论文部分内容阅读
针对现有隧道围岩质量分级方法评价结果存在非一致性问题的特点,首先引入组合评价思想,选取多种已有围岩质量分级方法作为基础分级方法,建立了融合各基础分级方法优越性的隧道围岩质量分级组合评价计算模型;其次,依据不同基础分级方法评价指标的物理意义和量纲不同的特点,建立了评价指标的标准化方法,使不同基础分级方法评价结果具有可比性,以解决组合评价计算模型的组合计算方法问题;然后,针对不同基础分级方法评价结果的合理性存在差异的特点,引入漂移度概念,建立了基础分级方法合理程度的度量方法,并在此基础上,提出基础分级方法权重分配的合理确定方法,进而建立了隧道围岩质量分级的新型组合评价方法,该方法不仅可以解决不同基础分级方法评价结果的非一致性问题,更重要的是可以充分发挥各基础分级方法的优势,避免它们的不合理性,使隧道围岩质量分级更为合理;最后,通过工程实例分析,表明了该方法的合理性与可行性。
Aiming at the characteristics of non-uniformity of evaluation results of surrounding rock mass classification method of existing tunnels, firstly, the idea of combined evaluation is introduced and several existing methods of mass classification of surrounding rock are selected as the basic classification methods to establish the superiority of fusion of each basic classification method Secondly, based on the physical meaning and dimension of different evaluation indexes, the standardization method of evaluation index is established, and the evaluation results of different basic classification methods are comparable to solve the problem Then, in view of the difference of rationality of evaluation results of different basic grading methods, this paper introduces the concept of drift degree and establishes a reasonable measure method of basic grading method. On the basis of this, And then establish a new combined evaluation method for the quality classification of tunnel surrounding rock. This method can not only solve the inconsistency problem of evaluation results of different basic classification methods, but more importantly, can give full play to each foundation The advantages of grading methods to avoid them are not Reason, the tunnel surrounding rock quality classification more reasonable; Finally, the case study project, indicating the rationality and feasibility of the method.