基于软岩蠕变模型的西南山区路堑边坡锚索预应力损失及稳定性评估方法研究

coupled analysis framework integrating soft rock creep model and anchor cable prestress loss model was established via systematically investigates the creep effects in soft rock slopes. Through theoretical derivation and numerical simulation, the time-dependent evolution law of equivalent elastic modulus of rock was revealed, and an inverse analysis method for soft rock creep parameters was developed based on measured anchor prestress data. A comprehensive evaluation system for cut slope stability considering time-varying prestress loss is constructed by innovatively combining limit equilibrium theory with finite element analysis technology. Taking a typical soft rock cut slope project on a Southwest mountainous expressway as an engineering case, the long-term stability state of the slope was quantitatively predicted using monitoring data of cross-anchor prestress while dynamic monitoring thresholds were established. The research results provide theoretical support for the optimization of high slope reinforcement design and life-cycle safety management, demonstrating significant engineering value for ensuring the safe operation of transportation infrastructure.