Concrete strength (MPa): Four sets of test specimens are used to verify compliance with the acceptance standards.
Pile position (bent piles): A theodolite is used to check whether the longitudinal and transverse deviations are within the allowable limit of 50 mm.
Borehole inclination: The inspection results are compared against records made prior to concrete placement; the allowable deviation is 1%.
Sediment layer thickness (end-bearing piles): Checked against pre-placement records to ensure it does not exceed design specifications.
Elevation of the bottom of the reinforcement cage: Verified against pre-placement records; the allowable deviation is ±50 mm .
