针对杨林隧道富水围岩蠕变引发的二衬开裂问题，采用已建立的水-力耦合岩石蠕变模型，将其嵌入数值软件进行二次开发。通过收敛-约束法与正交试验，确定了开裂段的新支护方案，并在施作过程中开展了现场监测。最后，利用该程序化模型对新支护方案下的隧道段进行了水-力耦合数值模拟，以评估其长期稳定性。结果表明：(1) 二衬开裂是复合地层断面倾斜页岩夹层偏压与碳质泥岩蠕变效应共同作用的结果；(2) 新支护方案使得围岩位移，拱顶沉降与收敛速率显著降低，位移最终收敛并趋于稳定，工程应用效果良好；(3) 基于二次开发模型的模拟结果与工程实际吻合，验证了该模型在模拟隧道施工蠕变过程中的合理性与准确性。本研究为类似富水蠕变地层中的隧道支护优化与长期稳定性评估提供了参考。

To address the secondary lining cracking caused by creep in water-rich surrounding rock of the Yanglin Tunnel, an established hydro-mechanical coupled creep model for rock was adopted and embedded into numerical software via secondary development. The convergence-confinement method and orthogonal tests were employed to determine an optimized support scheme for the cracked section, and field monitoring was conducted during construction. Subsequently, the programed model was used to perform hydro-mechanical coupled numerical simulations of the tunnel section under the new support scheme to assess its long-term stability. The results indicate that: (1) secondary lining cracking is attributable to the combined effects of unsymmetrical loading induced by inclined shale interlayers in composite strata and the creep behavior of carbonaceous mudstone; (2) the new support scheme significantly reduces surrounding rock displacement, crown settlement, and convergence rate, with displacements eventually converging and stabilizing, demonstrating satisfactory performance in engineering application; (3) the simulation results derived from the secondary development model are in good agreement with field measurements, validating the model's rationality and accuracy in simulating creep processes during tunnel construction. This study provides a reference for tunnel support optimization and long-term stability assessment in similar water-rich creep strata.