Research on Mechanical Response of Pavement Structure to Differential Settlement of Subgrade on Highway Widening

Table 1

Subgrade compaction degree.

Fill dig type		Depth below pavement surface (cm)	Compactness (%)
Fill with the subgrade	Road bed	0∼30	≥97
	Lower bed	30∼120	≥97
	Upper embankment	120∼190	≥95
	Lower embankment	Below 190	≥94