基于范例推理的边坡失稳风险评估

运用范例推理理论对14个边坡失稳案例进行分析,并用其结果对某国道K1694+830~+960段边坡的稳定性进行评估。研究结果表明:圆弧形滑坡的主要诱因是边坡过陡、岩体的不利产状、软弱夹层的力学性能差和降雨入渗导致孔隙水压力增大和岩土体的强度参数劣化,从而使岩土体更易屈服失稳,滑坍风险大,建议采取必要的措施进行加固。

Risk Assessment of Slope Instability Based on Case-based Reasoning

The mature case-based reasoning theory was used to analyze 14 cases of slope instability and their results were used to assess the stability of slope at the K1694+830~+960 section of a national highway. The results showed that the main cause for circular-arc landslide was steep slope, unfavorable orientation of rock-soil mass, and poor mechanical property of weak intercalation, rainfall infiltration which may increase pore water pressure and degrade the strength parameter of rock soil mass, so the rock soil mass may be easily yielded and instable. Collapse risk of slope at the K1694+830~+960 section of a national highway is serious, so necessary measures for strengthening and protecting the slope shall be taken.