希德拉顿颗粒铺盖防渗性能试验

Experimental study of the anti-seepage characteristics of the Sidraton particles blanket

为了探讨不同铺盖条件下希德拉顿颗粒的防渗效果,堆建了3座内含不同渗漏隐患的土石坝模型。将不同铺盖厚度和不同铺盖面积的希德拉顿颗粒铺盖在坝面渗漏处,并统计渗漏流量随时间的变化。试验结果表明:铺盖希德拉顿颗粒后,3种渗漏模型的渗漏流量都随时间呈指数规律下降,接触带渗漏模型的渗漏流量下降速率最大,库底渗漏模型的渗漏流量下降较缓;铺盖厚度增大,3种渗漏模型的防渗效果增强;对于接触带渗漏模型和集中渗漏模型,铺盖面积增大其防渗效果反而减弱;认为水合希德拉顿颗粒具有良好的防渗能力,可用于预防和修复堤坝的渗漏。

In order to investigate the anti-seepage characteristics of Sidraton particles under different cover conditions,three earth rock-fill dam models with different hidden trouble of leakage were constructed.Sidradon particles with different blanket thickness and different blanket area were covered in the seepage area of dam surface and the change of seepage flow with time was recorded.The experiment shows that after covering the Sidraton particles,the seepage flow of the three leakage models decreases exponentially with time.The seepage flow of the contact leakage model decreases the most,and the seepage flow of the reservoir bottom leakage model decreases slowly.With the increase of blanket thickness,the anti-seepage effect of the three leakage models is enhanced.For the contact leakage model and the concentrated leakage model,the anti-seepage effect decreases with the increase of the blanket area.Hydrated Sidraton particles with a good anti-seepage ability can be used to prevent and repair the leakage of dam.