Quality Control / Assurance
- Monitor grout volume, pumping rate, injection pressure, heave (deep/shallow).
- Over injection in primary phase may lead to early heave and reduced effectiveness.
Soil Mixing / Jet Grouting:
- Preliminary laboratory program strongly recommended.
- Cementation effect reduced by presence of organic content, low pH, sulfates, clay.
- Monitor grout SG, pumping rate, penetration rate.
- Verify with wet samples, ɯ” double-barrel cores, pressuremeter.