心墙坝不同结构特征稳定性变化分析

Study on stability change of different structural features of core dam

以新疆某心墙坝为例,使用数值模拟方法分析了心墙构造及库水位变动对坝体安全系数的影响。结果表明:减小心墙渗透系数,提高心墙高度有利于改善坝体的防渗能力;在库水位上升、下降过程中,库水的软化作用造成坝体安全系数降低,则库水压力可提升坝体安全系数。

Taking a core dam in Xinjiang as anexample,numerical simulation method was used to analyze the influence of corewall structure and reservoir water level variation on the safety factor of thedam.The results show that reducing the permeability coefficient of the corewall and increasing the height of the core wall are beneficial to improve theanti-seepage ability of the dam and improve the safety of the dam;during theprocess of rising and falling of the reservoir water level,the softeningeffect of the reservoir water reduces the safety factor of the dam.Thereservoir water pressure can increase.