在水泥路面刻槽参数调研的基础上,利用数值模拟激光断面仪检测的刻槽路面纵断面,分析激光传感器采样间距和刻槽参数对平整度检测结果的影响程度和规律,通过现场试验对理论分析结果进行验证。研究发现,采用2mm以内的采样间距可基本消除连续刻槽造成的IRI检测误差;在常用的刻槽参数范围内,间断刻槽的平均误差约为0.15。总的来说,激光平整度仪检测刻槽路面的精度能够满足养护管理需求,不会造成行驶质量良好而检测结果明显偏差的现象。 Based on the investigation of grooved parameters of cement pavement, the longitudinal section of grooved surface measured by laser profilometer was numerically simulated. The influence degree and regularity of sampling interval and groove parameters of laser sensor on flatness test results were analyzed. By field test, Analysis results to verify. The study found that the use of sampling interval within 2mm can basically eliminate the IRI detection error caused by continuous groove; in the range of commonly used groove parameters, the average error of intermittent groove is about 0.15. In general, laser flatness tester groove groove detection accuracy to meet the needs of conservation and management, will not result in good driving quality and test results were significantly deviation phenomenon.