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How Does Hydro Vacuum Excavation Work?
By: Sure Search
Hydro vacuum excavation is one such innovation. Not only does this relatively new technique improve excavation speed, but it also reduces various safety and health risks.
What is Hydro Vacuum Excavation?
Hydro excavation is a non-mechanical, non-destructive digging technique that utilizes pressurized water with a specialized industry-grade vacuum to excavate soil from the selected area. The pressurized water is used to break up the soil and transform it into a slurry which is then removed with the vacuum and deposited into a debris tank.
How Does it Work?
Bringing the Hydro Evacuation Truck/Unit to the Site
A Hydro excavation truck is the primary ingredient of a hydro excavation project. The excavation unit is mounted on a trailer or a truck. It features a high-pressure water hose, a storage tank for water, a suction hose, and a tank to store the loosened soil.
Injecting the Soil With Water
Whether hydro-excavating or daylighting a hole or a slot trench, the soil is injected with water from the holding tank. Then, the operator uses a specialized wand to direct the water to a precise location. If the excavation is performed during winter when the ground is frozen, a boiler sends hot water via the hose and wand to unfreeze the soil.
Liquefying the Soil
Depending on the soil type, e.g. silty loam, clay, sand, etc., the water starts to break up the soil. Once a certain amount of time is passed, the broken-up soil starts to liquefy into a watered-down, muddy soil known as slurry.
Vacuuming the Slurry
Once the soil becomes loose and consistent, the vacuum unit mounted on the truck sucks it up. Then, the slurry gets transferred into a holding tank for later release.
Hydro-excavating crew have two options when it comes to vacuum, and they make a selection depending on the scope and size of the project. For lighter-duty digging, e.g. hole digging, slot trenching, etc., the crew typically uses a fan system.
Dumping the Slurry
Once the excavation is completed, the crew takes the slurry to an off-site location to pump it out. Some of these designated sites dewater the slurry to collect and reuse the organic materials found in the soil.
Contact Sure Search and ask about our Hydro Vacuum Excavation (https://suresearch.com.au/
1300 88 45 20
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