摘要
为了提高水工隧洞施工安全评价结果的可靠性,选取岩石质量指标、湿抗压强度、完整性系数、结构面强度系数、地下水渗水量5个因素作为评价指标,运用改进重要度的粗糙集计算客观权重,选取可拓云模型充分考虑以往围岩评价过程中由于等级分界与数据获取存在的不确定性,构建了基于RS(粗糙集)-可拓云模型的水工隧洞围岩安全评价方法,并将该方法应用于某水工隧洞中的12段围岩中。结果表明,改进重要度的粗糙集计算的权重,既能满足所得权重的客观性,也能保证评估结果具有一定的解释性,基于RS-可拓云模型对于水工隧洞围岩安全等级的确定较为有效,通过该方法得出的隧洞围岩安全等级与实际情况一致。研究成果为水工隧洞围岩安全评价提供了一定的参考。
In order to improve the reliability of the safety evaluation results of hydraulic tunnel construction,choosing rock quality index,wet pressure strength,integrity coefficient,structural surface strength coefficient and groundwater seepage water seepage as evaluation index,the objective weight is calculated by using the rough set based improved importance.Taking fully account of the uncertainty in the evaluation process of the previous surrounding rock due to the classification and data acquisition,the extensional cloud model is used to establish rough set-extensional cloud model of safety evaluation of hydraulic tunnel surrounding rock.The model is applied to Section 12 in a certain hydraulic tunnel surrounding rock.The results show that the weight by the improved important degree rough set can not only satisfy the objectivity of the gained weight,but also ensure that the evaluation results have certain explanatory.The extensional model is more effective for determining the safety level of hydraulic tunnel surrounding rock.The safety level of the tunnel surrounding rock obtained by this method is consistent with the actual situation.The research results can provide reference for the safety evaluation of hydraulic tunnel surrounding rock.
作者
贺思乐
靳春玲
祁英弟
路瑞琴
李燕
HE Si-le;JIN Chun-ling;QI Ying-di;LU Rui-qin;LI Yan(College of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Water Transfer Engineering and Water Safety Research Institute,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《水电能源科学》
北大核心
2020年第7期138-141,共4页
Water Resources and Power
基金
国家自然科学基金项目(51669010,51669011)。
关键词
水工隧洞围岩
围岩安全评价
可拓云模型
改进的粗糙集
hydraulic tunnel surrounding
rock safety evaluation
extension cloud model
improved rough set
作者简介
贺思乐(1993-),男,硕士研究生,研究方向为水环境及渠系工程安全评价.E-mail:929637699@qq.com;通讯作者:靳春玲(1976-).女,教授,研究方向为水安全及水利工程项目管理,E-mail:jinChunling@mail.lzjtu.cn。
