- With the top layer of sand covering the bottom nail 30cm (request K≥98% tightness and E≥900kg / cm2), after leveling the right to the thickness required. Using bulldozers and graders for leveling and compaction interested preliminary geometry to ensure high embankment not affect the top layers of material.
- Using radio and tire vibration, compaction for until reaching tightness K≥98% and E≥900kg / cm2. During the construction process always pay attention to the humidity of materials to achieve optimum moisture when compacted. If too wet, the material must be dried before being compacted into and if too dry, use objects Lei water tank trucks watering.
- The surface of each layer up to uniform, flat and horizontal slope appropriate to make security is always drained.
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