Qingdao KXD Steel Structure Co., Ltd
Qingdao KXD Steel Structure Co., Ltd
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| 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 new type of foundation building material, mainly used to replace the traditional reinforced concrete pouring construction process.
1.Structure and Composition
Screw piles typically consist of the following components:
Pipe body: Generally made of high-strength steel, it is the main part of the pile.
Spiral blades: Welded to the surface of the pipe body, they increase the contact area with the soil, provide friction and support.
Connecting flange: Used to connect loads or other structural components, facilitating installation and fixation.
Anti-corrosion coating: Usually treated with hot-dip galvanizing or other anti-corrosion methods to enhance corrosion resistance and service life.
2.Working Principle
The working principle of helical piles is similar to that of wood screws. Through a dedicated tightening device, the pile is screwed into the ground in a spiral manner. The helical blades come into contact with the soil and generate friction, providing stable support for the upper structure. They have strong tensile resistance and insertion grip, effectively distributing pressure and reducing the risk of settlement.
Advantages
Spiral ground anchors have the following significant advantages:
Easy construction: No need to dig or damage the ground surface. They can be directly screwed into the ground, with a short construction period and little environmental impact.
Good environmental friendliness: No construction waste is produced during the construction process, and the soil structure is not damaged, making it environmentally friendly.
Low cost: Compared with traditional concrete foundations, it saves processes such as formwork erection, pouring, and curing, significantly reducing material and labor costs.
All-weather construction: Construction can be carried out under various weather conditions, such as rain, snow, and freezing.
Recyclability: They can be reversed and pulled out after use, facilitating relocation and reuse.
Application scenarios
Spiral ground piles are widely used in the following fields:
Construction field: for foundation replacement, retaining walls, mobile houses, etc.
Photovoltaic power stations: to fix photovoltaic brackets and support systems. Due to their fast construction and environmental protection features, they have become the preferred foundation for photovoltaic projects.
Wind power projects: to provide support for the foundations of wind turbines.
Other scenarios: such as garden fences, solar carports, agricultural greenhouses, etc.
Notes to be observed
Before using helical piles, static load tests should be conducted based on geological conditions to ensure their bearing capacity meets the design requirements. The installation accuracy is highly demanding, usually needing to be controlled within 1.5 centimeters. Special attention should be paid to the anti-corrosion performance of helical piles, especially during long-term use, to ensure the durability of their anti-corrosion coating.
Product Parameters
As factory - manufacturer, we are able to produce various types of lead sections for the pile or anchors shaft and varied size of helical steel plates, which means the steel grade, length, thickness, diameter of the pile shaft and number of helices, their diameter, pitch angle, steel plate thickness, position on the pile shaft can be customized according to customers' drawing or sample.
There are solid square shaft helical piles and hollow round shaft piles available. They both work well upon choosing the suitable type according to project ground conditions. The shaft consists of helices, number of which is customizable according to soil conditions. When project need combination of square shaft and round shaft, bolted coupling will join these segments which also within our manufacturing capability.
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.
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
Adequate inventory.
Strong strength, integrating research and development, production, processing, and export.
Annual production:500,000 pieces
Perfect testing management system.
Multiple testing equipment is strictly included, including steel quality grade, welding quality, galvanizing quality, actual trial test, and other links for strict testing. Ensure that all links are safe and reliable.
Strong after-sales service system.
The ultra-long shelf life reaches 10 years, and there is a professional after-sales team to deal with problems on time, and deliver on time.
If you are interested in our Round Spiral Ground Anchors,please feel free to contact with us,we are happy to serve you.