Calculation And Analysis On Temperature Stress Of Roller Compacted Concrete Overflow Dam

That both the structure and material of gravity dams and construction means of earth dams are used in roller compacted concrete dams make them increasingly used in water work. This paper mainly calculates the temperature field and thermal stress during construction and operation of RCC, what' s more , studies the distribution regulation of temperature field and temperature stress field of Baise roller compacted concrete (RCC) overflow dam in Guanxi province using three-dimension finite element floating mesh method. According to differences of construction process, boundary condition, temperature and stress of two schemes extending 3m deep short seam on upstream face in the middle of RCC overflow section and no short seam are calculated, what' s more, in this paper the equivalent line drawing of stable temperature field and unstable temperature field during construction and operation period and the duration curve drawing of typical points' s temperature and stress are plotted, and the results of peak and minimum on temperature in every month and maximum on tensile stress are attained. Analysis of caculation results demonstrates that σx of temperature stress and ensembled stress on upstream face of dam section will reduce after 3m deep short seam is extended on upstream face in the middle of dam section, however σy and σz don't vary. This result offers Science reference for the selection of desination and construction scheme.