English：

The double liquid synchronous grouting equipment and ground mixing equipment of super largediameter shield tunnel in Beijing East Sixth Ring Road Reconstruction Project are introduced.Considering the rapid solidification characteristics of double liquid slurry, the special grouting equipmentis used to effectively solve the problem of double liquid slurry plugging and effectively avoid theconstruction problems caused by plugging. The measures of using bentonite to seal the shield tail are putforward to prevent the shield machine from being wrapped by double liquid slurry after shutdown, and toprotect the shield tail slurry stop plate, steel plate bundle and shield tail brush from being destroyed. Inthe process of shield tunneling, it is necessary to control the grouting volume, grouting pressure andgrouting speed. The surface settlement caused by shield tunneling in this project can be controlled within13mm, and the floating amount of segments is basically -5 ~ 10mm. It can be seen that double liquidsynchronous grouting can effectively control surface settlement and segment floating.