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

Table 7

Temperature control measures.

Concrete temperature control measures			Control index
Pouring temperature	High restraint zone		≤12°C
	Low restraint zone		≤13°C
	No restraint zone		≤14°C
Simultaneous cooling	Beginning stage of simultaneous cooling		Middle stage
	Height of the simultaneous cooling		18 m below elevation 3,300 m; 27 m above elevation 3,300 m
Distance between water pipes	High restraint zone		1.5 m 1.5 m
	Low restraint zone		1.5 m 3.0 m
	No restraint zone		1.5 m 3.0 m
Water pipe cooling	First stage cooling	Water temperature	8.0°C
		Flow	1.5 m^3·h^−1
		Starting age	0.0 day
		Targeted temperature	19°C-20°C
	Middle stage of cooling	Water temperature	12°C
		Flow	0.8 m^3·h^−1
		Starting age	30day–45 day
		Targeted temperature	16°C–18°C
	Second stage cooling	Water temperature	6°C–8°C
		Flow	1.0 m^3·h^−1
		Starting	≥90 day
		Targeted temperature	10°C
Pouring thickness	High restraint zone		1.5 m
	Low restraint zone and no restraint zone		3.0 m
Intervals between layers			10 day
Surface insulation			5 cm vinyl insulation board