高液限粉土的承载比特性及其利用建议

The CBR characteristics and utilization of high liquid limit silts

通过对高液限粉土进行不同浸水条件下的承载比试验,研究高液限粉土浸水、不浸水的强度变化规律,并对浸水条件下水泥改良粉土的强度特征进行探讨。试验结果表明:浸水条件下粉土的CBR值小于3%;不浸水的粉土CBR值与4%水泥改良粉土的浸水CBR值受初始制样含水量控制,但整体比浸水CBR值高。从CBR值随含水量的变化规律可以看出,粉土对水十分敏感。对此,提出粉土用于路基填筑的利用原则和具体的处置措施。

By taking bearing ratio tests of high liquid limit silts under different soaking conditions, variation of the strength with moisture was obtained, and the strength characteristics discussed. The results show that the CBR value of silts is less than 3% under soaking condition. The CBR values of silt without soaking and 4% cement improved silt are affected by the initial water content, with the latter higher than the former. From the pattern of variation of the CBR value we can see that CBR value of silt is very sensitive to moisture. Principle and disposal measurement were proposed for usage of silts for subgrade filling