Round Shaft Helical Anchor
Round shaft helical anchors are used in construction as anchors for the foundation to provide extra support and strength. In cases where the foundation is not secure due to poor soil conditions, the round shaft helicals can be used to increase the strength and stability of the structure by increasing the stability of the foundation.
Adding round shaped anchors to the foundation offers a cost effective solution to poor soil conditions that impair the stability of the foundation. The anchors increase the load bearing weight of the foundation by spreading out compression forces into the ground and preventing soil movement.
The design of the round shaft anchors is similar to a corkscrew in that helical blades are attached to a round shaft. The helices or blades enable the anchors to be screwed into the ground with ease creating extra support for the foundation. Once in the ground, the round shaft helical anchors increase resistance to soil movement and improve the load bearing capacity of the foundation.
For constructions on poor ground conditions, round shaped anchors are a cost effective solution that offers easy installation and minimal labor costs. They also cause minimal disturbances to the soil and can be used to repair old foundations that are showing signs of damage.
Round Shaft Helical Anchor Drawing
| Series | Plate Diameter-inches | Plate Area sq. ft. | Length | ||||
| “A” | “B” | “C” | |||||
| RHA84 | 10 | 12 | 14 | 2.07 | 84″ | ||
| RHA120 | 10* | 12* | 14* | 2.07 | 120″ | ||
Main Applications of Round Shaft Helicals
In constructions with high lateral loads, the stability of the foundation can be affected. In such cases use of round shaft helical anchors is an excellent way to reinforce the foundation and increase its stability.
Some common use cases of round shaped helicals include: :
- New foundations: for constructions done on loose soils or other poor soil conditions, round shaft helicals can be used to increase the lateral load bearing capacity of the foundation and provide more stability.
- Repair of damaged foundations: sagging, cracking or damaged foundations can be reinforced with helicals to help in increasing stability and durability of the foundation.
- Towers: since round shape helicals are ideal for increasing lateral load bearing capacity they are ideal for use in the construction of different types of towers including observation towers, power distribution towers and more.
- Industrial constructions: Due to their ease of installation even in areas with limited access or mobility, round shape helicals are ideal for industrial constructions like silos, power infrastructure and material handling plants.
Benefits of Round Shape Helical Anchors
- Hydraulic equipment can be used to screw them into the ground with limited damage to the ground making installation easy and minimizing costs.
- They are ideal for structures with high lateral loads since they are designed to offer enhanced lateral stability. When downward forces are exerted on the structure the helicals prevent soil movement, reinforcing the stability of the foundation.
- Round shaped helical anchors work for various soil conditions and are therefore suitable for installation in any weather condition or season.
- They can be installed below active soils since they cause minimal soil disturbance during installation.
- Round shaped helicals are not impacted by a high water table.
- They cause little to no vibration and provide immediate load transfer upon installation
- They can be easily load tested after installation to verify their capacity.
- Round shaped helical anchors can be installed under existing structures and in very limited access locations.
- The round shape helicals can be filled with grout to boost reliability and durability.
Round Shape Vs Square Shape Helical Anchors
Helical anchors come in both round and square shape varieties. The main difference between the round shape helicals and square-shaped is in the structure of the helical. While round shaped helicals have helices welded to a tubular or cylindrical shaft the square shaped helicals have a square shaft.
The difference in design makes the round shaft helicals more ideal for applications where there are more compression forces or lateral loads. Square shaped helicals typically have more capacity-to-torque ratio and are ideal for applications with high tension forces.
Frequently Asked Questions
Where are round shaped helical anchors used?
Round shape anchors are used in constructions where there are weak or poor soil conditions and extra stability is needed to generate resistance to soil movement. They are ideal in cases where lateral loads are high.
How do round shaped helical anchors work?
The round shaped helical is typically screwed into the soil then spaced at intervals to spread the load of the structure. This ensures that the foundation can bear the lateral load applied on it. When used to repair damaged foundations, the round shaped anchors are used with brackets that are attached to the foundation bases.
When are round shaped helical anchors more ideal compared to square shaped helicals?
Round shaped anchors are better suited to high lateral loads since they offer more resistance to downward compression forces. They also work well in construction sites with soft soils.