折线形通风管对陡坡冻土宽幅路基降温效果研究  

STUDY ON THE COOLING EFFECT OF CURVED VENT PIPES ON WIDE FROZEN SOIL SUBGRADE WITH STEEP SLOPES

作　　者：邢俊杰 张致龙 伊帕丽亚·阿布都维力 刘柱 郝戈 付庭 XING Jun-jie;ZHANG Zhi-long;YIBAILIYA-Abuduweili;LIU Zhu;HAO Ge;FU Ting(Construction and Engineering College of Xinjiang University,830000,Wulumuqi,China;Urumqi,Xinjiang Uyghur Autonomous Region,830000,Wulumuqi,China;School of Architectural Engineering,Xinjiang University,830000,Wulumuqi,China)

机构地区：[1]中建新疆建工(集团)有限公司,乌鲁木齐830000 [2]中建新疆建工土木工程有限公司,乌鲁木齐830000 [3]新疆大学建筑工程学院,乌鲁木齐830000

出　　处：《建筑技术》2024年第4期477-482,共6页Architecture Technology

摘　　要：在永久冻土段修建宽幅路基需解决高寒、高海拔、高纬度等恶劣因素所造成路基不均匀沉降、纵向裂缝、道路翻浆等严重工程病害问题。以新疆中天山冻土段为例,现场试验观测数据为基准采用数值计算方法;研究曲线型通风管结合碎石层复合路基制冷效果。研究结果表明:半挖半填路基温度场横向差异明显,在20个运营年后,左路肩与路基中心处最大融深相差3 m;在第20年时,折线形通风管路基冻土上限为1.45 m相对普通路基提高了6.55 m。折线形通风管路基在第10个运营年后,路面以下4 m处-1.8℃等温线形成一个冻结区域,并在之后的5年内沿着路基横向与坡向发展。To build wide subgrade in permafrost sections,it is necessary to solve serious engineering problems such as uneven subgrade settlement,longitudinal cracks and road mud squeezing arising from high cold,high altitude,high latitude and other factors.Taking the frozen soil section of Zhongtianshan mountain in Xinjiang as an example,the numerical calculation method was adopted based on the field test data.The cooling effect of curved vent ducts and composite gravel subgrade was studied.According to the research results:The temperature fields of half-dug and half-filled subgrade have significant transverse differences.After 20-year operation,the maximum melting depth difference between the left shoulder and subgrade center is 3m.The upper limit of frozen soil in the subgrade with curved vent pipes is 1.45m in the 20th year,which is 6.55m higher than that of the ordinary subgrade.After the 10th year of operation of the subgrade with curved vent pipes,a frozen area is formed at the-1.8℃ isotherm 4m below the road surface,which develops in the transverse direction and along the slope of the subgrade in the following 5 years.

关 键 词：高寒山区 半挖半填路基 折线形通风管 斜坡冻土 

分 类 号：X74[环境科学与工程—环境工程]