Water Gushing and Deformation Control Technology for Construction of Karst Stratum Underpassing Goaf Section
Based on the railway tunnel project of a karst stratum underpassing goaf section,the causes of diseases in the field are analyzed,and the effects of different treatment measures are discussed.The main causes of water gushing and deformation are the fracture,stability decline and fissure seepage of surrounding rock mass.The single treatment measure has poor effect and certain potential risk.The combined use of advanced geological prediction,strengthening of initial support,backfilling under reverse pressure,closed grouting and adding drainage holes is more effective.The deformation of the tunnel after treatment is effectively controlled.The monitoring and measurement show that the deformation value tends to be smooth and stable after 16 days.
advanced predictionkarstgoafwater gushingmonitoring and measurementdisaster prevention and controltreatment effect
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