Discussion on Treatment Measures of Water Leakage in Monolithic Track Bed of Subway Shield Tunnel
Taken the serious water leakage of monolithic track bed in a shield tunnel of an operating subway line in Beijing as an example,the causes are analyzed from environmental factors and structural defects,and the path is studied primarily;The action law of longitudinal slope,water head pressure,delay resistance and the resulting leakage of track bed are expounded;Under the structural deformation,track alignment monitoring and prevent track bed deformation,it is put forward that the type,scope and degree of disease are determined by radar scanning be-fore construction,and the effect of grouting treatment is evaluated by radar scanning after construction;The system treatment process is divided into three key steps of pressure relief sealing,grouting behind the tunnel and epoxy re-inforcement.The construction process control indexes of each step are given to ensure the grouting effect.Finally,the expected treatment effect is achieved by the above measures.
subwayshield tunnelmonolithic track bedwater leakage of track bed structuretreatment measures
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