Research on Separation Launching Reinforcement Technology of Slurry Balance Shield in Cable Tunnel Project
Based on a cable tunnel project,the separation lanuching technology for slurry shield is put forward.The numerical simulation is used to analyze the soil reinforcement at the initial portal,and the results show that when no reinforcement measures are taken,the soil in front of the portal occurs the global instability and slides towards the portal as a whole,the soil above collapses downwards in an hourglass shape.With the increasing of soil reinforcement strength,soil self-stability becomes stronger and stronger.When the reinforcement strength exceeds 10GPa,the soil is considered to be self-stable.Considering the engineering practice,it is suggested to adopt the reinforcement scheme of rotary jet grouting pile with C20 and above concrete grade.
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