不同反滤料对分散性黏土防渗体裂缝自愈的影响

Influence of Different Filter Materials on Crack Self-Healing of Dispersive Clay Impervious Body

分散性土具有渗透性差的优势,可以用于水利工程防渗心墙的施工,但其在反滤层保护下的防渗性能和裂缝自愈性能是工程设计和施工中必须考虑的问题。利用室内试验方式,探讨不同反滤料对分散性黏土防渗体裂缝自愈性的影响。根据试验结果,建议在使用分散性土作为防渗体材料时,应在其后部设置反滤保护层,且反滤料越致密,保护效果越好,越有利于裂缝的自愈合。

The dispersive soil has the advantage of poor permeability and can be used in the construction of anti-seepage core wall of water conservancy projects.However,its anti-seepage performance and crack self-healing performance under the protection of inverted filter layer must be considered in the engineering design and construction.In this study,the influence of different filter materials on the crack self-healing of dispersive clay impervious body was discussed by means of laboratory tests.According to the test results,it is suggested that when the dispersive soil is used as the impervious material,the filter protection layer should be set at the rear of it,and the denser the filter material,the better the protection effect,and the more conducive to the self-healing of cracks.