Combination helical piles integrate square shaft lead sections with round shaft extensions to deliver enhanced foundation performance. The square shaft penetrates dense soils and generates bearing capacity, while round extensions provide lateral load resistance and buckling stability. This hybrid design addresses challenging conditions where hard layers lie beneath softer strata.
These piles are manufactured from high-strength galvanized steel, including seamless tubing with minimum yield strengths for superior torsion and load-bearing capabilities. Helical plates are welded to shafts, with inertia-welded connections enhancing strength and durability. Standard configurations include 1.5-inch square leads with 2.875-inch round extensions, 1.75-inch/3.5-inch, and 2.25-inch/4.5-inch systems. Helix diameters range from 8 to 14 inches, with extension lengths of 42, 64, and 84 inches.
Load capacity is determined through torque correlation and soil bearing analysis, with ultimate capacities reaching 150 kips for certain models. Installation uses hydraulic torque motors to screw piles into the ground, achieving immediate load-bearing capacity with minimal soil disturbance and no excavation. This allows efficient placement in confined or sensitive sites.
Applications include residential foundations, commercial buildings, docks, bridges, and remedial work such as foundation repair and underpinning. The piles offer reduced concrete usage and carbon emissions, minimal excavation to preserve landscapes, and quieter installation with less vibration.
RaxPower Combination Helical Pile Supplier: Superior Strength and Cost-Effectiveness
RaxPower is a leading manufacturer of helical piles throughout China, known for its custom, ICC-certified helical piles and LEED-certified manufacturing. With over 21 years of experience since its establishment in 2003 in Hebei Province, our company utilizes patented inertia welding technology to produce the world’s strongest anchors.
This results in Combination Helical Piles that are much stronger than competitors, allowing for smaller pile sizes and more competitive bids. Our high-quality seamless steel tubing and precision CNC machined tool joints ensure superior strength and durability.
Helical piles offer quick installation, cost-effectiveness, and minimal site disturbance, supporting applications in foundation repair, new construction, and environmental projects.
Our commitment to innovation, strength, and environmental responsibility through LEED certification makes us a trusted partner.
Put RaxPower to work for you. Please give us a call or complete the contact form below.
| Component Type | Shaft Size (in) | Standard Length (in) | Helix Diameters (in) | Max Installation Torque (ft-lb) | Ultimate Capacity (kip) | Material |
|---|---|---|---|---|---|---|
| Lead | 1.5″ Square | 60 | 10-12-14 | 5,500 | 91.0 | High-Strength Galvanized Steel |
| Lead | 1.5″ Square | 84 | 8-10-12 | 5,500 | 78.8 | High-Strength Galvanized Steel |
| Lead | 1.75″ Square | 60 | 10-12 | 10,400 | 73.4 | High-Strength Galvanized Steel |
| Lead | 1.75″ Square | 84 | 10-12-14 | 10,400 | 113.6 | High-Strength Galvanized Steel |
| Lead | 2.25″ Square | 84 | 8-10-12 | 15,000 | 130.9 | High-Strength Galvanized Steel |
| Lead | 2.25″ Square | 84 | 10-12-14 | 15,000 | 150.0 | High-Strength Galvanized Steel |
| Extension | 2.875″ Round | 42 | N/A | 7,500 | 31.6 | High-Strength Galvanized Steel |
| Extension | 2.875″ Round | 64 | N/A | 7,500 | 40.7 | High-Strength Galvanized Steel |
| Extension | 2.875″ Round | 84 | N/A | 7,500 | 51.0 | High-Strength Galvanized Steel |
| Extension | 3.5″ Round | 64 | N/A | 11,400 | 54.4 | High-Strength Galvanized Steel |
| Extension | 3.5″ Round | 84 | N/A | 11,400 | 67.8 | High-Strength Galvanized Steel |
| Extension | 4.5″ Round | 64 | N/A | 26,000 | 93.0 | High-Strength Galvanized Steel |
| Extension | 4.5″ Round | 84 | N/A | 26,000 | 117.0 | High-Strength Galvanized Steel |
Frequently Asked Questions（FAQS）
What is a combination helical pile?
Combination helical piles integrate square and round shaft designs, featuring a square shaft lead section for penetrating dense soils and generating bearing capacity, followed by round shaft extensions for enhanced lateral load resistance and buckling stability.
What are the main advantages of combination helical piles?
They offer rapid installation with immediate load-bearing capacity, minimal site disruption and excavation, versatility across different soil types, superior penetration in dense soils, enhanced lateral load resistance, customizable configurations, reduced concrete usage with lower carbon emissions, and are made from recyclable materials.
How are combination helical piles installed?
Installation uses hydraulic torque motors to drive the piles into the ground with a screwing action, minimizing soil disturbance and allowing immediate load-bearing capacity upon completion.
What types of projects are combination helical piles used for?
They are utilized in residential foundations, commercial buildings, docks, bridges, new construction, foundation repair, underpinning, soil stabilization, and slope retention, performing well in challenging soil conditions.
What are the standard sizes and load capacities available?
Standard sizes include 1.5″ square shaft leads with 2.875″ round extensions, 1.75″ with 3.5″, and 2.25″ with 4.5″. Helix configurations range from 8″ to 14″ diameters, with ultimate load capacities from 68 kips to over 150 kips depending on soil conditions and design specifications.
Can you customize helical piles for specific project requirements?
Yes, our combination helical piles are highly customizable. We can tailor sizes, lengths, helix configurations, and capacities to match unique soil conditions and load demands. Using bolted couplings, we assemble various segments to achieve the desired depth and strength for any application scale.
How do your combination helical piles ensure compliance with industry standards?
Our helical piles meet international standards and undergo rigorous load testing to verify capacity. They are manufactured with high-quality galvanized steel and have passed SGS tests and evaluations by authoritative research institutes. Our strict quality control includes raw material selection and multi-stage testing to ensure 100% reliability before shipment.
What technical support do you provide for project planning?
We offer extensive technical support, including training programs and specialized tooling for installation. Our professional engineers assist with soil analysis, product selection, and installation guidance to ensure optimal performance and project success.
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