Location
New York, New York
Date
14 Apr 2004, 4:30 pm - 6:30 pm
Abstract
Faced with difficult soil conditions for the support of two 6-story office towers in Dublin, CA and of a 6-story parking garage in Sacramento, CA, engineers recommended the use of Geopier Rammed Aggregate Piers to reinforce the soil for the support of high bearing capacity spread footings instead of deep foundations. Foundation selection for both sites was influenced by long-term settlement performance, schedule and cost savings, and seismic uplift resistance. Rammed aggregate piers were installed to strengthen upper weak and compressible soil layers resulting in a substantially stiffer soil layer on which shallow, high bearing capacity spread footings were constructed. Several rammed aggregate piers were also installed with steel anchors to resist seismically induced overturning forces. Design parameter values were confirmed by full scale aggregate pier modulus tests and uplift tests and a 24 hour load test at the Dublin site. Total settlements were estimated to be less than 1½ inches for the Sacramento site and less than 1 inch for the Dublin site. Measured settlements are less than 1 inches total for both projects with differential settlements less than ½ inches, confirming the design approaches and soil properties used for design. Site selection, rammed aggregate pier design methodology, modulus and uplift load test results, and measured settlement performance are presented for two projects in California.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2004 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Majchrzak, Michael; Lew, Marshall; Sorensen, Ken; and Farrell, Tom, "Settlement of Shallow Foundations Constructed over Reinforced Soil: Design Estimates vs. Measurements" (2004). International Conference on Case Histories in Geotechnical Engineering. 41.
https://scholarsmine.mst.edu/icchge/5icchge/session01/41
Settlement of Shallow Foundations Constructed over Reinforced Soil: Design Estimates vs. Measurements
New York, New York
Faced with difficult soil conditions for the support of two 6-story office towers in Dublin, CA and of a 6-story parking garage in Sacramento, CA, engineers recommended the use of Geopier Rammed Aggregate Piers to reinforce the soil for the support of high bearing capacity spread footings instead of deep foundations. Foundation selection for both sites was influenced by long-term settlement performance, schedule and cost savings, and seismic uplift resistance. Rammed aggregate piers were installed to strengthen upper weak and compressible soil layers resulting in a substantially stiffer soil layer on which shallow, high bearing capacity spread footings were constructed. Several rammed aggregate piers were also installed with steel anchors to resist seismically induced overturning forces. Design parameter values were confirmed by full scale aggregate pier modulus tests and uplift tests and a 24 hour load test at the Dublin site. Total settlements were estimated to be less than 1½ inches for the Sacramento site and less than 1 inch for the Dublin site. Measured settlements are less than 1 inches total for both projects with differential settlements less than ½ inches, confirming the design approaches and soil properties used for design. Site selection, rammed aggregate pier design methodology, modulus and uplift load test results, and measured settlement performance are presented for two projects in California.
