For the unsaturated soil, this method provides a very accurate estimate of earth pressure from the direct shear experimental indexes, which overcomes the shortage of the extended Rankine theory.

• 对于非饱和土，采用简单易得的直剪试验指标应用广义朗肯土压力公式就可以得到相当精确的结果，弥补了扩展朗肯土压力理论的不足。