基于探地雷达技术的沥青面层压实质量评价研究

Study on compaction quality evaluation of asphalt layer based on ground penetrating radar technology

为了研究沥青面层压实程度与压实均匀性的评价方法,提高沥青面层压实质量,利用探地雷达系统对沥青面层压实参数进行检测,并连续输出大样本测量数据.根据规范中压实度要求并提出压实薄弱区间作为沥青面层压实程度评价指标,采用变异系数作为沥青层压实度数值分布均匀性的评价指标,引进半变异函数中的偏基台值为压实度空间变异程度的评价指标.采用上述指标对某市政路SMA-13沥青上面层压实质量进行评价,结果表明:采用探地雷达检测技术,可以快速、无损地对沥青面层压实质量进行评价,并可反映施工过程中存在的问题,为改进与提升施工工艺提供了理论依据与指导.

In order to study the evaluation method of compaction degree and compaction uniformity of asphalt layer and improve its compaction quality,the Ground Penetrating Radar(GPR)test system was used to collect the compaction parameter of asphalt layer and output continuous large samples.In this paper,the requirement of compactness in the specification and the weak compaction zone were proposed as the evaluation index of compaction degree of asphalt layer.The variation coefficient and the partial abutment value in the semi variation function were used as the evaluation indexes of the numerical distribution uniformity and spatial variation degree of the compactness,respectively.The above proposed indexes were utilized to evaluate the compaction quality of SMA-13 surface layer of a municipal road.The results show that the GPR detection technology can evaluate the compaction quality of asphalt layer quickly and non destructively,and reflect the faults in the construction process,which can provide rationale and guidance for improving and upgrading the construction technology.