case where the guardrail has already been laid, suspended structures can be used on both sides to support walking on the
guardrail;
2. Two vibrating rollers with leveling and slurry lifting functions, and the height and inclination angle of the rollers can be
adjusted up and down. At the same time, the shock-absorbing pad handwheel can be adjusted arbitrarily to achieve the adjustment of
the transverse slope of the bridge deck.