foundation
2019-05-07 15:09:01
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Foundation constrution is generally according to local highway requirements:
EVENNESS: No depressions over 6mm in 4m or 3mm/1m; No step-like irregularities greater than 1mm.
SLOPE: Transverse slope≤1%, longitudinal slope≤1‰
DENSITY： Compacted density＞95%, porosity＜6%
