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Turbine base plate temperature control of mass concrete


See layout of the probe, each in the base, middle and lower parts, each with a probe of electronic thermometer thermocouple temperature measurements inside and outside of concrete, to acquire all parts of the temperature. Hand to measure time,mbt chaussures paris, and make records. Temperature schedule :1-3d, measured once every 2 hours; 4-lOd, measured once every 4 hours; 11-30d,birkenstock paris, measured once every 8 hours. Found time to take temperature exceeds 25 ℃ insulation measures. Turbine base plate temperature sensor layout shown in Figure 1. Figure l turbine base plate temperature probe layout Figure 2 for a time temperature graph (1) Keming Jun: turbine base plate 516 temperature control of mass concrete) concrete temperature according to temperature data collated results temperature one time plotted in Figure 2, the isotherms in Figure 3. Marina 31 4 days, the temperature reached the highest value, the maximum temperature difference is, this stage is temperature controlled by a critical moment. Therefore, we must take the following preventive measures: a, to strengthen conservation in order to ensure the concrete surface moisture. b, cover the concrete surface layer insulation film plus two-story sacks. So that the concrete surface to reduce heat exchange coefficient,abercrombie pas cher, to prevent the concrete cracks. Several stages from the measured data and the isothermal map shows that the measured average temperature of 27 ℃, the highest center temperature 58.5E, gradually reduce the external surface, the surface maximum temperature 33.5E, the center temperature of each measuring point and the surface temperature difference no more than 25 ℃, temperature control measures to meet the requirements. 4 summarizes the results of that practice,abercrombie paris ouverture, mass concrete construction, if the thermal stress analysis by using an effective temperature control measures, especially in the first three days to strengthen the conservation and conservation of temperature measurement and control, to keep the concrete surface temperature difference of not more than 25 * (2, to prevent excessive thermal stress of concrete, the concrete temperature to eliminate cracks, thus ensuring the quality of mass concrete construction, so the temperature control measures taken is feasible and effective. [References] [1] Xu Zhilun. Elasticity [M]. Beijing: Higher Education Press ,1998,161-237 [2] Chen Yafu editor of Civil Engineering Materials [M]. Guangzhou: South China University of Technology Press, 1996,117. [3] Xiong Dafang. civil power construction Quality Inspection [M]. Beijing: Ministry of Power Industry Construction Association word Division. 1996. ,293-294 [4] Leung Yun. construction technology [M]. Wuhan: Water Power Press ,1985,303-404. TemperatureControlTechnologyoverBig. - bulkConcreteBaseoftheSteamElectricGeneratorICEMin-jun (MaomingRilenThermoelectricProjeCtSection, Maoming525000, China) Abstract: Thefoundationof5 # steamelectricgeneratorinMaomingthermoelectricplant isthebig-bulkconcrete.Inordertoguaranteethequalityofconcret e, itrequirestemperaturecontrolonit.Duringthecon · struction, byusingreasonableconstructiontechnologyandtheeffec tivetemperaturecontrolmeasures, thereisnotemperaturebreakontheconcrete, andtheconstructionqualityof5 # steamelectricgeneratorisguaran-teed.Keywords: big-bulkconcrete; temperaturecontrol; thermocoupleelectronicmeasurer; temperaturebreak; temperaturestress
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