Table 5
Subgrade compaction standards in France
Structural layer of subgrade
Thickness/cm
K
E
v2
/MPa
Ballast cushion
To be determined according to transportation conditions and sleeper type
≥1.00
Subbase
Generally ≥15 according to actual needs
≥0.95
Surface layer of subgrade
≥0.95
≥50
Structural layer of subgrade
Thickness/cm
K
E
v2
/MPa
Ballast cushion
To be determined according to transportation conditions and sleeper type
≥1.00
Subbase
Generally ≥15 according to actual needs
≥0.95
Surface layer of subgrade
≥0.95
≥50
Source(s):
Authors’ own work
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