Trial pit test is a standard method for evaluating rockfill compaction in dam construction. The advent of 3D laser scanning technology offers a rapid

accurate alternative to the traditional water filling method for measuring the pit’s volume. This study develops a new method that integrates data acquisition

registration

and fast volume calculation using 3D laser scanning. Tested against the standard model and a laboratory experiment

the method captures the irregular distribution of rockfill particles effectively; Optimizations in large-scale in-situ tests have achieved volume measurement errors roughly within 5%. Field applications in dam projects further validate the method's efficiency

significantly reducing inspection time and having the potential to replace traditional methods.