Quality Control and Quality Assurance

Pile foundation construction

  • Inspect and test concrete to ensure conformity of foundations to drawings and specifications.
  • Inspect and record conditions at the pile toe using our downhole camera for designs requiring pile resistance to be developed through end bearing.
  • Use acoustic monitoring equipment (Saximeter) for single acting diesel hammers to log set and stroke of a driven pile, allowing an assessment of potential energy during driving.
  • Evaluate cast concrete pile integrity using cross hole sonic logging (CSL) and the CHAMP-XV system from Pile Dynamics, Inc. The CHAMP-XV meets or exceeds the specifications for cross hole sonic logging required by ASTM D6760 Standard Test Method for Integrity Testing of Concrete Deep Foundations by Ultrasonic Crosshole Testing.
  • Design and test static pile load test piles using reaction piles or the Osterberg Cell (O-Cell) from Loadtest, Inc.
  • Use of a pile driving analyzer (PDA) for dynamic load testing and to assess pile resistance and stresses by the Case Method and iCAP®, or CAPWAP (CAse Pile Wave Analysis Program). PDA tests are performed during or after installation of steel or concrete piles.  Piles are instrumented with accelerometers and strain gauges to measure the pile response to a high strain impact from a driving hammer.  Data collected can be analyzed in the field or post-processed for detailed analyses of pile performance. Testing and reporting is in accordance with ASTM D4945 Standard Test Method for High-Strain Dynamic Testing of Deep Foundations.  Confirming pile capacity as part of a QA/QC program allows the geotechnical designer to use a higher resistance factor that generally reduces the cost of a foundation.