Subsurface GPR imaging of a potential collapse area in urban environments

Yih Jeng*, Chih Sung Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


Ground penetrating radar imaging is one of the promising nondestructive and noninvasive methods that have offered new opportunities for mapping the subsurface structures of shallow earth in highly urbanized regions. In this study, we performed the ground penetrating radar survey in a potential collapse urban area. The acquired data were processed through the logarithmic transformed ensemble empirical mode decomposition (EEMD) methodology that reduces the exponential decay of the original data and extracts meaningful images. This method proves successful in imaging the top pavement layers, utilities and voids within approximately 2. m depth. Moreover, the quality of the subsurface image can further be improved by using the sub-component EEMD filter bank. Through a control study followed by the general field survey and direct excavations, we demonstrate the efficiency and quality of this method in mapping shallow structures in an urban area. An interpretation of the cause for the collapse in the study area is also proposed.

Original languageEnglish
Pages (from-to)57-67
Number of pages11
JournalEngineering Geology
Publication statusPublished - 2012 Oct 12


  • EEMD
  • GPR
  • Logarithmic transform
  • Shallow imaging
  • Sub-component

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology


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