High Strain Dynamic Pile Load Test
Dynamic load test is a quick method to evaluate the bearing capacity of a pile for loads similar to design loads. It can be used for pre-fabricated piles, cast in-situ piles, steel piles or wooden piles.
Conducting the tests involve dropping an impact ram/ drop hammer onto the specially designed pile head. The generated compression waves travels down the pile and reflected from the pile toe upwards. The response of the reflected waves is captured through the sensors placed at the pile head. The reflected waves contain information about the shaft friction, toe resistance and pile defects.
The test is done in conformance with ASTM D4945-08 standard.
Cross Hole Sonic Logging of Piles and Diaphragm Walls
The Cross-hole Sonic Logging (CSL) method is used to perform high-resolution quality control of deep foundations including piles and diaphragm walls.
The system measures the FAT (First Arrival Time) and energy reduction of ultrasonic pulses sent from a transmitter to a receiver as they are simultaneously pulled up inside water filled parallel access tubes that have been cast in concrete at the time of construction.
The measured FAT and energy reduction are good measures of the concrete quality.
Conforms ASTM D 6760-08