Rapid Evaluation Method for Stability of Seismic-Damaged Loess Highway Slopes

<div class="section abstract"><div class="htmlview paragraph">In response to the inefficiency, slow speed, and reliance on specialized software in traditional methods for evaluating seismic stability of loess highway slopes, a simplified rapid assessment method is proposed. Based on post-earthquake landslide investigations, geotechnical surveys, and vibration table model tests, and integrates the latest research on seismic damage mechanisms of loess slopes, the potential sliding surface of seismic damage loess slope is divided into three segments: tensile fracture, shear, and anti-sliding zones, the potential sliding mass is partitioned into three blocks, and calculate the sliding force and anti-slip force of each potential sliding block from top to bottom, when the sliding force the upper sliding body is greater than its anti-sliding force, the excess sliding force is transmitted to the lower potential sliding body, and the stability of the slope is determined based on the ratio of the anti-sliding force and the sliding force of the lowest potential sliding body. Case validation using the 2013 Baozi Village landslide demonstrates consistency with finite element and limit equilibrium methods, showing strong agreement under dynamic conditions. This method can quickly evaluate the stability of loess highway slope after earthquake, and provide technical support for emergency rescue road safety and secondary disaster prevention and control, and has high practical value.</div></div>