Drilling Methods & Equipment
Several different methods exist for advancing a steel casing or grout injection pipe to a desired design depth for compaction grouting. The differing techniques are typically dictated by soil conditions, project size, injection depth and access limitations. Caution must be exercised to specify a drilling technique that does not aggravate a problem soil condition by subjecting the subsurface strata to excess vibration, water or uncontrolled air pressure. These can actually induce settlement and can be risky when drilling near existing structures. Some of the more popular methods used to advance injection pipes include:

• Auger Drilling Techniques
• Percussion Drilling Techniques
• OdexTM or TUBEX
• Vibratory Drilling Techniques (Crane & Mandrel)
• Air Rotary or Rotary Wash
• Grout Pumps
• Grout Sources
• Grout Mixes
• Slump Test