Qingdao KXD Steel Structure Co., Ltd
Qingdao KXD Steel Structure Co., Ltd
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Superior Corrosion Resistant Screw Piers Reliable Helical Screw Pile Producer Galvanized Helical Piles for Foundation System
| Steel Type | Q355/Q255 | Surface Treatment | Hot DIP Galvanizing with an Average of Over 80 μm |
| Transport Package | Pallet and Carton | Usage | Construction Engineering,Fixed Orchards And Greenhouses,Billboards And Street Lamp Foundations |
| Certification | API, ISO, CB, CE, SGS, BV | HS Code | 730110 |
| Pipe Diameter | Customizable(48~219mm) | Trademark | KXD STEEL STRUCTURE |
| Plate Diameter | Customizable(150~600mm) | Production Capacity | 50000 PCS/Month |
| Pile Length | Optional(1m~6m) | Origin | Qingdao,China |
| Shaft Wall Thickness | 3mm~12mm | Blade Thickness | 6mm~16mm |
| Helix Number | 1~4 Blades | Connecting | Flange Plate,Sleeve,Welding |
Product Description
Spiral ground piles are a type of foundation support structure that is implanted underground through the rotation of spiral blades and are widely used in fields such as construction, power, communication, and solar energy.
Structure and Composition
Central axis: Usually a high-strength steel rod body, it bears the main load.
Helical blades: Helical steel sheets welded to the shaft, with a quantity ranging from 1 to 4 pieces. The diameter is designed according to requirements (ranging from a few centimeters to over 1 meter).
Connection components: The top can be adapted to different devices (such as flange plates, U-shaped cards, etc.), facilitating connection with the superstructure.
Core advantages
Quick installation: The installation of a single pile only takes a few minutes to half an hour, requires no maintenance, and can bear weight immediately.
Environmentally friendly and low interference: No excavation, less earthwork, low noise, suitable for sensitive areas (such as ecological protection zones, urban areas).
Strong adaptability: It can be used from soft clay to dense sandy soil, and even applied on slopes or underwater.
Detachable and reusable: It can be pulled out and reused after temporary projects (such as mobile houses and concert stages).
Typical application scenarios
New energy: Photovoltaic support foundation (to avoid damaging farmland), temporary foundation for wind power generation.
Building reinforcement: Foundation strengthening when elevators are added to existing buildings and basements are expanded.
Municipal engineering: Rapid installation of street lamps, traffic signs and sound barriers.
Emergency disaster relief: Rapid construction of the foundations for temporary Bridges and prefabricated houses.
Comparison with other foundation forms
| Types | Spiral ground piles | Concrete cast-in-place piles | Prefabricated piles |
| Construction speed | Extremely fast(Completed on the same day) | Snow(It requires 28 days of curing) | Medium(Pile driving equipment is needeed) |
| Environmental impact | Extremely small(No mud pollution) | Big(Excavation,a large amount of waste) | Medium(The noise and vibration are large) |
| Cost | Low cost(Labor and equipment savings) | Relatively high(Long materials and construction period) | Medium |
| Geological limitations | Avoid rock layers and huge rocks | Almost unlimited | Hard soil layers are difficult to penetrate |
Precautions
Geological exploration: It is necessary to detect underground obstacles (such as rocks and pipelines) in advance to prevent blade damage.
Anti-corrosion treatment: In damp or corrosive soil, galvanized or epoxy coatings should be applied to extend the service life.
Load verification: After installation, a static load test must be conducted to ensure that the bearing capacity meets the standards.
Due to its high efficiency and environmental friendliness, spiral ground piles have become the preferred alternative to traditional foundations in modern engineering, especially suitable for projects with tight schedules or high environmental requirements.
Types Of Spiral Ground Piles
The type of spiral pile is rich, and here are some common categories:
One.Classification by leaf layout
1.Single blade spiral pile: only a spiral blade shaped like a large screw. This kind of land pile is convenient when it is transferred to the soil, and the construction speed is fast. It is suitable for some small projects and temporary facilities, such as small photovoltaic support and simple tent, etc.
2.Double blade spiral pile: there are two spiral blades, and there is a certain spacing between the two blades. The double blade design increases the contact area with the soil, and the bearing capacity and the resistance of the bearing capacity and drawing resistance are improved compared with that of the single-blade sheet spiral pile, which is often used for the foundation support of photovoltaic power station, small wind turbine and other equipment.
3.Multi-blade spiral pile: helical blade with three or more helical blades with relatively small spacing. Multi-blade spiral pile can provide greater bearing capacity and stability, and can meet the application requirements of heavier duty, such as the foundation support of large photovoltaic power station and communication tower, which is widely used in some situations with complex geological conditions and higher bearing capacity requirements.
