影响紧邻的池潭水电站大坝、发电厂房及开关站的安全运行。通过三维动力有限元计算确定池潭水电站重要建筑物的爆破振动动力响应。计算结果表明，施工期工程爆破会对已有大坝的运行产生一定影响，但可以通过控制爆破参数和安全防护等措施保证主要保护建筑物的安全。

关键词: 大坝安全, 爆破振动, 影响分析