—Existence of cavities and weak zones on chalky
limestone and gypsum was explored in an underneath break
pressure tanks by using Ground Penetrating Radar (GPR)
method even the geotechnical method was used. Therefore,
three different frequencies range of ground penetrating radar
were used in order to cover different depths under the tanks
foundation. The GPR survey pinpointed the positions of many
anomalies which exist underneath tank (Ι). The anomalies can
be a cavity or a type of formation of high reflection of signal
indicating unfastened type of formation which may turn to a
cavity at any time. However, the geotechnical result which
represented in drillings at selected locations confirmed the
existence of these cavities nearby or extending underneath tank
(Ι) at the depths of 1 m to 5.0 m.
—Ground penetrating radar, break pressure
tanks, cavities, an-nuwfaliyah.
Fathi A. Swaid is with Man-made River Water Utilization Authority,
Middle Region, Libya (e-mail: firstname.lastname@example.org).
Cite: Fathi A. Swaid and Khaled Elmahishi, "Detection of Cavities and Weak Zones underneath the
Break Pressure Tanks at An-Nuwfaliyah, Libya," International Journal of Engineering and Technology vol. 7, no. 2, pp. 122-125, 2015.