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Services: Foundation Support

Geotechnical Issue: Excessive settlement of soft soils and poor bearing capacity within stress bulb
Solution: Improved Ground with Stone Columns or Deep Soil Mixing

Settlement Reduction Principle:
  • Equal deformation in soil and reinforcing column.

  • Vertical stress distribution according to column stiffness and area replacement ratio, Ar.
Settlement Reduction Factor, n, by Ground Improvement Method:
  • Vibro-Stone Columns, n: 2 3

  • Cement Deep Soil Mixing, n: 10 - 50
Typical Allowable Bearing Capacities by Method
  • Vibro-Stone Columns: 2,000 to 4,000 psf

  • Cement deep Soil Mixing: 4,000 to 8,000 psf
Factor Affecting Soil-Cement Product
UCS (by Soil Type)

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