A Project Of Temperature Control For RCC Gravity Dam Construction

RCC gravity dam because of its own characteristics,its temperature,stress issues more prominent.The simulation calculation of temperature field and stress field is not only related to concrete structure form,local climate,construction process,material properties and operation conditions,but also an important method of temperature research and control.If not handled well,there will be a risk of dam failure,causing harm to the lives and property of residents.Aiming at a RCC gravity dam,this paper takes ANSYS software as the analysis platform and adopts the three-dimensional finite element method according to the heat conduction theory to carry out the simulation calculation of the temperature field and stress field during the construction period and operation period of the three schemes of high-temperature seasonal shutdown and non-shutdown in the high-temperature season.This paper mainly studies th,e natural storehouse entry,controlling the pouring temperature,water cooling measures and reasonably adjusting the construction schedule of the dam.In this paper,the methods of cooling the water and changing the temperature of warehousing are studied in depth and systematically,and three schemes are proposed.The results show that:(1)The maximum temperature in the strong constraint zone of scheme 1 and 2 is slightly higher than the allowable maximum temperature,and the maximum temperature in scheme 3 is the same as the allowable maximum temperature.The maximum temperature in the weak constraint region of the foundation of scheme 1 and 2 is greater tharn the allowable maximum temperature,and that of scheme 3 is less than the allowable maximum temperature.(2)In programs 1 and 3,the maximum temperature stress of RCC,RCC,RCC,unconfined RCC,and normal concrete in the strong constraint area of foundation,is less than the allowable tensile stress of concrete at 90 days.In plan 2,the maximum temperature stress of roller compacted concrete in the strong constraint area of foundation,the maximum temperature stress of roller compacted concrete in the weak constraint area of foundation and the normal concrete in overflow area is all less than the allowable tensile stress of concrete at 90 days' age,and the maximum temperature stress in the unrestrained area of dam body is greater than the allowable...