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Cracked Foundation Repair with Steel Push Piers

clock January 16, 2012 04:19 by author
Steel Push Piers are the most popular form of foundation repair for settling homes. When installed by trained foundation repair contractors steel push piers will provide years of structural support.

Foundation Repair using Steel Push Piers

Foundation repair, steel push piers

One of the advantages of using push piers (resistance piers) for foundation repair is that they use quiet vibration free hydraulic equipment to  install the steel resistance piers. All of the installation equipment is highly portable and can be easily transported on the jobsite. After all of the steel push piers are installed and load tested, the structure can be immediately restored or lifted by transferring the load of the home to the piers. There's no time wasted, waiting for concrete to cure, and no soil to remove from the site. A measured factor of safety is verified, as the piers are 100% load tested to a force greater than the actual working load. This all means that you will get verified structural support for many years when you require steel push piers to be used on your home’s foundation.

Remember to always consult with an independent professional engineer before starting any structural foundation repairs and these repairs should only be performed by trained foundation repair contractors.

Steel Push Piers Installation

Below, the following steps the typical installation procedure for the largest selling Steel Push Piers:

1. Site survey: Pier placements are located around the structure and the location of underground utilities verified.

2. steel push piersExcavation: Small excavations or the entire perimeter is dug for access at each placement location. The space required at the foundation is usually about 3 feet square.

3. Prep of the foundation: This includes notching the concrete footing to place the push pier bracket under the stem wall, preparing the bearing area under the footing to a smooth and level condition, and adjusting the face of the stem wall to vertical at the point of bracket attachment.

4. Bracket Attachment: The steel resistance pier bracket is secured to the footing using anchor bolts. Attachment of the drive stand and the hydraulic cylinder that is used to force the pier pipe into the soil is mounted on the drive stand.

5. Push Pier Pipe Installation: The steel pier pipe is advanced into the soil using the structure as the reaction force with a 10,000 psi hydraulic pump and cylinder combination. The piers may be installed from outside or inside the structure. Pier installation continues until rock or suitable bearing-strata is encountered below the unstable soil near the surface.

6. Load Test: Every resistance pier is load tested by increasing the force on the pier to insure the rock or bearing-strata will support a load greater than needed to guarantee a factor of safety. Typically an engineer will determine the load of the structure and the desired factor of safety before the load tests are performed.

7. cracked foundation repairPreps for Restoration: Once all push piers have been installed, load tested, and the installation data at each placement recorded; lifting head assemblies and hydraulic lifting rams are placed on the steel piers. The lifting cylinders are connected with one or more manifolds and operated using a hydraulic pump.

8. Restoration: Under careful supervision, the load is transferred from the existing failing strata under the foundation, to the load tested piers. The structure can be transferred gently and evenly lifted to as close to the original elevation or to the recommendation of the engineer. The nuts at the pier caps are secured at each placement and the lifting equipment is removed.

9. Clean Up: The soil that was excavated at each steel push pier placement is now replaced and compacted. The site is left clean and neat.

Foundation Repair Solutions

If you have noticed cracks in your drywall, brick or foundation you might need steel push piers to provide structural support foundation repairs. Whether your foundation is concrete block, poured concrete or composed of stone, steel push piers should be your first choice as a foundation repair solution. Foundation repair or structural underpinning projects, with steel push piers, are usually completed in just days, not weeks.



Major Foundation Repair Issues in Atlanta

clock July 7, 2011 19:41 by author blogadmin
ECP helical piers were used to make major foundation repairs for a home suffering from foundation issues.

http://www.youtube.com/embed/68V6JYHYPuA

 

This is a video link to a job that Atlas Piers of Atlanta has been called in to solve.  The current homeowner bought the house after helical piers were installed poorly to fix a foundation problem over a debris pit (buried wood debris under the foundation). The helical piers were installed but did not penetrate the debris. Atlas Piers of Atlanta installed 3 resistance piers (or push piers) a few years later on another area of the house. Since the original helical piers failed due to poor installation (the company has since gone out of business, but started another piering company), Atlas Piers of Atlanta is now repairing the area above the debris pit with resistance piers manufactured by Earth Contact Products.



Foundation Issues Job in Boston

clock June 23, 2011 07:31 by author blogadmin
Helical piers are used for a limited access foundation project in Boston by Atlas Systems of New England.

Local Contractor looks to Atlas System of New England for Foundation Support

A local Chinatown contractor wanted to build a 5-story addition to an existing structure but was stymied by foundation issues: how to support a 5-story building with the difficult soil conditions often found in the Boston area; with these soil types it was apparent that a deep foundation system was needed but which type and the footprint of the new addition is located within a walled area several building lots from the closest cross street and highly inaccessible. Because restricted site accessibility, poor soil conditions, and the need for a deep foundation system, there was only one possible solution. The solution involves utilizing Atlas Systems of New England to install a helical pier foundation support system specifically designed for the client.

Foundation Repair Solution

helical piersBy installing helical pier foundation solutions, your foundation becomes stable and secure with little to no disturbance to the worksite. Helical piers is a structural piering devices for residential and commercial foundation applications in use today. When installed deep into stable soil they can be used to lift homes, stabilize foundations, elevate walkways, and retain walls.

The process to design a proper deep foundation support system for this project was dependent on the following:

    • Having a series of soil borings taken on-site to determine actual soil classification, location and depths of soil strata, and soil bearing capacities.

    • Having a geotechnical/structural engineer review the soils to determine what type of deep foundation system is best suited for the project.

    • Develop a foundation plan showing pile design, pile locations, and depths of installation.

    • Keeping accurate pier installation logs that record depths of piers and installation torques.

Atlas Systems of New England was subcontracted by the contractor (CC Brothers of Chinatown) to provide the deep foundation helical pier support system for this project. Our team of professionals offer the best foundation repair solutions to fix any situation. The Structural Engineer for this project hired by the owner was:

Mark Liao, P.E. Liao Associates, Inc. 625 Bedford St. E. Bridgewater, MA 02333

For additional information on this project please contact: 
Dennis P. Geisser at Atlas Systems of New England. Call 800-688-9774 and visit us at www.atlassystemsnewengland.com.



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