中文摘要：

为研究高压引水隧洞混凝土衬砌开裂问题,根据引水隧洞渗流场和应力场间的耦合作用,将隧洞衬砌作为透水介质;考虑渗透系数与体积应变的关系,建立渗透系数的动态演化模型;根据单裂缝宽度与等效渗透系数的关系确定裂缝开裂位置和裂纹宽度.将该方法应用于某二级水电站高压引水隧洞衬砌开裂分析,结果表明该方法能较好地判断裂缝分布和宽度.

英文摘要：

To study concrete lining crack problems of high-pressure diversion tunnel,taking the lining as permeable material according to the coupling between seepage field and stress field,the dynamic evolution model of permeability coefficient is established considering the relation between permeability coefficient and volumetric strain,and the location and width of cracks are determined according to the relation between single crack width and equivalent permeability coefficient.The method is applied to the lining cracking analysis of high-pressure diversion tunnel of a second stage hydropower station and the result shows that this method is good at determining the distribution and width of cracks.