A method for plugging soft ground has a helical screw to bore the ground and to fill with stiffening material and whose rotational driving torque is monitored and controlled

摘要

The screw (4) in a tube () is forwarded on a carriage (3) to bore a hole (10) driven by a motor (6) to extract spoil and then to reverse to fill the hole with mineral aggregate from a silo (12). The motor torque is constantly monitored and controlled to suit the conditions.