SH固化黄土的土—水特征曲线试验

Tests on Soil-Water Characteristic Curves of SH Solidificated Loess

为提高黄土的强度和稳定性,采用新型高分子材料SH固化黄土,就固化黄土的击实、液塑限特性和土—水特征曲线进行试验研究。结果表明,固化黄土的最优含水率随SH掺量的增加而增大,而最大干密度则呈减小趋势;SH掺入后,黄土的液塑限、塑限指数均明显增大,但液限、塑性指数随SH掺量的增加先增后减;固化黄土的土—水特征曲线随着干密度的增大由陡变缓,干密度不变时,相同基质吸力下,SH掺量大的试样体积含水率大,固化黄土持水特性强,水稳定性高。

In order to improve the strength and stability of loess,compaction characteristics,liquid plastic limit and soil-water characteristic curve（SWCC）of loess solidified by SH were studied.The results show that with increasing of the content of SH,optimal moisture content of loess solidification increased gradually while the maximum dry density decreased.The liquid limit and plastic limit of loess solidification increased obviously,but with the increasing of SH,liquid limit and plasticity index increased first and then decreased.With the increase of dry density,the SWCC of loess solidification changed slowly to flat curve.Under the condition of the same dry density and matric,the more content of SH is,the stronger the water-holding capacity of solidified loess is.The property of water stability is also improved.