Anti-floating anchor rod device used for urban rail earthwork construction

The invention relates to the technical field of anti-floating anchor rod devices, in particular to an anti-floating anchor rod device used for urban rail earthwork construction. A stop-grouting plug is fixedly arranged at the upper end of a main anchor rod, a tray is arranged above the stop-grouting plug, a first fixing piece is fixedly arranged above the tray, and a plurality of grout outlets are formed in the main anchor rod in a penetrating mode; a grouting opening is formed in the side wall of the lower end of the first fixing piece in a penetrating mode, a handle is held to press downwards to drive a second connecting rod to drive a bearing and a guide block to move downwards in a first moving groove in a clamped mode, the bearing drives a second threaded rod to move downwards, the second threaded rod drives a third fixing block and an inner ring clamping block to move downwards, and the inner ring clamping block and an outer ring clamping block are separated in a staggered mode. A second threaded rod dr