Exploration of Geotechnical Rheological Characteristics Analysis of Nishihara Model and Finite Difference Method
摘要
The analysis of rheological properties of rock and soil is crucial for engineering safety, but existing methods often ignore environmental factors such as temperature, which affects prediction accuracy. This study proposes a method for analyzing rheological properties of rock and soil based on the Nishihara model and finite difference method. The improved model can accurately simulate creep and relaxation characteristics. For example, when the axial stress is 3 MPa, the axial strain reaches 1.008 × 10− 4, and the constant strain is 0.294 × 10− 4, which verifies the correctness of the model; At the initial stage of loading, the vertical stress at the top increases the fastest, and after relaxation, the top stress (23.0 × 104Pa) is lower than that at the middle and bottom (23.8 × 104Pa). Through experimental research on the rheological properties of rock masses, in-depth exploration of the mechanical properties and deformation laws of rocks was conducted, providing theoretical support for the stability and reliability of rock engineering.