Analysis on Double Liquid Synchronous Grouting Technology and Application Effect of Super Large Diameter Shield Tunnel
The double liquid synchronous grouting equipment and ground mixing equipment of super large diameter shield tunnel in Beijing East Sixth Ring Road Reconstruction Project are introduced.Considering the rapid solidification characteristics of double liquid slurry,the special grouting equipment is used to effectively solve the problem of double liquid slurry plugging and effectively avoid the construction problems caused by plugging.The measures of using bentonite to seal the shield tail are put forward to prevent the shield machine from being wrapped by double liquid slurry after shutdown,and to protect the shield tail slurry stop plate,steel plate bundle and shield tail brush from being destroyed.In the process of shield tunneling,it is necessary to control the grouting volume,grouting pressure and grouting speed.The surface settlement caused by shield tunneling in this project can be controlled within 13mm,and the floating amount of segments is basically-5～10mm.It can be seen that double liquid synchronous grouting can effectively control surface settlement and segment floating.
万方数据
维普
