News

HVEA Expands Capabilities to include Crosshole Sonic Logging (CSL) and Crosshole Tomography (CT)

February 27, 2013

Beacon, New York - HVEA is pleased to announce that the firm is now offering Crosshole Sonic Logging (CSL) and Crosshole Tomography (CT) Imaging of drilled shaft foundations.

Crosshole Sonic Logging (CSL) is one of the most reliable non-destructive testing (NDT) methods for achieving quality assurance of concrete placement drilled shaft foundations. The CSL test is an acoustic method where an ultrasonic transmitter and receiver are placed in pairs of downholes in a drilled shaft foundation. As the transmitter emits an ultrasonic pulse, the receiver in a nearby tube measures the travel time of the wave. Areas with comparatively longer travel times point to slower wave velocities, indicating defects such as water intrusion, voids, or similar flaws in the concrete structure.

Crosshole Tomography (CT) Imaging is a more rigorous method that is often employed after CSL discovers a defect. The CT method uses a moving source and a fixed receiver. The receiver is incrementally moved throughout one tube as the transmitter is repeatedly passed through nearby tubes. Data from thousands of transmitter-receiver combinations are collected. This data is processed to yield a 2D or 3D tomogram, which will provide a realistic image of the defect. The image can be a valuable tool used by engineers to develop remediation methods.

HVEA is a regional firm providing engineering, consulting, construction inspection and material testing and related services. Our fully equipped construction materials testing lab is accredited by the AASHTO Materials Reference Laboratory (AMRL) and inspected by the Cement and Concrete Reference Laboratory (CCRL).

We can help contractors, engineers and owners meet their DBE/WBE goals. HVEA is a certified W/DBE in New York State, and a certified WBE by New York State Economic Development and by the Port Authority of New York and New Jersey (PANYNJ).

Contact Jessica Mariani, P.E. at (845)838-3600, or Email Jessica