ngwascarriedoutcontinuouslyforthepurposeofimprovingtheconcretestressintheimmediatevicinityofthecoolingpipes,acceleratingcoolingoftheblock,forrenderingthejointsbetweencolumnsmonolithicandimprovingreliableperformanceofthecoolingcoils(leaching).ThesecondstageusuallystartsattheendofAugustwithawatertemperatureof-.Duringthisperiodtheconcreteiscooledmainlyfromatemperatureabove-,forthepurposeoffurtherreducingthetemperaturetowardsthewinterseasonandinpreparationforcooLinginwinterwithwateratatemperatureof.-.BeginninginNovember,coolingisstartedonthewholeremainingconcretemassdirectlypreparedforgroutingtheconstructionjoints(temperatureoftheblocksintheorderof-).Thetimesforcoolingthezonesamgovernedbytheseparationsbetweenthepipesandcoilsinthegivenzone.Hence,theuseofcoilswithdifferentpipespacingsontheonezoneisundesirableunlessthisisnecessaryforobservingthetemperatureconditions.Inordertoobs土拌合温度可以保持在低于到度而没有困难。
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