流固耦合作用下引洮7～#隧洞开挖过程中的数值模拟分析  

Numerical model analysis of Yintao 7# tunnel excavation process under fluid-solid coupling

作　　者：赵琨[1] 许健[1] 任伯锋 靳聪聪[2] 

机构地区：[1]甘肃农业大学工学院,甘肃兰州730070 [2]华北水利水电大学水利学院,河南郑州450011

出　　处：《甘肃农业大学学报》2015年第3期165-170,177,共7页Journal of Gansu Agricultural University

基　　金：甘肃引洮供水一期总干渠7#;9#隧洞TBM施工定额研究项目(041031067)

摘　　要：以甘肃历史上最大的水利工程引洮供水工程一期总干渠7#隧洞为工程背景,在考虑应力场与渗流场耦合作用下,利用ABAQUS有限元程序,建立有限元渗流模型,对隧洞埋深在200m处的含水疏松砂岩地段的围岩开挖过程进行模拟分析,得出引洮7#隧洞在开挖过程中围岩径向变形规律与特征,径向正应力、孔隙压力分布及变化规律,为隧洞的早日贯通及正常运营提供技术支持,对保证工程安全和节省投资具有积极意义.Based on the largest hydraulic engineering in the history of Gansu Province,the first phase water supply of the Yintao project in 7#tunnel of the main canal as the research background.The finite element seepage model is established.Under the coupling of seepage and stress,analysis of the excavation process in hydrous unconsolidated sandstone of surrounding rock by using the ABAQUS finite element program.To draw radial normal stress and pore pressure distributions and the deformation characteristics of surrounding rock in tunnel excavation process,in order to the tunnel breakthrough as soon as possible and normal operation to provide technical support.It is significance ensure the safety of engineering and save investment.

关 键 词：引水隧洞 有效应力原理 流固耦合 隧洞开挖 引洮工程 

分 类 号：TV672.1[水利工程—水利水电工程]