水利水电技术2017，Vol.48Issue(4)：42-46,5.DOI:10.13928/j.cnki.wrahe.2017.04.008
水工隧洞地震作用计算模型的适用性研究
Applicability of calculation model for hydraulic tunnel under seismic effect
摘要
Abstract
Aiming at the calculation of hydraulic tunnel under seismic effect,the calculation comparison and applicability study on the calculation model for hydraulic tunnel under seismic effect are carried out herein.The feasibilities of the applications of four kinds of conventional calculation models to the calculation of hydraulic tunnel under seismic effect are analyzed,the calculating parameters of the radial and tangential reaction spring models are determined through the relevant theoretical and numerical calculations,thus the mode of impact from the calculated soil mass upon the tunnel under seismic effect on the tunnel lining is studied.Combined with the experimental verification,the result from the comparison between this method and the numerical method shows that the normal and tangential resistance coefficients of the surrounding rock are impacted by embedded depth,type of surrounding rock and the different locations of the lining,which are firstly increased along with the increase of the embedded depth,and then tend to constant values,i.e.the better surrounding rock condition is,the larger the values are to be,thus the values from both the sides of the tunnel are larger.Under the seismic effect,the calculated soil mass upon the tunnel impacts the upper part of the tunnel lining with the mode of tangential force,which can be calculated through dividing the calculated soil mass upon the tunnel into soil strips.This method can fully considers the dynamic and confining effects from earthquake on the tunnel,thus is suitable for the seismic calculation of hydraulic tunnel.关键词
水工隧洞/地震作用/计算模型/土层弹簧系数/作用方式Key words
hydraulic tunnel/seismic effect/calculation model/spring coefficient of soil layer/effect mode分类
交通工程引用本文复制引用
李凤稳,孙常新..水工隧洞地震作用计算模型的适用性研究[J].水利水电技术,2017,48(4):42-46,5.基金项目
国家自然科学基金资助项目(51408222 （）
51178490) （）
华北水利水电大学高层次人才科研启动项目 （）
