When using 20T heavy vibratory roller, what is the backfill thickness per layer?
Compaction to meet the design requirements on the line, generally can not exceed 40cm.
2, subgrade backfill using heavy roller, in order to ensure backfill quality. The construction of subgrade soil subgrade must be layered backfilling, each layer backfilling thickness is less than 30cm, roller with 18-20T times the number of not less than four times, with cutting ring check its density to meet the design requirements must be.3, after the roadbed forming, should be central line, elevation, vertical and horizontal gradient test, qualified immediately after maintenance, after the expiration of the maintenance report submitted to the quality inspection department for acceptance testing.
When using 20T heavy vibratory roller, the backfill thickness of each layer is less than 30cm.Subgrade construction quality control measures:The quality of the subgrade and the base of the road will directly affect the quality of the concrete pavement.1, subgrade construction, first of all, the surface soil excavation, should be replaced by bad soil, and filling before compaction.
The measurement of unbalance can be carried out online or offline. Due to the unique frequency meter technique of the East, the measured unbalance amplitude and phase have high precision. Theoretically, the amplitude accuracy can reach 0.1%, and the phase accuracy is less than 1 degrees. Vectors can be synthesized and decomposed.
