projects

The Boeing Company

Location: Kelly USA, San Antonio, Texas
Structural Engineer: Robert Heckendorn, P.E.
Geotechnical Engineer: Arias & Associates, Inc.
Helix Steel Pier Contractor: South Coast Helix Foundations, Inc.

Project:

Dixie Anchoring System Steel Piers were installed as mooring points (tie-downs) for the C-17 aircraft on three (3) concrete maintenance pads. Nine (9) mooring points were needed for each concrete pad. Twelve (12) inch diameter holes were cored through the eighteen (18) inch thick concrete pads. A Case 580 backhoe with a 10,000 ft-lb hydraulic drive head was used to install the twenty-seven (27) helix steel piers. Each helix steel pier was a 1 ¾" x 1 ¾" rounded corner solid square steel shaft with a double lead section consisting of an 8" and 10" inch diameter bearing plates. The helix steel piers were installed to depths between fifteen (15) and eighteen and a half (18 ½) feet with a measured torque of 10,000 ft-lb, in order, to resist the required 100 kips of uplift force. The final torque was verified by a shear pin indicator. The cored holes were filled with concrete and a chain shackle was bolted to the top of each helix steel pier. A tie-down chain can then be attached between the C-17 aircraft and the helix steel pier during high winds. The project was completed in three (3) days and was estimated to be at least two (2) to three (3) times more cost effective than alternative methods.

Fire Station No. 1, City of Beaumont

Location: Beaumont, Texas
Structural Engineer: Sigma Engineers, Inc., Sina Nejad, P.E.
General Contractor: Eagle-Pro Engineering, Inc.
Helix Steel Pier Contractor: South Coast Helix Foundations, Inc.

Project:

Dixie Anchoring System Steel Piers were installed to stabilize a portion of Fire Station No. 1 that was experiencing differential foundation movement. Five (5) helix steel piers were installed using hand held equipment due to very limited access at three (3) different locations around the building. Each helix steel pier was a 1 ½" x 1 ½" rounded corner solid square steel shaft with a double lead section having a 10", 12" diameter bearing plates followed by a 5' long extension with a 14" diameter bearing plate. The helix steel piers were installed to depths of fifteen (15) and twenty (20) feet. A standard underpinning bracket was attached to the concrete grade beam and to the top of the helix steel pier. The bracket transfers the foundation load to the helix steel piers and stabilizes the structure from future settlement. The helix steel piers were installed to the required torques and depths which allows 20 to 23 kips of vertical load to be supported at each pier.

Huebner Commons Retaining Wall

Location: San Antonio, Texas
Structural Engineer: Beicker Martinez Engineering, Roger Martinez, P.E.
General Contractor: Carlile General Contractors
Helix Steel Pier Contractor: South Coast Helix Foundations, Inc.

Project:

Dixie Anchoring System Steel Piers were installed as tie-backs for a newly built CMU retaining wall that was already experiencing lateral movement and cracking. The length of the retaining wall to be repaired was approximately 115 feet. South Coast Helix Foundations, Inc. installed the helix steel piers spaced on 10 foot centers to repair the CMU retaining wall. Each helix steel pier was a 1 ½" x 1 ½" rounded corner solid square steel shaft with a single lead section having an 8" diameter bearing plate. The helix steel piers were advanced to a length of 10 feet, at a 15 degree angle and were installed to resist the required 22.4 kips of pull-out force. A top attachment (plate series) was then bolted to the top of the helix steel pier and will be cast into a new concrete beam cap.

MacLean Dixie

contact us

If you have any questions or would like additional information regarding Helix Steel Piers, please contact Rob Heckendorn, P.E. at:

 

Email:mail@southcoasthelix.com

Phone:210.316.2146

Fax:830.981.5431

Address:South Coast Helix Foundations, Inc.
P.O. Box 691731
San Antonio, TX 78269

 
 
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