Failure Behaviour of Sandstone with a Preexisting Joint under Stepped Excavation
Joint Authors
He, Liwen
Cao, Ping
Liu, Yinzhu
Lin, Qibin
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-08-31
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Much geotechnical construction needs to be carried out under the condition of stepped excavation.
However, there is still a lack of research on crack coalescence and failure modes of jointed rock mass under stepped excavation conditions.
In order to simulate the stepped excavation test of the real project, the polylactic acid (PLA) material is selected as the filler for the excavation area.
The stepped excavation tests are performed on sandstone specimens containing a preexisting joint under different normal load conditions.
The dynamic stepped excavation of simulating excavate rock engineering is realised.
The constant normal loads during the excavation process are determined to be 80 kN and 100 kN.
The influence of the joint inclination on the failure characteristics of the excavation process is analysed.
Four typical failure modes are summarised: (a) Mode I: crack coalescence of tensile failure; (b) Mode II: crack coalescence of mixed failure; (c) Mode III: without crack coalescence of mixed failure; (d) Mode IV: without crack coalescence of shear failure.
Furthermore, the failure characteristics of the area above the excavation hole and the preexisting joint are analysed.
The results show that there are three failure modes: (a) Type I: spalling failure; (b) Type II: shear slip failure; (c) Type III: shear slip and spalling mixed failure.
American Psychological Association (APA)
Liu, Yinzhu& Cao, Ping& He, Liwen& Lin, Qibin. 2020. Failure Behaviour of Sandstone with a Preexisting Joint under Stepped Excavation. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1125233
Modern Language Association (MLA)
Liu, Yinzhu…[et al.]. Failure Behaviour of Sandstone with a Preexisting Joint under Stepped Excavation. Advances in Civil Engineering No. 2020 (2020), pp.1-11.
https://search.emarefa.net/detail/BIM-1125233
American Medical Association (AMA)
Liu, Yinzhu& Cao, Ping& He, Liwen& Lin, Qibin. Failure Behaviour of Sandstone with a Preexisting Joint under Stepped Excavation. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1125233
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1125233