基于模糊综合评价的高填方边坡稳定性研究

发布时间：2018-04-01 11:30

本文选题：高填方边坡　切入点：稳定性评价　出处：《西南科技大学》2015年硕士论文

【摘要】：本文以绵阳党校高填方边坡为研究出发点,在充分理解边坡工程具模糊不确定性本质及模糊数学的基本原理基础上,提出采用不确定性的方法——模糊综合评价法来评价高填方边坡的稳定性,并建立针对高填方边坡稳定性的模糊综合评价统一模型。通过对高填方边坡的变形机理、破坏模式、稳定性影响因素以及影响因素中填方体物理力学指标对高填方边坡稳定性影响的敏感程度分析,选取11个边坡稳定性因素建立高填方边坡模糊综合评价统一模型。根据最大隶属度原则,对定量因素选择岭形分布的隶属函数,定性因素运用梯形分布的隶属函数,采用层次分析法确定各作用因素的权重值。最后采用高填方边坡稳定性模糊综合评价模型评价高填方边坡的稳定性等级。利用新评价模型与传统的评价方法——极限平衡法、数值模拟法对绵阳党校高填方边坡的稳定性分别进行评价,将三种评价方法所得结果进行对比分析得出:高填方边坡稳定性评价采用模糊综合评价方法更为简洁、方便,结果与边坡实际状态更为接近,对同类高填方边坡的稳定性评价具有参考价值。
[Abstract]:This paper takes the high fill slope of Mianyang Party School as the starting point and fully understands the nature of fuzzy uncertainty and the basic principle of fuzzy mathematics in slope engineering. A fuzzy comprehensive evaluation method is proposed to evaluate the stability of high fill slope, and a unified fuzzy comprehensive evaluation model for the stability of high fill slope is established. Through the deformation mechanism of high fill slope, the failure mode is established. The influence factors of stability and the sensitivity of the physical and mechanical indexes of filling body to the stability of high fill slope are analyzed. The fuzzy comprehensive evaluation model of high fill slope is established by selecting 11 slope stability factors. According to the principle of maximum membership degree, the membership function of ridge distribution is selected for quantitative factors, and the membership function of trapezoid distribution is used for qualitative factors. The weight of each factor is determined by analytic hierarchy process (AHP). Finally, the fuzzy comprehensive evaluation model of high fill slope stability is used to evaluate the stability grade of high fill slope. The new evaluation model and the traditional evaluation method-limit equilibrium method are used to evaluate the stability of high fill slope. The stability of the high fill slope of Mianyang Party School is evaluated by numerical simulation method. The results obtained from the three evaluation methods are compared and analyzed. The results show that the fuzzy comprehensive evaluation method is more simple and convenient to evaluate the stability of the high fill slope. The results are closer to the actual state of the slope and have reference value for the stability evaluation of the similar high fill slope.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU43

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