期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2020
卷号：510
期号：5
页码：1-7
DOI：10.1088/1755-1315/510/5/052084
语种：English
出版社：IOP Publishing
摘要：Currently, for several super-high arch dams under construction which have caused a series of issues after being strict with temperature control standards, this paper has a sensitivity analysis through a variety of programs and a systematic study about the impact which the highest temperature, the cooling height, the same cooling zone height and other key factors have on the temperature stress of the construction period dam, and then proposes that the temperature control standard and the selection of measures of the ultra-high arch dam are relatively stricter than the regulatory requirements of the traditional dam as long as we have a reasonable control about the temperature drop on the time domain and the temperature gradient on the spatial domain. However we need not make all the dams as a constraint zone to have a temperature stress control. After separated from the basis constraints zone, the maximum temperature of the dam can increase 3-4 °C at least. In addition, while the dam's same cooling zone height is controlled by the 0.2L (L for the bottom width), it can meet the requirements for filling and anti-cracking without using two cooling areas. This finding will help reduce the difficulty of height control of the cantilever when the dam is under construction.
