Evaluation of a Semi-Empirical p-y Model for Caliche Material Based on Numerical Simulations of Field Load Tests in Cemented Soils
Publication: Geo-Congress 2023
ABSTRACT
The numerical p-y method is a simplified and practical tool to simulate the nonlinear soil-foundation interaction of a laterally loaded drilled shaft. The cemented soil deposits typically found in Las Vegas Valley, known as caliche, are known for unique material characteristics causing uncertainty in foundation design in the region. As of date, there is no known specific p-y model available to simulate the lateral resistance of caliche material in the numerical programs. In this study, a semi-empirical p-y model specifically developed for caliche material is proposed. Stress-strain relationships from available laboratory tests on caliche were scaled to derive the proposed p-y model. Several lateral load tests conducted in cemented soil conditions in Las Vegas were simulated in the finite-difference program, NVShaft, to assess the applicability of the proposed p-y model. It was then compared to other published models for rock materials. This paper demonstrates the need for site-specific laboratory test data to characterize uncommon geo-materials such as caliche to reduce the uncertainty in the deep foundation design.
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Geo-Congress 2023
Pages: 163 - 174
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Published online: Mar 23, 2023
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