数值模拟法确定饱和土强夯施工参数

探讨了用数值模拟确定饱和地基土强夯的施工参数方法:根据孔隙水压力增量随夯击次数的变化情况确定强夯的最佳夯击次数;根据孔隙水压力消散情况确定强夯的间歇时间;根据土体沿深度方向的竖向变形确定土体有效加固深度;根据沿水平方向的竖向变形确定强夯的单点加固范围。研究结果为强夯设计和加固效果评价提供有力的依据。

Study on Confirmation of the Construction Parameter of Saturated Soil Reinforced by Dynamic Compaction

Construction parameter of saturated soil reinforced by dynamic compaction through numerical simulation was discussed;the optimal rammer times were determined according to the varying curve of the increase of pore water pressure along with the rammer times;interval time of dynamic compaction was confirmed based on dissipation of water pressure of the pore;effective consoliation depth soil was ascertained according to vertical deformation of the soil;consolidation range of dynamic compation was determined according to vertical deformation of the soil along with horizontal direction,which could provide basis for dynamic compaction design and reinforcement effect evaluation.