Horizontal Directional Drilling
Directional boring, commonly called horizontal directional drilling or HDD, is a steerable, trenchless method of installing underground pipes, conduits and cables in a shallow arc along a prescribed bore path by using a surface-launched drilling rig, with minimal impact on the surrounding area. Directional boring is used when trenching or excavating is not practical. It is suitable for a variety of soil conditions and jobs including road, landscape and river crossings.
Directional boring is used for installing infrastructure such as telecommunications and power cable conduits, water lines, sewer lines, gas lines, oil lines, product pipelines, and environmental remediation casings. It is used for crossing waterways, roadways, shore approaches, congested areas, environmentally sensitive areas, and areas where other methods are costlier or not possible. It is used instead of other techniques to provide less traffic disruption, lower cost, deeper and/or longer installation, no access pit, shorter completion times, directional capabilities, and environmental safety.
The technique has extensive use in urban areas for developing subsurface utilities as it helps in avoiding extensive open cut trenches.
The process of Hydro Excavation, the only non-destructive method of digging, utilizes pressurized water and a vacuum system to quickly and safely expose underground infrastructure.
During the hydrovac process, pressurized water is injected into the ground through a handheld wand. As the soil cover is liquified, the resulting slurry is simultaneously extracted by a powerful vacuum and stored in a 14 yard debris tank onboard the hydrovac.
Hydrovacs can dig effectively in all soil types, including clay, and with the aid of onboard heaters, hydrovacs provide a safe means of digging in frozen ground.
Beneath the soil lies a complex maze of facilities carrying petroleum products, electricity, water, wastewater, natural gas, and telecommunications. Every single day incidents occur across the country that leave utilities damaged, property destroyed, workers injured or worse. The added cost of using a hydrovac on a project can be negated by the increased productivity achieved on the job. By clearing a path through utility conflicts, a hydrovac can help contractors put more pipe in the ground per day, install more poles per day, or complete more service repairs in a day.
Hydrovacs add value to projects by helping contractors get more out of their existing resources. The beauty of the hydrovac solution is that all of this can be done without the risk of causing damage to existing infrastructure. Improved productivity and safe work methods translate into profit for those working in today's underground environment
Excavators are used in many ways:
Digging of trenches, holes, foundations
Brush cutting with hydraulic attachments
Mining, especially, but not only open-pit mining
Driving piles, in conjunction with a pile driver
Drilling shafts for footings and rock blasting