水电站厂房抗浮稳定安全控制标准研究  

Research on safety control standards for anti-floating stability of hydropower house

作　　者：张勇[1] 肖平西[1] 安旭文[2] 侯建国[2] 

机构地区：[1]中国水电顾问集团成都勘测设计研究院,四川成都610072 [2]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《人民长江》2011年第23期87-90,共4页Yangtze River

摘　　要：为建立新的水电站厂房整体抗浮稳定安全控制标准,采用一次二阶矩法对水电站厂房抗浮稳定进行了可靠度校准分析。计算结果表明,按现行《水电站厂房设计规范》设计的厂房抗浮稳定可靠指标的总体平均值远低于GB 50199-1994推荐的目标可靠指标的要求。提出在《水电站厂房设计规范》修订时宜适当提高抗浮稳定的安全度设置水平,并给出了抗浮稳定安全系数取值建议。对已建工程设计成果的调查表明,水电站厂房的抗浮稳定基本由非常运行或机组未安装工况控制,极少数工程可能需要略微增加工程投资以满足建议的抗浮稳定安全系数要求。To establish a new safety control standards for anti - floating stability of hydropower house, a calibration analysis on reliability for anti - floating stability of hydropower house is conducted using the first - order second - moment method. The cali- bration shows that the mean reliability index value of anti - floating stability for hydropower house designed according to current design code is far below the recommended values in the GB 50199 - 1994. We suggest that the safety level of anti -floating sta- bility shall be slightly raised when revising the current design code, and the values for safety factor are proposed. Design calcula- tions show that the anti - floating stability of a hydropower house is basically controlled by the cases of abnormal operation or pow- erhouse without unit installation. Only a few projects may need a little additional investment to satisfy the proposed safety factor of anti - floating stability.

关 键 词：水电站厂房 抗浮稳定 可靠度 安全系数 一次二阶矩法 

分 类 号：TV731[水利工程—水利水电工程]