中文摘要：

本文结合特高拱坝施工期温控防裂的自身特点,从混凝土的真实抗裂能力、大坝水管冷却时的几个关键部位及关键时段,以及影响大坝温度和应力的几个关键因素等几个方面进行深入的分析和全面阐述,提出特高拱坝温控防裂所需要的考虑时、空温控效应的冷却思路与方案。最后,结合我国某特高拱坝施工期的实际温控方案,对比分析了增加中期冷却和增加过渡区后的温控效果,进一步验证了特高拱坝需要采用＂个性化、精细化和信息化＂温控设计理念的必要性和合理性。

英文摘要：

In this paper,in consideration of the self characteristic in temperature control and crack prevention of super-high arch dams,the real ability of concrete against cracking,several key positions and periods of dam cooling,and several key factors influencing the temperature field and stress field are extensively discussed and expatiated;pipe cooling schemes considering the influence of time and space are proposed to meet the need of temperature control and crack preventing for super-high dams.Finally,with the help of a super-high arch dam under construction,a comparison analysis for the temperature control effect is made for three schemes considering the in-situ temperature data,adding a middle cooling and a transition region.The computation results prove that the ‘individuation,elaboration,and informationization’ design method for temperature control is reasonable and necessary.