Page 4 - Dynamic Compaction Brochure

COMPARISON

Impact Compaction Dynamic Compaction Vibratory Compaction

FEATURES
FEATURES

Energy Rating Various Can be 30t dropped over 10 -25kJ
anything between 7.5 - 30m Coverage 100% <100% 100%
Impact Description High Frequency, Low Low Frequency, High Low Frequency, High
Amplitude Amplitude Amplitude

Contact Period Short Period, Small Short Period, Large Contact Longer Period, Large
Contact Area Area Contact Area 4m
Depth of Influence 0 to 400mm 5-8m (up to 12m recorded) 1 - 2.5m(up to 5m
recorded)
Compaction to Compacts to surface Disturbs top 1-1.5m Disturbs top 100mm;
Top easily repaired
3m
Productivity Slow, governed by max Slow, governed by time to Faster (Ave 12kph,
speed (3-5kph) lift and fall 15kph max)
Volumes 1500-2500m 3 /shift ? 5000- 7500m 3 /shift
Layer Thicknesses Range from 200 - Traditionally in-situ Range between 500-
300mm improvement 1000mm Cost Fair Expensive Cost Effective

COMMON APPLICATIONS OF DYNAMIC COMPACTION

Ÿ Deep In-Situ Compaction Ÿ Pavement Rehabilitation
Ÿ Thick Lift Compaction Ÿ Permeability Reduction
Ÿ Treatment of Collapsible Soils Ÿ Brownelds Rehabilitation
Ÿ Treatment of Dry Soils Ÿ Treatment of Marine Sands
Ÿ Compaction of Rock Ÿ Coal Compaction
Ÿ Proof Rolling Ÿ Unsurfaced Roads
Ÿ Accelerated Consolidation

COST SAVINGS

Ÿ Use of Dynamic Compaction will decrease cut and ll production costs by an average of 50%
Ÿ Use of Dynamic Compaction will decrease the plant cost per km by between 32% -60%
Ÿ Road design and consultation - Soil Solutions provides a material selection,
road design and construction methodology service – contact us today for more details