求翻译：砂石垫层应在最佳含水率下分层振压密实,每层厚度200mm,压实系数>0.97,处理后砂石垫层的承载力特征值fak=180KPa。是什么意思？

Sand and gravel should be in the best moisture content of cushion under the pressure of dense layered vibration, each the thickness of 200mm, compaction coefficient> 0.97, the bearing capacity of the treated sand cushion eigenvalue fak = 180KPa.

Gravel Mattress should be the best moisture content under pressure ）Is stratified State, each layer thickness, 200 mm compacted coefficient > 0.97 After processing, gravel underlay the endurance value features KPa fak = 180.

The sand and crushed stone breaker strip should the lamination inspire under the best moisture content presses densely, each thickness 200mm, compacting factor >0.97, after processing sand and crushed stone breaker strip supporting capacity characteristic value fak=180KPa.

Gravel cushion should be in the best possible moisture content under vibration compacting, each layer thickness 200mm, >0.97 the compaction coefficient, the treated gravel cushion bearing capacity characteristic value fak=180KPa.

Gravel cushion should be in the best possible moisture content under vibration compacting, each layer thickness 200mm, >0.97 the compaction coefficient, the treated gravel cushion bearing capacity characteristic value fak=180KPa.