According to the results of the compaction test and hearing ration test, it is discovered that the filled soil also has the swelling property after being compressed, which may result in the crack of the subgrade with the change of the water contents.

• 通过对路基填土的击实试验和承载比试验表明，填土压实之后具有一定的膨胀性，在含水量变化差异性影响下的胀缩变形可能导致路基开裂。