中文摘要：

采用改装的击实仪对赣南地区红砂岩土进行室内击实试验,通过预埋带有编号的钢珠测试土体的空间位移,采用自制环刀取土测试不同位置土体的物理力学性质变化。试验研究表明,在冲击荷载作用下,红砂岩的粘聚力增长幅度远大于内摩擦角的增长幅度;对红砂岩土的空间击实效果,坑底土体好于坑周土体,轻锤高落好于重锤低落;研究成果对强夯地基处理等冲击荷载下土体的作用效应有比较重要的理论和实际意义。

英文摘要：

The compaction test equipment, which is refitted, was used to do laboratory compaction experiment on red sandstone soil of southern Jiangxi, by means of embedding small steel balls which are numbered beforehand the soil＇s space displacement was measure, by using homemade cutting ring to collect soil the physical and mechanical properties changes of red sandstone soil were tested at different positions. Test research shows that the growth range of cohesive force is much more faster than internal friction angle under impact loading; according to the space compaction effect of red sandstone soil, the soil under tamper hole is better than the soil around tamper hole, light hammer and high fall is better than heavy hammer and low fall The research results have important theoretical and practical significance on the effect of soil under the impact loading such as dynamic compaction foundation treatment.