考虑湿化和流变的沥青混凝土心墙堆石坝安全性评价  

Safety Evaluation of Asphalt Concrete Core Wall Rockfill Dam Considering Wetting and Rheology Deformation

作　　者：张逸超 胡洪林 雷显阳 毛航宇 鲍利发 王柳江[2] ZHANG Yi-chao;HU Hong-lin;LEI Xian-yang;MAO Hang-yu;BAO Li-fa;WANG Liu-jiang(Power China Huadong Engineering Corporation Limited,Hangzhou 311122,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [2]河海大学水利水电学院,江苏南京210098

出　　处：《水电能源科学》2025年第4期147-152,176,共7页Water Resources and Power

基　　金：国家自然科学基金青年科学基金项目(52209160,52009036)。

摘　　要：为评价全风化花岗岩层上沥青混凝土心墙坝的安全性,考虑坝基全风化层及筑坝料的湿化和流变特性,对某抽水蓄能电站下水库沥青混凝土心墙堆石坝开展有限元分析。结果表明,坝体和心墙的应力和变形值均在合理范围内,在全风化层上采用沥青混凝土心墙坝的设计方案是合理可行的;考虑全风化层和筑坝料的湿化和流变变形后,坝体和心墙的应力变形规律更符合工程实际,计算结果可以更加合理地评价大坝安全性;左岸全风化层对左岸心墙与基座接触部位的应力水平、沿岸坡向错动变形有较大影响,建议加强对左岸心墙与基座接触部位的界面错动、心墙应力变形及心墙下游坝基和坝体内部孔压的安全监测。In order to evaluate the safety of the asphalt concrete core wall dam built on the foundation with thick pletely com-weathered granite,the FEM analysis was carried out on the asphalt concrete core wall rockfill dam in the lower reservoir of a pumped storage power station.In this analysis,the wetting and rheological deformation characteristics of the completely weathered granite in the foundation and the rockfill materials were considered.The results show that the distributions of the stress and deformation of the dam body and the core wall are reasonable,and the corresponding values are within a reasonable range,which indicates that it is reasonable and feasible to build the asphalt concrete core wall dam in the area with thick completely weathered granite.Considering the wetting and rheological deformation characteristics of completely weathered granite and the rockfill materials,the deformation of the dam body and core wall is in accord with the observation in the real engineering more,which can evaluate the safety of the dam more reasonably.The completely weathered granite strata on the left bank of the dam have a great impact on the stress level of the asphalt core wall of the left bank,which is near the interface between the core wall and the concrete base.In addition,the dislocation deformation between the core wall and the concrete base along the bank slope direction at this place is influenced remarkably as well.Therefore,it is suggested to strengthen the monitoring of the dislocation deformation between the core wall and the crete con-base near the left bank in the period of operation,as well as the stress and deformation of the core wall,the pore pressure of dam foundation and dam body in the behind of the asphalt core wall at this place.

关 键 词：沥青混凝土心墙坝 全风化花岗岩 湿化 流变 抽水蓄能电站 

分 类 号：TV641.41[水利工程—水利水电工程]