Strength Characteristics of Nonpenetrating Joint Rock Mass under Different Shear Conditions
Joint Authors
Chen, Qingzhi
Liu, Yuanming
Pu, Shaoyun
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-08-24
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
The mechanical property of jointed rock mass is an important factor to be considered in the analysis, evaluation, and design of actual rock engineering.
The existence of joints threatens the stability and safety of underground engineering projects built in the rock mass.
In order to study the change of mechanical properties and strength characteristics of nonpenetrating jointed rock mass under different test conditions, direct shear tests and triaxial tests were carried out.
Direct shear tests under different normal stresses were carried out for nonpenetrating jointed rock mass to prepare specimens for triaxial tests.
Then, triaxial tests were carried out to study the change of mechanical properties and strength characteristics of the nonpenetrating jointed rock mass.
In the direct shear test part, the greater the normal stress is, the stronger the shear strength and the more serious the shear failure would be.
The main conclusions are as follows: (1) the strength of rock mass would increase with the increase of confining pressure for those rock specimens with same degrees of shear after the direct shear test; (2) for rock specimens with different degrees of shear after the direct shear test, if the shearing degree of the rock specimen was greater, the strength of the rock specimen would be lower in the triaxial test; (3) for rock specimens with the same damage degree after direct shear test, the greater the normal stress in direct shear test is, the smaller the peak axial pressure would be in the triaxial test; (4) if the specimen was sheared under higher normal stress in direct shear test, the cohesion of it would be lower and the internal friction angle would be larger.
For the specimens under the same normal stress, if the shear failure of one specimen was more serious, the cohesion of it would be smaller and the internal friction angle would be larger.
American Psychological Association (APA)
Chen, Qingzhi& Liu, Yuanming& Pu, Shaoyun. 2020. Strength Characteristics of Nonpenetrating Joint Rock Mass under Different Shear Conditions. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1121368
Modern Language Association (MLA)
Chen, Qingzhi…[et al.]. Strength Characteristics of Nonpenetrating Joint Rock Mass under Different Shear Conditions. Advances in Civil Engineering No. 2020 (2020), pp.1-13.
https://search.emarefa.net/detail/BIM-1121368
American Medical Association (AMA)
Chen, Qingzhi& Liu, Yuanming& Pu, Shaoyun. Strength Characteristics of Nonpenetrating Joint Rock Mass under Different Shear Conditions. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1121368
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1121368