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强夯法施工是在极短的时间内对地基土体施加一个巨大的冲击能量,这种突然释放的巨大能量将使土体发生一系列的物理变化;如土体结构破坏或液化;排水固结压密;触变恢复等。其作用结果使一定范围内地基强度提高、孔隙挤密、消除湿陷性。国道112线兴隆县段改建工程路基施工中,采用强夯施工方法对路基进行加固,取得很好的效果。通过夯击振动或挤压使路基土体密实,土体抗剪强度提高,压缩性减小,达到了提高地基承载力、减小沉降量、改善湿陷性的目的。有效加固深度计算采用Menard修正公式计算:
Dynamic compaction construction is in a very short period of time on the foundation soil to impose a huge impact energy, this sudden release of huge energy will make soil a series of physical changes; such as soil structure destruction or liquefaction; drainage solid Knot dense; thixotropic recovery. Its role as a result of the foundation within a certain range of intensity, pore compaction, to eliminate collapsibility. State Road 112 Xinglong County reconstruction project subgrade construction, using dynamic compaction construction method to reinforce the subgrade, and achieved good results. By compaction of vibrations or compaction, the subgrade soils are compact, the shear strength of soil is increased, and the compressibility is reduced, which achieves the purpose of improving the bearing capacity of foundation, reducing the settlement and improving the collapsibility. Effective reinforcement depth calculation using Menard correction formula: