Detection Methods for Ballast Supplement Amount of Newly-built Railway Lines Based on MLS
Aiming at the problem of high working intensity and low accuracy caused by traditional manual mapping of actual sections to calculate ballast supplement amount of ballast bed,we propose a detection method for ballast supplement amount of newly-built lines based on mobile laser scanning technology.First,with the help of mobile scanning system(MLS),high-accuracy point clouds are ef-ficiently obtained to extract the actual measured ballast bed section;Then,the ballast section is adjusted and designed according to the height excess and line spacing changes,and the excessive and inadequate areas of this section are obtained by comparing with the measured ballast bed section.Finally,the section method is used to accurately calculate the ballast supplement amount of the ballast bed.The experimental results show that the calculation error of the ballast supplement amount of the algorithm is within the allowable range,which can meet the specific construction requirements and provide a technical means for quantitative and rapid evaluation of the construction quality of ballast laying.
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