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X-ray computed tomography characterization of soil and rock mixture under cyclic triaxial testing: the effects of confining pressure on meso-structural changes
Wang, Y.1; Zhang, D.1; Hu, Y. Z.2
2019-03-01
Source PublicationENVIRONMENTAL EARTH SCIENCES
ISSN1866-6280
Volume78Issue:6Pages:17
AbstractThe mechanical meso-damage mechanism of soil and rock mixture (SRM) subjected to cyclic loading is very significant to evaluate the stability of construction and building structures composed of SRM. However, to date, few experiments have been done to investigate the physical mesoscopic damage evolution in SRM. In this work, cyclic triaxial tests were conducted on soil and rock mixture samples with rock block percentage of 40%, under confining pressures (CPs) of 60kPa, 120kPa, and 200kPa using in situ X-ray computed tomography technique. The effects of confining pressure on the meso-structural changes have been visualized and investigated by CT image analysis. For the SRM samples, hysteresis loop on the cyclic stress-strain curves presents different pattern that is caused by the differential applied CP. The hysteresis loop area first decreased and then increased with plastic deformation increasing for samples under a CP of 60kPa and 120kPa; however, it shows monotonously decreasing trend under a CP of 200kPa. In addition, after extracting cracks from the original CT images, it shows that the damage initiation moment of SRM is different even though with the same stress amplitude. The crack geometric parameters, however, decreased under larger confining pressure mainly due to the restriction of rock block movement. The stress dilatancy characteristics of SRM under various CPs also presented different trend from the volumetric change analysis on the CT images. The interlocking among rock blocks restricts the development of localized bands under high CP, and the ability to resist cyclic damage improves with the increase of CP.
KeywordConfining pressure Cyclic loading X-ray CT Meso-structural change Soil and rock mixture (SRM)
DOI10.1007/s12665-019-8161-z
Funding OrganizationNational key technologies Research & Development program ; National key technologies Research & Development program ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National key technologies Research & Development program ; National key technologies Research & Development program ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National key technologies Research & Development program ; National key technologies Research & Development program ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National key technologies Research & Development program ; National key technologies Research & Development program ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordFAULT BRECCIA ; MECHANICAL-PROPERTIES ; STRENGTH ; DEFORMATION ; BEHAVIOR ; MODULUS ; IMAGE ; CT ; STRESS ; BLOCKS
Language英语
Funding ProjectNational key technologies Research & Development program[2018YFC0808402] ; National key technologies Research & Development program[2018YFC0604601] ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology[SKLGDUEK1824] ; Fundamental Research Funds for the Central Universities[2302017FRF-TP-17-027A1] ; National Natural Science Foundation of China[41502294]
Funding OrganizationNational key technologies Research & Development program ; National key technologies Research & Development program ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National key technologies Research & Development program ; National key technologies Research & Development program ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National key technologies Research & Development program ; National key technologies Research & Development program ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National key technologies Research & Development program ; National key technologies Research & Development program ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining Technology ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaEnvironmental Sciences & Ecology ; Geology ; Water Resources
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000460561000006
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90884
Collection页岩气与地质工程院重点实验室
Corresponding AuthorWang, Y.
Affiliation1.Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Wang, Y.,Zhang, D.,Hu, Y. Z.. X-ray computed tomography characterization of soil and rock mixture under cyclic triaxial testing: the effects of confining pressure on meso-structural changes[J]. ENVIRONMENTAL EARTH SCIENCES,2019,78(6):17.
APA Wang, Y.,Zhang, D.,&Hu, Y. Z..(2019).X-ray computed tomography characterization of soil and rock mixture under cyclic triaxial testing: the effects of confining pressure on meso-structural changes.ENVIRONMENTAL EARTH SCIENCES,78(6),17.
MLA Wang, Y.,et al."X-ray computed tomography characterization of soil and rock mixture under cyclic triaxial testing: the effects of confining pressure on meso-structural changes".ENVIRONMENTAL EARTH SCIENCES 78.6(2019):17.
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