Method for evaluating the soundness of underground walls

The elastic wave caused by the input at wallhead spreads throughout plane of wall, and thus, inspecting soundness underground walls using a pile integrity test (PIT) is challenging task. This paper presents feasible method for evaluating via PIT. In particular, applying low-pass filter to reflected recorded wall head, components from ends cracks are effectively separated sides. Hence, through proposed strategy, can be clearly identified evaluation.