Measurement of Subsurface, Deep Foundation and Slab/Subgrade Conditions with In Situ Seismic, Sonic and Vibration Methodsby Larry D. Olson, Olson Engineering Inc, Lakewood, United States,
Abstract: Case histories are presented to illustrate quality assurance and forensic applications of nondestructive testing and evaluation (NDT&E) methods for in situ investigation of subsurface conditions, deep foundation integrity evaluations, and slab/subgrade support evaluations. The NDT&E methods presented herein are based on stress wave principles of geophysics and modal vibration principles of structural dynamics. The nondestructive methods typically provide engineers with critical data that cannot be economically and/or practically obtained with traditional destructive tests.
Subject Headings: Stress waves | Deep foundations | Vibration | Seismic waves | Case studies | Nondestructive tests | Subsurface investigation
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