高速公路改扩建工程旧路的检测及改善设计

Existing Pavement Detection and Improvement Design for Expressway Extension Project

为确定高速公路改扩建工程旧路路面的技术状况,借助路面智能检测车、落锤式弯沉仪、探地雷达等设备对道路路基与路面状况进行检测与评价,并结合路面钻芯试验确定路面典型病害的成因。针对现有路面评价指标不适用于高速公路改扩建的问题,提出路面面层评判关键指标——路面修补率,制定局部病害以及连续病害路段的处治方案,为高速公路改扩建工程旧路检测及改善设计提供参考依据。

In order to determine the technical conditions of existing pavement of the expressway extension project,intelligent pavement detection vehicle,falling weight deflectometer（FWD）and ground-penetrating radar（GPR）were applied to conduct the detection and evaluation.The causes of typical pavement diseases were identified by core sampling.Aiming at the problem that the evaluation index of existing pavement is not suitable for the reconstruction of expressway,the pavement repair rate,which is a key indicator,was proposed.Treatment programs were made for partial diseases and continuously distressed section,which provides reference to pavement detection and improvement design for expressway extension project.