Probabilistic Approach for Design of Drilled Shafts Socketed in Weak Rock in Oklahoma

Loehr, J. Erik; Boeckmann, Andrew; Burton, Elgin; Ding, Dan

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Probabilistic Approach for Design of Drilled Shafts Socketed in Weak Rock in Oklahoma

2024-05-01
By Loehr, J. Erik ; Boeckmann, Andrew ; Burton, Elgin ; ...

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English

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Creators:

Loehr, J. Erik ; Boeckmann, Andrew ; Burton, Elgin ; Ding, Dan
Corporate Creators:

University of Missouri
Corporate Contributors:

United States. Department of Transportation. Federal Highway Administration ; Oklahoma. Department of Transportation. Office of Research and Implementation
Subject/TRT Terms:

Calibration Design Load Tests Shaft Sinking Weak Rock
Publication/ Report Number:

FHWA-OK-23-02
Resource Type:

Tech Report
Geographical Coverage:

United States ; Oklahoma
Edition:

Final Report Oct 2017 - Mar 2023
Corporate Publisher:

Oklahoma. Department of Transportation
Abstract:

This report documents the conduct and findings of a research program undertaken to evaluate alternative methods for design of drilled shafts founded in weak rock in Oklahoma, and to develop probabilistically calibrated resistance factors to achieve a target design reliability for recommended design methods. The report documents important background information, selection and characterization of two load test sites, construction of a total of eight test shafts, axial and lateral load testing of the construction shafts, and analyses conducted to interpret measurements for all field tests. Collective analysis of the axial load tests conducted for the project with additional load tests performed in Oklahoma and surrounding states was used to identify recommended relations for determining unit side and unit tip resistance for drilled shafts in weak rock. Three design relations are recommended for predicting unit tip resistance based on Texas Cone Penetration Test measurements, compressive strength measurements, and Standard Penetration Test measurements. Three additional relations are recommended for predicting unit side resistance based on similar measurements. Probabilistically calibrated resistance factors are also provided for the recommended design relations. Recommendations for design of drilled shafts in weak rock for lateral loads are also provided based on analysis of measurements from the lateral load tests.
Format:

PDF
Funding:

2279
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:33e1dc8a2094514468bd8f2b2978a1b7e6d82b68b9f2fc4d5d5ea130d7e0fd9cef34bad9732948ecf8374c9c9b4a65a5fafe1dfc37a2bdad880eecd97c344832
Download URL:

https://rosap.ntl.bts.gov/view/dot/89161/dot_89161_DS1.pdf
File Type:

[PDF - 36.35 MB ]

File Language:

English

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