When the ratio of compressive modulus of superstratum and substratum is less than 3,academic diffused angles of natural subgrade with soft substratum under pressure in this paper are investigated.

• 对上下层土压缩模量比小于3的软弱下卧层的压力扩散角进行了研究,得出了扩散角理论值,可供相应工程参考。