Traditional and CPT-based foundation designs: A comparative study

R. Dagger, D. Dasenbrock, P. W. Mayne, David A Saftner

Research output: Chapter in Book/Report/Conference proceedingConference contribution


This paper compares traditional foundation design to direct cone penetration testing (CPT) design using CPT data (i.e., measured cone tip resistance, sleeve friction, and/or measured porewater pressure). Shallow foundations have traditionally been designed in a two-part process to approximate the required size and shape of a foundation: determining the bearing capacity and expected settlement (commonly referred to as displacement) of the soil. The Minnesota Department of Transportation (MnDOT) has created an easy to follow CPT design manual, establishing a process for shallow foundation design directly using CPT data. A systematic procedure is available to transition from the CPT data to bearing capacity accounting for settlement. This paper will focus on applying the design guide to an existing project in Minnesota. The paper will describe a case history from a bridge replacement on TH 24 over the Mississippi River in Clearwater, Minnesota. This project used traditional methods for shallow foundation design and is reexamined using the new MnDOT CPT guide. This study demonstrates efficiency of using direct CPT design in geotechnical practice.

Original languageEnglish (US)
Title of host publicationGeotechnical Special Publication
EditorsChristopher L. Meehan, Sanjeev Kumar, Miguel A. Pando, Joseph T. Coe
PublisherAmerican Society of Civil Engineers (ASCE)
Number of pages9
EditionGSP 307
ISBN (Electronic)9780784482094
ISBN (Print)9780784482094
StatePublished - 2019
Event8th International Conference on Case Histories in Geotechnical Engineering: Foundations, Geo-Congress 2019 - Philadelphia, United States
Duration: Mar 24 2019Mar 27 2019

Publication series

NameGeotechnical Special Publication
NumberGSP 307
ISSN (Print)0895-0563


Conference8th International Conference on Case Histories in Geotechnical Engineering: Foundations, Geo-Congress 2019
CountryUnited States

Bibliographical note

Funding Information:
MnDOT Contract No. 99008-249 provided funding for the research in this paper. The authors gratefully acknowledge this support.

Publisher Copyright:
© 2019 American Society of Civil Engineers.

Copyright 2021 Elsevier B.V., All rights reserved.

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