Assessing the Strength and Failure Mechanism of Cement-Filled Metamorphic Rock
Journal
Lecture Notes in Civil Engineering
Journal Volume
395
Start Page
893
End Page
904
ISSN
23662557
ISBN (of the container)
9789819997213
Date Issued
2024
Author(s)
Abstract
The mechanical properties of metamorphic rocks are affected by the existence of foliation, which induces apparent anisotropy and heterogeneity. This study performed a series of pull-off and direct shear tests to investigate the tensile strength, peak, and residual shear strength of schist foliation. Finally, the effect of grout reinforcement on fractured foliation was evaluated. The key findings include: (1) A nonlinear failure criterion for foliation was adopted to reasonably describe the failure envelope of schist; (2) Considering the grout reinforcement on fractured foliation, the strength of grouted schists significantly increased. The high roughness strongly contributes to the grout reinforcement on the schist foliation; (3) The severely fractured specimen with a rough surface reflects both material and interface failures, while the specimen with a low roughness exhibits interface failure. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.
Event(s)
5th International Conference on Geotechnics for Sustainable Infrastructure Development, GEOTEC 2023
Subjects
Cement-filled metamorphic rock
Direct shear test
Failure mechanism
Joint roughness
Shear strength
Publisher
Springer Science and Business Media Deutschland GmbH
Description
5th International Conference on Geotechnics for Sustainable Infrastructure Development, GEOTEC 2023, 14 December 2023 through 15 December 2023, Hanoi
Type
conference paper