Research on Calculation of Contact Network Parameters and Construction Techniques Based on Tunnels,Tracks,and the Networks
In order to solve the problem that the parameter measurement and construction of the urban rail transit catenary are limited by the schedule of laying track in front of the station,the trackless measurement technology of the catenary comes into being.The currently applied trackless measurement technology requires the use of a total station for on-site station setting and layout.Therefore,when encountering poor visibility in tunnels that fails to meet the environmental requirements for total station setting and measurement,this technology cannot be applied.In order to overcome the shortcomings of the existing trackless measurement technology,based on the high quality assurance rate of shield tunnel section construction,as well as the design relative position relation among the shield tunnel section,track and catenary specialty,the CAD plane model is established to deduce the catenary suspension device parameters,calculate the additional horizontal offset,numerical offset,suspension point offset line center value,and finally obtain the production length of hanger column,realignment angle for installation,and other data.The successful application of this technology in the back section of the Wuhan Metro Line 19 project further verifies the applicability and advancement of the technology.
tunnel section parametersconstruction ahead of the tracktrack laying parametersfabricated construction
NETL
NSTL
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