Safety Risk Assessment of Railway Bridge Construction Based on LEC Method
The construction of railway bridges poses great risks to the operation of existing railway lines.Therefore,it is imperative to conduct a safety risk assessment of the project prior to the commencement of construction.Firstly,a risk source list is compiled by identifying initial risks,and the LEC(Likelihood,Exposure,Consequence)method is adopted to qualitatively evaluate the probability of occurrence of each risk and determine the risk level,followed with the formulation of corresponding prevention plans and measures.Secondly,the midas GTS NX soft-ware is utilized to calculate the railway subgrade displacement caused by the construction of railway bridges.The calculation results indicate a maximum additional settlement displacement of 2.041 mm and a maximum additional horizontal displacement of 0.177 mm.Through a comprehensive qualitative and quantitative analysis,it can be con-cluded that while the construction and operation of railway bridges will have a certain impact on the deformation of railway subgrades,the impact values meet the regulatory control requirements.
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