凤亭河水库黏土心墙坝库水位变动渗流特性分析  

Analysis of Seepage Characteristics of Clay Core Wall Dam under the Conditions of Reservoir Water Level Variation in Fengting River Reservoir

作　　者：李林 冯明珲[2,3,4] 朱化鹏 何令祖 郁舒阳 马明瑞 LI Lin;FENG Minghui;ZHU Huapeng;HE Lingzu;YU Shuyang;MA Mingrui(Guangxi Hydropower Research Institute, Nanning 530023, China;China Institute of Water Resources andHydropower Research, Beijing 100038, China;State Key Laboratory of Simulation and Regulation of WaterCycle in River Basin, Beijing 100038, China;Key Laboratory of Water Conservancy Construction andSafety of Ministry of Water Resources, Beijing 100038, China;Beijing Dingchuanliwei Technology Co., Ltd.,Beijing 100085, China;School of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, China)

机构地区：[1]广西水利科学研究院,广西南宁530023 [2]中国水利水电科学研究院,北京100038 [3]流域水循环模拟与调控国家重点实验室,北京100038 [4]水利部水工程建设与安全重点实验室,北京100038 [5]北京鼎创力维科技有限公司,北京100085 [6]河海大学水利水电学院,江苏南京210098

出　　处：《华北水利水电大学学报（自然科学版）》2019年第3期72-78,共7页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：广西水利厅科技项目(201614,201219)

摘　　要：为研究库水位变动情况下凤亭河水库黏土心墙坝的渗透稳定性规律,根据非饱和渗流原理,利用Geostudio软件进行了数值模拟,得到了不同工况下坝体内部的浸润线变化情况、渗漏量以及上下游坝坡的稳定性规律,并对工程的防渗墙长度进行了优化。结果表明:库水位水平越低,浸润线也越低;库水位骤降时,心墙处的浸润线有一个“延缓下降”的效应;库水位水平越高,渗漏量越大,防渗墙深度越深,相同情况下的渗漏量越小;库水位水平越低,上游坝坡安全系数越低,而下游坝坡安全系数越高,防渗墙深度对下游坝坡安全系数大小的敏感性要大于上游坝坡;库水位骤降时,上游坝坡安全系数先减小、后增大,最后保持不变,而下游坝坡安全系数持续增大;根据凤亭河水库黏土心墙坝渗透稳定性计算结果,建议凤亭河水库黏土心墙坝防渗墙深度取为50m。In order to study the seepage stability law of the clay core wall dam of Fengting River reservoir under the condition of reservoir water level variation, according to the principle of unsaturated seepage, the numerical simulation was carried out by using Geostudio software, and the variation of the seepage line inside the dam body, the seepage amount and the stability of upstream and downstream dam slope under different working conditions were obtained, and the depth of the impervious wall was optimized. The results show that the lower the water level of the reservoir, the lower the infiltration line. When the reservoir water level drops suddenly, the infiltration line at the core wall has the effect of "delaying the decline". The higher the water level of the reservoir is, the greater the leakage is, the deeper the seepage wall depth is, the smaller the leakage is under the same conditions. The lower the reservoir water level is, the lower the safety factor of upstream dam slope is, yet the higher the safety factor of downstream dam slope is, and the sensitivity of the depth of impervious wall to the safety factor of downstream dam slope is greater than that of upstream dam slope. When the reservoir water level drops suddenly, the safety factor of the upstream dam slope decreases first, then increases, and finally remains unchanged, while the safety factor of the downstream dam slope continues to increase. According to the calculation results of the seepage stability of the clay core wall dam of Fengting Reservoir, it is suggested that the depth of the impervious wall of the Fengting River clay core wall dam should be 50 m.

关 键 词：凤亭河水库 黏土心墙坝 库水位变动 渗透稳定 防渗措施 

分 类 号：TV223.4[水利工程—水工结构工程]