考虑提前蓄水发电的高拱坝最优封拱温度研究  

Research on the optimum joint closure temperature of high arch dam considering impoundment for power generation ahead

作　　者：田斌[1] 彭辉[1] 刘德富[1] 朱文锋[1] 

机构地区：[1]三峡大学水电工程施工与管理湖北省重点实验室,湖北宜昌443002

出　　处：《水力发电学报》2010年第5期39-44,51,共7页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(No.50679036)

摘　　要：温度荷载是拱坝的一项主要荷载,减小温度荷载对拱坝应力及稳定的不利影响直接关系到高拱坝建设的安全性与经济性。本文从拱坝温度荷载影响因素入手,提出优化封拱温度场是减小温度荷载对拱坝不利影响的唯一有效措施,并建立了拱坝封拱温度场多目标优化的数学模型,在研究中考虑了高拱坝施工过程中的分期封拱、提前蓄水发电等施工环节的影响。结果表明,可以通过优化封拱温度场来有效减小温度荷载对高拱坝应力、稳定的的不利影响。在工程实践中须充分考虑高拱坝施工过程中的分期封拱、提前蓄水发电等施工环节对其封拱温度场的影响。Temperature load is a major load on arch dams,and a reduction in its unfavorable influences on the stresses and stabilities of the dam will improve the dam safety and the project benefits.Based on an analysis of temperature load influencing factors,this paper puts forward a concept that optimization of the joint closure temperature fields is the only effective measure of reducing the unfavorable influences.To obtain an optimal measure,a multi-objectives mathematical model is established to study the effects of staged construction procedure of joint closure and the ahead-of-schedule impounding for power generation on the joint closure temperature fields.The results show the effectiveness of the proposed method and the importance of considering construction procedure and impounding condition.

关 键 词：水工结构 封拱温度场优化 施工程序 拱坝 

分 类 号：TV31[水利工程—水工结构工程]