INCREASING THE RELIABILITY OF THE LOW STRAIN INTEGRITY TESTING OF PILES UNDER EXISTING STRUCTURES

Inspection of piles located under the pile cap or an existing building is a common task in the practice of capital construction. The low strain impact testing allows us to estimate the pile length and the presence of defects in its body. This provides designers and builders with information on structures, which can be considered when planning the further operation of the foundation. Improving the reliability of test results for examining piles under cap is the issue of interest. On the example of field test results, the application of the multifrequency signal excitation during data collection and the wavelet analysis of signals during data processing are shown.