Proceedings of the 2023 9th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2023)

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Study on Creep Test and Constitutive Model of Layered Soft Rock

Authors
Chun Liu1, Heng Liu1, *, Haizhuang Liu1, Yiying Xiong1, Chao Tang1, Zexi Zhou1
1Safety Engineering College, Chongqing University of Science and Technology, Chongqing, 401331, China
*Corresponding author. Email: 786926856@qq.com
Corresponding Author
Heng Liu
Available Online 30 December 2023.
DOI
10.2991/978-94-6463-336-8_8How to use a DOI?
Keywords
layered soft rock; creep test; creep constitutive model; data fitting; the numerical simulation
Abstract

The basic mechanical parameters of rock are obtained and the creep curves under different stress loads are obtained to reveal the creep law of layered soft rock under different stress loads. According to the creep test results, the linear Burgers creep model is used to fit the test data. The fitting effect of the attenuation creep stage and stable creep stage is better, and the fitting effect of the accelerated creep stage is poor. To describe the accelerated creep stage of layered rock more accurately, based on the Mohr-Coulomb strength criterion, a plastic element is introduced, which is connected in series with the linear Burgers creep model to form an improved nonlinear Burgers creep model. The model is used to re-fit the experimental data. The results show that the fitting effect of the accelerated creep stage is significantly better than that of the linear creep model. The nonlinear Burgers creep model file is compiled by using FISH language embedded in FLAC3D for numerical simulation analysis, and the creep results are compared with the field monitoring data. The change rule of the two data is close, indicating that the improved nonlinear model can more accurately describe the creep characteristics of layered soft rock.

Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2023 9th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2023)
Series
Advances in Engineering Research
Publication Date
30 December 2023
ISBN
10.2991/978-94-6463-336-8_8
ISSN
2352-5401
DOI
10.2991/978-94-6463-336-8_8How to use a DOI?
Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Chun Liu
AU  - Heng Liu
AU  - Haizhuang Liu
AU  - Yiying Xiong
AU  - Chao Tang
AU  - Zexi Zhou
PY  - 2023
DA  - 2023/12/30
TI  - Study on Creep Test and Constitutive Model of Layered Soft Rock
BT  - Proceedings of the 2023 9th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2023)
PB  - Atlantis Press
SP  - 55
EP  - 66
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-336-8_8
DO  - 10.2991/978-94-6463-336-8_8
ID  - Liu2023
ER  -