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Published in:
2025 | OriginalPaper | Chapter
The Importance of Rock Mass Characterization for Rock Socketed Foundations
Authors : Vasantha Wijeyakulasuriya, Siva Sivakumar, Ajith Dissanayake
Published in: Recent Advances and Innovative Developments in Transportation Geotechnics
Publisher: Springer Nature Singapore
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Abstract
Rock mechanics investigations undertaken by the Department of Transport and Main Roads (TMR) in Queensland, Australia, as part of the pre-tender information for the Second Gateway Bridge (Duplication) have been revisited. In addition to the conventional rock substance characterization, this investigation included rock direct shear tests (CNS and CNL) and a significant number of rock pressuremeter testing to provide specialist rock mechanics information for the design of rock socketed foundations. This paper is focused on the major rock lithology intercepted, i.e., sandstone. Sandstone in the Sydney basin has been widely researched, and the findings from this study are compared with the published information on the Sydney Sandstone as well as from other sources. Findings published by the Second Gateway Bridge Designers are used for comparison where relevant, especially on the test piles which can serve as a useful reference.