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Article

The Secondary Development and Application of the Improved Nishihara Creep Model in Soft Rock Tunnels

by
Xianghui Deng
1,2,
Junxin Shi
1,
Xiaolin Li
3,
Rui Wang
1,2,*,
Jinzeng Zhang
3 and
Xin Yang
1
1
School of Civil and Architecture Engineering, Xi’an Technological University, Xi’an 710021, China
2
Xi’an Key Laboratory of Civil Engineering Testing and Destruction Analysis on Military-Civil Dual Use Technology, Xi’an 710021, China
3
China Railway 18th Bureau Group Corporation Limited, Tianjin 300222, China
*
Author to whom correspondence should be addressed.
Buildings 2023, 13(8), 2082; https://doi.org/10.3390/buildings13082082
Submission received: 15 July 2023 / Revised: 3 August 2023 / Accepted: 15 August 2023 / Published: 16 August 2023
(This article belongs to the Special Issue Design, Construction and Maintenance of Underground Structures)
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Abstract

Given the complexity and diversity of rock formations, existing constitutive models struggle to accurately portray their mechanical properties, leading to substantial discrepancies between numerical simulation outcomes and reality. This inadequacy fails to meet the demands of numerical analysis in practical engineering. This study first analyzes the physical and mechanical properties of thin-layered carbonaceous phyllite. Subsequently, an improved Nishihara rheological constitutive model is established based on these analyses. Utilizing the secondary development function offered by FLAC3D, the proposed model is further developed. The program’s correctness and reliability are confirmed through a numerical simulation using the triaxial creep test from existing research. Finally, the established constitutive model is applied in the numerical simulation of an actual soft rock tunnel engineering, obtaining results compared to real monitoring data. The results demonstrate that the improved Nishihara model is more effective at describing the creep deformation characteristics of soft rock. Moreover, the findings from this study can serve as a theoretical reference for predicting deformation in soft rock tunnel engineering.
Keywords: improved Nishihara model; FLAC3D; secondary development; creep deformation; soft rock tunnel improved Nishihara model; FLAC3D; secondary development; creep deformation; soft rock tunnel

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MDPI and ACS Style

Deng, X.; Shi, J.; Li, X.; Wang, R.; Zhang, J.; Yang, X. The Secondary Development and Application of the Improved Nishihara Creep Model in Soft Rock Tunnels. Buildings 2023, 13, 2082. https://doi.org/10.3390/buildings13082082

AMA Style

Deng X, Shi J, Li X, Wang R, Zhang J, Yang X. The Secondary Development and Application of the Improved Nishihara Creep Model in Soft Rock Tunnels. Buildings. 2023; 13(8):2082. https://doi.org/10.3390/buildings13082082

Chicago/Turabian Style

Deng, Xianghui, Junxin Shi, Xiaolin Li, Rui Wang, Jinzeng Zhang, and Xin Yang. 2023. "The Secondary Development and Application of the Improved Nishihara Creep Model in Soft Rock Tunnels" Buildings 13, no. 8: 2082. https://doi.org/10.3390/buildings13082082

APA Style

Deng, X., Shi, J., Li, X., Wang, R., Zhang, J., & Yang, X. (2023). The Secondary Development and Application of the Improved Nishihara Creep Model in Soft Rock Tunnels. Buildings, 13(8), 2082. https://doi.org/10.3390/buildings13082082

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