Feasibility Study of Time Lapse Ground Penetrating Radar as Monitoring Measures for Deep Excavation Works

C. W. Kenneth Pak, G. Ren, J. Li, Wallace Wai Lok Lai

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This paper studies the feasibility of the Time Lapse GRP (TLGPR) to be a monitoring measures for deep excavation works. The TLGPR aims to quantify the difference between two radargram collected along boundary of construction site at different time. It provides an information on the degree of change, or even formation of void, in the soil mass being retained by lateral support. Non-signal processed data (256 samples per trace) were input to an in-house LabView programme for Wavelet Transform (WT) to determine the peak frequency of A-scan at particular time-depth. By comparing the differences in peak frequency at different time, changes in soil mass identified. Result shows that the TLGPR able to quantify the degree of change between two radargram. Moreover, due to the TLGPR is comparing the difference in frequency domain, it is capable to identify differences which are not visually notable from signal processed image.

Original languageEnglish
Title of host publication2018 17th International Conference on Ground Penetrating Radar, GPR 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781538657775
DOIs
Publication statusPublished - 20 Aug 2018
Event17th International Conference on Ground Penetrating Radar, GPR 2018 - Rapperswil, Switzerland
Duration: 18 Jun 201821 Jun 2018

Publication series

Name2018 17th International Conference on Ground Penetrating Radar, GPR 2018

Conference

Conference17th International Conference on Ground Penetrating Radar, GPR 2018
CountrySwitzerland
CityRapperswil
Period18/06/1821/06/18

Keywords

  • GPR
  • Ground Penetrating Radar
  • Temporal
  • Time lapse

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Instrumentation

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