关键词: 岩土工程, 惩罚-激励变权法, TOPSIS评价模型, 边坡稳定性

Abstract: At present, multi-factor stability evaluation models of the highway slope stability often adopt a fixed weight system, which weakens the essential characteristics such as the nonlinearity and emergence of evaluation index complex systems, resulting in evaluation results with deviation. To solve the above problem, a TOPSIS evaluation model of slope stability based on penalty-incentive variable weight method was proposed, which was constructed on the basis of accident-causing theory, from four aspects: construction scale, geological conditions, inducing factors and construction environment. Combined with the application analysis of the construction of Zhangjiakou section of Beijing-Xinjiang Expressway, the feasibility of the proposed model was proved. Research shows that the variable weight theory can highlight the negative effects of the degradation index and make the evaluation result more accurate; the TOPSIS evaluation model based on penalty-incentive variable weight can provide more scientific decision-making for slope stability analysis.

Key words: geotechnical engineering, penalty-incentive variable weight method, TOPSIS evaluation model, slope stability