高原冻土区既有公路病害特征和融沉变形分析  

Analysis on Disease Characteristics and Thaw Settlement Deformation of Existing Highway in Permafrost Regions over Plateau

作　　者：李金平[1] 

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安710065

出　　处：《路基工程》2016年第4期11-16,共6页Subgrade Engineering

基　　金：国家科技支撑计划(2014BAG05B07);青海省交通科技项目(2011-02)

摘　　要：基于G214既有公路现场调查和实体监测,对公路沿线冻土特征与道路病害之间的关系等进行了深入分析。采用现场调查的方法对沿线路面病害状况进行了调查分析,结果表明:路基路面的病害类型及病害程度主要与路面类型、冻土类型和路基高度有关。结合现场调查结果和监测资料分析,对G214沿线公路病害成因进行了深层次的探讨,并得出冻土区道路的病害主要由路基的不均匀融沉变形引起的。通过对沿线路面实测变形调查和分析,得出了在路面宽度为8.5 m的水泥混凝土路面纵裂发生的位置和路面发生纵裂时的临界沉降值,这对冻土区水泥混凝土路面病害的防治具有重要意义。This paper, depending on field investigation and monitoring on the existing G214 Highway, made deep analysis on the relation between the characteristics of permafrost along the Highway and the diseases thereof. The result of the investigation on pavement disease shows that the type of diseases on the roadbed and its extent relate to the pavement type, frozen soil type and subgrade height mainly. With the results of field investigation and monitoring, the disease causes were discussed profoundly and then found to be resulted from uneven settlement of subgrade mainly; in addition, with the measured deformation of pavement, the position where and the critical value of settlement when the longitudinal crack arose on the cement concrete pavement in 8.5 m wide, were obtained. It is important for prevention of diseases on cement concrete pavement in permafrost regions.

关 键 词：多年冻土 路基病害 病害类型 融沉特征 不均匀沉降 

分 类 号：U416.168[交通运输工程—道路与铁道工程]