Design of Overhead Line Scheme for Small Angle Undercrossing Railway Tunnel Bridge
In the construction of undercrossing railway tunnel bridges,in order to ensure that the passage of existing railways is not af-fected,it is necessary to reinforce and overhead the existing railway lines during construction to ensure that the construction of tunnel bridges is completed without affecting the railway traffic conditions.Whether the overhead mode is reasonable or not will have a signifi-cant impact on the safety,economy and construction period of the whole project.the tunnel bridge of Detian Railway is taken as an ex-ample.The three overhead schemes of D temporary beam overhead line,portal pier overhead line and large excavation after railway line breaking are compared and designed respectively.The advantages and disadvantages of the three methods are compared and analyzed from the perspective of design and construction.Finally,it is concluded that for the branch railway with low technical standards and few driving pairs,the large excavation after railway line breaking is a relatively small investment and relatively small impact on the railway.
tunnel bridgesmall anglerailway lines overheadrailway line breakinglarge excavation
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