Sensitivity Analysis of Temperature Control Parameters and Study of the Simultaneous Cooling Zone during Dam Construction in High-Altitude Regions

Table 3

Concrete temperature stress as affected by the pouring season.

Starting season	Pouring temperature (°C)	Water temperature; (°C)			Intervals (day)	Maximum temperature in the high restraint zone (°C)	Maximum tensile stress in the high restraint zone
		First stage	Middle Stage	Second Stage			(Mpa)	Elevation; (m)	Safety coefficient
Summer	≤12	8	12	7	10	26.3	1.45	3263.0	1.74
Autumn	≤12	8	12	7	10	25.5	1.63	3264.5	1.55
Winter	≥6	8	12	7	10	24.5	1.05	3264.5	2.41

Note. (1) is the along-river stress, and (2) is the safety coefficient. Strength control is designed based on 180 days; the tensile strength of third-grade concrete is 2.53 Mpa, whereas that of fourth-grade concrete is 2.73 Mpa. The same data are presented in Figure 3.