考虑渗流场作用的重力坝坝基物理力学参数有限元智能反演分析  

Finite Element Intelligent Inversion of Physical and Mechanical Parameters of Gravity Dam Foundation Considering Seepage Field

作　　者：何晓莹 林潮宁 杜效鹄[3] 袁力 周兴波 刘晓青[1] HE Xiaoying;LIN Chaoning;DU Xiaohu;YUAN Li;ZHOU Xingbo;LIU Xiaoqing(College of Water Conservancy&Hydropower Engineering,Hohai Univ.,Nanjing 210098,China;College of Civil&Transportation Engineering,Hohai Univ.,Nanjing 210098,China;China Renewable Energy Engineering Institute,Beijing 100120,China)

机构地区：[1]河海大学水利水电学院,南京210098 [2]河海大学土木与交通学院,南京210098 [3]水电水利规划设计总院,北京100120

出　　处：《三峡大学学报（自然科学版）》2023年第3期8-13,共6页Journal of China Three Gorges University：Natural Sciences

基　　金：国家重点研发计划(2022YFC3005403);水利部水库大坝安全重点实验室开放研究基金(YK323007);江苏省卓越博士后计划;中国电建集团科技项目(DJ-ZDXM-2021-10)。

摘　　要：针对因不考虑渗流场影响导致对软岩地基上混凝土坝的反演结果出现与工程实际情况不符的问题,本文在有限元计算时考虑坝基渗流场作用,比较不同坝基弹性模量下渗流场对重力坝位移的影响情况;探讨基于灰狼算法的某重力坝坝基弹性模量有限元反演方法的可行性,在重力坝坝基力学参数反演分析中考虑渗流场作用,研究渗流场对反演结果的影响,为科学合理地评价软基上重力坝的安全性提供真实依据.研究结果表明:当坝基为软岩时考虑渗流场作用的反演结果更符合工程实际情况.针对本文的重力坝工程,当其坝基的弹性模量处于3~6 GPa时,建议考虑渗流场的作用;当坝基的弹性模量小于3 GPa时,应考虑渗流场对坝基造成的影响.In view of the problem that the inversion results of concrete dam on soft rock foundation are not consistent with the actual engineering situation due to not considering the influence of seepage field,the seepage field of dam foundation is considered in the finite element calculation.The influence of seepage field on the displacement of gravity dam under different elastic modulus of dam foundation is compared.The feasibility of finite element inversion method for elastic modulus of dam foundation of a gravity dam based on grey wolf algorithm is discussed.The effect of seepage field is considered in the back analysis of mechanical parameters of gravity dam foundation,and the influence of seepage field on the inversion results is studied,which provides a real basis for scientific and reasonable evaluation of the safety of gravity dams on soft foundation.The research results show that when the dam foundation condition is poor,the inversion results considering the effect of seepage field are more consistent with the actual situation of the project.For the gravity dam project in this paper,when the elastic modulus of dam foundation is between 3 GPa and 6 GPa,it is recommended to consider the influence of seepage field on dam foundation.While the elastic modulus of dam foundation is less than 3 GPa,the influence of seepage field on dam foundation must be considered.

关 键 词：软岩地基 反演 渗流场 有限单元法 灰狼算法 

分 类 号：TV642.3[水利工程—水利水电工程]