本文選題：大體積混凝土 + 水管冷卻　； 參考：《西安理工大學(xué)學(xué)報(bào)》2017年03期

【摘要】：水管冷卻是大體積混凝土最為有效、使用最為廣泛的溫控防裂措施,而水管參數(shù)對(duì)冷卻效果影響顯著。本文以某混凝土重力壩的4個(gè)澆筑層為研究對(duì)象,采用熱流耦合算法,對(duì)影響水管冷卻效果的主要參數(shù)進(jìn)行定量分析。研究結(jié)果表明:通水水溫由20℃減小至8℃過(guò)程中,水溫每降低1℃,混凝土最高溫度降低約0.30℃。通水流量從0.9m3/h增大至1.2m3/h過(guò)程中,流量每增加0.1m3/h,混凝土最高溫度降低約0.33℃;通水流量從1.2m3/h增大至1.5m3/h過(guò)程中,流量每增加0.1m3/h,混凝土最高溫度降低約0.28℃。水管間距小,通水水溫低,通水流量大時(shí)冷卻效果較好,采用雙循環(huán)水管布置形式時(shí)冷卻效果較好。實(shí)際工程中應(yīng)綜合考慮這些參數(shù)以確定最佳冷卻方案。
[Abstract]:Water pipe cooling is the most effective mass concrete, the most widely used temperature control anti crack measures, and the water pipe parameters have a significant influence on the cooling effect. In this paper, 4 pouring layers of a concrete gravity dam are taken as the research object, and the heat flow coupling algorithm is used to quantitatively analyze the main parameters affecting the cooling effect of the water pipe. In the process of water and water temperature from 20 C to 8 C, the water temperature is reduced by 1 degrees centigrade, and the maximum temperature of concrete is reduced by about 0.30. The flow flux is increased from 0.9m3/h to 1.2m3/h, the flow rate increases by 0.1m3/h and the maximum temperature of concrete is reduced by about 0.33 degrees C; the flow rate is increased from 1.2m3/h to 1.5m3/h, and the flow rate increases to 0.1m3/h and the highest concrete temperature. The cooling effect is better when the water pipe is low, the water temperature is low, the water temperature is low and the water flow is large. The cooling effect is better when the double circulating water pipe arrangement is adopted. In practical engineering, the optimum cooling scheme should be considered synthetically in the actual project.
【作者單位】： 西安理工大學(xué)水利水電學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51409207,51609200,51409208) 中國(guó)博士后科學(xué)基金資助項(xiàng)目(2015M582765XB) 西安理工大學(xué)科技創(chuàng)新計(jì)劃資助項(xiàng)目(2016CX24)
【分類號(hào)】：TV544

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