Location
Chicago, Illinois
Date
02 May 2013, 2:00 pm - 3:30 pm
Abstract
Base grouting is becoming more widely promoted in the drilled shaft industry as a means to improve shaft response to load. There are a limited number of full-scale field comparisons of test shafts which have been base grouted and adjacent test shafts which have not. This paper presents several case histories of full-scale static load test shafts as well as the results of the tests conducted on adjacent shafts with and without base grouting. The paper compares six pairs of adjacent grouted and ungrouted shafts on 5 separate projects in various parts of the United States. All tests were performed using the Osterberg cell (O-cell) test method. The comparisons yielded some intriguing results. In some cases the results matched theory quite well and showed some improvement to stiffness and overall capacity. In other cases this was not the case. Among other conclusions, the paper illustrates the need for further load testing and research to better understanding how drilled shaft capacity is affected by base grouting, particularly how the capacity is affected by technique, methods and quality control in various materials.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
7th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2013 Missouri University of Science and Technology, 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
Sinnreich, Jon and Simpson, Robert C., "Base Grouting Case Studies Including Full Scale Comparative Load Testing" (2013). International Conference on Case Histories in Geotechnical Engineering. 5.
https://scholarsmine.mst.edu/icchge/7icchge/session02/5
Base Grouting Case Studies Including Full Scale Comparative Load Testing
Chicago, Illinois
Base grouting is becoming more widely promoted in the drilled shaft industry as a means to improve shaft response to load. There are a limited number of full-scale field comparisons of test shafts which have been base grouted and adjacent test shafts which have not. This paper presents several case histories of full-scale static load test shafts as well as the results of the tests conducted on adjacent shafts with and without base grouting. The paper compares six pairs of adjacent grouted and ungrouted shafts on 5 separate projects in various parts of the United States. All tests were performed using the Osterberg cell (O-cell) test method. The comparisons yielded some intriguing results. In some cases the results matched theory quite well and showed some improvement to stiffness and overall capacity. In other cases this was not the case. Among other conclusions, the paper illustrates the need for further load testing and research to better understanding how drilled shaft capacity is affected by base grouting, particularly how the capacity is affected by technique, methods and quality control in various materials.
