广义SMP准则在圆形断面隧道围岩渗流解析解的应用  

Application of seepage analytical solution of surrounding rock based on generalized SMP criterion in circular tunnel

作　　者：杨帆 YANG Fan(No.1 Engineering Development Co.,Ltd.of China Railway 14th Bureau Group,Rizhao 276826,Shandong,China)

机构地区：[1]中铁十四局集团第一工程发展有限公司,山东日照276826

出　　处：《隧道与地下工程灾害防治》2022年第4期91-99,共9页Hazard Control in Tunnelling and Underground Engineering

基　　金：中铁建股份有限公司重点研发项目B类课题(2020-B04)。

摘　　要：针对围岩渗透水压力对深埋隧道围岩应力和位移影响尚不明确的情况,采用理论推导和数值计算方法,基于广义空间准滑动面(spatial mobilized plane,SMP)强度屈服准则及非关联流动法则,推导得到考虑渗透水压力的隧道围岩应力和位移弹-脆-塑解析解,并分析渗透水压力和剪胀对隧道围岩位移及应力的影响规律。结果表明:渗透水压力对隧道围岩应力和位移影响较显著,随着渗透水压力增大,隧道各点应力和位移以及塑性区半径都增大,且隧道内外水头差相差越大,应力、位移和塑性区半径变化越大,其中塑性区半径和渗透水压力呈线性正相关。本研究结果对准确确定隧道周边围岩渗透水压力,保证隧道围岩稳定性具有重要意义。Aims at the situation that the influence of the seepage water pressure of the surrounding rock on the stress and displacement of the surrounding rock of the deep-buried tunnel is not clear,based on the spatial mobilized plane(SMP)strength yield criterion and non-correlated flow law,the elastic-brittle-plastic analytical solutions of tunnel surrounding rock stress and displacement under seepage water pressure were derived,and the effect laws of seepage water pressure and shear dilatation on the displacement and stress of tunnel surrounding rock were analyzed.Results showed that,the infiltration water pressure had a significant effect on the stress and displacement of the surrounding rock.With the increase of the infiltration water pressure,the stress and displacement of each point of the tunnel and the radius of the plastic zone increased,and the greater difference between the water head inside and outside the tunnel,the greater change of the stress,displacement and the plastic zone radius,among these,the plastic zone radius and the infiltrating water pressure had a linear positive correlation.The results of this research are of great significance for accurately determining the seepage water pressure of surrounding rock around the tunnel and ensuring the stability of the surrounding rock.

关 键 词：广义SMP准则 非关联流动法则 渗透水压力 圆形断面隧道 

分 类 号：U25[交通运输工程—道路与铁道工程]