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内蒙古岛状多年冻土区公路冻害特征研究

Research on frost damage characteristics of highways in patchy permafrost region of Inner Mongolia
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摘要 针对内蒙古岛状多年冻土区公路冻害问题,对区域内博克图至牙克石、室韦至拉布大林、伊尔施至柴桥三条公路进行了冻害调查统计。基于调查结果以及冻土地基和路基温度场计算结果阐述了冻土路基主要病害类型与形成原因,分析了区域内外界环境对公路冻害的影响。研究结果表明:该路域环境具有地表植被茂密、水体丰富、季节性积雪融水等显著特征;博克图至牙克石和室韦至拉布大林两条公路病害主要是由多年冻土融沉作用引起,而伊尔施至柴桥公路的病害主要由冻胀作用导致;区域内新建公路会破坏原有的沼泽湿地生态系统,从而影响路基结构内部的热状态以及永久冻土;路域环境地表丰富水体、路基坡脚积水或径流、季节性积雪融水也会增加路基路面的病害风险,影响路基的稳定性。 Frost damage of roads in the high latitude permafrost region of Inner Mongolia often occurs.The investigation and statistics on frost damage of Boketu-Yakeshi,Shiwei-Labdalin and Yi'ershi-Chaiqiao highways are carried out.Based on the results of investigation and calculation of temperature field of frozen ground and subgrade,the main types and causes of subgrade failure are elaborated,and the influence of the environment on frost damage to the highway is analyzed.The results show that the highway environment is characterized by dense vegetation on the surface,abundant surface water,seasonal snow cover and melting water.The failure of Boketu-Yakeshi and Shiwei-Labdalin highways is mainly caused by the thaw settlement of permafrost,while that of Yi'ershi-Chaiqiao highway is mainly caused by frost heaving.Highway construction will destroy the original wetland ecosystem,and the thermal state of the subgrade and permafrost will also be affected.Abundant surface water,ponding or runoff by the embankment,seasonal snow cover and melting water also increase the risk of subgrade pavement failure and affect the stability of the subgrade.
作者 赵宇琴 徐湘田 张洪伟 王学营 钱宏宇 李高升 ZHAO Yuqin;XU Xiangtian;ZHANG Hongwei;WANG Xueying;QIAN Hongyu;LI Gaosheng(Institute of Transportation,Inner Mongolia University,Hohhot 010070,China;School of Ecology and Environment,Inner Mongolia University,Hohhot 010021,China;Inner Mongolia Autonomous Region Transportation Research Development Institute,Hohhot 010051,China;West Ujimqin banner Water Conservancy Development Center,Xilinhot 026200,China;College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China)
出处 《内蒙古工业大学学报(自然科学版)》 2023年第6期542-548,共7页 Journal of Inner Mongolia University of Technology:Natural Science Edition
基金 内蒙古自治区交通科技项目(NJ-2018-28) 内蒙古自治区自然科学基金项目(2020MS05077)。
关键词 内蒙古 岛状多年冻土区 公路冻害特征 影响因素 Inner Mongolia patchy permafrost region frost damage characteristics influence factors
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