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Jet Grouting


Jersey City, NJ: Former West End Gas Plant Remediation, Jet Grouting at Utility Crossings and Short Sheetpile Locations

grouting-jet-grouting-jersey-city-nj

Geo-Solutions Inc. was subcontracted to complete jet grouting around utility crossings in order to complete a perimeter containment system. The jet grouting was completed using a single fluid jet grout system. The jet grouting parameters were selected to ensure 4' - 5' diameter columns in the soils expected at the jet grouting locations. Numerous attempts were needed to install each column due to unknown subsurface obstructions.

  • Installation of 13 four foot and 2 five foot diameter jet grout columns
  • Maximum depth of 80' BGS
  • Average UCS of grab samples was 800 psi after 28 days
  • Average permeability of grab samples was 5x10-8 cm/s after 28 days
  • Work completed over 1 week

Key Project Objectives:

  • Complete tie-in between sheetpile walls on both sides of utilities and between sheetpile bottom and "bedrock"
  • Ensure that the jet grout barrier had a permeability less than 1x10-6 cm/sec

Project Challenges:

  • Achieving full tie-in between utilities due to the high prevalence of subsurface obstruction
  • Working immediately adjacent to the river



 
   

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