Review of the Development and Innovation of Railway Survey Technology
Railway surveying is one of the important tasks in China's railway construction engineering.Through the unremitting efforts of several generations of railway surveyors,Chinese railway surveying technology has evolved from pure manual surveying and mapping at the beginning of the founding of the People's Republic to the current state of digitalization and automation,and is advancing towards intelligent surveying.This paper systematically summarized and reviewed the development history of surveying techniques in Chinese railway surveying process,including primary control surveying,1∶10000 topographic mapping,1∶2000 topographic mapping,centerline surveying,cross-section surveying,site topographic mapping,and existing railway surveying.It also studies the use of UAV LiDAR technology for special surveying tasks such as centerline and intersection surveying for new railways,achieving precision that meets the 10 cm limit requirement.New methods for conducting various surveying tasks on existing railways based on mobile laser scanning technology and UAV oblique photography surveying technology were introduced.The surveying precision essentially meets the requirements for existing railway centerline surveying with a planar detection limit difference of no more than 3cm and a general terrain elevation detection limit difference of no more than 5 cm.
railway engineeringsurvey technologytopographic surveycentral line surveyexisting railway survey
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