亭子口水电站上闸首应力变形与抗滑稳定静动力分析研究  

Research on the Static & Dynamic Analysis of Stress-deformation and Anti-sliding Stability of the Upper Lock Head of Tingzikou Hydropower Station

作　　者：陈灯红[1] 彭刚[2] 杜成斌[1] 王晓亮 

机构地区：[1]河海大学工程力学系,江苏南京210098 [2]三峡大学土木水电学院,湖北宜昌443002

出　　处：《水力发电》2009年第5期93-95,共3页Water Power

基　　金：973课题子题“高混凝土坝在地震荷载作用下的溃坝研究”(2007CB714104);中国水利水电科学研究院开放研究基金(2008538613)

摘　　要：亭子口水电站上闸首坝基地质条件复杂,已查明至少含有6层控制性软岩层,其强度较低、分布面积较大,构成了上闸首可能发生深层滑动的地质背景。分别采用三维线弹性、平面非线性有限元法研究了上闸首的应力变形及抗滑稳定性。采用不同的屈服准则,分别运用应力代数和法和强度折减法计算建基面及各软岩层的抗滑稳定安全系数。结果表明,上闸首在静动力作用下其应力变形值均在合理的范围内,其深层抗滑稳定性是有保证的;采用强度折减法计算时,相同工况下采用DP1模型计算的强度折减系数比采用DP4模型的要大16%左右,但塑性区的发展过程相差不大。The geological conditions of the upper lock head foundation of Tingzikou hydropower station are very complex. It contains at least six-layer control soft rocks with low strength and large distribution area, which forms the geological conditions of potential deep sliding of upper lock head. The stress-deformation and anti-sliding stability of upper lock head were studied by 3D linear elasticity and plane non-linear FEM. According to different yielding criterions, the anti-sliding stability safety factors of the construction foundation surface and various soft rock layers were calculated by stress algebraic sum method and strength reduction method respectively. The results indicated that： the stress-deformation values of upper lock head under the actions of static and dynamic loads are within a reasonable range and its deep anti-sliding stability was guaranteed. When the strength reduction method is used, the strength reduction factors of DP1 model are greater about 16% than that by DP4 model under the same conditions. But the development process of plastic zone is not different.

关 键 词：上闸首 抗滑稳定 强度折减法 静动力分析 破坏准则 

分 类 号：U641.31[交通运输工程—船舶及航道工程]