高压引水隧洞混凝土衬砌开裂分析  

Cracking analysis on concrete lining of high-pressure diversion tunnel

作　　者：刘明[1,2] 章青[1,2] 姜亚洲[3] 范颖[2] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [2]河海大学工程力学系,南京210098 [3]河海大学水利水电学院,南京210098

出　　处：《计算机辅助工程》2011年第1期47-49,80,共4页Computer Aided Engineering

基　　金：国家重点基础研究发展计划("九七三"计划)(2007CB714104);国家自然科学基金(10972072);河海大学水文水资源与水利工程科学国家重点实验室专项基金(2009585912)

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.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.

关 键 词：高压引水隧洞 流固耦合 混凝土衬砌 裂缝 等效渗透系数 

分 类 号：TV554.14[水利工程—水利水电工程]