White Rock North, Water Transmission Main Failure Investigation
The White Rock North Water Transmission Main is a 17 mi, 84 in. dia. prestressed concrete cylinder pipeline, embedded cylinder type, which delivers approximately 200 million gallons per day of treated water. SGH was hired as a subconsultant to Halff Engineers to perform a failure investigation of the transmission main after a pipe segment ruptured.
SGH performed a failure investigation involving the following:
- Hydraulic analysis
- Soil and geotechnical tests
- Corrosion potential surveys
- Stress analysis of pipe
- Chemical and petrographic analysis of mortar coating
- Scan electron microscopy/energy dispersion spectroscopy of mortar coating
- Mechanical testing and metallurgical analysis of prestressing wire and steel cylinder
- Inspection of failed and adjacent pipes
SGH also determined that carbonation of the mortar coating was extensive and variable around the pipe circumference and that the likely primary cause of the rupture of the pipe was carbonation of the mortar coating from acidic groundwater.
Failure Investigation | Repair & Rehabilitation
Advanced Analysis | Applied Science & Research
Infrastructure & Transportation
Halff Associates, Inc.
Buried Infrastructure | Failure Analysis | Physical Testing | Materials Science | Microscopy
Key team members
Crom Corporation, Elevated Prestressed Concrete Water Tanks
Since the early 1980s, SGH has worked with Crom Corporation to assist them in their tank designs. The elevated tanks, with a capacity of between 1.5 MG and 2.0 MG, are thin prestressed concrete shell structures.
Port of Corpus Christi, Dock Fender Optimization Study
SGH conducted a study to review the existing infrastructure and provide recommendations for improving the fender systems at eleven oil docks, three solid bulk handling docks, and seven general cargo docks.