Rock Deformation under Various Degrees of Karst Development
Publication: Journal of Performance of Constructed Facilities
Volume 33, Issue 5
Abstract
Karst development and the deformation response of erosive rocks significantly influence the stability of cutting slopes. In this research, cutting slopes for high-speed railways was investigated in karst areas, and four representative points with various degrees of karst development were chosen to examine the rock response by applying rectangular rigid bearing plate tests. The displacement distribution of the rock under the plate was analyzed using elastic half space model theory. Results corroborate that, although the erosive rock experienced loading–unloading cyclic loading, the envelope diagram was upward convex. When a relatively lower load was applied, the slope of the curve was steep, and the rock deformation was smaller. As the load increased, the slope of the curve became moderate; under the same load condition, rocks with a high degree of karst development had high deformation and deformation modulus values. However, rocks that were less influenced or unaffected by karst development had minimal deformation. At the same point under the bearing plate, increasing the load enhanced the displacement of the point, and the deformation value became high as the degree of karst development strengthened.
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Acknowledgments
This work is supported by the National Natural Science Foundation of China (Nos. 41672339 and 41072256). The authors would like to express their gratitude to the editors and reviewers for their constructive and helpful review comments. They declare no conflicts of interest.
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Published In
Journal of Performance of Constructed Facilities
Volume 33 • Issue 5 • October 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jul 2, 2018
Accepted: Jan 10, 2019
Published online: Jul 15, 2019
Published in print: Oct 1, 2019
Discussion open until: Dec 15, 2019
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