基于物元模型的多年冻土地区路面破损状况评价探讨

Evaluation of Pavement Dilapidation in Permafrost Region Based on Matter-Element Model

根据多年冻土地区青藏公路路面病害的特点确定了青藏公路沥青路面路面状况评价的指标,依据信息论中熵的方法,得到了路面状况各指标在综合评价中的权重.将路面状况分成优、良、中、次、差五个等级,建立了多年冻土地区路面状况评价的物元模型,通过对路面破损状况物元进行关联度计算,得到了路面破损状况的等级.以青藏公路某路段为例利用建立的物元模型,对路面破损状况进行了评价,结果表明该模型能准确地反映路面破损状况,适合多年冻土地区路面破损的评价.

Affected by low-temperature environment and the frozen soil condition,pavement diseases in permafrost regions are different from those in other regions.Pavement evaluation methods available in other places do not work in permafrost regions.In this paper,firstly,based on the characteristics of the Qinghai-Tibet Highway in permafrost regions,the evaluation indexes are determined by the concept of entropy,and the weigh of each index is worked out.Then the pavement condition can be divided in to five classes： excellent,good,common,inferior and bad,and the matter-element model of pavement condition can be established.Lastly,through calculating the relation grade of the pavement dilapidation,the pavement dilapidation rank is obtained.The results from the model for some pavements show that the method can evaluate the pavement dilapidation accurately and is available in permafrost regions.