论文部分内容阅读
利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竖向和水平位移。试验研究表明:在冲击荷载作用下,夯坑的累计夯沉量随夯击数增加的变化规律可分为增速较快和增速较慢两个阶段;坑底土体以竖向位移为主,坑周土体以水平位移为主;随着单击夯击能的增加(15N.m、20N.m、25N.m、30N.m),使土体产生显著位移的作用范围,在水平方向从3.0～3.5cm变化至6.0～6.5cm,在竖直方向从9.0～10.0cm变化至18.0～19.0cm;随着系统平衡状态程度的不断提高,夯击能用于提高系统平衡状态程度的能量减少,能量利用率降低,系统趋于某个与夯击能对应的相对稳定的平衡状态,不同的夯击能对应着不同的稳定平衡状态。
The red compacted sandstone soil in Gannan area was subjected to indoor compaction test by modified compactor, and the vertical and horizontal displacements of soil were tested by embedding the numbered steel balls. The experimental results show that under the action of impact load, the accumulative total settlement of tampered pit can be divided into two stages: rapid growth and slow growth with the increase of the amount of tamping. The vertical displacement of bottom soil is With the increase of tamping energy (15N.m, 20N.m, 25N.m, 30N.m), the scope of significant displacement of the soil is produced The horizontal direction changes from 3.0 to 3.5 cm to 6.0 to 6.5 cm, and the vertical direction changes from 9.0 to 10.0 cm to 18.0 to 19.0 cm; as the degree of system equilibrium state continues to increase, the impact can be used to increase the degree of system equilibrium The energy is reduced, the energy utilization rate is reduced, and the system tends to be in a relatively stable equilibrium state corresponding to the impact energy. Different impact energy sources can correspond to different stable equilibrium states.