Side Resistance of Drilled Shafts in the Denver and Pierre Formations

by John P. Turner, Univ of Wyoming, Laramie, United States,
Eric Sandberg, Univ of Wyoming, Laramie, United States,
Nelson N. S. Chou, Univ of Wyoming, Laramie, United States,



Document Type: Proceeding Paper

Part of: Design and Performance of Deep Foundations: Piles and Piers in Soil and Soft Rock

Abstract:

Results of load tests on drilled shaft foundations in Upper Cretaceous shales are described and evaluated. Three load tests were conducted on shafts in the Denver Formation, in Denver, Colorado, and ten load tests were conducted on shafts in Pierre Shale, at sites in South Dakota and Colorado. Measured side resistance is evaluated as a function of compressive strength of the supporting rock. Application of the results to design methods for drilled shafts is discussed.

Subject Headings: Load tests | Shafts | Load factors | Drilled shafts | Shale | Rocks | Load and resistance factor design | United States | Colorado | Denver | South Dakota

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