复杂地质条件下水库大坝三维渗流研究  

Study on three-dimensional seepage flow of reservoir dam under complex geological conditions

作　　者：张正东[1] 李家财 赵琼 刘雪冬 Zhang Zhengdong;Li Jiacai;Zhao Qiong;Liu Xuedong(Dongpu Dafangying Reservoir Management Office,Hefei 230031,China;Water Conservancy and Hydropower Survey,Design and Research Institute Co.,Ltd.,Hefei 230022,China;School of Civil Engineering and Transportation,Hohai University,Nanjing 210098,China)

机构地区：[1]合肥市董铺大房郢水库管理处,安徽合肥230031 [2]安徽省水利水电勘测设计研究总院有限公司,安徽合肥230022 [3]河海大学土木与交通学院,江苏南京210098

出　　处：《山西建筑》2022年第18期9-12,共4页Shanxi Architecture

基　　金：中央高校基本科研业务费专项资金(资助编号:B210202034,B200204036)。

摘　　要：结合合肥市大房郢水库大坝工程,研究不同库水位条件下大坝渗流场的变化,分析不同地质条件对渗流场的影响,结果表明,大坝渗流场的变化主要受坝基较上层土层的影响,较上层土层的渗透系数较大时,孔隙水压力变化趋势较陡,坝体浸润线较低;较上层土层的渗透系数较小且坝身截面尺寸较小的断面,其坝体浸润线偏高。位于两种土层交界处的测点其孔隙水压力的变化趋势较为连续,无突变异常现象。由于坝体浸润线具有滞后性,实测浸润线高于数值模拟结果。Combined with the dam project of Dafangying Reservoir in Hefei,the changes of the seepage field of the dam under different reservoir water level conditions are studied,and the influence of different geological conditions on the seepage field is analyzed,and the results show that the change of the seepage field of the dam is mainly affected by the upper soil layer of the dam base,and when the permeability coefficient of the upper soil layer is larger,the change trend of pore water pressure is steeper and the infiltration line of the dam body is lower;the infiltration coefficient of the upper soil layer is smaller and the section of the dam body is smaller,and the infiltration line of the dam body is higher.The pore water pressure of the measurement point located at the junction of the two soil layers is relatively continuous,and there is no mutation anomaly.Due to the hysteresis of the wetting line of the dam body,the measured wetting line is higher than the numerical simulation result.

关 键 词：复杂地质 水库大坝 三维有限元 数值模拟 渗流场 

分 类 号：TU352.4[建筑科学—结构工程]