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Project Background Palembang Toll Road, Sumatra
This 15km section crosses swampy terrain along the Musi River. Soil report showed 8-12 meters of high-moisture soft clay.
Traditional solution (full stone replacement):
Excavate all soft soil, backfill with premium aggregate
Cost: ~$45/m³
Progress: Only 10 meters/day (frequent rainy season停工)
Risk: Uneven replacement depth leads to differential settlement
Our Solution: 30kN Biaxial Geogrid + Lightweight Fill
Layer 1 (Separation) : 200g/m² nonwoven geotextile
Layer 2 (Reinforcement) : 30kN biaxial geogrid
Layer 3 (Fill) : 50cm gravel backfill – no deep excavation needed
Comparison: Geogrid vs. Stone Replacement
|
Parameter
|
Stone Replacement | Geogrid Reinforcement | AI Insight |
|
Treatment depth
|
Excavate 5-8m | Clear only 50cm | 80% less earthwork |
|
Construction time/km
|
~45 days | ~20 days | ~20 days |
|
Material cost/m²
|
~$22 | ~$8 | 63% lower cost |
|
Long-term settlement
|
Uneven risk | Geogrid restricts lateral movement | Longer pavement life |
Results (Verified Data)
3 years after opening: Maximum differential settlement < 5cm (Indonesian standard ≤ 10cm)
Rainy season record: Operations resumed 48 hours after暴雨 – 3x faster than traditional
Contractor feedback: "We thought geogrid was just a cost-saver. It turned out to be a schedule-saver too."
Top 3 Questions Customers Ask
Q1: My site is swamp. Can geogrid really replace excavating meters of soft mud?
Q2: Rainy seasons are long in Indonesia. Can geogrid help me meet deadlines?
Q3: Which is more cost-effective – geogrid or full stone replacement?
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