4.Continuous blade type spiral ground pile: the blade is continuously wound on the central steel shaft to form a spiral rising continuous structure. The large contact area between the blade of this land pile and the soil mass can provide strong lateral friction resistance and tensile force, which is suitable for various complex geological conditions, especially in the soft land area and the engineering that requires higher bearing capacity, such as large outdoor billboards and auxiliary support of Bridges, etc.
Two.Classification by connection
1.Flanged screw pile: top with a flange and connected to the superstructure through a flange. Flange connection has the advantages of high strength, good stability, convenient installation and disassembly, can adapt to certain displacement and deformation, can withstand large load, widely used in light photovoltaic power station, fruit and vegetable shed, wooden house villa and other infrastructure scenes.
2.Nut connection screw pile: connected to upper parts by nuts and bolts. Its structure is simple, the production process is relatively simple, the cost is low, and the upper and lower adjustment is convenient, the upper and lower adjustment range is wide, is often used in the light photovoltaic power station, fence fence, billboard traffic and other infrastructure construction.
3.U-type connected screw pile: u-shaped disk special design structure, can be quickly, tightly and firmly connected with wood column materials. In the early stage, the design and production is standardized and standardized, which can improve the efficiency and quality of construction and installation, and is used in wooden structure such as wooden villas, wooden plank roads and advertising signs.
Three.Use classification
1.Photovoltaic bracket spiral ground pile: specially designed for photovoltaic bracket, used to support solar panels. Its specifications and bearing capacity are customized according to the weight, size and installation mode of photovoltaic battery components, and have good corrosion resistance and long service life, so as to meet different environmental conditions and long-term use needs of outdoor use, and ensure the stability and reliability of photovoltaic bracket system.
2.Spiral ground pile of wind turbine: used for the foundation of wind turbine, it needs to bear large wind load and equipment weight. Generally, it has large size and high strength. Considering the special stress of wind turbine, the design of spiral ground pile will also be optimized accordingly, such as increasing the diameter and quantity of blades and increasing the stiffness of pile body, so as to meet the stable operation requirements of wind turbine under various working conditions.
3.Temporary facilities spiral ground pile: support of temporary facilities used for construction sites, tents of campsites, tents of music festivals and other temporary facilities. This kind of spiral pile pays attention to the convenience of installation and disassembly, the general size is relatively small, easy to carry and transport, can be quickly fixed to the ground, provides a solid foundation for temporary facilities, and can be easily pulled out and reused after use.
4.Spiral ground pile of traffic facilities: as the supporting foundation of guardrail and sign in traffic facilities such as roads and railways, it is necessary to have good impact resistance and durability to withstand the collision of vehicles and long-term outdoor environment erosion, and ensure traffic safety.
5.Landscape spiral pile: used for the support of outdoor seats, lampposts, flower frames and other landscape facilities in garden landscape design, in addition to satisfying the basic bearing function, it will also coordinate with the surrounding landscape in exterior design, play a certain decorative role, and add beauty to the garden landscape.
Four.Material classification
1.Carbon steel spiral pile: relatively low cost, good mechanical performance, can be used to improve its corrosion resistance by hot dip galvanizing and other surface treatment methods, is one of the widely used spiral ground pile materials, in photovoltaic support foundation, temporary facilities construction and other aspects.
2.Stainless steel spiral pile: it has excellent corrosion resistance and corrosion resistance, can be used in harsh environmental conditions for a long time, such as Marine environment, chemical plant area and other corrosive sites, but its price is relatively high, generally used for corrosion resistance engineering.
3.Aluminum alloy spiral pile: light weight, high strength, good corrosion resistance, and good processing performance and decoration effect. In some places with high aesthetic requirements, such as garden landscape facilities and outdoor facilities of high-end residential, aluminum alloy spiral pile has become a good choice, but its cost is also high.
Five.According to pile structure classification
1.Solid spiral pile: pile is solid structure, with high strength and stiffness, can withstand large load, suitable for engineering with high bearing capacity requirements, but relatively large weight, transport and construction may require more mechanical assistance.
2.Hollow screw pile: pile body is a hollow structure, on the premise of ensuring certain strength and stiffness, can reduce their own weight, facilitate transportation and construction, and at the same time can meet the bearing capacity requirements of general engineering, is a common spiral pile form.
