Assessment of scouring stability on subgrade slope based on catastrophe theory
Huarong Liao · Journal of Chang'an University · 2011
A new method which combines fuzzy math and catastrophe theory was introduced to assess scouring stability on subgrade slope in the condition of rainfall,and a stable slope erosion comprehensive assessment system was developed on the base of on-site monitoring data.In order to avoid the subjectivity of artificial weight,the catastrophe theory is applied to multi-criteria evaluation and decision.Firstly,select the underlying Index from on-site monitoring data and calculate according to standardized membership function,then the ultimate catastrophe function of scouring slope is obtained through quantitative computing by the normalization formula of different catastrophe models,thus achieving the stability of the slope safety evaluation.Finally,an engineering example is analyzed by the method.The results indicate that the evaluation method is scientific and feasible.4 tabs,1 fig,12 refs.