卡马水库大坝滑塌原因分析

在抢险记录、事后现场调查、补充地质勘察、现场检测与监测等基础上,对卡马水库大坝的滑塌原因进行分析。通过对导流洞水击振动荷载的估算以及坝坡稳定分析,认为卡马水库大坝坝坡偏陡、稳定安全系数偏小是导致坝体滑塌的内因;导流洞水击振动荷载作用是造成坝体滑塌的外因。建议在大坝加固措施实施前,应保证水库安全泄洪,维持水库低水位运行,确保大坝安全;在加固措施实施时做好施工组织计划及应急预案。

Causes for dam slump of Kama Reservoir

Based on the emergency records,field investigations,additional geological surveys,field inspections and monitoring and design and construction information,the causes for the dam slump of Kama Reservoir were analyzed.By estimating the vibration loads of water hammer of the diversion tunnel and analyzing the dam slope stability of Kama Reservoir,the steep slope of Kama Reservoir dam and its insufficient stability safety were regarded to be the internal causes for the dam slump,and the vibration load of water hammer of the diversion tunnel was the external causes.It was suggested that the safety of flood discharge of Kama Reservoir should be guaranteed and the low operating water level should be maintained so as to too ensure dam safety before implementing rehabilitation programs.