Underwater pile visual inspection - A visual examination of the damage and stress of the pile structure in HK, a visual inspection of the pile carried out periodically, is essential for pile maintenance. In the visual survey, we look for signs of damage and stress on the pile structure.​​

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Underwater pile protection Wrap - Install protection wrap on the pile to prevent deterioration. After a period of time, underwater structures like piles start to deteriorate, to protect against the decay in the pile structure, a protection wrap should be installed.

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Underwater pile thickness measurement - Use the ultrasonic thickness gauge to measure the pile’s thickness against the original reading. The measure of the pile's thickness is part of the pile inspection procedure. After a period of time, the unprotected pile starts to deteriorate,  in order to find out the deterioration level, an ultrasonic thickness gauge can be used to compare the pile's thickness with the original reading. 

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Underwater seawall & seawall toe condition survey - The Seawall is the first line of defense to protect the shoreline, high sea waves continuously hit the seawall and result cavity between the block displaced and the concrete blocks, to check the seawall condition, we carry out seawall and seawall toe condition survey.​ A condition survey is essential, a guideline for further maintenance work.