拱座大体积混凝土布设冷管温控效应研究  

Temperature control effect of cold pipes arranged in mass concrete of abutment

作　　者：杨添翼 田仲初[1] 许斌林 YANG Tianyi;TIAN Zhongchu;XU Binin(School of Civil and Environmental Engineering,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学土木与环境工程学院,湖南长沙410114

出　　处：《交通科学与工程》2025年第2期131-137,共7页Journal of Transport Science and Engineering

基　　金：国家自然科学基金项目(52078058)。

摘　　要：【目的目的】为改善拱座大体积混凝土布设冷管的温控效应,尤其是改善夏季气温较高时冷管降温效率严重降低情况下冷管的温控效应,对冷管的温控效应进行研究。【方法方法】从冷管的布设方式、冷管材料、循环水系统三个方面进行研究。【结果结果】在冷管的布设方式方面,通过对比分析蛇形上下层垂直式冷管布设方式与蛇形竖向垂直式冷管布设方式,发现蛇形竖向垂直式冷管布设方式的降温效率较高;在冷管材料方面,通过对比分析Q235钢和高强高导热铸造铝合金的屈服强度和导热系数,发现在保证强度的情况下高强高导热铸造铝合金的导热系数更高,改善了冷管的吸热效率;在循环水系统方面,通过在蓄水箱及拱座大体积混凝土冷管的入水口增加冷水机及配套水泵控制水温,提高了冷管的降温效率。【结论结论】从冷管布设方式、冷管材料、循环水系统三个方面进行温控效应的研究,对提高拱座大体积混凝土水化热降温效率有积极影响。[Purposes]To improve the temperature control effect of cold pipes arranged in mass concrete of abutment,especially for the condition of high temperatures in summer at which the cooling efficiency of cold pipes is seriously reduced,this paper investigated the temperature control effect of cold pipes.[Methods]The study was carried out in three aspects,namely,cold pipe layout,cold pipe material,and circulating water system.[Findings]In terms of cold pipe layout,through comparative analysis of serpentine upper and lower perpendicular cold pipe layout and serpentine vertical perpendicular cold pipe layout,it is found that the cooling efficiency of serpentine vertical perpendicular cold pipe layout is higher.In terms of cold pipe material,through comparative analysis of the yield strengths and thermal conductivities of Q235 steel and high-strength and high-conductivity casting aluminum alloy,it is found that the thermal conductivity of high-strength and high-conductivity casting aluminum alloy is higher under the circumstance of guaranteeing strength,which improves the heat absorption efficiency of the cold pipes.In terms of the circulating water system,the cooling efficiency of the cold pipes is improved by the installation of a cold water machine and the supporting pump to control the water temperature between the inlets of the cold pipes in mass concrete of abutment and the water storage tank.[Conclusions]The study delves into the temperature control effect of cold pipes from three aspects of cold pipe layout,cold pipe material,and circulating water system,which has a positive impact on improving the cooling efficiency of hydration heat for mass concrete of abutment.

关 键 词：拱座大体积混凝土 水化热控制 冷管布设 循环水系统 导热系数 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]