Key Control Technology of Long-distance Crossing Dangerous Bridges for Shield Tunnels Under Complex Conditions
The shield tunnel of a subway section in Urumqi City crosses Renmin Road overpass and hetan expressway for a long distance,Renmin Road overpass is identified as dangerous bridge.The shield tunneling parameters,slag discharge amount,synchronous grouting and secondary grouting are the main technical control measures,and the tunnel external geological advance forecast,soil pre-reinforcement,bridge pre-support top,automatic monitoring and measurement are auxiliary technical measures for control,the bridge deformation and pavement deformation at different crossing stages are analyzed.The analysis results show that,the technical measures taken can effectively control the influence of shield tunneling on the building and the ground.
NETL
NSTL
万方数据
维普
