Underpinning Systems

Commercial push pier underpinning, pipeline stabilization and helical deck support piering in Nebraska, Kansas, Iowa and Missouri

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Foundation underpinning services

The Supportworks Push Pier System utilizes high-strength round steel tubes and a load transfer bracket (retrofit foundation repair bracket) to stabilize and/or lift sinking or settling foundations. The foundation bracket is secured against the existing footing and pier sections are driven hydraulically through the foundation bracket and into the soil below using the combined structural weight and any contributory soil load as resistance. Pier sections are continuously driven until a suitable load-bearing stratum is encountered. At that point, the structure either begins to lift or the target pressure/load is achieved. The weight of the structure is then transferred from the unstable soil, to the foundation brackets, through the piers, and to firm load-bearing soil or bedrock.

The Supportworks Push Pier System develops a factor of safety against pier settlement by the pier installation methods used and the sequence with which multiple piers are driven and then re-loaded. Piers are first driven individually using the maximum weight of the structure and any contributory soil load. After all of the piers are driven, the piers are re-loaded simultaneously, and the total reaction load is distributed over the multiple pier locations. Since the average load on each pier during the load transfer operation is less than the load during pier installation/driving, a factor of safety against settlement is achieved. Typical factors of safety against pier settlement range from about 1.5 to 3.0, with higher values generally achieved for structures with greater rigidity. These factors of safety conservatively ignore any additional long-term frictional component to the pier’s capacity.

Design Considerations

Push piers are installed directly adjacent to the existing structure utilizing side-load brackets. This introduces eccentricity into the system. The Model 288 Push Pier System incorporates an external sleeve at the top of the pier to aid in resisting the bending forces generated by this loading condition. This helps preserve the axial compressive capacity of the pier shaft. The external sleeve extends through and below the foundation bracket to essentially create a bracket that is 48 inches tall.

The moment or bending force is localized within a relatively short distance below the bracket. 

Although the bending force is dissipated quickly by the pier bearing against the confining soil, it is significant and cannot be ignored. The depth or length of sleeve and pier over which the bending force dissipates is a function of the soil stiffness near the surface. The depth is greater in soft clay and loose sand, and less in stiff clay and dense sand. In soft or loose soils, a small portion of the bending force may be transferred to the pier below the sleeve, thereby reducing the pier’s allowable axial compressive capacity. A modified, lower capacity system is also available with a shorter, 30-inch long sleeve for low headroom applications.

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Friction reducing collar

The first pier section advanced into the ground includes a larger-diameter “friction reducing collar” welded to the lead end. This collar, being larger in diameter than the pier tube, effectively creates annular space around the pier as it is advanced through most clayey soils. In soft clay or clean sand and gravel, an annular space may only temporarily be created. However, the larger diameter collar causes soil disturbance or remolding to occur, which also significantly reduces frictional resistance on the outside surface of the pier during driving. The result is a driven pier that generates most of its capacity in end bearing. Over time, the soils surrounding the pier relax back into the annular space and against the pier shaft. This provides an additional frictional component to the pier’s capacity. Even though this frictional capacity may be significant, it is conservatively ignored in the determination of the pier’s factor of safety against pier settlement.

To find out more, contact Thrasher Commercial at 1 (800) 827-0702.

Pipeline support systems

Supportworks manufactures a variety of helical foundation systems that are used to solve pipeline support issues in various applications. Our helical anchor products offer high capacity solutions at an extremely competitive cost.

Helical piles and anchors are an excellent solution that can overcome a variety of terrain challenges, including buoyancy control, span rectification and storm current protection.

No matter how demanding your terrain issues are, you can rest assured that your pipeline is secure and stable.

Common applications:

  • Pipeline stabilization
  • Span rectification
  • Storm current and scour protection
  • Pipelines to be inundated
  • Marshes, flood plains, wetlands
  • HDPE pipelines
  • Bulkheads and tie-back anchors

 

Using our hydraulically installed helical screw piles, your pipeline will remain level and capable of transporting maximum capacity no matter what the ground conditions are. No longer will you have to worry about stress loads causing your pipeline to sag or sway because of shifting terrain, or the effects of external elements such as flood currents or rising and falling ground. Helical piles install quickly and can be load tested to ensure they will carry the necessary loads.

Supportworks has worked for some of the largest companies in the world. Our screw piles and anchor systems are safe, reliable and secure in all environments.

Don’t trust a system that is inadequate and outdated. Let innovation provide you with stabilization.

Supportworks helical pipeline supports cost less and are able to provide higher capacities than traditional systems of concrete coating or concrete weights.

Because we use materials that are cost effective and install quickly, our systems can save thousands of dollars over more traditional pipeline support systems.

Supportworks pipeline support systems give you the ability to achieve affordability, deliverability, and proven performance.

To find out more, contact Thrasher Commercial at 1 (800) 827-0702.

Helical deck support piers in Nebraska, Kansas, Iowa and Missouri

Helical piers make a strong, fast foundation for decks, sunrooms and other small structures

 

The standard practice of installing poured concrete piers for decks, porches, sunrooms and similar structures has caused plenty of frustration over the years.

Holes can’t be dug and piers can’t be poured in rainy or freezing weather. Post base hardware must be carefully placed in the top of the pier while the concrete is still wet. Construction is delayed while the concrete hardens.

Worst of all, when a concrete pier is mistakenly installed off the layout grid, you’ve wasted a significant amount of time and money.

Steel helical deck piers eliminate all the frustrations mentioned above. Designed to accept standard steel support brackets for 4×4 or 6×6 posts, these specialized piers do away with weather delays because they can be installed regardless of temperature and precipitation conditions. No excavation is required, and no concrete either.

At Thrasher Commercial, we’re here to fix your foundation problem. We’ll introduce you to one of our foundation specialists, who can answer any questions you have and explain how we can permanently restore value and structural stability to your home.

We’re proud to serve Omaha, Sioux City, Lincoln, nearby localities such as Grand Island, Kearney and the surrounding areas.

Common applications of this time-saving structural system include the following:

  • Decks
  • Sunrooms
  • Porches
  • Pavillions
  • Sheds
  • Storage buildings
  • Cottages
  • Mobile homes
  • Elevated walkways

Bad weather and poor soil conditions won't hamper pier installation

Helical deck piers take advantage of proven structural engineering technology used for years to repair damaged foundations and overcome problems caused by weak and unstable soil conditions.

The helical-shaped plates on the shank of a helical pier are engineered so that the pier can be turned into the ground like a giant screw. Rotational resistance is measured as the pier is installed to ensure that the pier is solidly anchored in the soil.

Weak or unstable soil close to the surface isn’t a problem because piers can be driven to reach strong, stable soil at greater depths. A skid steer or other compact hydraulic machinery can handle the installation.

No Excavation, No Mess and No Waiting

Builders who learn about helical deck piers soon become fans of this construction method. No digging is required, and if a pier is installed in the wrong location, it can simply be “unscrewed” and reinstalled. The need for concrete is eliminated, and there’s no construction delay. Wood posts can be installed atop piers as soon as the piers are in place. Thanks to a factory-applied corrosion-resistant coating, these piers are manufactured to last.

Helical Deck Pier Installation

Contact Thrasher Commercial today to schedule a consultation for your next deck or small structure project. Find out how helical deck piers can streamline your construction process.

We’re proud to serve Omaha, Lincoln, Sioux City, nearby localities such as Council Bluffs, Bellevue, Grand Island, Kearney, Norfolk, Fremont, North Platte, and the surrounding areas.