常用路面平整度评价指数与IRI相关关系研究

Study on the Correlation Between Common Pavement RoughnessEvaluation Indexes and IRI

道路工程中路面平整度评价指数较多,但各指数对路面平整度状况的反映较单一,无法进行全面评价。IRI因具有时间稳定性、空间可转移性、显著性、有效性的特点被多数国家采用,且车载式激光平整度仪使IRI的测量较简单,但IRI仅反映路面平整度的平均状况。为此,探究IRI与功率谱密度PSD、行驶质量指数RQI、行驶指数RN、标准差σ和不同长度直尺最大间隙h之间的关系,并梳理总结关系式,使IRI更加全面地反映路面平整度。

There are many evaluation indexes of road surface roughness in road engineering,but the reflection of each index is single,so it is impossible to carry out comprehensive evaluation.IRI is widely used in most countries because of its time stability,spatial transferability,significance and effectiveness.The vehicle-mounted laser profilometer makes the measurement of IRI simple,but IRI only reflects the average condition of road surface roughness.Therefore,the relationship between IRI and power spectral density(PSD),riding quality index(RQI),riding index(RN),standard deviation(σ)and the maximum clearance of straightedge of different length(h)is explored.The relationship is sorted out and summarized,which makes IRI more comprehensively reflect the road surface roughness.