摘要
重力坝坝基岩体中包含软弱结构面和性质复杂、方向各异的裂隙,在外力作用下易形成滑移通路,导致大坝稳定性遭到破坏,对人民生命财产安全造成严重威胁。本文以白石水库重力坝溢流坝段为例,采用弹塑性有限元强度折减法,通过ANSYS有限元软件对渗流应力耦合作用下抗滑稳定安全系数和坝基坝体应力应变进行研究,进而分析渗流应力耦合作用对重力坝深层抗滑稳定的影响。研究表明:渗流应力耦合场作用下重力坝抗滑稳定安全系数小于单一应力场;渗流应力耦合场作用下,白石水库重力坝抗滑稳定安全系数为2.4。研究成果可为重力坝深层抗滑稳定数值模拟提供工程依据,具有重要的现实意义。
Gravity dam foundation rock mass contains weak structural plane and cracks with complicated properties and different directions. Glide paths can be easily formed under the effect of external force, thereby damaging dam stability and seriously threatening peoples life and property safety. In the paper, gravity dam overflow dam section of Baishi Reservoir is adopted as an example, elastic-plastic finite element strength reduction method is adopted, ANSYS finite element software is applied for studying the anti-sliding safety coefficient dam foundation and dam stress strain under seepage stress coupling effect, thereby analyzing the influence of seepage stress coupling effect on gravity dam deep anti-sliding stability. The study shows that the gravity dam anti-sliding stability safety coefficient under seepage stress coupling field effect is smaller than single stress field. The anti-sliding stability safety coefficient of Baishi Reservoir gravity dam is 2.4 under the seepage stress coupling effect. The research result can provide engineering basis for gravity deep anti-sliding stability numberical stimulation with important realistic significance.
作者
曹娜
CAO Na(Fuxin County Linghe Pretection Zone Administration, Fuxin 123100, China)
出处
《中国水能及电气化》
2017年第8期37-41,共5页
China Water Power & Electrification
关键词
重力坝
深层抗滑稳定
分析
gravity dam
deep anti-sliding stability
analysis
