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为实现全断面的路面平整度检测及平整度缺陷位置的精确定位,详细综述了当前路面平整度检测的传统方法及未来发展方向,并在此基础上提出了一种基于路面高程自动测量的全断面平整度计算方法。利用自动跟踪全站仪、激光测距传感器、倾角仪等装置测量路面高程,根据测得的路面点三维坐标信息,采用Kriging插值法对离散测量点高程进行全断面插值,从而生成路面高程云图,由此获取道路任意纵断面的高程值,进而计算任意纵断面的国际平整度指数(IRI)值,并根据计算结果判断检测路段中所有路面纵断面的IRI值是否符合该级别公路路面平整度要求,对于不合格纵断面,利用其纵断面高程值剖切线,查找其高程值突变位置,进而确定路面平整度缺陷位置。研究结果表明:该方法测得的路面点三维坐标信息平面位置定位相较传统GPS和编码器定位精度更高,其平面定位精度可以达到毫米级;该方法具有良好的适用性,所计算的IRI值精度较高,相对误差小于5%;对于不符合规范要求的路段,其可为路面修整提供明确的位置指示,能够实现路面全断面高精度平整度检测及平整度缺陷位置的精确定位,有利于正确评估道路质量评价及后期养护管理。
In order to achieve the full-surface pavement roughness detection and the flatness defect location precise positioning, the traditional method and the future development direction of the current pavement roughness detection are summarized in detail. Based on this, a new method based on automatic measurement of the pavement elevation Sectional flatness calculation method. The elevation of the road surface is measured by means of automatic tracking total station, laser ranging sensor and inclinometer, Kriging interpolation method is used to interpolate the elevation of discrete measuring point based on the measured three-dimensional coordinate information of the road surface, Thus, the elevation value of any longitudinal section of the road is obtained, and then the international roughness index (IRI) of any longitudinal section is calculated. Based on the calculation results, it is determined whether the IRI values of all the longitudinal sections of the road section meet the requirements of road surface roughness For the unqualified longitudinal section, the vertical height of the vertical section is used to cut the line to find the sudden change of the elevation value, and then to determine the position of the flatness defect. The results show that the proposed method is more accurate than the traditional GPS and encoder in positioning the plane location of road surface points and the plane positioning accuracy can reach millimeter level. The proposed method has good applicability. The calculated IRI The value of the accuracy is high, the relative error is less than 5%; for non-compliance with the requirements of the road section, which can provide a clear road pavement location instructions, to achieve full precision pavement surface roughness detection and flatness defect location accurate positioning, there Which is conducive to the correct assessment of road quality evaluation and post-maintenance management.