Directional drilling icon12/27/2022 ![]() ![]()
Due to the hard soil conditions and extremely tight line and grade tolerances required, ICON recommended the Front Steer Microtunneling System from Bohrtec. Running out of ideas, Three Point then contacted ICON Tunnel Systems for possible alternative solutions. “The crane required to make the lift would have been costly and there was also no room to set it up”, says Mike. The size of the tunnel boring attachment would also prove to be an issue as Three Point would need a crane for the installation and dismantle process. However, it was ultimately decided that the tunnel boring attachment would not be feasible due to the amount of time for setup and dismantle. ![]() We then considered using a tunnel boring attachment as the only other viable alternative.” #Directional drilling icon manual“In addition, the manual steering and lag head would not have been precise enough to hit the target. “The pilot tube system would not have penetrated the soil due to its density and the presence of quartz,” says Boyd. Three Point had past experience on several jobs with Pilot Tube Microtunneling Systems rented from ICON, but they also knew it was only designed for use is soft, displaceable soil and not hard ground conditions. “With only inches to spare on either side of the 42 inch steel casing in the receiving pit due to an existing duct bank and building footing, accuracy and precision on line and grade were paramount,” Boyd continues.ĭue to the difficult nature of the project, Three Point decided to do some homework and research a variety of trenchless alternatives to conventional auger boring. “This bore would had to be extremely accurate because we have to maintain a minimum distance beneath existing utilities such as two water lines, a gas main, numerous communications duct banks, the main electrical feed to the campus, two causeway footings and the root systems of two oak trees” says Mike Boyd, President of Three Point Construction, Inc. At the location of the bore the conditions were going to be very hard schist with a high content of silica and hard quartz. ![]() Having already completed work on this project gave the contractor a direct knowledge of the soil conditions that would be encountered. #Directional drilling icon installAs part of the work Three Point had to install a 200LF, 42 inch diameter steel casing that would accommodate a large duct bank with 24 individual conduits for a new high speed communications system. Miller of Hampsted, MD as the tunneling subcontractor for a difficult utility project located at the Applied Physics Laboratory at Johns Hopkins University. Since 1982, ICON has expanded its company and knowledge to become a full-service industry leader in the trench shoring and underground guided auger boring markets, providing our customers with the sale, rental, and manufacturing of our equipment and products.Laurel, MD – Three Point Construction Inc., of Mechanicsville, MD has successfully completed the first ever Front Steer Microtunneling project in the USA with a Bohrtec BM400L machine from Icon Tunnel Systems. Active preloading of trench walls maintains the vertical trench sides, preventing soil from moving or collapsing inward. #Directional drilling icon fullTypically one worker can safely and effectively shore a trench as quickly as it is excavated, allowing the excavator to operate at full digging capacity. ICON also offers lightweight aluminum hydraulic shoring as one of the safest, most versatile means and methods of shoring even the most difficult excavation. ICON can deliver the expertise, equipment, and personnel to make your next project happen safely, on time, and budget. The company also provides a comprehensive line of services that includes consulting, design, engineering, manufacturing, repair, competency training, excavation safety, and field services. ICON Equipment manufactures and distributes directional drilling equipment, trench boxes, tunnel boring machines, and directional boring machines for many trenchless technology applications. ![]()
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