模糊层次分析法在盾构机型优选中的应用

盾构穿越工程中,选用合适的盾构机型以适应复杂多变的地质条件与施工要求至关重要,但目前多依靠施工经验定性判断。引入定性评价与定量分析相结合的模糊层次分析法（FAHP）,通过建立递阶层次模型、确定模糊一致矩阵、计算指标权重3个步骤进行盾构机型的优选。该方法在宜昌长江盾构穿越中的成功应用表明,建立递阶层次模型是FAHP的关键环节;指标权重仅具有相对意义,用于对比排序,其数值没有实际的物理意义。

Application of Fuzzy Analytical Hierarchy Process (FAHP) in the Optimum Selection of Shield Machine

Selection of the appropriate shield machine to fit complex layers and construction requirements is critical for shield crossing projects while it is finished qualitatively according to construction experience at present.The paper presents that the fuzzy analytical hierarchy process（FAHP） and the optimum selection of shield is done in terms of qualitative evaluation and quantitative calculation by 3 steps which include establishing the hierarchical model,determining the fuzzy consistent matrix and calculating index weights.The successful application of FAHP in Yangtze River shield crossing project in Yichang shows that the essential part of FAHP is the establishment of hierarchical model.The comprehensive index weight whose value has no real physical meaning is only used for comparing and sorting.