高沥青混凝土心墙堆石坝施工期温度场研究  

A Study of the Temperature Field in High Rockfill Dams with Asphalt Concrete Core during Construction

作　　者：林川[1] 李同春[2] 程井[1] 赵英华[1] 

机构地区：[1]河海大学水利水电学院,南京210098 [2]水资源高效利用与工程安全国家工程研究中心,南京210098

出　　处：《中国农村水利水电》2014年第11期105-108,共4页China Rural Water and Hydropower

基　　金：国家自然科学基金青年基金项目(51009056);教育部博士点新教师基金项目(20100094120005);水资源与水电工程科学国家重点实验室开放基金项目(2012B103)

摘　　要：在沥青混凝土心墙堆石坝的施工过程中,心墙的沥青混凝土材料由开始摊铺时的160℃左右在很短的时间内下降至周围坝体温度。而沥青混凝土的材料性质对温度极其敏感,研究表明这种影响将随着坝体高度的增加而显著提高。结合实际工程,基于有限单元法建立了沥青混凝土心墙堆石坝典型剖面二维有限元模型,考虑施工过程对坝体温度场进行仿真分析,得到不同时期坝体剖面的温度分布情况。并对心墙底部6m范围内的坝体进行细化研究,验证了相关监测资料中提到的心墙沥青混凝土材料反复温升的现象。During the construction process of rockfill dams with asphalt concrete core ,the asphalt concrete is paved at around 160 ℃which drops to the temperature around the dam during a very short period .Studies have shown that material properties of asphalt concrete is extremely sensitive to temperature variation ,and the impact will rise significantly with the increase in dam height .Combined with practical projects ,this paper establishes a typical sectional model of the asphalt concrete core dam based on the 2D finite element method ,and concludes the temperature distribution of this dam section in different periods considering the effects of construction process on dam temperature .The phenomenon shown by monitoring data that asphalt concrete temperature rises repeatedly is validated by this paper by establishing a 6-meters-high refined model at the bottom of the core .

关 键 词：沥青混凝土心墙 堆石坝 施工仿真 温度场 

分 类 号：TV223.22[水利工程—水工结构工程]