Unless you never stepped foot outside your house, you’ve seen weird burrowed holes in the ground.
With this, you probably wondered, “What’s up with these awkward holes in my community?” Now, there are a lot of possible answers to that, but a safe one would be this: for your protection.
Traditional land surveys often involve collecting parcels of land concrete to test its physical properties including resistance, ductility, yield, tensile strength, fracture toughness and fatigue strength. According to TSSurvey.com.au, methods such as vacuum excavation, which is a Non-Destructive (NDT) form of scanning equipment, helps a lot in scanning hazards deep within the ground.
Below are the types of NDT equipment for all engineering applications.
Magnetic Particle Testing (MT)
As literal as it sounds, an MT uses magnetic fields to locate distortions and flaws underground. With the use of electromagnets, the operator can generate a field of passable vision while there is an electrical current applied.
Liquid Penetration Testing (PT)
A PT takes advantage of the natural viscosity of the ground by inserting lightweight fluids to determine fissures and voids in a particular target area. The liquid becomes visible on the monitoring machine via its special colouring.
Ultrasonic Testing (UT)
Using the same technology as submarines, UTs have SONAR in place to scan for underground objects. The only difference between naval applications to ground use is that a UT has ultra-higher frequency to attune with materials deep within the bedrocks.
Electromagnetic Testing (ET)
Same as magnetic particle testing, an ET uses currents to detect and scan objects. But, only ET equipment can utilise and Alternating Current Field Measurement (ACFM), which is a remote field testing technique.
Acoustic Emission Testing (AE)
An AE operator applies localised external force like a mechanical load or sudden temperature or pressure changes to determine the composition of the target area. This results in stress waves that generate high-frequency feedback, which makes it possible to measure and analyse ground.