Assisted by Akkerman’s Field Service Technician, Lamont Andrews, Metro Horizontal Boring commissioned their new Akkerman 240A GBM system at one of the world’s busiest airports. This 200-ft drive was performed at a negative 0.3% grade with just 6-ft of cover.
• Low Ground Cover: With only 6 feet of cover above the bore path, there was limited margin for error, increasing the risk of surface disruption or breakthrough.
• Negative Grade Installation: The 200-foot drive had to maintain a precise -0.3% grade, requiring tight control over line and elevation throughout the bore.
• Variable Soil Conditions: The bore traversed a mix of sandy to firm clay soils, which posed challenges for maintaining bore stability and consistent advancement.
• High-Security Site: Working at one of the world’s busiest airports demanded strict safety protocols, coordination, and minimal disruption to airport operations.
• Precision Guided Boring System: Metro Horizontal Boring used the Akkerman 240A GBM system with a high-accuracy guidance system to maintain the precise line and grade, even at a slight negative slope.
• Expert Onsite Support: Akkerman Field Service Technician Lamont Andrews assisted with system commissioning and setup, ensuring smooth operation from the start.
• Stabilization and Lubrication: The integrated lube system supported ground stabilization, reduced friction, and helped manage soil variability during the bore.
• Custom WORH Adapter: A 20-inch Weld-On Roller Head (WORH) adapter was used to accommodate the steel casing and ensure smooth, controlled installation under the tight site conditions.
• Accurate, On-Grade Installation: The 200- foot steel casing was successfully installed on a precise -0.3% grade, meeting all project specifications.
• No Surface Disruption: Despite only 6 feet of ground cover, the bore was completed without impacting surface structures or airport operations.
• Smooth Equipment Commissioning: With onsite support from Akkerman’s field technician, Metro Horizontal Boring efficiently deployed their new 240A GBM system.
• Successful First Project: The project marked a confident launch for the contractor’s new guided boring system, proving its capabilities under high-stakes conditions.
