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More contactsThe Grouted Helical Micropile does not require removing spoils from the site. By combining both end-bearing on the helical plates and skin friction along the rough surface of the grout column, the result is a higher-capacity pile system.
Speed: 40–50 piles per day/per crew
High capacity
Predictable results
Cost-effective
Labor-saving: smaller crews
No pre-drilling
Resistance to buckling in weak soils
Stiffer pile (deflects less at a particular load)
Additional corrosion resistance in aggressive soils
Deep Foundation Applications
Commercial/industrial
High capacity/greater than 100 tons
Underpinning applications
New construction
Build on weak soil sites
Limited access
Bridges
Grouted Helical Micropile Installation
The Grouted Helical Micropile Systems are used to form a grout column around the shaft of a standard helical anchor/pile. The installation process can employ grout only or grout in combination with either steel or PVC casing. To start, a helical anchor/pile drives into the soil by applying torque to the shaft. The helical bearing plates require significant force or torque to advance the helical pile into the soil.
From a reservoir at the surface, a flowable grout immediately fills this void surrounding the shaft. Additional extensions and displacement plates are added until the helical bearing plates reach the minimum depth required or competent load-bearing soil. This displacement pile system does not require removing spoils from the site.
Specification:
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Component
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Material Grade
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Dimensional Tolerance
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Surface Treatment
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Mechanical Properties
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Main Shaft
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ASTM A36 / ASTM A106 Grade B / Q235B
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Diameter: ±0.5mm; Length: ±10mm
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Hot-dip galvanizing (≥85μm zinc layer) / Epoxy coating (≥300μm)
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Yield strength ≥240MPa; Tensile strength ≥400MPa; Elongation ≥20%
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Helical Plates
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ASTM A36 / Q355B
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Thickness: ±0.3mm; Diameter: ±1mm; Pitch: ±2mm
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Same as main shaft
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Yield strength ≥240MPa (A36) / ≥355MPa (Q355B); Brinell hardness ≥120HB
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Couplings (for extended shafts)
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ASTM A105
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Thread tolerance: 6g/6H
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Hot-dip galvanizing
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Tensile strength ≥485MPa; Yield strength ≥250MPa
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Applicable Scope: Grouted helical micropiles for foundation support in civil engineering, geotechnical engineering, construction of industrial/commercial buildings, residential buildings, slope stabilization, and foundation reinforcement of existing structures
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Dimensional Specifications
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Pile Model
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Main Shaft Diameter (D)
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Helical Plate Diameter (d)
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Plate Thickness (t)
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Plate Pitch (p)
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Standard Shaft Length
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Max Grout Column Diameter
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BA-GHP-001
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76mm (3")
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200mm / 250mm / 300mm
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8mm / 10mm
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150mm / 200mm
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3m-6m
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150mm-200mm
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BA-GHP-002
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89mm (3.5")
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250mm / 300mm / 350mm
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10mm / 12mm
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200mm / 250mm
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3m-8m
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200mm-250mm
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BA-GHP-003
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108mm (4.25")
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300mm / 350mm / 400mm
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12mm / 14mm
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250mm / 300mm
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4m-10m
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250mm-300mm
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BA-GHP-004
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114mm (4.5")
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350mm / 400mm / 450mm
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14mm / 16mm
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300mm / 350mm
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4m-12m
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300mm-350mm
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BA-GHP-005
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140mm (5.5")
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400mm / 450mm / 500mm
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16mm / 18mm
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350mm / 400mm
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5m-15m
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350mm-400mm
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