临界动剪应力比法求解强夯加固软土地基有效加固深度的探讨

运用土体破坏时临界动剪应力比方法求解强夯加固软土地基的有效加固深度。结合某工程实例。利用动三轴试验仪测定土体在一定的动应力作用下产生破坏时的临界动剪应力比，同时计算锤底动应力在土中分布的规律。结果表明：在一定夯击能的作用下强夯有效加固深度8．6m，计算结果与实测结果较接近。

Discussion on computing effective reinforcement depth of soft soil foundation by dynamic compaction based on critical cyclic shear stress ratio

The effective reinforcement depth of soft soil foundation was obtained by using critical cyclic shear stress ratio when soil mass was destroyed. Combining some engineering examples, the authors used cyclic triaxial test instrument to determine the critical cyclic shearing stress ratio under the action of definite dynamic stress when soil mass was destroyed, and calculate the distributing rule of hammer bottom cyclic stress in the soil. The results show that the effective compaction is 8.6 m in depth under the action of definite tamper energy. It is relatively closer to the value in practiced measures.