Analysis on Ballast Bed Structure Renovation Construction Technology after Settlement of Contact Channel by Freezing Method Construction on Subway Operating Line
With a large number of subway lines being put into operation across the country in recent years,the tunnel and line settlement has become increasingly prominent because the contact channel constructed by freezing method in underground line is affected by various factors such as groundwater,geology,and external construction.In order to renovate the operating line after settlement,study and master the track renovation construction technology when the settlement is more than 81 mm,standardize the construction process of the operating line,ensure the safety of construction and operation,and provide practical and feasible basis for the renovation construction,the ballast bed structure renovation construction technology after the settlement of the contact channel by freezing method construction in the subway operating line is formulated through research.Based on the construction practice of Metro Line 2 in a city,this paper analyzes the construction technology,control measures and precautions in the construction process.
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