渗流场与应力场耦合作用下截渗墙位移应力分析  

Analysis of displacement and stress of cutoff wall under action of filtration field and stress field

作　　者：周建国[1] 李淼[2] 舒华[1] 

机构地区：[1]中南勘测设计研究院,湖南长沙410014 [2]长沙理工大学,湖南长沙410076

出　　处：《东北水利水电》2007年第9期6-8,共3页Water Resources & Hydropower of Northeast China

摘　　要：根据某平原水库的蓄水过程和地质结构特点,建立了渗流场与应力场耦合计算模型,采用有限元方法进行了稳定渗流场和应力场的耦合作用下截渗墙部位的位移、应力分析。计算分析表明,考虑耦合作用之后,土体渗透系数平均降低10%左右;截渗墙顶部水平位移由指向上游侧变化为指向下游侧,截渗墙部位的最大第一主应力σ1增加约27.8%,最大第三主应力σ3增加约16%。因此,考虑虑渗流场和应力场耦合作用所得的计算结果对截渗墙稳定运行不利。截渗墙;渗流场;应力场;The filtration field and stress field coupling calculation model is established according to storage process of plain reservoir and geologic structure characteristics. The analysis of stress and displacement in the cutoff wall under coupling action of filtration field and stress field with the finite element method is conducted. The result indicates that the permeability coefficient of soil mass reduces of 10%. The horizontal displacement of cutoff wall top varies from directional upstream to directional downstream. The primary maximum principal stress σ1 of cutoff wall increases of 27.8% , the tertiary muximum principal stressσ3 increases of 16%,therefore,the calculation result under coupling action of filtration field and stress field is unfavourable to the stability of cutoff wall.

关 键 词：三峡船闸 高边坡 地下排水 

分 类 号：TV223.42[水利工程—水工结构工程]