摘要
中高水头船闸改造扩建工程中坝下消能区水流流态复杂,对枢纽发电泄洪时土石围堰附近水流脉动压力、冲击压力等与围堰安全稳定性密切相关的参数有较大影响。重点分析围堰布置形式及其附近水流流态对其抗滑、抗倾覆性能的影响,提出脉动压力及力偶水力计算方法。通过该方法在富春江船闸扩建改造工程围堰安全稳定性研究中的应用,分析沉箱组合过水围堰的脉动压力、冲击压力的变化特性,明确围堰抗滑、抗倾覆性能。
The flow regime in energy dissipation zone is very complex in expansion and renovation projects of the high-head locks, which is related to the pulsating pressure, impact pressure, etc. It is emphasized that the influences of flow regime near the cofferdams with its layout pattern on its coefficients of sliding and pour resistance. Hydraulic calculation method of the pulsating pressure and the couple are presented, and it is used for estimating the security and stability of the earth-rock cofferdam in the Fuehunjiang lock expansion and renovation project, the pulsating pressure and impact pressure on the caisson overtop cofferdam are analyzed, and the coefficients of sliding and pour resistance are provided.
出处
《水运工程》
北大核心
2017年第5期113-117,124,共6页
Port & Waterway Engineering
关键词
船闸
过水围堰
脉动压力
力偶
坝下消能区
lock
overtop cofferdam
pulsating pressure
couple
energy dissipation zone
