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文章结合常吉高速公路强夯补强加固路基工程,做了大型的现场试验,在试验路段布置了43个土压力盒,运用动态应变仪记录了强夯动应力的传播和衰减过程。试验结果表明:强夯对红砂岩填土路基的加固效果明显,强夯动应力也相当明显,强夯动应力在水平方向的衰减速度比竖直方向快,竖直方向的影响范围比水平方向大;强夯法加固地基的影响深度远大于有效深度;随着夯击次数的增加,有效加固范围内的动应力增加明显,但在第5击后基本稳定。
Combined with the compaction and reinforcement of subgrade with the compaction of Changji Expressway, a large-scale on-site test was done. 43 earth pressure boxes were arranged in the test section. The dynamic strain gauge was used to record the propagation and attenuation of dynamic compaction. The test results show that the effect of dynamic compaction on the filling of red sandstone roadbed is obvious, and the dynamic stress of dynamic compaction is also quite obvious. The dynamic stress of dynamic compaction has a faster decay speed in the horizontal direction than the vertical direction, and the influence range of the vertical direction is more than that in the horizontal direction The influence depth of the ground consolidation by dynamic compaction is far greater than the effective depth. With the increase of the number of tamping, the dynamic stress in the effective reinforcement increases obviously, but it is basically stable after the fifth strike.