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基于功效系数法的基本原理,在综合考虑青岛地铁实际地质情况的基础上,选取岩石抗压强度、完整系数、软化系数、结构面性态、地下水作为围岩稳定性的评价因素,并采用粗糙集理论确定各指标权重,建立了基于粗集功效系数法的地铁围岩稳定性评价模型。研究表明,稳定性分析结果与实际开挖情况相吻合,运用粗集功效系数法对青岛地铁进行围岩稳定性分析是可行的,为围岩稳定性分析提供一种新思路。
Based on the basic principle of the efficiency coefficient method, considering the actual geological conditions of Qingdao Subway, the compressive strength, integrity coefficient, softening coefficient, structural plane properties of rock and groundwater are selected as the evaluation factors for the stability of surrounding rock. Roughness Set theory to determine the weight of each index, established based on rough set coefficient of effectiveness of the subway surrounding rock stability evaluation model. The results show that the stability analysis results are consistent with the actual excavation situation. It is feasible to use rough set efficiency coefficient method to analyze the surrounding rock stability of Qingdao Metro, which provides a new idea for the stability analysis of surrounding rock.