Determination of underground pipe depth at different type soil using high low frequency / Ahmad Nuruddin Mohd

This study examined to identify the depth of pipe at different type of soil by
using different frequency. The frequency for this research were 250MHz and 800MHz
antenna. Accuracy was a main factor to penetrate the underground utility. Ground
Penetrating Radar was an interesting measurement technique for mapping
underground surface. GPR using different frequency which were 250MHz and
800Mhz used to scanning underground utilities at different type of soil. Beside that,
the research was helping by software 2D Reflex for the data collection, data
processing and analysing the outcome result The depth was known before scanning
and compare between actual depth with the observation depth from GPR given. The
data must be do the correction by using software cause by the other factor such as
noise. After do the process in software, the true depth will appear. If the higher of the
antenna, the penetration was shallower die depth of penetration. The actual depth had
been measure by using conversional method which were measure using tape and
levelling method. The result show the suitable frequency that good to use for utilities
underground was 250MHz because the frequency can penetrate deeper depth which
was more than 1 metre depth. The GPR antenna more can penetrate to both of soil but
the sand soil much more detected pipe. Lastly, apart from the aim study was to The
aim of this study is to analyse the good frequency for depth measurement of buried
pipe from different type of soil, it was also done in intention to help other surveyor to
get the quality of accuracy by using this research.