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通过室内试验研究了压实黄土的变形、强度特性。从击实黄土的室内三轴压缩试验可以得出,随着压实度K的增大,压实黄土的内聚力c增大很多,而内摩擦角φ的增大幅度相对较小。通过双线法得出不同压实程度(干密度)下的压力与湿陷系数关系图可以看出,击实黄土在击实不充分的情况下仍具有湿陷性。若以200KPa下的湿陷系数为0.015为评判标准,所用土样干密度小于1.62g/cm3对应压实度小于95%时具有湿陷性。
The deformation and strength characteristics of compacted loess were studied through laboratory experiments. Comparing with the indoor triaxial compression tests of compacted loess, it can be concluded that the cohesion c of compacted loess increases a lot with the increase of compaction degree K, while the increase of internal friction angle φ is relatively small. It can be seen from the two-line method that the relationship between pressure and collapsibility coefficient at different degrees of compaction (dry density) shows that collapsible loess is still collapsible when compaction is not sufficient. If the collapsibility coefficient at 200KPa is 0.015, the dry density of the soil sample used is less than 1.62g / cm3, which is collapsible when the compaction degree is less than 95%.