摘要
本文基于Van Genuchten非饱和渗流模型综合分析了土石坝饱和—非饱和渗流,以工程实际为例,研究了水位骤降工况下土石坝渗流稳定问题.结果表明:库水位骤降工况下,上游水位的变化对坝体渗流量的影响较大;库水位急剧降落易使浸润线形成逆向渗流形态,并造成土石坝坝坡稳定性的降低,但是当孔隙水压力消散时间足够长时,上游坝坡稳定性有一定程度的提高.
Van Genuchten unsaturated seepage model is adopted for comprehensive saturated and unsaturated seepage analysis in this paper, and then an embankment dam is taken as an example to investigate the seepage and slope stability problems of embankment dams under rapid drawdown of water level. The results show that the fluctuation of the upstream water level has a great influence on the seepage flow of the dam under rapid drawdown of water level. The reverse seepage formed during the rapid drawdown of water level significantly reduce the slope stability of the embankment dams. However, the factor of safety for the upstream slope increase to an extent when the dam pore water pressure is sufficiently dissipated.
作者
罗春
罗园
王锋
LUO Chun LUO Yuan WANG Feng(Chongyi County Water Resources Bureau of Jiangxi Province, Chongyi 341300, China Chongyi County Soil and Water Conservation Bureau of Jiangxi Province, Chongyi 341300 ,China Jiangxi Water Resources Institute, Nachang 330013, china)
出处
《江西水利科技》
2016年第3期202-207,共6页
Jiangxi Hydraulic Science & Technology
关键词
土石坝
库水位骤降
非稳定渗流
坝坡稳定
Embankment dam
Rapid drawdown of reservoir water level
Transient seepage
Slope stability
