High resolution seismic imaging as a NDT tool for the shallow subsurface survey

The paper presents the successful application of the high resolution seismic reflection imaging (HRS) to survey of the shallow subsurface environment. Recent progress in this domain has been made both as regards the measurement system, the signal processing and interpretation techniques. It is shown that the HRS may be considered as the particular CND technique, adapted for detection in ground. Furthermore, it completes the use of the ground penetrating radar, for cases where its operation is no longer applicable. The enclosed field examples cover the different civil engineering applications, such as the stratigraphy of the shallow subsurface, the detection and location of the underground voids and the detection of the collapsed and filled-in grounds. It is shown that the HRS may be successfully used for the evaluation of risk of cavity collapse, as well as for the verifying the quality of filling of collapsing cavity with the cement mixture.