Case Study 590-5

ATLAS
RESISTANCE
PIERS

 

STRUCTURAL STABILIZATION
DURING EXCAVATION ADJACENT
TO AN EXISTING FOUNDATION

Chicago, Illinois

 

Installed by:

The Concrete Doctor, Inc.
Lincolnshire, Illinois

 

ADJACENT STRUCTURE STABILIZATION!

Five story structure of masonry construction

Description of the Structure:
The five story structure is of masonry construction with built-up roof. The foundation is a cast concrete and masonry stem wall without a suitable footing.

Need for Underpinning:
Excavation was required adjacent to this structure for new building. The engineer required that supplemental foundation support be installed to prevent settlement and possible structural failure of existing buildings prior to the adjacent soils being excavated.

Soil Description:    Soil tests revealed that bearing stratum was available at approximately 80 feet below basement level.

ATLAS Product Installed:
Because no spread footing was encountered, ATLAS 2-Piece Plate Piers were chosen for this project. The grout filled pier pipe was 4 inch diameter with a wall thickness of 0.219 inch.

PROJECT SUMMARY
Engineered By: Collins Engineers, Chicago, Illinois
Installed By: The Concrete Doctor, Inc., Lincolnshire, Illinois
Average Drive Force: 75,000 pounds at an average depth of 80 feet
ATLAS Part Number: AP2P-PP-4000 2-Piece Plate Resistance Pier
Amount of Lift: None (Stabilization of a structure which had not settled.)
Average Factor of Safety: 1.2 : 1 (Ultimate)

Stem wall of the existing five story building after stabilization

QUICKLY INSTALLED!
Each ATLAS RESISTANCE PIER was driven to a suitable bearing stratum and tested. The photographs show the stem wall of the existing five story building after stabilization. The pier pipes were filled with grout for additional strength following the installation and load testing of each ATLAS RESISTANCE PIER.

Stem wall of the existing five story building after stabilization092.jpg (38850 bytes)

THE SOLUTION! Atlas Resistance Piers

Chance Civil Construction
1026-B South Powell Road
Independence, MO 64056
Office: (816) 796-6800
Fax: (816) 796-0919
Toll Free: (877) 285-2739
Email: info@atlassys.com