水利学报Issue(5)：505-514,10.DOI:10.13243/j.cnki.slxb.20150249
特高坝及其梯级水库群设计安全标准研究Ⅰ：理论基础和等级标准
Evaluations on the safety design standards for dams with extra height or cascade impacts. Part I:fundamentals and criteria
摘要
Abstract
The rapid development of China’s hydropower projects has resulted in a number of large dams whose heights exceed 200 m, an applicability limit of various design codes. Another concern comes from the cascade hydropower devolvement on a river, in which break of one dam may cause serious downstream secondary disasterds. Based on a comprehensive review on the social and professional safety control stan⁃dards the authors propose in these paper two extra classes as well as their related design criteria to the ex⁃isting Chinese dam classification systems. Class E2 refers to a dam with a height ranged between 200-250 m, or a dam whose breaching would cause a secondary break of a downstream Class 1 dam if early warn⁃ing is not available. The allowableannual probability of failure, reliability index and slope safety factor are specified as 5 × 10-8, 4.45, and 1.6 respectively. Class E2 refers to a dam with a height ranged between 250-300 m, or a dam whose breaching would cause a secondary break of a downstream Class 1 dam even with early warning. The allowable annual probability of failure, reliability index and slope safety factor are specified as 10-8, 4.7, and 1.7 respectively. An in-depth study on risks and standards associated with these dams has been provided to assess the applicability of the proposed criteria which can be useful for the work of code revision.关键词
特高坝/梯级水库/安全标准/高坝分级/梯级连溃Key words
extra height dam/cascade resevior/safety criteria/high dam classification/cascade dam break分类
建筑与水利引用本文复制引用
周建平,王浩,陈祖煜,周兴波,李斌..特高坝及其梯级水库群设计安全标准研究Ⅰ：理论基础和等级标准[J].水利学报,2015,(5):505-514,10.基金项目
国家重点基础研究发展计划 （）
