PNNL

Abstract

This is the first part of an investigation on improved assessment of mass concrete dams using Acoustic Travel Time Tomography (ATT). It presents the concept and basic science for ATTT. ATTT combines aspects of ultrasonic measurements previously used for material characterization, ultrasonic methods applied to test concrete and features of methods used in shallow seismic surveys. This science/technology is integrated into a system that records travel time data and applies tomography software.