The first set of tests was that mean stress p was constant while deviator stress q changed; the second set of tests was that q was constant while p changed.

• 做了2种应力路径下的三轴排水剪切试验:平均应力等于常数、偏应力变化的剪切试验以及偏应力等于常数、平均应力变化的剪切试验。