Abstract
The Cross-hole Sonic Logging (CSL) technique is one of the most effective quality assurance methods for testing foundations in terms of assessing the homogeneity and integrity of in-situ concrete foundation elements. This paper aims to study the effects of sonic access tube materials (such as polyvinyl chloride (PVC) and steel) on the signal strength of ultrasonic waves when carrying out a CSL test. This aim was achieved by the use of an in-house developed multi-channel ultrasonic data acquisition prototype, referred to as the ‘Multiple Referencing System’ (MRS). The prototype was developed based on National Instruments (NI) hardware in a LabVIEW (Laboratory Virtual Instrument Engineering Workbench) environment. It was designed for pre-programmed data acquisition, processing and visualising. With the development of the in-house developed prototype MRS, the transmission velocity and signal strength of the acquired waveforms were determined by the use of different sonic access tubes. According to the experi...
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