Hu Taotao, Zhao Yulong, Tu Peng, Liu Jianlong
Sclool of Highway, Chang'an University, Xi'an, 710064, People's Republic of China.
CCCC Second Highway Engineering CO., LTD, Xi'an, 710065, People's Republic of China.
Sci Rep. 2024 Dec 3;14(1):30120. doi: 10.1038/s41598-024-81540-6.
Based on the Hohai model, a creep constitutive model of viscoelastic-plastic soft rock with joint fracture damage is proposed to solve the rheological failure problem in soft rock tunnels surrounding rock. Based on the proposed creep model of rock with joint damage and the current analytical analysis method of circular tunnel, the analytical formulas of viscoelastic-viscoplastic stress and displacement of circular tunnel with joint damage surrounding rock are derived. ABAQUS finite element software is used to simulate the excavation of surrounding rock with different joint angles. The numerical solution is compared with the analytical solution to verify the accuracy of the theoretical formula. The results show that when the joint inclination is 45°, the displacement values of the two are 16.36 mm and 16.87 mm respectively. The error of the two is 3.02%. The theoretical calculation is in good agreement with the numerical simulation results, verifying the rationality of the derived analytical formula of viscoelastic-viscoplastic stress and displacement of soft rock tunnel with joint damage.
基于河海模型，提出一种考虑节理裂隙损伤的黏弹塑性软岩蠕变本构模型，以解决软岩巷道围岩的流变破坏问题。基于所提出的含节理损伤岩石蠕变模型及圆形巷道现有的解析分析方法，推导了含节理损伤围岩圆形巷道的黏弹性-黏塑性应力及位移解析公式。利用ABAQUS有限元软件模拟不同节理角度围岩的开挖情况。将数值解与解析解进行对比，验证理论公式的准确性。结果表明，当节理倾角为45°时，二者的位移值分别为16.36mm和16.87mm，二者误差为3.02%。理论计算结果与数值模拟结果吻合良好，验证了所推导的含节理损伤软岩巷道黏弹性-黏塑性应力及位移解析公式的合理性。
