A hydro excavator uses water pressure and a vacuum tank to remove soil above utilities without damaging them. It is mounted on a truck chassis and uses an onboard vacuum pump and hose to suck soil into a storage tank. The water nozzle has a non-metallic tip to protect underground utilities. It is preferred for utility cases requiring overdraft as it prevents damage to fragile sewer tile or wiring. A special vacuum pump is required to remove an exact amount of soil with the right consistency. The removed soil can be dumped back to the removal site, saving backfill and dumping costs. The hydro excavator is also used for rescue missions and prevents accidental damage from blind digging practices.
A hydro excavator is a machine that uses water pressure and a vacuum tank to remove soil above utilities without damaging fragile utility components, such as wiring and water and sewer lines. The hydro excavator is typically mounted on a heavy truck chassis and uses an onboard vacuum pump and hose to suck loose soil off the ground and into the truck’s storage tank. Water for the hydroexcavator removal process is procured from local fire hydrants or other sources as needed. The water nozzle is attached to a large diameter vacuum hose with a non-metallic tip to protect underground utilities from damage by accidental contact with the hose.
In utility cases requiring overdraft, a hydro excavator is often the preferred method of removing overburden. A typical excavator equipped with a steel bucket/shovel could easily destroy fragile sewer tile or wiring. Using the hydro excavator, a jet of water is used to loosen the soil while a suction hose draws the water and soil into a waiting storage tank. The tube features a non-metallic tip to prevent damage to delicate wiring from contact with the tube.
A special vacuum pump is required to remove an exact amount of soil with the amount of water used. Without the correct vacuum pump, the removed soil may be of the wrong consistency to be reused properly. This could result in excessive labor time, excess water usage, and excessive material dumping, which could result in much higher costs to complete the project. Using the proper hydro excavator will ensure the greenest and most economical results. Often, the removed soil, if free of contaminants, can be dumped back to the removal site, saving backfill and dumping costs.
The hydraulic excavator units have been used successfully to uncover activities from underground utilities to landslide site rescue and rescue missions. The powerful water-removing action coupled with the vacuum suction of the hydro excavator creates a virtually water-free area directly under the hose nozzle. This allows operators to clearly see what is being discovered and prevents accidental damage from blind digging practices. The use of a hydro excavator also ensures that no more material is removed from the excavation site than is strictly necessary, thus preventing the subgrade from being weakened by undermining.
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