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Extrusion 3D Printing Circular and Horseshoe Tunnel Physical Models (2023-12)

A Comparative Study of Deformation and Brittle Failure

10.1016/j.tafmec.2023.104229

Liu Qiang,  Jiang Quan, Yu Rang, Rong Yao, Sun Yang, Zhao Herui
Journal Article - Theoretical and Applied Fracture Mechanics, Vol. 129, No. 104229

Abstract

The instability of high-stress hard rock tunnels mainly presented with the deformation and brittle failure, the tunnel brittle failure’s location and range are dissimilar under different stress and shape conditions. In this study, similar 3D printing materials are developed according to the brittleness index of the hard rock in an underground cavern. The physical models of circular and horseshoe tunnel with the equal area are printed, and overloading tests are carried out. The test results reveal that the horseshoe tunnel’s peak strength and residual strength are decreased by 17.2% and 6.6% compared with that of the circular tunnel, the circular tunnel’s vertical displacement is greater than the horseshoe tunnel’s, and the depth and range of brittle failure in the circular tunnel are bigger than the horseshoe tunnel’s. The circular tunnel brittle failure is mainly in the middle of both sides’ walls, while the horseshoe tunnel brittle failure is mainly in the bottom of both sides’ walls. The location and range of the tunnels’ brittle failure can be well simulated by using the rock mass deterioration model (RDM) combined with the rock fracture degree (RFD) index, and the numerical simulation results are consistent with the physical simulation experiment results. According to the results of laboratory physical model experiment and numerical simulation, the brittle failure evolution model of hard rock tunnel is proposed, which can provide a reference for the excavation and support design of hard rock tunnel under high stress.

4 References

  1. Jiang Quan, Liu Qiang, Wu Si, Zheng Hong et al. (2022-06)
    Modification Effect of Nano-Silica and Polypropylene-Fiber for Extrusion-Based 3D Printing Concrete:
    Printability and Mechanical Anisotropy
  2. Liu Qiang, Jiang Quan, Huang Mojia, Xin Jie et al. (2022-03)
    Modifying Effect of Anionic Polyacrylamide Dose for Cement-Based 3DP Materials:
    Printability and Mechanical Performance Tests
  3. Liu Qiang, Jiang Quan, Huang Mojia, Xin Jie et al. (2022-10)
    The Fresh and Hardened Properties of 3D Printing Cement-Base Materials with Self-Cleaning Nano-TiO2:
    An Exploratory Study
  4. Ma Guowei, Huang Chen, Zhang Junfei (2023-04)
    Inner Damage-Identification and Residual Strength-Assessment of a 3D Printed Tunnel with Marble-Like Cementitious Materials Using Piezoelectric Transducers

3 Citations

  1. Liu Qiang, Zhang Xinwei, Jiang Quan, Xia Yong et al. (2025-07)
    Effects of Nano-Al2O3, Nano-MgO and Nano-Fe2O3 on the Properties of Cement-Based 3D Printing:
    A Comparative Study
  2. Liu Qiang, Jiang Quan, Zhao Herui, Yu Yang et al. (2025-02)
    Porous Diatomite Promotes Lightweight and Low-Carbon Concrete 3D Printing:
    An Exploratory Study
  3. Zhao Herui, Jiang Quan, Xia Yong, Liu Jian et al. (2024-11)
    Microbial-Induced Carbonate Reinforcement for 3D Printed Concrete:
    Testing in Printable and Mechanical Strength

BibTeX 
@article{liu_jian_yu_rong.2024.E3PCaHTPM,
  author            = "Qiang Liu and Quan Jiang and Rang Yu and Yao Rong and Yang Sun and Herui Zhao",
  title             = "Extrusion 3D Printing Circular and Horseshoe Tunnel Physical Models: A Comparative Study of Deformation and Brittle Failure",
  doi               = "10.1016/j.tafmec.2023.104229",
  year              = "2024",
  journal           = "Theoretical and Applied Fracture Mechanics",
  volume            = "129",
  pages             = "104229",
}
Formatted Citation

Q. Liu, Q. Jiang, R. Yu, Y. Rong, Y. Sun and H. Zhao, “Extrusion 3D Printing Circular and Horseshoe Tunnel Physical Models: A Comparative Study of Deformation and Brittle Failure”, Theoretical and Applied Fracture Mechanics, vol. 129, p. 104229, 2024, doi: 10.1016/j.tafmec.2023.104229.

Liu, Qiang, Quan Jiang, Rang Yu, Yao Rong, Yang Sun, and Herui Zhao. “Extrusion 3D Printing Circular and Horseshoe Tunnel Physical Models: A Comparative Study of Deformation and Brittle Failure”. Theoretical and Applied Fracture Mechanics 129 (2024): 104229. https://doi.org/10.1016/j.tafmec.2023.104229.