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Recent content by Groutboy

  1. Groutboy

    hydro fracturing

    Currently "Contact Grouting" around and existing tunnel 60-100 ft deep at pressures equal to 1 psi per vertical foot with a high mobility grout. Grout is surfacing with little indication that grout is around the tunnel. Tunnel was installed in the 60's.Soils range from medium to stiff clays and...
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