摘要
以某枢纽工程面板砂砾石坝为研究对象,采用三维有限元分析技术,建立计算网格模型、给定计算条件以及设置工况,研究该工程在正常运行以及周边缝止水失效情形的三维渗流性态,分析其水头分布、各部位渗透坡降以及不同区域渗流量等渗流要素及变化情况,指导工程施工。结果表明,正常运行下,设计渗控措施能够有效阻断渗流,确保大坝渗流安全,但周边缝止水失效时坝体渗流量急剧增加,面板后的垫层渗透坡降大幅增大,影响大坝的正常运行,并易导致坝体破坏。
Taking the sandstone gravel dam of a certain pivot project as the research object,this paper uses the three-dimensional finite element analysis technology to establish the computational grid model,the given calculation conditions and the set working conditions,and studies the three-dimensional seepage of the project in normal operation and the surrounding water stop failure.The paper analyzes its water head distribution,the percolation slope of each part and the seepage flow and other changes in seepage flow in different areas,and guides the construction of the project.The results show that under normal operation,the design of seepage control measures can effectively block the seepage and ensure the seepage safety of the dam.However,when the surrounding seam stops,the seepage flow of the dam increases sharply,and the osmotic slope of the cushion behind the panel increases greatly.The seepage flow of the dam increases from 17.21 L/s to 126.02 L/s with the panel,and the osmosis slope of the special cushion increases from 0.35 to 10.89,which affects the normal operation of the dam and easily leads to the destruction of the dam.
作者
颜猛
陈守开
张政男
YAN Meng;CHEN Shou-kai;ZHANG Zheng-nan(Henan Water Conservancy First Engineering Bureau, Zhengzhou 751200, China;School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;Henan Key Laboratory of Water Environment Simulation and Treatment, Zhengzhou 450045, China)
出处
《中国农村水利水电》
北大核心
2019年第12期145-149,154,共6页
China Rural Water and Hydropower
基金
国家自然科学青年基金项目(51309101)
国家自然科学基金面上项目(51679092)
河南省产学研合作项目(182107000031)
关键词
高面板砂砾石坝
仿真分析
止水失效
渗流量
渗透坡降
high-panel gravel dam
simulation analysis
water stop failure
seepage flow
seepage slope