Product Parameters
Spiral ground piles are a modern foundation treatment technology that is efficient, economical and environmentally friendly. They provide stable bearing capacity through the mechanical combination of steel spiral structures and soil. Its modular design and rapid construction characteristics give it irreplaceable advantages in new energy, building reinforcement and temporary engineering, and it is an important supplement and development direction of traditional pile foundation technology.
The parameter selection of spiral ground piles should be combined with engineering requirements, geological conditions and budget, and the shaft diameter, blade size and material should be reasonably matched. Its modular design gives it obvious advantages in terms of load-bearing capacity, construction efficiency and environmental protection, and it is suitable for a variety of scenarios ranging from temporary facilities to permanent buildings.
| Basic Structural Parameters | ||
| Parameter Item | Common Specifications | Remarks |
| Material | Q235/Q355 Carbon Steel,Galvanized Steel,Stainless Steel | Carbon steel is mostly used in general engineering, while galvanized or stainless steel is used in corrosive environments |
| Central Axis Diameter | 48mm-219mm | The larger the shaft diameter is, the stronger the bending and compressive resistance will be. |
| Shaft Wall Thickness | 3mm-12mm | The larger the shaft diameter is, the stronger the bending and compressive resistance will be |
| Helix Number | 1-4 Blades | Multi-blade is suitable for high load-bearing capacity or uplift resistance requirements |
| Blade Diameter | 150mm-600mm | The larger the blade, the higher the load-bearing capacity |
| Blade Thickness | 6mm-16mm | Thick leaves are suitable for hard soil layers or rock geology |
| The Pile length(A Single Section) | 1m-6mm(Segmented Connection Available) | It can be connected in multiple sections and the maximum depth can reach 30 meters |
| Connecting Method | Flange Plate,Sleeve,Welding | The flange plate is easy to disassemble and the welding is more stable |
| Mechanical Performance Parameters | ||
| Parameters | Typical Range | Description |
| Compressive bearing capacity | 5kN-500kN | It depends on the leaf size, burial depth and soil quality. |
| Uplift bearing capacity | 3kN-300kN | The multi-blade design can enhance the uplift resistance. |
| Lateral force resistance | 2kN-100kN | It can be strengthened by oblique driving or increasing the pile diameter. |
| Installation torque | 1kN·m-50kN·m | Torque is positively correlated with bearing capacity (empirical formula: bearing capacity ≈ torque *10) |
| Construction Parameter | ||
| Parameters | Typical data | Description |
| Installation equipment | Small excavator (with hydraulic head), handheld spiral pile driver. | The equipment is lightweight and suitable for narrow places. |
| Installation Speed | 30 minutes per piece. | It is 3 to 5 times faster than traditional pile foundations. |
| Applicable soil types | Clay, sandy soil, silt, frozen soil, backfill soil. | Hard rock layers require special blade designs. |
| Maximum installation depth | It can reach over 30 meters. | Multi-section connection, with flexible depth adjustment. |
| Environmental adaptability parameters | |
| Parameters | Description |
| Corrosion resistanceseismic performance | The galvanized layer (≥80μm) or epoxy coating can have a service life of up to 50 years. |
| applicable temperature | The temperature range is + -40℃ to 60℃ (special steel can adapt to extremely cold or high temperatures). |
| seismic performance | The steel has good flexibility and is suitable for the spiral design in earthquake-prone areas to reduce the impact of frozen soil. |
| frost heave resistance | It is applicable to northern regions |
| Common model examples(references) | ||||
| Model | Shaft Diameter(mm) | Blade Diameter(mm) | Single pile bearing capacity(kN) | Applicable scenarios |
| HZ-76 | 76 | 200 | 50-100 | Photovoltaic brackets, fences. |
| HZ-114 | 114 | 300 | 100-200 | Lightweight buildings, billboards. |
| HZ-168 | 168 | 450 | 200-400 | House foundation, wind power foundation. |
| HZ-219 | 219 | 600 | 400-800 | Heavy construction, bridge reinforcement. |
The processing method and manufacturing process of helical piles
Material selection
Raw materials: Q235 welded pipes are usually selected as the main raw materials for the production of spiral ground piles, which have excellent welding performance and mechanical properties.
Processing steps
1. Cutting: According to the design requirements, the raw materials are cut to the required length. During the cutting process, it is necessary to ensure that the cut is smooth to facilitate the subsequent deformation and welding processes.
2. Deformation: The cut pipes are subjected to a reduction process to achieve the designed outer diameter, preparing for the subsequent welding process.
