造成高速公路路基沉降变形的原因很多，除施工管理原因外，现行路基压实检测方法和标准不当也是重要原因之一。 　　我国现行路基压实，采用了干密度比的压实检测方法。即以实测压实土的干γ密度和标准击实试验（重锤或轻锤）得到最大干密度γ 0之比，作为路基压实度 K的检测标 There are many reasons for the subsidence and deformation of expressway embankment. Except construction management reasons, the existing subgrade compaction testing methods and standards are also one of the important reasons. In our country, the existing subgrade is compacted and compaction detection method using dry density ratio is adopted. That is, the ratio of the maximum dry density γ 0 to the dry γ density of the measured compacted soil and the standard compaction test (heavy hammer or light hammer) is taken as the test standard of subgrade compaction K