Electromagnetic Survey

Soil conductivity investigation around Melbourne coastal areas using our all terrain vehicle towing a custom made equipment mounting trailer.  This system can cover many hectares a day under the right conditions, great for early reconnaissance on large sites.

GPR Investigation

Radiotech were commissioned to perform investigation works along the Yarra River in Melbourne on old wharf infrastructure as part of the on going South Wharf development project. As you can imagine, there are virtually no records remaining from the original construction so Radar investigation is an invaluable tool to assist with forward planning.

Ground Penetrating Radar (GPR)

The technology uses electromagnetic (EM) waves transmitted from an antenna (which reflects on layers and objects in the ground. These reflections are received with an antenna (Rx) and create a picture of the subsurface. As the transmitting and receiving antenna is moved along the surface, recordings are collected and displayed side by side, resulting in a cross section, also known as radar profile.

GPR can be used in a variety of media including rock, soil, ice, fresh water, concrete, pavements and structures, and it can detect objects, voids, cracks and changes in material.

The resolution and investigation depth is depending on the antenna frequency used; most often ranging from 10 MHz to 2.3 GHz. High frequency antennas give high resolution images but low penetration, and low frequency antennas gives better penetration depth with lower resolution.