固化剂改良黄土的水稳定特性

WATER STABILITY PROPERTIES OF LOESS IMPROVED BY SOLIDIFIED AGENTS

选用新型高分子材料SH固化改良黄土,研究了改良黄土的室内静水崩解、浸水强度及干湿循环模拟试验下的水稳定特性。结果表明:素黄土在静水中湿化严重,而SH改良黄土在静水中则结构形态完好,无崩解现象;改良黄土浸水后强度降低较大,但烘干后强度仍较高,固化体水稳系数大于0.8,且其水稳性效果优于水泥黄土;干湿循环15次后改良黄土仍然能保持较高的强度值,质量损失也较小,试件整体性良好。SH为水溶性液体改良材料,其使用方便,用较少量就可以有效提高黄土的强度,增强黄土的水稳定特性,且效果明显。研究结果可为黄土地区渠道、土坝护坡、边坡等工程的加固改良提供依据和指导。

This paper selects SH-the new solidified polymer material to reinforce the loess,through hydrostatic disintegration test,wet strength test and dry-wet cycle simulation experiment to study the stability of loess water.The results of this experiment showed that：the hydrostatic disintegration test proves that the improved loess soil keeps structure intact,without disintegration phenomenon.In water it has a large strength reduction,but still high strength after being dried.Curing loess＇ water stability coefficient is greater than 0.8,and its water stability is superior to that of cement.Dry-wet cycle test shows that after 15 cycles of wet curing loess can still maintain a high strength value,and mass loss is smaller,specimen integrity is in good conditions.SH is a new polymer-stabilized agent of water-solubility.It is easy to use,and it can effectively improve the strength and enhance the water stability of loess with only a little.The effect is obvious.The conclusions of this research are to provide basis and guidance for strengthening and improving channels,earth dam slope,side slope and other projects in loess areas.