四季越野滑雪隧道雪道下侧保温措施研究  

Research on thermal insulation measures for the underpass of four seasons cross country ski tunnel

作　　者：朱锦烁 李明飞 张航 盛国华 ZHU Jinshuo;LI Mingfei;ZHANG Hang;SHENG Guohua(School of Architecture and Civil Engineering,Shenyang University of Technology,Shenyang 110870,China;China Construction Sixth Bureau Construction Development Co,Tianjin 300450,China)

机构地区：[1]沈阳工业大学建筑与土木工程学院,辽宁沈阳110870 [2]中建六局建设发展有限公司,天津300450

出　　处：《冰川冻土》2025年第1期179-186,共8页Journal of Glaciology and Geocryology

基　　金：辽宁省交通厅项目“碱激发钢渣粉RPC力学性能及在道路工程中的应用”(2023034)资助。

摘　　要：为了解决四季越野滑雪隧道的雪道下侧负温影响可能引起的冻害问题,将雪道下侧结构改造为仰拱形式的新型保温结构,以水胶比、发泡剂掺量、纤维掺量为主要因素,通过正交试验制备了一种强度高、保温隔热性能好的泡沫混凝土保温材料。通过土的相变潜热得到了围岩的冻结深度,将其作为热流量计算的围岩深度,求得未设保温隔热层冻结深度下隧道的热流量,再根据圆筒传热理论计算未设保温层围岩衬砌间的接触面温度,运用MATLAB对仰拱保温形式下的隧道各材料接触面温度进行有限差分计算,并与未设保温层情况下的隧道理论计算结果进行对比分析。结果表明:当掺泡量为1.5%,水胶比为0.6,纤维掺量为0.2%时,泡沫混凝土抗压强度较高,导热系数较低,作为保温材料效果最佳。雪道下侧增加仰拱保温层后,衬砌间接触面温度以及一衬围岩间接触面温度比无保温层时都高出近14℃左右,新型仰拱保温结构的保温效果明显。In order to tackle the four seasons cross country ski tunnel of the negative temperature impact of the lower side of the snow road,the lower side of the snow road structure is transformed into a new type of thermal insulation structure in the form of a superelevation arch,with the water-cement ratio,blowing agent dosage,fiber dosage as the main factors,through the orthogonal test to prepare a high-strength thermal insulation foam concrete insulation materials with good thermal insulation properties,according to the compressive strength test,thermal conductivity measurement to get its optimal ratio,through the latent heat of the earth’s phase change the freezing depth of the surrounding rock is obtained and when calculating the heat flow,because of the negative temperature in the tunnel cave all year round,the depth of the surrounding rock is taken as the freezing depth,and the heat flow of the tunnel under the freezing depth of the uninsulated heat preservation and thermal insulation layer is obtained,and the temperature of the contact surface between the uninsulated perimeter lining is calculated according to the theory of heat transfer from the cylinder,and when the tunnel is the superelevation arch heat preservation form,it is not possible to use the traditional model to calculate,and the calculation model will be optimized and used to calculate the heat flow of the tunnel.MATLAB on the pitch arch insulation form of the tunnel under the contact surface temperature of each material finite difference calculation,and with no insulation layer under the tunnel theoretical calculations for comparative analysis,the following conclusions:the same foam content,the greater the water-cement ratio,the higher the compressive strength,the higher the fiber content,the lower the thermal conductivity;in the case of the water-cement ratio of 0.6,the fiber content of 0.2%,the compressive strength and thermal insulation of concrete has the best compressive strength and thermal insulation performance.Numerical simulation results

关 键 词：四季越野滑雪隧道 泡沫混凝土 仰拱保温结构 有限差分 温度场 正交试验 抗压强度 保温材料 

分 类 号：U457[建筑科学—桥梁与隧道工程]