3. Welding: The spiral blades, connecting flange plates, and other components are welded onto the pipe body. This is one of the key processes in the production of spiral ground piles. The welding quality directly affects the strength and service life of the ground piles. It is necessary to strictly control the welding process parameters, such as welding current, voltage, and speed, to ensure that the welds are full and free from defects such as false welding, missed welding, and sand holes.
4. Pickling: The welded ground piles are placed in a pickling tank, where they are treated with acid to remove rust, oxide scale, and other impurities from the surface, providing a good surface condition for hot-dip galvanizing. The pickling time and acid concentration must be strictly controlled to avoid excessive corrosion or incomplete cleaning.
5. Hot-dip Galvanizing: The pickled ground piles are immersed in molten zinc to form a uniform zinc coating on the surface, enhancing the corrosion resistance of the ground piles. During hot-dip galvanizing, the temperature of the zinc bath and the immersion time must be strictly controlled to ensure that the zinc coating thickness and adhesion meet the standard requirements.
Follow-up processing
After the above main process steps, some subsequent treatments are still needed for the helical ground piles, such as cleaning, drying, surface inspection, etc., to ensure that the product quality meets the factory requirements. Finally, the qualified helical ground piles are packaged and stored in the warehouse for transportation and sale.
Working Principle
Installation method: By rotating and pressing down through a hydraulic or mechanical torque motor, the helical blades drill into the soil layer like "screws", generating almost no vibration during the process.
Bearing capacity: Relying on the frictional force between the blade and the soil layer and the end bearing force, the depth is adjustable to avoid weak layers and reach stable strata directly.
Spiral ground piles are a type of foundation building material, featuring convenient construction, environmental friendliness, and recyclability. The following is their working principle and usage method:
Working Principle
Frictional Force: When the helical pile is screwed into the ground by specialized equipment, its helical blades come into contact with the soil and generate frictional force. This frictional force can fix the pile in the soil, thereby providing stable support.
Soil Shear Resistance: As the helical pile is screwed into the soil, shear resistance is generated between the blades and soil particles, which further enhances the stability of the pile.
Lateral Frictional Resistance: During the rotation of the helical pile, its blades gradually penetrate and compact the surrounding soil, thereby increasing lateral frictional resistance and improving the overall load-bearing capacity.
Pull-out Resistance: The top bolt plate of the helical pile can withstand pressure or load from above, while the helical blades resist upward pull through friction with the soil, ensuring that the pile is not pulled out.
Usage Method
Preparatory work: This includes geological survey, material preparation, construction equipment preparation, and site clearance, etc. It is necessary to understand the geological conditions, soil properties, and groundwater level, etc., prepare the required helical ground piles and related accessories, and ensure that the construction equipment is in good condition.
Installation of equipment: Connect the output shaft of the helical ground pile machine with the square socket of the helical ground pile to ensure that the pile remains vertical to the ground.
Insertion of the pile: Start the equipment to insert the pile into the ground. During the construction process, maintain a uniform rotation speed to avoid damaging the pile body.
Installation of the pile head: When the pile reaches the set depth, stop the equipment and lock the mechanical arm. Remove the helical pile head and replace it with a straight pile head of the required length, and insert it into the top of the helical pile to ensure a tight connection between the pile head and the pile body.
Application of pressure: Apply pressure through the helical pile machine to smoothly insert the helical ground pile into the ground until it reaches the designed depth and bearing capacity.
Post-construction treatment: After the installation is completed, conduct quality checks to ensure that the verticality and levelness of the ground piles meet the requirements, and also check whether all connection parts are firm and reliable.
Company Profile
Qingdao KXD Steel Structure Co.,Ltd is one subsidiary for XINGUANGZHENG Group focusing on structural steel building construction related business, engineering,supply, fabrication, delivery and installation for whole buildings construction, meanwhile, we also do steel foundation accessories fabrication, foundation anchor, ground screws,helical pile.
Our Advantages
✅ Quality product: Made of high strength steel (Q235B/Q355B), with anti-corrosion galvanized or epoxy coating to ensure durability and corrosion resistance, suitable for various complex geological conditions.
✅ Customized services: We offer a variety of specifications (shaft diameter 48mm - 219mm, blade diameter 150mm - 600mm), and support customization according to engineering requirements to meet different bearing capacity requirements.
✅ Fast delivery: Factory direct supply, sufficient inventory, shortened procurement cycle, guaranteed project progress.
✅ Technical support: Professional team provides selection guidance, construction plan optimization and on-site installation support to ensure project quality.
✅ Cost advantage: helps customers save 20% to 40% of the combined cost compared with traditional pile foundation and improve project efficiency.
If you are interested in our products,please feel free to contact with us,we are glad to serve you.