岩溶地区地下坝堵洞体三维有限元数值模拟  

Three-Dimensional Finite Element Numerical Simulation of Cave Block of Underground Dam in Karst Area

作　　者：达明昌 焦洁 苏正洋 DA Mingchang;JIAO Jie;SU Zhengyang(Qinghai Provincial Water Resources Department,Xining 810001,China;Hohai University Design and Research Institute Co.,Ltd.,Nanjing 210098,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China)

机构地区：[1]青海省水利厅,青海西宁810001 [2]河海大学设计研究院有限公司,江苏南京210098 [3]南京水利科学研究院,江苏南京210029

出　　处：《人民珠江》2020年第9期39-45,共7页Pearl River

基　　金：国家重点研发计划(2018YFC0407105、2016YFC0401603);国家自然科学基金面上项目(51679151、51779154)。

摘　　要：岩溶地区地下水库工程因结构和所处环境特殊,其安全管理及风险评价往往存在较多难题。以中国西南地区某典型岩溶型地下水库工程为研究对象,通过建立该工程堵洞体的三维有限元模型,分析其在不同荷载工况组合下温度场、应力场、位移场变化规律。结果表明:堵洞体总体变形较小,各工况下堵洞体应力水平整体在安全范围以内,在堵洞体与基岩接触局部位置存在应力集中现象,但整体应力分布满足规范要求。该研究成果为当前岩溶地区地下水库工程的安全评价和风险分析提供参考依据。There are many problems in safety management and risk assessment of underground reservoir project in karst area because of the special structure and environment.Taking a typical karst underground reservoir project in southwest China as the research object,this paper establishes the three-dimensional finite element model of its cave block to analyze the variation law of its temperature field,stress field and displacement field under different working conditions.The results show that:the overall deformation of the cave block was small,and the stress level of the cave block was generally within the safe range under various working conditions.There was stress concentration at the local position between the cave block and bedrock,but the overall stress distribution met the requirements of the code.The research results serve as a reference for safety evaluation and risk analysis of underground reservoir projects in karst areas.

关 键 词：岩溶地下坝 堵洞体 有限元模拟 应力位移分析 

分 类 号：TV322[水利工程—水工结构工程]