Jointly organized by AMC, CAD and
EVD
Programme Highlight
This presentation report
the finding from a feasibility study on the use of Time Lapse Ground
Penetrating Radar (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.
Speaker
Ir Kenneth C W Pak, Senior Lecturer of Department
of Construction, Hong Kong Institute of Vocational Education. Currently he is the
Programme Leader of Higher Diploma in Civil Engineering and Programme Leader of
several training programmes related to construction material testing. He is a
PhD candidate of the RMIT University, Australia. His main research topic
related to Non-destructive Tests, especially Time Lapse Ground Penetrating
Radar (GPR) for geophysical application.
Registration
& Enquiries
The seminar is free of charge with maximum of participants of 80. No
prior registration is required. Please come for walk-in registration on 8 March 2019 on/before 6:30 pm . For details, please visit AMC
website (http://www.amc.hkie.org.hk).
For enquiries, please contact Mr. Benjamin Lam at bencamay1119@gmail.com .
Attendance certificate will be awarded after seminar.