CHUM case study

Case History 1: Crosshole Sonic Logging vs. Core Drilling

A typical pile: bored and cast in place. Diameter: 1m (3ft)  length: 21m (68ft). 4 metal access tubes installed. Tested at an age of 14 days..

Two defects at ~12m (39ft)  and ~14m (46ft) are clearly visible and were verified by core drilling.

(Slight difference in depth due to the different location of the drilled core and the access tubes)

Logged results

Drilled cores




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Hemel Hempstead
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United Kingdom