When is liquefaction mitigation required? 

Liquefaction mitigation may be required when: 

• Seismic hazard analyses identify liquefaction risk
• Loose, saturated soils are present below the groundwater table
• Critical structures or infrastructure must remain operational after seismic events
• Settlement or lateral movement could damage adjacent structures
• Regulatory or resilience requirements mandate mitigation measures 

Liquefaction mitigation frequently incorporates ground improvement techniques; however, it is distinguished by its focus on seismic performance. While ground improvement addresses static loading conditions, liquefaction mitigation targets soil behavior under earthquake‑induced cyclic loading, often emphasizing densification or drainage to control excess pore-water pressures.

Liquefaction mitigation process and approaches

Liquefaction mitigation solutions are designed to improve soil density, strength, and drainage characteristics to enhance ground performance during seismic loading and protect structures and infrastructure. When seismic forces act on saturated, loose granular layers, the soil structure contracts, generating excess pore water pressure and reducing soil strength. This can cause the soil to behave like a viscous liquid.

For shallow foundations, liquefaction can result in loss of bearing capacity, excessive settlement, lateral spreading, and flow failures.

In deep foundations, liquefaction may reduce lateral capacity, induce additional down-drag forces, and increase demands on piles due to lateral spreading or flow failure of surrounding soils.

The presence of liquefiable soil does not mean the building site has to be abandoned or that deep foundations are required. In situ remediation of loose, cohesionless soils is common in geotechnical engineering. Earthquake drains can provide adequate soil liquefaction mitigation by dissipating excess pore-water pressure during seismic events before it reaches critical levels.

Why choose Keller for liquefaction mitigation?

Keller brings extensive ground improvement experience and active involvement in earthquake engineering to support performance‑based liquefaction mitigation. Working closely with owners and geotechnical engineers, we help evaluate site conditions and select mitigation strategies that meet seismic performance objectives while remaining practical to construct.