Location
San Diego, California
Presentation Date
27 May 2010, 4:30 pm - 6:20 pm
Abstract
A popular method to evaluate earthquake induced settlements in dry sands is the approach proposed by Pradel (1998) which was based on standard penetration test (SPT) results and is only applicable to clean sands. A simple modification of the Pradel (1998) method is proposed based on cone penetration test (CPT) results and is extended to cover a wide range of unsaturated soils. A key parameter in the method by Pradel (1998) is the small strain shear modulus, Go, which can be estimated from the CPT or measured using the seismic CPT. The CPT can provide a continuous evaluation of seismic compression that allows the expeditious analysis of complicated soil profiles and a framework for sensitivity analyses. Soil parameters, such as soil type, fines content, and equivalent SPT blow count interpolated from CPTs, were compared with adjacent borings and related laboratory test results from a ground improvement site. Both vibro-stone columns and compaction grouting were adopted to mitigate the site seismic settlement. The proposed simple modification of the Pradel method provided a valuable tool to evaluate the effectiveness of ground improvement work.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2010 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
Robertson, P. K. and Shao, Lisheng, "Estimation of Seismic Compression in Dry Soils Using the CPT" (2010). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 18.
https://scholarsmine.mst.edu/icrageesd/05icrageesd/session04/18
Included in
Estimation of Seismic Compression in Dry Soils Using the CPT
San Diego, California
A popular method to evaluate earthquake induced settlements in dry sands is the approach proposed by Pradel (1998) which was based on standard penetration test (SPT) results and is only applicable to clean sands. A simple modification of the Pradel (1998) method is proposed based on cone penetration test (CPT) results and is extended to cover a wide range of unsaturated soils. A key parameter in the method by Pradel (1998) is the small strain shear modulus, Go, which can be estimated from the CPT or measured using the seismic CPT. The CPT can provide a continuous evaluation of seismic compression that allows the expeditious analysis of complicated soil profiles and a framework for sensitivity analyses. Soil parameters, such as soil type, fines content, and equivalent SPT blow count interpolated from CPTs, were compared with adjacent borings and related laboratory test results from a ground improvement site. Both vibro-stone columns and compaction grouting were adopted to mitigate the site seismic settlement. The proposed simple modification of the Pradel method provided a valuable tool to evaluate the effectiveness of ground improvement work.
