摘要
冻土区土石坝在上覆压力下,冻融循环作用对其渗透特性影响较大。依托西南区一心墙堆石坝料场,开展冻融循环下不同上覆荷载的模型渗透试验。研究结果表明:当上覆压力保持不变时,堆石料的渗透性随冻融循环次数的增加而增大,且在冻融循环次数较小时其影响更为显著。当冻融循环次数一定时,堆石料的渗透系数与上覆压力呈幂函数降低的变化趋势。
Under the overburden pressure of the earth—rock dam in the soil area,the freeze-thaw cycle has a greater impact on its permeability characteristics.Relying on the Yixinwall Rockfill Dam yard in the southwest area,model penetration tests of different overburden loads under freeze-thaw cycles were carried out.The research results show that when the overburden pressure remains unchanged,the permeability of the rockfill increases with the increase in the number of freeze-thaw cycles,and the effect is more significant when the number of freeze-thaw cycles is small.When the number of freeze-thaw cycles is constant,the permeability coefficient of the rockfill and the overlying pressure show a power function decreasing trend.
作者
李永强
Li Yongqiang(Shaanxi Jinghui Canal Irrigation Administation,Sanyuan 713800,Shaanxi)
出处
《陕西水利》
2021年第9期15-17,共3页
Shaanxi Water Resources
关键词
堆石料
冻融循环作用
渗透系数
试验研究
Rockfill
freeze—thaw cycle effect
permeability coefficient
experimental study
