Evaluation of Deformation and Permeability Behavior of Amygdaloidal Basalt under a Triaxial Cyclic Loading Creep Test
Joint Authors
Xu, Weiya
Yan, Long
Li, Biao
Gu, Jinjian
Ji, Hua
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-11-26
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Amygdaloidal basalt is a typical rock mass in the dam foundation of the Baihetan hydropower project in southwest China.
With rising and drawdown of the reservoir water level, the permeability and creep deformation characteristics of the amygdaloidal basalt are much complicated in the long-term cyclic loading processes.
A cyclic loading-unloading creep test on the amygdaloidal basalt was performed to evaluate its deformation and permeability behavior.
The results showed that Poisson’s ratio and elastic modulus of the rock specimen varied significantly under different loading processes with a relatively large irreversible deformation.
The permeability and strain rates of rock changed in two phases under lower deviatoric stresses, while there are three typical stages of strain growth with the final stress level of 121.8 MPa.
For axial stress of 128 MPa, the creep deformation and creep rate in the axial direction are smaller than these in the lateral direction.
Before the sample failure, the lateral deformation accelerates earlier than the axial deformation.
The results also suggested that the permeability of the rock specimens decreases considerably during each loading process and then tends to be constant with time.
No apparent change in steady permeability is observed with variation of stress.
For 128 MPa axial stress, the permeability first decreases, then tends to be in a stable value, and at last increases during the sample failure.
American Psychological Association (APA)
Yan, Long& Xu, Weiya& Li, Biao& Ji, Hua& Gu, Jinjian. 2020. Evaluation of Deformation and Permeability Behavior of Amygdaloidal Basalt under a Triaxial Cyclic Loading Creep Test. Geofluids،Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1165092
Modern Language Association (MLA)
Yan, Long…[et al.]. Evaluation of Deformation and Permeability Behavior of Amygdaloidal Basalt under a Triaxial Cyclic Loading Creep Test. Geofluids No. 2020 (2020), pp.1-9.
https://search.emarefa.net/detail/BIM-1165092
American Medical Association (AMA)
Yan, Long& Xu, Weiya& Li, Biao& Ji, Hua& Gu, Jinjian. Evaluation of Deformation and Permeability Behavior of Amygdaloidal Basalt under a Triaxial Cyclic Loading Creep Test. Geofluids. 2020. Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1165092
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1165092