Deep Dynamic Compaction & Densification Composite Foundation Technology
Ultra‑deep compaction · High bearing capacity · Low cost · Green & sustainable · Settlement resistance
One‑stop foundation solution
▸ Three major geotechnical challenges:
●Collapsible loess subsidence
●Uneven settlement of Gobi and thick miscellaneous fill
●Deformation of heavy‑load sites in energy & chemical industry
What is Deep Dynamic Compaction & Densification?
Definition · A ground improvement technique that uses impact drilling machines to bore holes, fills them in layers with granular material, and compacts each layer with a high‑energy heavy hammer, achieving deep densification and reinforcement of the foundation.
Construction process
① Drill to design depth
② Place fill in layers
③ In‑hole dynamic compaction with 5–20t special hammer
④ Form large‑diameter bead‑shaped dense columns
⑤ Column‑soil synergy · highly stable composite foundation
Eliminate loess collapsibility and consolidate backfill
Whole‑site treatment: uniform strength, minimal differential settlement
Meet ultra‑high loads in energy/chemical sector – long‑term no settlement or displacement
Applicable ground conditions
Severe settlement upon wetting causes cracking of buildings, tilting of tanks, pipeline rupture; this method permanently eliminates collapsibility.
2. Gobi and thick miscellaneous fill
Industrial parks with recent thick, heterogeneous backfill; maximum treatment depth 60 m.
3. Energy & chemical industrial sites
Heavy tank and equipment loads, liquefiable sands; high bearing capacity, very low post‑construction settlement.
Core technical parameters
| Parameter | Value |
|---|
| Treatment depth | 5–45 m (max 60 m) |
| Column diameter | 1.0–2.2 m |
| Column spacing | 1.6–3.5 m |
| Composite bearing capacity | 180–600 kPa |
| Fill compaction coefficient | ≥0.97 |
| Loess collapsibility | Completely eliminated |
| Residual settlement after construction | ≤15 mm |
Six core advantages
① Permanently eliminate loess collapsibility
② One‑pass treatment of Gobi and fill soils
③ Ultra‑high bearing capacity for heavy energy/chemical equipment
④ Use local materials, significantly reduce cost
⑤ High efficiency, low vibration, site‑friendly
⑥ Green, low‑carbon, environmentally friendly technology
✓ Consumes construction waste · turns waste into foundation | Minimal cement and steel · low carbon footprint
✓ Dust, noise, vibration controlled | Suitable for Gobi ecology and energy/chemical parks
