探地雷达无损检测技术在某快速路沥青路面中的应用

Application of GPR Non destructive Testing Technology in Asphalt Pavement of Expressway

探地雷达探测是道路内部技术状况无损检测的主要手段之一。道路结构各层材料差异较大,其中基层孔隙率相对较高,容易出现松散和压实不均等问题。传统开挖式检测方法往往存在工期较长、交通恢复慢、人力成本高等弊端。本文基于快速路工程案例,通过探地雷达对快速路沥青道路内部技术状况进行无损检测,并结合路面承载能力及路面状况指数确定了路段病害处置方案,改变了只能通过路面指标制定设计方案的现状,为快速路恢复设计提供科学的参考。

Ground penetrating radar(GPR)is one of the main means of non-destructive detection technology of pavement internal conditions.The material of each layer of the pavement structure is much different,and problems of loose and uneven compaction are inevitable because the porosity of the base layer is relatively high.Traditional excavation test methods often have drawbacks such as long construction periods,slow traffic recovery,and high labor costs.Based on the expressway project,pavement internal conditions in asphalt pavement are nondestructive tested by GPR.And the treatment strategy of road disease is proposed according to the road bearing capacity and pavement condition index,which will change the current situation that the design scheme can only be made through pavement indicators and provide the scientific basis for the recovery design about expressway construction.