Model Test Study on the Anisotropic Characteristics of Columnar Jointed Rock Mass
Because of its special structure, the anisotropic properties of columnar jointed rock mass (CJRM) are complicated, which brings difficulty to engineering construction. To comprehensively study the anisotropic characteristics of CJRM, uniaxial compression tests were conducted on artificial CJRM speci...
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doaj-c3d62a008d2948c597f9164fe4409fff2020-11-25T03:07:26ZengMDPI AGSymmetry2073-89942020-09-01121528152810.3390/sym12091528Model Test Study on the Anisotropic Characteristics of Columnar Jointed Rock MassZhende Zhu0Xiangcheng Que1Zihao Niu2Wenbin Lu3Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaBecause of its special structure, the anisotropic properties of columnar jointed rock mass (CJRM) are complicated, which brings difficulty to engineering construction. To comprehensively study the anisotropic characteristics of CJRM, uniaxial compression tests were conducted on artificial CJRM specimens. Quadrangular, pentagonal and hexagonal prism CJRM models were introduced, and the dip direction of the columnar joints was considered. Based on the test results and the structural features of the three CJRM models, the deformation and strength characteristics of CJRM specimens were analyzed and compared. The failure modes and mechanisms of artificial specimens with different dip directions were summarized in accordance with the failure processes and final appearances. Subsequently, the anisotropic degrees of the three CJRM models in the horizontal plane were classified, and their anisotropic characteristics were described. Finally, a simple empirical expression was adopted to estimate the strength and deformation of the CJRM, and the derived equations were used in the Baihetan Hydropower Station project. The calculated values are in good agreement with the existing research results, which reflects the engineering application value of the derived empirical equations.https://www.mdpi.com/2073-8994/12/9/1528model testcolumnar jointed rock massanisotropic characteristicscross-sectional shapedip direction |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhende Zhu Xiangcheng Que Zihao Niu Wenbin Lu |
spellingShingle |
Zhende Zhu Xiangcheng Que Zihao Niu Wenbin Lu Model Test Study on the Anisotropic Characteristics of Columnar Jointed Rock Mass Symmetry model test columnar jointed rock mass anisotropic characteristics cross-sectional shape dip direction |
author_facet |
Zhende Zhu Xiangcheng Que Zihao Niu Wenbin Lu |
author_sort |
Zhende Zhu |
title |
Model Test Study on the Anisotropic Characteristics of Columnar Jointed Rock Mass |
title_short |
Model Test Study on the Anisotropic Characteristics of Columnar Jointed Rock Mass |
title_full |
Model Test Study on the Anisotropic Characteristics of Columnar Jointed Rock Mass |
title_fullStr |
Model Test Study on the Anisotropic Characteristics of Columnar Jointed Rock Mass |
title_full_unstemmed |
Model Test Study on the Anisotropic Characteristics of Columnar Jointed Rock Mass |
title_sort |
model test study on the anisotropic characteristics of columnar jointed rock mass |
publisher |
MDPI AG |
series |
Symmetry |
issn |
2073-8994 |
publishDate |
2020-09-01 |
description |
Because of its special structure, the anisotropic properties of columnar jointed rock mass (CJRM) are complicated, which brings difficulty to engineering construction. To comprehensively study the anisotropic characteristics of CJRM, uniaxial compression tests were conducted on artificial CJRM specimens. Quadrangular, pentagonal and hexagonal prism CJRM models were introduced, and the dip direction of the columnar joints was considered. Based on the test results and the structural features of the three CJRM models, the deformation and strength characteristics of CJRM specimens were analyzed and compared. The failure modes and mechanisms of artificial specimens with different dip directions were summarized in accordance with the failure processes and final appearances. Subsequently, the anisotropic degrees of the three CJRM models in the horizontal plane were classified, and their anisotropic characteristics were described. Finally, a simple empirical expression was adopted to estimate the strength and deformation of the CJRM, and the derived equations were used in the Baihetan Hydropower Station project. The calculated values are in good agreement with the existing research results, which reflects the engineering application value of the derived empirical equations. |
topic |
model test columnar jointed rock mass anisotropic characteristics cross-sectional shape dip direction |
url |
https://www.mdpi.com/2073-8994/12/9/1528 |
work_keys_str_mv |
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