Soil stabilizing apparatus

In a method of mixing a soil stabilizing material in solid or liquid form into a soil course by means of a carrier transportable over the surface of the soil and having a plurality of material injecting members, said method comprising the step of moving the plurality of material injecting members through the soil course in a closed path relative to the carrier while the carrier is being transported over the surface of the soil, the improvement wherein the closed path includes at least one substantially straight portion which is not substantially parallel to the direction of motion of the carrier and the soil stabilizing material is injected into the soil course while the material injecting members are moving along said substantially straight portion of the closed path.

A method of mixing into a ground layer a ground stabilizing material in solid or liquid form, whereat a number of material injecting members are caused to move in an endless path on a mobile vehicle so that a substantial part of the material discharge from the members takes place at their movement in a substantially linear portion of the path across the direction of vehicle movement, characterized in that the material is agitated while passing through the material injecting members and is proportioned variably on being discharged, so that a predetermined amount per time unit leave the material injecting members.