模糊择近原则在隧洞围岩分类中的应用

Application of Principle of Fuzzy Closeness Optimization to Classification of Surrounding Rock in Tunnel

对国内外经常使用的围岩稳定性分类方法作了分析讨论.在多因素分类法的基础上,引进模糊理论.由于各因素对最终指标的影响程度不同,应乘以不同的权重系数.根据围岩地质条件,确定岩土的质量分类情况,引入贴近度及择近原则,建立围岩模糊分类法,给出确切的围岩分类.通过实例说明所建立的围岩模糊分类法是一种计算简便、应用灵活、行之有效的分类法.

Several applicable methods of the stability classification of surrounding rock are discussed. Based on multi-factor taxonomy, the fuzzy theory is introduced into the classification. Because these factors have different effects on the final indices, they should be multiplied by different weighting coefficients. According to the grasped information on the geological conditions of surrounding rock, the concept of closeness and the principle of closeness optimization are introduced in to set up the fuzzy classification of rock mass so as to classify more exactly. An example is given to illustrate that the fuzzy classification is simple in computation, flexible in application and effective in practice.