WHAT WE DO
Soldier Beams & Lagging, Tiebacks, Deep Soil Mixing, Secant (water cutoff) Walls, Soil Nails, Shotcrete
American Drilling Specializes in all types of Earth Retention Shoring. These can either be temporary or permanent walls. These include: soldier beam and lagging, either deep soil mix (DSM) or wood lagging; We also construct soil nail and shotcrete walls, secant/groundwater cut-off walls, tiebacks, stitch piers, and sheet pile shoring. We are uniquely qualified to assist you in a design that provides the most economical and safe solution for your job site.
Deep Soil Mixing
Deep Soil Mixing (DSM) has a wide variety of subsurface applications. We combine DSM techniques with the methodology of soldier pile and lagging to serve as a Deep Soil Mixed temporary shoring system. Deep Soil Mix replaces wood lagging, and lean/ hardrock concrete of the traditional system, creating efficiency and reducing project duration. DSM is a soil treatment process where in place native soils are mixed with cement and other admixtures to increase the strength, reduce the compressibility, and can also be used to create underground water cut-off (barrier) walls, or freeze contaminated soils in place.
Soldier Pile & Lagging
Soldier Pile and Lagging is an excavation support technique where vertical steel piles (called soldier beams) are drilled, or driven into the ground around the perimeter of the excavation at regularly occurring intervals, typically 4′, 6′, 7′ or 8′ on center. After the soldier piles are installed, and as excavation proceeds, in lifts toward the bottom, wood lagging is placed between the soldier piles to support the soil. Typically these systems are designed as cantilever, however for taller excavations Tiebacks or Internal bracing can be used for lateral restraint.
Soil Nail & Shotcrete
Soil Nails and Shotcrete excavation support techniques involve drilling in relatively short ‘soil nails’, which are small diameter horizontal grouted anchors, and covering the nails with wire mesh, then shooting a thin layer of shotcrete over the soil embankment and the mesh. The mesh and shotcrete tie together with the soil nails to support a vertical soil embankment. These systems are typically installed in 5′ vertical lifts from the top – down.
Secant Water Cutoff Walls
Secant Deep Soil Mix (SDSM) walls are temporary excavation shoring walls which are designed to handle the water surcharge weight behind the shoring wall. These walls often have a more frequent soldier pile spacing than traditional walls, and have admixtures to make the lagging more water-impermeable than typical deep soil mix. Secant walls are appropriate for excavations with high ground water tables, projects in neighborhoods that may be sensitive to deep well dewatering, or sites known to contain toxic, contaminated soil/groundwater.
Sheet Piles are continuous, interlocking steel panels which are driven into the ground around the perimeter of an excavation to support soil for temporary excavations. Sheet piles are installed with a vibratory hammer, and may require pre-drilling is stiffer soils. Sheet piles can be used for permanent or temporary shoring, and can reduce groundwater intrusion into an excavation and are often used in marine construction, or for bulkhead walls. For temporary projects sheets are typically rented, then removed and returned upon completion of a project.
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