基于模糊理论的引水隧洞围岩快速分类研究

Research on rapid classification of surrounding rocks ofdiversion tunnel based on fuzzy theory

为了实现鄂北工程长距离引水隧洞施工期现场围岩快速分类,引进模糊理论构建了围岩快速分类模糊综合评价模型。首先采用层次分析法确定影响因素权重,然后在地质观察和地质素描的基础上,结合室内和现场试验数据,制定单个影响因素分类标准,构造合理隶属函数或赋值隶属度,最后利用软件编程进行模糊逻辑运算,从而实现围岩快速判别。结果表明:该方法减少了人为主观影响,大大缩短了围岩初期支护决策时间,实现了围岩快速分类;工程实践应用及与HC法的比较分析结果验证了该方法的可行性和合理性。

In order to realize the rapid classification of surrounding rock during the construction of long-distance diversion tunnel of North Hubei Water Transfer Project,the fuzzy theory was introduced to build a fuzzy comprehensive evaluation model for rapid classification of surrounding rock.Firstly,AHP was used to determine the weight of influencing factors.Then,on the basis of geological observation and geological sketch,combined with indoor and field test data,the classification standard of single influencing factors was established to construct reasonable affiliation function or assigned affiliation degree.Finally,fuzzy logic operation was used to realize the rapid identification of surrounding rock by software programming.The results showed that this method reduced the subjective influence,greatly shortened the decision time of the initial support of surrounding rock and realized the rapid classification of surrounding rock.The feasibility and rationality of this method were verified by practical application and comparison with HC method.