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Slurry Walls


Louisville, MS: Soil-Bentonite Slurry Wall/In Situ Soil Stabilization, American Creosote Works Superfund Site

slurry-bentonite-mansfield-la

Geo-Solutions Inc. was subcontracted by CORE Engineering & Construction, Inc. to complete the specialty geotechnical construction portions of the American Creosote Works (ACW) Superfund site remediation in Louisville, MS. Geo-Solutions' work components included the installation of a soil-bentonite slurry trench barrier wall and shallow stabilization of contaminated soils. The barrier wall was installed to a depth of 60' below ground surface (bgs). The slurry trench barrier wall installation was completed with a Komatsu PC800 excavator fitted with a specialty long stick. The shallow stabilization was performed with Portland cement to a depth of 3' - 4' bgs. The shallow stabilization was performed using excavator bucket mixing.

Project Objectives:

  • SB barrier wall permeability less than or equal to 1x10-7 cm/s
  • Stabilized material UCS greater than 100 psi

Description of Work:

  • Installation of 190,000 VSF soil-bentonite barrier wall
  • Maximum depth of 60' BGS, Average perm = 5x10-8 cm/s
  • Work completed over 22 weeks
  • Stabilization of 18,000 CYs of contaminated soils
  • Maximum depth of 3' - 4' BGS, Average UCS of 130 psi
  • Work completed over 11 weeks

Project Challenges:

  • Achieving a well mixed soil-reagent composite in a soft, plastic clay
  • Installing the barrier wall on a soft work platform - significant rain, spongy swamp soils



 
   

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