Main characteristics of concrete screw piles for foundations

Given their strength and adaptability, concrete screw piles are a common option for building foundations. These piles are perfect for a variety of construction projects because they are made to sustain large loads and offer stability. Concrete screw piles can provide a dependable foundation option for any kind of building, be it residential, commercial, or otherwise.

The simplicity of installation for concrete screw piles is one of its main benefits. Screw piles can be installed swiftly and with the least amount of site disturbance, in contrast to traditional foundation techniques that call for substantial excavation and concrete pouring. For many builders and contractors, this makes them an efficient and economical option.

The ability of concrete screw piles to adapt to various soil conditions is another advantage. They work well in a variety of soil conditions, such as rocky ground, sand, and clay. Because of their adaptability, concrete screw piles can be a good foundation option in a variety of geographical areas.

Additionally,

Design

A concrete screw pile has different structural characteristics from a multi-turn geoscrew, despite their external similarity.

Design components:

1. Reinforcement frame, which is the basis of the structure.
2. Pile body consisting of fiber reinforced concrete.
3. Concrete helical blades providing traction with the soil and load-bearing capacity of the pile.
4. Cone-shaped metal tip.
5. Universal top part of the pile with a technological hole that allows the use of various gearboxes for immersing the pillar into the ground.

There are projecting rods used for knitting reinforcement on the top portion of the pile. It is also possible to trim and cover the top of the support with a metal cap.

Technical characteristics

To choose the right amount of reinforced concrete screw supports, you must be aware of the technical features of the load-bearing components for the foundation before making any purchases.

Specifications for one product’s quality:

1. Support length – from 1 to 4 meters.
2. Diameter – 152 mm.
3. Weight – from 30 to 200 kg.
4. Concrete strength grade – from M400 (B30) to M500 (B40).
5. Bearing capacity: from 3.5 tons (in clay), 5 tons (in loam), more than 6 tons (in sand).

Scope

In the construction of private housing, screw reinforced concrete piles are utilized for planned structures like:

• residential, country houses;
• baths, outbuildings, gazebos, fences.

The following technology is applied when building industrial facilities:

• cellular towers;
• power lines;
• hangars and pavilions;
• protective fences and shields;
• warehouses and more.

The ability to use the screw concrete pillar device method permits the use of supporting components for ornate buildings and heavy advertising.

For a pile-grillage foundation, screw supports can also function as the bottom component for slab and monolithic strips.

Advantages and disadvantages

The dependability of high-strength concrete sets apart reinforced concrete piles, which are intricately designed with screw blades and offer all the benefits of conventional metal geoscrews.

Benefits of assistance:

1. Corrosion resistance of concrete.
2. Reinforced frame eliminates deformation or breakage of the structure during installation and operation.
3. Increased load-bearing capacity (up to 50 tons) will withstand construction made of heavy materials.
4. Can be used for most types of soil, except rocky areas, as well as soils containing inclusions of hard mineral rocks.
5. Levels the height of the structure on slopes and areas with complex terrain.
6. The technology does not involve excavation work: there is no need to remove the top layer of soil and compact the surface of the site.
7. Installation can be carried out both in a mechanical and manual way.
8. Construction work can be carried out at any time of the year.
9. Installation speed from one day.
10. Piles can be removed at any time and reused, which also makes the foundation maintainable.
11. Service life from 100 years.

The drawbacks of technology

1. Susceptibility to frost heaving forces. This predetermines the need to conduct geological surveys on the site to assess the soil characteristics in order to choose the correct depth for supports.
2. Difficulties in the construction of underground premises, including basements and ground floors. In practice, it is possible to use the space between the supports, but the work will be accompanied by significant labor and financial costs.
3. Inability to waterproof the foundation.
4. Due to the greater weight, installation of reinforced concrete piles will cost the owner more than metal structures.
5. Concrete piles are difficult to drive into the ground at the same level, so the upper part is usually cut off or built up to the required height.
6. Poor supply on the market for concrete screw supports due to the fact that the technology appeared not so long ago.

The primary benefit of using reinforced concrete piles as opposed to metal ones is that the former is more resistant to the damaging effects of soil moisture.

The manufacturers assert that the hydrophobic additives in the concrete mortar completely prevent destruction. However, in actuality, the consumer won’t be able to confirm the concrete’s water resistance, so the developer must rely on the supplier’s honesty.

The primary drawback of the technology is its incapacity to apply external waterproofing of the foundation to remove hazards.

Stages of production of concrete structures

Screw concrete pile production is a sophisticated technological process requiring specialized equipment.

The following steps make up the process of creating concrete screw piles:

1. Installation of reinforcement cage.
2. Arrangement of reinforcement in rubber formwork, which serves as a form.
3. Filling the formwork with concrete mortar (M400 – 500) with the addition of hydrophobic compounds. The mixture is pressurized. The event is carried out using vibration equipment to eliminate air bubbles from the mixture.
4. Drying the workpiece in the heating chamber for 10 hours. During this time the mixture hardens by 50%.
5. Finishing to a solid consistency in a drying chamber at a certain temperature for 7 days.

average cost

This type of support’s pricing factors include:

• geometry and configuration of the pile;
• quality of concrete and reinforcement used;
• presence of hydrophobic additives in solution.

Rebarred concrete screw piles are slightly more expensive than conventional metal geoscrews, with prices starting at 3,500 rubles. Conversely, hot-dip galvanized steel poles are more expensive than concrete products due to the lack of corrosion protection.

In terms of service life, reinforced concrete structures outlast supports coated with other types of protective coating.

Professionals advise against economizing on inexpensive supports in order to reduce the possibility of an early foundation failure. In an attempt to cut costs, dishonest producers might utilize too thin reinforcement or inferior concrete grades, in addition to disregarding technological advancements.

For building foundations, concrete screw piles are a dependable and effective option because they provide excellent stability and load-bearing capacity. They are a flexible option for many construction projects because they are simple to install, which cuts down on labor costs and construction time, and they work with different types of soil. They are a popular option for both residential and commercial buildings because of their long-lasting performance and resilience to environmental factors.

Useful video

Further details regarding the subject matter of the article in the video:

For many different types of construction projects, concrete screw piles provide a sturdy and dependable foundation option. Builders and engineers favor them because of their primary qualities, which include their high load-bearing capacity, simplicity of installation, and suitability for a variety of soil types. These piles guarantee the longevity and durability of the structures they support by offering a solid and stable foundation.

Concrete screw piles are simple and effective to install, which cuts down on construction time and labor expenses. Screw piles are an environmentally friendly option because they disrupt the environment less than traditional foundation methods do. Because of their adaptability to various building conditions and requirements, they can be used in both residential and commercial projects.

Concrete screw piles have many practical uses, but they also save money in the long run. Because of their durability, there is less need for regular upkeep and repairs, which results in lower overall costs. Thus, they symbolize a sound.

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