【摘要】 将Matlab模糊逻辑工具箱中图形用户界面GUI与CSMR法相结合建立评价桥基边坡稳定性模糊逻辑推理系统。其步骤为:首先为消除定量参数(如岩石强度指标、岩石质量指标、不连续结构面间距指标及方向修正系数等)取值的离散性,采用连续函数代替离散函数对岩质边坡稳定性分级方法中的参数进行修正取值,然后利用模糊推理系统处理岩质边坡稳定性影响因素所具有的模糊性,其后运用CSMR评价方法对岩质边坡稳定性进行评价。用此推理系统评价石门大桥两岸桥基边坡稳定性并与连续函数修正的CSMR结果相比较,结果表明:石门大桥桥基岩质高边坡岩体质量较好,可利用程度较高,边坡稳定性好,右岸边坡岩体质量略差于左岸;利用有限元软件计算得到左岸边坡稳定性系数为1.98,右岸边坡稳定性系数为0.98,表明将模糊集理论与CSMR评价方法相结合,是评价桥基边坡稳定性的一种有效方法。更多还原

【Abstract】 Graphical user interface(GUI) in Matlab Fuzzy logic Toolbox and the Chinese slope mass rating(CSMR) are used to establish the fuzzy logic inference system for abutment slope stability analysis.In order to decrease the discrete nature of the quantitative parameters values of the CSMR,such as rock strength index,rock quality designation index,discontinuity spacing index and the correction factors of discontinuity direction,continuous functions instead of the discrete functions are used.The fuzzy logic inference is used to consider the fuzziness of rock slope stability factors and CSMR classification is used to evaluate the stability of rock slope.The stability of the Shimen Bridge abutment slope is assessed by the reason system and the results are compared with those by CSMR.Results show that the Shimen bridge has good slope rock quality,high availability degree and good slope stability.Compared the left bank the right bank has worse rock quality.The stability factor calculated by the finite element software for left bank slope and right one are 1.98 and 0.98,respectively.The analysis results show that the fuzzy set theory combined with the CSMR methods is effective to evaluate the abutment slope stability.更多还原