Building a Wall on Sand: Engineering Considerations for Kuwait Project

An engineer seeks guidance for a 340-meter, 2.7-meter high wall on sandy soil in Kuwait. The project requires proper foundation design for this challenging substrate.

Critical Geotechnical Challenges

• Poor bearing capacity: Sand lacks cohesion
• Erosion susceptibility: Wind and water remove unprotected sand
• Liquefaction risk: Saturated sand loses strength during seismic events
• Settlement variability: Differential settlement cracks rigid walls

Required Investigations

1. CPT (Cone Penetrometer Testing): Determine depth to competent bearing strata
2. Seismic assessment: Evaluate liquefaction potential
3. Groundwater/tidal study: Assess saturation effects

Foundation Solutions

Deep Foundations

• Steel pipe piles
• Precast concrete piles
• Cast-in-place drilled shafts
• Wall footing tied to pile cap system

Ground Improvement

• Compaction (vibroflotation, dynamic compaction)
• Soil densification/injection
• Partial soil replacement
• Geogrid-reinforced soil mass

Critical Design Questions

• Freestanding or retaining wall? (Changes everything)
• Seismic zone classification?
• Surcharge loads behind wall?
• Construction timeline and access?

Resources

• Kurian's Design of Foundation Systems (raft/spread footing calculations)
• Japanese research on sand footings (fellenius.net)
• Texas A&M spread footing research
• ASCE publications and geotechnical specialist directory

Bottom line: This requires a qualified geotechnical engineer on-site. Sand construction is feasible (see Japan), but site-specific design is non-negotiable for a 340m structure.