摘要
为保证冬季综合管廊综合舱(水舱)水管的正常运行,对北京某管廊逃生竖井的温度进行了实验测试,并用数值模拟研究了地域、逃生口直径、埋深对逃生竖井下方管廊内温度的影响。结果表明:综合管廊综合舱内的温度受地域(冻土层深度和地下土壤温度)影响较大,并且与外界环境有着密切的关系,外界环境温度每降低5℃,温度最大降低1.7℃;逃生竖井下方廊内温度与逃生口直径呈负相关、与逃生竖井的埋深呈正相关,直径每增加0.2 m,温度最多降低0.6℃,埋深每增加0.5 m,温度最多升高0.4℃;对于严寒地区有必要采取双层井盖或保温井盖的措施,采用双层井盖时,第二层井盖设置在冻土层深度处时对廊内保温效果最好,最大温度相差4.9℃;综合舱两边靠上的区域相较于其他位置温度较高,最大温差可达1.64℃,故水管应放在舱内两边靠上的位置。研究结论为管廊的设计和运维提供参考价值。
In order to ensure the normal operation of the water pipe in the comprehensive compartment(water compartment)of the utility tunnel in winter,the temperature of the escape shaft of a utility tunnel in Beijing was tested experimentally,and numerical simulation was used to study the influence of the region,the diameter of the escape outlet,and the burial depth on the temperature in the utility tunnel below the escape shaft.The results show that the temperature in the comprehensive compartment of the utility tunnel is greatly affected by the region(the depth of the frozen soil layer and the temperature of the underground soil),and has a close relationship with the external environment.For every 5℃decrease in the external environment temperature,the maximum temperature decreases by 1.7℃.The temperature in the utility tunnel below the escape shaft is negatively correlated with the diameter of the escape outlet,and positively correlated with the buried depth of the escape shaft.For every 0.2 m increase in diameter,the temperature decreases by at most 0.6℃,and for every 0.5 m increase in buried depth,the temperature increases by at most 0.4℃.For cold regions,it is necessary to take measures of double well covers or thermal insulation covers.When using double well covers,the second layer of well covers is set at the depth of the frozen soil layer,and the best thermal insulation effect is found in the water compartment.The maximum temperature difference is 4.9℃.Compared with other positions,the temperature of the upper area on both sides of the comprehensive compartment is higher,with the maximum temperature difference up to 1.64℃.Therefore,the water pipe should be placed on the upper area on both sides of the utility tunnel.The research conclusions provide reference value for the design and operation and maintenance of the utility tunnel.
作者
赵光辉
许淑惠
何振成
刘斌
李志霏
徐荣吉
ZHAO Guang-hui;XU Shu-hui;HE Zhen-cheng;LIU Bin;LI Zhi-fei;XU Rong-ji(Beijing Engineering Research Centre of Sustainable Energy and Buildings,Beijing University of Civil Engineering and Architecture,Beijing 102616,China;Beijing General Municiple Engineering Design&Research Institute,Beijing 100082,China)
出处
《科学技术与工程》
北大核心
2022年第22期9768-9774,共7页
Science Technology and Engineering
基金
住房和城乡建设部研究开发项目(2018-K4-009)
北京市科技计划(Z171100000517007)。
关键词
综合管廊
逃生竖井
结冰
井盖
数值模拟
utility tunnel
escape shaft
icing
well cover
numerical simulation
