基于模糊物元地铁隧道围岩稳定性研究.doc

基于模糊物元地铁隧道围岩稳定性研究 　　摘要：在对地铁隧道的围岩稳定性进行综合研究时，把地铁隧道的围岩稳定状况作为物元的事物,以其中的各指标及其相应的模糊量值构造模糊复合物元，通过相关计算，实现对地铁隧道围岩的相关研究。通过岩体基本质量指标、围岩弹性纵波速度、岩石饱和单轴抗压强度、岩体的完整性系数、结构面强度系数和地下水情况等6个方面对地铁隧道岩体的稳定性进行研究.根据地铁隧道围岩的特点，在模糊物元分析原理的基础上，使用层次分析法进行定量分析，熵值法进行定性分析，完成对地铁隧道的围岩稳定性的研究.该模型被应用到郑州地铁隧道围岩稳定性的研究中，通过计算，此地铁隧道的岩体为稳定性差的岩体，与实际情况相符，表明评价指标体系和方法行之有效. 　　关键词：地铁隧道；模糊物元；围岩；稳定性 　　中图分类号：U45 文献标识码： A 　　Abstract: Fuzzy matter element model is utilized to comprehensively study on the stability of surrounding rock of metro tunnel. The stability condition of surrounding rock masses of metro tunnel are regarded as the objects of matter element and their every index for study as well as the corresponding fuzzy values are used to build up the composite fuzzy matter elements. By calculating the relevancy the comprehensive evaluation, the stability of surrounding rock masses of metro tunnel can be carried out. The six indexes are used to study on the stability of surrounding rock of metro tunnel, such as the quality of the rock mass by rock mass quality index , elastic P-wave velocity of the rock , saturated uniaxial compression strength of the rock , the integrity of mass coefficient of the rock ,structural surface intensity coefficient of the rock , groundwater conditions. Then,based on the characteristics of surrounding rock of a metro tunnel and fuzzy matter element analysis theory, the concept of analytic hierarchy process is introduced to qualitative analysis and the concept of information entropy is introduced to quantitative analysis. The three methods are used to study on the stability of surrounding rock of metro tunnel. At last, fuzzy matter element model is applied to analyze the stability of surrounding rock of a metro tunnel. By calculating， the subway tunnel rock mass is the poor stability of the rock mass and in line with the actual situation. The application shows that the model is effective and practical. 　　Key words: Metro tunnel; fuzzy matter element; surrounding rock; stability 　　0 引言