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边坡稳定问题一直是岩土工程领域研究的重要课题,但对于基于模态参量变化的动态稳定分析研究不多。因此,研究将坡体重点区域的黏聚力作为动态参量,实现边坡体动态稳定分析评价。基于GIS三维滑坡分析模块,结合实时固有振动频率对黏聚力参量进行调整,实现坡体更加客观的强度折减。固有振动频率与滑坡黏聚力关系的构建,可以有效解决数值分析中参数选取和调节的困难。通过试验和实际边坡的应用,基于模态参量变化的动态数值分析,避开了极限平衡法主观缺点,模拟结果更加符合客观实际。同时,分析结果更加客观、合理,在充分考虑边坡的空间特性的同时,也能客观评价强度折减情况,为边坡稳定性分析提供一个客观有效的新方法。
The slope stability problem has always been an important issue in the field of geotechnical engineering. However, there are not many studies on dynamic stability analysis based on the change of modal parameters. Therefore, the cohesion of the key area of the slope is taken as the dynamic parameter to realize the dynamic stability analysis and evaluation of the slope. Based on GIS three-dimensional landslide analysis module, combined with the real-time natural vibration frequency, the cohesion parameters are adjusted to realize more objective reduction of slope strength. The relationship between natural frequency and landslide cohesion can effectively solve the difficulty of parameter selection and adjustment in numerical analysis. Through the experimental and practical application of slope, the dynamic numerical analysis based on the change of modal parameters avoids the subjective disadvantages of the limit equilibrium method, and the simulation results are more in line with the objective reality. At the same time, the analysis results are more objective and reasonable. The spatial characteristics of the slope are fully considered, and the strength reduction can be objectively evaluated, providing an objective and effective new method for slope stability analysis.