曾胜, 胡甜, 赵健, 林琳, 李卫. 2012: 基于 Fuzzy-AHP 的堆积体边坡稳定性评价研究. 工程地质学报, 20(6): 926-933.
    引用本文: 曾胜, 胡甜, 赵健, 林琳, 李卫. 2012: 基于 Fuzzy-AHP 的堆积体边坡稳定性评价研究. 工程地质学报, 20(6): 926-933.
    ZENG Sheng, HU Tian, ZHAO Jian, LIN Lin, LI Wei. 2012: FUZZY-AHP METHOD BASED EVALUATION OF ACCUMULATION SLOPE STABILITY. JOURNAL OF ENGINEERING GEOLOGY, 20(6): 926-933.
    Citation: ZENG Sheng, HU Tian, ZHAO Jian, LIN Lin, LI Wei. 2012: FUZZY-AHP METHOD BASED EVALUATION OF ACCUMULATION SLOPE STABILITY. JOURNAL OF ENGINEERING GEOLOGY, 20(6): 926-933.

    基于 Fuzzy-AHP 的堆积体边坡稳定性评价研究

    FUZZY-AHP METHOD BASED EVALUATION OF ACCUMULATION SLOPE STABILITY

    • 摘要: 为快速评价运营期高速公路堆积体边坡稳定性并采取科学的预防性养护对策,在现场调查湖南省多条高速公路堆积体边坡的基础上,考虑评价模型的科学性与公路边坡养护的可操作性,总结现有国内外堆积体边坡研究成果,并根据堆积体边坡的特点选择合理的边坡稳定性指标,建立堆积体边坡稳定性分析的模糊层次分析模型。层次模型由2级5类17项评价指标组成,包括: (1)堆积体结构特征(基岩岩性、接触面特性、碎石含量、堆积体土厚度、堆积体胶结程度); (2)边坡断面特征(坡度、坡高、坡向与岩层产状的关系); (3)水力特征(排水系统、降雨量、地下水); (4)工程防护及绿化(防护结构、加固结构、植被覆盖率); (5)其他因素(边坡破坏历史、地震烈度、开挖方法)。此模型基于模糊数学理论及层次分析方法,通过AHP方法(层次分析法)确定指标权重,然后结合Fuzzy方法(模糊数学方法)计算相对隶属度向量,通过模糊综合评判对堆积体边坡的稳定性进行分析,确定边坡稳定性分级。最后通过工程实例验证了该模型的正确性。结果表明,应用该模型可以使堆积体边坡稳定性评价更全面,更科学合理,更符合公路边坡工程实际。该方法简便可行,结论可靠,具有一定的优越性,可为高速公路边坡养护决策提供有益参考。

       

      Abstract: This paper aims to quickly evaluate the stability of accumulation slope and adopt scientific preventive maintenance countermeasure. It considers the scientific matters of evaluation model and maneuverability of expressway slope maintenance. It summarizes the existing research achievements domestic and abroad about accumulation slope. It then sets up a reasonable accumulation slope stability evaluation index Fuzzy-AHP analysis model. This model is established on the basis of extensive field investigation of accumulation slope disturbed to several expressways in Hunan province. The stability gradation model for accumulation slope stability analysis has been established. The hierarchy model consists of two indexes layers: five main evaluation indexes and 17 basic examination indexes. They are (1) structural characteristics of deposit body (basement lithologic, contact surface character, content of gravel, the thickness of deposit soil, and cementation degree of deposit soil);(2) the section characteristics of accumulation slope (slope gradient, height of slope, the relationship of slope direction and rock stratum occurrence);(3) hydraulic characteristics (drainage system, rainfall, groundwater);(4) engineering protection and vegetation protection(protection structure, reinforcement structure, vegetation coverage)and, (5) other factors (slope failure history, seismic intensity, excavation method). Based on fuzzy math and analytic hierarchy process, the weight of every index is obtained by making use of analytic hierarchy process. The fuzzy math method is used to calculation the relative membership degree vector and to make a comprehensive evaluation of accumulation slope stability. Thus the slope stability classification can be determined. Finally, the application to an engineering example verifies the accuracy and the rationality of the model. Its result is reliable. The results show that the application of this model can make evaluation of accumulation slope stability more scientific, more reasonable, more corresponded to expressway slope engineering practice. This method is simple and feasible. The result is reliable, and has certain superiority to conventional mechanics analysis method. It can provide scientific basis for slope of expressway maintenance decision-making.

       

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